TACO ZONE CONTROLS WIRING GUIDE · 2019-02-04 · TACO ZONE CONTROLS WIRING GUIDE Pages Switching Relays – Single Zone Wiring 2 – 2 Switching Relays – Oil Boiler Wiring Safety

TACO ZONE CONTROLS WIRING GUIDEPages

Switching Relays – Single Zone Wiring 2 – 2

Switching Relays – Oil Boiler Wiring Safety Notice 2 3 – 4

Switching Relays – NON EXP Connected Together with Priority 5 – 11

Switching Relays – EXP Connected Together with Priority 12 – 14

Switching Relays – Multiple Indirect Hot Water Heaters 15 – 16

Switching Relays – EXP Connected To Reset Controls (PC700, 702 & 705) 17 – 28

Zone Valve Controls – NON EXP Connected Together with Priority 29 – 34

Zone Valve Controls – EXP Connected Together with Priority 35 – 38

Zone Valve Controls – Connected To Reset Controls (PC700, 702 & 705) 39 – 46

Hydro Air Fan Controls (HAFC 101 & 201) 47 – 51

Specialty Thermostat and Zone Valve Wiring 52 – 56

Radiant Mixing Block 57 – 58

X-Pump Block 59 – 61

iSeries Mixing Valves 62 – 63

Low Water Cutoffs and Electric Water Feeders 64 – 79

Aquastat Wiring 80 – 86

Instruction Sheets 87 – 97

Standard Terms and Definitions – 98

Cross Reference 99 – 100

Do it once.Do it right.

© Taco Catalog No. 100-9.0 Effective Date: July 1, 2010Supersedes Date: July 1, 2007

TACO Zone Control Product Information

Switching RelaysProduct No. DescriptionSR501 1 Zone Switching RelaySR501-845RP 1 Zone Switching Relay Replacement PC Board for

Honeywell R845, RA89A, RA832 or Comparable RelaySR502 2 Zone Switching Relay with PrioritySR503 3 Zone Switching Relay with PrioritySR504 4 Zone Switching Relay with PrioritySR506 6 Zone Switching Relay with Priority

Switching Relays with PowerPort Options and Expandable to 20 ZonesProduct No. DescriptionSR501-EXP 1 Zone Switching RelaySR503-EXP 3 Zone Switching Relay with Priority and 3 PowerPortsSR504-EXP 4 Zone Switching Relay with Priority and 3 PowerPortsSR506-EXP 6 Zone Switching Relay with Priority and 3 PowerPorts

Zone Valve ControlsProduct No. DescriptionZVC403 3 Zone Valve ControlZVC404 4 Zone Valve Control with PriorityZVC405 5 Zone Valve ControlZVC406 6 Zone Valve Control with Priority

Zone Valve Controls with PowerPort Options and Expandable to 20 ZonesProduct No. DescriptionZVC404-EXP 4 Zone Valve Control with Priority and 2 PowerPorts ZVC406-EXP 6 Zone Valve Control with Priority and 2 PowerPorts

Plug-In PowerPort Cards (For use with all -EXP controls)Product No. DescriptionPC600 Post Purge Timer Plug-In CardPC605 Priority Protection Plug-In CardPC610 Universal Timer/Pump Exercise Plug-In Card

Add-On Power Controls (For use with all -EXP controls)Product No. DescriptionPC700 Boiler Reset ControlPC702 2-Stage Boiler Reset ControlPC705 Variable Speed Pump Injection Mixing Control

Fan ControlsProduct No. DescriptionHAFC101 Hydro Air Fan ControlHAFC201 Hydro Air Fan Control with Optional Time Delays

Do it once.Do it right.

2

AT

TO: 1

20 V

AC

PO

WER

CIR

CU

LATO

R

120

VAC

INPU

T

THER

MO

ST

RW

TT

CO

M

24 VAC

N/O

N

/C

N/C

N

/ON

H3

44

66

5

TO: Z

C

SR50

11

ZO

NE

SWIT

CH

ING

REL

AY

POW

ER

T S

TAT

TO: Z

RALT

ERN

AT

IVE

WIR

ING

(TA

NK

LESS

CO

IL)

T

SR50

1 Sw

itchi

ng R

elay

Wiri

ng

AT

TO: 1

20 V

AC

POW

ER

CIR

CU

LATO

R

JUM

PE

R

120

VAC

INPU

T

THER

MO

ST

RW

TT

CO

M

24 VAC

N/O

N

/C

N/C

N

/ON

H3

44

66

5 TO: T

T O

N B

OIL

ER

SR50

11

ZO

NE

SWIT

CH

ING

REL

AY

POW

ER

T S

TAT

TY

PIC

AL

WIR

ING

(CO

LD S

TA

RT

)

T

TO: 1

20 V

AC

PO

WER

CIR

CU

LATO

R

RW

TT

CO

M

24 VAC

N/O

N

/C

N/C

N

/ON

H3

44

66

5 TO: T

T O

N B

OIL

ER

SR50

11

ZO

NE

SWIT

CH

ING

REL

AY

POW

ER *

T S

TAT

*

ALT

ERN

AT

IVE

WIR

ING

(24 V

AC

PO

WER

ED I

NP

UT

SIG

NA

L)

NH REM

OVE

JUM

PER.

DO

NO

T C

ON

NEC

T PO

WER

TO N

AN

D H

TER

MIN

ALS

.

*T

STA

T LI

GH

T W

ILL

GO

ON

AN

D O

FF W

ITH

24

VAC

SIG

NA

L. P

OW

ER L

IGH

TW

ILL

ALW

AYS

BE

OFF

.

24 V

AC

SIG

NA

L

No

te:

Wh

en u

sin

g A

lter

nat

ive

Wir

ing

dia

gram

, th

e bo

iler

op

er-

atin

g co

ntr

ol’s

ZC

ter

min

al w

ill

see

the

load

of

the

circ

ula

tor(

s).

Warn

ing

:W

hen

u

sin

g A

lter

nat

ive

Wir

ing

dia

gram

, w

irin

gin

stru

ctio

ns

mu

st b

e fo

llow

ed s

o p

ower

ori

gin

ates

fro

m t

he

boil

eraq

uas

tat.

Fai

lure

to

foll

ow t

hes

e w

irin

g in

stru

ctio

ns

may

res

ult

ina

seco

nd

ary

sou

rce

of p

ower

bei

ng

con

nec

ted

to

the

boil

er t

hat

may

act

ivat

e it

un

der

cert

ain

cir

cum

stan

ces,

cau

sin

g in

jury

or

deat

h.

NOTE: No tankless coil priority.

3

(cont.)

NOTE: Tankless coil has priority.

THREE ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY

THERMOSTAT

FUSE 1 AMP

24 VACPOWER

ZONE 1 ZONE 2 ZONE 3

120 VOLT CIRCULATORS ZC X1

ZONE1 ZONE2 ZONE3

SR 503

ZONE 2

POWERZONE 1

ZONE 3

L1 L2 T T

LINE VOLTAGEOIL BURNER RELAY

CIRCULATORON BOILER

(IF ATTACHED)

B2

C1

B1ZR

HONEYWELL L8124OR EQUAL

120 VAC INPUT

C2

ZC

THERMOSTAT

L1 L2

(NEUTRAL)(HOT)

CIRCUITBREAKER

CUSTOMEREMERGENCY

SWITCH

THERMALFUSE

(FIROMATIC)

SERVICESWITCH

LOWWATERCUTOFF

N P HX2ZR

NOTE: The boiler operating control’s ZC terminal will see the load of the circulator(s).

FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY

THERMOSTATS

ZONE 4

ONOFF

PRIORITY

120V RELAY

FUSE 1 AMP

24 VACPOWER

ZONE 1 ZONE 2 ZONE 3 ZONE 4

120 VOLT CIRCULATORSZC ZR

X XEND

SWITCH

ZONE1 ZONE2 ZONE3 ZONE4 POWER

INPUT

SR 504

ZONE 2

POWERZONE 1

ZONE 3ZONE 4

L1 L2 T T


CIRCULATORON BOILER

(IF ATTACHED)

B2

C1

B1ZR

HONEYWELL L8124OR EQUAL

120 VAC INPUT

C2

ZC

THERMOSTAT

L1 L2

(NEUTRAL)(HOT)

CIRCUITBREAKER

CUSTOMEREMERGENCY

SWITCH

THERMALFUSE

(FIROMATIC)

SERVICESWITCH

LOWWATERCUTOFF

4

5

SR502/503 Switching Relay Controlling Another SR502/503 Switching Relay

SR 503

24 VACPOWER

FUSE 1 AMP

ZONE1 ZONE2 ZONE3

120 VOLT CIRCULATORS

ZONE1 ZONE2 ZONE3

TO: "TT" ON AQUASTAT CONTROL

JUMPERN P ZC H X ZR1

X2

ZONE 2

POWERZONE 1

ZONE 3

THREE ZONE SWITCHING RELAYWITH OPTIONAL PRIORITY

TT T

SR 503 ZONE1 ZONE2 ZONE3

24 VACPOWER

FUSE 1 AMP

120 VOLTCIRCULATORS

ZONE1 ZONE2 ZONE3

120 VAC POWER

JUMPERN P ZC H X ZR1

X2


TA T

BOILER

H

N

SLAVE

MASTER

AQUASTATON DHWHEATER

ZONE 2

POWERZONE 1

ZONE 3

DHWHEATER

CIRCULATOR

PRIORITY ONVIA JUMPERPLACEMENT

PRIORITY OFFVIA JUMPERPLACEMENT

6

SR502/503 Switching Relay Controlling Another SR504/506 Switching Relay

SIX ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY

ZONE 6

ON

OFF

PRIORITY

120V RELAY


X XEND

SWITCH

POWERINPUT

120 VAC INPUT

TO: "TT" ON BOILER

ZONE1 ZONE2

ZONE3

ZONE4 ZONE5 ZONE6

ZONE1 ZONE2 ZONE3 ZONE4 ZONE5 ZONE6

FUSE 1 AMP

24 VACPOWER

SR 506

ZONE 2

POWERZONE 1

ZONE 3ZONE 4

ZONE 5ZONE 6

THERMOSTATS

BOILER

H

N


24 VACPOWER

FUSE 1 AMP

120 VOLTCIRCULATORS

ZONE1 ZONE2 ZONE3JUMPERS

N P ZC H X ZR1

X2


TA T

MASTER

ZONE 2

POWERZONE 1

ZONE 3

SLAVET

PRIORITY ONVIA JUMPER PLACEMENT

REMOVEJUMPER

PRIORITYOFF


7

Two SR504/506 Switching Relays Connected Together

BOILER

H

N

AAQUASTAT ONDHW HEATER

TT T


ZONE 4

ONOFF

PRIORITY

120V RELAY

FUSE 1 AMP

24 VAC

POWER


120 VAC INPUT


X XEND

SWITCH


INPUT

SR 504

ZONE 2

POWERZONE 1

ZONE 3ZONE 4

JUMPER

TT T


ZONE 4

ONOFF

PRIORITY

120V RELAY

FUSE 1 AMP

24 VACPOWER


120 VAC INPUT

TO: "TT" ON BOILER


X XEND

SWITCH


INPUT

SR 504

ZONE 2

POWERZONE 1

ZONE 3ZONE 4

JUMPER

DHWHEATER

CIRCULATOR

OUTPUTNOTUSED

PRIORITYON

PRIORITYON

8

Priority Zoning Circulator Controlling SR504/506 Switching Relay


ZONE 6

ON

OFF

PRIORITY

120V RELAY


X XEND

SWITCH

POWERINPUT

120 VAC INPUT

TO: "TT" ON BOILER

ZONE1 ZONE2

ZONE3

ZONE4 ZONE5 ZONE6


FUSE 1 AMP

24 VACPOWER

SR 506

ZONE 2

POWERZONE 1

ZONE 3ZONE 4

ZONE 5ZONE 6

ONOFF

PRIORITY

POWER IN

120 VAC INPUT

THERMOSTAT BOILER PRIORITY

PRIORITY ZONING CIRCULATOR

PR-IN PR-OUT LIVE NEUT1 2 3 4

THERMOSTATS

BOILER

H

N

A

AQUASTAT ONDHW HEATER

MASTER

SLAVE

PRIORITYON

REMOVEJUMPER

PRIORITYOFF

T

9

Prio

rity

Zoni

ng C

ircul

ator

Con

trolli

ng 2

SR5

04/5

06 S

witc

hing

Rel

ays

ZO

NE

4 ON

OFF

PRIO

RITY

120V

REL

AY

FUSE

1 A

MP

ZO

NE

1Z

ON

E 2

ZO

NE

3Z

ON

E 4

120

VOLT

CIR

CU

LATO

RSZ

C

ZR

X

XEN

DSW

ITC

H

ZO

NE1

Z

ON

E2

ZO

NE3

Z

ON

E4PO

WER

INPU

T

SR 5

04

ZO

NE

2

POW

ERZ

ON

E 1

ZO

NE

3Z

ON

E 4

TT

T

BO

ILE

R

ZO

NE

4 ON

OFF

PRIO

RITY

120V

REL

AY

FUSE

1 A

MP

24 VACPOWER

ZO

NE

1Z

ON

E 2

ZO

NE

3Z

ON

E 4

120

VAC

INPU

T

TO:

"TT"

ON

BO

ILER

120

VOLT

CIR

CU

LATO

RSZ

C

ZR

X

XEN

DSW

ITC

H

ZO

NE1

Z

ON

E2

ZO

NE3

Z

ON

E4PO

WER

INPU

T

SR 5

04

ZO

NE

2

POW

ERZ

ON

E 1

ZO

NE

3Z

ON

E 4

TT

T

H N

FOU

R Z

ON

E SW

ITC

HIN

G R

ELA

YW

ITH

OPT

ION

AL

PRIO

RITY

FOU

R Z

ON

E SW

ITC

HIN

G R

ELA

YW

ITH

OPT

ION

AL

PRIO

RITY

SL

AV

ES

LA

VE

PRIO

RITY

OFF

PRIO

RITY

OFF

TT

24 VACPOWER

ON

OFF

PRIO

RITY

POW

ER IN

TH

ERM

OST

AT

BO

ILER

PR

IORI

TY

PRIO

RITY

ZO

NIN

G C

IRC

ULA

TOR

PR-IN

PR-O

UT

LIVE

NEU

T1

23

4

AA

QU

AST

AT

ON

DH

W H

EATE

R

120

VAC

INPU

T

MA

ST

ER

PRIO

RITY

ON

REM

OVE

JUM

PER

REM

OVE

JUM

PER

SR50

2/50

3 Sw

itchi

ng R

elay

Con

trolli

ng 2

SR5

04/5

06 S

witc

hing

Rel

ays

ZO

NE

4 ON

OFF

PRIO

RITY

120V

REL

AY

FUSE

1 A

MP

ZO

NE

1Z

ON

E 2

ZO

NE

3Z

ON

E 4

120

VOLT

CIR

CU

LATO

RSZ

C

ZR

X

XEN

DSW

ITC

H

ZO

NE1

Z

ON

E2

ZO

NE3

Z

ON

E4PO

WER

INPU

T

SR 5

04

ZO

NE

2

POW

ERZ

ON

E 1

ZO

NE

3Z

ON

E 4

TT

T

BO

ILE

R

ZO

NE

4 ON

OFF

PRIO

RITY

120V

REL

AY

FUSE

1 A

MP

24 VACPOWER

ZO

NE

1Z

ON

E 2

ZO

NE

3Z

ON

E 4

120

VAC

INPU

T

TO:

"TT"

ON

BO

ILER

120

VOLT

CIR

CU

LATO

RSZ

C

ZR

X

XEN

DSW

ITC

H

ZO

NE1

Z

ON

E2

ZO

NE3

Z

ON

E4PO

WER

INPU

T

SR 5

04

ZO

NE

2

POW

ERZ

ON

E 1

ZO

NE

3Z

ON

E 4

TT

T

H N

A

SR 5

03

ZO

NE1

Z

ON

E2

ZO

NE3

24 V

AC

POW

ER

FUSE

1 A

MP

ZO

NE1

Z

ON

E2

ZO

NE3

JUM

PER

N

P

ZC

H

X

ZR

1

X2

ZO

NE

2

POW

ERZ

ON

E 1

TWO

ZO

NE

SWIT

CH

ING

REL

AY

WIT

H O

PTIO

NA

L PR

IORI

TY

PRIO

RITY

ON

FOU

R Z

ON

E SW

ITC

HIN

G R

ELA

YW

ITH

OPT

ION

AL

PRIO

RITY

FOU

R Z

ON

E SW

ITC

HIN

G R

ELA

YW

ITH

OPT

ION

AL

PRIO

RITY

MA

ST

ER

SL

AV

ES

LA

VE

PRIO

RITY

OFF

PRIO

RITY

OFF

TT

TT

24 VACPOWER

ZO

NE

3

REM

OVE

JUM

PER

REM

OVE

JUM

PER

AQ

UA

STA

T O

ND

HW

HEA

TER

10

11

FOU

R Z

ON

E SW

ITC

HIN

G R

ELAY

WIT

H O

PTIO

NA

L PR

IORI

TY

ZO

NE

4

ON

OFF

PRIO

RITY

120V

REL

AY

FUSE

1 A

MP

ZO

NE

1Z

ON

E 2

ZO

NE

3Z

ON

E 4

120

VOLT

CIR

CU

LATO

RSZ

C

ZR

X

XEN

DSW

ITC

H

ZO

NE1

Z

ON

E2

ZO

NE3

Z

ON

E4PO

WER

INPU

T

SR 5

04

ZO

NE

2

POW

ERZ

ON

E 1

ZO

NE

3Z

ON

E 4

TT

T

BO

ILE

R

FOU

R Z

ON

E SW

ITC

HIN

G R

ELAY

WIT

H O

PTIO

NA

L PR

IORI

TY

ZO

NE

4

ON

OFF

PRIO

RITY

120V

REL

AY

FUSE

1 A

MP

ZO

NE

1Z

ON

E 2

ZO

NE

3Z

ON

E 4

120

VAC

INPU

T

TO:

"TT"

ON

BO

ILER

120

VOLT

CIR

CU

LATO

RSZ

C

ZR

X

XEN

DSW

ITC

H

ZO

NE1

Z

ON

E2

ZO

NE3

Z

ON

E4PO

WER

INPU

T

SR 5

04

ZO

NE

2

POW

ERZ

ON

E 1

ZO

NE

3Z

ON

E 4

TT

T

H N

T

DH

WC

IRC

ULA

TORJUM

PER

RW

TT

CO

M

24 VAC

N/O

N

/C

N/C

N

/ON

H3

44

56

6

SR50

1PO

WER

T S

TAT

120

VAC

INPU

T

1 Z

ON

E SW

ITC

HIN

G R

ELA

Y

AQ

UA

STA

T O

N

DH

W H

EATE

RA

T

MA

ST

ER

SL

AV

ES

LA

VE

REM

OVE

JUM

PER

REM

OVE

JUM

PER

PRIO

RITY

OFF

PRIO

RITY

OFF

24 V

AC

POW

ER24

VA

CPO

WER

SR50

1 Sw

itchi

ng R

elay

Con

trolli

ng 2

SR5

04/5

06 S

witc

hing

Rel

ays

SR501-EXP Switching Relay Controlling Another SR504/506 Switching Relay


ZONE 6

ON

OFF

PRIORITY

120V RELAY


X XEND

SWITCH

POWERINPUT

120 VAC INPUT

TO: "TT" ON BOILER

ZONE1 ZONE2

ZONE3

ZONE4 ZONE5 ZONE6


FUSE 1 AMP

24 VACPOWER

SR 506

ZONE 2

POWERZONE 1

ZONE 3ZONE 4

ZONE 5ZONE 6

THERMOSTATS

BOILER

H

N

MASTER

SLAVET

REMOVEJUMPER

PRIORITYOFF

DHW CIRCULATOR

POWER

T STAT

TO: "TT" ON BOILER


N ZC ZRH H HPOWERINPUT

120VACINPUT

120VACOUTPUT

CIRCOUTPUT

PRIORITYOUTPUT

RESETPOWER

CONTROLS

FUSE1 AMP

NORMAL

MASTER

SLAVE

ENDSWITCH

ZONEVALVETHERMOSTATEXPANSION

X COMT/WT/RX 1 12 243

JUMPER

TO: OPTIONAL ZONE VALVE OR iSeries MIXING VALVE

MODE

FUSE5 AMP

SR 501-EXP

A

12

SR50

1-EX

P Sw

itchi

ng R

elay

Con

trolli

ng a

ZVC

404/

406

Zone

Val

ve C

ontro

l

24 V

AC

ZO

NE

1Z

ON

E 2

ZO

NE

3Z

ON

E 4

ZO

NE

5Z

ON

E 6

MO

DE

NO

RMA

LRE

SET FUSE (7 AMP MAX)

TT

TT

TT

TT

TT

TT

ZO

NE

6 PR

IORI

TY

OFF

ON

ZVC

40

6

12

34

12

34

12

34

12

34

12

34

ZO

NE

1Z

ON

E 2

ZO

NE

3Z

ON

E 4

ZO

NE

5

2 W

IRE

ZO

NE

VALV

E(N

O E

ND

SW

ITC

H)

JUM

PER

3 &

4

TAC

O3

WIR

E Z

ON

E V

ALV

E

1 2 3

MO

TOR

END

SWIT

CH

THER

MO

STA

TTH

ERM

OST

AT

THER

MO

STA

T

4 W

IRE

ZO

NE

VALV

E(P

OW

ER O

PEN

, SEL

F C

LOSI

NG

)

T ST

AT

1

VALV

E 1

T ST

AT

2

VALV

E 2

T ST

AT

3VA

LVE

3T

STA

T 4

VALV

E 4

T ST

AT

5VA

LVE

5T

STA

T 6

VALV

E 6

POW

ER

SIX

ZO

NE

ZO

NE

VALV

E C

ON

TRO

LW

ITH

OPT

ION

AL

PRIO

RITY

24

VAC

FACTORYINSTALLED

TRANSFORMER

120

VA

CIN

PUT

WH

ITE

BLA

CK

POWER IN

24

VAC

FACTORYINSTALLED

TRANSFORMER

120

VA

CIN

PUT

WH

ITE

BLA

CK

N/O

CO

MZ

ON

E 6

RELA

YEN

DSW

ITC

H

EXTR

AEN

DSW

ITC

H

MA

INN

/C

TO B

OIL

ER A

QU

AST

AT

RELA

Y

BO

ILE

RHN

SYST

EMPU

MP

BOIL

ER T

URN

S O

N W

HEN

AN

Y Z

ON

E VA

LVE

OPE

NS.

12

34

ZO

NE

6

PRIO

RITY

ZO

NE

JUM

PER

3 &

4S

EE

NO

TE

Not

e: W

hen

a ci

rcul

ator

is u

sed

on t

hepr

iorit

y zo

ne in

stea

d of

a z

one

valv

e,ju

mpe

r 3

and

4 of

the

prio

rity

zone

.

TT

T

120

VAC

INPU

T

DH

WH

EATE

RC

IRC

ULA

TOR

POW

ER

T S

TAT

AQ

UA

STA

T O

ND

HW

HEA

TER

NZ

CZ

RH

HH

PO

WE

RIN

PU

T12

0VAC

INPU

T12

0VAC

OUTP

UTCI

RCOU

TPUT

PRIO

RITY

OUTP

UT

RESE

TPO

WER

CONT

ROLS

FUSE

1 AM

P

NORM

AL

MAS

TER

SLAV

E

END

SWIT

CHZO

NEVA

LVE

THER

MO

STAT

EXPA

NSIO

N

XCO

MT/

WT/

RX

11

22

43

JUM

PER

TO: O

PTIO

NA

L Z

ON

E VA

LVE

OR

iSer

ies

MIX

ING

VA

LVE

MOD

E

FUSE

5 AM

PSR 5

01-E

XP

ATO

BO

ILER

AQ

UA

STA

T RE

LAY

MA

ST

ER

SL

AV

E

SYST

EM P

UM

P TU

RNS

ON

WH

EN A

NY

ZO

NE

VALV

E O

PEN

SEX

CEP

T W

HEN

TH

E D

HW

HEA

TER

(SR5

01-E

XP)

CA

LLS.

