Embed Size (px)
Citation preview
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.PC 111 Catalog No. 533-356 Printed in U.S.A. Form 33ZC-2SI Pg 1 3-00 Replaces: NewBook 1 4
Tab 11a 13a
Installation, Start-Up andConfiguration Instructions
Part Number 33ZCFANCOL
CONTENTSPage
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . 1GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-26General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2Fan Coil Controller Hardware. . . . . . . . . . . . . . . . . . . . . 2Field-Supplied Hardware . . . . . . . . . . . . . . . . . . . . . . . . . 2• SPACE TEMPERATURE SENSOR• SUPPLY AIR TEMPERATURE (SAT) SENSOR• CHANGEOVER SENSOR• LINKAGE THERMOSTAT• RELATIVE HUMIDITY SENSOR• INDOOR AIR QUALITY (CO2) SENSORMount Fan Coil Controller . . . . . . . . . . . . . . . . . . . . . . . . 2• LOCATION• MOUNTINGConnect the Power Transformer . . . . . . . . . . . . . . . . . . 4Fan Coil Controller Inputs and Outputs . . . . . . . . . . 4Install Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13• SPACE TEMPERATURE SENSOR INSTALLATION• SUPPLY AIR TEMPERATURE (SAT) SENSOR
INSTALLATION• INDOOR AIR QUALITY SENSOR INSTALLATION• HUMIDITY SENSOR (WALL-MOUNTED)
INSTALLATIONConnect the Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21Connect Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . 21Connect the CCN Communication Bus . . . . . . . . . . 26• COMMUNICATION BUS WIRE SPECIFICATIONS• CONNECTION TO THE COMMUNICATION BUSSTART-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27Perform System Check-Out . . . . . . . . . . . . . . . . . . . . . 27Initial Operation and Test. . . . . . . . . . . . . . . . . . . . . . . . 27Fan, Heat, and Cool Configuration and Test . . . . . 27CONFIGURATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27-43Points Display Table. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27Alarm Service Configuration Table . . . . . . . . . . . . . . 30Controller Identification Screen . . . . . . . . . . . . . . . . . 31Holiday Configuration Screens . . . . . . . . . . . . . . . . . . 31Occupancy Configuration Screen . . . . . . . . . . . . . . . 31Set Point Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32Service Configuration Selection. . . . . . . . . . . . . . . . . 34Fan Coil Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . 37Occupancy Maintenance Table . . . . . . . . . . . . . . . . . . 38Fan Coil Maintenance Table . . . . . . . . . . . . . . . . . . . . . 39Water System Manager Maintenance Screen . . . . 42
SAFETY CONSIDERATIONS
GENERAL
The Fan Coil Controller is a field retrofit, low cost, CCN(Carrier Comfort Network) control for fan coil units. The fancoil controller is a microprocessor-based direct digital control(DDC) controller for fan coil units. It can be retrofitted ondirect drive fan units manufactured by Carrier or other manu-facturers to provide precise temperature control for applica-tions of 2,000 cfm or less.
The fan coil controller can function as either a stand-alonecontrol or as part of the CCN. User interfaces include the CCNService Tool, ComfortVIEW™, and ComfortWORKS® soft-ware. When used as part of the CCN, other devices such as theCCN Data Transfer, Linkage Thermostat, or Comfort Control-ler can read data from or write data to the fan coil controller.
SAFETY NOTEAir-handling equipment will provide safe and reliable
service when operated within design specifications. Theequipment should be operated and serviced only byauthorized personnel who have a thorough knowledgeof system operation, safety devices and emergencyprocedures.
Good judgement should be used in applying any manu-facturer’s instructions to avoid injury to personnel or dam-age to equipment and property.
Disconnect all power to the unit before performing mainte-nance or service. Unit may automatically start if power isnot disconnected. Electrical shock and personal injurycould result.
If it is necessary to remove and dispose of mercury contac-tors in electric heat section, follow all local, state, and fed-eral laws regarding disposal of equipment containinghazardous materials.
Damage to equipment may result. An individual field-supplied 24-VAC power transformer is required for eachfan coil controller. The transformer must be less than100 VA to meet UL Class 2.
Fan Coil Controller
2
INSTALLATION
General — The fan coil controller is connected to a wall-mounted, field-supplied, space temperature sensor (SPT) inorder to monitor zone temperature changes and satisfy zonedemand.
On all heating or cooling applications, the fan coil controllermust be connected to a field-installed and -supplied supply airtemperature (SAT) sensor to monitor the temperature of the airdelivered by the fan coil.
Carrier’s Network Service Tool can be connected to the sys-tem at the SPT sensor if CCN communication wiring is run toan RJ-11 jack at the SPT sensor. The Network Service Tool canbe used to adjust set points, set operating parameters, and fullyconfigure the fan coil controller or any device on the system.See Fig. 1.
Fan Coil Controller Hardware — The fan coil con-troller consists of the following hardware:• control module• plastic enclosure• two no. 8 x 1/2-in. sheet metal screws (for fan coil con-
troller mounting to fan coil)Figure 2 shows the fan coil controller physical details.
Field-Supplied Hardware — Each fan coil controllerrequires the following field-supplied components to completeits installation:• fan coil unit• space temperature sensor (33ZCT55SPT, 33ZCT56SPT,
or 33ZCT57SPT)• transformer — 24 vac, 40 va (standard applications)• changeover sensor (required for 2-pipe applications)• contactors (as required for fan, electric heat, or DX cool-
ing)• supply air temperature sensor (33ZCSENSAT) with two
no. 10 x 1/2-in. sheet metal screws (to secure SAT sensorto fan coil unit)
• indoor air quality sensor (as required)• relative humidity sensor (as required)• valve and actuator for hot water heat or chilled water (as
required)• linkage thermostat (as required)SPACE TEMPERATURE SENSOR — Each fan coil con-troller requires a field-supplied Carrier space temperature sen-sor. There are three sensors available for this application:• 33ZCT55SPT, Space Temperature Sensor with Override
Button• 33ZCT56SPT, Space Temperature Sensor with Override
Button and Set Point Adjustment• 33ZCT57SPT, Space Temperature Sensor with Override
Button, Set Point Adjustment, and Manual Fan Speedcontrol
SUPPLY AIR TEMPERATURE (SAT) SENSOR — Thefan coil controller must be connected to a field-supplied supplyair temperature (SAT) sensor (part number 33ZCSENSAT) tomonitor the temperature of the air delivered by the fan coil.CHANGEOVER SENSOR — The 33ZCSENCHG change-over sensor is used by the fan coil controller in 2-pipe applica-tions to determine the temperature of the heating and coolingmedium which is supplied to the fan coil by the building pipingsystem. The fan coil controller can then determine if it is capa-ble of providing heating or cooling to the space based on sens-ing the pipe water temperature. This value may be broadcast toother fan coils.LINKAGE THERMOSTAT — The linkage thermostat(33CSKITLST-01) is used to control multiple units from a sin-gle thermostat. The linkage thermostat provides thermostatfunctions for up to 8 units. Thermostat functions include spacetemperature sensing, remote set point adjustment, and occu-pancy information. The linkage thermostat can be used in placeof any space temperature sensor. If fail-safe operation is re-quired, it is recommended to also install a 33ZCSENSAT in thereturn air duct of each unit, wired to the space temperature sen-sor input of the fan coil controller.RELATIVE HUMIDITY SENSOR — The 33AMSENRHS000relative humidity sensor is an indoor, wall-mounted sensor andis required for zone humidity control (dehumidification).INDOOR AIR QUALITY (CO2) SENSOR — An indoor airquality sensor is required for IAQ monitoring. Three differentCO2 sensors are available for zone CO2 level monitoring.
The 33ZCSENCO2 sensor is an indoor, wall mounted sen-sor with an LED (light-emitting diode) display.
The 33ZCT55CO2 sensor is an indoor, wall mounted sen-sor without display. The CO2 sensor also includes a space tem-perature sensor with override button.
The 33ZCT56CO2 sensor is an indoor, wall mounted sen-sor without display. The CO2 sensor also includes a space tem-perature sensor with override button and temperature offset.
Mount Fan Coil ControllerLOCATION — The fan coil controller should be located in-side one of the available service access panels of the fan coilunit. The fan coil controller may also be mounted on the exteri-or of the fan coil unit. Select a location which will be safe fromwater damage and allow sufficient access for service and wir-ing. For service access, there should be at least 6 in. of clear-ance between the front of the fan coil controller and adjacentsurfaces. Refer to Fig. 3.MOUNTING — Mount the fan coil controller to the desiredlocation by holding the fan coil controller in place and screw-ing two no. 8, pan-head, Phillips, sheet metal screws providedthrough two of the holes available in the plastic base on theeither side of the fan coil controller.
3
CCN PRIMARY BUS (BUS 0)
CC6400 OR CSAMEQUIPPED
NON-CARRIERAIR HANDLER
COMFORTIDEQUIPPED
AIR TERMINAL(1 OF UP TO 128)
ADDRESSEDSEQUENTIALLY
SECONDARY BUS
DATACOLLECTION
OPTION
BRIDGE(RECOMMENDED)
SYSTEMMONITORINGSOFTWARE
CCN
FAN COILCONTROLLER
TYPICALFAN COIL UNIT
FAN COILCONTROLLER
TYPICALFAN COIL UNIT
FULLY CCNCOMPATIBLE CARRIER
AIR HANDLER
LEGEND
Fig. 1 — Typical Carrier Comfort Network System with Fan Coil Units
CCN — Carrier Comfort NetworkCSAM — Comfort System AirManager™
4
Connect the Power Transformer — An individual,field-supplied, 24 vac power transformer is required for eachfan coil controller. Transformers must be UL Class 2 rated.Standard applications require a 24 VAC transformer, rated at40 VA minimum. All transformer secondaries are required tobe grounded. Use only stranded copper conductors for all wir-ing to the fan coil controller. Wiring connections must be madein accordance with NEC (National Electrical Code) and localcodes. Ground on the side of the transformer secondary at thetransformer location. Connect the grounded side of the trans-former to J1-2. Connect the live side of the transformer second-ary to J1-1. Connect an 18-gage, green ground wire from ter-minal J1-3 to the metal chassis of the unit.
The power supply is 24 vac ± 10% at 40 va (50/60 Hz).For fan coil controllers, the power requirement sizing
allows for accessory water valves and for the fan contactor.Water valves are limited to 10 va on both two-position andmodulating hot water. The fan contactor is limited to 3 va(holding) for each fan output.NOTE: If a water valve contactor exceeds these limits, orexternal contactors are required for electric heat, then it isrecommended a 60 va transformer be used. The maximumrating for any single output is 20 va.NOTE: Do not run sensor or communication wiring in thesame conduit with line-voltage wiring.NOTE: An accessory conduit box (part no. 33ZCCONBOX)is available for conduit wiring connections to the fan coilcontroller.
Perform the following steps to connect the powertransformer:
1. Install the field-supplied transformer in an electricalenclosure that conforms to NEC and local codes.
2. Connect 24 vac from the transformer as shown in theapplicable wiring diagram (Fig. 4-10). Be sure toobserve polarity when connecting the transformerpower. The grounded terminal must be connected tothe transformer ground terminal as shown.
Fan Coil Controller Inputs and Outputs — Thefan coil controller inputs and outputs are shown in Fig. 11-13.
J4
RH
GND
IAQ
+10V
SPEED
GND
CONDSWGND
+24VSPT
GND
SAT
T56
GND
CNGOVR
REMOTE
J3J1
SR
VC
24V
AC +
G-
Part Number: 33ZCFANCOL
S/N:
Bus#:
Element#:
Unit#:
