to theexpe_

Installation Instructions

NOTE: Read the entire instruction manual before startingthe installation

TABLE OF CONTENTS

SAFETY CONSIDERATIONS .................... 1

INSTALLATION ............................... 4

Step 1 - Plan for Unit Location .................. 4

Step 2 - Plan for Sequence of Unit Installation ...... 5

Step 3 - Inspect Unit ........................... 5

Step 4 - Provide Unit Support ................... 5

Step 5 - Field Fabricate Ductwork ................ 7

Step 6 - Rig and Place Unit ..................... 7

Step 7 - Convert to Horizontal & Connect Ductwork . 8

Step 8 - Install Outside Air Hood ................ 9

Step 9 - Install External Condensate Trap and Line . 10

Step 10 - Make Electrical Connections ........... 11

Step 11 - Adjust Factory-Installed Options ........ 39

Step 12 - Install Accessories ................... 39

SAFETY CONSIDERATIONS

Improper installation, adjustment, alteration, service,

maintenance, or use can cause explosion, fire, electricalshock or other conditions which may cause personal

injury or property damage. Consult a qualified installer,

service agency, or your distributor or branch forinformation or assistance. The qualified installer or

agency must use factory-authorized kits or accessorieswhen modifying this product. Refer to the individual

instructions packaged with the kits or accessories wheninstalling.

Follow all safety codes. Wear safety glasses and work

gloves. Use quenching cloths for brazing operations andhave a fire extinguisher available. Read these instructions

thoroughly and follow all warnings or cautions attached tothe unit. Consult local building codes and appropriate

national electrical codes (in USA, ANSI/NFPA70,

National Electrical Code (NEC); in Canada, CSA C22.1)for special requirements.

It is important to recognize safety information. This is the

safety-alert symbol AX. When you see this symbol on theunit and in instructions or manuals, be alert to thepotential for personal injury.

Understand the signal words DANGER, WARNING,CAUTION, and NOTE. These words are used with the

safety-alert symbol. DANGER identifies the most serious

hazards which will result in severe personal injury ordeath. WARNING signifies hazards which could result in

personal injury or death. CAUTION is used to identifyunsafe practices, which may result in minor personal

injury or product and property damage. NOTE is used tohighlight suggestions which will result in enhanced

installation, reliability, or operation.

ELECTRICALSHOCKHAZARDFailure to follow this warning could cause personalinjury or death.

Before performing service or maintenance operationson unit, always turn off main power switch to unit andinstall lockout tag. Unit may have more than onepower switch.

PERSONAL INJURY AND ENVIRONMENTALHAZARD

Failure to follow this warning could cause personalinjury or death.

Relieve pressure and recover all refrigerant beforesystem repair or final unit disposal.

Wear safety glasses and gloves when handlingrefrigerants. Keep torches and other ignition sourcesaway from refrigerants and oils.

UNIT OPERATION AND SAFETY HAZARD

Failure to follow this warning could cause personalinjury, death and/or equipment damage.

Puron ® (R-410A) refrigerant systems operate athigher pressures than standard R-22 systems. Do notuse R-22 service equipment or components on Puronrefrigerant equipment.

CUT HAZARD

Failure to follow this caution may result in personalinjury.

Sheet metal parts may have sharp edges or burrs. Use

care and wear appropriate protective clothing, safetyglasses and gloves when handling parts and servicingfurnaces.

NOTES:

I DIMENSIONS ARE IN INCHES, DIMENSIONSIN [ ] ARE IN MILLIMETERS

2 _ CENTER OF GRAVITY

3 _ DIRECTION OF AIR FLOW

3 3/4 9

[95]

CONDENSERCOIL

OPTIONAL_FACTORY

INSTALLEDCONVENIENCE C--

OUTLET'0

59 1/2[1510]

LEFT

_ !=__,,',,,,¢_\,_<_

SEE_THRU THE BASE......... CHA£

29 5/D

18 16[469] 14 11

[_12] 355 [279]

4 518

[I18]

ELECTRICAL_DISCOKNECT

LOCATION

B,

G

56[913]

40 BID[1026]

VERTICALECONOMIZER HOOD

(OPTIONAL)

IT .....

, RETURNAIR

E ALT J

CONDENSATE[751] DRAIN OPENING

TOP IN BASEPAN

t20 3/4[526]

12 5/8[321]

40 S/8[1027]

RETURNAIR

SUPPLYAIR

[159]

2 518[67]

TYPCURS

WIDTH

CONTROLSONACCESS PANEL

OPTIONALJFACTORY

INSTALLEDDISCONNECT

INDOOR BLOWER

ACCESS

88 }/8[R238]

FRONT

ESTS_ "_

/

SUPPLY _ t RETURN _ UARONETRICAIR RIGHT AIR RELIEF FLOW

FILTER ACCESS PANELIDISPOSABLE FILTERS)

INDOOR COIL

ACCESS PANEL

CONDENSERCOIL

_60 ' • E:::_" ........ E::_" bC

BACK

Vertical Connections / Economizer

!i

_50 RIB

CONDER_E_SPAIN 1

L[/68]

42 3/8_[/076]

1S 1/8[334]

t

I6 I/8 _

[157]

CONNECTION SIZES

A 1 3/8" [35] DIA FIELD POWER SUPPLY HOLE

B 2 I/2" [64] DIA POWER SUPPLY KNOCKOUT

C I B/_" [51] DIA GAUGE ACCESS PLUG

D 718" [22] DIA FIELD CONTROL WIRING HOLE

E 314" 14 NPT CONDENSATE DRAIN

G 2" [51] DIA POWERSUPPLY KNOCK OUT

11 7/8 I_[sos] I

S 1/8

[155]

Horizontal Connections / Economizer

CONDENSERCOIL

E_' oo[

THRU THE BASE CHARTTHESE HOLES REQUIRED FOR USE

CRBTMPWROO2AOl

THREADED WIRE REQ'B HOLECONDUIT SIZE USE SIZES (MAX)

W I/2" ACC 718" (222)

X 1/2" 24V 7/8" (222)

Y 1 1/411 (DO2) POWER 3/411 (444)

FOR "THRU THE BASEPAN" FACTORY OPTION,FITTINGS FOR ONLY X & Y ARE PROVIDED

Fig. 1 - Unit Dimensional Drawing -- Size 12 Unit

3

010155

STD, UNIT CORNER CORNER CORNER CORNERUNIT WEIGHT WEIGHT (A) WEIGHT (B) WEIGHT (C) WEIGHT (D) C.G.

LBS. KG. LBS. KG. LBS. KG. LBS, KG, LBS. KG. X Y Z

50HC-DS2 1025 465 333 151 290 132 187 85 215 98 41 [1041] 23 3/8 [594] 23 3/4 [605]

CORNER A

CORNER D

11 _ -- _ CORNERB

_s _,',,_S;_

CORNERC

z

I r_ r_

• ooi

Fig. 1 - Unit Dimensional Drawing -- Size 12 Unit (cont.)C10156

INSTALLATION

Jobsite Survey

Complete the following checks before installation.