13

14

2 Expandable Switching Relays Connected Together


ZONE 4

ONOFF

PRIORITY

120V RELAY

FUSE 1 AMP

24 VAC

POWER

24 VAC

POWER

MASTER

PLUG-IN CARDS

RESET NORMAL

SLAVE

POWERCONTROLINTERFACE


THERMOSTATS


120 VAC INPUT


X XEND

SWITCH


INPUT

SR 504-EXP

ZONE 2

POWERZONE 1

ZONE 3ZONE 4

JUMPER

BOILER

SWITCH SETTINGS

Master/Slave: SlaveReset/Normal: NormalPriority Zone: Off

120 VAC INPUT

H

N

SWITCH SETTINGSMaster/Slave: MasterReset/Normal: NormalPriority Zone: On

1 2 3 4EXPANSION

1 2 3 4EXPANSION

SR504-EXP


ZONE 6

ONOFF

PRIORITY

120V RELAY

PLUG-IN CARDS

FUSE 1 AMP

SLAVE

MASTER

RESET NORMAL


X XEND

SWITCH

POWERINPUT

TO: "TT" ON BOILER

ZONE1 ZONE2

ZONE3

ZONE4 ZONE5 ZONE6


SR 506-EXP

ZONE 2

POWERZONE 1

ZONE 3ZONE 4ZONE 5ZONE 6

JUMPER

DHWCIRCULATOR

THERMOSTATS

SLAVE

MASTER A


T

T

ZO

NE

4 ON

OFF

PRIO

RITY

120V

REL

AY

FUSE

1 A

MP

24 V

AC

POW

ER

ZO

NE

1Z

ON

E 2

ZO

NE

3Z

ON

E 4

120

VOLT

CIR

CU

LATO

RSZ

C

ZR

X

XEN

DSW

ITC

H

ZO

NE1

Z

ON

E2

ZO

NE3

Z

ON

E4PO

WER

INPU

T

SR 5

04

ZO

NE

2

POW

ERZ

ON

E 1

ZO

NE

3Z

ON

E 4

TT

T

BO

ILE

R

ZO

NE

4 ON

OFF

PRIO

RITY

120V

REL

AY

FUSE

1 A

MP

24 V

AC

POW

ER

ZO

NE

1Z

ON

E 2

ZO

NE

3Z

ON

E 4

120

VAC

INPU

T

TO:

"TT"

ON

BO

ILER

120

VOLT

CIR

CU

LATO

RSZ

C

ZR

X

XEN

DSW

ITC

H

ZO

NE1

Z

ON

E2

ZO

NE3

Z

ON

E4PO

WER

INPU

T

SR 5

04

ZO

NE

2

POW

ERZ

ON

E 1

ZO

NE

3Z

ON

E 4

TT

T

H N

A

JUM

PER

JUM

PER

SR 5

02

ZO

NE1

Z

ON

E2

ZO

NE3

24 V

AC

POW

ER

FUSE

1 A

MP

ZO

NE1

Z

ON

E2

ZO

NE3

JUM

PERS

N

P

ZC

H

X

ZR

1

X2

ZO

NE

2

POW

ERZ

ON

E 1

TWO

ZO

NE

SWIT

CH

ING

REL

AY

WIT

H O

PTIO

NA

L PR

IORI

TY

A

PRIO

RITY

OFF

FOU

R Z

ON

E SW

ITC

HIN

G R

ELA

YW

ITH

OPT

ION

AL

PRIO

RITY

FOU

R Z

ON

E SW

ITC

HIN

G R

ELA

YW

ITH

OPT

ION

AL

PRIO

RITY

ZO

NE

NO

TU

SED

ZO

NE

NO

TU

SED

MA

ST

ER

SL

AV

ES

LA

VE

PRIO

RITY

ON

PRIO

RITY

ON

AQ

UA

STA

TS O

ND

HW

HEA

TERS

15

2 In

dire

ct W

ater

Hea

ters

with

Prio

rity

Conn

ecte

d to

Sta

ndar

d Sw

itchi

ng R

elay

s

16

BO

ILE

R

120

VAC

INPU

T

TO:

"TT"

ON

BO

ILER

H N

A

SR 5

02

ZO

NE1

Z

ON

E2

ZO

NE3

24 V

AC

POW

ER

FUSE

1 A

MP

ZO

NE1

Z

ON

E2

ZO

NE3

JUM

PERS

N

P

ZC

H

X

ZR

1

X2

ZO

NE

2

POW

ERZ

ON

E 1

TWO

ZO

NE

SWIT

CH

ING

REL

AY

WIT

H O

PTIO

NA

L PR

IORI

TY

A

PRIO

RITY

OFF

12

34

EXPA

NSI

ON

FOU

R Z

ON

E SW

ITC

HIN

G R

ELA

Y W

ITH

OPT

ION

AL

PRIO

RITY

ZO

NE

4 ON

OFF

PRIO

RITY

120V

REL

AY

FUSE

1 A

MP

24 V

AC

POW

ER

MA

STER

PLU

G-I

N C

ARD

S

RESE

T N

ORM

AL

SLAV

E

POW

ERC

ON

TRO

LIN

TERF

AC

E

ZO

NE

1Z

ON

E 2

ZO

NE

3Z

ON

E 4

120

VOLT

CIR

CU

LATO

RSZ

C

ZR

X

XEN

DSW

ITC

H

ZO

NE1

Z

ON

E2

ZO

NE3

Z

ON

E4PO

WER

INPU

T

SR 5

04-E

XP

ZO

NE

2

POW

ERZ

ON

E 1

ZO

NE

3Z

ON

E 4

JUM

PER

SWIT

CH

SET

TIN

GS

Mas

ter/

Slav

e: M

aste

rRe

set/

Nor

mal

: Nor

mal

Prio

rity

Zon

e: O

n

12

34

EXPA

NSI

ON

SR50

4-EX

P

T

FOU

R Z

ON

E SW

ITC

HIN

G R

ELA

Y W

ITH

OPT

ION

AL

PRIO

RITY

ZO

NE

4 ON

OFF

PRIO

RITY

120V

REL

AY

FUSE

1 A

MP

24 V

AC

POW

ER

MA

STER

PLU

G-I

N C

ARD

S

RESE

T N

ORM

AL

SLAV

E

POW

ERC

ON

TRO

LIN

TERF

AC

E

ZO

NE

1Z

ON

E 2

ZO

NE

3Z

ON

E 4

120

VOLT

CIR

CU

LATO

RSZ

C

ZR

X

XEN

DSW

ITC

H

ZO

NE1

Z

ON

E2

ZO

NE3

Z

ON

E4PO

WER

INPU

T

SR 5

04-E

XP

ZO

NE

2

POW

ERZ

ON

E 1

ZO

NE

3Z

ON

E 4

JUM

PER

SWIT

CH

SET

TIN

GS

Mas

ter/

Slav

e: S

lave

Rese

t/N

orm

al: N

orm

alPr

iorit

y Z

one:

Off

SR50

4-EX

P

T

DH

WC

IRC

ULA

TORS

AQ

UA

STA

TS O

ND

HW

HEA

TERS

MA

ST

ER

SL

AV

E

ZO

NE

NO

TU

SED

2 In

dire

ct W

ater

Hea

ters

with

Prio

rity

Conn

ecte

d to

EXP

Swi

tchi

ng R

elay

s

PC700 Boiler Reset Control Connected to SR501-EXP Switching Relay

ZONECONTROL

BOILSEN

OUTSEN

BOILER SENSOR

OUTDOORSENSOR

PC700

BOILER

SWITCH SETTINGSMaster/Slave: MasterReset/Normal: Reset

120 VAC INPUT

SYSTEMCIRCULATOR

POWER

T STAT

TO: "TT" ON BOILER

THERMOSTAT


120VACINPUT

120VACOUTPUT

CIRCOUTPUT

PRIORITYOUTPUT

RESETPOWER

CONTROLS

FUSE1 AMP

NORMAL

MASTER

SLAVE

ENDSWITCH

ZONEVALVETHERMOSTATEXPANSION


JUMPER

TO: OPTIONAL ZONE VALVE OR iSeries MIXING VALVE

MODE

FUSE5 AMP

SR 501-EXP

H

N

T

17


ZONE 4

ONOFF

PRIORITY

120V RELAY


X XEND

SWITCH

POWERINPUT

120 VACINPUT

ZONE1 ZONE2

ZONE3

ZONE4

ZONE1 ZONE2 ZONE3 ZONE4

FUSE 1 AMP

24 V

AC

POW

ER

SR 504

ZONE 2

POWERZONE 1

ZONE 3ZONE 4

THERMOSTATS

BOILER

H

N

MASTER

EXISTINGZONECONTROL

T

PRIMARYSYSTEM

CIRCULATOR(Optional)

POWERT STAT

TO: "TT" ON BOILER



120VACINPUT

120VACOUTPUT

CIRCOUTPUT

PRIORITYOUTPUT

ENDSWITCH

RESETOVERRIDETHERMOSTATEXPANSION


JUMPER

SR 501-EXP

A

RESET

POWERCONTROLS

FUSE1 AMP

NORMALMASTER

SLAVE

MODE

FUSE5 AMP

JUMPER

DHWHEATER

CIRCULATOR

Note: If Zone Control comes on without a call for heat,reverse Reset Override input (1 & 2) wires on SR501-EXP.

ZONECONTROL

BOILSEN

OUTSEN

BOILER SENSOR

OUTDOORSENSOR

PC700

K1-A

K1-B K2-A K2-A

K1 K2

18

SR501-EXP and PC700 Boiler Reset Control Connected to an Existing Switching Relay


ZONE 4

ONOFF

PRIORITY

120V RELAY


X XEND

SWITCH

POWERINPUT

120 VACINPUT

ZONE1 ZONE2

ZONE3

ZONE4


FUSE 1 AMP

24 V

AC

POW

ER

SR 504

ZONE 2

POWERZONE 1

ZONE 3ZONE 4

THERMOSTATS

BOILER

H

N

MASTEREXISTINGZONECONTROL

T

POWERT STAT

TO: "TT" ON BOILER


ENDSWITCH



JUMPER

A

RESET

POWERCONTROLS

FUSE1 AMP

NORMAL

MODE

REMOVEJUMPERDHW

HEATERCIRCULATOR

ZONECONTROL

BOILSEN

OUTSEN

BOILER SENSOR

OUTDOORSENSOR

PC700

SLAVE


120VACINPUT

120VACOUTPUT

CIRCOUTPUT

PRIORITYOUTPUT

SR 501-EXPMASTER

SLAVE

FUSE5 AMP

K1-A

K1-B K2-A K2-A

K1 K2

Connecting a DHW Heater to an Existing Heating Only Switching RelayUsing an SR501-EXP and PC700 Boiler Reset Control

SR501-EXP and PC700 Boiler Reset Control Connected to an Existing Zone Valve Control

120 VACINPUT

BOILER

H

N

EXISTINGZONECONTROL

PRIMARYSYSTEM


POWERT STAT

TO: "TT" ON BOILER

ENDSWITCH



JUMPER

RESET

POWERCONTROLS

FUSE1 AMP

NORMAL

MODE

DHW HEATERCIRCULATOR

Note: If Zone Control comes on without a call for heat,reverse Reset Override input (1 & 2) wires on SR501-EXP.

ZONECONTROL

BOILSEN

OUTSEN

BOILER SENSOR

OUTDOORSENSOR

PC700

24 VAC

POWER IN


MODENORMAL RESET

FUSE

(3 AM

P MA

X)

ZONE 1T T T T T T T T

ZONE 4PRIORITY

OFF

ON

N/O COM N/CZONE 4 RELAY 1 2 3 4 1 2 3 4

ZONE 1 ZONE 2

2 WIRE ZONE VALVE(NO END SWITCH)

JUMPER3 & 4

TACO3 WIRE ZONE VALVE

123

1 2 3 4ZONE 3

MOTOR ENDSWITCH

4 WIRE ZONE VALVE(POWER OPEN,SELF CLOSING)

T STAT 1VALVE 1T STAT 2VALVE 2T STAT 3VALVE 3T STAT 4VALVE 4POWER

ENDSWITCH

EXTRAEND

SWITCH

MAIN

24VAC

FA

CTO

RYIN

STA

LLED

TRA

NSF

ORM

ER

120 VACINPUT

WHITE

BLACK

ZVC 404 FOUR ZONE ZONE VALVE CONTROL

WITH OPTIONAL PRIORITY

1 2 3 4ZONE 4

PRIORITYZONE

JUMPER3 & 4 SEE NOTE

THERMOSTATS

T TT

Note: When a circulator is used on thepriority zone instead of a zone valve,jumper 3 and 4 of the priority zone.

AQUASTAT ONDHW HEATERA

ZONE VALVE SYSTEMCIRCULATOR


120VACINPUT

120VACOUTPUT

CIRCOUTPUT

PRIORITYOUTPUT

SR 501-EXPMASTER

SLAVE

FUSE5 AMP

K1-A

K1-B K2-A K2-A

K1 K2

Connecting a DHW Heater to an Existing Heating Only Zone Valve ControlUsing an SR501-EXP and PC700 Boiler Reset Control

120 VACINPUT

BOILER

H

N

EXISTINGZONECONTROL

DHW HEATERCIRCULATOR

POWERT STAT

TO: "TT" ON BOILER

ENDSWITCH



JUMPER

RESET

POWERCONTROLS

FUSE1 AMP

NORMAL

MODE

ZONECONTROL

BOILSEN

OUTSEN

BOILER SENSOR

OUTDOORSENSOR

PC700

24 VAC

POWER IN


MODENORMAL RESET

FUSE

(3 AM

P MA

X)


ZONE 4PRIORITY

OFF

ON


ZONE 1 ZONE 2


JUMPER3 & 4


123

1 2 3 4ZONE 3

MOTOR ENDSWITCH



ENDSWITCH

EXTRAEND

SWITCH

MAIN

24VAC

FA

CTO

RYIN

STA

LLED

TRA

NSF

ORM

ER

120 VACINPUT

WHITE

BLACK



1 2 3 4ZONE 4

PRIORITYZONE


THERMOSTATS

T TT


AQUASTAT ONDHW HEATERA

ZONE VALVE SYSTEMCIRCULATOR

MASTER

SLAVE


120VACINPUT

120VACOUTPUT

CIRCOUTPUT

PRIORITYOUTPUT

SR 501-EXPMASTER

SLAVE

FUSE5 AMP

K1-A

K1-B K2-A K2-A

K1 K2

19

SR501-EXP and PC700 Boiler Reset Control Connected to an ExistingTankless Coil Boiler – Zoning with Circulators


ZONE 4

ONOFF

PRIORITY

120V RELAY


X XEND

SWITCH

POWERINPUT

120 VACINPUT

ZONE1 ZONE2

ZONE3

ZONE4


FUSE 1 AMP

24 V

AC

POW

ER

SR 504

ZONE 2

POWERZONE 1

ZONE 3ZONE 4

THERMOSTATS

BOILERH

N

EXISTINGZONECONTROL

T

POWERT STAT

TO: "ZR" ON BOILER CONTROL

ENDSWITCH



JUMPER

RESET

POWERCONTROLS

FUSE1 AMP

NORMAL

MODE

REMOVEJUMPER

PRIMARYSYSTEM


ZONECONTROL

BOILSEN

OUTSEN

BOILER SENSOR

OUTDOORSENSOR

PC700

Boiler and Zone Control(s) need to be on same power supply (same circuit breaker).

TO: "ZC" ON BOILER CONTROL


120VACINPUT

120VACOUTPUT

CIRCOUTPUT

PRIORITYOUTPUT

SR 501-EXPMASTER

SLAVE

FUSE5 AMP

K1-A

K1-B K2-A K2-A

K1 K2

SR501-EXP and PC700 Boiler Reset Control Connected to an ExistingTankless Coil Boiler – Zoning with Zone Valves

120 VACINPUT

BOILER H

N

EXISTINGZONECONTROL

POWERT STAT

ENDSWITCH



JUMPER

RESET

POWERCONTROLS

FUSE1 AMP

NORMAL

MODE

ZONECONTROL

BOILSEN

OUTSEN

BOILER SENSOR

OUTDOORSENSOR

PC700

Boiler and Zone Control(s) need to be on same power supply (same circuit breaker).

24 VAC

POWER IN


MODENORMAL RESET

FUSE

(3 AM

P MA

X)


ZONE 4PRIORITY

OFF

ON


ZONE 1 ZONE 2


JUMPER3 & 4


123

1 2 3 4ZONE 3

MOTOR ENDSWITCH



ENDSWITCH

EXTRAEND

SWITCH

MAIN

24VAC

FA

CTO

RYIN

STA

LLED

TRA

NSF

ORM

ER

120 VACINPUT

WHITE

BLACK



1 2 3 4ZONE 4

PRIORITYZONE


THERMOSTATS

T TT

Note: When a circulator is used on thepriority zone instead of a zone valve,jumper 3 and 4 of the priority zone.ZONE VALVE SYSTEM

CIRCULATOR

MASTER

SLAVE

TO: "ZR" ON BOILER CONTROL

PRIMARYSYSTEM


TO: "ZC" ON BOILER CONTROL


120VACINPUT

120VACOUTPUT

CIRCOUTPUT

PRIORITYOUTPUT

SR 501-EXPMASTER

SLAVE

FUSE5 AMP

K1-A

K1-B K2-A K2-A

K1 K2

20

FOU

R Z

ON

E SW

ITC

HIN

G R

ELA

Y W

ITH

OPT

ION

AL

PRIO

RITY

ZO

NE

4 ON

OFF

PRIO

RITY

120V

REL

AY

FUSE

1 A

MP

24 V

AC

POW

ER

MA

STER

1234

PLU

G-I

N C

ARD

S

RESE

T N

ORM

AL

SLAV

E

POW

ERC

ON

TRO

LIN

TERF

AC

E

THER

MO

STAT

S

ZO

NE

1Z

ON

E 2

ZO

NE

3Z

ON

E 4

120

VAC

INPU

T

TO:

"TT"

ON

BO

ILER

120

VOLT

CIR

CU

LATO

RSZ

C

ZR

X

XEN

DSW

ITC

H

ZO

NE1

Z

ON

E2

ZO

NE3

Z

ON

E4PO

WER

INPU

T

ZO

NE

2

POW

ERZ

ON

E 1

ZO

NE

3Z

ON

E 4

JUM

PER

H N

ZONE

CONT

ROL

BOIL

SEN

OUT

SEN B

OIL

ER

SE

NS

OR

OU

TD

OO

RS

EN

SO

R

PC

700

BO

ILE

R

SWIT

CH

SET

TIN

GS

Mas

ter/

Slav

e: M

aste

rRe

set/

Nor

mal

: Res

etPr

iorit

y Z

one:

On

or O

ff

SR 5

04-E

XP

T

21

PC70

0 Bo

iler R

eset

Con

trol C

onne

cted

to E

XP S

witc

hing

Rel

ay

22

FOU

R Z

ON

E SW

ITC

HIN

G R

ELA

Y W

ITH

OPT

ION

AL

PRIO

RITY

ZO

NE

4 ON

OFF

PRIO

RITY

120V

REL

AY

FUSE

1 A

MP

24 V

AC

POW

ER

MA

STER

1234

PLU

G-I

N C

ARD

S

RESE

T N

ORM

AL

SLAV

E

POW

ERC

ON

TRO

LIN

TERF

AC

E

THER

MO

STAT

S

ZO

NE

1Z

ON

E 2

ZO

NE

3Z

ON

E 4

120

VAC

INPU

T

120

VOLT

CIR

CU

LATO

RSZ

C

ZR

X

XEN

DSW

ITC

H

ZO

NE1

Z

ON

E2

ZO

NE3

Z

ON

E4PO

WER

INPU

T

ZO

NE

2

POW

ERZ

ON

E 1

ZO

NE

3Z

ON

E 4

JUM

PER

H N

ZONE

CONT

ROL

BOIL

SEN

OUT

SEN BO

ILE

R S

EN

SO

R

OU

TD

OO

RS

EN

SO

R

PC

702

STAG

E1

STAG

E2

BO

ILE

R#2

BO

ILE

R#1

DH

WD

EM

AN

DSW

ITC

H S

ETTI

NG

S

Mas

ter/

Slav

e: M

aste

rRe

set/

Nor

mal

: Nor

mal

Prio

rity

Zon

e: O

n or

Off

SR 5

04-E

XP

WIR

ING

NEE

DED

ON

LY IF

PRIO

RITY

ZO

NE

IS D

HW

SYST

EMC

IRC

ULA

TOR

(OPT

ION

AL)

T

PC70

2 2–

Stag

e Bo

iler R

eset

Con

trol C

onne

cted

to E

XP S

witc

hing

Rel

ay

FOU

R Z

ON

E SW

ITC

HIN

G R

ELA

Y W

ITH

OPT

ION

AL

PRIO

RITY

ZO

NE

4 ON

OFF

PRIO

RITY

120V

REL

AY

FUSE

1 A

MP

24 V

AC

POW

ER

MA

STER

1234

PLU

G-I

N C

ARD

S

RESE

T N

ORM

AL

SLAV

E

THER

MO

STAT

S

ZO

NE

1Z

ON

E 2

ZO

NE

3Z

ON

E 4

120

VAC

INPU

T

TO:

"TT"

ON

BO

ILER

120

VOLT

CIR

CU

LATO

RSZ

C

ZR

X

XEN

DSW

ITC

H

ZO

NE1

Z

ON

E2

ZO

NE3

Z

ON

E4PO

WER

INPU

T

ZO

NE

2

POW

ERZ

ON

E 1

ZO

NE

3Z

ON

E 4

JUM

PER

HN

BO

ILE

R

SWIT

CH

SET

TIN

GS

Mas

ter/

Slav

e: M

aste

rRe

set/

Nor

mal

: Res

etPr

iorit

y Z

one:

On

or O

ff

ZONE

CONT

ROL

BOIL

SEN

OUT

SEN

BO

ILE

R S

EN

SO

R

OU

TD

OO

RS

EN

SO

R

PC

705-

2

SUP

SEN

SU

PP

LY S

EN

SO

R

INJE

CTI

ON

CIR

CU

LATO

R

SYST

EMC

IRC

ULA

TOR

AN

D/O

R BO

ILER

BLA

CK

BLU

E

RED

GRE

EN/G

ROU

ND

SR 5

04-E

XP

(SEE

NO

TE B

)

NO

TE A

:W

HEN

SYS

TEM

CIR

CU

LATO

R IS

CO

NN

ECTE

D T

O Z

R TE

RMIN

AL

ON

SW

ITC

HIN

G R

ELA

Y, T

HE

MO

DE

SWIT

CH

MU

ST B

E SE

T TO

NO

RMA

L.TH

E PC

705-

2 W

ILL

NO

T RE

SET

THE

BOIL

ER W

HEN

IN T

HE

NO

RMA

L M

OD

E. N

OTE

B:

WH

EN S

YSTE

M C

IRC

ULA

TOR

IS C

ON

NEC

TED

TO

RED

WIR

E O

N P

C70

5-2,

TH

E C

IRC

ULA

TOR

WIL

L O

PERA

TE O

NLY

WH

EN T

HER

MO

STA

T C

ALL

S FO

R H

EAT

AN

D T

HE

OU

TDO

OR

TEM

PERA

TURE

IS B

ELO

W T

HE

WA

RM W

EATH

ER S

HU

T D

OW

N (

WW

SD)

TEM

PERA

TURE

. TH

E W

WSD

CA

N B

E A

DJU

STED

OR

TURN

EDO

FF S

O T

HA

T TH

E C

IRC

ULA

TOR

IS N

OT

AFF

ECTE

D B

Y O

UTD

OO

R TE

MPE

RATU

RE.

SYST

EMC

IRC

ULA

TOR

AN

D/O

R BO

ILER

(SEE

NO

TE A

)

T

23

PC70

5 Va

riabl

e Sp

eed

Pum

p In

ject

ion

Cont

rol C

onne

cted

to E

XP S

witc

hing

Rel

ay

24

PC700 Boiler Reset Control Connected to 2 EXP Switching Relays


ZONE 4

ONOFF

PRIORITY

120V RELAY

FUSE 1 AMP

24 VAC

POWER

MASTER

PLUG-IN CARDS

RESET NORMAL

SLAVE


THERMOSTATS


120 VACINPUT

TO: "TT" ON BOILER


X XEND

SWITCH


INPUT

ZONE 2

POWERZONE 1

ZONE 3ZONE 4

JUMPER

ZONECONTROL

BOILSEN

OUTSEN

BOILER SENSOR

OUTDOORSENSOR

PC700

BOILER

SWITCH SETTINGS

Master/Slave: MasterReset/Normal: ResetPriority Zone: On or Off


ZONE 4

ONOFF

PRIORITY

120V RELAY

FUSE 1 AMP

24 VACPOWER

MASTER

PLUG-IN CARDS

RESET NORMAL

SLAVE


THERMOSTATS


120 VAC INPUT


X XEND

SWITCH


INPUT

ZONE 2

POWERZONE 1

ZONE 3ZONE 4

JUMPER H

N

SWITCH SETTINGS

Master/Slave: SlaveReset/Normal: NormalPriority Zone: No Priority

1 2 3 4EXPANSION

1 2 3 4EXPANSION

SR 504-EXP

SR 504-EXP

MASTER

SLAVE

SYSTEMCIRCULATOR(OPTIONAL)

T

T

25

PC702 2–Stage Boiler Reset Control Connected to 2 EXP Switching Relays


ZONE 4

ONOFF

PRIORITY

120V RELAY

FUSE 1 AMP

24 VAC

POWER

MASTER

PLUG-IN CARDS

RESET NORMAL

SLAVE


THERMOSTATS


120 VAC INPUT


X XEND

SWITCH


INPUT

ZONE 2

POWERZONE 1

ZONE 3ZONE 4

JUMPER

SWITCH SETTINGS

Master/Slave: MasterReset/Normal: NormalPriority Zone: On or Off

1 2 3 4EXPANSION

ZONECONTROL

BOILSEN

OUTSEN

BOILER SENSOR

OUTDOORSENSOR

PC702

STAGE1

STAGE2

BOILER#2

BOILER#1

DHWDEMAND

SR 504-EXP

WIRING NEEDED ONLY IFPRIORITY ZONE IS DHW

MASTER


ZONE 4

ONOFF

PRIORITY

120V RELAY

FUSE 1 AMP

24 VAC

POWER

MASTER

PLUG-IN CARDS

RESET NORMAL

SLAVE


THERMOSTATS


120 VAC INPUT


X XEND

SWITCH


INPUT

ZONE 2

POWERZONE 1

ZONE 3ZONE 4

JUMPERH

N

SWITCH SETTINGS


1 2 3 4EXPANSION

SR 504-EXP

SLAVE


T

T

26

PC705 Variable Speed Pump Injection Control Connected to 2 EXP Switching Relays


ZONE 4

ONOFF

PRIORITY

120V RELAY

FUSE 1 AMP

24 VAC

POWER

MASTER

PLUG-IN CARDS

RESET NORMAL

SLAVE

THERMOSTATS


120 VACINPUT

TO: "TT" ON BOILER


X XEND

SWITCH


INPUT

ZONE 2

POWERZONE 1

ZONE 3ZONE 4

JUMPER

BOILER

SWITCH SETTINGS



ZONE 4

ONOFF

PRIORITY

120V RELAY

FUSE 1 AMP

24 VAC

POWER

MASTER

PLUG-IN CARDS

RESET NORMAL

SLAVE


THERMOSTATS


120 VAC INPUT


X XEND

SWITCH


INPUT

ZONE 2

POWERZONE 1

ZONE 3ZONE 4

JUMPERH

N

SWITCH SETTINGS


1 2 3 4EXPANSION

1 2 3 4EXPANSION

ZONECONTROL

BOILSEN

OUTSEN

BOILER SENSOR

OUTDOORSENSOR

PC705-2

SUPSEN

SUPPLY SENSOR

INJECTIONCIRCULATOR

SYSTEMCIRCULATOR

BLACK

BLUE

RED

GREEN/GROUND

SR 504-EXP

SR 504-EXP

MASTER

SLAVE


(SEE NOTE A ON PAGE 23)

(SEE NOTE BON PAGE 23)

T

T

27

PC700 and PC705 Controls Connected to 2 EXP Switching Relays


ZONE 4

ONOFF

PRIORITY

120V RELAY

FUSE 1 AMP

24 VAC

POWER

MASTER

PLUG-IN CARDS

RESET NORMAL

SLAVE


THERMOSTATS


120 VAC INPUTTO: "TT" ON BOILER


X XEND

SWITCH


INPUT

ZONE 2

POWERZONE 1

ZONE 3ZONE 4

JUMPER

ZONECONTROL

BOILSEN

OUTSEN

BOILER SENSOR

OUTDOORSENSOR

PC700

BOILER

SWITCH SETTINGS



ZONE 4

ONOFF

PRIORITY

120V RELAY

FUSE 1 AMP

24 VAC

POWER

MASTER

PLUG-IN CARDS

RESET NORMAL

SLAVE

THERMOSTATS


120 VAC INPUT


X XEND

SWITCH


INPUT

ZONE 2

POWERZONE 1

ZONE 3ZONE 4

H

N

SWITCH SETTINGS


1 2 3 4EXPANSION

1 2 3 4EXPANSION

ZONECONTROL

BOILSEN

OUTSEN

BOILER SENSOR

OUTDOORSENSOR

PC705-2

SUPSEN

SUPPLY SENSOR

INJECTIONCIRCULATOR

SYSTEMCIRCULATOR

BLACK

BLUE

RED

GREEN/GROUND

SYSTEM CIRCULATOR(OPTIONAL LOCATION)


SR 504-EXP

SR 504-EXP

MASTER

SLAVE

JUMPER

(SEE NOTE BON PAGE 23)

T

T

28

PC702 and PC705 Controls Connected to 2 EXP Switching Relays


ZONE 4

ONOFF

PRIORITY

120V RELAY

FUSE 1 AMP

24 VAC

POWER

MASTER

PLUG-IN CARDS

RESET NORMAL

SLAVE


THERMOSTATS


120 VAC INPUT


X XEND

SWITCH


INPUT

ZONE 2

POWERZONE 1

ZONE 3ZONE 4

JUMPER

SWITCH SETTINGS

Master/Slave: MasterReset/Normal: NormalPriority Zone: On or Off


ZONE 4

ONOFF

PRIORITY

120V RELAY

FUSE 1 AMP

24 VAC

POWER

MASTER

PLUG-IN CARDS

RESET NORMAL

SLAVE

THERMOSTATS


120 VAC INPUT


X XEND

SWITCH


INPUT

ZONE 2

POWERZONE 1

ZONE 3ZONE 4

JUMPER

H

N

SWITCH SETTINGS


1 2 3 4EXPANSION

1 2 3 4EXPANSION

ZONECONTROL

BOILSEN

OUTSEN

BOILER SENSOR

OUTDOORSENSOR

PC705-2

SUPSEN

SUPPLY SENSOR

INJECTIONCIRCULATOR

SYSTEMCIRCULATOR

BLACK

BLUE

RED

GREEN/GROUND



ZONECONTROL

BOILSEN

OUTSEN

BOILER SENSOR

OUTDOORSENSOR

PC702

STAGE1

STAGE2

BOILER#2

BOILER#1

DHWDEMAND

SR 504-EXP


SR 504-EXP

MASTER

SLAVE(SEE NOTE BON PAGE 23)

T

T

24 V

AC

ZO

NE

1Z

ON

E 2

ZO

NE

3Z

ON

E 4

ZO

NE

5

FUSE (5 AMP MAX)

TT

TT

TT

TT

TT

ZVC

405

12

34

12

34

12

34

12

34

12

34

ZO

NE

1Z

ON

E 2

ZO

NE

3Z

ON

E 4

ZO

NE

5

2 W

IRE

ZO

NE

VALV

E(N

O E

ND

SW

ITC

H)

JUM

PER

3 &

4

TAC

O3

WIR

E Z

ON

E V

ALV

E

1 2 3

MO

TOR

END

SWIT

CH

THER

MO

STA

TTH

ERM

OST

AT

THER

MO

STA

T

4 W

IRE

ZO

NE

VALV

E(P

OW

ER O

PEN

, SEL

F C

LOSI

NG

)

T ST

AT

1

VA

LVE

1

T ST

AT

2

VA

LVE

2T

STA

T 3

VA

LVE

3T

STA

T 4

VA

LVE

4T

STA

T 5

VA

LVE

5PO

WER

FIVE

ZO

NE

ZO

NE

VALV

E C

ON

TRO

L

24

VAC

FACTORYINSTALLED

TRANSFORMER

120

VA

CIN

PUT

WH

ITE

BLA

CK

END

SWIT

CH

N/O

CO

MN

/C

TO B

OIL

ER A

QU

AST

AT

RELA

Y

POWER IN

24

VAC

FACTORYINSTALLED

TRANSFORMER

120

VA

CIN

PUT

WH

ITE

BLA

CK

BO

ILE

R

HN

SYST

EMPU

MP

SYST

EM P

UM

P A

ND

BO

ILER

TU

RN O

NW

HEN

AN

Y Z

ON

E VA

LVE

OPE

NS.