J5
VLV
/DX
1C
OM
VLV
/DX
2H
EA
T1
24V
AC
HE
AT
2
ZONE Controller®
C US
1 6
31
+
G-
J2A
CC
N LEN
J2B
+
G-
11
13
3
2
15 16
FAN ACFAN ON
LOWMEDHIGH
J6
15
LED1
LED2
24VACOAD ENAJ7
12
Fig. 2 — Fan Coil Controller
3 IN.
ALLOW 12-IN. FOR SERVICE
FAN COILUNIT
FAN COILCONTROLLER
Fig. 3 — Service Clearance for Fan Coil Zone Controller Mounting
5
OA
D
24V
AC
CH
G
M
SA
T
SP
T
com
mun
icat
ions
CC
N
Not
Use
d
com
mun
icat
ions
CC
N
C O M
C LO P
2 4 v
J1
1 2 3
+24
V D
C
as r
equi
red
Con
nect
to th
e ap
prop
riate
mot
or s
peed
retu
rn v
alve
mod
ulat
ing
sprin
gO
ptio
nal 2
4VA
C fo
r
from
a T
56 s
enso
rA
dd th
is w
ire fo
r S
etpo
int A
djus
tmen
t
GN
D
M B
LU
L R
ED
H B
LKW
HT
valv
e
24V
AC
DX
2V
alve
Equ
ipm
ent G
roun
d
Tran
sfor
mer
Gro
und
Fan
Rel
ay
Fan
Mot
or
Vol
tage
Line
Vol
tage
Line
ON
FAN
HE
AT
2H
EA
T1
CO
M
CO
ND
SW
RE
MO
TE
CN
GO
VR
T56
SA
T
SP
T
IAQ
SP
EE
D
+10
V
GN
DG
ND
GN
D
GN
DG
ND
RH
Dam
per
Air
Fre
sh
HIG
H
ME
D
LOW
FAN
AC
BWR
B -WR +
24 V
AC
DX
1V
alve
valv
es2
posi
tion
term
inal
on
to c
lose
Elim
inat
e w
ire
Fig
. 4 —
Fan
Co
il C
on
tro
ller
Wir
ing
— T
wo
-Pip
e, S
ing
le S
pee
d F
an A
pp
licat
ion
s
6
+24
V D
C
OA
D
24V
AC
Equ
ipm
ent G
roun
d
valv
es2
posi
tion
term
inal
on
to c
lose
Elim
inat
e w
ire
retu
rn v
alve
mod
ulat
ing
sprin
gO
ptio
nal 2
4VA
C fo
r
HIG
H
LOW
ME
D
sens
orsp
eed
cont
rol f
rom
a T
57A
dd th
ese
wire
s fo
r m
anua
l
T56
or
T57
sen
sor
from
aS
etpo
int a
djus
tmen
tA
dd th
is w
ire fo
r
CH
G
SP
T
BLK
M B
LUL
RE
D
H B
LKW
HT
Val
ve
24V
AC
DX
2V
alve
Tran
sfor
mer
Gro
und
Fan
Rel
ays
Fan
Mot
or
Vol
tage
LineVol
tage
Line
M
SA
T
ON
FAN
HE
AT
2H
EA
T1
CO
M
CO
ND
SW
RE
MO
TE
CN
GO
VR
T56SA
TSP
T
IAQ
SP
EE
D
+10
V
GN
DG
ND
GN
D
GN
DG
ND
RH
Dam
per
Air
Fre
sh
HIG
H
ME
D
LOW
FAN
AC
BWR
-BGN
DW+R
24 V
AC
DX
1V
alve
com
mun
icat
ions
CC
N
Not
Use
d
com
mun
icat
ions
CC
N
C O M
C LO P
24 V
J1
1 2 3
Fig
. 5 —
Fan
Co
il C
on
tro
ller
Wir
ing
— T
wo
-Pip
e, T
hre
e-S
pee
d F
an w
ith
Op
tio
nal
Man
ual
Sp
eed
Co
ntr
ol A
pp
licat
ion
s
7
+24
V D
C
as r
equi
red
Con
nect
to th
e ap
prop
riate
mot
or s
peed
OA
D
24V
AC
Equ
ipm
ent G
roun
d
valv
es2
posi
tion
term
inal
on
to c
lose
Elim
inat
e w
ire
valv
esS
prin
g re
turn
Mod
ulat
ing
VA
C fo
rO
ptio
nal 2
4
T56
or
T57
sen
sor
from
aS
etpo
int a
djus
tmen
tA
dd th
is w
ire fo
r
M B
LU
L R
ED
H B
LKW
HT
CW
V
24V
AC
DX
2V
alve
Tran
sfor
mer
Gro
und
Fan
Rel
ay
HW
V
Fan
Mot
or
Vol
tage
Line
Vol
tage
Line
M
SA
T
SP
T
ON
FAN
HE
AT
2H
EA
T1
CO
M
CO
ND
SW
RE
MO
TE
CN
GO
VR
T56SA
T
SP
T
IAQ
SP
EE
D
+10
V
GN
DG
ND
GN
D
GN
DG
ND
RH
Dam
per
Air
Fre
sh
HIG
H
ME
D
LOW
FAN
AC
BWR
-BGN
DW+R
24 V
AC
DX
1V
alve
com
mun
icat
ions
CC
N
Not
Use
d
com
mun
icat
ions
CC
N
C O M
C O MC L
C LO P
O P
2 4 V
2 4 V
J1
1 2 3
Fig
. 6 —
Fan
Co
il C
on
tro
ller
Wir
ing
— F
ou
r-P
ipe,
Sin
gle
Sp
eed
Ap
plic
atio
ns
8
+24
V D
C
OA
D
24V
AC
Equ
ipm
ent G
roun
d
valv
es2
posi
tion
term
inal
on
to c
lose
Elim
inat
e w
ire
valv
esS
prin
g re
turn
mod
ulat
ing
VA
C fo
rO
ptio
nal 2
4
HIG
HM
ED
LOW
sens
orsp
eed
cont
rol f
rom
a T
57A
dd th
ese
wire
s fo
r m
anua
l
T56
or
T57
sen
sor
from
aS
etpo
int a
djus
tmen
tA
dd th
is w
ire fo
r
SP
T
BLK
M B
LUL
RE
D
H B
LKW
HT
CW
V
24V
AC
DX
2V
alve
Tran
sfor
mer
Gro
und
Fan
Rel
ays
HW
V
Fan
Mot
or
Vol
tage
Line
Vol
tage
Line
M
SA
T
ON
FAN
HE
AT
2H
EA
T1
CO
M
CO
ND
SW
RE
MO
TE
CN
GO
VR
T56
SA
T
SP
T
IAQ
SP
EE
D
+10
V
GN
DG
ND
GN
D
GN
DG
ND
RH
Dam
per
Air
Fre
sh
HIG
H
ME
D
LOW
FAN
AC
BWR
-BGN
DW+R
24 V
AC
DX
1V
alve
com
mun
icat
ions
CC
N
Not
Use
d
com
mun
icat
ions
CC
N
C O M
C O M
C LC L
O PO P
2 4 V
2 4 V
J1
1 2 3
Fig
. 7 —
Fan
Co
il C
on
tro
ller
Wir
ing
— F
ou
r-P
ipe,
Th
ree-
Sp
eed
Fan
wit
h O
pti
on
al M
anu
al S
pee
d C
on
tro
l Ap
plic
atio
ns
9
+24
V D
C
OA
D
24V
AC
Equ
ipm
ent G
roun
d
HIG
HM
ED
LOW
sens
orsp
eed
cont
rol f
rom
a T
57A
dd th
ese
wire
s fo
r m
anua
l
T56
or
T57
sen
sor
from
aS
etpo
int a
djus
tmen
tA
dd th
is w
ire fo
r
HE
AT
2H
EA
T1
DX
2D
X1
Coo
l Rel
ays
Hea
t Rel
ays
SP
T
BLK
M B
LUL
RE
D
H B
LKW
HT
24V
AC
DX
2V
alve
Tran
sfor
mer
Gro
und
Fan
Rel
ays
Fan
Mot
or
Vol
tage
Line
Vol
tage
Line
M
SA
T
ON
FAN
HE
AT
2H
EA
T1
CO
M
CO
ND
SW
RE
MO
TE
CN
GO
VR
T56S
AT
SP
T
IAQ
SP
EE
D
+10
V
GN
DG
ND
GN
D
GN
DG
ND
RH
Dam
per
Air
Fre
sh
HIG
H
ME
D
LOW
FAN
AC
BWR
-B
GN
DW+R
24 V
AC
DX
1V
alve
com
mun
icat
ions
CC
N
Not
Use
d
com
mun
icat
ions
CC
N
2 31
J1
Fig
. 8 —
Fan
Co
il C
on
tro
ller
Wir
ing
— T
wo
-Sta
ge
DX
Co
olin
g, T
wo
-Sta
ge
Ele
ctri
c H
eat,
T
hre
e-S
pee
d F
an w
ith
Op
tio
nal
Man
ual
Sp
eed
Co
ntr
ol A
pp
licat
ion
s
10
+24
V D
C
OA
D
24V
AC
Equ
ipm
ent G
roun
d
HIG
HM
ED
LOW
2 4 V
C LO P
C O MH
WV
sens
orsp
eed
cont
rol f
rom
a T
57A
dd th
ese
wire
s fo
r m
anua
l
T56
or
T57
sen
sor
from
aS
etpo
int a
djus
tmen
tA
dd th
is w
ire fo
r
DX
2D
X1
Coo
l Rel
ays
SP
T
BLK
M B
LUL
RE
D
H B
LKW
HT
24V
AC
DX
2V
alve
Tran
sfor
mer
Gro
und
Fan
Rel
ays
Fan
Mot
or
Vol
tage
Line
Vol
tage
Line
M
SA
T
ON
FAN
HE
AT
2H
EA
T1
CO
M
CO
ND
SW
RE
MO
TE
CN
GO
VR
T56
SA
T
SP
T
IAQ
SP
EE
D
+10
V
GN
DG
ND
GN
D
GN
DG
ND
RH
Dam
per
Air
Fre
sh
HIG
H
ME
D
LOW
FAN
AC
BWR
-B
GN
DW+R
24 V
AC
DX
1V
alve
valv
esS
prin
g re
turn
mod
ulat
ing
VA
C fo
rO
ptio
nal 2
4
com
mun
icat
ions
CC
N
Not
Use
d
com
mun
icat
ions
CC
N
J1
1 2 3
Fig
. 9 —
Fan
Co
il C
on
tro
ller
Wir
ing
— T
wo
-Sta
ge
DX
Co
olin
g, M
od
ula
tin
g H
eat,
T
hre
e-S
pee
d F
an w
ith
Op
tio
nal
Man
ual
Sp
eed
Co
ntr
ol A
pp
licat
ion
s
11
+24
V D
C
OA
D
24V
AC
Equ
ipm
ent G
roun
d
HIG
HM
ED
LOW
CW
V
sens
orsp
eed
cont
rol f
rom
a T
57A
dd th
ese
wire
s fo
r m
anua
l
T56
or
T57
sen
sor
from
aS
etpo
int a
djus
tmen
tA
dd th
is w
ire fo
r
HE
AT
2H
EA
T1H
eat R
elay
s
SP
T
BLK
M B
LUL
RE
D
H B
LKW
HT
24V
AC
DX
2V
alve
Tran
sfor
mer
Gro
und
Fan
Rel
ays
Fan
Mot
or
Vol
tage
LineVol
tage
Line
M
SA
T
ON
FAN
HE
AT
2H
EA
T1
CO
M
CO
ND
SW
RE
MO
TE
CN
GO
VR
T56
SA
T
SP
T
IAQ
SP
EE
D
+10
V
GN
DG
ND
GN
D
GN
DG
ND
RH
Dam
per
Air
Fre
sh
HIG
H
ME
D
LOW
FAN
AC
BWR
-B
GN
DW+R
24 V
AC
DX
1V
alve
com
mun
icat
ions
CC
N
Not
Use
d
com
mun
icat
ions
CC
N
C O M
C LO P
2 4 V
Opt
iona
l24
VA
C fo
rm
odul
atin
gS
prin
g re
turn
valv
es
J1
1 2 3
Fig
. 10
— F
an C
oil
Co
ntr
olle
r W
irin
g —
Mo
du
lati
ng
Co
olin
g, T
wo
-Sta
ge
Ele
ctri
c H
eat,
T
hre
e-S
pee
d F
an w
ith
Op
tio
nal
Man
ual
Sp
eed
Co
ntr
ol A
pp
licat
ion
s
12
2 4 6 8 10 12 14 16
1 3 5 7 9 11 13 15
+24VDC SUPPLY
SPT
GROUND
SAT
REMOTE S/S
CHANGEOVER SENSOR
GROUND
T56 SETPOINT OFFSET
GROUND
COND PUMP
GROUND
MANUAL SPEED +10V (DI)
IAQ
GROUND
RH
J4
1 2 3 4 5
J6 J7
1 2
24VAC
OAD
FAN (24VAC)
FAN ON
LO SPEED
MED SPEED
HIGH SPEED
LEGEND
*Use shielded wire.
NOTES:1. Terminals 1 and 3 provide switched 24 VAC
output power to the load.2. Terminal 5 connects to field-supplied 24 VAC.3. The 24 v connection (J4-16) is required for
RH sensor only.
DI — Direct InputIAQ — Indoor Air QualityRH — Relative HumiditySAT — Supply-Air TemperatureSPT — Space TemperatureS/S — Start/Stop
Fig. 11 — Fan Coil Controller Inputs
Fig. 12 — Fan Coil Controller Daughter Board Outputs
Daughter Board Outputs (J6, J7)
*For single-speed fan units, connect fan start/stop to control fan contactor.NOTE: J6-1 must be jumpered to 24 VAC +. (J1-1).
CHANNEL TERMINATIONS(+,–) DESCRIPTION CONTROL DEVICEFAN AC J6-1, J1-1 Fan Input Power 24V, 5AFAN ON J6-2, J1-2 Fan Start/Stop* 24V, 5A
LOW J6-3, J1-2 Low Speed 24V, 5AMED J6-4, J1-2 Med Speed 24V, 5A
HI J6-5, J1-2 High Speed 24V, 5AOAD J7-1, J7-2 Outdoor Air Damper 24 VAC 1A
Inputs (J4)
CHANNEL J4 PINS (+,–) DESCRIPTION CONTROL DEVICESPT 14, 12 Space Temperature 10K ThermistorSAT 10, 12 Supply Air Temperature 10K Thermistor
SP_OFFSET (T56/T57) 8, 12 Set Point Offset Adjust 100K PotentiometerCNGOVR 4, 6 Changeover Sensor 10K Thermistor
RH 16 (24 VDC), 15 (+), 13 (–) RH Sensor 2-10 VDC
SPEED 9*, 7 (+), 5 (–) Manual Speed Position 0-10 VDCCONDSW 3, 9* Condensate Pump Sensor 0-10 V (DI)
IAQ 11 (+), 13 (–) Indoor Air Quality Sensor 0-10 VDCREMOTE S/S 2, 16 (24 VDC) Remote Start/Stop 24 VAC (DI)
13
Install SensorsSPACE TEMPERATURE SENSOR INSTALLATION —A space temperature sensor must be installed for each fan coilcontroller. There are three types of SPT sensors available fromCarrier: the 33ZCT55SPT space temperature sensor with timedoverride button, the 33ZCT56SPT space temperature sensorwith timed override button and set point adjustment, and the33ZCT57SPT space temperature sensor with timed overridebutton, set point adjustment, and manual fan speed control. SeeFig. 14 and 15.