1. Consult local building codes and the NEC (National

Electrical Code) ANSI/NFPA 70 for special installa-tion requirements.

2. Determine unit location (from project plans) or selectunit location.

3. Check for possible overhead obstructions which mayinterfere with unit lifting or rigging.

Step 1 -- Plan for Unit Location

Select a location for the unit and its support system (curb orother) that provides for the minimum clearances required for

safety. This includes the clearance to combustible surfaces,unit performance and service access below, around and

above unit as specified in unit drawings. See Fig. 2.

NOTE: Consider also the effect of adjacent units.

Unit may be installed directly on wood flooring or on ClassA, B, or C roof-covering material when roof curb is used.

Do not install unit in an indoor location. Do not locate air

inlets near exhaust vents or other sources of contaminatedair.

<- ,_42" (1067)

.... j.

Required bottom condensate drain connection•

Otherwise, 36" (914mm) for condensate connection•

C10145

Fig. 2 I Service Clearance Dimensional Drawing

Although unit is weatherproof, avoid locations that permit

water from higher level runoff and overhangs to fall onto theunit.

Select a unit mounting system that provides adequate heightto allow installation of condensate trap per requirements.

Refer to Step 9 -- Install External Condensate Trap and

Line - for required trap dimensions.

Roof mount --

Check building codes for weight distribution

requirements. Unit operating weight is shown in Table 1.

Table 1 - Operating Weights

60HC*D UNITS LB (KG)

Component D12

Base Unit 1025 (465)

Economizer

Vertical 80 (36)

Horizontal 105 (48)

Powered Outlet 32 (15)

Curb

14-in/356 mm 133 (60)

24-in/610 mm 174 (79)

Step 2 -- Plan for Sequence of Unit Installation

The support method used for this unit will dictate differentsequences for the steps of unit installation. For example,on curb-mounted units, some accessories must be

installed on the unit before the unit is placed on the curb.Review the following for recommended sequences forinstallation steps.

Curb-mounted installation --

Install curb

Install field-fabricated ductwork inside curb

Install accessory thru-base service connection package(affects curb and unit) (refer to accessory installationinstructions for details)

Prepare bottom condensate drain connection to suitplanned condensate line routing (refer to Step 9 fordetails)

Rig and place unitInstall outdoor air hood

Install condensate line trap and pipingMake electrical connections

Install other accessories

Pad-mounted installation --

Prepare pad and unit supports

Check and tighten the bottom condensate drainconnection plug

Rig and place unit

Convert unit to side duct connection arrangement

Install field-fabricated ductwork at unit duct openingsInstall outdoor air hood

Install condensate line trap and pipingMake electrical connections

Install other accessories

Frame-mounted installation --

Frame-mounted applications generally follow thesequence for a curb installation. Adapt as required tosuit specific installation plan.

Step 3 -- Inspect unit

Inspect unit for transportation damage. File any claimwith transportation agency.

Confirm before installation of unit that voltage, amperageand circuit protection requirements listed on unit dataplate agree with power supply provided.

Step 4 -- Provide Unit Support

Roof Curb Mount --

Accessory roof curb details and dimensions are shown inFig. 3. Assemble and install accessory roof curb inaccordance with instructions shipped with the curb.

NOTE: The gasketing of the unit to the roof curb iscritical for a watertight seal. Install gasket supplied withthe roof curb as shown in Fig. 3. Improperly appliedgasket can also result in air leaks and poor unitperformance.

Curb should be level. This is necessary for unit drain tofunction properly. Unit leveling tolerances are show inFig. 4. Refer to Accessory Roof Curb InstallationInstructions for additional information as required.

Install insulation, cant strips, roofing felt, and counterflashing as shown. Ductwork must be attached to curb andnot to the unit. The accessory thru-the-base powerpackage must be installed before the unit is"set on the roofcurb.

If electric and control wiring is to be routed through thebasepan, attach the accessory thru-the-base serviceconnections to the basepan in accordance with theaccessory installation instructions.

Slab Mount (Horizontal Units Only) --

Provide a level concrete slab that extends a minimum of 6

in. (150 mm) beyond unit cabinet. Install a gravel apron in

front of condenser coil air inlet to prevent grass andfoliage from obstructing airflow.

NOTE: Horizontal units may be installed on a roof curb

if required.

Alternate Unit Support (In Lieu of Curb or SlabMount) --

A non-combustible sleeper rail can be used in the unitcurb support area. If sleeper rails cannot be used, supportthe long sides of the unit with a minimum of 3 equallyspaced 4-in. x 4-in. (102 mm x 102 mm) pads on eachside.

A UNIT SIZEROOFCURBACCESSORY

CRRFCURBOO3A02

CRRFCURBOO4A02

1 ' - 2"

[356]2'-0"[610]

50HC*D012

NOTES=

1. ROOFCURB ACCESSORY IS SHIPPED DISASSEMBLED.2. INSULATED PANELS= 1" THK. POLYURETHANE FOAM, 1-3/4 # DENSITY.3. DIMENSIONS IN ] ARE IN MILLIMETERS.4. ROOFCURB= 18 GAGE STEEL ON 14" CURB, AND 16 GAGE STEEL ON 24" CURB.S. ATTACH DUCTWORK TO CURS. (FLANGES OF DUCT REST ON CURB)S. SERVICE CLEARANCE 4" ON EACH SIDE.

7. E_D[RECT[ON OF AIR FLOW.

CONNECTOR PKG. ACC.

CRBTMPWROO1A01CRBTMPWROO2A01

CRBTMPWROO3A01

CRBTHPWROO4AO1

B

2"-8 7/15"[827]

C

1'-10 15/16"[583]

o' 3"[76]

o' 3 _[75]

/" 3 1/4"[387]

o' o 7//B"Ell]

(80LT HEADS}

O" O 7/15"E11]_

(BOLT HEADS}

C!

i

-,qll : |

/

ii N _ SC \S _ \1\

/ "_m ,h_ _ j)/ / /

%x/ /

J RETURB AIR

{_ OPENING

" 6 ]B/18q[78B]O"

[76]

4' O 13/16 _[/240]

I_D _

,4

ii------ -- I

I

I

I 3" 3 5/8 _ I

I [1006] I

' J 'I

I

I

i ......

o' o 7/16"[11]

(BOLT HEADS}

o' o 7/1B _

(BOLT HEADS}

o" o //4"[?]

HEAD OF BOLT TO BE ONINSIDE OF FLANGE

o' [18"_/8"

D ALT DRAIN HOLE

1 3/4"[44.S]

RIGID INSULATION

(FIELD SUPPLIED)

4#

#

#

#

#

!

#

!

#

##

#

!

!

!