TT

T

29

ZVC4

03/4

05 w

ith S

yste

m P

ump

30

24 V

AC

ZO

NE

1Z

ON

E 2

ZO

NE

3Z

ON

E 4

ZO

NE

5Z

ON

E 6

MO

DE

NO

RMA

LRE


TT

TT

TT

TT

TT

TT

ZO

NE

6 PR

IORI

TY

OFF

ON

ZVC

40

6

12

34

12

34

12

34

12

34

12

34

ZO

NE

1Z

ON

E 2

ZO

NE

3Z

ON

E 4

ZO

NE

5

2 W

IRE

ZO

NE

VALV

E(N

O E

ND

SW

ITC

H)

JUM

PER

3 &

4

TAC

O3

WIR

E Z

ON

E VA

LVE

1 2 3

MO

TOR

END

SWIT

CH

THER

MO

STA

TTH

ERM

OST

AT

THER

MO

STA

T

4 W

IRE

ZO

NE

VALV

E(P

OW

ER O

PEN

, SEL

F C

LOSI

NG

)

T ST

AT

1

VALV

E 1

T ST

AT

2

VALV

E 2

T ST

AT

3VA

LVE

3T

STA

T 4

VALV

E 4

T ST

AT

5VA

LVE

5T

STA

T 6

VALV

E 6

POW

ER

SIX

ZO

NE

ZO

NE

VALV

E C

ON

TRO

LW

ITH

OPT

ION

AL

PRIO

RITY

24

VAC

FACTORYINSTALLED

TRANSFORMER

120

VA

CIN

PUT

WH

ITE

BLA

CK

POWER IN

24

VAC

FACTORYINSTALLED

TRANSFORMER 1

20 V

AC

INPU

T

WH

ITE

BLA

CK

N/O

CO

MZ

ON

E 6

RELA

Y

DRY

CO

NTA

CTS

END

SWIT

CH

EXTR

AEN

DSW

ITC

H

MA

INN

/C

TO B

OIL

ER A

QU

AST

AT

RELA

Y

BO

ILE

R

HN

SYST

EMPU

MP

AA

QU

AST

AT

ON

DH

W H

EATE

R

SYST

EM P

UM

P A

ND

BO

ILER

TU

RN O

NW

HEN

AN

Y Z

ON

E VA

LVE

OPE

NS.

12

34

ZO

NE

6

PRIO

RITY

ZO

NE

JUM

PER

3 &

4S

EE

NO

TE

Not

e: W

hen

a ci

rcul

ator

is u

sed

on t

hep

riorit

y zo

ne in

stea

d of

a z

one

valv

e,ju

mp

er 3

and

4 o

f the

prio

rity

zone

.

TT

T

ZVC4

04/4

06 w

ith S

yste

m P

ump

24 V

AC

ZO

NE

1Z

ON

E 2

ZO

NE

3Z

ON

E 4

ZO

NE

5Z

ON

E 6

MO

DE

NO

RMA

LRE


TT

TT

TT

TT

TT

TT

ZO

NE

6 PR

IORI

TY

OFF

ON

ZVC

40

6

12

34

12

34

12

34

12

34

12

34

ZO

NE

1Z

ON

E 2

ZO

NE

3Z

ON

E 4

ZO

NE

5

2 W

IRE

ZO

NE

VALV

E(N

O E

ND

SW

ITC

H)

JUM

PER

3 &

4

TAC

O3

WIR

E Z

ON

E V

ALV

E

1 2 3

MO

TOR

END

SWIT

CH

THER

MO

STA

TTH

ERM

OST

AT

THER

MO

STA

T

4 W

IRE

ZO

NE

VALV

E(P

OW

ER O

PEN

, SEL

F C

LOSI

NG

)

T ST

AT

1

VALV

E 1

T ST

AT

2

VALV

E 2

T ST

AT

3VA

LVE

3T

STA

T 4

VALV

E 4

T ST

AT

5VA

LVE

5T

STA

T 6

VALV

E 6

POW

ER

SIX

ZO

NE

ZO

NE

VALV

E C

ON

TRO

LW

ITH

OPT

ION

AL

PRIO

RITY

24

VAC

FACTORYINSTALLED

TRANSFORMER

120

VA

CIN

PUT

WH

ITE

BLA

CK

POWER IN

24

VAC

FACTORYINSTALLED

TRANSFORMER

120

VA

CIN

PUT

WH

ITE

BLA

CK

N/O

CO

MZ

ON

E 6

RELA

YEN

DSW

ITC

H

EXTR

AEN

DSW

ITC

H

MA

INN

/C

12

34

ZO

NE

6

PRIO

RITY

ZO

NE

JUM

PER

3 &

4S

EE

NO

TE

TO B

OIL

ER A

QU

AST

AT

RELA

Y

BO

ILE

R

HN

DH

WPU

MP

Not

e: W

hen

a ci

rcul

ator

is u

sed

on t

hep

riorit

y zo

ne in

stea

d of

a z

one

valv

e,ju

mp

er 3

and

4 o

f the

prio

rity

zone

.

AA

QU

AST

AT

ON

DH

W H

EATE

R

BOIL

ER T

URN

S O

N W

HEN

AN

Y Z

ON

E VA

LVE

OPE

NS.

DH

W P

UM

P TU

RNS

ON

ON

LY W

HEN

PRI

ORI

TY Z

ON

E C

ALL

S.

TT

T

31

ZVC4

04/4

06 w

ith D

omes

tic H

ot W

ater

(DHW

) Pum

p

32

24 V

AC

ZO

NE

1Z

ON

E 2

ZO

NE

3Z

ON

E 4

ZO

NE

5Z

ON

E 6

MO

DE

NO

RMA

LRE


TT

TT

TT

TT

TT

TT

ZO

NE

6 PR

IORI

TY

OFF

ON

ZVC

40

6

12

34

12

34

12

34

12

34

12

34

ZO

NE

1Z

ON

E 2

ZO

NE

3Z

ON

E 4

ZO

NE

5

2 W

IRE

ZO

NE

VALV

E(N

O E

ND

SW

ITC

H)

JUM

PER

3 &

4

TAC

O3

WIR

E Z

ON

E V

ALV

E

1 2 3

MO

TOR

END

SWIT

CH

THER

MO

STA

TTH

ERM

OST

AT

THER

MO

STA

T

4 W

IRE

ZO

NE

VALV

E(P

OW

ER O

PEN

, SEL

F C

LOSI

NG

)

T ST

AT

1

VALV

E 1

T ST

AT

2

VALV

E 2

T ST

AT

3VA

LVE

3T

STA

T 4

VALV

E 4

T ST

AT

5VA

LVE

5T

STA

T 6

VALV

E 6

POW

ER

SIX

ZO

NE

ZO

NE

VALV

E C

ON

TRO

LW

ITH

OPT

ION

AL

PRIO

RITY

24

VAC

FACTORYINSTALLED

TRANSFORMER

120

VA

CIN

PUT

WH

ITE

BLA

CK

POWER IN

24

VAC

FACTORYINSTALLED

TRANSFORMER 1

20 V

AC

INPU

T

WH

ITE

BLA

CK

N/O

CO

MZ

ON

E 6

RELA

YEN

DSW

ITC

H

EXTR

AEN

DSW

ITC

H

MA

INN

/C

12

34

ZO

NE

6

PRIO

RITY

ZO

NE

JUM

PER

3 &

4S

EE

NO

TE

TO B

OIL

ER A

QU

AST

AT

RELA

Y

BO

ILE

R

HN

DH

WPU

MP

Not

e: W

hen

a ci

rcul

ator

is u

sed

on t

hep

riorit

y zo

ne in

stea

d of

a z

one

valv

e,ju

mp

er 3

and

4 o

f the

prio

rity

zone

.

AA

QU

AST

AT

ON

DH

W H

EATE

R

SYST

EM P

UM

P A

ND

BO

ILER

TU

RN O

N W

HEN

AN

Y Z

ON

E VA

LVE

OPE

NS.

DH

W P

UM

P TU

RNS

ON

ON

LY W

HEN

PRI

ORI

TY Z

ON

E C

ALL

S.

SYST

EMPU

MP

TT

T

ZVC4

04/4

06 w

ith S

yste

m a

nd D

HW P

umps

33

24 V

AC

ZO

NE

1Z

ON

E 2

ZO

NE

3Z

ON

E 4

ZO

NE

5Z

ON

E 6

MO

DE

NO

RMA

LRE


TT

TT

TT

TT

TT

TT

ZO

NE

6 PR

IORI

TY

OFF

ON

ZVC

40

6

12

34

12

34

12

34

12

34

12

34

ZO

NE

1Z

ON

E 2

ZO

NE

3Z

ON

E 4

ZO

NE

5

2 W

IRE

ZO

NE

VALV

E(N

O E

ND

SW

ITC

H)

JUM

PER

3 &

4

TAC

O3

WIR

E Z

ON

E V

ALV

E

1 2 3

MO

TOR

END

SWIT

CH

THER

MO

STA

TTH

ERM

OST

AT

THER

MO

STA

T

4 W

IRE

ZO

NE

VALV

E(P

OW

ER O

PEN

, SEL

F C

LOSI

NG

)

T ST

AT

1

VALV

E 1

T ST

AT

2

VALV

E 2

T ST

AT

3VA

LVE

3T

STA

T 4

VALV

E 4

T ST

AT

5VA

LVE

5T

STA

T 6

VALV

E 6

POW

ER

SIX

ZO

NE

ZO

NE

VALV

E C

ON

TRO

LW

ITH

OPT

ION

AL

PRIO

RITY

24

VAC

FACTORYINSTALLED

TRANSFORMER

120

VA

CIN

PUT

WH

ITE

BLA

CK

POWER IN

24

VAC

FACTORYINSTALLED

TRANSFORMER 1

20 V

AC

INPU

T

WH

ITE

BLA

CK

N/O

CO

MZ

ON

E 6

RELA

YEN

DSW

ITC

H

EXTR

AEN

DSW

ITC

H

MA

INN

/C

12

34

ZO

NE

6

PRIO

RITY

ZO

NE

JUM

PER

3 &

4S

EE

NO

TE

TO B

OIL

ER A

QU

AST

AT

RELA

Y

BO

ILE

R

HN

DH

WPU

MP

Not

e: W

hen

a ci

rcul

ator

is u

sed

on t

hepr

iorit

y zo

ne in

stea

d of

a z

one

valv

e,ju

mpe

r 3

and

4 of

the

prio

rity

zone

.

AA

QU

AST

AT

ON

DH

W H

EATE

R

SYST

EM P

UM

P A

ND

BO

ILER

TU

RN O

N W

HEN

AN

Y Z

ON

E VA

LVE

OPE

NS.

DH

W P

UM

P TU

RNS

ON

ON

LY W

HEN

PRI

ORI

TY Z

ON

E C

ALL

S.

SEC

ON

DA

RY P

UM

P C

OM

ES O

N W

HEN

AN

Y Z

ON

E C

ALL

S EX

CEP

T P

RIO

RITY

ZO

NE.

SYST

EMPU

MP

SEC

ON

DA

RYPU

MP

TT

T

ZVC4

04/4

06 w

ith S

yste

m, D

HW a

nd S

econ

dary

Pum

ps

34

2 ZVC404/406 Connected Together with Priority

24 VAC

POWER IN


MODENORMAL RESET

FUSE (3 A

MP M

AX

)


ZONE 4 PRIORITY

OFF

ON

N/O COM N/CZONE 4 RELAY

DRYCONTACTS

1 2 3 4 1 2 3 4ZONE 1 ZONE 2


JUMPER3 & 4


123

THERMOSTAT THERMOSTAT THERMOSTAT

1 2 3 4ZONE 3

MOTOR ENDSWITCH


T STAT 1

VALVE 1T STAT 2VALVE 2T STAT 3

VALVE 3T STAT 4VALVE 4POWER

ENDSWITCH

EXTRAEND

SWITCH

MAIN

24VAC

FA

CTO

RYIN

STA

LLED

TRA

NSF

ORM

ER

120 VACINPUT

WHITE

BLACK

ZVC 404FOUR ZONE ZONE VALVE CONTROL


1 2 3 4ZONE 4

PRIORITYZONE


24 VAC

POWER IN


MODENORMAL RESET

FUSE (3 A

MP M

AX

)


ZONE 4 PRIORITY

OFF

ON

N/O COM N/CZONE 4 RELAY

TO BOILER AQUASTAT RELAY

DRYCONTACTS

1 2 3 4 1 2 3 4ZONE 1 ZONE 2


JUMPER3 & 4


123


1 2 3 4ZONE 3

MOTOR ENDSWITCH


T STAT 1



ENDSWITCH

EXTRAEND

SWITCH

MAIN

24VAC

FA

CTO

RYIN

STA

LLED

TRA

NSF

ORM

ER

120 VACINPUT

WHITE

BLACK

FOUR ZONE ZONE VALVE CONTROLWITH OPTIONAL PRIORITY

BOILER

H

N

AAQUASTAT ONDHW HEATER

PRIORITYON

PRIORITYON

TO BOILERAQUASTAT RELAY

ZVC 404


1 2 3 4ZONE 4

PRIORITYZONE


T T T

T T T

35

2 EXP Zone Valve Controls Connected Together with System Pump

ZONE 1 ZONE 2 ZONE 3 ZONE 4 ZONE 5 ZONE 6

FUSE

7 A

MP

MA

X

T T T T T T T T T T T T

ZONE 6

OFF

ON

1 2 3 4ZONE 1

1 2 3 4ZONE 2

1 2 3 4ZONE 3

1 2 3 4ZONE 4

1 2 3 4ZONE 5

1 2 3 4ZONE 6

MODENORMALRESET

PRIORITYZONE



123

JUMPER3 & 4

MOTOR ENDSWITCH

4 WIRE ZONE VALVE(POWER OPEN, SELF CLOSING)

JUMPER3 & 4

1 2 3 4

MASTER

SLAVEPOWER

CONTROLS

PLUG-INCARDS PRIORITY

TAC

O, I

NC

ZV

C40

6-EX

P

T STAT 1

T STAT 2

T STAT 3

T STAT 4

T STAT 5

T STAT 6

POWER ON

VALVE 1

VALVE 2

VALVE 3

VALVE 4

VALVE 5

VALVE 6

�SEE NOTE

EXPANSION

ZVC 406-EXPSIX ZONE ZONE VALVE CONTROL


24 VAC

POW

ER IN

24 VAC FA

CTO

RYIN

STA

LLED

TRA

NSF

ORM

ER

120 VACINPUT

WHITE

BLACK

TO BOILER AQUASTAT RELAY

N/O COMZONE 6 RELAY

N/CEND

SWITCHA

PUMP

ENDSWITCH

BBOILER

H

N

BOILER

24 VAC

FA

CTO

RYIN

STA

LLED

TRA

NSF

ORM

ER

120 VACINPUT

WHITE

BLACK


FUSE

7 A

MP

MA

X


ZONE 6

OFF

ON

1 2 3 4ZONE 1

1 2 3 4ZONE 2

1 2 3 4ZONE 3

1 2 3 4ZONE 4

1 2 3 4ZONE 5

MODENORMALRESET

2 WIREZONE VALVE

(NO END SWITCH)

TACO3 WIRE

ZONE VALVE

123

JUMPER3 & 4

MOTOR ENDSWITCH

4 WIREZONE VALVE

(POWER OPEN, SELF CLOSING)

1 2 3 4

MASTER

SLAVEPOWER

CONTROLS


TAC

O, I

NC

ZV

C40

6-EX

P

T STAT 1

T STAT 2

T STAT 3

T STAT 4

T STAT 5

T STAT 6

POWER ON

VALVE 1

VALVE 2

VALVE 3

VALVE 4

VALVE 5

VALVE 6

EXPANSION



POW

ER IN 24 VAC

FA

CTO

RYIN

STA

LLED

TRA

NSF

ORM

ER

120 VACINPUT

WHITE

BLACK

DRYCONTACTS

N/O COMZONE 6 RELAY

N/CEND

SWITCHA

PUMP

ENDSWITCH

BBOILER

24 VAC

FA

CTO

RYIN

STA

LLED

TRA

NSF

ORM

ER

120 VACINPUT

WHITE

BLACK


SWITCH SETTINGS

Master/Slave: MasterReset/Normal: NormalPriority Zone: On

SWITCH SETTINGSMaster/Slave: SlaveReset/Normal: Normal Priority Zone: Off

A AQUASTAT ONDHW HEATERTTT

T T T

120 VACINPUT

1 2 3 4ZONE 6

PRIORITYZONE


MASTER

SLAVE

SYSTEM PUMP AND BOILER TURN ON WHEN ANY ZONE VALVE OPENS.

SYSTEMPUMP

36

2 EXP Zone Valve Controls Connected Together with DHW Pump


FUSE

7 A

MP

MA

X


ZONE 6

OFF

ON

1 2 3 4ZONE 1

1 2 3 4ZONE 2

1 2 3 4ZONE 3

1 2 3 4ZONE 4

1 2 3 4ZONE 5

1 2 3 4ZONE 6

MODENORMALRESET

PRIORITYZONE



123

JUMPER3 & 4

MOTOR ENDSWITCH


JUMPER3 & 4

1 2 3 4

MASTER

SLAVEPOWER

CONTROLS


TAC

O, I

NC

ZV

C40

6-EX

P

T STAT 1

T STAT 2

T STAT 3

T STAT 4

T STAT 5

T STAT 6

POWER ON

VALVE 1

VALVE 2

VALVE 3

VALVE 4

VALVE 5

VALVE 6

�SEE NOTE

EXPANSION



24 VACPO

WER

IN

24 VAC FA

CTO

RYIN

STA

LLED

TRA

NSF

ORM

ER

120 VACINPUT

WHITE

BLACK


N/O COMZONE 6 RELAY

N/CEND

SWITCHA

PUMP

ENDSWITCH

BBOILER

H

N

BOILER

24 VAC

FA

CTO

RYIN

STA

LLED

TRA

NSF

ORM

ER

120 VACINPUT

WHITE

BLACK


FUSE

7 A

MP

MA

X


ZONE 6

OFF

ON

1 2 3 4ZONE 1

1 2 3 4ZONE 2

1 2 3 4ZONE 3

1 2 3 4ZONE 4

1 2 3 4ZONE 5

MODENORMALRESET

2 WIREZONE VALVE

(NO END SWITCH)

TACO3 WIRE

ZONE VALVE

123

JUMPER3 & 4

MOTOR ENDSWITCH

4 WIREZONE VALVE


1 2 3 4

MASTER

SLAVEPOWER

CONTROLS


TAC

O, I

NC

ZV

C40

6-EX

P

T STAT 1

T STAT 2

T STAT 3

T STAT 4

T STAT 5

T STAT 6

POWER ON

VALVE 1

VALVE 2

VALVE 3

VALVE 4

VALVE 5

VALVE 6

EXPANSION



POW

ER IN 24 VAC

FA

CTO

RYIN

STA

LLED

TRA

NSF

ORM

ER

120 VACINPUT

WHITE

BLACK

DRYCONTACTS

N/O COMZONE 6 RELAY

N/CEND

SWITCHA

PUMP

ENDSWITCH

BBOILER

24 VAC

FA

CTO

RYIN

STA

LLED

TRA

NSF

ORM

ER

120 VACINPUT

WHITE

BLACK


SWITCH SETTINGS




T T T

120 VACINPUT

1 2 3 4ZONE 6

PRIORITYZONE


MASTER

SLAVE

BOILER TURNS ON WHEN ANY ZONE VALVE OPENS.DHW PUMP TURNS ON ONLY WHEN PRIORITY ZONE CALLS.

DHWPUMP

2 EXP Zone Valve Controls Connected Together with System and DHW Pumps

37


FUSE

7 A

MP

MA

X


ZONE 6

OFF

ON

1 2 3 4ZONE 1

1 2 3 4ZONE 2

1 2 3 4ZONE 3

1 2 3 4ZONE 4

1 2 3 4ZONE 5

1 2 3 4ZONE 6

MODENORMALRESET

PRIORITYZONE



123

JUMPER3 & 4

MOTOR ENDSWITCH


JUMPER3 & 4

1 2 3 4

MASTER

SLAVEPOWER

CONTROLS


TAC

O, I

NC

ZV

C40

6-EX

P

T STAT 1

T STAT 2

T STAT 3

T STAT 4

T STAT 5

T STAT 6

POWER ON

VALVE 1

VALVE 2

VALVE 3

VALVE 4

VALVE 5

VALVE 6

�SEE NOTE

EXPANSION



24 VAC

POW

ER IN

24 VAC FA

CTO

RYIN

STA

LLED

TRA

NSF

ORM

ER

120 VACINPUT

WHITE

BLACK


N/O COMZONE 6 RELAY

N/CEND

SWITCHA

PUMP

ENDSWITCH

BBOILER

H

N

BOILER

24 VAC

FA

CTO

RYIN

STA

LLED

TRA

NSF

ORM

ER

120 VACINPUT

WHITE

BLACK


FUSE

7 A

MP

MA

X


ZONE 6

OFF

ON

1 2 3 4ZONE 1

1 2 3 4ZONE 2

1 2 3 4ZONE 3

1 2 3 4ZONE 4

1 2 3 4ZONE 5

MODENORMALRESET

2 WIREZONE VALVE

(NO END SWITCH)

TACO3 WIRE

ZONE VALVE

123

JUMPER3 & 4

MOTOR ENDSWITCH

4 WIREZONE VALVE


1 2 3 4

MASTER

SLAVEPOWER

CONTROLS


TAC

O, I

NC

ZV

C40

6-EX

P

T STAT 1

T STAT 2

T STAT 3

T STAT 4

T STAT 5

T STAT 6

POWER ON

VALVE 1

VALVE 2

VALVE 3

VALVE 4

VALVE 5

VALVE 6

EXPANSION



POW

ER IN 24 VAC

FA

CTO

RYIN

STA

LLED

TRA

NSF

ORM

ER

120 VACINPUT

WHITE

BLACK

DRYCONTACTS

N/O COMZONE 6 RELAY

N/CEND

SWITCHA

PUMP

ENDSWITCH

BBOILER

24 VAC

FA

CTO

RYIN

STA

LLED

TRA

NSF

ORM

ER

120 VACINPUT

WHITE

BLACK


SWITCH SETTINGS




T T T

120 VACINPUT

1 2 3 4ZONE 6

PRIORITYZONE


MASTER

SLAVE

SYSTEM PUMP AND BOILER TURN ON WHEN ANY ZONE VALVE OPENS.DHW PUMP TURNS ON ONLY WHEN PRIORITY ZONE CALLS.

DHWPUMP

SYSTEMPUMP

38

2 EXP Zone Valve Controls Connected Together with System, DHW and Secondary Pumps


FUSE

7 A

MP

MA

X


ZONE 6

OFF

ON

1 2 3 4ZONE 1

1 2 3 4ZONE 2

1 2 3 4ZONE 3

1 2 3 4ZONE 4

1 2 3 4ZONE 5

1 2 3 4ZONE 6

MODENORMALRESET

PRIORITYZONE



123

JUMPER3 & 4

MOTOR ENDSWITCH


JUMPER3 & 4

1 2 3 4

MASTER

SLAVEPOWER

CONTROLS


TAC

O, I

NC

ZV

C40

6-EX

P

T STAT 1

T STAT 2

T STAT 3

T STAT 4

T STAT 5

T STAT 6

POWER ON

VALVE 1

VALVE 2

VALVE 3

VALVE 4

VALVE 5

VALVE 6

�SEE NOTE

EXPANSION



24 VAC

POW

ER IN

24 VAC FA

CTO

RYIN

STA

LLED

TRA

NSF

ORM

ER

120 VACINPUT

WHITE

BLACK


N/O COMZONE 6 RELAY

N/CEND

SWITCHA

PUMP

ENDSWITCH

BBOILER

H

N

BOILER

24 VAC

FA

CTO

RYIN

STA

LLED

TRA

NSF

ORM

ER

120 VACINPUT

WHITE

BLACK


FUSE

7 A

MP

MA

X


ZONE 6

OFF

ON

1 2 3 4ZONE 1

1 2 3 4ZONE 2

1 2 3 4ZONE 3

1 2 3 4ZONE 4

1 2 3 4ZONE 5

MODENORMALRESET

2 WIREZONE VALVE

(NO END SWITCH)

TACO3 WIRE

ZONE VALVE

123

JUMPER3 & 4

MOTOR ENDSWITCH

4 WIREZONE VALVE


1 2 3 4

MASTER

SLAVEPOWER

CONTROLS


TAC

O, I

NC

ZV

C40

6-EX

P

T STAT 1

T STAT 2

T STAT 3

T STAT 4

T STAT 5

T STAT 6

POWER ON

VALVE 1

VALVE 2

VALVE 3

VALVE 4

VALVE 5

VALVE 6

EXPANSION



POW

ER IN 24 VAC

FA

CTO

RYIN

STA

LLED

TRA

NSF

ORM

ER

120 VACINPUT

WHITE

BLACK

DRYCONTACTS

N/O COMZONE 6 RELAY

N/CEND

SWITCHA

PUMP

ENDSWITCH

BBOILER

24 VAC

FA

CTO

RYIN

STA

LLED

TRA

NSF

ORM

ER

120 VACINPUT

WHITE

BLACK


SWITCH SETTINGS




T T T

120 VACINPUT

1 2 3 4ZONE 6

PRIORITYZONE


MASTER

SLAVE

SYSTEM PUMP AND BOILER TURN ON WHEN ANY ZONE VALVE OPENS.DHW PUMP TURNS ON ONLY WHEN PRIORITY ZONE CALLS.SECONDARY PUMP TURNS ON WHEN ANY ZONE CALLS, EXCEPT PRIORITY ZONE.