The space temperature sensor is used to measure the build-ing interior temperature and should be located on an interiorbuilding wall. The sensor wall plate accommodates the NEMAstandard 2 x 4 junction box. The sensor can be mounted direct-ly on the wall surface if acceptable by local codes.
Do not mount the sensor in drafty locations such as near airconditioning or heating ducts, over heat sources such as base-board heaters, radiators, or directly above wall mounted light-ing dimmers. Do not mount the sensor near a window whichmay be opened, near a wall corner, or a door. Sensors mountedin these areas will have inaccurate and erratic sensor readings.
The sensor should be mounted approximately 5 ft from thefloor, in an area representing the average temperature in thespace. Allow at least 4 ft between the sensor and any cornerand mount the sensor at least 2 ft from an open doorway.
Install the sensor as follows (see Fig. 15):1. Locate the two Allen type screws at the bottom of the
sensor. 2. Turn the two screws clockwise to release the cover
from the sensor wall mounting plate.3. Lift the cover from the bottom and then release it from
the top fasteners.4. Feed the wires from the electrical box through the
opening in the center of the sensor mounting plate.5. Using two no. 6-32 x 1 mounting screws (provided
with the sensor), secure the sensor to the electrical box.
NOTE: Sensor may also be mounted directly on thewall using 2 plastic anchors and 2 sheet metal screws(field-supplied).
6. Use 20 gage wire to connect the sensor to the control-ler. The wire is suitable for distances of up to 500 ft.Use a three-conductor shielded cable for the sensorand set point adjustment connections. The standardCCN communication cable may be used. If the setpoint adjustment (slidebar) is not required, then anunshielded, 18 or 20 gage, two-conductor, twisted paircable may be used.The CCN network service jack requires a separate,shielded CCN communication cable. Always use sepa-rate cables for CCN communication and sensor wir-ing. (Refer to Fig. 16-18 for wire terminations.)
7. Replace the cover by inserting the cover at the top ofthe mounting plate first, then swing the cover downover the lower portion. Rotate the two Allen headscrews counterclockwise until the cover is secured tothe mounting plate and locked in position.
8. For more sensor information, see Table 1 for ther-mistor resistance vs temperature values.
NOTE: Clean sensor with damp cloth only. Do not usesolvents.Wiring the Space Temperature Sensor — To wire the sensor,perform the following (see Fig. 16-18):
1. Identify which cable is for the sensor wiring. 2. Strip back the jacket from the cables for at least
3-inches. Strip 1/4-in. of insulation from each conduc-tor. Cut the shield and drain wire from the sensor endof the cable.
3. Connect the sensor cable as follows:a. Connect one wire from the cable (RED) to the
SPT terminal on the controller. Connect the otherend of the wire to the left terminal on the SEN ter-minal block of the sensor.
VALVE/DX1 (OPEN)
GROUND
VALVE/DX2 (CLOSE)
HEAT CLOSE/STAGE 2
COMMON (24VAC)
HEAT OPEN/STAGE 1
1 2 3 4 5 6
J5
Baseboard Outputs (J5)
NOTES:1. (A) Terminals 1 and 3 provide switched 24 VAC output power to the
load.2. (B) J5-5 must be jumpered to 24 VAC + (31-1).
CHANNEL J5 Pins (+,–) DESCRIPTION CONTROL DEVICEValve DX1 (A) 1, 2 Open 24 VAC, 1AValve DX2 (A) 3, 2 Close 24 VAC, 1AHEAT_ST1 (B) 5, 4 Heat Open, 1st Stage 24 VAC, 1AHEAT_ST2 (B) 5, 6 Heat Close, 2nd Stage 24 VAC, 1A
Fig. 13 — Fan Coil Controller Baseboard Outputs
14
b. Connect another wire from the cable (BLACK) tothe GND terminal on the controller. Connect theother end of the wire to the remaining open termi-nal on the SEN terminal block (COM on33ZCT57SPT).
c. On 33ZCT56SPT and 33ZCT57SPT thermostats,connect the remaining wire (WHITE/CLR) to theT56 terminal on the controller. Connect the otherend of the wire to the SET terminal on the sensor.
d. In the control box, install a no. 10 ring type crimplug on the shield drain wire. Install this lug underthe mounting screw of the fan coil controller.
e. On 33ZCT56SPT thermostats install a jumperbetween the two center terminals (right SEN andleft SET). See Fig. 17.
f. On 33ZCT57SPT thermostats, a separate3-conductor, shielded cable is used to connect thefan speed wiring. Connect the SPD terminal on thethermostat to the SPEED terminal on the fan coilcontroller. Use the white/clr wire. Connect theCOM terminal on the thermostat to the GND ter-minal on the fan coil controller. Use the blackwire. Connect the 10V terminal on the thermostatto the +10V terminal on the fan coil controller.Use the red wire.In the control box, install a no. 10 ring type crimplug on the fan speed wiring shield drain wire.Install this lug under the mounting screw of thefan coil controller.
Wiring the CCN Network Communication Service Jack —See Fig. 16-18. To wire the service jack, perform the following:
1. Strip back the jacket from the CCN communicationcable(s) for at least 3 inches. Strip 1/4-in. of insulationfrom each conductor. Remove the shield and separatethe drain wire from the cable. Twist together all theshield drain wires and fasten them together using anclosed end crimp lug or a wire nut. Tape off anyexposed bare wire to prevent shorting.
2. Connect the CCN + signal wire(s) (RED) toTerminal 5.
3. Connect the CCN – signal wire(s) (BLACK) toTerminal 2.
4. Connect the CCN GND signal wire(s) (WHITE/CLR)to Terminal 4.
Before wiring the CCN connection, refer to the Connect theCCN Communication Bus section on page 26, for communica-tion bus wiring and cable selection. The cable selected must beidentical to the CCN communication bus wire used for the en-tire network.
The other end of the communication bus cable must be con-nected to the remainder of the CCN communication bus. If thecable is installed as a T-tap into the bus, the cable length cannotexceed 50 ft. No more than 10 T-taps are allowed per bus. Wirethe CCN service jack of the sensor in a daisy chain arrange-ment with other equipment. Refer to the Connect to the CCNCommunication Bus section, page 26, for more details. SeeFig. 19.
WarmCool
Fig. 14 — Space Temperature Sensor(P/N 33ZCT56SPT Shown)
NOTE: Dimensions are in inches.
Fig. 15 — Space Temperature Sensor and WallMounted Humidity Sensor Mounting
15
Table 1 — Thermistor Resistance vs Temperature Values for Space Temperature Sensor, Return-Air Temperature Sensor, and Supply-Air Temperature Sensor
TEMP(C)
TEMP(F)
RESISTANCE(Ohms)
–40 –40 335,651–35 –31 242,195–30 –22 176,683–25 –13 130,243–20 –4 96,974–15 5 72,895–10 14 55,298
–5 23 42,3150 32 32,6515 41 25,395
10 50 19,90315 59 15,71420 68 12,49425 77 10,00030 86 8,05635 95 6,53040 104 5,32545 113 4,36750 122 3,60155 131 2,98560 140 2,48765 149 2,08270 158 1,752
2 3 4 5 61
SW1
SEN
BLK (GND)RED (SPT)
RED(+)WHT(GND)
BLK(-) CCN COM
SENSOR WIRING
2 3 4 5 61
SW1
SEN SET
Cool Warm
WHT(T56)
BLK (GND)RED (SPT)
RED(+)WHT(GND)
BLK(-) CCN COM
SENSOR WIRING
JUMPERTERMINALSAS SHOWN
Fig. 16 — Space Temperature Sensor Wiring(33ZCT55SPT)
Fig. 17 — Space Temperature Sensor Wiring(33ZCT56SPT)
16
SUPPLY AIR TEMPERATURE (SAT) SENSOR INSTAL-LATION — On fan coil units with heating or cooling, the SATsensor is required. The SAT must be installed in the fan coil airoutlet. The part number is 33ZCSENSAT.
The SAT sensor probe is 6 inches in length. The probe tipmust not touch the fan coil. See Fig. 20.
For fan coil installations utilizing a supply-air grille the sup-ply air temperature sensor should be fastened to the supply-airgrille in a location which will provide the best sensing of thesupply-air temperature during heating and cooling.
For fan coils using a ducted supply, the supply air tempera-ture sensor should be located in the supply duct downstream ofthe discharge of the fan coil to allow good mixing of the supplyairstream.
See Fig. 21 for mounting location.
Do not run sensor or relay wires in the same conduit or race-way with Class 1 AC service wiring. Do not abrade, cut, ornick the outer jacket of the cable. Do not pull or draw cablewith a force that may harm the physical or electrical properties.Avoid splices in any control wiring.
Perform the following steps to connect the SAT sensor tothe fan coil controller:
1. Locate the opening in the control box. Pass the sensorprobe through the hole.
2. Drill or punch a 1/2-in. hole in the fan coil unit. SeeFig. 22.
3. Use two field-supplied, self-drilling screws to securethe sensor probe to the fan coil unit.
4. Connect the sensor leads to the fan coil controller’swiring harness terminal board at the terminals labeledSAT (RED) and GND (BLK).
Perform the following steps if state or local code requiresthe use of conduit, or if your installation requires a cable lengthof more than 8 ft:
1. Secure the probe to the fan coil unit with two field-supplied self-drilling screws.
2. If you are extending cable length beyond 8 ft, use ple-num rated, 20 AWG, twisted pair wire.
3. Connect the sensor leads to the fan coil controller’swiring harness terminal board at the terminals labeledSAT (RED) and GND (BLK).
4. Neatly bundle and secure excess wire.INDOOR AIR QUALITY SENSOR INSTALLATION —The indoor air quality (IAQ) sensor accessory monitors carbondioxide levels. This information is used to monitor IAQ levels.Three types of sensors are provided. The wall sensor can beused to monitor the conditioned air space. Sensors use infraredtechnology to measure the levels of CO2 present in the air. Thewall sensor is available with or without an LCD readout to dis-play the CO2 level in ppm. See Fig. 23.
Sensor accessory descriptions and part numbers are shownin Table 2. To mount the sensor, refer to the installation instruc-tions shipped with the accessory kit.
Disconnect electrical power before wiring the fan coil con-troller. Electrical shock, personal injury, or damage to thefan coil controller can result.
3-CONDUCTORSHIELDED CABLE 3-CONDUCTOR
SHIELDED CABLE
WHITE (SPEED)
Fig. 18 — Fan Coil Thermostat Wiring (33ZCT57SPT)
LEGEND
NOTE: Do not connect white wire to SETterminal if set point adjustment is notneeded.
CCN — Carrier Comfort NetworkSW1 — SwitchSet Point — Set Point Adjust
17
Fig. 19 — Communication Bus Wiring to Fan Coil Zone Controller
WarmCool WarmCool
2 COND TWISTEDCABLE OR 3 CONDCABLE (TEMPSENSOR WIRING) (TYP)
CCN COMM BUS
SPACETEMPERATURE
SENSOR
3 COND COMM CABLE (TYP)
WarmCool WarmCool
2 COND TWISTEDCABLE OR 3 CONDCABLE (TEMPSENSOR WIRING) (TYP)
SPACETEMPERATURE
SENSOR
DISTANCE GREATERTHAN 50 FT.CCN COMM BUS
TYPICALFAN COIL UNIT
FAN COILZONECONTROLLER
50 FT. MAXIMUM
Wiring when distance between fan coil controller and space temperature sensor is 50 feet or less
Wiring when distance between fan coil controller and space temperature sensor is greater than 50 feet
18
.39
.08
FOAM GASKET
.40'' O.D.
.250 ±.01 Dia
5.5 ±.5
PLENUM RATED CABLE114'' ±6
3.00
3.90
.175 DIA x .600
APROX2 FT
SUPPLYAIR SENSOR
SUPPLYDUCT
TYPICALFAN COIL UNIT
3.00
1.50
ø0.50CLEARANCE HOLE
ENGAGEMENT HOLE FOR#10 SHEET METAL SCREW (2)
Fig. 20 — Supply Air Temperature Sensor (Part Number 33ZCSENSAT)
Fig. 21 — Supply Air Temperature Sensor Mounting Location
Fig. 22 — Supply Air Temperature Sensor Mounting
19
Table 2 — CO2 Sensor Accessories
The CO2 sensors listed in Table 2 are all factory set for arange of 0 to 2000 ppm and a linear voltage output of 0 to10 vdc. Refer to the instructions supplied with the CO2 sensorfor electrical requirements and terminal locations.
To accurately monitor the quality of the air in the condi-tioned air space, locate the sensor near a return air grille (ifpresent) so it senses the concentration of CO2 leaving thespace. The sensor should be mounted in a location to avoiddirect breath contact.
Do not mount the IAQ sensor in drafty areas such as nearsupply ducts, open windows, fans, or over heat sources. Allowat least 3 ft between the sensor and any corner. Avoid mountingthe sensor where it is influenced by the supply air; the sensorgives inaccurate readings if the supply air is blown directlyonto the sensor or if the supply air does not have a chanceto mix with the room air before it is drawn into the returnair-stream.Indoor Air Quality Sensor Wiring — To wire the sensorsafter they are mounted in the conditioned air space or outdoorlocation, see Fig. 24 and the instructions shipped with the sen-sors. For each sensor, use two 2-conductor 18 AWG twisted-pair cables (unshielded) to connect the separate isolated 24 vacpower source to the sensor and to connect the sensor to the con-trol board terminals. To connect the sensor to the control board,identify the positive (0-10 VDC) and ground (SIG COM) ter-minals on the sensor. Connect the 1-10 VDC terminal to termi-nal IAQ and connect the SIG COM terminal to terminal GND.HUMIDITY SENSOR (WALL-MOUNTED) INSTALLA-TION — The accessory space humidity sensor is installed onan interior wall to measure the relative humidity of the air with-in the occupied space. See Fig. 25.