POWER

3/4" [19] NPT1 1/4" [31.7]

3/4" [19] NPT

1 1/4"[31.7]

NAIL

_TYP[CAL (4) SIDES

O'_16"./COUNTER FLASHING

...... "'_" (FIELD SUPPLIED}

ROBF]NG FELT'/(FIELD SUPPLIED)

CONTROL

1/2"[12.7]NPT

ACCESSORY PWR

1/2"[12.7]NPT

1=4

OPENING FOR BASEPAN

ENTRY SERVICE (SEE NOTE #8)

ROOFING MATERIAL

(FIELD

3' 415/16 ,

2 3/8 _

J I

I

I

I

" VIEW "B"(TYP. ALL CORNERS}

O' 2 1/8 _[54]

1" 8 3/!B _

[513]

([NS]DE)

SEE NOTE #2

EVB]

[12B4]

SEE V[EW "B "_

NDTE= [ [CiObIETL "Iq[CROLOK" CORNER

FASTENING DE/ICE IS ACCEPTABLE

ALTERNATE CONSTRUCTION,

Fig. 3 = Roof Curb DetailsC10157

¢

UM ALLOWABLE

'_ _ DIFFERENCE IN. (MM)B A-B ! B-C I A-C

0.5" (13) ! 1.0" (25) J 1.0" (25)

C06110

Fig. 4 - Unit Leveling Tolerances

Step 5 -- Field Fabricate Ductwork

Cabinet return-air static pressure (a negative condition)shall not exceed 0.35 in. wg (87 Pa) with economizer or

0.45 in. wg (112 Pa) without economizer.

For vertical ducted applications, secure all ducts to roof curband buikting structure. Do not connect ductwork to unit.

Insulate and weatherproof all external ductwork, joints,

and roof openings with counter flashing and mastic inaccordance with applicable codes.

Ducts passing through unconditioned spaces must be

insulated and covered with a vapor barrier.

If a plenum return is used on a vertical unit, the return

should be ducted through the roof deck to comply withapplicable fire codes.

For units with accessory electric heaters: Horizontalapplications require a minimum clearance to combustiblesurfaces of 1-in (25 mm) from duct for first 12-in (305 mm)away from unit. Vertical applications do not require aminimum clearance.

Minimum clearance is not required around ductwork.

Outlet grilles must not lie directly below unit discharge.

NOTE: A 90-degree elbow must be provided in the

ductwork to comply with UL (Underwriters Laboratories)code for use with electric heat.

PERSONAL INJURY HAZARD

Failure to follow this warning could cause personalinjury.

For vertical supply and return units, tools or partscould drop into ductwork and cause an injury. Installa 90-degree turn in the return ductwork between theunit and the conditioned space. If a 90-degree elbowcannot be installed, then a grille of sufficient strengthand density should be installed to prevent objectsfrom falling into the conditioned space. Due toelectric heater, supply duct will require 90-degreeelbow.

Step 6 -- Rig and Place Unit

Keep unit upright and do not drop. Spreader bars are not

required if top crating is left on unit. Rollers may be usedto move unit across a roof. Level by using unit frame as a

reference. See Table 1 and Fig. 5 for additional information.

Lifting holes are provided in base rails as shown in Fig. 5.Refer to rigging instructions on unit.

UNIT DAMAGE HAZARD

Failure to follow this caution may result inequipment damage.

All panels must be in place when rigging. Unit is notdesigned for handling by fork truck.

Before setting the unit onto the curb, recheck gasketing oncurb.

36"- 54"

(914-1371)

POSITION ALL SEAL STRIPS IN PLACEBEFORE INSTALLING UNIT ON ROOF CURBAS CLOSE TO THIS END AS POSSIBLE.

\

SEE DETAIL DUCT END \

"A"

DETAIL "A"

C06005

UNIT

551J*12D

MIAX WEIGHT

LB KG

1580 718

DIMIENSIONS

A B

IN IVllVl IN IVllVl

88.0 2235 31.5 775

C

IN IVllVl

49.5 1255

NOTES:

1. Dimensions in ( ) are in millimeters.

2. Hook rigging shackles through holes in base rail, as shown in detail "A." Holes in base rails are centered around theunit center of gravity. Use wooden top to prevent rigging straps from damaging unit.

Fig. 5 - Rigging Details

Positioning on Curb --

Position unit on roof curb so that the following clearances

are maintained: 1/4 in. (6.4 mm) clearance between theroof curb and the base rail inside the front and back, 0.0in. clearance between the roof curb and the base rail

inside on the duct end of the unit. This will result in the

distance between the roof curb and the base rail inside on

the condenser end of the unit being approximately equal

to Fig. 3, section C-C.

Although unit is weatherproof, guard against water fromhigher level runoff and overhangs.

After unit is in position, remove rigging skids andshipping materials.

Step 7 -- Convert to Horizontal and Connect

Ductwork (when required)

Unit is shipped in the vertical duct configuration. Unitwithout factory-installed economizer or return air smokedetector option may be field-converted to horizontalducted configuration. To convert to horizontalconfiguration, remove screws from side duct openingcovers and remove covers. Using the same screws, installcovers on vertical duct openings with the insulation-sidedown. Seals around duct openings must be tight. SeeFig. 6.

REMOVABLE HORIZONTAL

RETURN DUCT OPENING COVER

\

\\

\\ \'

_ REMOVABLE HORIZONTAL

SUPPLY DUCT OPENING COVER

C06108

Fig. 6 - Horizontal Conversion Panels

Field-supplied flanges should be attached to horizontalduct openings and all ductwork should be secured to the

flanges. Insulate and weatherproof all external ductwork,joints, and roof or building openings with counter flashing

and mastic in accordance with applicable codes.

Do not cover or obscure visibility to the unit's informativedata plate when insulating horizontal ductwork.

Step 8 1 Install Outside Air Hood

Economizer Hood Removal and Setup - FactoryOption

1. The hood is shipped in knock-down form and locatedin the return air compartment. It is attached to the

economizer using two plastic tie-wraps.

2. To gain access to the hood, remove the filter accesspanel. (See Fig. 7.)

3. Locate and cut the (2) plastic tie-wraps, being careful

to not damage any wiring. (See Fig. 8.)

4. Carefully lift the hood assembly through the filteraccess opening and assemble per the steps outlined in

Economizer Hood and Two--Position Hood on page 10.

FILTER ACCESS PANEL\

Two Position Damper Hood Removal and Setup -Factory Option

1. The hood is shipped in knock-down form and

assembled to a metal support tray using plastic stretchwrap. Located in the return air compartment, the

assembly's metal tray is attached to the basepan andalso attached to the damper using two plastic tie-wraps.

2. To gain access to the hood, remove the filter access

panel. (See Fig. 7.)

3. Locate the (2) screws holding the metal tray to thebasepan and remove. Locate and cut the (2) plastic

tie-wraps securing the assembly to the damper. (See

Fig. 9.) Be careful to not damage any wiring or cuttie-wraps securing any wiring.

4. Carefully lift the hood assembly (with metal tray) 1through the filter access opening and assemble per the

/

steps outlined in Economizer Hood and Two-Position

Hood on page 10.

parts

Cut Plastic Ties

(2) Places

INDOOR COIL ACCESS PANEL

C10146

Fig. 7 - Typical Access Panel Locations

Fig. 8 - Economizer WiringC08633

..Hood Parts

Plastic Tie Wrap

Qty (2)

Fig. 9 - Damper AssemblyC08639

Economizer Hood and Two-Position Hood--

NOTE: If the power exhaust accessory is to be installed

on the unit, the hood shipped with the unit will not beused and must be discarded. Save the aluminum filter for

use in the power exhaust hood assembly.