DHWPUMP

SYSTEMPUMP SECONDARY

PUMP

39

PC70

0 Bo

iler R

eset

Con

trol C

onne

cted

To

EXP

Zone

Val

ve C

ontro

l

ZO

NE

1Z

ON

E 2

ZO

NE

3Z

ON

E 4

ZO

NE

5Z

ON

E 6

FUSE 7 AMP MAX

TT

TT

TT

TT

TT

TT

ZO

NE

6 OFF

ON

12

34

ZO

NE

11

23

4Z

ON

E 2

12

34

ZO

NE

31

23

4Z

ON

E 4

12

34

ZO

NE

51

23

4Z

ON

E 6

MO

DE

NO

RMA

LRE

SET

IND

IREC

TW

ATER

HEA

TER

AQ

UA

STA

TO

R TH

ERM

OST

AT

PRIO

RITY

ZO

NE

2 W

IRE

ZO

NE

VALV

E(N

O E

ND

SW

ITC

H)

TAC

O3

WIR

E Z

ON

E VA

LVE

1 2 3

JUM

PER

3 &

4

MO

TOR

END

SWIT

CH

THER

MO

STA

TTH

ERM

OST

AT

THER

MO

STA

T

4 W

IRE

ZO

NE

VALV

E(P

OW

ER O

PEN

, SEL

F C

LOSI

NG

)JUM

PER

3 &

4

12

34

MA

STER

SLA

VEPO

WER

CO

NTR

OLS

PLU

G-I

NC

ARD

S P

RIO

RIT

Y

TACO, INC ZVC406-EXP

T ST

AT

1

T ST

AT

2

T ST

AT

3

T ST

AT

4

T ST

AT

5

T ST

AT

6

POW

ER O

N

VALV

E 1

VALV

E 2

VALV

E 3

VALV

E 4

VALV

E 5

VALV

E 6

�S

EE

NO

TE

EXPA

NSI

ON

ZVC

406

-EX

PSI

X Z

ON

E Z

ON

E VA

LVE

CO

NTR

OL

WIT

H O

PTIO

NA

L PR

IORI

TY

24

VAC

POWER IN

24

VAC

FACTORYINSTALLED

TRANSFORMER

120

VA

CIN

PUT

WH

ITE

BLA

CK

TO B

OIL

ERA

QU

AST

AT

RELA

Y

DRY

CO

NTA

CTS

N/O

CO

MZ

ON

E 6

RELA

YN

/CEN

DSW

ITC

HA

PUM

P

END

SWIT

CH

BBO

ILER

ZONE

CONT

ROL

BOIL

SEN

OUT

SEN

BO

ILE

R S

EN

SO

R

OU

TD

OO

RS

EN

SO

R

PC

700

SYST

EMC

IRC

ULA

TOR

H N

BO

ILE

R

24

VAC

FACTORYINSTALLED

TRANSFORMER

120

VA

CIN

PUT

WH

ITE

BLA

CK

Not

e: W

hen

a ci

rcul

ator

is u

sed

on t

hepr

iorit

y zo

ne in

stea

d of

a z

one

valv

e,ju

mpe

r 3

and

4 of

the

prio

rity

zone

.

SWIT

CH

SET

TIN

GS

Mas

ter/

Slav

e: M

aste

rRe

set/

Nor

mal

: Res

etPr

iorit

y Z

one:

On

or O

ff

SYST

EM C

IRC

ULA

TOR

AN

D B

OIL

ER T

URN

ON

WH

EN A

NY

ZO

NE

VALV

E O

PEN

S.

TT

T

40

PC70

2 2–

Stag

e Bo

iler R

eset

Con

trol C

onne

cted

To

EXP

Zone

Val

ve C

ontro

l

ZO

NE

1Z

ON

E 2

ZO

NE

3Z

ON

E 4

ZO

NE

5Z

ON

E 6

FUSE 7 AMP MAX

TT

TT

TT

TT

TT

TT

ZO

NE

6 OFF

ON

12

34

ZO

NE

11

23

4Z

ON

E 2

12

34

ZO

NE

31

23

4Z

ON

E 4

12

34

ZO

NE

51

23

4Z

ON

E 6

MO

DE

NO

RMA

LRE

SET

IND

IREC

TW

ATER

HEA

TER

AQ

UA

STA

TO

R TH

ERM

OST

AT

PRIO

RITY

ZO

NE

2 W

IRE

ZO

NE

VALV

E(N

O E

ND

SW

ITC

H)

TAC

O3

WIR

E Z

ON

E VA

LVE

1 2 3

JUM

PER

3 &

4

MO

TOR

END

SWIT

CH

THER

MO

STA

TTH

ERM

OST

AT

THER

MO

STA

T

4 W

IRE

ZO

NE

VALV

E(P

OW

ER O

PEN

, SEL

F C

LOSI

NG

)JUM

PER

3 &

4

12

34

MA

STER

SLA

VEPO

WER

CO

NTR

OLS

PLU

G-I

NC

ARD

S P

RIO

RIT

Y

TACO, INC ZVC406-EXPT

STA

T 1

T ST

AT

2

T ST

AT

3

T ST

AT

4

T ST

AT

5

T ST

AT

6

POW

ER O

N

VALV

E 1

VALV

E 2

VALV

E 3

VALV

E 4

VALV

E 5

VALV

E 6

�S

EE

NO

TE

EXPA

NSI

ON

ZVC

406

-EX

PSI

X Z

ON

E Z

ON

E VA

LVE

CO

NTR

OL

WIT

H O

PTIO

NA

L PR

IORI

TY

24

VA

C

POWER IN

24 VAC

FACTORYINSTALLED

TRANSFORMER

120

VA

CIN

PUT

WH

ITE

BLA

CK

N/O

CO

MZ

ON

E 6

RELA

YN

/CEN

DSW

ITC

HA

PUM

P

END

SWIT

CH

BBO

ILER

SYST

EMC

IRC

ULA

TOR

H N

BO

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R#2ZO

NECO

NTRO

LBO

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NOU

TSE

N BO

ILE

R S

EN

SO

R

OU

TD

OO

RS

EN

SO

R

PC

702

STAG

E1

STAG

E2 B

OIL

ER

#1

DH

WD

EM

AN

D

24

VAC

FACTORYINSTALLED

TRANSFORMER

120

VA

CIN

PUT

WH

ITE

BLA

CK

Not

e: W

hen

a ci

rcul

ator

is u

sed

on

the

prio

rity

zone

inst

ead

of a

zon

e va

lve,

jum

per

3 a

nd 4

of t

he p

riorit

y zo

ne.

SWIT

CH

SET

TIN

GS

Mas

ter/

Slav

e: M

aste

rRe

set/

Nor

mal

: Nor

mal

Prio

rity

Zon

e: O

n or

Off

WIR

ING

NEE

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LY IF

PRIO

RITY

ZO

NE

IS D

HW SY

STEM

CIR

CU

LATO

R A

ND

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TU

RN O

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HEN

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ON

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LVE

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NS.

DH

W C

IRC

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TOR

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S O

N O

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WH

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RIO

RITY

ZO

NE

CA

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WC

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ULA

TOR

TT

T

41

PC70

5 Va

riabl

e Sp

eed

Pum

p In

ject

ion

Cont

rol C

onne

cted

To

EXP

Zone

Val

ve C

ontro

l

ZO

NE

1Z

ON

E 2

ZO

NE

3Z

ON

E 4

ZO

NE

5Z

ON

E 6

FUSE 7 AMP MAX

TT

TT

TT

TT

TT

TT

ZO

NE

6 OFF

ON

12

34

ZO

NE

11

23

4Z

ON

E 2

12

34

ZO

NE

31

23

4Z

ON

E 4

12

34

ZO

NE

51

23

4Z

ON

E 6

MO

DE

NO

RMA

LRE

SET

IND

IREC

TW

ATER

HEA

TER

AQ

UA

STA

TO

R TH

ERM

OST

AT

PRIO

RITY

ZO

NE

2 W

IRE

ZO

NE

VALV

E(N

O E

ND

SW

ITC

H)

TAC

O3

WIR

E Z

ON

E VA

LVE

1 2 3

JUM

PER

3 &

4

MO

TOR

END

SWIT

CH

THER

MO

STA

TTH

ERM

OST

AT

THER

MO

STA

T

4 W

IRE

ZO

NE

VALV

E(P

OW

ER O

PEN

, SEL

F C

LOSI

NG

)JUM

PER

3 &

4

12

34

MA

STER

SLA

VEPO

WER

CO

NTR

OLS

PLU

G-I

NC

ARD

S P

RIO

RIT

Y

TACO, INC ZVC406-EXP

T ST

AT

1

T ST

AT

2

T ST

AT

3

T ST

AT

4

T ST

AT

5

T ST

AT

6

POW

ER O

N

VALV

E 1

VALV

E 2

VALV

E 3

VALV

E 4

VALV

E 5

VALV

E 6

SE

E N

OT

E

EXPA

NSI

ON

ZVC

406

-EX

PSI

X Z

ON

E Z

ON

E VA

LVE

CO

NTR

OL

WIT

H O

PTIO

NA

L PR

IORI

TY

24

VA

C

POWER IN

24

VAC

FACTORYINSTALLED

TRANSFORMER

120

VA

CIN

PUT

WH

ITE

BLA

CK

TO B

OIL

ERA

QU

AST

AT

RELA

Y

DRY

CO

NTA

CTS

N/O

CO

MZ

ON

E 6

RELA

YN

/CEN

DSW

ITC

HA

PUM

P

END

SWIT

CH

BBO

ILER

H N

BO

ILE

R

24

VAC

FACTORYINSTALLED

TRANSFORMER

120

VA

CIN

PUT

WH

ITE

BLA

CK

ZONE

CONT

ROL

BOIL

SEN

OUT

SEN

BO

ILE

R S

EN

SO

R

OU

TD

OO

RS

EN

SO

R

PC

705-

2

SUP

SEN

SU

PP

LY S

EN

SO

R

INJE

CTI

ON

CIR

CU

LATO

R

SYST

EMC

IRC

ULA

TOR

(SEE

NO

TE B

ON

PA

GE

23)

BLA

CK

BLU

E

RED

GRE

EN/G

ROU

ND

Not

e: W

hen

a ci

rcul

ator

is u

sed

on t

hepr

iorit

y zo

ne in

stea

d of

a z

one

valv

e,ju

mpe

r 3

and

4 of

the

prio

rity

zone

.

SWIT

CH

SET

TIN

GS

Mas

ter/

Slav

e: M

aste

rRe

set/

Nor

mal

: Res

etPr

iorit

y Z

one:

On

or O

ff

SYST

EM C

IRC

ULA

TOR

(OPT

ION

AL

LOC

ATI

ON

)

SYST

EM C

IRC

ULA

TOR

AN

D B

OIL

ER T

URN

ON

WH

EN A

NY

ZO

NE

VALV

E O

PEN

S.

TT

T

42

PC700 Boiler Reset Control Connected To 2 EXP Zone Valve Controls


FUSE

7 A

MP

MA

X


ZONE 6

OFF

ON

1 2 3 4ZONE 1

1 2 3 4ZONE 2

1 2 3 4ZONE 3

1 2 3 4ZONE 4

1 2 3 4ZONE 5

1 2 3 4ZONE 6

MODENORMALRESET

PRIORITYZONE



123

JUMPER3 & 4

MOTOR ENDSWITCH


JUMPER3 & 4

1 2 3 4

MASTER

SLAVEPOWER

CONTROLS


TAC

O, I

NC

ZVC

406-

EXP

T STAT 1

T STAT 2

T STAT 3

T STAT 4

T STAT 5

T STAT 6

POWER ON

VALVE 1

VALVE 2

VALVE 3

VALVE 4

VALVE 5

VALVE 6

�SEE NOTE

EXPANSION



POW

ER IN

24 VAC

FA

CTO

RYIN

STA

LLED

TRA

NSF

ORM

ER

120 VACINPUT

WHITE

BLACK


N/O COMZONE 6 RELAY

N/CEND

SWITCHA

PUMP

ENDSWITCH

BBOILER

ZONECONTROL

BOILSEN

OUTSEN

BOILER SENSOR

OUTDOORSENSOR

PC700

SYSTEMCIRCULATOR

H

N

BOILER


24 VAC

FA

CTO

RYIN

STA

LLED

TRA

NSF

ORM

ER

120 VACINPUT

WHITE

BLACK


FUSE

7 A

MP

MA

X


ZONE 6

OFF

ON

1 2 3 4ZONE 1

1 2 3 4ZONE 2

1 2 3 4ZONE 3

1 2 3 4ZONE 4

1 2 3 4ZONE 5

1 2 3 4ZONE 6

MODENORMALRESET

PRIORITYZONE



123

JUMPER3 & 4

MOTOR ENDSWITCH


JUMPER3 & 4

1 2 3 4

MASTER

SLAVEPOWER

CONTROLS


TAC

O, I

NC

ZVC

406-

EXP

T STAT 1

T STAT 2

T STAT 3

T STAT 4

T STAT 5

T STAT 6

POWER ON

VALVE 1

VALVE 2

VALVE 3

VALVE 4

VALVE 5

VALVE 6

�SEE NOTE

EXPANSION



POW

ER IN

24 VAC

FA

CTO

RYIN

STA

LLED

TRA

NSF

ORM

ER

120 VACINPUT

WHITE

BLACK

DRYCONTACTS

N/O COMZONE 6 RELAY

N/CEND

SWITCHA

PUMP

ENDSWITCH

BBOILER

24 VAC

FA

CTO

RYIN

STA

LLED

TRA

NSF

ORM

ER

120 VACINPUT

WHITE

BLACK

SWITCH SETTINGSMaster/Slave: MasterReset/Normal: Reset Priority Zone: On or Off


MASTER

SLAVE

INDIRECT WATER HEATERAQUASTAT OR THERMOSTAT

24 VAC

TTT

24 VAC

TTT

SYSTEM CIRCULATOR AND BOILER TURN ON WHEN ANY ZONE VALVE OPENS.DHW CIRCULATOR TURNS ON ONLY WHEN PRIORITY ZONE CALLS.

DHWCIRCULATOR

43

PC702 2–Stage Boiler Reset Control Connected To 2 EXP Zone Valve Controls


FUSE

7 A

MP

MA

X


ZONE 6

OFF

ON

1 2 3 4ZONE 1

1 2 3 4ZONE 2

1 2 3 4ZONE 3

1 2 3 4ZONE 4

1 2 3 4ZONE 5

1 2 3 4ZONE 6

MODENORMALRESET

PRIORITYZONE



123

JUMPER3 & 4

MOTOR ENDSWITCH


JUMPER3 & 4

1 2 3 4

MASTER

SLAVEPOWER

CONTROLS


TAC

O, I

NC

ZVC

406-

EXP

T STAT 1

T STAT 2

T STAT 3

T STAT 4

T STAT 5

T STAT 6

POWER ON

VALVE 1

VALVE 2

VALVE 3

VALVE 4

VALVE 5

VALVE 6

�SEE NOTE

EXPANSION



POW

ER IN

FA

CTO

RYIN

STA

LLED

TRA

NSF

ORM

ER

120 VACINPUT

WHITE

BLACKN/O COM

ZONE 6 RELAYN/C

ENDSWITCH

APUMP

ENDSWITCH

BBOILER

SYSTEMCIRCULATOR

H

N

24 VAC

FA

CTO

RYIN

STA

LLED

TRA

NSF

ORM

ER

120 VACINPUT

WHITE

BLACK


FUSE

7 A

MP

MA

X


ZONE 6

OFF

ON

1 2 3 4ZONE 1

1 2 3 4ZONE 2

1 2 3 4ZONE 3

1 2 3 4ZONE 4

1 2 3 4ZONE 5

1 2 3 4ZONE 6

MODENORMALRESET

PRIORITYZONE



123

JUMPER3 & 4

MOTOR ENDSWITCH


JUMPER3 & 4

1 2 3 4

MASTER

SLAVEPOWER

CONTROLS


TAC

O, I

NC

ZVC

406-

EXP

T STAT 1

T STAT 2

T STAT 3

T STAT 4

T STAT 5

T STAT 6

POWER ON

VALVE 1

VALVE 2

VALVE 3

VALVE 4

VALVE 5

VALVE 6

�SEE NOTE

EXPANSION



POW

ER IN

24

VAC

FA

CTO

RYIN

STA

LLED

TRA

NSF

ORM

ER

120 VACINPUT

WHITE

BLACK

DRYCONTACTS

N/O COMZONE 6 RELAY

N/CEND

SWITCHA

PUMP

ENDSWITCH

BBOILER

24 VAC

FA

CTO

RYIN

STA

LLED

TRA

NSF

ORM

ER

120 VACINPUT

WHITE

BLACK

BOILER#2

ZONECONTROL

BOILSEN

OUTSEN

BOILER SENSOR

OUTDOORSENSOR

PC702

STAGE1

STAGE2

BOILER#1

DHWDEMAND

24

VAC


SWITCH SETTINGSMaster/Slave: MasterReset/Normal: Normal Priority Zone: On or Off

SWITCH SETTINGSMaster/Slave: SlaveReset/Normal: NormalPriority Zone: Off


MASTER

SLAVE


24 VAC

TTT

24 VAC

TTT


DHWCIRCULATOR

44

PC705 Variable Speed Pump Injection Control Connected To 2 EXP Zone Valve Controls


FUSE

7 A

MP

MA

X


ZONE 6

OFF

ON

1 2 3 4ZONE 1

1 2 3 4ZONE 2

1 2 3 4ZONE 3

1 2 3 4ZONE 4

1 2 3 4ZONE 5

1 2 3 4ZONE 6

MODENORMALRESET

PRIORITYZONE



123

JUMPER3 & 4

MOTOR ENDSWITCH


JUMPER3 & 4

1 2 3 4

MASTER

SLAVEPOWER

CONTROLS


TAC

O, I

NC

ZVC

406-

EXP

T STAT 1

T STAT 2

T STAT 3

T STAT 4

T STAT 5

T STAT 6

POWER ON

VALVE 1

VALVE 2

VALVE 3

VALVE 4

VALVE 5

VALVE 6

SEE NOTE

EXPANSION



POW

ER IN

24 VAC

FA

CTO

RYIN

STA

LLED

TRA

NSF

ORM

ERWHITE

BLACK


DRYCONTACTS

N/O COMZONE 6 RELAY

N/CEND

SWITCHA

PUMP

ENDSWITCH

BBOILER

H

N

BOILER


24 VAC

FA

CTO

RYIN

STA

LLED

TRA

NSF

ORM

ER

120 VACINPUT

WHITE

BLACK

ZONECONTROL

BOILSEN

OUTSEN

BOILER SENSOR

OUTDOORSENSOR

PC705-2

SUPSEN

SUPPLY SENSOR

INJECTIONCIRCULATOR

SYSTEMCIRCULATOR

BLACK

BLUE

RED

GREEN/GROUND


FUSE

7 A

MP

MA

X


ZONE 6

OFF

ON

1 2 3 4ZONE 1

1 2 3 4ZONE 2

1 2 3 4ZONE 3

1 2 3 4ZONE 4

1 2 3 4ZONE 5

1 2 3 4ZONE 6

MODENORMALRESET

PRIORITYZONE



123

JUMPER3 & 4

MOTOR ENDSWITCH


JUMPER3 & 4

1 2 3 4

MASTER

SLAVEPOWER

CONTROLS


TAC

O, I

NC

ZVC

406-

EXP

T STAT 1

T STAT 2

T STAT 3

T STAT 4

T STAT 5

T STAT 6

POWER ON

VALVE 1

VALVE 2

VALVE 3

VALVE 4

VALVE 5

VALVE 6

SEE NOTE

EXPANSION



POW

ER IN

24 VAC

FA

CTO

RYIN

STA

LLED

TRA

NSF

ORM

ERWHITE

BLACK

DRYCONTACTS

N/O COMZONE 6 RELAY

N/CEND

SWITCHA

PUMP

ENDSWITCH

BBOILER

24 VAC

FA

CTO

RYIN

STA

LLED

TRA

NSF

ORM

ER

120 VACINPUT

WHITE

BLACK

SWITCH SETTINGSMaster/Slave: Master Reset/Normal: ResetPriority Zone: On or Off

SWITCH SETTINGS

Master/Slave: SlaveReset/Normal: NormalPriority Zone: Off


MASTER

SLAVE


24 VAC

TTT

24 VAC

TTT

(SEE NOTE B ON PAGE 23)

45

PC700 and PC705 Connected To 2 EXP Zone Valve Controls


FUSE

7 A

MP

MA

X


ZONE 6

OFF

ON

1 2 3 4ZONE 1

1 2 3 4ZONE 2

1 2 3 4ZONE 3

1 2 3 4ZONE 4

1 2 3 4ZONE 5

1 2 3 4ZONE 6

MODENORMALRESET

PRIORITYZONE



123

JUMPER3 & 4

MOTOR ENDSWITCH


JUMPER3 & 4

1 2 3 4

MASTER

SLAVEPOWER

CONTROLS


TAC

O, I

NC

ZVC

406-

EXP

T STAT 1

T STAT 2

T STAT 3

T STAT 4

T STAT 5

T STAT 6

POWER ON

VALVE 1

VALVE 2

VALVE 3

VALVE 4

VALVE 5

VALVE 6

SEE NOTE

EXPANSION



POW

ER IN

24 VAC

FA

CTO

RYIN

STA

LLED

TRA

NSF

ORM

ER

120 VACINPUT

WHITE

BLACK


N/O COMZONE 6 RELAY

N/CEND

SWITCHA

PUMP

ENDSWITCH

BBOILER

ZONECONTROL

BOILSEN

OUTSEN

BOILER SENSOR

OUTDOORSENSOR

PC700

SYSTEMCIRCULATOR

H

N

BOILER


24 VAC

FA

CTO

RYIN

STA

LLED

TRA

NSF

ORM

ER

120 VACINPUT

WHITE

BLACK


FUSE

7 A

MP

MA

X


ZONE 6

OFF

ON

1 2 3 4ZONE 1

1 2 3 4ZONE 2

1 2 3 4ZONE 3

1 2 3 4ZONE 4

1 2 3 4ZONE 5

1 2 3 4ZONE 6

MODENORMALRESET

PRIORITYZONE



123

JUMPER3 & 4

MOTOR ENDSWITCH


JUMPER3 & 4

1 2 3 4

MASTER

SLAVEPOWER

CONTROLS


TAC

O, I

NC

ZVC

406-

EXP

T STAT 1

T STAT 2

T STAT 3

T STAT 4

T STAT 5

T STAT 6

POWER ON

VALVE 1

VALVE 2

VALVE 3

VALVE 4

VALVE 5

VALVE 6

SEE NOTE

EXPANSION



POW

ER IN

24 VAC

FA

CTO

RYIN

STA

LLED

TRA

NSF

ORM

ER

120 VACINPUT

WHITE

BLACK

DRYCONTACTS

N/O COMZONE 6 RELAY

N/CEND

SWITCHA

PUMP

ENDSWITCH

BBOILER

24 VAC

FA

CTO

RYIN

STA

LLED

TRA

NSF

ORM

ER

120 VACINPUT

WHITE

BLACK

ZONECONTROL

BOILSEN

OUTSEN

BOILER SENSOR

OUTDOORSENSOR

PC705-2

SUPSEN

SUPPLY SENSOR

INJECTIONCIRCULATOR

SYSTEMCIRCULATOR

BLACK

BLUE

RED

GREEN/GROUND

SWITCH SETTINGSMaster/Slave: MasterReset/Normal: Reset Priority Zone: On or Off


MASTER

SLAVE


24 VAC

TTT

24 VAC

TTT


DHWCIRCULATOR


46

PC702 and PC705 Connected To 2 EXP Zone Valve Controls


FUSE

7 A

MP

MA

X


ZONE 6

OFF

ON

1 2 3 4ZONE 1

1 2 3 4ZONE 2

1 2 3 4ZONE 3

1 2 3 4ZONE 4

1 2 3 4ZONE 5

1 2 3 4ZONE 6

MODENORMALRESET

PRIORITYZONE



123

JUMPER3 & 4

MOTOR ENDSWITCH


JUMPER3 & 4

1 2 3 4

MASTER

SLAVEPOWER

CONTROLS


TAC

O, I

NC

ZV

C40

6-EX

P

T STAT 1

T STAT 2

T STAT 3

T STAT 4

T STAT 5

T STAT 6

POWER ON

VALVE 1

VALVE 2

VALVE 3

VALVE 4

VALVE 5

VALVE 6

SEE NOTE

EXPANSION



POW

ER IN

FA

CTO

RYIN

STA

LLED

TRA

NSF

ORM

ER

120 VACINPUT

WHITE

BLACKN/O COM

ZONE 6 RELAYN/C

ENDSWITCH

APUMP

ENDSWITCH

BBOILER

SYSTEMCIRCULATOR

H

N

24 VAC

FA

CTO

RYIN

STA

LLED

TRA

NSF

ORM

ER

120 VACINPUT

WHITE

BLACK

BOILER#2

ZONECONTROL

BOILSEN

OUTSEN

BOILER SENSOR

OUTDOORSENSOR

PC702

STAGE1

STAGE2

BOILER#1

DHWDEMAND

24

VAC


FUSE

7 A

MP

MA

X


ZONE 6

OFF

ON

1 2 3 4ZONE 1

1 2 3 4ZONE 2

1 2 3 4ZONE 3

1 2 3 4ZONE 4

1 2 3 4ZONE 5

1 2 3 4ZONE 6

MODENORMALRESET

PRIORITYZONE



123

JUMPER3 & 4

MOTOR ENDSWITCH


JUMPER3 & 4

1 2 3 4

MASTER

SLAVEPOWER

CONTROLS


TAC

O, I

NC

ZV

C40

6-EX

P

T STAT 1

T STAT 2

T STAT 3

T STAT 4

T STAT 5

T STAT 6

POWER ON

VALVE 1

VALVE 2

VALVE 3

VALVE 4

VALVE 5

VALVE 6

SEE NOTE

EXPANSION



POW

ER IN

24 VAC

FA

CTO

RYIN

STA

LLED

TRA

NSF

ORM

ER

120 VACINPUT

WHITE

BLACK

DRYCONTACTS

N/O COMZONE 6 RELAY

N/CEND

SWITCHA

PUMP

ENDSWITCH

BBOILER

24 VAC

FA

CTO

RYIN

STA

LLED

TRA

NSF

ORM

ER

120 VACINPUT

WHITE

BLACK

ZONECONTROL

BOILSEN

OUTSEN

BOILER SENSOR

OUTDOORSENSOR

PC705-2

SUPSEN

SUPPLY SENSOR

INJECTIONCIRCULATOR

SYSTEMCIRCULATOR

BLACK

BLUE

RED

GREEN/GROUND


SWITCH SETTINGSMaster/Slave: MasterReset/Normal: Normal Priority Zone: On or Off



MASTER

SLAVE


24 VAC

TTT

24 VAC

TTT


DHWCIRCULATOR


47

HAFC101 with 1 Speed Air Handler

HAFC 101 WITH 1 SPEED AIR HANDLER(Both HFC 101 and HAFC 201 are

capable of 1 and 2 speed applications.)