The use of a standard 2- x 4-in. electrical box to accommo-date the wiring is recommended for installation. The sensor canbe mounted directly on the wall, if acceptable by local codes.
If the sensor is installed directly on a wall surface, install thehumidity sensor using 2 screws and 2 hollow wall anchors(field-supplied); do not overtighten screws. See Fig. 15.
The sensor must be mounted vertically on the wall. TheCarrier logo should be oriented correctly when the sensor isproperly mounted.
DO NOT mount the sensor in drafty areas such as near heat-ing or air-conditioning ducts, open windows, fans, or over heatsources such as baseboard heaters, radiators, or wall-mountedlight dimmers. Sensors mounted in those areas will produce in-accurate readings.
Avoid corner locations. Allow at least 4 ft between the sen-sor and any corner. Airflow near corners tends to be reduced,resulting in erratic sensor readings.
Sensor should be vertically mounted approximately 5 ft upfrom the floor, beside the space temperature sensor.
For distances up to 500 feet, use a 3-conductor, 18 or20 AWG cable. A CCN communication cable can be used,although the shield is not required. The shield must be removedfrom the sensor end of the cable if this cable is used. SeeFig. 26 for wiring details.
The power for the sensor is provided by the control board.The board provides 24 vdc for the sensor. No additional powersource is required.
To wire the sensor, perform the following:1. At the sensor, remove 4-in. of jacket from the cable.
Strip 1/4-in. of insulation from each conductor. Routethe cable through the wire clearance opening in thecenter of the sensor.
2. Connect the RED wire to the sensor screw terminalmarked (+).
3. Install one lead from the resistor (supplied with thesensor) and the WHITE wire, into the sensor screw ter-minal marked (–). After tightening the screw terminal,test the connection by pulling gently on the resistorlead.
4. Connect the remaining lead from the resistor to theBLACK wire and secure using a closed end type crimpconnector or wire nut.
5. Using electrical tape, insulate any exposed resistorlead to prevent shorting.
6. At the control box, remove the jacket from the cableand route the RED conductor over to the left side ofthe control board. Route the remaining conductors tothe right side of the control board.
7. Strip 1/4-in. of insulation from each conductorand equip each with a 1/4-in. female quick connectterminal.
8. Connect the RED wire to terminal 24VDC on the con-trol board.NOTE: The 24VDC terminal is used for RH sensorwiring only.
9. Connect the BLACK wire to terminal GND on thecontrol board.
10. Connect the WHITE/CLEAR wire to terminalRH on the control board.
11. Connect shield to ground (if shielded wire is used).
CO2 SENSORACCESSORY
PART NUMBERSDESCRIPTION
33ZCSENCO2 Wall Mount Sensor (with display)
33ZCT55CO2Wall Mount Sensor with 33ZCT55SPT space temperature sensor (no display)
33ZCT56CO2
Wall Mount Sensor with 33ZCT56SPT space temperature sensor and set point adjustment (no display)
Do NOT clean or touch the sensing element with chemicalsolvents; they can permanently damage the sensor.
3.25(8.3)
5.625(14.3)
1.125(2.9)
0.25(0.8)
5(12.7)
NOTE: Dimensions are in inches.Dimensions in ( ) are in centimeters.
Fig. 23 — Indoor Air Quality (CO2) Sensor (33ZCSENCO2)
20
+24V DC
OAD
24VAC
Equipment Ground
24VACDX2Valve
VoltageLine
ONFAN
HEAT2HEAT1COM
CONDSWREMOTE
CNGOVR
T56
SAT
SPT
IAQ
SPEED
+10V
GNDGND
GND
GNDGND
RH
DamperAir
Fresh
HIGH
MED
LOW
FAN AC
B
W
R
-B
GNDW
+R
24 VACDX1Valve
communicationsCCN
Not Used
communicationsCCN
LINE VOLTAGE24 VAC
SEPARATEPOWERSUPPLY
REQUIRED
J1
1
2
3
21 87
Fig. 24 — IAQ Sensor Wiring
21
Connect the Outputs — Wire the fan coil controller’soutputs (fan, staged heat, valves) as shown in the applicablewiring diagrams in Fig. 4-10.
Connect Accessories — Refer to accessory installa-tion instructions for installation procedures. Fan coil controllerwiring is shown for the following accessories:• Linkage Thermostat (Fig. 27)• Condensate Pump Switch (Fig. 28)• Fresh Air Damper (Fig. 29)• Remote Occupancy (Fig. 30)• Changeover Thermostat (Fig. 31)
Fig. 25 — Wall Mounted Relative Humidity Sensor(P/N 33AMSENRHS000)
+24V DC
OAD
24VAC
Equipment Ground
HUMIDITY SENSOR
BLACK
WHITE
RED
(If Used)Shield
-
+
499
24VACDX2Valve
VoltageLine
ONFAN
HEAT2HEAT1COM
CONDSWREMOTE
CNGOVR
T56
SAT
SPT
IAQ
SPEED
+10V
GNDGND
GND
GNDGND
RH
DamperAir
Fresh
HIGH
MED
LOW
FAN AC
B
W
R
-B
GNDW
+R
24 VACDX1Valve
communicationsCCN
Not Used
communicationsCCN
J1
1
2
3
Fig. 26 — Humidity Sensor Wiring
22
Fig. 27 — Wiring Connections (Linkage Thermostat)
23
Use two conductor shielded cable
OAD
24VAC
Equipment Ground
24VACDX2Valve
VoltageLine
ONFAN
HEAT2HEAT1COM
CONDSWREMOTE
CNGOVR
T56
SAT
SPT
+24V DC
IAQ
SPEED
+10V
GNDGND
GND
GNDGND
RH
DamperAir
Fresh
HIGH
MED
LOW
FAN AC
B
W
R
-B
GNDW
+R
24 VACDX1Valve
communicationsCCN
Not Used
communicationsCCN
10 uf, 25VDC+
Fig. 28 — Condensate Pump Switch Wiring
NOTE: To ensure that the switch operates reliably in a low voltage circuit, install afield-supplied 10 µf, 25 VDC capacitor across the switch contacts. Be sure to observepolarity.
24
OAD
24VAC
communicationsCCN
Not Used
communicationsCCN
+24V DC
Equipment Ground
24VACDX2Valve
VoltageLine
ONFAN
HEAT2HEAT1COM
CONDSWREMOTE
CNGOVR
T56
SAT
SPT
IAQ
SPEED
+10V
GNDGND
GND
GNDGND
RH
DamperAir
Fresh
HIGH
MED
LOW
FAN AC
B
W
R
-B
GNDW
+R
24 VACDX1Valve
J1
1
2
3
Fig. 29 — Fresh Air Damper Wiring
25
+24V DC
OAD
24VAC
Equipment Ground
24VACDX2Valve
VoltageLine
ONFAN
HEAT2HEAT1COM
CONDSWREMOTE
CNGOVR
T56
SAT
SPT
IAQ
SPEED
+10V
GNDGND
GND
GNDGND
RH
DamperAir
Fresh
HIGH
MED
LOW
FAN AC
B
W
R
-B
GNDW
+R
24 VACDX1Valve
communicationsCCN
Not Used
communicationsCCN
J1
1
2
3
+24V DC
OAD
24VAC
Equipment Ground
24VACDX2Valve
VoltageLine
ONFAN
HEAT2HEAT1COM
CONDSWREMOTE
CNGOVR
T56
SAT
SPT
IAQ
SPEED
+10V
GNDGND
GND
GNDGND
RH
DamperAir
Fresh
HIGH
MED
LOW
FAN AC
B
W
R
-B
GNDW
+R
24 VACDX1Valve
communicationsCCN
Not Used
communicationsCCN
CHANGEOVER
SENSOR
J1
1
2
3
Fig. 30 — Remote Occupancy Wiring
Fig. 31 — Changeover Sensor Wiring
26
Connect the CCN Communication Bus — Thefan coil controllers connect to the bus in a daisy chain arrange-ment. The fan coil controller may be installed on a primaryCCN bus or on a secondary bus from the primary CCN bus.Connecting to a secondary bus is recommended.
At any baud (9600, 19200, 38400 baud), the number of con-trollers is limited to 239 zones maximum. When Carrier link-age thermostats are used on the same bus as fan coil units, nomore than 128 fan coils and 12 linkage thermostats may be onthe same bus. Bus length may not exceed 4000 ft, with no morethan 60 total devices on any 1000-ft section. Optically isolatedRS-485 repeaters are required every 1000 ft.NOTE: Carrier thermostats operate at 9600 band.
The first fan coil controller in a network connects directly tothe bridge and the others are wired sequentially in a daisy chainfashion. Refer to Fig. 32 for an illustration of CCN Communi-cation Bus wiring.
The CCN Communication Bus may also connect to the fancoil controller space temperature sensor. Refer to the InstallSensors section for sensor wiring instructions.COMMUNICATION BUS WIRE SPECIFICATIONS —The Carrier Comfort Network (CCN) Communication Buswiring is field-supplied and field-installed. It consists ofshielded three-conductor cable with drain (ground) wire. Thecable selected must be identical to the CCN CommunicationBus wire used for the entire network. See Table 3 for recom-mended cable.
Table 3 — Recommended Cables
NOTE: Conductors and drain wire must be at least 20 AWG(American Wire Gage), stranded, and tinned copper. Individual con-ductors must be insulated with PVC, PVC/nylon, vinyl, Teflon, orpolyethylene. An aluminum/polyester 100% foil shield and an outerjacket of PVC, PVC/nylon, chrome vinyl, or Teflon with a minimumoperating temperature range of –20 C to 60 C is required.
CONNECTION TO THE COMMUNICATION BUS1. Strip the ends of the red, white, and black conductors
of the communication bus cable.2. Connect one end of the communication bus cable to
the bridge communication port labeled COMM2 (ifconnecting on a secondary bus).When connecting the communication bus cable, acolor code system for the entire network is recom-mended to simplify installation and checkout. SeeTable 4 for the recommended color code.
Table 4 — Color Code Recommendations
3. Connect the other end of the communication bus cableto the terminal block labeled CCN in the fan coil con-troller of the first air terminal. Following the colorcode in Table 4, connect the Red (+) wire to Terminal1. Connect the White (ground) wire to Terminal 2.Connect the Black (–) wire to Terminal 3.
4. Connect additional fan coil controllers in a daisy chainfashion, following the color coded wiring scheme inTable 4. Refer to Fig. 32.
NOTE: The communication bus drain wires (shield) mustbe tied together at each fan coil controller. If the communi-cation bus is entirely within one building, the resulting con-tinuous shield must be connected to ground at only onesingle point. If the communication bus cable exits from onebuilding and enters another building, connect the shields toground at a lightning suppressor in each building where thecable enters or exits (one point only).
MANUFACTURER CABLE PART NO.Alpha 2413 or 5463American A22503Belden 8772Columbia 02525
SIGNAL TYPE CCN BUS WIRECOLOR
PLUG PINNUMBER
+ Red 1Ground White 2– Black 3
CCN
1 2 3
CCN
1 2 3
CCN
1 2 3
CCN
1 2 3COMM
1 2 3
GND
1000 FT. MAXIMUM
DRAIN WIRE (TYP)
BLK (TYP)
WHT (TYP)
RED (TYP)
FCCFCCFCCFCC
BRIDGE(RECOMMENDED)
LEGEND
Fig. 32 — Communication Bus Wiring
CCN — Carrier Comfort NetworkFCC — Fan Coil Controller
27
START-UP
Use the Carrier network communication software to start upand configure the fan coil controller.
All set-up and set point configurations are factory-set andfield-adjustable.
Changes can be made using the ComfortWORKS® soft-ware, ComfortVIEW™ software, or Network Service Tool.The Network Service Tool is a portable interface device that al-lows the user to change system set-up and set points from azone sensor or terminal control module. During start-up, theCarrier software can also be used to verify communicationwith each fan coil controller.
For specific operating instructions, refer to the literatureprovided with the software.
Perform System Check-Out1. Check correctness and tightness of all power and com-
munication connections.2. At the fan coil, check fan and system controls for
proper operation.3. At the fan coil, check electrical system and connec-
tions of any optional electric reheat coil. If hot waterreheat is used, check piping and valves against jobdrawings.
4. Check to be sure the area around the fan coil is clear ofconstruction dirt and debris.
5. Check that final filters are installed in the fan coil.Dust and debris can adversely affect system operation.
6. Verify that the fan coil controller controls are properlyconnected to the CCN bus.
Initial Operation and Test — Perform the followingprocedure:
1. Apply 24 vac power to the control. 2. Connect the service tool to the phone jack service port
of the controller.3. Using the service tool, upload the controller from
address 0,1. The address may be set at this time. Makesure that Service Tool is connected to this fan coil unitonly when changing the address.
Fan, Heat, and Cool Configuration andTest — Perform the following procedure to configure andtest the fan, cool, and heat:
1. Display the Fan Coil Service Configuration screen tomake sure the proper Cool Type, Heat Type, fanspeeds, and other options are configured. See the Con-figuration section to answer questions about the indi-vidual configurations.
2. Display the Points Display table. In most cases, the fanwill start up in low speed due to the default settings. Ifthe fan did not come on, forcing the fan output to ONusing the Points Display table will cause the fan to runat low speed. Check to make sure the fan is running.