1. The indoor coil access panel will be used as the top of

the hood. Remove the screws along the sides and bot-tom of the indoor coil access panel. See Fig. 10.

5. Open the filter clips which are located underneath thehood top. Insert the aluminum filter into the bottomfilter rack (hood divider). Push the filter into positionpast the open filter clips. Close the filter clips to lockthe filter into place. See Fig. 12.

TOPPANEL

\\\

4\\\N

TOPPANEL

INDOOR N INDOORCOIL ", COILACCESSPANEL PANEL

C06025

Fig. 10 - Indoor Coil Access Panel Relocation

2. Swing out indoor coil access panel and insert thehood sides under the panel (hood top). Use the screwsprovided to attach the hood sides to the hood top. Usescrews provided to attach the hood sides to the unit.See Fig. 11.

TOPPANEL

INDOOR COILACCESS PANEL

LEFT

SIDE

ALUMINUMFILTER

BAROMETRICRELIEF

FILTERCLIP

C08634

Fig. 12 - Economizer Filter Installation

6. Caulk the ends of the ,joint between the unit top paneland the hood top.

7. Replace the filter access panel.

Step 9 -- Install External Condensate Trap andLine

The unit has one 3/4-in. condensate drain connection onthe end of the condensate pan and an alternate connectionon the bottom. See Fig. 13. Unit airflow configurationdoes not determine which drain connection to use. Eitherdrain connection can be used with vertical or horizontal

applications.

When using the standard side drain connection, ensure thered plug in the alternate bottom connection is tight. Dothis before setting the unit in place. The red drain pan canbe tightened with a 1/2-in. square socket drive extension.

To use the alternate bottom drain connection, remove the

red drain plug from the bottom connection (use a 1/2-in.

square socket drive extension) and install it in the sidedrain connection.

HOOD DIVIDER

C06026

Fig. 11 - Economizer Hood Construction

3. Remove the shipping tape holding the economizer ba-

rometric relief damper in place.

4. Insert the hood divider between the hood sides. See

Fig. 11 and 12. Secure hood divider with 2 screws oneach hood side. The hood divider is also used as thebottom filter rack for the aluminum filter.

ALTERNATESTANDARD DRAIN PLUGSIDE DRAIN BOTTOM DRAIN

(FACTORY-INSTALLED)

Fig. 13 - Condensate Drain Pan (Side View)C08021

10

The piping for the condensate drain and external trap canbe completed after the unit is in place. See Fig. 14.

MINIMUM PITCH

!" (25mm) PER -- BASE

10' (3rn) OF LINE_ 2" (51) MIN

\ OPEN

VENT N,._

I SEE NOTETODRAIN ,f

_'--. ROOF

CURB

DRAIN PLUG

NOTE: Trap should be deep enough to offset maximum unit static

difference. A4" (102)trap is recommended

C08022

Fig. 14 - Condensate Drain Piping Details

All units" must have an external trap for condensate

drainage. Install a trap at least 4-in. (102 mm) deep andprotect against freeze-up. If drain line is installed

downstream from the external trap, pitch the line awayfrom the unit at 1-in. per 10 f! (25 mm in 3 in) of run. Do

not use a pipe size smaller than the unit connection(-%-in.).

Step 10 -- Make Electrical Connections

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personalinjury or death.

Do not use gas piping as an electrical ground. Unit

cabinet must have an uninterrupted, unbrokenelectrical ground to minimize the possibility ofpersonal injury if an electrical fault should occur. Thisground may consist of electrical wire connected tounit ground lug in control compartment, or conduitapproved for electrical ground when installed inaccordance with NEC (National Electrical Code);ANSI/NFPA 70, latest edition (in Canada, Canadian

Electrical Code CSA [Canadian StandardsAssociation] C22.1), and local electrical codes.

NOTE: Check all factory and field electrical connections

for tightness. Field-supplied wiring shall conform with

the limitations of 63 °F (33 ° C) rise.

Field Power Supply --

If equipped with optional Powered Convenience Outlet:The power source leads to the convenience outlet's

transformer primary are not factory connected. Installer

must connect these leads according to required operationof the convenience outlet. If an always-energized

convenience outlet operation is desired, connect thesource leads to the line side of the unit-mounted

disconnect. (Check with local codes to ensure this methodis acceptable in your area.) If a de-energize via unit

disconnect switch operation of the convenience outlet isdesired, connect the source leads to the load side of theunit disconnect. On a unit without a unit-mounted

disconnect, connect the source leads to compressor

contactor C and indoor fan contactor IFC pressure lugswith unit field power leads.

All units except 208/230-v units are factory wired for the

voltage shown on the nameplate. If the 208/230-v unit isto be connected to a 208-v power suppl); the control

transformer must be rewired by moving the black wirewith the 1/4-in. female spade connector from the 230-vconnection and moving it to the 208-v 1/4-in. male

terminal on the primary side of the transformen Refer to

unit label diagram for additional information. Field power

wires will be connected line-side pressure lugs on thepower terminal block or at factory-installed optionnon-fused disconnect.

Field power wires are connected to the unit at line-sidepressure lugs on compressor contactor C and indoor fan

contactor IFC (see wiring diagram label for control boxcomponent arrangement) or at factory-installed optionnon-fused disconnect switch. Max wire size is #4 AWG

(copper only).

NOTE: TEST LEADS - Unit may be equipped with

short leads (pigtails) on the field line connection points on

contactor C or optional disconnect switch. These leads are

for factory run-test purposes only; remove and discard

before connecting field power wires to unit connection

points. Make field power connections directly to lineconnection pressure lugs only.

FIRE HAZARD

Failure to follow this warning could result inintermittent operation or performance satisfaction.

Do not connect aluminum wire between disconnect

switch and furnace. Use only copper wire.(See Fig. 15.)

ELECTRIC _]_DISCONNECT

SWITCH

[ COPPER

WIRE ONLY

QFig. 15 - Disconnect Switch and Unit

A93033

Units Without Factory-Installed Disconnect --

When installing units, provide a disconnect switch per

NEC (National Electrical Code) of adequate size.Disconnect sizing data is provided on the unit informative

11

plate. Locate on unit cabinet or within sight of the unit pernational or local codes. Do not cover unit informative

plate if mounting the disconnect on the unit cabinet.

Units with Factory-Installed Disconnect --

The factory-installed option disconnect switch is locatedin a weatherproof enclosure located under the maincontrol box. The manual switch handle is accessible

through an opening in the access panel.

All units -

All field wiring must comply with NEC and all localcodes. Size wire based on MCA (Minimum Circuit Amps)on the unit informative plate. See Fig. 16 for power wiringconnections to the unit power terminal block andequipment ground. Maximum wire size is #4 ga AWG perpole.

Provide a ground-fault and short-circuit over-currentprotection device (fuse or breaker) per NEC Article 440(or local codes). Refer to unit informative data plate forMOCP (Maximum Over-current Protection) device size.