THERMOSTAT

Optional Power Wireto Thermostatthat Requires 24VAC

To: Aquastat onReturn Line ofHydro Coil

Dry Contacts To:“T T” on Boileror Switching Relay

Power OnCall for HeatFan, CoolingFan, Heating

OutdoorCondenserUnit

T T

BOILER AIR HANDLER

G GX X C R Y

C R GY TWTHERMOSTAT AQUASTAT

HAFC101HYDRO AIR FAN CONTROL

Jumper

M

FanRelay

Line

24 V

AC

LOW HIGH

T

48




THERMOSTAT



Dry Contacts To:“T T” on Boileror Switching Relay



T T

BOILER AIR HANDLER

G GX X C R Y



M

Low

Hig

h

Line

24 V

AC

Fan

Rela

ys

LOW HIGH

T

49


M

FanRelay

Line

24 V

AC

THERMOSTAT


To: OptionalAquastat onReturn Line ofHydro Coil



T T

BOILER AIR HANDLER

G GX X C R Y

C R GYWTHERMOSTAT AQUASTATS


TTWATER COIL FREEZE PR

To: Optional Aquastator Thermostat to senselow ambienttemperature

Hot

Neutral

Circulator

XXPUMP

5 AMP 1/6 HP RATEDDRY CONTACTS

1 MIN

ON

DELA

Y - FAN

3 MIN

ON

DELA

Y - FAN

2 MIN

@ 24 H

R - PUM

P30 SEC

@ 2 W

K - PUM

P

OFF O

NJumper

(or to “T T” onswitching relay)



Dry Contacts To:“T T” on Boileror SwitchingRelay

LOW HIGH

T

NOTE: For 4 minuteon delay of Heating Fan,switch 1 and 3 MIN ONDELAY to ON position.

50


THERMOSTAT





T T

BOILER AIR HANDLER

G GX X C R Y





Hot

Neutral

Circulator

XXPUMP


1 MIN

ON

DELA

Y - FAN

3 MIN

ON

DELA

Y - FAN

2 MIN

@ 24 H

R - PUM

P30 SEC

@ 2 W

K - PUM

P

OFF O

N




“T T” on Boileror SwitchingRelay M

Low

Hig

h

Line

24 V

AC

Fan

Rela

ysLOW HIGH

T

NOTE: For 4 minuteon delay of Heating Fan,switch 1 and 3 MIN ONDELAY to ON position.

51

Mul

tiple

HAF

C’s

and

Switc

hing

Rel

ay

FOU

R Z

ON

E SW

ITC

HIN

G R

ELA

Y W

ITH

OPT

ION

AL

PRIO

RITY

ZO

NE

4 ON

OFF

PRIO

RITY

120V

REL

AY

FUSE

1 A

MP

24 V

AC

POW

ER

ZO

NE

1Z

ON

E 2

ZO

NE

3Z

ON

E 4

120

VAC

INPU

T

TO:

"TT"

ON

BO

ILER

120

VOLT

CIR

CU

LATO

RSZ

C

ZR

X

XEN

DSW

ITC

H

ZO

NE1

Z

ON

E2

ZO

NE3

Z

ON

E4PO

WER

INPU

T

ZO

NE

2

POW

ERZ

ON

E 1

ZO

NE

3Z

ON

E 4

JUM

PER

BO

ILE

R

H N

SR 5

04

DH

WH

EATE

RA

QU

AST

AT

THER

MO

STA

T

POW

ER P

MC

ALL

FO

R H

EAT

FAN

, CO

OLI

NG

FAN

, HEA

TIN

G

OU

TDO

OR

CO

ND

ENSE

RU

NIT

TT

BOIL

ERA

IR H

AN

DLE

R

GG

XX

CR

Y

CR

GY

TW

THER

MO

STA

TAQ

UAS

TAT

HA

FC10

1H

YDRO

AIR

FA

N C

ON

TRO

L

M

Low

High

Line24 VAC

FanRelays

LOW

HIG

H

THER

MO

STAT

TT

BOIL

ERA

IR H

AN

DLE

R

GG

XX

CR

Y

CR

GY

TW

THER

MO

STA

TAQ

UAS

TAT

HA

FC10

1H

YDRO

AIR

FA

N C

ON

TRO

L

M

Low

High

Line24 VAC

FanRelays

LOW

HIG

H

2 SP

EED

AIR

HA

ND

LER

THER

MO

STAT

TT

BOIL

ERA

IR H

AN

DLE

R

GG

XX

CR

Y

CR

GY

TW

THER

MO

STA

TAQ

UAS

TAT

HA

FC10

1H

YDRO

AIR

FA

N C

ON

TRO

L

M

Low

High

Line24 VAC

FanRelays

LOW

HIG

H

OPT

ION

AL

POW

ER W

IRE

TO T

HER

MO

STA

TTH

AT

REQ

UIR

ES 2

4VA

C

OPT

ION

AL

POW

ER W

IRE

TO T

HER

MO

STA

TTH

AT

REQ

UIR

ES 2

4VA

C

OPT

ION

AL

POW

ER W

IRE

TO T

HER

MO

STA

TTH

AT

REQ

UIR

ES 2

4VA

C

TO: A

QU

AST

AT

ON

RETU

RN L

INE

OF

HYD

RO C

OIL

TO: A

QU

AST

AT

ON

RETU

RN L

INE

OF

HYD

RO C

OIL

TO: A

QU

AST

AT

ON

RETU

RN L

INE

OF

HYD

RO C

OIL

OU

TDO

OR

CO

ND

ENSE

RU

NIT

OU

TDO

OR

CO

ND

ENSE

RU

NIT

2 SP

EED

AIR

HA

ND

LER

2 SP

EED

AIR

HA

ND

LER

POW

ER P

MC

ALL

FO

R H

EAT

FAN

, CO

OLI

NG

FAN

, HEA

TIN

G

POW

ER P

MC

ALL

FO

R H

EAT

FAN

, CO

OLI

NG

FAN

, HEA

TIN

G

TT

T

52

3 Wire Thermostat Connected to TACO Switching Relay

BOILER

H

N

TT

T


ZONE 4

ONOFF

PRIORITY

120V RELAY

FUSE 1 AMP

24 VACPOWER


120 VAC INPUT

TO: "TT" ON BOILER


X XEND

SWITCH


INPUT

SR 504

ZONE 2

POWERZONE 1

ZONE 3ZONE 4

JUMPER

T

W R

COM

3 WIRETHERMOSTAT

3 Wire Thermostat Connected to TACO Zone Valve Control

ZONE 1 ZONE 2 ZONE 3 ZONE 4 ZONE 5T T T T T T T T T T

ZVC 405

1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4ZONE 1 ZONE 2 ZONE 3 ZONE 4 ZONE 5


JUMPER3 & 4

3 WIRE ZONE VALVE(TACO TYPE)

123

MOTOR ENDSWITCH


4 WIRE ZONE VALVE(HONEYWELL TYPE)

T STAT 1

VALVE 1

T STAT 2



FIVE ZONE ZONE VALVE CONTROL

24 VAC

FA

CTO

RYIN

STA

LLED

TRA

NSF

ORM

ER

120 VACINPUT

WHITE

BLACK

ENDSWITCH

TT

TO T&T ON BOILEROR PUMP RELAY

POW

ER IN

24 VAC

FA

CTO

RYIN

STA

LLED

TRA

NSF

ORM

ER

120 VACINPUT

WHITE

BLACK

BLA

CK

RED

BLA

CK

RED

WH

RED

CO

MM

ON

W RC

T T T

53

Whi

te-R

oger

s 13

61 H

ydro

nic

Zone

Val

ve w

ith T

ACO

Zone

Val

ve C

ontro

l

ZO

NE

1Z

ON

E 2

ZO

NE

3Z

ON

E 4

ZO

NE

5T

TT

TT

TT

TT

T

ZVC

40

5

12

34

12

34

12

34

12

34

12

34

ZO

NE

1Z

ON

E 2

ZO

NE

3Z

ON

E 4

ZO

NE

5

WH

ITE-

ROG

ERS

1361

HYD

RON

IC Z

ON

E VA

LVE

3

3 W

IRE

ZO

NE

VALV

E(T

AC

O T

YPE)

1 2 3

MO

TOR

END

SWIT

CH

THER

MO

STA

TTH

ERM

OST

AT

THER

MO

STA

T

4 W

IRE

ZO

NE

VALV

E(H

ON

EYW

ELL

TYPE

)

T ST

AT

1

VALV

E 1

T ST

AT

2

VALV

E 2

T ST

AT

3VA

LVE

3T

STA

T 4

VALV

E 4

T ST

AT

5VA

LVE

5PO

WER

FIVE

ZO

NE

ZO

NE

VALV

E C

ON

TRO

L

24

VAC

FACTORYINSTALLED

TRANSFORMER

120

VA

CIN

PUT

WH

ITE

BLA

CK

END

SWIT

CH

T TTO

T&

T O

N B

OIL

ERO

R PU

MP

RELA

Y

POWER IN

24

VAC

FACTORYINSTALLED

TRANSFORMER

120

VA

CIN

PUT

WH

ITE

BLA

CK

BLACK

RED

BLACK

RED

RIG

HT

TTSC

REW

(SEE

NO

TE)

41

2

NO

TE: W

HEN

USI

NG

ZVC

404

OR

ZVC

406

,C

ON

NEC

T W

IRE

#2 O

F Z

ON

E VA

LVE

TO P

RIO

RITY

ZO

NE

RIG

HT

TT S

CRE

W

TT

T

3

TE

RM

INA

L A

SS

IGN

ME

NT

ZO

NE

VA

LVE

CO

NT

RO

L1

12 3

TT (R

t)

42

54

Hone

ywel

l VC

40 &

80

(spd

t) Hy

dron

ic Z

one

Valve

with

TAC

O Zo

ne V

alve

Con

trol

ZO

NE

1Z

ON

E 2

ZO

NE

3Z

ON

E 4

ZO

NE

5T

TT

TT

TT

TT

T

ZVC

40

5

12

34

12

34

12

34

12

34

12

34

ZO

NE

1Z

ON

E 2

ZO

NE

3Z

ON

E 4

ZO

NE

5

HO

NEY

WEL

L VC

(SP

ST)

HYD

RON

IC Z

ON

E VA

LVE

SERI

ES 4

0 &

801

3 W

IRE

ZO

NE

VALV

E(T

AC

O T

YPE)

1 2 3

MO

TOR

END

SWIT

CH

THER

MO

STA

TTH

ERM

OST

AT

THER

MO

STA

T

4 W

IRE

ZO

NE

VALV

E(H

ON

EYW

ELL

TYPE

)

T ST

AT

1

VALV

E 1

T ST

AT

2

VALV

E 2

T ST

AT

3VA

LVE

3T

STA

T 4

VALV

E 4

T ST

AT

5VA

LVE

5PO

WER

FIVE

ZO

NE

ZO

NE

VALV

E C

ON

TRO

L

24

VAC

FACTORYINSTALLED

TRANSFORMER

120

VA

CIN

PUT

WH

ITE

BLA

CK

END

SWIT

CH

T TTO

T&

T O

N B

OIL

ERO

R PU

MP

RELA

Y

POWER IN

24

VAC

FACTORYINSTALLED

TRANSFORMER

120

VA

CIN

PUT

WH

ITE

BLA

CK

BLACK

RED

BLACK

RED

RIG

HT

TTSC

REW

(SEE

NO

TE)

46

23

NO

TE: W

HEN

USI

NG

ZVC

404

OR

ZVC

406

,C

ON

NEC

T W

IRE

#3 O

F Z

ON

E VA

LVE

TO P

RIO

RITY

ZO

NE

RIG

HT

TT S

CRE

W

TT

T

TE

RM

INA

L A

SS

IGN

ME

NT

ZO

NE

VA

LVE

CO

NT

RO

LO

RA

NG

E1

3B

LUE

2B

RO

WN

31

GR

AY4

4B

LAC

K6

2

TT (R

t)

570 Zone Valve to Switching Relay


24 VACPOWER

FUSE 1 AMP

120 VOLTCIRCULATORS


N P ZC H X ZR1

X2


ZONE 2

POWERZONE 1

ZONE 3

TO: 120 VAC POWER (NEUTRAL)

TO: 120 VAC POWER (HOT)



T

1

2

3

24 VACTRANSFORMER

THERMOSTAT

55

56

Zone

Val

ve C

ontro

l with

1 L

ow T

empe

ratu

re Z

one

Usin

g Pr

iorit

y Zo

ning

Circ

ulat

or

24 V

AC

ZO

NE

1Z

ON

E 2

ZO

NE

3Z

ON

E 4

ZO

NE

5Z

ON

E 6

MO

DE

NO

RMA

LRE


TT

TT

TT

TT

TT

TT

ZO

NE

6 PR

IORI

TY

OFF

ON

ZVC

40

6

12

34

12

34

12

34

12

34

12

34

ZO

NE

1Z

ON

E 2

ZO

NE

3Z

ON

E 4

ZO

NE

5

JUM

PER

3 &

4

TAC

O3

WIR

E Z

ON

E VA

LVE

1 2 3

END

SWIT

CH

THER

MO

STA

TTH

ERM

OST

AT

THER

MO

STA

T

4 W

IRE

ZO

NE

VALV

E(P

OW

ER O

PEN

,SE

LF C

LOSI

NG

)

T ST

AT

1

VALV

E 1

T ST

AT

2

VALV

E 2

T ST

AT

3VA

LVE

3T

STA

T 4

VALV

E 4

T ST

AT

5VA

LVE

5T

STA

T 6

VALV

E 6

POW

ER

SIX

ZO

NE

ZO

NE

VALV

E C

ON

TRO

LW

ITH

OPT

ION

AL

PRIO

RITY

24

VAC

FACTORYINSTALLED

TRANSFORMER

120

VA

CIN

PUT

WH

ITE

BLA

CK

POWER IN

24

VAC

FACTORYINSTALLED

TRANSFORMER

120

VA

CIN

PUT

WH

ITE

BLA

CK

N/O

CO

MZ

ON

E 6

RELA

Y

DRY

CO

NTA

CTS

END

SWIT

CH

EXTR

AEN

DSW

ITC

H

MA

INN

/C

TO B

OIL

ER A

QU

AST

AT

RELA

Y

BO

ILE

R

HN

SYST

EMPU

MP

AA

QU

AST

AT

ON

DH

W H

EATE

R

SYST

EM P

UM

P A

ND

BO

ILER

TU

RN O

NW

HEN

AN

Y Z

ON

E VA

LVE

OPE

NS.

12

34

ZO

NE

6

PRIO

RITY

ZO

NE

JUM

PER

3 &

4S

EE

NO

TE

Not

e: W

hen

a ci

rcul

ator

isus

ed o

n th

e pr

iorit

y zo

nein

stea

d of

a z

one

valv

e,ju

mpe

r 3

and

4 of

the

prio

rity

zone

.

TT

T

MO

TOR

MO

TOR

END

SWIT

CH

4 W

IRE

ZO

NE

VALV

E(P

OW

ER O

PEN

,SE

LF C

LOSI

NG

)

ON

OFF

PRIO

RITY

POW

ER IN

120

VAC

INPU

T

TH

ERM

OST

AT

BO

ILER

PR

IORI

TY

PRIO

RITY

ZO

NIN

G C

IRC

ULA

TOR

PR-IN

PR-O

UT

LIVE

NEU

T1

23

4

PRIO

RITY

ON

Back ofControl

MENU ITEM

RADIANT MIXING BLOCK

PATENT PENDING RMB-1UL

Power: 120 V + 10%50/60 Hz, 750 VAVar. Speed: 120 V(ac) 1 APmp Relay: 120 V(ac) 5 A, 1/6 hp

Use copperconductors only

Meets Class B:Canadian ICESFCC Part 15

Com SysRet

Boil Out HeatDem

Boiler

HN

C US158033

Com Com

Sys

Y R BMan

R

SupplySensor

BoilerSensor

OutdoorSensor

Boiler

InjectionCirculator

RadiantCirculator

Line Cord

To Zone

Control End

Switchor

Thermostat

Off-Enable On-ControlBoiler Operation

Sup

Var

Pump

Fuse

Front ofControl

SupplySensor

Boiler Sensor

Outdoor

SensorH

N

ComSup Boil Out HeatDem

Com Com

Boiler

SysRet

RMBBack of Control

H

N

Power

Input

Thermostat

(Dry Contact)

N


Pump

High Mass Boiler

T

Radiant Mixing Block, Single Zone

Radiant Mixing Block (RMB)

FOR ADDITIONAL WIRING DIAGRAMS, PLEASE SEE www.taco-hvac.com/wiringwizard57

Radiant Mixing Block Connected to Zone Valve Control with System Pump Wired off the RMB

Radiant Mixing Block Connected to 2 EXP Switching Relays with DHW Pump

SupplySensor

Boiler Sensor

MM

H

N

Com Sup Boil Out HeatDem

Com Com

Boiler

SysRet

RMBBack of Control

Power

Input

N

THREE ZONE ZONE VALVE CONTROL

ZVC 403

1 2 3 4ZONE 1

1 2 3 4ZONE 2

1 2 3 4ZONE 3E ND

SWITCH

ZONE 1T T

ZONE 2T T

ZONE 3T T

FUSE(5 AMP MAX)

N/O N/CCOM

POW

ER IN


Fact

ory

Inst

alle

dTr

ansf

orm

er

Pump

Outdoor

Sensor

ThermostatsT T

H

N

Moto

r

End S

witch

Moto

r

End S

witch


SR503-EXP

FUSE 1 AMP

24 VACPOWER

ON

OFF

ZONE 3PRIORITY

RESET NORMAL

POWER CONTROLINTERFACE

MASTER

SLAVE

1 2 3 4EXPANSION

PLUG-IN CARDS

ZONE3ZONE2ZONE1

INPUT120 VOLT CIRCULATORSPOWERZONE3ZONE2ZONE1ZRZCEND

SWITCH

X X


SR503-EXP

FUSE 1 AMP

24 VACPOWER

ON

OFF

ZONE 3PRIORITY

RESET NORMAL

POWER CONTROLINTERFACE

MASTER

SLAVE

1 2 3 4EXPANSION

PLUG-IN CARDS

ZONE3ZONE2ZONE1

INPUT120 VOLT CIRCULATORSPOWERZONE3ZONE2ZONE1ZRZCEND

SWITCH

X X

Boiler Sensor

SupplySensor

OutdoorSensor

H

N


Com Com

Boiler

SysRet

RMBBack of Control


Power CordA

Pump

N

Thermostats

T

T

Thermostats

T

T

H

N

Power

Input

DHW

DHWCirc.

Aquastat


Back ofControl

MENU ITEM

X – PUMP BLOCK

PATENT PENDING XPB-1UL

Power: 120 V + 10%50/60 Hz, 750 VAVar. Speed: 120 V(ac) 1 APmp Relay: 120 V(ac) 5 A, 1/6 hp

Use copperconductors only

Meets Class B:Canadian ICESFCC Part 15

Com SysRet

Boil Out HeatDem

Boiler

HN

C US158033

Com Com

Sys

Y R BMan

R

SystemSupplySensor

HeatSourceSensor

OutdoorSensor

Heat Source

Variable Speed CirculatorHeating: Heat Source CirculatorSnowmelt: System Circulator

Constant Speed CirculatorHeating: System CirculatorSnowmelt: Heat Source Circulator

Line Cord

To Zone

Control End Switch

or Thermostat

(Relay orMechanical

Type)


Sup

Var

Pump

Fuse

Front ofControl

ManualOperationSwitch

X - Pump Block, Single Zone

Input from

Heat Source

Output to

System

HEAT

SOURCE Supply

Sensor

Exp

Tank

Pressure

Relief

H

N


Com ComSysRet

XPBBack of Control

Off-Enable On-Control

Boiler Operation

Power

Cord

Thermostat

(Relay or Mechanical Type)Pump

Outdoor

Sensor

Boiler

T

X - Pump Block (XPB)


60

FOUR ZONE ZONE VALVE CONTROLWITH OPTIONAL PRIORITY

OFFON

ZONE 4 PRIORITYMODERESET

ZVC 404

1 2 3 4ZONE 1

1 2 3 4ZONE 2

1 2 3 4ZONE 3

1 2 3 4ZONE 4

ZONE 4 RELAYN/O N/CCOMEXTRA

ENDSWITCH

MAINEND

SWITCH

ZONE 1T T

ZONE 2T T

ZONE 3T T

ZONE 4T T

NORMAL

FUSE(3 AMP MAX)

POWER IN

H

N


Com ComSysRet

Power

Input

Power

Cord

Radiant Manifold - Supply

Radiant Manifold - Return

X - Pump Block Connected to Zone Valve Control

Output to

System

Exp

Tank

Pressure

Relief

Supply

Sensor

XPBBack of Control


Pump

Outdoor

Sensor

Boiler

H N

FactoryInstalled

Transformer

HEAT

SOURCE

TT

T

Input fromHeat Source

H

N


Com ComSysRet

Power

Input

N P ZC H X1 ZRX2

FUSE 1 AMP

24 VACPOWER

TWO ZONE SWITCHING RELAY

SR 502 ZONE1 ZONE2

ZONE1 ZONE2

N P ZC H X1 ZRX2

FUSE 1 AMP

24 VACPOWER

TWO ZONE SWITCHING RELAY

SR 502 ZONE1 ZONE2

ZONE1 ZONE2

Power

Cord

Power

Input

Input fromHeat Source

Output to System

SupplySensor

ReturnSensor

ExpTank

PressureRelief

X - Pump Block Connected to 2 SR502/503 Switching Relays

XPBBack of Control


Pump

Outdoor

Sensor

Boiler

H

N

H

N

T

TT

T

FOR ADDITIONAL WIRING DIAGRAMS, PLEASE SEE www.taco-hvac.com/wiringwizard

Typical Radiant Floor to Water Heater Installation

ColdSupply

MIXH

C

ASSE 1017Tempering

Valve

DomesticHot

Supply

RADIANTSYSTEM

(Secondary Sideof the System)

X-PUMPBLOCK

ColdHot

WATERHEATER

CheckValve

Supply

Return

Exp.Tank

ReliefValve

AirSeparator

WARNING! A pressure relief valve and expansion tank must be installed on the secondaryside in addition to any pressure relief valve and expansion tank which is installed on primaryside of system. Use dedicated supply and return piping to the X-Pump Block from the waterheater so as not to add heated water into the house’s cold water piping.

Typical Snow Melt Installation

SNOW MELTSYSTEM

X-PUMPBLOCK

Supply

Return

Exp.Tank

ReliefValve

AirSeparator

Exp.Tank

Separator

FIXED SPEEDCIRCULATOR(4 PIN PLUG)

VARIABLE SPEEDCIRCULATOR(3 PIN PLUG)

HEATSOURCE

(Tb)

(Ts)

Note 1: There must be no more than 4 pipe diameters between the tees in the boiler andsystem loops in order to prevent ghost flow when the variable speed injectionpump is off and either the boiler pump or system pump is on.

Note 2: There must be at least 6 pipe diameters of straight pipe on either side of the tees inorder to prevent the momentum of water in the boiler and system loops from pushingflow through the injection loop.

Note 3: There should be a minimum 1 foot drop to create a thermal trap in order to preventconvective heat transfer through the injection loop.

(ΔTs)

{Note 1 Note 2

Not

e 3

{

{

Not

e 3

{

Not

e 2

{

Not

e 1

}

HEAT SOURCERETURN SENSOR

(OPTIONAL)

SYSTEMSUPPLYSENSOR

SYSTEMRETURNSENSOR

Tb = Boiler Supply Temperature

Ts = System Supply Temperature

ΔTs = System Temperature Drop(typically 20°F for convectorsand 10°F for radiant floor heating)

61

62

Back ofControl

iSeries-R

BA

24 Volt

Transformer

N

H Power

Input

C R

24 VACPOWER INPUT

SENSOR COMMON

BOILER SUPPLY OUTDOOR

POWERGREEN

SENSORERROR

RED

BACK OF iVALVE-R MIXING VALVE ACTUATOR

iValve, 2-Way Injection, Single Zone

Outdoor

Sensor

Supply

SensorBoiler

Sensor

ThermostatT

H 3 54N/O4

N/C6

N/ON N/C6

SR5011 ZONE

SWITCHING RELAY

120 VACINPUT

TT COM

WR 24VAC

EndSwitch

OutdoorSensor

SystemSupplySensor

BoilerReturnSensor

SENSOR COMMON

C R

24 VACPOWER INPUT

BOILERPOWERGREEN

SENSORERROR

RED

SUPPLY

OUTDOOR

iSeries Mixing Valve

iValve-R

SystemSupplySensor

BoilerReturnSensor(optional)

24 V (ac)Transformer

iValve-S

or

Back ofControl

EndSwitch

SENSOR COMMON

C R

24 VACPOWER INPUT

BOILERPOWERGREEN

SENSORERROR

RED

SUPPLY

SETBACK

24 V (ac)Transformer

orSetback

Input


63

iSe

ries-R

BC

A

BC

ASupply

Sensor

N P ZC H X1 ZRX2

ZONE1 ZONE2 ZONE3

ZONE1 ZONE2 ZONE3

FUSE 1 AMP

24 VACPOWER


SR 503

24 V

olt

Tra

nsfo

rmer

H N

Power

Input

C R

24 VACPOWER INPUT

SENSOR COMMON


POWERGREEN

SENSORERROR

RED

BACK OF iVALVE-R MIXING VALVE ACTUATOROutdoor

Sensor

DHWCirc.

ADHW Aquastat

Thermostats

T

T

iValve, 3-Way Mixing Working with SR502/503 Switching Relay with DHW Priority

24 V

olt

Tran

sfor

mer

C R

24 VACPOWER INPUT

SENSOR COMMON


POWERGREEN

SENSORERROR

RED

BACK OF iVALVE-R MIXING VALVE ACTUATOR

MM

H

N

THREE ZONE ZONE VALVE CONTROL

ZVC 403

1 2 3 4ZONE 1

1 2 3 4ZONE 2

1 2 3 4ZONE 3E ND

SWITCH

ZONE 1T T

ZONE 2T T

ZONE 3T T

FUSE(5 AMP MAX)

N/O N/CCOM

iValve, 4-Way Mixing Working with Zone Valve Control

iSeries-R

Fact

ory

Inst

alle

dTr

ansf

orm

er

POW

ER IN

ThermostatsT

T

Mo

tor

En

d S

witch

Mo

tor

En

dS

witch

PowerInput

OutdoorSensor

BoilerSensor

SupplySensor

Boiler

Sensor


64

Wiring for Boilers with Honeywell Control Center Model R8285 or Equivalent

TACO LTR0243T-1

YELREDWH YELGRNFACTORYWIRING

MALECONNECTOR

GROUNDCONNECTION

FEMALECONNECTOR

GASVALVE

120VAC

TACO LTR0243T-1

YELREDWH YELGRN

LIMITCONTROLS

24 VACCLASS 2

TRANSFORMER

24 VAC

HOT

COMMON

AlternateWiring

65

INTEGRATED BOILERCONTROL

BOILER MODULEWIRING HARNESS

MALECONNECTOR

FEMALECONNECTOR

FACTORY WIRING

Wiring Boilers with a United Technologies Integrated Control Module and a Taco LTR0243U-1

Wiring Boilers with a United Technologies Ucontrol or other Integrated Control Moduleswhich accept a 4-pin harness and a Taco LTR0243L-1

4-PIN CONNECTOR (#2)

4-PIN CONNECTOR (#1)

WIRING HARNESS

INTEGRATEDCONTROLMODULE

Wiring Instructions

1. Plug the 4-pin connector on the wiring harness (#1 as shown) into the integrated control module.

2. Plug the 4-pin connector on the wiring harness (#2 as shown) into the LTR.

Wiring Taco LN and LTA-2 Series Low Water CutoffsUsing Burner Circuit Power Source

*

*Factory Installed

66

Wiring Taco LN and LTA-2 Series Low Water CutoffsUsing Power Source Other Than Burner Circuit

NOTE: For 24 VAC models, LNA024xx and LTA0243S-2, 24 VAC tobe supplied by an EXTERNAL Class 2 power source to terminalsH and N. For 120 VAC models, LNA120xx and LTA1203S-2, 120 VACis supplied by an external circuit to terminals H and N.