3. With the fan running at low speed, bring up the FanCoil Maintenance screen. Two points are available tochange fan speed to Medium or High. Change thespeeds by forcing the point. Make sure the fan runs atthe correct speeds. Change the points back to AUTOafter completing the test.
4. Heating and cooling operation can be tested with thefan running in the occupied mode by forcing the spacetemperature point. Force the point to a value 2 degreesabove the cooling set point to test cooling and2 degrees below the heating set point to test heating.
5. If the fan coil is on a two-pipe system, operation of thevalve for both modes can be tested by forcing the valueof the changeover sensor to above 80 F. When forcedabove 80 F, the changeover mode will change to heat.(If the value of the changeover mode was already heat,this is not necessary.) When forced below 65 F, thechangeover mode will change to cool.
CONFIGURATION
The following sections describe the computer configurationscreens which are used to configure the fan coil controller. Thescreens shown may be displayed differently when using differ-ent Carrier software.
Points Display Table — The Points Display table isused to monitor and change the fan coil controller set points.See Fig. 33.DESIRED MODE — The Desired Mode is determined by thefan coil controller and can use information from a LinkageThermostat or its local occupancy space conditions and setpoints.Desired Mode: Display Units ASCII
Default Value FAN ONLYDisplay Range OFF, OCC COOL, OCC
HEAT, FAN ONLY, UNOCCOOL, UNOCHEAT, DEHUMID
Network Access Read OnlyEQUIPMENT STATUS — The Equipment Status point pro-vides a single point display on the main status screen of allalarm conditions. If any conditions monitored in the zone con-troller indicate an alarm condition, the value of this point willchange from normal to alarm.Equipment Status: Display Units ASCII
Default Value ALARMDisplay Range ALARM, NORMALNetwork Access Read Only
CONTROLLING TEMPERATURE — The Controlling Tem-perature point displays the temperature of the device currentlybeing used by the fan coil controller to control heating andcooling outputs. This value could come from a Linkage Ther-mostat or a temperature sensor located in the conditionedspace.ControllingTemperature: Display Units degrees F (degrees C)
Default Value –40.0Display Range –40.0 to 245.0Network Access Read/Write
SPACE TEMPERATURE — This point displays the spacetemperature from the 10K thermistor located in the space.Space Temperature: Display Units degrees F (degrees C)
Default Value –40.0Display Range –40.0 to 245.0Network Access Read/Write
28
SUPPLY AIR TEMPERATURE — The Supply Air Temper-ature point displays the temperature of the air leaving the FanCoil, downstream of any cool or heat sources. Temperature ismeasured by a 10K thermistor. This sensor is required for prop-er function of the heat and cool algorithms.Supply AirTemperature: Display Units degrees F (degrees C)
Default Value 0.0Display Range –40.0 to 245.0Network Access Read/Write
FAN MODE — The Fan Mode point displays the status ofthe fan mode control.Fan Mode: Display Units ASCII
Default Value LOWDisplay Range OFF, ON, LOW,
MEDIUM, HIGHNetwork Access Read Only
COOLING CAPACITY — When cooling is enabled, thepercent of cooling being delivered is determined by the follow-ing formula for modulating (floating point) type heat:
% Output Capacity = ((SPT - SAT) / (SPT - 50 F)) * 100. The percent of cooling delivered is determined by the fol-
lowing for two-position hot water or staged electric heat:% Output Capacity = (# of active stages / Total stages) *
100.The Cooling Capacity point is used to display the current
Cooling Capacity.Cooling Capacity: Display Units % output capacity
Default Value 0Display Range 0 to 100Network Access Read Only
HEATING CAPACITY — When heat is enabled, the per-cent of heat being delivered is determined by the following for-mula for modulating (floating point) type heat:
% Output Capacity = ((SAT - SPT) / (140 F - SPT)) * 100The percent of heat delivered is determined by the follow-
ing for two-position hot water or staged electric heat:% Output Capacity = (# of active stages / Total stages) *
100The Heating Capacity point is used to display the current
Heating Capacity.Heating Capacity: Display Units % output capacity
Default Value 0Display Range 0 to 100Network Access Read Only
FILTER STATUS — The filter status point will be shown as“CLEAN” until the run time of the fan exceeds the configuredFilter Timer Hours. When the user-configured Filter TimerHours has been exceeded, the Filter Status will display“DIRTY” and a CCN alarm will be generated. Forcing thepoint to “NORMAL” will clear the alarm condition and will re-set the timer. The value of the timer is stored in EEPROM toprotect it in the event of a power failure. This is done periodi-cally every 24 hours. The filter timer function only operatesif the configured filter timer value (FLTTMR) is a non-zeronumber.Filter Status: Display Units Discrete ASCII
Default Value CleanDisplay Range Clean/DirtyNetwork Access Read/Write
CHANGEOVER MODE — The Changeover mode indi-cates the allowable operating mode for two pipe heating/cooling fan coil units. This point will display and follow thevalue of the Changeover Status after a 5-minute delay. Upon a
transition of the Changeover Status, the fan coil controller willterminate the previously active mode. This allows the watervalve to close if it was open. The Changeover Mode point willecho the value of the Changeover Status point after the termi-nation is complete. This point is NOT forcible (refer to theChangeover Status point in the maintenance table).ChangeoverMode: Display Units Discrete ASCII
Default Value HeatDisplay Range Heat/CoolNetwork Access Read Only
CONDENSATE PUMP — The Condensate Pump point isused to monitor the input from a condensate pump overflowswitch. The Fan Coil controller will generate a CCN alarmmessage when this input is on longer than a user-configuredtime. The zone controller will generate a return to normal mes-sage if the status of this point is off for more than 60 seconds.
When a condensate alarm is generated, all mechanical cool-ing will immediately stop to prevent further condensate accu-mulation, regardless of whether the space temperature set pointhas been satisfied. The condensate overflow alarm will have noaffect on the fan speed control. Mechanical cooling will resumenormal operation after the condensate alarm has returned tonormal.CondensatePump: Display Units Discrete ASCII
Default Value OffDisplay Range Off/OnNetwork Access Read/Write
REMOTE START — The Remote Start point is the status ofthe remote occupancy input. When the Remote Start point ison, and the zone controller is not controlled by a Linkage Ther-mostat, the zone controller will function in an occupied mode.When the Remote Start point is off, the zone controller will re-vert to its own occupancy schedule.Remote Start: Display Units Discrete ASCII
Default Value OffDisplay Range Off/OnNetwork Access Read/Write
AIR QUALITY — The Air Quality point displays the indoorair quality reading from a CO2 sensor (or other type of air qual-ity sensor) installed in the space. The CO2 sensor is for moni-toring and alarm purposes only. The Fan Coil controller can beconfigured to generate an alarm when the zone controller is inthe occupied mode and the CO2 level exceeds the high or lowlimit. Air Quality (ppm):Display units None shown (parts per
million implied)Default Value 0Display Range 0 to 5000Network Access Read/Write
RELATIVE HUMIDITY — The Relative Humidity point isthe space relative humidity reading from an optional space rel-ative humidity sensor. A high humidity override function willcause the zone controller to provide full cooling if the SpaceRelative Humidity (RH) is above the current High HumidityLimit. During the humidity override, the 50 F minimum supplyair temperature limit is maintained for DX type cooling. TheSpace Temperature must be above the current heating set point.If the zone controller is configured as a 2-pipe ChangeoverSystem, then the Changeover Mode must be Cooling.RelativeHumidity: Display Units % RH
Default Value 0Display Range 0 to 100Network Access Read/Write
29
OUTDOOR AIR TEMPERATURE — The Outdoor AirTemperature point is included to display the temperature of theoutdoor air. This value must be broadcast by another device onthe CCN network. If this point is receiving a valid broadcastvalue less than the DX cooling lockout value configured, thenDX cooling will be locked out.Outdoor AirTemperature: Display Units degrees F (degrees C)
Default Value 0.0Display Range –40.0 to 245.0Network Access Read/Write
VALVE/DX1 — The Valve/DX1 point provides the state ofthe Valve/DX1 triac (valve open for modulating cooling).Valve/DX1: Display Units Discrete ASCII
Default Value OffDisplay Range Off/OnNetwork Access Read/Write (see note)
NOTE: Force both cooling or heating outputs off prior to forc-ing either input on. Then force only one heating or cooling out-put on at a time.VALVE/DX2 — The Valve/DX2 point provides the state ofthe Valve/DX2 triac (valve close for modulating cooling).Valve/DX2 Display Units Discrete ASCII
Default Value OffDisplay Range Off/OnNetwork Access Read/Write (see note)
NOTE: Force both cooling or heating outputs off prior to forc-ing either input on. Then force only one heating or cooling out-put on at a time.
HEATING 1 — The Heating 1 point provides the state of theHeating 1 triac (valve open for modulating heating).Heating 1: Display Units Discrete ASCII
Default Value OffDisplay Range Off/OnNetwork Access Read/Write (see note)
NOTE: Force both cooling or heating outputs off prior to forc-ing either input on. Then force only one heating or cooling out-put on at a time.HEATING 2 — The Heating 2 point provides the state of theHeating 2 triac (valve close for modulating heating).Heating 2: Display Units Discrete ASCII
Default Value OffDisplay Range Off/OnNetwork Access Read/Write (see note)
NOTE: Force both cooling or heating outputs off prior to forc-ing either input on. Then force only one heating or cooling out-put on at a time.DAMPER OUTPUT — The Damper Output point providesthe state of the fresh air damper relay. If the fan is OFF, or theoccupancy status is Unoccupied or Biased Occupied, thedamper is closed. Otherwise, if the fan is ON and the occupan-cy status is occupied, the damper is open.Damper Output: Display Units Discrete ASCII
Default Value CloseDisplay Range Close/OpenNetwork Access Read/Write
Fig. 33 — Points Display Table
30
FAN OUTPUT — During occupied periods, the fan operationis determined by the Occupied Fan Operation configuration de-cision. If this decision is set to continuous (1), the fan will oper-ate continuously during the occupied periods and during heat-ing, cooling, and dehumidification during unoccupied periods.If it is set to automatic (0), the fan will only operate only ifheating, cooling or dehumidification is required (and heating orcooling is available in a 2-pipe changeover system). The FanOutput point displays the status of the fan.
During unoccupied periods, the fan will only operate if atleast one of the following conditions is true:• the Space Temperature exceeds the Cooling Set Point
and Cooling is available• Space Temperature falls below the Heating Set Point and
Heating is available• Space Humidity exceeds the Unoccupied High Humidity
limit and the Space Temperature is above the Heating setpoint
• Space Humidity exceeds the Unoccupied High Humiditylimit, the Space Temperature is below the Heating setpoint, the Heat Type is not None, and the unit is not con-figured for 2-pipe Changeover (0)
• the control is configured for Unoccupied Fan Cyclingand the current minute is equal to the calculated1-minute time interval.The fan stops at the end of the occupied time if the above
conditions are satisfied. A 5-minute fan off delay will continueto provide fan operation after a cooling cycle is completed andunder conditions where the fan would otherwise stop. Thisfunction improves IAQ by evaporating residual coil moisture(condensate) which contributes to bacteria growth.
The fan coil controller Unoccupied Fan Cycling option,when enabled, causes the fan to run for one minute each hourduring unoccupied times. The exact time of operation is deter-mined by the CCN address. The purpose of this mode is to pre-vent air stagnation from causing the unit to operate or not oper-ate based upon improperly sensing the space temperatureconditions.
Whenever a fan speed change is required, the zone control-ler will disable the fan output (for approximately 1 second) pri-or to changing the fan speed relays (FANSPD 1 and FANSPD2). This will allow the speed relays to be switched under a no-load condition and will also prevent excessive EMI from beinggenerated if the speed is being reduced. Once the fan speed re-lays are correctly positioned, the fan relay will be re-energized.