Units Without Disconnect OptionC IFC

OO#| | |

J I -L=| |i Disconnect iI per Ii NEC i

_=r--T--_-_L1 L2 L3

208/230-3 -60460-3 -60575-3 -60

Units With Disconnect OptionFactoryWiring

I I I;I Optional iI Disconnect iI Switch iI I

and discard.

Fig. 16 - Power Wiring ConnectionsC09349

All field wiring must comply with the NEC and localrequirements.

Convenience Outlets-

ELECTRICAL OPERATION HAZARD

Failure to follow this warning could result in personalinjury or death.

Units with convenience outlet circuits may usemultiple disconnects. Check convenience outlet forpower status before opening unit for service. Locateits disconnect switch, if appropriate, and open it.Tag-out this switch, if necessary.

Two types of convenience outlets are offered on 50HC*Dmodels: Non-powered and unit-powered. Both typesprovide a 125-volt GFCI (ground-faultcircuit-interrupter) duplex receptacle rated at 15-Abehind a hinged waterproof access cover, located on theend panel of the unit. See Fig. 17.

Pwd -CO

Convenience Transformer

Outlet SGFCI

Pwd-CO

C08128

Fig. 17 - Convenience Outlet Location

Installing Weatherproof Cover -

A weatherproof while-in-use cover for thefactory-installed convenience outlets is now required by

UL standards. This cover cannot be factory-mounted due

its depth; it must be installed at unit installation. Forshipment, the convenience outlet is covered with a blank

cover plate.

The weatherproof cover kit is shipped in the unit's control

box. The kit includes the hinged cover, a backing plate

and gasket.

DISCONNECT ALL POWER TO UNIT ANDCONVENIENCE OUTLET.

Remove the blank cover plate at the convenience outlet;discard the blank cover.

Loosen the two screws at the GFCI duplex outlet, untilapproximately 1/2-in (13 mm) under screw heads are

exposed. Press the gasket over the screw heads. Slip the

backing plate over the screw heads at the keyhole slotsand align with the gasket; tighten the two screws until

snug (do not over-tighten).

12

Mount the weatherproof cover to the backing plate asshown in Fig. 18. Remove two slot fillers in the bottom of

the cover to permit service tool cords to exit the cover.Check for full closing and latching.

COVER WHILE-IN=USE RECEPTACLE

WEATHERPROOF NOT INCLUDED

BASE PLATE FORGFCI RECEPTACLE

Fig. 18 - Weatherproof Cover InstallationC09022

Non-powered type: This type requires the field

installation of a general-purpose 125-volt 15-A circuitpowered from a source elsewhere in the building. Observe

national and local codes when selecting wire size, fuse orbreaker requirements and disconnect switch size and

location. Route 125-v power supply conductors into the

bottom of the utility box containing the duplex receptacle.

Unit-powered type: A unit-mounted transformer is

factory-installed to stepdown the main power supply

voltage to the unit to l15-v at the duplex receptacle. Thisoption also includes a manual switch with fuse, located in

a utility box and mounted on a bracket behind theconvenience outlet; access is through the unit's control

box access panel. See Fig. 17.

The primary leads to the convenience outlet transformerare not factory-connected. Selection of primary power

source is a customer-option. If local codes permit, thetransformer primary leads can be connected at theline-side terminals on the unit-mounted non-fused

disconnect or HACR breaker switch; this will provideservice power to the unit when the unit disconnect switch

or HACR switch is open. Other connection methods willresult in the convenience outlet circuit being de-energized

when the unit disconnect or HACR switch is open. SeeFig. 19.

Duty Cycle: the unit-powered convenience outlet has a

duty cycle limitation. The transformer is intended toprovide power on an intermittent basis for service tools,

lamps, etc; it is not intended to provide 15-amps loadingfor continuous duty loads (such as electric heaters for

overnight use). Observe a 50% limit on circuit loading

above 8-amps (i.e., limit loads exceeding 8-amps to 30minutes of operation every hour).

SCHEMATIC - CONVENTENCE OUTLET

460V

YE LUOL

SECONDARY

1Roy

JD JA

TRAN4 _,_ _ 603V t

SECO2¢Y

D4ov, NOTES:

6kU--1 CONNECTPER

6RA--R LOCAL CODE

yED--2 FOR 240V SUPPLYEL--CONNECT 8LU TO GRAAND RED TO YEL

TRAN4

C08283

UNIT CONNECT PRIMARY TRANSFORMERVOLTAGE AS CONNECTIONS TERMINALS

208, LI: RED +YEL H1 + H3240280 L2: BLU + GRA H2 + H4

L1: RED H1460 480 Splice BLU + YEL H2 + H3

L2: GRA H4

L1: RED H1575 600 L2: GRA H2

Fig. 19 - Powered Convenience Outlet Wiring

Test the GFCI receptacle by pressing the TEST button onthe face of the receptacle to trip and open the receptacle.

Check for proper grounding wires and power line phasingif the GFCI receptacle does not trip as required. Press the

RESET button to clear the tripped condition.

Fuse on power type: The factory fuse is a Bussman"Fusetron" T-15, non-renewable screw-in (Edison base)

type plug fuse.

Using unit-mounted convenience outlets: Units withunit-mounded convenience outlet circuits will often

require that two disconnects be opened to de-energize allpower to the unit. Treat all units as electrically energized

until the convenience outlet power is also checked and

de-energization is confirmed. Observe National ElectricalCode Article 210, Branch Circuits, for use of convenienceoutlets.

Factory- Option Thru-Base Connections --

This service connection kit consists of a 1/2-in electricalbulkhead connector and a ll/4-in electrical bulkhead

connector, all factory-installed in the embossed (raised)section of the unit basepan in the condenser section. The1/2-in bulkhead connector enables the low-voltage control

wires to pass through the basepan. The ll/4-in electrical

bulkhead connector allows the high-voltage power wires

to pass through the basepan. See Fig. 20.

13

LOW VOLTAGE

CONNECTOR

HIGH VOLTAGECONDUITCONNECTOR

C08637

Fig. 20 - Thru-Base Connection Fittings

Check tightness of connector lock nuts before connectingelectrical conduits.

Field-supplied and field-installed liquidtight conduitconnectors and conduit may be attached to the connectorson the basepan. Pull correctly rated high voltage and lowvoltage through appropriate conduits. Connect the powerconduit to the internal disconnect (if unit is so equipped)or to the external disconnect (through unit side panel). Ahole must be field cut in the main control box bottom onthe left side so the 24-v control connections can be made.

Connect the control power conduit to the unit control boxat this hole.

Units without Thru-Base Connections --

1. Install power wiring conduit through side panel open-ings. Install conduit between disconnect and controlbox.

2. Install power lines to terminal connections as shownin Fig. 16.

All Units --

Voltage to compressor terminals during operation must bewithin voltage range indicated on unit nameplate. See

Table 10. On 3-phase units, voltages between phases mustbe balanced within 2% and the current within 10%. Use

the formula shown in the legend for Table 10, Note 2 (see

page 38) to determine the percent of voltage imbalance.Operation on improper line voltage or excessive phase

imbalance constitutes abuse and may cause damage toelectrical components. Such operation would invalidate

any applicable Carrier warranty.