NOTE: For 24 VAC models, LNA024xx and LTA0243S-2, 24 VAC tobe supplied by an EXTERNAL Class 2 power source to terminalsH and N. For 120 VAC models, LNA120xx and LTA1203S-2, 120 VACis supplied by an external circuit to terminals H and N.

67

Wiring Taco LT Series (1st generation, -1) Low Water CutoffsUsing Burner Circuit Power Source

**Factory Installed

Wiring Taco LT Series (1st generation, -1) Low Water CutoffsUsing Power Source Other Than Burner Circuit

NOTE: For 24 VAC models, LTx024xx-1, 24 VAC to be suppliedby an EXTERNAL Class 2 power source to terminals H and N.For 120 VAC models, LTx120xx-1, 120 VAC is supplied by anexternal circuit to terminals H and N.

NOTE: For 24 VAC models, LTx024xx-1, 24 VAC to be suppliedby an EXTERNAL Class 2 power source to terminals H and N.For 120 VAC models, LTx120xx-1, 120 VAC is supplied by anexternal circuit to terminals H and N.

68

Wiring Taco LF Series Low Water Cutoffs Using Burner Circuit Power Source

Wiring Taco LF Series Low Water Cutoffs Using Power Source Other Than Burner Circuit

NOTE: Remote probe available on remote probe models only.

NOTE: For 24 VAC models, LFx024xx, 24 VAC to be supplied by an EXTERNAL Class 2 power source to terminals H and N.For 120 VAC models, LFx120xx, 120 VAC is supplied by an external circuit to terminals H and N.

NOTE: For 24 VAC models, LFx024xx, 24 VAC to be supplied by an EXTERNAL Class 2 power source to terminals H and N.For 120 VAC models, LFx120xx, 120 VAC is supplied by an external circuit to terminals H and N.

69

Taco Low Water Cutoff Replacement Guide

Bold / Italics Indicates Discontinued Part Number

Taco McDonnell & Miller Hydrolevel Honeywell

LFA1203S-1LTA1203N-1LTA1203S-1

PS-801-120PSE-801-120PS-800-120PS-850-120900900C

450CG450CGT450OEM170TD

RW700A1031RW700A1056RW700A1080

LFM1203S-1LTM1203N-1LTM1203S-1

PS-801-M-120PS-851-M-120PS-851-SP-M-120PS-850-M-120900M901M902M

550550SV750OEM170MCOEM170M

RW700B1054RW700B1039RW700B1021

LFA0243S-1LTA0243N-1LTA0243S-1

PS-802-24PSE-802-24 PS-800-24PS-850-24

400CG400OEM24TD

RW700A1098

LFM0243S-1LTM0243N-1LTM0243S-1

PS-802-M-24PS-852-M-24PS-852-SP-M-24PS-850-M-24

500500SV700OEM24MC

LFA1203R-1LTA1203R-1

750-T-120750-120

650R

LFM1203R-1LTM1203R-1

750-MT-120750-M-120

550R


PS-851-RX2-120 650R

LFM1202R-1LTM1202R-1

PS-851-M-RX2-120 550R


PS-802-RX2-24 400R

LTA0243S-2LNA0243S-1

PS-852-24PS-852-SP-24750-MT-SP-24750P-MT-24750P-MT-U-24

2424SV600600SVOEM24C

LTA1203S-2LNA1203S-1

RB-120RB-122EPS-851-120PS-851-SP-120750P-MT-120750P-MT-SP-120750P-MT-U-120901RB-120IIRB-122

170170SV1150650650SVOEM170COEM170

RW700A1007RW700A1006

LTR0243T-1RB-24ERB-24

1100

P3R-1RS-1-BR-1RS-1-LPRS-1-LP-S

EL1214-R

EWF120

WFE-120WF2-U-120VWF-2-120WF-4-120

VRTX-120V-120-1&2 VW400A1004

EWF024

WFE-24WF2-U-24VWF-2-24WF-4-24

VRTX-24V-24-1&2 VW800A1004

70

Taco LF Series 120 Volt LWCO Competitive Wiring Cross Reference

120 VAC Models with 120 VAC Burner Circuits

TACO LFx120x

NC COMNO H N GND P

BURNERCIRCUIT

HOT

NEUTRAL

120 VACCIRCUIT

McDONNELL & MILLERPS-801/851-120

w/Red & Amber LEDsSeries 750

1 2 3 4 5

BURNERCIRCUIT

HOT

NEUTRAL

120 VACCIRCUIT

HYDROLEVEL450, 550, 650 & 750

2 1 P1 P2 A

BURNERCIRCUIT

HOT

NEUTRAL

120 VACCIRCUIT

N H C W B

BURNERCIRCUIT

HOT

NEUTRAL

120 VACCIRCUIT


w/Red & Green LEDs

FACTORYINSTALLED

JUMPER


TACO LFx120x

NC COMNO H N GND P

BURNERCIRCUIT

HOT

NEUTRAL

120 VACCIRCUIT


w/Red & Amber LEDsSeries 750

1 2 3 4 5

HYDROLEVEL450, 550, 650 & 750

2 1 P1 P2 A

BURNERCIRCUIT

HOT

NEUTRAL

120 VACCIRCUIT

N H C W B


w/Red & Green LEDs

24 VACTRANSFORMER

24 VACTRANSFORMER

BURNERCIRCUIT

HOT

NEUTRAL

120 VACCIRCUIT

24 VACTRANSFORMER

BURNERCIRCUIT

HOT

NEUTRAL

120 VACCIRCUIT

24 VACTRANSFORMER

71

Taco LF Series 24 Volt LWCO Competitive Wiring Cross Reference


TACO LFx024x

NC COMNO H N GND P

BURNERCIRCUIT

HOT

NEUTRAL

24 VACCIRCUIT

HYDROLEVEL400, 500, 600 & 700

2 1 P1 P2 A

BURNERCIRCUIT

HOT

NEUTRAL

24 VACCIRCUIT

N H C W B

BURNERCIRCUIT

HOT

NEUTRAL

24 VACCIRCUIT


FACTORYINSTALLED

JUMPER


TACO LFx024x

NC COMNO H N GND P

BURNERCIRCUIT

HOT

NEUTRAL

120 VACCIRCUIT

HYDROLEVEL400, 500, 600 & 700

2 1 P1 P2 A

BURNERCIRCUIT

HOT

NEUTRAL

120 VACCIRCUIT

N H C W B


24 VACTRANSFORMER

24 VACTRANSFORMER

BURNERCIRCUIT

HOT

NEUTRAL

120 VACCIRCUIT

24 VACTRANSFORMER

72

Taco LTA-2 Series 120 Volt LWCO Competitive Wiring Cross Reference


TACO LTA1203S-2

N H COM NC NO

BURNERCIRCUIT

HOT

NEUTRAL

120 VACCIRCUIT

RB-120

1 2 3 4 5

BURNERCIRCUIT

HOT

NEUTRAL

120 VACCIRCUIT

RB-122E

N H B C

BURNERCIRCUIT

HOT

NEUTRAL

120 VACCIRCUIT

GN H P1 P2 A

BURNERCIRCUIT

HOT

NEUTRAL

120 VACCIRCUIT

HYDROLEVEL 170McDONNELL & MILLER

FACTORYINSTALLED

JUMPER

McDONNELL & MILLER

H NCUT-OFF

BURNERCIRCUIT

HOT

NEUTRAL

120 VACCIRCUIT

HYDROLEVEL 1150


TACO LTA1203S-2

N H COM NC NO

RB-120

1 2 3 4 5

RB-122E

N H B C GN H P1 P2 A

HYDROLEVEL 170SV

BURNERCIRCUIT

HOT

NEUTRAL

120 VACCIRCUIT

24 VACTRANSFORMER

BURNERCIRCUIT

HOT

NEUTRAL

120 VACCIRCUIT

24 VACTRANSFORMER

BURNERCIRCUIT

HOT

NEUTRAL

120 VACCIRCUIT

24 VACTRANSFORMER

BURNERCIRCUIT

HOT

NEUTRAL

120 VACCIRCUIT

24 VACTRANSFORMER

McDONNELL & MILLER

McDONNELL & MILLER

H NCUT-OFF

HYDROLEVEL 1150

BURNERCIRCUIT

HOT

NEUTRAL

120 VACCIRCUIT

24 VACTRANSFORMER

73

Taco LTR and LTA-2 Series 24 Volt LWCO Competitive Wiring Cross Reference


TACO LTA0243S-2

N H COM NC NO

BURNERCIRCUIT

HOT

NEUTRAL

24 VACCIRCUIT

RB-24E

BURNERCIRCUIT

HOT

NEUTRAL

24 VACCIRCUIT

HYDROLEVEL 1100

BURNERCIRCUIT

HOT

NEUTRAL

24 VACCIRCUIT

YellowWire

YellowWire

WhiteWire

RedWire

YellowWire

YellowWire

WhiteWire

RedWire

McDONNELL & MILLER

FACTORYINSTALLED

JUMPER

TACO LTR0243T-1

BURNERCIRCUIT

HOT

NEUTRAL

24 VACCIRCUIT

YellowWire

YellowWire

WhiteWire

RedWire

2 1 P1 P2 A

BURNERCIRCUIT

HOT

NEUTRAL

24 VACCIRCUIT

JUMPER

HYDROLEVEL 24


TACO LTA0243S-2

N H COM NC NO

BURNERCIRCUIT

HOT

NEUTRAL

120 VACCIRCUIT

24 VACTRANSFORMER

HYDROLEVEL 24

2 1 P1 P2 A

BURNERCIRCUIT

HOT

NEUTRAL

120 VACCIRCUIT

24 VACTRANSFORMER

74

Wiring Taco LF Series Low Water Cutoffsto Taco Electric Water Feeder with the Same Voltages

NC NO COM H N

T a c o L F x 1 2 0 x / L F x 0 2 4 x

GND P

B U R N E RC I R C U I T

H O T

N E U T R A L

HN

T a c o E W F 1 2 0 / E W F 0 2 4

LW

1 2 0 V A C / 2 4 V A C

C IR C U IT

EWF Standard Wiring

FACTORYINSTALLED

JUMPER

Wiring Taco LF Series Low Water Cutoffsto Taco Electric Water Feeder with Different Burner Voltages

NC NO H N

Taco L F x1 2 0 x

GND P

B UR NE RCIRC UIT 12 0 V A C

C IR C U IT

HO T

NE U TR AL

H N

Ta co E W F0 24

LW24 V AC

C IR C U IT

HO T

NE U TR AL

Taco LFx 02 4 x

B UR NE RCIRC UIT

12 0 V A CC IR C U IT

HO T

NE U TR AL

H N

Ta co E W F1 20

LW

24 V ACC IR C U IT

HO T

NE U TR AL

* *

* N O T E : R em o ve f ac tor y i n s ta lled

ju m per b etw een H and C O M te rm in a ls

EWF Alternate Wiring

NC COMNO H N GND PCOM

75

Wiring Taco 24VAC Electric Water Feeder to Taco LF Series 24VAC Low Water Cutoffor 24VAC McDonnell & Miller or Hydrolevel Low Water Cutoffs

Taco LFx024x

Taco EW F 024

NC H N GND P

BURNERCIRCUIT

HOT

NEUTRAL

HNLW

24 V A CC IR C U IT

21P2H ydro level400, 50 0, 600, & 700

NHB M cDo nnel l & M il l er

P S-802 /852-24

NO TE : Wiring shown only for controland burner circuits of the sam evoltage. Som e term ina l designationsare not in their actual order on theLW COs.

** May be factory installed onsom e LW COsINSTALLED

JUMPER **

COMNO

P1A

CW

Wiring Taco 120VAC Electric Water Feeder to Taco LF Series 120VAC Low Water Cutoffor 120VAC McDonnell & Miller or Hydrolevel Low Water Cutoffs

NC NO H N GND P

BURNERCIRCUIT

HOT

NEUTRAL

HNLW

120 V A CC IR C U IT

NHWBM cDo n n ell & Mill er

P S-801 /851-120w /R ed & G r een L E D s

1 245M cDo n n ell & Mill er

P S-801 /851-120 w /Red &Am be r LE D s , S eries 750

21P2 AH ydro level450, 55 0, 650, & 750

Taco LFx120x

Taco EW F 120

NO TE : Wiring shown only for controland burner circuits of the sam evoltage. Som e term ina l designationsare not in their actual order on theLW COs.

** May be factory installed onsom e LW COs

INSTALLEDJUMPER **

COM

C

3

P1

76

Wiring TACO LTA-2 or LF Series 24VAC Low Water Cutoff toMcDonnell & Miller Series WF2 Uni-Match Electric Water Feeder

UNI-MATCHWATER FEEDER

MODEL WF2-U-24

24VACSUPPLY

50/60 HzH

N

N H COM NC NOAC POWER OUTPUT CONTACTS

N HW

1 2 3

BURNER

SWITCH POSITION #2

M&M23

0R

Remove jumper between H and COM if using power sourceother than burner circuit or when using mixed voltages.

Do not connect feeder to a manual reset LWCO.

Note on switch position:

Switch setting 1 (M&M), the feed cycle repeats indefinitely. Position 2 and 3 gives one feed cycle.

If using the LTA-2 series, choose whichever position best matches the application:

WF-2 switch to position 1- 60 sec. delay, 90 sec. feed, repeats

WF-2 switch to position 2- 90 sec. delay, 90 sec. feed


Wiring TACO LTA-2 or LF Series 120VAC Low Water Cutoff toMcDonnell & Miller Series WF2 Uni-Match Electric Water Feeder

UNI-MATCHWATER FEEDER

MODEL WF2-U-120

120VACSUPPLY

50/60 Hz H

N


N HW

1 2 3

BURNER

SWITCH POSITION #2

M&M23

0R

Note on switch position:

Switch setting 1 (M&M), the feed cycle repeats indefinitely. Position 2 and 3 gives one feed cycle.

If using the LTA-2 series, choose whichever position best matches the application:

WF-2 switch to position 1- 60 sec. delay, 90 sec. feed, repeats



24 VAC LWCO Using Burner Circuit Power Source

Remove jumper between H and COM if using power sourceother than burner circuit or when using mixed voltages.



77

Wiring TACO LF Series 24VAC Low Water Cutoff toHydrolevel VXT-24 Water Feeder (Non-Display Model)

SAFGARD VXT-24WATER FEEDER

24VACSUPPLY

50/60 Hz H

N


BURNER

Set Safgard as desired.

WHITE BLACK

Remove jumper between H and COM if usingpower source other than burner circuitor when using mixed voltages.


Wiring TACO LF Series 120VAC Low Water Cutoff toHydrolevel VXT-120 Water Feeder (Non-Display Model)

SAFGARD VXT-120WATER FEEDER

120VACSUPPLY

50/60 Hz H

N


BURNER


WHITE BLACK





78

Wiring TACO LTA-2 or LF Series 24VAC Low Water Cutoff toHydrolevel VXT-24 Programmable Water Feeder (Model with Display)

SAFGARD VRTX-24WATER FEEDER

24VACSUPPLY

50/60 Hz H

N


BURNER


WHITE REDBLACK



Wiring TACO LTA-2 or LF Series 120VAC Low Water Cutoff toHydrolevel VXT-120 Programmable Water Feeder (Model with Display)

SAFGARD VRTX-120WATER FEEDER

120VACSUPPLY

50/60 Hz H

N


BURNER


WHITE REDBLACK





Man

ufac

ture

rD

evic

e o

r S

erie

sP

ow

er C

onn

ecti

ons

Out

put

Co

ntac

tsR

emo

te P

rob

es

Ho

tN

eutr

alC

om

mo

nTo

Bur

ner

Cir

cuit

To E

WF’

s LW

Term

inal

/Ala

rmP

rob

eP

rob

eP

refe

renc

e

Taco

LF &

LT-

1 S

erie

sH

NC

OM

NC

NO

PG

ND

Taco

LTA

-2 &

LN

Ser

ies

HN

CO

MN

CN

O—

—

Taco

LTR

Ser

ies

Red

Wire

Whi

te W

ireYe

llow

Wire

Yello

w W

ire—

——

McD

onne

ll &

Mill

erP

S-8

01/8

51 (O

lder

Mod

els

w/R

ed &

Am

ber

LE

Ds)

12

35

4P

or

J2C

hass

is G

ND

McD

onne

ll &

Mill

erP

S-8

01/8

51 (N

ew M

odel

sw

/Red

& G

reen

LE

Ds)

HN

CB

WJ2

Cha

ssis

GN

D

McD

onne

ll &

Mill

erP

S-8

02/8

52 (O

lder

Mod

els

w/R

ed &

Am

ber

LE

Ds)

HN

CB

WJ7

Cha

ssis

GN

D

McD

onne

ll &

Mill

erP

S-8

02/8

52 (O

lder

Mod

els

w/R

ed &

Gre

en L

ED

s)H

NC

BW

J3C

hass

is G

ND

McD

onne

ll &

Mill

erS

erie

s 75

01

23

54

PC

hass

is G

ND

McD

onne

ll &

Mill

erR

B-1

22H

(Bla

ck W

ire)

N(W

hite

Wire

)C

(Yel

low

Wire

)B

(Yel

low

Wire

)—

——

McD

onne

ll &

Mill

erR

B-1

201

23

45

——

McD

onne

ll &

Mill

erR

B-2

4R

ed W

ireW

hite

Wire

Yello

w W

ireYe

llow

Wire

——

—

Hyd

role

vel

241

2P

1P

2A

——

Hyd

role

vel

170

HG

NP

1P

2A

——

Hyd

role

vel

1100

Red

Wire

Whi

te W

ireYe

llow

Wire

Yello

w W

ire—

——

Hyd

role

vel

1150

H(B

lack

Wire

)N

(Whi

te W

ire)

CU

T-O

FF(Y

ello

w W

ire)

CU

T-O

FF(Y

ello

w W

ire)

——

—

Hyd

role

vel

400,

500

, 60

0, 7

00,

450,

550,

650

, 75

01

2P

1P

2A

H3

Cha

ssis

GN

D

Hyd

role

vel

RW

700

Ser

ies

(Exc

ept

RW

700A

1098

)L1

L2—

BA

2 R

ed W

ires,

Whi

te W

ireG

reen

Wire

Hyd

role

vel

RW

700A

1098

T1T2

—B

A2

Red

Wire

s,W

hite

Wire

Gre

en W

ire

Taco

LTR

, LN,

LT-

1, LT

A-2

& LF

Ser

ies

Low

Wat

er C

utof

f and

Tac

o El

ectri

c W

ater

Fee

der W

iring

Cro

ss R

efer

ence

79

80

Aquastat Wiring

L1 L2 T T

L1(HOT)

L2(NEUTRAL)


OR GAS VALVE

CIRCULATORON BOILER

(IF ATTACHED)

B2 C2 B1ZR

TACOZONE

CONTROL

HONEYWELL L8124A & C OR EQUAL

120 VACINPUT

C1 ZC

END SWITCH

B1 B2 T T

L1(HOT)

L2(NEUTRAL)

CIRCULATORON BOILER

(IF ATTACHED)L1 C2L2

TACOZONE

CONTROL

HONEYWELL L8124B OR EQUAL120 VACINPUT

C

MILLI-VOLTAGEGAS VALVE

END SWITCH

TV T Z

L1(HOT)

L2(NEUTRAL)

CIRCULATORON BOILER

(IF ATTACHED)

L1

C2

L2

TACOZONE

CONTROL

HONEYWELL L8124E OR EQUAL

120 VACINPUT

C1

LOW VOLTAGEGAS VALVE

END SWITCH

B1 B2

Aquastat Wiring

TV T Z

L1(HOT)

CIRCULATORON BOILER

(IF ATTACHED)

B2C2

B1

C1

TACOZONE

CONTROL

HONEYWELL L8124G & L OR EQUAL120 VACINPUT

ZR

END SWITCH

L1

L2(NEUTRAL)

L2

ZC

LINEVOLTAGE

OIL BURNERRELAY OR

GAS VALVE

81

L1 L2 T T

L1(HOT)

L2(NEUTRAL)


OR GAS VALVE

CIRCULATORON BOILER

(IF ATTACHED)

B2

C1

B1ZR

TACOZONE

CONTROL

HONEYWELL L8124M OR EQUAL

120 VACINPUT

C2

ZC

END SWITCH

L1 L2 T T

L1(HOT)

L2(NEUTRAL)


OR GAS VALVE

CIRCULATORON BOILER

(IF ATTACHED)

C1 B2B1

TACOZONE

CONTROL

HONEYWELL L8148A OR EQUAL

120 VACINPUT

C2

END SWITCH

3

82

Aquastat Wiring

TV W T

L1(HOT)

L2(NEUTRAL)

CIRCULATORON BOILER

(IF ATTACHED)

L1

C2

L2

TACOZONE

CONTROL

HONEYWELL L8148E OR EQUAL

120 VACINPUT

C1


END SWITCH

B1 B2

Z

TV W T

L1(HOT)

L2(NEUTRAL)

CIRCULATORON BOILER

(IF ATTACHED)

L1

C2

L2

TACOZONE

CONTROL

HONEYWELL L8148J OR EQUAL

120 VACINPUT

C1


END SWITCH

B1 B3

ZTP

B2

MILLI-VOLTAGE

GASVALVE

OR

L1 L2B2C2

B1

L1(HOT)

L2(NEUTRAL)

OIL BURNERAND

IGNITION

CIRCULATORON BOILER

(IF ATTACHED)

T T FF

TACOZONE

CONTROL

HONEYWELL L8182D OR EQUAL

120 VACINPUT

ZC

ZR

END SWITCH

C1

CAD CELL

Aquastat Wiring

L1 L2 T T

L1(HOT)

L2(NEUTRAL)


OR GAS VALVE

CIRCULATORON BOILER

(IF ATTACHED)

B2 C2 B1ZR

TACOSWITCHING

RELAY

HONEYWELL L8124A & C OR EQUAL

120 VACINPUT

C1 ZC

ZC ZR N HTTHERMOSTAT

(IF INDEPENDENT ZONE)

X XEND SWITCH

83

TV T Z

L1(HOT)

CIRCULATORON BOILER

(IF ATTACHED)

B2C2

B1

C1

HONEYWELL L8124G & L OR EQUAL

120 VACINPUT

ZR

L1

L2(NEUTRAL)

L2

ZC

LINEVOLTAGE

OIL BURNERRELAY OR

GAS VALVE

T THERMOSTAT(IF INDEPENDENT ZONE) TACO

SWITCHINGRELAY

ZC ZR N HX XEND SWITCH

L1 L2 T T

L1(HOT)

L2(NEUTRAL)


OR GAS VALVE

CIRCULATORON BOILER

(IF ATTACHED)

B2 C2 B1ZR

HONEYWELL L8124M OR EQUAL

120 VACINPUT

C1 ZC

TTHERMOSTAT


TACOSWITCHING

RELAY


84

Aquastat Wiring


OR GAS VALVE

CIRCULATORON BOILER

(IF ATTACHED)

C1

B2

B1

HONEYWELL L8148A OR EQUAL

C2

3

L1 L2 T T

L1(HOT)

L2(NEUTRAL)120 VAC

INPUT

TTHERMOSTAT


R

W

BB

RL6006LOWLIMIT

CONTROLERB2

TACOSWITCHING

RELAY


L1 L2B2C2

B1

L1(HOT)

L2(NEUTRAL)

OIL BURNERAND

IGNITION

CIRCULATORON BOILER

(IF ATTACHED)

T T FF

HONEYWELL L8182D OR EQUAL

120 VACINPUT

ZC

ZR

C1

CAD CELLTTHERMOSTAT

(IF INDEPENDENTZONE)

TACOSWITCHING

RELAY


85

Wiring for Boilers with Honeywell Aquastat Model L8124E or Equivalent

TV T Z

L1(HOT)

L2(NEUTRAL)

CIRCULATORON BOILER

(IF ATTACHED)

L1

C2

L2

120 VACINPUT

C1

B1 B2

TACO LTR0243T-1

YELREDWH YELGRN

HONEYWELLL8124E

G

FACTORY WIRING(unplug from B1 terminal)

MALECONNECTOR

FEMALECONNECTOR

NOTE: The green wire must be connected to a ground source electrically common to the boiler ground.

Wiring for Boilers with Honeywell Aquastat Model L8148E or Equivalent

TV W T

L1(HOT)

L2(NEUTRAL)

CIRCULATORON BOILER

(IF ATTACHED)

L1

C2

L2

120 VACINPUT

C1B1 B2

Z

TACO LTR0243T-1

YELREDWH YELGRN

G

FACTORY WIRING(unplug from B1 terminal)

MALECONNECTOR

HONEYWELLL8148E

FEMALECONNECTOR

NOTE: The green wire must be connected to a ground source electrically common to the boiler ground.

Aquastat Wiring to 24VAC Low Water Cutoff

TV W T

L1(HOT)

L2(NEUTRAL)

CIRCULATORON BOILER

(IF ATTACHED)

L1

C2

L2

120 VACINPUT

C1


B1 B2

HONEYWELLL8148E

TACO LNA024 or LTA024-2

N H COM NC NO

SPILLSWITCH

B

R

Z

G

TOTHERMOSTAT

Aquastat Wiring to 120VAC Low Water Cutoff

TV W T

L1(HOT)

L2(NEUTRAL)

CIRCULATORON BOILER

(IF ATTACHED)

L1

C2

L2

120 VACINPUT

C1


B1 B2

HONEYWELLL8148E

TACO LNA120 OR LTA120-2

N H COM NC NO

SPILLSWITCH

B

R

Z

G

TOTHERMOSTAT

86

87

AT

TO: 120 VAC POWERCIRCULATOR

JUMPER

120 VACINPUT

THERMOST

R WT T COM

24VAC

N/O N/C N/C N/ON H 3 4 4 6 6 5

TO: TT ON BOILER

SR5011 ZONE SWITCHING RELAY

POWER

T STAT

TACO SR501 REPLACEMNENT CROSS-REFERENCE

MANUFACTURER MODEL CONNECTIONS

Taco SR501 H N 3 4 NO 4 NC 5 6 NO 6 NC R/T W/T C

Argo AR821 1 2 3 4 5 6 T

AR822 L1 L2 3 4 NO 4 NC 5 6 NO 6 NC R/T G/T C

Colombus MR10 L1 L2 3 4 NO 4 NC 5 6 NO 6 NC R/T G/T C

Erie SR100 L1 L2 3 4 NO 4 NC 5 6 NO 6 NC R/T G/T C

Honeywell RA89A 1 2 3 4 T T

RA832A 1 2 3 4 X X T T

R845A 1 2 3 4 5 6 T T

White-Rogers 889-189 1 2 3 4 T T

829-845 1 2 3 4 5 6 T T

TypicalWiring

AlternativeWiring

AT

TO: 120 VAC POWERCIRCULATOR

120 VACINPUT

THERMOST

R WT T COM

24VAC

N/O N/C N/C N/ON H 3 4 4 6 6 5

TO: ZC

SR5011 ZONE SWITCHING RELAY

POWER

T STAT

TO: ZR

Terminal Description:T & T Thermostat ConnectionCOM Common side of transformer, to power some setback thermostatsN Neutral wire of power inputH Hot wire of power input3 Common terminal for 4 n/o and 4 n/c4 n/o Normally open terminal4 n/c Normally closed terminal6 n/c Normally closed terminal6 n/o Normally open terminal5 Common terminal for 6 n/o and 6 n/c

Specifications:PRODUCT NUMBER TRANSFORMER MAXIMUM DIMENSIONS OF ENCLOSURENUMBER OF ZONES VOLTAGE COMBINED LOAD WIDTH HEIGHT DEPTH

SR501 1 Zone 120 VAC Input 7.2 amps 4 1/4" 5 1/4" 2 3/4"

All Switching Relays are relay type DPDT, have a thermostat current of .18, and have a singlephase motor rating per zone of 1/3 hp (7.2A) @ 120 VAC.