Following the execution of the initialization routine, the FanCoil will delay an amount of time (in seconds) equal to the re-mainder of the Level II address divided by 60, before turningthe fan on. This will allow for sequenced start-ups when morethan one Fan Coil is connected to the network. Fan Output: Display Units Discrete ASCII
Default Value OffDisplay Range Off/OnNetwork Access Read/Write
Alarm Service Configuration Table — The AlarmService Configuration Table is used to configure the alarmsused on the fan coil controller. See Fig. 34.ALARM ROUTING CONTROL — The Alarm RoutingControl decision indicates which CCN system software or de-vices will receive and process alarms sent by the Fan Coil con-troller. This decision consists of eight digits which can be set tozero or one. A setting of one indicates alarms should be sent tothis device. A setting of zero disables alarm processing for thatdevice. Currently the corresponding digits are configured for
the following devices: first digit - user interface software(ComfortWORKS®, ComfortVIEW™, etc.); second digit -Autodial Gateway or Telink; fourth digit - Alarm Printer Inter-face Module, DataLINK module; digits 3 and 5 through 8 - un-used.Alarm RoutingControl: Range 00000000 to 1111111
Default Value 11010000 RE-ALARM TIME — This decision is used to configure thenumber of minutes the fan coil controller will wait before analarm condition (which still exists) will be transmitted on thecommunications network again. Re-alarming of an alarm con-dition will continue until the condition no longer existsRe-Alarm Time: Units Minutes
Range 0 to 1440Default Value 0 (Disabled)
CONTROL TEMPERATURE HYSTERESIS — This con-figuration defines the range above the high set point and belowthe low set point the space temperature must exceed for analarm condition to exist during occupied hours.Control TemperatureHysteresis: Units delta F (delta C)
Range 1.0 to 20.0Default Value 5
SUPPLY AIR TEMPERATURE — The Supply Air Temper-ature High and Low Limit alarms are used to monitor the sup-ply air temperature. If the temperature becomes too low or toohigh, an alarm condition will exist.Supply Air TemperatureLow Limit: Units degrees F (degrees C)
Range –40.0 to 245.0Default Value 45.0
Supply Air TemperatureHigh Limit: Units degrees F (degrees C)
Range –40.0 to 245.0Default Value 150
OCCUPIED RELATIVE HUMIDITY — The Occupied Rel-ative Humidity alarm defines the allowable humidity levelsduring occupied periods. If the humidity becomes too low ortoo high, an alarm condition will exist.Occupied Relative HumidityLow Limit: Units % RH
Range 0 to 100Default Value 30
Occupied Relative HumidityHigh Limit Units % RH
Range 0 to 100Default Value 70
UNOCCUPIED RELATIVE HUMIDITY — The Unoccu-pied Relative Humidity alarm defines the allowable humiditylevels during unoccupied periods. If the humidity becomes toolow or too high, an alarm condition will exist.UnoccupiedRelative HumidityLow Limit: Units % RH
Range 0 to 100Default Value 10
UnoccupiedRelative HumidityHigh Limit: Units % RH
Range 0 to 100Default Value 90
31
INDOOR AIR QUALITY — The Indoor Air Quality alarmdefines the allowable CO2 levels during occupied periods. Ifthe CO2 levels become too low or too high during occupied pe-riods, an alarm condition will exist.Indoor Air QualityLow Limit: Units PPM (implied,
not shown)Range 0.0 to 5000.0Default Value 0.0
Indoor Air QualityHigh Limit Units PPM (implied,
not shown)Range 0.0 to 5000.0Default Value 800.0
Controller Identification Screen — The fan coilcontroller identification screen contains reference informationused to identify the zone controller. See Fig. 35.DESCRIPTION — The Description point displays the type ofdevice (fan coil controller).LOCATION — The Location point shows the location of thefan coil controller.SOFTWARE PART NUMBER — The Software Part Num-ber indicates the part number of the software being used.MODEL NUMBER — The Model Number indicates themodel number of the fan coil being used.SERIAL NUMBER — The Serial Number indicates the serialnumber of the fan coil being used.REFERENCE NUMBER — The Reference Number indi-cates the version of the software being used.
Holiday Configuration Screen — The Holiday Con-figuration screen is used by the fan coil controller to store con-figuration fields for up to twelve holidays. See. Fig. 36.START MONTH — The Start Month field is used to config-ure the month that the holiday will start. The numbers 1through 12 are used to indicate which month is specified.Start Month: Range 1 to 12
Default Value 1 (January)
START DAY — The Start Day field is used to determinewhich day the holiday will start.Start Day: Range 1 to 31
Default Value 1DURATION — The Duration field indicates how long theholiday will last (in days).Duration: Range 0 to 365
Default Value 0As an example, if a Holiday is configured for Month 2,
Day 5, Duration 2, then the Holiday will start February 5 andend February 7.
Occupancy Configuration Screen — The Occu-pancy Configuration Screen is used to configure the occupancyschedule for the fan coil controller. See Fig. 32.MANUAL OVERRIDE HOURS — The Manual OverrideHours point is used to command a timed override by enteringthe number of hours the override will be in effect. If the occu-pancy schedule is occupied when this number is downloaded,the current occupancy period will be extended by the numberof hours downloaded.
If the current occupancy period is unoccupied when the oc-cupancy override is initiated, the mode will change to occupiedfor the duration of the number of hours downloaded. If the oc-cupancy override is due to end after the start of the next occu-pancy period, the mode will transition from occupancy over-ride to occupied without becoming unoccupied and the occu-pancy override timer will be reset.
An active occupancy override or a pending occupancy over-ride may be canceled by downloading a zero to this configura-tion. Once a number other than zero has been downloaded tothis configuration, any subsequent downloads of any value oth-er than zero will be ignored by the zone controller.NOTE: Manual Overrides are not tracked by Tenant BillingReports.Manual OverrideHours: Units hours
Range 0 to 4Default Value 0
Fig. 34 — Alarm Service Configuration Table
32
OCCUPANCY SCHEDULE — For flexibility of scheduling,the occupancy programming is broken into eight separate peri-ods. For each period the schedule contains the following fields:Day of Week, Occupied From, and Occupied To.DAY OF WEEK — The Day of Week configuration consistsof eight fields corresponding to the seven days of the week anda holiday field in the following order: Monday, Tuesday,Wednesday, Thursday, Friday, Saturday Sunday, Holiday.
It is displayed as:M T W Th Fr Sa Su Hol0 0 0 0 0 0 0 0
If a 1 is configured in the corresponding place for a certainday of the week, the related “Occupied from” and “Occupiedto” times for that period will take effect on that day of theweek. If a 1 is placed in the holiday field, the related times willtake effect on a day configured as a holiday. A zero means theschedule period will not apply to that day.Day of week: Range 0 or 1
Default Values 11111111 for period 1,00000000 for the rest of the periods
OCCUPIED FROM — This field is used to configure thehour and minute, in military time, that the mode for the fan coilcontroller will switch to occupied.Occupied From: Units Hours:Minutes
Range 00:00 to 24:00(Minutes 00 to 59)
Default Value 00:00OCCUPIED TO — This field is used to configure the hourand minute, in military time, that the mode for the fan coil con-troller switches from occupied to unoccupied.Occupied To: Units Hours:Minutes
Range 00:00 to 24:00(Minutes 00 to 59)
Default Value 24:00
Set Point Screen — The Set Point screen is used to con-figure the occupied and unoccupied set points. See Fig. 38.OCCUPIED LOW — The Occupied Low set point describesthe low temperature limit of the space during Occupied mode.Occupied Low: Units degrees F (degrees C)
Range 40.0 to 90.0Default Value 70.0
OCCUPIED HIGH — The Occupied High set point describesthe high temperature limit of the space during occupied mode.This value must be at least 1.0° F above the occupied low limitor the fan coil controller will automatically adjust the value tobe 1.5 F above the occupied low limit.Occupied High: Units degrees F (degrees C)
Range 45.0 to 99.9Default Value 74.0
UNOCCUPIED LOW — The Unoccupied Low set point de-scribes the low temperature limit of the space during Unoccu-pied mode.Unoccupied Low: Units degrees F (degrees C)
Range 40.0 to 90.0Default Value 55.0
UNOCCUPIED HIGH — The Unoccupied High set point de-scribes the high temperature limit of the space during unoccu-pied mode. This value must be at least 1.0° F above the unoc-cupied low limit or the fan coil controller will automatically ad-just the value to be 1.5 F above the unoccupied low limit.Unoccupied High: Units degrees F (degrees C)
Range 45.0 to 99.9Default Value 90.0
OCCUPIED HIGH RELATIVE HUMIDITY — The Occu-pied High Relative Humidity set point describes the high hu-midity limit of the space during Occupied mode.Occupied HighRelativeHumidity: Units % RH
Range 0.0 to 100.0Default Value 100.0
UNOCCUPIED HIGH RELATIVE HUMIDITY — TheUnoccupied High Relative Humidity set point describes thehigh humidity limit of the space during Unoccupied mode.Unoccupied HighRelativeHumidity: Units % RH
Range 0.0 to 100.0Default Value 100.0
Fig. 36 — Holiday Configuration Screen
Fig. 35 — Controller Identification Screen
33
Fig. 37 — Occupancy Configuration Screen
34
Service Configuration Selection — The ServiceConfiguration Selection screen is used to configure the serviceset points of the fan coil controller. See Fig. 39.TWO-PIPE CHANGEOVER — The Two-Pipe Changeoverconfiguration defines if the Fan Coil is on a two-pipe system. Ifthe fan coil is on a two-pipe system, then it must use the samesupply and return lines for both the heating and cooling source.A changeover temperature sensor is required.Two-PipeChangeover: Units ASCII
Range Disable/EnableDefault Value Disable
FAN OPERATION — The Fan Operation configuration isused to define how the fan will operate during occupied peri-ods. The fan can operate in a continuous mode or cycle on a de-mand for heat or cool. If this decision is set to continuous (1)the fan will operate continuously during the occupied periodsand operate only during heating, cooling, and dehumidificationduring unoccupied periods. If the configuration is set to auto-matic (0), the fan will only operate only if heating, cooling ordehumidification is required (and heating or cooling isavailable).Fan Operation: Range 0 to 1
Default Value 1 (continuous)NUMBER OF FAN SPEEDS — The Number of Fan Speedsconfiguration is used to define the number of fan speeds wiredon the fan coil. If the fan is in automatic control, the fan willoperate at the lowest speed (0%) if dehumidification is re-quired. The fan will operate at the highest speed (MaximumOutput %) if any stage of electric heat is operating and the sup-ply air temperature exceeds 130 F or if any stage of DX cool-ing is operating and the supply air temperature falls below55 F. The fan speed will resume normal operation after all stag-es of electric heat are deactivated and the supply air tempera-ture falls below 100 F and if all stages of DX cooling are dis-abled. The fan will operate as a single speed fan at the speeddesired by the user if a T57 sensor has selected manual speedcontrol operation. Number ofFan Speeds (1-3): Range 0 to 3
Default Value 3AUTOMATIC FAN SPEED CONTROL — Automatic fanspeed control is based on a PID control which calculates thefan speed as a value between 0 and the Maximum Output %based upon the amount of error (P) and time (I) that the spacetemperature has deviated from set point. The zone controllerevaluates the fan speed every minute. The calculated value isdisplayed in the maintenance table. The Fan PID includes thefollowing set points: Proportional Gain, Integral Gain, Deriva-tive Gain, and Starting Value.
Proportional Gain:Range 0.0 to 40.0Default Value 10.0
Integral Gain: Range 0.0 to 10.0Default Value 3.0
Derivative Gain: Range 0.0 to 20.0Default Value 0.0
Starting Value: Units %Range 0.0 to 100.0Default Value 0.0
COOLING TYPE — The Cooling Type configuration sets thetype of cooling that the fan coil will use. Cooling type has fourselections available: 0 = None, 1 = Modulating Valve, 2 = Two-Position Valve, 3 = Direct Expansion Cooling.Cooling Type: Range 0 to 3
Default Value 0COOLING CONTROL — The fan coil controller reads thespace temperature sensor and compares the temperature tothe current high set point. If it exceeds the set point, and cool-ing is configured and available, the zone controller then calcu-lates the required supply-air temperature to satisfy the givenconditions.
A Proportional / Integral / Derivative (PID) loop is used.The modulating control function compares the submaster refer-ence from the PID loop to the supply-air temperature and thencalculates the direction and time to position the valve. TheCooling PID includes the following set points: ProportionalGain, Integral Gain, Derivative Gain, and Starting Value. Proportional Gain:Range 0.0 to 40.0
Default Value 8.0
Integral Gain: Range 0.0 to 10.0Default Value 0.3
Derivative Gain: Range 0.0 to 20.0Default Value 0.0
Starting Value: Units Degrees FRange 50.0 to 90.0Default Value 65.0
NOTE: Default values are shown for Type 1 modulatingCooling. For other cooling types, refer to the following:Variable 2 Position and 1 Stage DX 2 Stage DX
PG 24.0 12.0IG 0.0 0.5
Starting 65.0 65.0Value
Fig. 38 — Set Point Screen
35
Fig. 39 — Service Configuration Selection Screen
36
STAGED COOLING — The staging function is used for twoposition valves or DX cooling (1 or 2 stages). The stagingfunction uses the cooling submaster reference from the PIDand compares the value to the supply-air temperature to calcu-late the required number of output stages to energize.
For DX cooling, configurable Time Guard delays are pro-vided to allow for up to 2 stages of compression. Also aDX Lockout will prevent operation of the DX cooling if theoutdoor-air temperature is below this value.NOTE: Outdoor-air temperature must be provided through aCCN broadcast over the network.
Once cooling is active, a maintenance decision indicatesthat cooling is in effect. Also the cooling capacity is then calcu-lated based upon the supply-air temperature, the space temper-ature, and a minimum supply air temperature limit of 50 F.
The cooling algorithm controls the valve or stages of DXcooling to prevent the space temperature from exceeding thecurrent cooling set point (which includes any calculated offsetvalue from a T56 or T57 sensor slide bar during occupied peri-ods). Also, the cooling is controlled so that the supply-air tem-perature does not fall below 50 F when cooling is active. Number of Stages:Range 1, 2
Default Value 1The Time Guards must be set to Enable for output to a com-
pressor, and set to Disable for output to a valve or compressorunloader.Stage 1Time Guard: Range Disable/Enable
Default Value Enable
Stage 2Time Guard: Range Disable/Enable
Default Value DisableThe stage outputs will send a 24 VAC signal to the device
when turned on if these configurations are set to normal. Thedevice will be sent a 24 VAC signal in the Off state if Invertedlogic is applied.Two-PositionValve Logic Type: Range Normal/Inverted
Default Value Normal
Stage 2 DXLogic Type: Range Normal/Inverted
Default Value InvertedHEATING TYPE — The Heating Type configuration sets thetype of heating that the fan coil will use. Heating type has fourselections available: 0 = None, 1 = Modulating Valve, 2 = Two-Position Valve, 3 = Electric Heat.Heating Type: Range 0 to 3
Default Value 0HEATING CONTROL — The fan coil controller determinesif a heating demand exists in the space. The zone controllerreads the space temperature sensor and compares the tempera-ture to the current low set point (including any calculated offsetvalue from a T56 or T57 sensor) during occupied periods. If itis below the set point, and heating is configured and available,it then calculates the required supply air temperature to satisfythe given conditions. The calculated value (heating submasterreference) is compared to the actual supply-air temperature andthe output is then adjusted to satisfy conditions. A Proportional/ Integral / Derivative (PID) loop is used. The modulating con-trol function compares the submaster reference from the PIDloop to the supply-air temperature and then calculates the di-rection and time to position the valve.