Field Control Wiring --

The 50HC*D unit requires an external temperature control

device. This device can be a thermostat (field-supplied)or a PremierLink controller (available as factory-installed

option or as field-installed accessory, for use on a CarrierComfort Network or as a stand alone control) or the

RTU-MP Controller for Building Management Systems

using non-CCN protocols (RTU-MP is available as afactory-installed option only).

Thermostat --

Install a Carrier-approved accessory thermostat accordingto installation instructions included with the accessory.

For complete economizer function, select a two-stagecooling thermostat. Locate the thermostat accessory on a

solid wall in the conditioned space to sense average

temperature in accordance with the thermostat installationinstructions.

If the thermostat contains a logic circuit requiring 24-vpower, use a thermostat cable or equivalent single leads ofdifferent colors with minimum of seven leads. If the

thermostat does not require a 24-v source (no "C"connection required), use a thermostat cable or equivalentwith minimum of six leads. Check the thermostat

installation instructions for additional features which

might require additional conductors in the cable.

For wire runs up to 50 ft. (15 m), use no. 18 AWG(American Wire Gage) insulated wire (35°C minimum).For 50 to 75 ft. (15 to 23 m), use no. 16 AWG insulatedwire (35°C minimum). For over 75 ft. (23 m), use no. 14AWG insulated wire (35°C minimum). All wire sizeslarger than no. 18 AWG cannot be directly connected tothe thermostat and will require a junction box and spliceat the thermostat.

Unit without thru-base connection kit --

Pass the thermostat control wires through the holeprovided in the end panel (see item "D" in the view

labeled "LEFT" in Fig. 1); then feed the wires through theraceway built into the corner post to the control box. Pull

the wires over to the terminal strip on the upper-left

corner of the Central Terminal Board. (CTB) See Fig. 21.

TypicalThermostatConnections

©

G

(Note I)

©®

>(

_J

3

(Note 2) q2

Wl

Y2

Y1

Central l J7Terminal

Board

@ w2

__@ ,(2@ vl

R @ R

Note 1: Typical multbfunction marking. Follow manufacturer's configurationinstructions to select Y2.

Note 2:W2 connection not required on units with single-stage heating.

= = = Field Wiring

C09351

Fig. 21 - Typical Low-Voltage Control Connections

14

RACEWAY DISCONNECT MOUNTINGLOCATION

HOLE IN END PANEL (HIDDEN)

C08027

Fig. 22 - Field Control Wiring Raceway

NOTE: If thru-the-bottom connections accessory is

used, refer to the accessory installation instructions for

information on routing power and control wiring.

Heat Anticipator Settings i

Set heat anticipator settings at 0.14 amp for the first stage

and 0.14 amp for second-stage heating, when available.

Electric Heaters

50HC*D units may be equipped with field-installedaccessory electric heaters. The heaters are modular indesign, with heater frames holding open coil resistancewires strung through ceramic insulators, line-break limitswitches and a control contactor. One or two heater

modules may be used in a unit.

Heater modules are installed in the compartment belowthe indoor (supply) fan outlet. Access is through theindoor access panel. Heater modules slide into thecompartment on tracks along the bottom of the heateropening. See Fig. 23, Fig. 24 and Fig. 25.

Not all available heater modules may be used in everyunit. Use only those heater modules that are UL listed foruse in a specific size unit. Refer to the label on the unitcabinet for the list of approved heaters.Unit heaters are marked with Heater Model Numbers. But

heaters are ordered as and shipped in cartons marked witha corresponding heater Sales Package part number. SeeTable 2 for correlation between heater Model Number and

Sales Package part number.

NOTE: The value in position 9 of the part number differsbetween the sales package part number (value is 1) and abare heater model number (value is 0).

UNIT BLOCK-OFFPANEL

INDOOROUTDOOR ACCESSACCESS PANEL PANEL

C08133

Fig. 23 - Typical Access Panel Location (3-6 Ton)

DISCONNECT EMT OR RIGID CONDUIT SINGLE CENTER MANUAL RESET

MOUNTING (FIELD-SUPPLIED) POINT BOX POST LIMIT SWITCH

MAIN BRACKET AND BOX HEATER HEATER HEATER

CONTROL CONDUIT MOUNTING MODULE MODULE MOUNTING

BOX DRIP BOOT SCREW (LOCATION 1) (LOCATION 2) BRACKET

CONTROLWIRE TERMINAL BLOCK

C08134

Fig. 24 - Typical Component Location

Fig. 25 - Typical Module InstallationC08135

Table 2 - Heater Model Number

Bare Heater Model Number

Heater Sales Package PNOIncludes:

Bare Heater

Carton and packing materialsInstallation sheet

15

Single Point Boxes and Supplementary Fuses -- Whenthe unit MOCP device value exceeds 60-A, unit-mounted

supplementary fuses are required for each heater circuit.These fuses are included in accessory Single Point Boxes,with power distribution and fuse blocks. The single pointbox will be installed directly under the unit control box,just to the left of the partition separating the indoorsection (with electric heaters) from the outdoor section.The Single Point Box has a hinged access cover. SeeFig. 26. The Single Point Box also includes a set ofpower taps and pigtails to complete the wiring betweenthe Single Point Box and the unit's main control boxterminals. Refer to the accessory heater and Single PointBox installation instructions for details on tapconnections.

All fuses on 50HC*D units are 60-A. (Note that allheaters are qualified for use with a 60-A fuse, regardlessof actual heater ampacity, so only 60-A fuses arenecessary.)

Single Point Boxes without Fuses -- Unit heaterapplications not requiring supplemental fuses require aspecial Single Point Box without any fuses. The accessorySingle Point Boxes contain a set of power taps and pigtailsto complete the wiring between the Single Point Box andthe unit's main control box terminals. Refer to accessoryheater and Single Point Box installation instructions fordetails on tap connections.

CONTROLBOX

BUSHING

SINGLEPOINTMOUNTINGSCREWS

DRIP B(BRACKETMOUNTINGSCREWS

WIRES

FOAMBUSHING

HEATERRELAYS

HEATERMOUNTINGSCREWS

Fig. 26 - Typical Single Point InstallationC08136

Low-Voltage Control Connections -- Pull the

low-voltage control leads from the heater module(s) -

VIO and BRN (two of each if two modules are installed;identify for Module #1) - to the 4-pole terminal boardTB4 located on the heater bulkhead to the left of Heater

#1. Connect the VIO lead from Heater #1 to terminal

TB4-1. For 2 stage heating, connect the VIO lead fromHeater #2 to terminal TB4-2. For 1 stage heating with 2heater modules connect the VIO lead from both Heater #1

and #2 to terminal TB4-1. Connect both BRN leads to

terminal TB4-3. See Fig. 27.