Instruction SheetSR501 Switching Relay

Do it Once. Do it Right.®

TACO, INC., 1160 Cranston Street, Cranston, RI 02920 Telephone: (401) 942-8000 FAX: (401) 942-2360.TACO (Canada), Ltd., 6180 Ordan Drive, Mississauga, Ontario L5T 2B3. Telephone: 905/564-9422. FAX: 905/564-9436.

Visit our web site at: http://www.taco-hvac.com

Printed in USA

Copyright 2005

TACO, Inc.

Features:External Indicator LightsUniversal ReplaceabilitySnap-in PC BoardSimplified WiringFully Enclosed Snap-Out Relays100% Factory TestedContractor Friendly PC Board LayoutUniversal Thermostat CompatibilityUL ApprovedExtended 3 Year WarrantyMade in the USA

Operation:Connect a thermostat to the “T T” terminals onthe switching relay. When the thermostat calls forheat, the relay is energized and power is given to thecirculator.

Power Input:Connect 120 volt ac power to terminals N and H.

Jumper Placement:The jumper is factory installed between terminals Hand 3 to switch power on terminals 4 n/o and 4 n/c.

External Diagnostics:The External lights show full functionality of theswitching relay. The green light should always be on,indicating that power is connected. When the ther-mostat calls for heat, both the appropriate circulatorand red indicating light is energized.

The Taco Connection:Combine the reliability of the Taco Zone Valves,Priority Zoning Circulators, Thermostats, and the “00”family of circulators with the advanced features of theTaco Zone Controls to achieve total system integra-tion. No matter the application, Taco now providesthe products to maximize system performance whilesimplifying both installation and service.

Warning: Wiring connections must be made in accordance with all applicable elec-trical codes and these instructions. Use copper wire only. Failure to follow thisinstruction can result in personal injury or death and/or property damage. 10-18gauge wire recommended for 120 VAC connections with 9 in.lbs. max torque, 12-22gauge wire for thermostat connections with 9 in.lbs. max torque, and 12-22 gaugewire for 24 VAC source with 5 in.lbs. max torque.

Note: When using Alternative Wiring diagram, the boiler operating con-trol’s ZC terminal will see the load of the circulator(s). Warning: When using Alternative Wiring diagram, wiring instructionsmust be followed so power originates from the boiler aquastat. Failure tofollow these wiring instructions may result in a secondary source of powerbeing connected to the boiler that may activate it under certain circum-stances, causing injury or death.

88

TACO SR501-845RP REPLACEMENT CROSS-REFERENCE

MANUFACTURER MODEL CONNECTIONS

Taco SR501-845RP L1 L2 3 4 5 6 R/T W/T

Argo AR821 1 2 3 4 5 6 T

AR822 L1 L2 3 4 NO 5 6 NO R/T G/T

Colombus MR10 L1 L2 3 4 NO 5 6 NO R/T G/T

Erie SR100 L1 L2 3 4 NO 5 6 NO R/T G/T

Honeywell RA89A 1 2 3 4 T T

RA832A 1 2 3 4 X X T T

R845A 1 2 3 4 5 6 T T

White-Rogers 889-189 1 2 3 4 T T

829-845 1 2 3 4 5 6 T T

Features:Universal ReplaceabilityIndicator LightsSnap-in PC Board to Existing EnclosureSimplified WiringFully Enclosed Snap-Out Relay100% Factory TestedUniversal Thermostat CompatibilityUL ApprovedExtended 3 Year WarrantyMade in the USA

Operation:Connect a thermostat to the “T T” terminals onthe switching relay. When the thermostat calls forheat, the relay is energized and power is given tothe circulator.

Power Input:Connect 120 volt ac power to terminals L1 and L2.

Jumper Placement:The jumper is factory installed between terminalsL1 and 3 to switch power on terminal 4.

Diagnostics:The Indicator lights show full functionality of theswitching relay. The green light should always beon, indicating that power is connected. When thethermostat calls for heat, both the appropriate cir-culator and red indicating light is energized.

The Taco Connection:Combine the reliability of the Taco Zone Valves,Priority Zoning Circulators, Thermostats, and the“00” family of circulators with the advanced featuresof the Taco Zone Controls to achieve total systemintegration. No matter the application, Taco now pro-vides the products to maximize system performancewhile simplifying both installation and service.

TypicalWiring

AlternativeWiring

TO: ZR

TO: ZC

THERMOSTAT

TO: 120 VAC POWER

INPUT

R WT T

L2 L1 3 4 5 6

120 VAC

POWER

T STATUNIVERSAL REPLACEMENT RELAY MODEL: SR501-845RP

REPL

AC

ES H

ON

EYW

ELL

R845

, RA

89A

& R

A83

2O

R C

OM

PARA

BLE

RELA

Y

CIRCULATOR

THERMOSTAT

TO: 120 VAC POWER

CIRCULATOR

TO: TT ON BOILER

JUMPER

R WT T

L2 L1 3 4 5 6

120 VACINPUT

POWER

T STATUNIVERSAL REPLACEMENT RELAY MODEL: SR501-845RP

REPL

AC

ES H

ON

EYW

ELL

R845

, RA

89A

& R

A83

2O

R C

OM

PARA

BLE

RELA

Y

Terminal Description:T & T Thermostat ConnectionL2 Neutral wire of power inputL1 Hot wire of power input3 Common terminal for 44 Normally open terminal6 Normally open terminal5 Common terminal for 6


SR501-845RP 1 Zone 120 VAC Input 7.2 amps 4 1/4" 5 1/4" 2 3/4"

All Switching Relays are relay type DPDT, have a thermostat current of .18, and have a single phase motor rating per zone of 1/3 hp (7.2A) @ 120 VAC.

Instruction SheetSR501-845RP Universal Replacement Relay

Warning: Wiring connections must be made in accordance with all applicable elec-trical codes and these instructions. Use copper wire only. Failure to follow thisinstruction can result in personal injury or death and/or property damage. 10-18gauge wire recommended for 120 VAC connections with 9 in.lbs. max torque, 12-22gauge wire for thermostat connections with 9 in.lbs. max torque, and 12-22 gaugewire for 24 VAC source with 5 in.lbs. max torque.




Printed in USA

Copyright 2005

TACO, Inc.

Note: When using Alternative Wiring diagram, the boiler operating control’sZC terminal will see the load of the circulator(s). Warning: When using Alternative Wiring diagram, wiring instructions mustbe followed so power originates from the boiler aquastat. Failure to followthese wiring instructions may result in a secondary source of power beingconnected to the boiler that may activate it under certain circumstances,causing injury or death.

89




Printed in USA

Copyright 2005

TACO, Inc.

SR 503

24 VACPOWER

FUSE 1 AMP

THERMOSTATS

ZONE1 ZONE2 ZONE3

120 VOLTCIRCULATORS

ZONE1 ZONE2 ZONE3





JUMPERSN P ZC H X ZR1

X2

ZONE 2

POWERZONE 1

ZONE 3


SR 503

24 VACPOWER

FUSE 1 AMP

THERMOSTATS

ZONE1 ZONE2 ZONE3

120 VOLTCIRCULATORS



TO: "ZC" ON AQUASTAT CONTROL

TO: "ZR" ON AQUASTAT CONTROL


N P ZC H X ZR1

X2

ZONE 2

POWERZONE 1

ZONE 3


Cold Start Boiler Application

Tankless Coil Boiler Application


SR502 2 with Priority 120 VAC Input 15 amps 10 1/4" 6 3/4" 2 3/4"SR503 3 with Priority 120 VAC Input 15 amps 10 1/4" 6 3/4" 2 3/4"

All Switching Relays are relay type DPST, have a thermostat current of .18, and have a single phase motor rating per zone of 1/3 hp (7.2A) @ 120 VAC.

Features: External Indicator LightsPrioritySimplified WiringFully Enclosed Snap-Out RelaysCompact DesignFuse Protected100% Factory TestedIsolated End SwitchContractor Friendly PC Board LayoutUniversal Thermostat CompatibilityUL Approved24 volt Power Input or Output TerminalExtended 3 Year WarrantyMade in the USA

The Taco Connection:Combine the reliability of the Taco Zone Valves, Priority ZoningCirculators, Thermostats, and the “00” family of circulators with theadvanced features of the Taco Zone Controls to achieve total systemintegration. No matter the application, Taco now provides the productsto maximize system performance while simplifying both installationand service.

External Diagnostics:Externally visible lights show full functionality of the switching relay.The green light should always be on, indicating that power is connect-ed. When the thermostat calls for heat, both the appropriate circulatorand red indicating light is energized.

Warning: Wiring connections must be made in accordance with all applicable electrical codes and theseinstructions. Use copper wire only. Failure to follow this instruction can result in personal injury ordeath and/or property damage. 10-18 gauge wire recommended for 120 VAC connections with 9 in.lbs.max torque, 12-22 gauge wire for thermostat connections with 9 in.lbs. max torque, and 12-22 gaugewire for 24 VAC source with 5 in.lbs. max torque.

Instruction SheetSR502 & SR503 Switching Relay

Operation: When the thermostat calls for heat, the appropriate circu-lator is energized and the isolated end switch (X1 and X2) will start theboiler.Jumper Placement: The jumper should be placed between terminalsZC and H. Connect the isolated end switch, X1 and X2 to the boileraquastat control. For zone 1 priority, remove jumper betweenterminals P and ZC.

Power Input: Connect 120 volt ac power input to terminals N and H.Neutral wire to terminal N. Hot wire to terminal H.

Operation: When any thermostat calls for heat, the boiler and appro-priate circulator are energized when the boiler temperature is above theset low limit.Jumper Placement: A jumper should be placed between terminals ZCand X1. Connect terminal ZC to ZC terminal on the aquastat control.Connect terminal ZR to ZR terminal on the aquastat control. Confirmpolarity is consistent between boiler aquastat and switching relay. Forzone 1 priority, remove jumper between terminalsP and ZC.Power Input: Connect 120 volt ac power input to terminals N and H.Neutral wire to terminal N. Hot wire to terminal H.

Note: When using Alternative Wiring diagram, the boiler operating control’s ZC terminal will see the load of the circulator(s). Warning: When using Alternative Wiring diagram, wiring instructions must be followed so power originates from the boiler aquastat. Failure tofollow these wiring instructions may result in a secondary source of power being connected to the boiler that may activate it under certain cir-cumstances, causing injury or death.

90


ZONE 6

ON

OFF

PRIORITY

120V RELAY


X XEND

SWITCH

POWERINPUT

120 VAC INPUT

TO: "TT" ON BOILER

ZONE1 ZONE2

ZONE3

ZONE4 ZONE5 ZONE6


THERMOSTATS

FUSE 1 AMP

24 VACPOWER

SR 506

ZONE 2

POWERZONE 1

ZONE 3ZONE 4

ZONE 5ZONE 6

JUMPER


ZONE 6

ON

OFF

PRIORITY

120V RELAY

FUSE 1 AMP

24 VACPOWER


X XEND

SWITCH

POWERINPUT

120 VAC INPUT


ZONE1 ZONE2

ZONE3

ZONE4 ZONE5 ZONE6

THERMOSTATS

SR 506

ZONE 2

POWERZONE 1

ZONE 3

ZONE 4

ZONE 5ZONE 6

TO: "ZC" ON AQUASTAT

TO: "ZR" ON AQUASTAT

JUMPER

The Taco Connection:Combine the reliability of the Taco Zone Valves, Priority ZoningCirculators, Thermostats, and the “00” family of circulators with theadvanced features of the Taco Zone Controls to achieve total systemintegration. No matter the application, Taco now provides the productsto maximize system performance while simplifying both installationand service.

External Diagnostics:Externally visible lights show full functionality of the switching relay.The green light should always be on, indicating that power is connected.When the thermostat calls for heat, both the appropriate circulator andred indicating light is energized.

Warning: Wiring connections must be made in accordance with all applicable electrical codesand these instructions. Use copper wire only. Failure to follow this instruction can result in per-sonal injury or death and/or property damage. 10-18 gauge wire recommended for 120 VAC con-nections with 9 in.lbs. max torque, 12-22 gauge wire for thermostat connections with 9 in.lbs.max torque, and 12-22 gauge wire for 24 VAC source with 5 in.lbs. max torque.

Cold Start BoilerApplication

Tankless Coil BoilerApplication


SR504 4 with Priority 120 VAC Input 20 amps 10 1/4" 6 3/4" 2 3/4"SR506 6 with Priority 120 VAC Input 20 amps 11 3/4" 7 1/2" 3"


Instruction SheetSR504 & SR506 Switching Relay

Features: External Indicator LightsSwitchable PrioritySimplified WiringFully Enclosed Snap-Out RelaysCompact DesignFuse Protected100% Factory TestedIsolated End SwitchContractor Friendly PC Board LayoutUniversal Thermostat CompatibilityUL Approved24 volt Power Input or Output TerminalExtended 3 Year WarrantyMade in the USA




Printed in USA

Copyright 2005

TACO, Inc.

Operation: When any thermostat calls for heat, the appropriate circu-lator is energized and the isolated end switch (X and X) will start theboiler.Priority Operation: When zone 6 is switched to the priority settingand is actuated, all other zones will stop operation until zone 6 is sat-isfied. When zone 6 is not switched to priority, all zones will operateindependently.Jumper Placement: The jumper should be placed between terminalsZC and ZR. Connect the isolated end switch to the aquastat control onthe boiler.

Power Input: Connect 120 volt ac power input to terminals N and H.Neutral wire to terminal N. Hot wire to terminal H.

Operation: When any thermostat calls for heat, the boiler and appro-priate circulator are energized when the boiler temperature is above theset low limit.Priority Operation: When zone 6 is switched to the priority settingand is actuated, all other zones will stop operation until zone 6 is sat-isfied. When zone 6 is not switched to priority, all zones will operateindependently.Jumper Placement: MOVE the jumper between terminals ZC and ZRto end switch X and ZC. Connect terminal ZC to ZC terminal on theaquastat control. Connect the other end switch X to ZR terminal on theaquastat control. Confirm polarity is consistent between boiler aquas-tat and switching relay. Power Input: Connect 120 volt ac power input to terminals N and H.Neutral wire to terminal N. Hot wire to terminal H.

Warning: When using Alternative Wiring diagram, wiring instructions must be followed so power originates from the boiler aquastat. Failure tofollow these wiring instructions may result in a secondary source of power being connected to the boiler that may activate it under certain cir-cumstances, causing injury or death.

91

TO: 120 VAC POWER

CIRCULATOR

POWER

T STAT

TO: "TT" on Boiler Aquastat

THERMOSTAT

TO: 120 VAC POWER

POWER

T STAT

TO: ZC on Boiler Control

TO: DHW Aquastat if PC700Boiler Reset is installed.

CIRCULATOR

THERMOSTAT

TO: ZR on Boiler Control


120VACINPUT

120VACOUTPUT

CIRCOUTPUT

PRIORITYOUTPUT

ENDSWITCH


ENDSWITCH


X COMT/WT/RX 1 12 243 X COMT/WT/RX 1 12 243

JUMPER

SR 501-EXP

RESET

POWERCONTROLS

FUSE1 AMP NORMAL

MODE

SR 501-EXP

RESET

POWERCONTROLS

FUSE1 AMP NORMALMASTER

SLAVE

MODE

FUSE5 AMP

TO: DHW Aquastat if PC700Boiler Reset is installed.

TT

K1-A

K1-B K2-A K2-A

K1 K2


120VACINPUT

120VACOUTPUT

CIRCOUTPUT

PRIORITYOUTPUT

MASTER

SLAVE

FUSE5 AMP

K1-A

K1-B K2-A K2-A

K1 K2

Operation: When the thermostat calls for heat, the appropriate circulator is ener-gized and the isolated end switch (X and X) will start the boiler. Priority Outputhas power all the time, except when the thermostat is calling.

Mode Operation: When the mode switch is set to NORMAL, the end switchrelay will be energized if any zone is in operation. When the switch is set toRESET, the end switch relay will only be energized through the operation of aplug-in reset control or closure of Priority Input.Jumper Placement: The jumper should be placed between terminals ZC and H.Connect the isolated end switch to the aquastat control on the boiler.

Power Input: Connect 120 volt ac power input to terminals N and H. Neutralwire to terminal N. Hot wire to terminal H.Expansion Connections: Set the expansion switch to MASTER on the switchingrelay that has the designated priority zone or is utilizing the PowerPort options.Set all other daisy chained controls to SLAVE. Connect thermostat wire (18-22gauge) between terminals 1, 2, 3, 4 on the master control to the corresponding1, 2, 3, 4 on the SLAVE control(s). Controls may be daisy chained up to 20 zonesusing any combination of -EXP controls.

Operation: When the thermostat calls for heat, the appropriate circulator is ener-gized when the boiler’s aquastat is above the set low limit. The ZR (120VAC) out-put will signal the boiler to start. Priority Output has power all the time, exceptwhen the thermostat is calling.Mode Operation: When the mode switch is set to NORMAL, the end switchrelay will be energized if any zone is in operation. When the switch is set toRESET, the end switch relay will only be energized through the operation of aplug-in reset control or closure of Priority Input.Jumper Placement: REMOVE the jumper between terminals ZC and H. Connectterminal ZC to ZC terminal on the aquastat control. Connect terminal ZR to ZRterminal on the aquastat control. Confirm polarity is consistent between boileraquastat and switching relay.Power Input: Connect 120 volt ac power input to terminals N and H. Neutralwire to terminal N. Hot wire to terminal H.Expansion Connections: Set the expansion switch to MASTER on the switchingrelay that has the designated priority zone or is utilizing the PowerPort options.Set all other daisy chained controls to SLAVE. Connect thermostat wire (18-22gauge) between terminals 1, 2, 3, 4 on the master control to the corresponding1, 2, 3, 4 on the SLAVE control(s). Controls may be daisy chained up to 20 zonesusing any combination of -EXP controls.

External Diagnostics: Externally visible lights show full functionality of theswitching relay. The green light should always be on, indicating that power isconnected. When the thermostat calls for heat, both the appropriate circulatorand red indicating light are energized.

Warning: Wiring connections must be made in accordance with all applicable electrical codes. Use copper wire only with a minimum temperature rating of 60/75°C. Failure to follow this instruction canresult in personal injury or death and/or property damage. 12-18 gauge wire recommended for 120 VAC connections, 14-22 gauge wire for thermostat connections, and 14-22 gauge wire for 24 VAC sourceconnections.



Specifications:PRODUCT NUMBER POWER TRANSFORMER MAXIMUM DIMENSIONS OF ENCLOSURENUMBER OF ZONES CONTROLS VOLTAGE COMBINED LOAD WIDTH HEIGHT DEPTH

SR501-EXP 1 1 120 VAC Input 5.0 amps 4 1/4" 5 1/4" 2 3/4"

All Switching Relays are relay type DPDT, have a thermostat current of .18, and have asingle phase motor rating per zone of 1/3 hp (5.0A) @ 120 VAC.

Instruction SheetSR501-EXP Switching Relay

Features: External Indicator LightsIdeal for RetrofittingPriority OutputSimplified WiringAdd-On Power ControlsSealed RelaysCompact DesignFuse Protected100% Factory TestedIsolated End Switch

Expandable to 20 ZonesContractor Friendly PC Board

LayoutUniversal Thermostat

CompatibilityUL Approved24 volt Power Input or Output

TerminalExtended 3 Year WarrantyMade in the USA




Printed in USA

Copyright 2005

TACO, Inc.


92


ZONE 6

ONOFF

PRIORITY

120V RELAY

PLUG-IN CARDS

FUSE 1 AMP

24 VACPOWER

EXPANSIONCONNECTIONS

SLAVE

MASTER

1234

RESET NORMAL



X XEND

SWITCH

POWERINPUT

120 VAC INPUTTO: "TT" ON BOILER

ZONE1 ZONE2

ZONE3

ZONE4 ZONE5 ZONE6


THERMOSTATS

SR 506-EXP

ZONE 2

POWERZONE 1


JUMPER


ZONE 6

ONOFF

PRIORITY

120V RELAY

PLUG-IN CARDS

FUSE 1 AMP

24 VACPOWER

EXPANSIONCONNECTIONS

SLAVE

MASTER

1234

RESET NORMAL



X XEND

SWITCH

POWER

INPUT

120 VAC INPUT

ZONE1 ZONE2

ZONE3

ZONE4 ZONE5 ZONE6


THERMOSTATS

SR 506-EXP

ZONE 2

POWERZONE 1


TO: "ZC" ON AQUASTAT

TO: "ZR" ON AQUASTATJUMPER

External Diagnostics: Externally visible lights show full functionality of theswitching relay. The green light should always be on, indicating that power isconnected. When the thermostat calls for heat, both the appropriate circulatorand red indicating light is energized.

Warning: Wiring connections must be made in accordance with all applicable electrical codes and these instructions. Use copper wire only. Failure to follow this instruction can result in personal injury ordeath and/or property damage. 10-18 gauge wire recommended for 120 VAC connections with 9 in.lbs. max torque, 12-22 gauge wire for thermostat connections with 9 in.lbs. max torque, and 12-22 gauge wirefor 24 VAC source with 5 in.lbs. max torque.



Specifications:PRODUCT NUMBER POWER TRANSFORMER MAXIMUM DIMENSIONS OF ENCLOSURENUMBER OF ZONES PORTS VOLTAGE COMBINED LOAD WIDTH HEIGHT DEPTH

SR503-EXP 3 with Priority 3 120 VAC Input 20 amps 10 1/4" 6 3/4" 2 3/4"SR504-EXP 4 with Priority 3 120 VAC Input 20 amps 10 1/4" 6 3/4" 2 3/4"SR506-EXP 6 with Priority 3 120 VAC Input 20 amps 11 3/4" 7 1/2" 3"


Instruction SheetSR503-EXP, SR504-EXP & SR506-EXP Switching Relay

Features: External Indicator Lights

Plug-In PowerPort CardsSwitchable PrioritySimplified WiringAdd-On Power ControlsFully Enclosed Snap-Out

RelaysCompact DesignFuse Protected100% Factory Tested

Isolated End SwitchExpandable to 20 ZonesContractor Friendly PC Board

LayoutUniversal ThermostatCompatibilityUL Approved24 volt Power Input or Output

TerminalExtended 3 Year WarrantyMade in the USA




Printed in USA

Copyright 2005

TACO, Inc.

Operation: When any thermostat calls for heat, the appropriate circulator isenergized and the isolated end switch (X and X) will start the boiler.

Priority Operation: When zone 6 is switched to the priority setting and is actu-ated, all other zones will stop operation until zone 6 is satisfied. When zone 6 isnot switched to priority, all zones will operate independently.

Mode Operation: When the mode switch is set to NORMAL, the end switchrelay will be energized if any zone is in operation. When the switch is set toRESET, the end switch relay will only be energized if priority zone is in operation,or through the operation of a plug-in reset control.

Jumper Placement: The jumper should be placed between terminals ZC and ZR.Connect the isolated end switch to the aquastat control on the boiler.

Power Input: Connect 120 volt ac power input to terminals N and H. Neutralwire to terminal N. Hot wire to terminal H.

Expansion Connections: Set the expansion switch to MASTER on the switchingrelay that has the designated priority zone or is utilizing the PowerPort options.Set all other daisy chained controls to SLAVE. Connect thermostat wire (18-22gauge) between terminals 1, 2, 3, 4 on the master control to the corresponding1, 2, 3, 4 on the SLAVE control(s). Controls may be daisy chained up to 20 zonesusing any combination of -EXP controls.

Operation: When any thermostat calls for heat, the boiler and appropriate cir-culator are energized when the boiler temperature is above the set low limit.

Priority Operation: When zone 6 is switched to the priority setting and is actu-ated, all other zones will stop operation until zone 6 is satisfied. When zone 6 isnot switched to priority, all zones will operate independently.

Mode Operation: When the mode switch is set to NORMAL, the end switchrelay will be energized if any zone is in operation. When the switch is set toRESET, the end switch relay will only be energized if priority zone is in operation,or through the operation of a plug-in reset control.

Jumper Placement: MOVE the jumper between terminals ZC and ZR to endswitch X and ZC. Connect terminal ZC to ZC terminal on the aquastat control.Connect the other end switch X to ZR terminal on the aquastat control. Confirmpolarity is consistent between boiler aquastat and switching relay.

Power Input: Connect 120 volt ac power input to terminals N and H. Neutralwire to terminal N. Hot wire to terminal H.

Expansion Connections: Set the expansion switch to MASTER on the switchingrelay that has the designated priority zone or is utilizing the PowerPort options.Set all other daisy chained controls to SLAVE. Connect thermostat wire (18-22gauge) between terminals 1, 2, 3, 4 on the master control to the corresponding1, 2, 3, 4 on the SLAVE control(s). Controls may be daisy chained up to 20 zonesusing any combination of -EXP controls.


93

24 VAC

ZONE 1 ZONE 2 ZONE 3 ZONE 4 ZONE 5

FUSE (5 A

MP M

AX

)

T T T T T T T T T T

ZVC 405



JUMPER3 & 4


123

MOTOR ENDSWITCH



T STAT 1

VALVE 1

T STAT 2



FIVE ZONE ZONE VALVE CONTROL

24 VAC

FA

CTO

RYIN

STA

LLED

TRA

NSF

ORM

ER 120 VAC

INPUT

WHITE

BLACK

ENDSWITCH

N/O COM N/C

TT

TO CIRCULATOROR BOILERAQUASTAT RELAY

DRYCONTACTS

POW

ER IN

24 VAC

FA

CTO

RYIN

STA

LLED

TRA

NSF

ORM

ER

120 VACINPUT

WHITE

BLACK

Operation/External Diagnostics: When any thermostatcalls for heat, the appropriate zone valve is energized andthe yellow light goes on. When the zone valve is fullyopen, the red light goes on and energizes the end switchrelay. The green light should always be on, indicating thatpower is connected.

The Taco Connection: Combine the reliability of the TacoZone Valves, Priority Zoning Circulators, Thermostats, andthe “00” family of circulators with the advanced features ofthe Taco Zone Controls to achieve total system integra-tion. No matter the application, Taco now provides theproducts to maximize system performance while simplify-ing both installation and service.

Warning: Wiring connections must be made in accordance with all applicableelectrical codes. Use copper wire only. Failure to follow this instruction can resultin personal injury or death and/or property damage. 10-18 gauge wire recom-mended for 120 VAC connections with 9 in.lbs. max torque, 12-22 gauge wire forthermostat connections with 9 in.lbs. max torque, and 12-22 gauge wire for 24VAC source with 5 in.lbs. max torque.