The staging function is used for two-position valves or elec-tric heating (1 or 2 stages). The staging function uses the heat-ing submaster reference from the PID and compares the valueto the Supply Air Temperature to calculate the required numberof output stages to energize.
For units using floating point valves, the floating point func-tion compares the submaster reference from the PID loop to thesupply-air temperature to calculate the direction and time toposition the valve. Both outputs are not allowed to be ONsimultaneously.
The heating algorithm will control a modulating heatingvalve to maintain the space temperature at the midpoint be-tween the current low and high set points whenever dehumidi-fication is active and reheat has been enabled. During this time,a maintenance parameter will be set (reheat flag).
For two pipe changeover systems, the valve/DX output ter-minations are used for a single water valve. IF/THEN logic de-termines the routing of the control signals from the appropriateheating or cooling algorithm to the cooling valve hardware out-puts. The decision to route either heating or cooling is basedupon the Changeover Mode and the 2-pipe Changeover Sys-tem configuration equal to Yes. The actual control type outputis determined by the configured Heat Type.
The Heating PID includes the following set points: Propor-tional Gain, Integral Gain, Derivative Gain, Starting Value andFan Off Value. Proportional Gain:Range 0.0 to 40.0
Default Value 8.0
Integral Gain: Range 0.0 to 10.0Default Value 0.3
Derivative Gain: Range 0.0 to 20.0Default Value 0.0
Starting Value: Units Degrees FRange 40.0 to 90.0Default Value 80.0
Fan Off Value: Units Degrees FRange 35.0 to 120.0Default Value 55.0
NOTE: Default values are shown for Type 1 modulatingCooling. For other cooling types, refer to the following:Variable 2 Position/1 Stage Electric 2 Stage Electric
PG 24.0 40.0IG 0.0 0.5
Starting 85.0 85.0Value
To maintain a minimum temperature that may prevent a coilfreeze up on units located on an exterior wall, a configured fanoff value is used when the unit is Off. This feature is only appli-cable to modulating heating and the Changeover Mode must beHeating for two pipe changeover systems. Heat capacity willbe displayed as 0% and the Heating in Effect maintenance pa-rameter will display NO during minimum duct temperaturecontrol.
IMPORTANT: For 2-pipe systems, both heating andcooling types must be the same (for example, both set to1, modulating, or both set to 2, two-position).
37
STAGED HEATING — The Staged Heating function is usedfor two-position valves or for electric heat (1 or 2 stages). Thestaging function uses the heating submaster reference valuefrom the PID and compares it to the supply-air temperature tocalculate the required number of output stages to energize.Number of Stages:Range 1 to 2
Default Value 1
Two-PositionValve Logic: Range Normal/Inverted
Default Value NormalThe outputs will send a signal to the device when turned on
if these configurations are set to normal. The device will besent a signal in the Off state if Inverted logic is applied.
For electric heat, a Time Guard is provided for the first stageto prevent excessive cycling and premature contactor failure.Once heating is active, a maintenance decision indicates thatheating is in effect. Also the heating capacity is then calculatedbased upon the Supply Air Temperature, the Space Tempera-ture, and a maximum supply air temperature limit of 140 F.TWO POSITION DAMPER — The Two-Position Damperconfiguration should be set to 1 if the fan coil controller is usedwith a two-position outdoor air ventilation damper. The damp-er control logic determines that if the fan is OFF, or the occu-pancy status is Unoccupied or Biased Occupied, the damperwill be closed. If the fan is ON and the occupancy status is oc-cupied, the damper will be open.Two PositionDamper: Range NO/YES
Default Value NOINDOOR AIR QUALITY — The Indoor Air Quality setpoints configure the CO2 sensor for use with the zone control-ler. The voltage and reference set points allow the zone control-ler to interpret the voltage signal from the CO2 sensor. The AQLow Voltage set point defines the lowest voltage that should beread from the air quality sensor. The AQ High Voltage configu-ration defines the highest voltage which should be read fromthe air quality sensor. The Low Reference configuration de-fines the value in parts per million which correlate to the lowvoltage reading from the air quality sensor. The High Refer-ence configuration defines the value in parts per million whichcorrelate to the high voltage reading from the air quality sensor.AQ Low Voltage: Units Volts
Range 00.0 to 10.0Default Value 0.0
AQ High Voltage: Units VoltsRange 00.0 to 10.0Default Value 10.0
Low Reference: Units None (Parts Per Million implied)
Range 0 to 5000Default Value 0
High Reference: Units None (Parts Per Millionimplied)
Range 0 to 5000Default Value 2000
FILTER TIMER HOURS — The Filter Timer Hours config-uration determines when the filter status will display a “Dirty”alarm. When the Filter Timer Hours is configured to a value
other than zero and fan run time exceeds the value configured,the filter status will display “Dirty” and a CCN alarm will begenerated. Setting the configured Filter Timer Hours value tozero will disable the alarm condition. The value of the timer isstored in EEPROM to protect it in the event of a power failure.The value is stored every 24 hours. The value is multiplied by100. For example, if the Filter Timer Hours is set to 6, the“Dirty” condition would be generated after 600 hours of runtime.Filter TimerHours: Range 0 to 99
Default Value 15CONDENSATE PUMP TIMER — The Condensate PumpTimer configuration is used to set the amount of time whichmust elapse, after the Condensate pump overflow contact clos-es, before the fan will be shut down. Heating and cooling is dis-abled and an alarm message is broadcast.CondensatePump Timer: Units minutes
Range 1 to 60Default Value 10
SPACE TEMPERATURE TRIM — The Space TemperatureTrim configuration is used to calibrate the temperature displayfor a sensor that does not appear to be reading correctly.Space TemperatureTrim: Units Delta F
Range –5.0 to 5.0Default Value 0.0
SUPPLY AIR TEMPERATURE TRIM — The Supply AirTemperature Trim configuration is used to calibrate the temper-ature display for a sensor that does not appear to be readingcorrectly.Supply AirTemperatureTrim: Units Delta F
Range –5.0 to 5.0Default Value 0.0
Fan Coil Configuration — The Fan Coil Configura-tion screen allows the user to configure the functions of the fancoil. See Fig. 40.OCCUPANCY SCHEDULE NUMBER — The OccupancySchedule Number determines which Global OccupancySchedule that the zone controller will follow. A value of 64 dis-ables global occupancy from CCN and will decide Occupancyfrom its local schedule. A value of 65 and above will allow thezone controller to follow the global occupancy schedule of thenumber broadcast over CCN.Occupancy ScheduleNumber Range 64 to 99
Default Value 64GLOBAL SCHEDULE MASTER — The Global ScheduleMaster setting configures the zone controller to broadcast or re-ceive a global schedule. If set to Yes, the zone controller willact as a global schedule master and its schedule will be broad-cast to the CCN. If set to No, the zone controller will not broad-cast a global schedule and it will receive the configured occu-pancy schedule number.Global ScheduleMaster: Range No/Yes
Default Value No
38
TIMED OVERRIDE — The Timed Override decision is usedto configure a timed override duration by entering the numberof hours the override will be in effect. Pressing the overridebutton on the space temperature sensor will cause an override.
If the current occupancy period is unoccupied when the oc-cupancy override is initiated, the mode will change to occupiedfor the duration of the number of hours downloaded. If the oc-cupancy override is due to end after the start of the next occu-pancy period, the mode will transition from occupancy over-ride to occupied without becoming unoccupied, and the occu-pancy override timer will be reset.Timed OverrideHours: Range 0 to 4
Default Value 0MAXIMUM OFFSET ADJUSTMENT — The MaximumOffset Adjustment value determines to what degree the occu-pied heating and cooling set points can be adjusted by the setpoint adjustment slide bar on the space temperature sensor. Maximum OffsetAdjustment Units Delta F (Delta C)
Range 0 to 20Default Value 2
UNOCCUPIED FAN CYCLING — The Unoccupied FanCycling option, when enabled, causes the fan to run for oneminute each hour during unoccupied periods. The exact time ofoperation is determined by the CCN address. The purpose ofthis mode is to prevent air stagnation from causing the unit tooperate or not operate based upon improperly sensing the spacetemperature conditions.Unoccupied FanCycling: Range Disable/Enable
Default Value DisableDX OUTDOOR AIR LOCKOUT — The DX Lockout con-figuration will prevent operation of the DX cooling if theoutdoor-air temperature is below the configured value.DX Outdoor Units FAir Lockout: Range –40.0 to 65.0
Default Value –40.0LOCAL RH SENSOR — The Local RH Sensor configura-tion defines if a local relative humidity sensor is installed.Local RH Sensor: Range No/Yes
Default Value NoREHEAT — The reheat configuration defines if the zone con-troller will allow simultaneous heating and cooling to maintainspace temperature during the dehumidification mode.NOTE: The heating coil must be located downstream from thecooling coil if reheat is desired.Reheat: Range Disable/Enable
Default Value Disable
LINKAGE THERMOSTAT — The Linkage Thermostatstart time biases allow the installer to configure the time per de-gree the space should take to recover in the heat and coolmodes for optimum start with a Linkage Thermostat. Thesenumbers will be used to calculate the Start Bias time.Cool Start Bias: Units minutes/degree
Range 0 to 60Default Value 10
Heat Start Bias Units minutes/degreeRange 0 to 60Default Value 10
Occupancy Maintenance Table — The OccupancyMaintenance Table is used to check the occupied schedule. In-formation concerning the current occupied period is displayed.See Fig. 41.MODE — The Mode point displays the current occupiedmode for the fan coil. If the fan coil is following its own localschedule this is the result of the local schedule status. If the fancoil is configured to follow a global schedule, this point dis-plays the mode last received from a global schedule broadcast.The point will display a 0 for unoccupied and a 1 for occupied.Mode: Display Range 0 to 1
Default Value 0Network Access None
CURRENT OCCUPIED PERIOD — If the fan coil is con-figured to determine occupancy locally, the Current OccupiedPeriod point is used to display the current period determiningoccupancy.Current OccupiedPeriod: Display Range 1 to 8
Default Value 0Network Access None
OVERRIDE IN PROGRESS — The Override in Progresspoint is used to display if an occupancy override is in progress.The point will display a yes if an override is in progress, or a noif there is no override.Override InProgress: Display Range Yes/No
Default Value NoNetwork Access None
OVERRIDE DURATION — The Override Duration pointdisplays the number of minutes remaining for an occupancyoverride which is in effect. If the number of override hours wasdownloaded, the value will be converted to minutes.Override Duration:Display Units minutes
Display Range 0 to 240Default Value 0Network Access None
Fig. 40 — Fan Coil Configuration Screen
39
OCCUPIED START TIME — The Occupied Start Timepoint shows the time that the current occupied mode began. Ifthe current mode is unoccupied or the fan coil is following aglobal schedule, the value displayed by this point will remain atdefault.OccupiedStart Time: Display Range 00:00 to 23:59
Default Value 0:00Network Access None
UNOCCUPIED START TIME — The Unoccupied StartTime point shows the time that the current occupied mode willend. This will also be the beginning of the next unoccupiedmode. If the current mode is unoccupied or the fan coil is fol-lowing a global schedule, the value displayed by this point willremain at default.UnoccupiedStart Time: Display Range 00:00 to 24:00
Default Value 0:00Network Access None
NEXT OCCUPIED DAY — The Next Occupied Day pointdisplays the day of week when the next occupied period willbegin. This point is used with the Next Occupied Time so theuser will know when the next occupied period will occur. If thefan coil is following a global schedule this point will remain atdefault.Next OccupiedDay: Display Range MON, TUE, WED,
THU, FRI, SAT, SUNDefault Value No display (Blank)Network Access None
NEXT OCCUPIED TIME — The Next Occupied Time pointdisplays the time day when the next occupied period willbegin. This point is used with the Next Occupied Day so theuser will know when the next occupied period will occur. If thefan coil is following a global schedule this point will remain atdefault.NOTE: If the current mode is occupied, this point makes refer-ence to the next occupied period and, in most cases, it will notbe the same as the current occupied start time.Next OccupiedTime: Display Range 00:00 to 24:00
Default Value 0:00Network Access None
NEXT UNOCCUPIED DAY — The Next Unoccupied Daypoint displays the day of week when the next unoccupied peri-od will begin. This point is used with the Next UnoccupiedTime so the user will know when the next unoccupied periodwill occur. If the fan coil is following a global schedule thispoint will remain at default.