CTB

I

CONTL ',BOARD I

"---l-- V[O

II

@ --l--oa_--I1

__BRNL ........ =1

ORN VlO BRN

',i=............ 4.......... I ........... ,

Field

Connections o--I ..... L ....

i.::j, 7- ,i i

HR1 : On Heater 1 in Position #1

HR2: On Heater 2 in Position #2 (if installed)

C08331

Fig. 27 - Accessory Electric Heater ControlConnections

16

PrcmierLink TM (Factory-Option)-

0 0 ¢.we ........SUPPLYAIRTEMP.... N_I 0=E_ °°..i:gZgl a_.o,,,,_,,.,_......""°'_='_ I

OUTDOORTEMPCNil=_ :::_1, Prem;e_k :,:,-- I8_ M ......

INDOOR A'R QUALITY ---. I-]Q'L ::_ :_ _ u_e_....... I

OUTDOOR AIR QUALITY "-. _:1 S_-_I I

DUAL MODE SENSOPdSTAT I_ -;_-_................................................-, ,. _ _ D ................. _%"%°_ IREMOTE OCCUPANCY (G) -'" t4 _ I _,,_ _ I_°_°_ I ....II I

COMP SAFETY (Y1) J_" L4il IFIRE SHUTDOWN (Y2) /_ :;7_w- i I II t*_22'_ II "[' I / [ ql-._-_-_ I

SUPPLYFANSTATUS(WI,-"'_F451 i I III.........H °I°1"1 / I =1"1I_lJ'l .g_'_" i I IlI _.li_ I I I / i i I I

NOT UbED (W2) I I • I ............................J _ _ _ ...... ,_,,. ............

ENTHALPYSTATUS(ENT,)""€'_0_ 0 _l_..:4..i_:.:l,,_ "

/ _ / t ",4 "-4 "-,,CCNILEN NAVIGATOR 4-20MA INDOOR COMPR HEAT EXHAUSTPORT PORT ECONOMIZER FAN MOTOR I & 2 LOWIHIGH RVS VALVE

OUTPUTS

Fig. 28 - PremierLink ControllerC08199

The PremierLink controller (see Fig. 28) is compatiblewith Carrier Comfort Network ® (CCN) devices. Thiscontrol is designed to allow users the access and ability tochange factory-defined settings, thus expanding thefunction of the standard unit control board. CCN service

access tools include System Pilot (TM), Touch Pilot (TM)and Service Tool. (Standard tier display tools Navigator TM

and Scrolling Marquee are not suitable for use with latestPremierLink controller (Version 2.x).)

The PremierLink control is factory-mounted in the50HC*D unit's main control box to the left of the Control

Terminal Board (CTB). Factory wiring is completedthrough harnesses connected to the CTB thermostat. Fieldconnections are made at a 16-pole terminal block (TB1)located on the bottom shelf of the unit control box in front

of the PremierLink controller. The factory-installedPremierLink control includes the supply-air temperature(SAT) sensor. The outdoor air temperature (OAT) sensor isincluded in the FIOP/accessory EconoMi$er TM 2 package.

The PremierLink controller requires the use of a Carrierelectronic thermostat or a CCN connection for timebroadcast to initiate its internal timeclock. This is

necessary for broadcast of time of day functions(occupied/unoccupied).

NOTE: PremierLink controller is shipped in Sensormode. To be used with a thermostat, the PremierLink

controller must be configured to Thermostat mode. Refer

to PremierLink Configuration instructions for OperatingMode.

Supply Air Temperature (SAT) Sensor -- OnFlOP-equipped 50HC*D unit, the unit is supplied with asupply-air temperature (SAT) sensor (33ZCSENSAT).This sensor is a tubular probe type, approx 6-inches (12.7mm) in length. It is a nominal 10-k ohm thermistor.

The SAT is factory-wired. The SAT probe is wire-tied tothe supply-air opening (on the horizontal opening end) inits shipping position. Remove the sensor for installation.Re-position the sensor in the flange of the supply-airopening or in the supply air duct (as required by localcodes). Drill or punch a 1/2-in. hole in the flange or duct.Use two field-supplied, self-drilling screws to secure thesensor probe in a horizontal orientation. See Fig. 29.

\

SENSOR _ SUPPLYAIR

m

RETURN AIR

C08200

Fig. 29 - Typical Mounting Location for Supply AirTemperature (SAT) Sensor on Small Rooftop Units

NOTE: Refer to Form 33CS-58SI for completePremierLink configuration, operating sequences andtroubleshooting information. Have a copy of this manualavailable at unit start-up.

NOTE: The sensor must be mounted in the dischargeairstream downstream of the cooling coil and any heatingdevices. Be sure the probe tip does not come in contactwith any of the unit's heater surfaces.

17

li!ii i ?t _

I!i i i H_o

:>

o

Fig. 30 - PremierLink Wiring Schematic

18

010158

Outdoor Air Temperature (OAT) Sensor I The OAT isfactory-mounted in the EconoMi$er2 (FIOP or

accessory). It is a nominal 10k ohm thermistor attached toan eyelet mounting ring.

EconoMi$er2 I The PremierLink control is used with

EconoMiSer2 (option or accessory) for outdoor airmanagement. The damper position is controlled directlyby the PremierLink control; EconoMi$er2 has no internal

logic device.

Outdoor air management functions can be enhanced with

field-installation of these accessory control devices:

Enthalpy control (outdoor air or differential sensors)

Space CO: sensor

Outdoor air CO: sensor

Refer to Table 3 for accessory part numbers.

Field connections I Field connections for accessorysensor and input devices are made at the 16-pole terminal

block (TB1) located on the control box bottom shelf infront of the PremierLink control (See Fig. 30). Some input

devices also require a 24-vac signal source; connect atCTB terminal R at "THERMOSTAT" connection strip for

this signal source. See connections figures on following

pages for field connection locations (and for continuedconnections at the PremierLink board inputs).

Table 4 provides a summary of field connections for units

equipped with Space Sensor. Table 5 provides a summaryof field connections for units equipped with SpaceThermostat.

Space Sensors - The PremierLink controller isfactory-shipped configured for Space Sensor Mode. A

Carrier T-55 or T-56 space sensor must be used. T-55space temperature sensor provides a signal of space

temperature to the PremierLink control. T-56 providessame space temperature signal plus it allows for

adjustment of space temperature setpoints from the face ofthe sensor by the occupants.

s_

©

_ .\ 5,,_ 0Ep(+)j.

_, _ _W_HL(Q_N_)L',\ BL@) t]

Wl

\ / BRN (GND& [ ',

@

4:b,

©

CCN COM

SENSOR WIRING

C08201

Fig. 31 - T-55 Space Temperature Sensor Wiring

Connect T-55 - See Fig. 31 for typical T-55 internalconnections. Connect the T-55 SEN terminals to TB1

terminals 1 and 3 (see Fig. 32).

TB1 PL

C08212

Fig. 32 - PremierLink T-55 Sensor

Connect T-56 - See Fig. 33 for T-56 internal

connections. Install a jumper between SEN and SETterminals as illustrated. Connect T-56 terminals to TB1

terminals 1, 3 and 5 (see Fig. 34).