WiringDiagram

Specifications:PRODUCT NUMBER TRANSFORMER MAX OUTPUT DIMENSIONS OF ENCLOSURENUMBER OF ZONES VOLTAGE AT 24 VAC WIDTH HEIGHT DEPTH

ZVC403 3 Zone 120 VAC Input 40 VA 10 1⁄4" 6 3⁄4" 2 3⁄4"ZVC405 5 Zone 120 VAC Input 80 VA 113⁄4" 71⁄2" 3"

All Zone Valve Controls are relay type DPDT and have a single phase motor rating per zone of 1⁄6 hp (5A) @ 120 VAC.

Instruction SheetZVC403 & ZVC405 Zone Valve Control

Features: External Indicator Lights

Simplified WiringWorks with 2, 3, or 4-

Wire Zone ValvesCompact DesignFuse Protected100% Factory TestedIsolated End Switch

Extra Set of Dry ContactsContractor Friendly PC

Board LayoutUniversal Thermostat

CompatibilityUL ApprovedSturdy Screw ConnectionsExtended 3 Year WarrantyMade in the USA

Do it Once. Do it Right.TACO, INC., 1160 Cranston Street, Cranston, RI 02920 Telephone: (401) 942-8000 FAX: (401) 942-2360.TACO (Canada), Ltd., 6180 Ordan Drive, Mississauga, Ontario L5T 2B3. Telephone: 905/564-9422. FAX: 905/564-9436.


Printed in USA

Copyright 2000

TACO, Inc.

ENDSWITCH

N/O COM N/C

TT BOILER

HOT

NEUTRAL

120 VAC

Installation ofOptional SystemCirculator

94

24 VAC


MODENORMAL RESET

FUSE (7 A

MP M

AX

)


ZONE 6 PRIORITY

OFF

ON

ZVC 406


INDIRECTWATER HEATERAQUASTATOR THERMOSTAT


JUMPER3 & 4


123

MOTOR ENDSWITCH



T STAT 1

VALVE 1

T STAT 2


VALVE 4T STAT 5VALVE 5T STAT 6VALVE 6POWER

SIX ZONE ZONE VALVE CONTROLWITH OPTIONAL PRIORITY

24 VAC

FA

CTO

RYIN

STA

LLED

TRA

NSF

ORM

ER

120 VACINPUT

WHITE

BLACK

POW

ER IN

24 VAC

FA

CTO

RYIN

STA

LLED

TRA

NSF

ORM

ER

120 VACINPUT

WHITE

BLACK

N/O COMZONE 6 RELAY

TT

TO CIRCULATOROR BOILERAQUASTAT RELAY

DRYCONTACTS

ENDSWITCH

EXTRAEND

SWITCH

MAIN N/C

1 2 3 4ZONE 6

PRIORITYZONE


Operation/External Diagnostics: When any thermostatcalls for heat, the appropriate zone valve is energized and theyellow light goes on. When the zone valve is fully open, thered light goes on and energizes the end switch relay. The greenlight should always be on, indicating that power is connected.

Priority Operation: When zone 6 is switched to the prioritysetting and is actuated, all other zones will stop operation untilzone 6 is satisfied. When zone 6 is not switched to priority, allzones will operate independently. Note: When a circulator isused on the priority zone instead of a zone valve, jumper 3 and4 of the priority zone.

Mode Operation: When the mode switch is set to NORMAL,the end switch relay will be energized if any zone is in opera-tion. When the switch is set to RESET, the end switch relaywill only be energized if priority zone is in operation.

The Taco Connection: Combine the reliability of the TacoZone Valves, Priority Zoning Circulators, Thermostats, and the“00” family of circulators with the advanced features of theTaco Zone Controls to achieve total system integration. Nomatter the application, Taco now provides the products tomaximize system performance while simplifying both instal-lation and service.

WiringDiagram


ZVC404 4 with Priority 120 VAC Input 40 VA 101⁄4" 63⁄4" 23⁄4"ZVC406 6 with Priority 120 VAC Input 80 VA 113⁄4" 71⁄2" 3"

All Zone Valve Controls are relay type DPDT and have a single phase motor rating per zone of 1⁄6 hp (5A) @ 120 VAC.

Instruction SheetZVC404 & ZVC406 Zone Valve Control

Features: External Indicator LightsSwitchable PrioritySimplified WiringWorks with 2, 3, or 4-Wire Zone ValvesCompact DesignFuse Protected100% Factory TestedIsolated End SwitchExtra Set of Dry ContactsContractor Friendly PC Board LayoutUniversal Thermostat CompatibilityUL ApprovedSturdy Screw ConnectionsExtended 3 Year WarrantyMade in the USA

Warning: Wiring connections must be made in accordance with all applicable electrical codes. Use copperwire only. Failure to follow this instruction can result in personal injury or death and/or property damage.10-18 gauge wire recommended for 120 VAC connections with 9 in.lbs. max torque, 12-22 gauge wire forthermostat connections with 9 in.lbs. max torque, and 12-22 gauge wire for 24 VAC source with 5 in.lbs.max torque.



Printed in USA

Copyright 2000

TACO, Inc.

Installation ofOptional Systemand/or DHW Circulator

N/O COM N/C

TT BOILER

HOT

NEUTRAL120 VAC

ENDSWITCH

EXTRAEND

SWITCH

MAIN

(See Note)

SYSTEM CIRCULATOR

DHW CIRCULATOR

95


FUSE

7 A

MP

MA

X


ZONE 6

OFF

ON

1 2 3 4ZONE 1

1 2 3 4ZONE 2

1 2 3 4ZONE 3

1 2 3 4ZONE 4

1 2 3 4ZONE 5

1 2 3 4ZONE 6

MODENORMALRESET

INDIRECTWATER HEATERAQUASTATOR THERMOSTAT

PRIORITYZONE



123

JUMPER3 & 4

MOTOR ENDSWITCH



JUMPER3 & 4

1 2 3 4

MASTER

SLAVE

POWERCONTROLS


TAC

O, I

NC

ZVC

406-

EXP

T STAT 1

T STAT 2

T STAT 3

T STAT 4

T STAT 5

T STAT 6

POWER ON

VALVE 1

VALVE 2

VALVE 3

VALVE 4

VALVE 5

VALVE 6

�SEE NOTE

EXPANSION

ZVC 406-EXPSIX ZONE ZONE VALVE CONTOL


24 VAC 24 VAC

FA

CTO

RYIN

STA

LLED

TRA

NSF

ORM

ER

120 VACINPUT

WHITE

BLACK

POW

ER IN

24 VAC

FA

CTO

RYIN

STA

LLED

TRA

NSF

ORM

ER

120 VACINPUT

WHITE

BLACK

TO CIRCULATOROR BOILER

AQUASTAT RELAY

DRYCONTACTS

N/O COMZONE 6 RELAY

N/CEND

SWITCHA

BOILER

ENDSWITCH

BPUMP

TO CIRCULATOROR BOILER

AQUASTAT RELAY

Operation/External Diagnostics: When any thermostat calls forheat, the appropriate zone valve is energized and the yellow light goeson. When the zone valve is fully open, the red light goes on and ener-gizes the end switch relays. The green light should always be on, indi-cating that power is connected.Priority Operation: When zone 6 is switched to the priority settingand is actuated, all other zones will stop operation until zone 6 is sat-isfied. When zone 6 is not switched to priority, all zones will operateindependently. Note: When a circulator is used on the priority zoneinstead of a zone valve, jumper 3 and 4 of the priority zone.Mode Operation: When the mode switch is set to NORMAL, both endswitch relays will be energized if any zone is in operation. When themode switch is set to RESET, the end switch relay “A” will only be ener-gized when the priority zone is in operation. The end switch relay “B”will be energized when any zone is in operationPower Input: Connect 120 volt ac power input to leads on trans-former. Neutral to white wire. Hot to black wire.Expansion Connections: Set the expansion switch to MASTER on thezone valve control that has the designated priority zone or is utilizingthe PowerPort options. Set all other daisy chained controls to SLAVE.Connect thermostat wire (18-22 gauge) between terminals 1, 2, 3, 4 onthe master control to the corresponding 1, 2, 3, 4 on the SLAVE control(s).Controls may be daisy chained up to 20 zones using any combinationof Switching Relay -EXP or Zone Valve -EXP controls.

The Taco Connection: Combine the reliability of the Taco Zone Valves,Priority Zoning Circulators, Thermostats, and the “00” family of circula-tors with the advanced features of the Taco Zone Controls to achievetotal system integration. No matter the application, Taco now providesthe products to maximize system performance while simplifying bothinstallation and service.

WiringDiagram


ZVC404-EXP 4 with Priority 120 VAC Input 80 VA 113⁄4" 71⁄2" 3"ZVC406-EXP 6 with Priority 120 VAC Input 80 VA 113⁄4" 71⁄2" 3"

All Zone Valve Controls are relay type DPDT and have a single phase motor rating per zoneof 1⁄6 hp (5A) @ 120 VAC.

Instruction SheetZVC404-EXP & ZVC406-EXP Zone Valve Control

Features:External Indicator LightsPlug-In PowerPort CardsSwitchable PrioritySimplified WiringAdd-On Power ControlsWorks with 2, 3, or 4-Wire

Zone ValvesUL ApprovedFuse Protected100% Factory Tested

Isolated End SwitchExpandable to 20 ZonesExtra Set of Dry ContactsContractor Friendly PC

Board LayoutUniversal Thermostat

CompatibilitySturdy Screw ConnectionsExtended 3 Year WarrantyMade in the USA

Warning: Wiring connections must be made in accordance with all applicable electrical codes. Use copper wire only. Failure to follow this instruction can result in personal injury or death and/or propertydamage. 10-18 gauge wire recommended for 120 VAC connections with 9 in.lbs. max torque, 12-22 gauge wire for thermostat connections with 9 in.lbs. max torque, and 12-22 gauge wire for 24 VAC source with5 in.lbs. max torque.



Printed in USA

Copyright 2000

TACO, Inc.

N/O COM N/C

T TBOILER

HOTNEUTRAL

120 VAC

(See Note)

SYSTEMCIRCULATOR

DHWCIRCULATOR

ENDSWITCH

ABOILER

ENDSWITCH

BPUMP

Installation ofOptional Systemand/or DHW Circulator

96

Operation HAFC101 and 201:The Hydro Air Fan Control is an interfacebetween the thermostat and air handler. Italso has an isolated end switch to start theboiler and/or pump. When the thermostatcalls for heat, the Fan Control energizes theend switch relay and allows the fan to operateat low speed when the water is above theoptional aquastat setting. When the thermo-stat calls for cooling, the Fan Control energizesthe condenser and operates on high speed.

Additional HAFC201 Operations:Selectable one, three or four minute delay onfan operation in heating mode. Selectablepump exercise activates circulator but doesnot enable boiler contacts. Two minutes every24 hours minimizes the chance of bacteriabuild-up in an open loop system. Thirty sec-onds every two weeks minimizes seasonalstart-up problems generally associated withharsh water conditions. Optional aquastat orthermostat can be connected to FreezeProtection TT terminals to reduce the chanceof pipes freezing by energizing the pump drycontacts (boiler contacts not activated.)

Switch Settings (HAFC201):1 1 minute on fan delay, in heating mode2 3 minute on fan delay, in heating mode

1&2 4 minute on fan delay, in heating mode3 Pump dry contact activated for 2 min-

utes every 24 hours (boiler contacts notactivated)

4 Pump dry contacts activated for 30 sec-onds every two weeks (boiler contacts not activated)

External Diagnostics:The external lights show full functionality ofthe Hydro Air Fan Control. The green lightshould always be on, indicating that power isconnected. Red lights indicate fan operationfor heating and cooling modes.

Warning:Wiring connections must be made in accordance withall applicable electrical codes. Use copper wire only.Failure to follow this instruction can result in personalinjury or death and/or property damage. 10-18 gaugewire recommended for 120 VAC connections with9 in.lbs. max torque, 12-22 gauge wire for thermostatconnections with 9 in.lbs. max torque, and 12-22 gaugewire for 24 VAC source with 5 in.lbs. max torque.

M

FanRelay

Line

24 V

AC

1 Speed Air Handler*

THERMOSTAT



Dry ContactsTo: “T T” onBoiler orSwitchingRelay



T T

BOILER AIR HANDLER

G GX X C R Y





Hot

Neutral

Circulator

XXPUMP


1 MIN

ON

DELA

Y - FAN

3 MIN

ON

DELA

Y - FAN

2 MIN

@ 24 H

R - PUM

P30 SEC

@ 2 W

K - PUM

P

OFF O

N

Jumper


2 Speed Air Handler*

THERMOSTAT



Dry ContactsTo: “T T” on Boileror Switching Relay



T T

BOILER AIR HANDLER

G GX X C R Y



M

Low

Hig

h

Line

24 V

AC

Fan

Rela

ys

Terminal Description:Thermostat:C Optional: Common side of transformer W White - Heating signal

to power some styles of thermostats Y Yellow - Condenser signalR Red - Hot side of transformer used to G Green - Fan signal

switch all functionsWater Coil Aquastat:TT Connect to aquastat at air handler to control operation of the fan when

in the heating mode. Install a jumper if the aquastat is not usedFreeze Protection Aquastat:TT Connect to aquastat or thermostat to sense low ambient temperature.

Reduces the chance of pipes freezing by energizing the pump dry contacts.Pump Dry Contacts:XX May switch pump directly by bringing in external line voltage or connect

to “T T” on a switching relay.Boiler Dry Contacts:XX Connect to the boiler or “T T” terminals on a switching relay.Air Handler:C Common side of transformer to power the Fan ControlR Red - Hot side of transformer used to switch all functionsY Yellow - Condenser signal

One Speed Motor:Glow Connect the fan to the relay. Keep the jumper installed between Ghigh and Glow.

Two Speed Motor:Ghigh Remove jumper and connect Ghigh to the high speed fan relay and

connect Glow to the low speed fan relay.

Specifications: ** Model number changed from SR501-FPRODUCT NUMBER POWER INPUT MAXIMUM RELAY THERMOSTAT SINGLE PHAZE MOTOR DIMENSIONS OF ENCLOSURENUMBER OF ZONES VOLTAGE COMBINED LOAD TYPE CURRENT RATING (RELAY) WIDTH HEIGHT DEPTH

HAFC101** 1 Zone 24 VAC Input 5 amps DPDT .18 1/6 HP(5A) @120VAC 4 1/4" 5 1/4" 2 3/4"HAFC201•• 1 Zone 24 VAC Input 5 amps DPDT .18 1/6 HP(5A) @120VAC 4 1/4" 5 1/4" 2 3/4"The Hydro Air Fan Controls are relay type DPDT, have a thermostat current of .18 and a single phase motor rating per zone of 1/6 HP (5A) @ 120 VAC.

Instruction SheetHydro Air Fan Controls

Printed in USA

Copyright 1999

TACO, Inc.

* Both HAFC101 and 201 capable of 1 and 2 speed applications



Printed in USA

Copyright 1999

TACO, Inc.


Printed in USA

Copyright 2000

TACO, Inc.

Instruction SheetPC600 Post Purge Timer Plug-In PowerPort Card

102-094

SUPERSEDES: August 1, 1997 EFFECTIVE: May 1, 2000

Plant ID No. 9300-867

Operation:Once the priority zone is satisfied, the PC600 maintains power to the circulator, but does not fire the boiler. The circulator purges excess heat into the priority zone,minimizing standby loss during warm weather months and optimizing boiler operation when used with a boiler reset control. Power can be maintained to the circu-lator from a minimum of 10 seconds to a maximum of 420 seconds. The power LED light is energized when the priority zone or the post purge card is in operation.Installation:The PC600 can be installed in any one of the PowerPort terminals located on the Taco Expandable (-EXP) Control(s). Remove the shunt/jumper between pins 9& 10 on the PowerPort terminal before installing the PC600. Align the connector on the base of the post purge card with the PowerPort terminal on the ExpandableControl and push until the two mate.XX Terminals (Optional):The XX terminals on the post purge card can be wired to TT on the boiler to fire only when the priority zone is calling for heat. If using a boiler with an internalreset control, wire the XX terminals in parallel with the TT connections of the internal reset control.

Instruction SheetPC605 Priority Protection Plug-In PowerPort Card

102-095

SUPERSEDES: MAY 1, 1998 EFFECTIVE: MAY 1, 2000

PLANT ID NO. 9300-1012

Operation:The PC605 Priority Protection Plug-In Card is a solid state control that helps prevent freeze-ups in the event of a priority zone failure. If the priority zone calls for heatcontinuously for more than one hour, power is returned to the space heating (non-priority) zones, allowing all zones to function independently. Once the priority zone issatisfied, the PC605’s auto-reset is activated and the priority zone is again allowed to have priority for up to one hour the next time it calls. The one hour time frame isnot adjustable. The red LED light is energized only when the Priority Protection Card is operating in priority override mode.

Installation:The PC605 can be installed in any unoccupied PowerPort terminal located on the Taco Expandable (-EXP) Control(s). Do not remove the shunt between pins 9 &10 on the Expandable Control unless a PC600 is also installed. Align the connector on the base of the priority protection card with the PowerPort terminal on theExpandable Control and push until the two mate. The PC605 can be used in conjunction with any other Taco PC style PowerPort Cards or Add-on Controls.


Printed in USA

Copyright 2000

TACO, Inc.

Operation:The PC610 Pump Exercise and Timer Plug-In Card is a solid state universal timer designed to cycle all the pumps that are attached to the Expandable Control(s)at selected time intervals. This minimizes seasonal start-up problems generally associated with harsh water conditions. The control can be configured to reducethe chance of freeze-ups by cycling the pumps more often during cold weather months. Bacteria can be minimized in heating systems that utilize domestic hotwater heaters as their heat source by systematically circulating the water.

Installation:The PC610 can be installed in any unoccupied PowerPort terminal located on the Taco Expandable (-EXP) Control(s). Do not remove the shunt between pins 9 & 10 onthe Expandable Switching Relay unless a PC600 is also installed. Align the connector on the base of the priority protection card with the PowerPort terminal on theExpandable Switching Relay and push until the two mate. The PC610 can be used in conjunction with any other Taco PC style PowerPort Cards or Add-on Controls.

Typical Settings:

Instruction SheetPC610 Pump Exercise and Timer Plug-In PowerPort Card

102-096

SUPERSEDES: May 31, 1998 EFFECTIVE: May 1, 2000

Plant ID No. 9300-1025

Application On Time Off TimePump Exercise 30 sec. 2 weeks

Bacteria Minimization 4 min. 12 hoursFreeze Protection 4 min. 1 hour


Printed in USA

Copyright 2000

TACO, Inc.

97

98

Standard Terms and Definitions

Switching Relay: Transformer and relay in one box, which allows a low voltage thermostat to control a line voltage load (circulator),with an isolated end switch that can energize the boiler.

Zone Valve Control: Transformer and relay in one box, which allows a low voltage thermostat to control a low voltage zone valve, withan isolated end switch that can energize the boiler and/or circulators.

Dry Contacts: Set of relay contacts that make and beak, where no voltage is present. Usually can switch 24 or 120 VAC.

Isolated End Set Switch: Set of dry contacts that make when a zone calls for heat. Usually connected to a boiler’s aquastat TT.

Mode Switch: Switch set to NORMAL – When any zone calls for heat, the end switch will make and fire the boiler.Switch set to RESET – When any zone calls for heat, a heat demand signal is given to external add-on reset control and it controlsboiler operation.Also when the priority zone calls for heat and is switched to priority, the end switch will override reset control andfire boiler to high limit.

TT: Where thermostat or aquastat connects on a heating control.

XX: Denotes Isolated End Switch.

Low Voltage: 24 VAC for most HVAC systems.

Line Voltage: Normally 120 VAC relative to ground.

H or L1: Hot side of line voltage.

N or L2: Neutral side of line voltage.

ZR: 120 VAC (Hot) signal from switching relay to boiler’s operating aquastat to fire the burner to high limit when any zone calls forheat. Also ideal for controlling primary circulator.

ZC: 120 VAC (Hot) signal from boiler’s operating aquastat to switching relay allowing circulator(s) to run when aquastat is above theset low limit.

Cold Start: A boiler that fires only when there is a call for heat.

Tankless Coil: A method of heating domestic water utilizing a heat exchanger inside a boiler.The boiler also maintains heat year roundto deliver hot water on demand.

DHW Heater: A method of heating domestic water utilizing a heat exchanger and storage tank.

Transformer: A component for increasing or reducing AC voltage. Rated in VA (volts x amps).

OHMS Law: Example: A 24 volt, 40 VA transformer can produce how much current?

Current = VA / Voltage 40 / 24 = 1.6 Amps

I = E/R where I = Current in AmpsR = E/I R = Resistance in OhmsE = I x R E = Volts

W = E x I W = Watts or VAI = W(VA)/E

RELAY CONTACTS:

N/C: Normally closed connection of a relay, when not energized.N/O: Normally open connection of a relay, when not energized.Com: The common terminal for normally open and normally closed.Pole: The number of independent circuits of a switch or relay.

Throw: The number of settings which a switch or relay can have.

DPDT = Double Pole Double Throw

N/O N/C N/C N/O3 4 4 6 6 5

COM COM

99

TACO

Zon

e Co

ntro

ls Cr

oss-

Refe

renc

e

TA

CO

AR

GO

ER

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ON

EY

WE

LL

WH

ITE

-RO

GE

RS

SW

ITC

HIN

G R

EL

AY

S

1 Z

one

Switc

hing

Rel

ay (

DPD

T)

SR50

1A

R82

1 (1

),A

R82

2SR

100

RA

89A

(2)

,RA

845A

(1)

,RA

832A

(1)

889-

189

(2),

829-

845

(1)

1 Z

one

Switc

hing

Rel

ay R

epla

cem

ent

PC B

oard

(D

TSP

)SR

501-

845R

P2

Zon

e Sw

itchi

ng R

elay

with

Pri

ority

SR50

2A

R-8

61-2

(3)

SR20

13

Zon

e Sw

itchi

ng R

elay

with

Pri

ority

SR50

3A

R-8

61-3

(3)

SR30

1R

8888

A10

074

Zon

e Sw

itchi

ng R

elay

with

Pri

ority

SR50

4A

R-8

42SR

601

R88

88B1

005

6 Z

one

Switc

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Rel

ay w

ith P

rior

itySR

506

AR

-866

SR60

1 (4

)

SW

ITC

HIN

G R

EL

AY

SW

ITH

PO

WE

RP

OR

T O

PT

ION

S

3 Z

one

Switc

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Rel

ay w

ith P

rior

ity a

nd 3

Pow

er P

orts

SR50

3-EX

PA

RM

-861

-DP

(5,6

),A

RM

-3P

4 Z

one

Switc

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Rel

ay w

ith P

rior

ity a

nd 3

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er P

orts

SR50

4-EX

PA

RM

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-DP

(5,6

),A

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-4P

6 Z

one

Switc

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Rel

ay w

ith P

rior

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nd 3

Pow

er P

orts

SR50

6-EX

PA

RM

-866

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(5,6

),A

RM

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ZO

NE

VA

LVE

CO

NT

RO

LS

3 Z

one

Valv

e C

ontr

olZ

VC

403

(7)

AZ

-3R

8889

A10

144

Zon

e Va

lve

Con

trol

with

Pri

ority

ZV

C40

4 (7

)A

Z-4

PR

8889

B101

25

Zon

e Va

lve

Con

trol

ZV

C40

5 (7

)A

Z-5

VL5

00 (

8)6

Zon

e Va

lve

Con

trol

with

Pri

ority

ZV

C40

6 (7

)A

Z-6

PV

L500

(8)

ZO

NE

VA

LVE

CO

NT

RO

LS

WIT

H P

OW

ER

PO

RT

OP

TIO

NS

4 Z

one

Valv

e C

ontr

ol w

ith P

rior

ity a

nd 2

Pow

er P

orts

ZV

C40

4-EX

P6

Zon

e Va

lve

Con

trol

with

Pri

ority

and

2 P

ower

Por

tsZ

VC

406-

EXP

PL

UG

IN

PO

WE

RP

OR

T C

AR

DS

Post

Pur

ge T

imer

Plu

g-In

Car

dPC

600

Prio

rity

Pro

tect

ion

Plug

-In C

ard

PC60

5D

PM-1

Uni

vers

al T

imer

/Pum

p Ex

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ze P

lug-

In C

ard

PC61

0

100

TACO

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ls Cr

oss-

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renc

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ontin

ued)

TA

CO

AR

GO

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WE

LL

WH

ITE

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GE

RS

AD

D-O

N P

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ER

CO

NT

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LS

Boile

r R

eset

Con

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PC70

0D

PM-2

BB12

002-

Stag

e Bo

iler

Res

et C

ontr

olPC

702

Vari

able

Spe

ed P

ump

Inje

ctio

n M

ixin

g C

ontr

olPC

705

BB30

00

FAN

CO

NT

RO

LS

1 Z

one

Hyd

ro A

ir F

an C

ontr

ol (

1 or

2 S

peed

)H

AFC

101

AR

H-1

,AR

H-2

,AR

H-3

WA

300

1 Z

one

Hyd

ro A

ir F

an C

ontr

ol w

ith T

ime

Del

ays

(1 o

r 2

Spee

d)H

AFC

201

RE

PL

AC

EM

EN

T P

AR

TS

24 V

olt

Rep

lace

men

t R

elay

SR02

4-00

1RP

R-3

5EX

P10

120

Volt

Rep

lace

men

t R

elay

SR12

0-00

1RP

R-4

9

NO

TE

S:

1.D

oes

not

have

bot

h no

rmal

ly o

pen

and

norm

ally

clo

sed

cont

acts

.2.

Has

onl

y on

e se

t of

nor

mal

ly o

pen

cont

acts

(SP

ST).

3.D

oes

not

have

opt

iona

l pri

ority

.4.

Can

be

expa

nded

to

five

and

six

zone

s w

ith t

he a

dditi

on o

f EX

P10

rela

ys.

5.A

rgo

AR

M u

nits

are

exp

anda

ble

to 1

0 zo

nes

usin

g sp

ecia

l con

trol

s (A

RM

-1,A

RM

-4)

with

a p

hone

jack

.TA

CO

sw

itchi

ng r

elay

s ca

n be

exp

ande

d up

to

20 z

ones

usi

ng a

ny c

ombi

natio

n of

-EX

P m

odel

s w

ith n

o sp

ecia

l con

nect

ions

.6.

Incl

udes

onl

y on

e da

ta p

ort

for

addi

ng d

ata

port

mod

ules

.7.

All

TAC

O z

one

valv

e co

ntro

ls in

clud

e an

ext

ra s

et o

f dry

con

tact

s (N

/O,C

omm

on,N

/C).

8.V

L500

is o

nly

5 zo

nes,

4 no

rmal

and

1 p

rior

ity.

CONTROLS MADE EASY.®

TACO, INC., 1160 Cranston Street, Cranston, RI 02920 Telephone: (401) 942-8000 FAX: (401) 942-2360.TACO (Canada), Ltd., 8450 Lawson Road, Unit #3, Milton, Ontario L9T 0J8. Telephone: 905/564-9422. FAX: 905/564-9436.


Printed in USA

Copyright 2010

TACO, Inc.

Documents

TACO ZONE CONTROLS WIRING GUIDE · 2019-02-04 · TACO ZONE CONTROLS WIRING GUIDE Pages Switching Relays – Single Zone Wiring 2 – 2 Switching Relays – Oil Boiler Wiring Safety