Next UnoccupiedDay: Display Range MON, TUE, WED,
THU, FRI, SAT, SUNDefault Value No display (Blank)Network Access None
NEXT UNOCCUPIED TIME — The Next UnoccupiedTime point displays the time day when the next unoccupiedperiod will begin. This point is used with the Next UnoccupiedDay so the user will know when the next unoccupied periodwill occur. If the fan coil is following a global schedule thispoint will remain at default.NOTE: If the current mode is occupied, this point makes refer-ence to the next unoccupied period and, in most cases, will bethe same as the unoccupied start time.Next UnoccupiedTime: Display Range 00:00 to 24:00
Default Value 0:00Network Access None
LAST UNOCCUPIED DAY — The Last Unoccupied Daypoint displays the day of week when the fan coil last changedfrom occupied to the Unoccupied mode. This point is used inconjunction with the Last Unoccupied Time to know the lasttime and day when the fan coil became unoccupied. If the fancoil is following a global schedule this point will remain atdefault.Last UnoccupiedDay: Display Range MON, TUE, WED,
THU, FRI, SAT, SUNDefault Value No display (Blank)Network Access None
LAST UNOCCUPIED TIME — The Last Unoccupied Timepoint displays the time of day when the fan coil last changedfrom occupied to the Unoccupied mode. This point is read inconjunction with the Last Unoccupied Day to know the lasttime and day when the fan coil became unoccupied. If the fancoil is following a global schedule this point will remain atdefault.Last UnoccupiedTime Display Range 00:00 to 24:00
Default Value 0:00Network Access None
Fan Coil Maintenance Table — The Fan Coil Main-tenance Table is used to service the fan coil. See Fig. 42.OCCUPIED — The Occupied point indicates if the Fan Coilis operating in the occupied mode.Occupied: Display Range No/Yes
Default Value NoNetwork Access Read Only
Fig. 41 — Occupancy Maintenance Table Screen
40
LINKAGE IN EFFECT — The Linkage in Effect point dis-plays whether an air source linkage is in effect. This means thefan coil controller is being controlled by a Linkage Thermostat.Linkage in Effect: Display Range No/Yes
Default Value NoNetwork Access Read Only
TIMED OVERRIDE IN EFFECT — The Timed Override InEffect point shows if a timed override is currently in effect.Timed Overridein Effect: Display Range No/Yes
Default Value NoNetwork Access Read Only
START BIAS TIME — The Start Bias Time, in minutes, iscalculated during the unoccupied period by the fan coil control-ler as needed to bring the temperature up or down to the setpoint under the optimum start routine. The start time bias forheat and cool are configurable. This value will be reported tothe Linkage Thermostat if it is used. It will also be used by thefan coil’s internal occupancy schedule to determine the startof the Optimal Start period. It cannot be used with GlobalScheduling.Start Bias Time: Display Units minutes
Display Range 0 to 180Default Value 0Network Access Read only
SET POINT OFFSET — The Set Point Offset point displaysthe set point offset currently requested at the 33ZCT56SPT and33ZCT57SPT room sensor with set point offset capability. theset point offset value is calculated only during occupiedperiods.Set Point Offset: Display Units Delta F (Delta C)
Display Range –20.0 to 20.0Default Value 0.0Network Access Read Only
T57 STATUS — The 33ZCT57SPT thermostat provides avoltage input to the fan coil controller in order to select fanspeed operation. The 10 vdc power and ground are provided bythe fan coil controller and the potentiometer wiper provides thevoltage signal back to the zone controller. The following is a ta-ble of values displayed by the T57 Status and acceptable volt-age ranges for each fan speed position:Display Position Voltage Minimum Voltage Maximum0 Auto 0.0 0.751 Off 2.0 4.02 Hi 4.9 6.53 Med 7.6 9.14 Lo 9.7 10.0
T57 Status: Display Range 0 to 4Default Value 4Network Access Read/Write
HEAT MASTER REFERENCE — The Heat Master Refer-ence point displays the occupied low set point, if occupied, orthe unoccupied low set point, if unoccupied. The set point off-set (if applicable) is calculated into the value.Heat MasterReference: Display Units degrees F (degrees C)
Display Range 40.0 to 90.0Default Value 70.0Network Access Read Only
HEAT SUBMASTER REFERENCE — If heat is enabled,the Heat Submaster Reference point displays the desired sup-ply air temperature calculated to heat the space. This is a resultof the heating PID loop calculation.
Heat SubmasterReference: Display Units degrees F (degrees C)
Display Range 35.0 to 140.0Default Value 0Network Access Read/Write
COOL MASTER REFERENCE — The Cool Master Refer-ence point displays the occupied high set point, if mode is oc-cupied, or the unoccupied high set point if mode is unoccupied.The set point offset (if applicable) is calculated into the value.Cool MasterReference: Display Units degrees F (degrees C)
Display Range 45.0 to 99.9Default Value 74.0Network Access Read Only
COOL SUBMASTER REFERENCE — If cooling is en-abled, the Cool Submaster Reference point displays the de-sired supply air temperature calculated to cool the space. Thisis a result of the cooling PID loop calculation.Cool SubmasterReference: Display Units degrees F (degrees C)
Display Range 40.0 to 150.0Default Value 0Network Access Read/Write
COOLING IN EFFECT — The Cooling In Effect pointshows if there is a demand for cooling in the space. The spacetemperature must be above the Occupied High or UnoccupiedHigh set point.Cooling in Effect: Display Range No/Yes
Default Value NoNetwork Access None
HEATING IN EFFECT — The Heating In Effect point showsif there is a demand for heat in the space. The space tempera-ture must be below the Occupied Low or Unoccupied Low setpoint.Heating in Effect: Display Range No/Yes
Default Value NoNetwork Access None
REHEAT IN EFFECT — The Reheat in Effect point shows ifthe fan coil is in a dehumidification mode and attempting to re-heat the dehumidified air to maintain the space temperature. IfReheat is enabled, the zone controller will fully open the cool-ing valve, if the space temperature is above the heating setpoint. Simultaneously, it will modulate the heating valve toraise or maintain the space temperature at the configured occu-pied cooling set point during dehumidification. Reheat in Effect: Display Range No/Yes
Default Value NoNetwork Access None
FAN SPEED — The Fan Speed point displays the current fanspeed (in percentage).Fan Speed: Display Units %
Display Range 0 to 100Default Value 0Network Access None
FAN SPEED MEDIUM — The Fan Speed Medium pointdisplays whether the medium fan speed is on or off.Fan SpeedMedium: Display Range Off/On
Default Value OffNetwork Access Read/Write
41
Fig. 42 — Fan Coil Maintenance Table Screen
42
FAN SPEED HIGH — The Fan Speed High point displayswhether the high fan speed is on or off.Fan Speed High: Display Range Off/On
Default Value OffNetwork Access Read/Write
CHANGEOVER TEMPERATURE — The Changeover Tem-perature point displays the value from the changeover sensor(water temperature sensor attached to the two-pipe water loop)for the fan coil. The Changeover Temperature value is forcible.It may be received through CCN from a Comfort Controllerthat monitors the water loop temperature and provides controlof boilers and/or chillers.ChangeoverTemperature: Display Units degrees F (degrees C)
Display Range –40.0 to 245.0Default Value –40.0Network Access Read/Write
CHANGEOVER STATUS — Applicable to two-pipe heating/cooling systems, the Changeover Status point determineswhether the temperature indicated by the changeover sensorwill allow the fan coil to provide heating or cooling operation.The value is determined from the changeover temperature sen-sor reading as:
<65 F = COOL>80 F = HEATbetween 65 and 80 = last active statusChangeover Status is forcible. It may be received through
CCN from a Comfort Controller which monitors and maintainsthe water loop temperature.NOTE: This value defaults to HEAT if a changeover sensorfailure occurs or for non-changeover systems.ChangeoverStatus: Display Range Heat/Cool
Default Value HeatNetwork Access Read/Write
LINKAGE THERMOSTAT — The following Linkage Ther-mostat points display the standard values received from a Link-age Thermostat (if one is being used to provide space tempera-ture, set point and occupancy information) for this fan coil.The Linkage Status point displays the status of the linkagebroadcasts from the Linkage Thermostat. A value of 0 is nor-mal communication. A value of 1 is communication failure. Avalue of 2 is not configured. A value of 3 is a change in com-munication status between supervisory and equipment.Linkage Status: Display Range 0 to 3
Default Value 2Network Access None
The Average Occupied Heat Set Point displays the Occu-pied Heat set point from the Linkage Thermostat.Average OccupiedHeat Set Point: Display Units degrees F (degrees C)
Display Range 0.0 to 99.9Default Value 0.0Network Access None
The Average Occupied Cool Set Point displays the Occu-pied Cool set point from the Linkage Thermostat.Average OccupiedCool Set Point: Display Units degrees F (degrees C)
Display Range 0.0 to 99.9Default Value 0.0Network Access None
The Average Unoccupied Heat Set Point displays the Unoc-cupied heat set point from the Linkage Thermostat.Average UnoccupiedHeat Set Point: Display Units degrees F (degrees C)
Display Range 0.0 to 99.9
Default Value 0.0Network Access None
The Average Unoccupied Cool Set Point displays the Unoc-cupied cool set point from the Linkage Thermostat.Average UnoccupiedCool Set Point: Display Units degrees F (degrees C)
Display Range 0.0 to 99.9Default Value 0.0Network Access None
The Average Zone Temperature displays the space tempera-ture from the Linkage Thermostat.Average ZoneTemperature: Display Units degrees F (degrees C)
Display Range 0.0 to 99.9Default Value 0.0Network Access None
The Average Occupied Zone Temperature displays thespace temperature from the Linkage Thermostat during occu-pied periods.Average OccupiedZone Temperature:Display Units degrees F (degrees C)
Display Range 0.0 to 99.9Default Value 0.0Network Access None
The Occupancy Status point displays a 1 if occupancy is re-ported by the Linkage Thermostat. The Occupancy Statuspoint displays a 0 if occupancy is not reported by the LinkageThermostat.OccupancyStatus: Display Range 0, 1
Default Value 0Network Access None
Water System Manager MaintenanceScreen — The Water System Manager Maintenance screenis used to provide maintenance information for the water sys-tem. See Fig. 43.COOLING LINK ACTIVE — The Cooling Link Active de-cision displays the status of communications between the fancoil and the cool source with which it is linked. If Yes dis-played, it indicates that the WSM (Water System Manager) issuccessfully transmitting information to the fan coil from alinked, configured, cooling source.
A No indicates that the fan coil is not currently communi-cating with a cooling source. The lack of communication mayindicate that the WSMs algorithms are disabled, that the LoadConfiguration Table is misconfigured, or that communicationhas failed. The fan coil controller will determine that communi-cation has failed when 5 minutes pass without any cool sourcedata being received from the WSM.
When No is displayed, the Chilled Water Temperature andCool Source Status decisions continue to display their last validdata.Cooling LinkActive? Display Units Yes/No
Default Value NoHEATING LINK ACTIVE — The Heating Link Active deci-sion displays the status of communications between the fan coiland the heat source with which it is linked. If Yes displayed, itindicates that the WSM is successfully transmitting informa-tion to the fan coil from a linked, configured, heating source.
A No indicates that the fan coil is not currently communi-cating with a heating source. The lack of communication mayindicate that the WSMs algorithms are disabled, that the LoadConfiguration Table is misconfigured, or that communicationhas failed. The fan coil controller will determine that communi-cation has failed when 5 minutes pass without any heat sourcedata being received from the WSM. When No is displayed
43
here, the Hot Water Temperature and Heat Source Status deci-sions continue to display their last valid data.Heating LinkActive? Display Units Yes/No
Default Value NoCOOL SOURCE NUMBER — The Cool Source Numberdecision displays the number of the cool source that is linked tothe fan coil by a WSM. Cool source numbers are determinedby the number of the associated Cool Source ConfigurationTable at the WSM. A 0 will be displayed in this decision if nocool source is configured for the fan coil at the WSM. Cool SourceNumber: Display Units 1 to 4 (cool source
numbers)Default Value 0 = no cool source
HEAT SOURCE NUMBER — The Heat Source Number de-cision displays the number of the heat source that is linked tothe fan coil by a WSM. Heat source numbers are determinedby the number of the associated Heat Source ConfigurationTable at the WSM. A 0 will be displayed in this decision if noheat source is configured for the fan coil at the WSM.Heat SourceNumber: Display Units 1 to 4 (heat source
numbers)Default Value 0 = no heat source
OCCUPANCY MODE — The current occupancy status ofthe fan coil is displayed in this decision. The occupancy modeis occupied when the fan coil’s occupancy time schedule is oc-cupied (or biased occupied). It is unoccupied when the fancoil’s occupancy schedule is unoccupied.OccupancyMode: Display Units 0 = unoccupied 1 =
occupied (or biased occupied)
Default Value 1
CHILLED WATER TEMPERATURE — The Chilled WaterTemperature decision displays the current leaving watertemperature at the cool source that is linked to the fan coil bythe WSM. The decision will display the value 0.0 if no coolsource is configured for the fan coil at the WSM.Chilled WaterTemperature: Display Units degrees F (degrees C)
Default Value 0.0 COOL SOURCE STATUS — This decision displays the cur-rent status of the cool source that is linked to the fan coil by theWSM. When this decision displays Off, it indicates either thatthe cool source is off, or that no cool source is configured at theWSM for the fan coil.Cool SourceStatus: Display Units On/Off
Default Value Off HOT WATER TEMPERATURE — This decision displaysthe current leaving water temperature at the heat source that islinked to the fan coil by the WSM. The decision will displaythe value 0.0 if no heat source is configured for the fan coil atthe WSM.Hot WaterTemperature: Display Units degrees F (degrees C)
Default Value 0.0 HEAT SOURCE STATUS — This decision displays the cur-rent status of the heat source that is linked to the fan coil by theWSM. When this decision displays Off, it indicates either thatthe heat source is off, or that no heat source is configured at theWSM for the fan coil.Heat SourceStatus: Display Units On/Off
Default Value Off
Fig. 43 — Water System Manager Maintenance Screen
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.PC 111 Catalog No. 533-356 Printed in U.S.A. Form 33ZC-2SI Pg 44 3-00 Replaces: NewBook 1 4
Tab 11a 13a
Copyright 2000 Carrier Corporation