©

©

CCN COM

SENSOR WIRING

JUMPERTERM INALSAS SHOWN

Fig. 33 - T-56 Internal Connections

C08202

<NA>

!_l'---Jumper

TB1

DTB1

%

PL

PL

DC08213

Fig. 34 - PremierLink T-56 Sensor

Connect Thermostat I A 7-wire thermostat connection

requires a 24-v power source and a common connection.Use the R and C terminals on the CTB's THERMOSTAT

connection strip for these. Connect the thermostat's Y1,Y2, W1, W2 and G terminals to PremierLink TB1 as

shown in Fig. 35.

If the 50HC*D unit is equipped with factory-installed

smoke detector(s), disconnect the factory BLU lead atTB1-6 (Y2) before connecting the thermostat. Identify the

BLU lead originating at CTB-DDC-1; disconnect atTB1-6 and tape off. Confirm that the second BLU lead atTB1-6 remains connected to PremierLink J4-8.

19

SPACE CTB

TH E R M O STAT TH ER M O STAT

02> %

G2'

PL

D CTBTH ERMOSTAT

C08119

Fig. 35 - Space Thermostat Connections

Table 3 - PremierLink Sensor Usage

OUTDOOR AIR RETURN AIROUTDOOR AIR RETURN AIR

APPLICATION TEMPERATURE TEMPERATUREENTHALPY SENSOR ENTHALPY SENSOR

SENSOR SENSOR

Differential Dry BulbTemperature with

PremierLink

(PremierLink requires4- 20 mA Actuator)

Single Enthalpy withPremierLink

(PremierLink requires4- 20mA Actuator)

Differential Enthalpywith PremierLink

(PremierLink requires4- 20mA Actuator)

Included -CRTEMPSNOO1AO0

Included -Not Used

Included -Not Used

Required -33ZCT55SPT

or equivalent

Requires -33CSENTHSW

Requires -33CSENTHSW

NOTES:

CO 2 Sensors (Optional):33ZCSENC02 - Room sensor (adjustable). Aspirator box is required for duct mounting of the sensor.33ZCASPC02 - Aspirator box used for duct-mounted CO 2 room sensor.33ZCT55C02 - Space temperature and CO2 room sensor with override.33ZCT56C02 - Space temperature and CO2 room sensor with override and setpoint.

Requires -33CSENTSEN

20

Table 4 - Space Sensor Mode

TB1 TERMINAL

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

LEGEND:T55

T56

CCN

CMPSAFE -

FILTER

FIELD CONNECTION INPUT SIGNAL

T55- SEN/T56- SEN Analog (1Okthermistor)

RMTOCC Discrete, 24VAC

T55- SEN/T56- SEN Analog (1Okthermistor)

CMPSAFE Discrete, 24VAC

T56- SET Analog (1Okthermistor)

FSD Discrete, 24VAC

LOOP- PWR Analog, 24VDC

SPS Discrete, 24VAC

IAQ-SEN Analog, 4-20mA

FILTER Discrete, 24VAC

IAQ- COM/OAQ- COM/RH- COM Analog, 4-20mA

CCN + (RED) Digital,, 5VDC

OAQ-SEN/RH-SEN Analog, 4-20mA

CCN Gnd (WriT) Digital, 5VDC

AUX OUT(Power Exhaust) (Output)Discrete 24VAC

CCN - (BLK) Digital, 5VDC

Space Temperature Sensor

Space Temperature SensorCarrier Comfort Network (communication bus)

Compressor Safety

Dirty Filter Switch

FSD - Fire Shutdown

IAQ - Indoor Air Quality (C02)

OAQ- Outdoor Air Quality (C02)

RH - Relative Humidity

SFS - Supply Fan Status

Table 5 - Thermostat Mode

TB1 TERMINAL FIELD CONNECTION INPUT SIGNAL

1 RAT SEN Analog (10k thermistor)

2 G Discrete, 24VAC

3 RAT SEN Analog (1Ok thermistor)

4 Y1 Discrete, 24VAC

5

6 Y2 Discrete, 24VAC

7 LOOP- PWR Analog, 24VDC

8 Wl Discrete, 24VAC

9 IAQ-SEN Analog, 4-20mA

10 W2 Discrete, 24VAC

11 IAQ- COM/OAQ- COM/RH-COM Analog, 4- 20mA

12 CCN + (RED) Digital, 5VDC

13 OAQ - SEN/RH - SEN Analog, 4- 20mA

14 CCN Gnd (WriT) Digital, 5VDC

15 AUX OUT (Power Exhaust) (Output) Discrete 24VAC

16 CCN - (BLK) Digital, 5VDC

LEGEND:

CCN -

G

IAQ -

OAQ -

RAT -

Carrier Comfort Network (communication bus)Thermostat Fan

Indoor Air Quality (C02)

Outdoor Air Quality (C02)

Return Air Temperature

RH - Relative Humidity

Wl - Thermostat Heat Stage 1

W2 - Thermostat Heat Stage 2

Y1 - Thermostat Cool Stage 1

Y2 - Thermostat Cool Stage 2

21

If the 50HC*D unit has an economizer system andfree-cooling operation is required, a sensor representing

Return Air Temperature must also be connected(field-supplied and installed). This sensor may be a T-55

Space Sensor (see Fig. 31) installed in the space or in thereturn duct, or it may be sensor PNO 33ZCSENSAT,installed in the return duct. Connect this sensor to TBI-1

and TB1-3 per Fig. 32.

Configure the unit for Thermostat Mode I Connect to theCCN bus using a CCN service tool and navigate toPremierLink Configuration screen for Operating Mode.Default setting is Sensor Mode (value 1). Change thevalue to 0 to reconfigure the controller for ThermostatMode.

When the PremierLink is configured for ThermostatMode, these functions are not available: Fire Shutdown(FSD), Remote Occupied (RMTOCC), Compressor Safety(CMPSAFE), Supply Fan Status (SFS), and Filter PressureSwitch (FILTER).

Economizer controls i

Outdoor Air Enthalpy Control (PNO 33CSENTHSW) -

The enthalpy control (33CSENTHSW) is available as afield-installed accessory to be used with the EconoMi$er2damper system. The outdoor air enthalpy sensor is part ofthe enthalpy control. (The separate field-installedaccessory return air enthalpy sensor (33CSENTSEN) isrequired for differential enthalpy control. See Fig. 36.)

Locate the enthalpy control in the economizer next to the

Actuator Motor. Locate two GRA leads in the factory

harness and connect the gray lead labeled "ESL" to theterminal labeled "LOW". See Fig. 36. Connect the

enthalpy control power input terminals to economizeractuator power leads RED (connect to 24V) and BLK

(connect to GND).

EnthalpySwitch

= RED '_ECONO

BLK ,JMOTOR

GRA_ E__ CTBECON

m Factory Wiring HarnessC09026

Fig. 36 - Enthalpy Switch (33CSENTHSW) Connections

The outdoor enthalpy changeover setpoint is set at theenthalpy controller.

Differential Enthalpy Control I Differential enthalpycontrol is provided by sensing and comparing the outside

air and return air enthalpy conditions. Install the outdoor

air enthalpy control as described above. Add and install areturn air enthalpy sensor.

- 4-20Main

+ VDCOut

+ 24-36VDC In

- 4-20 MainOut

|24V ? RED --'_ECONO

GND T| BLK ,JMOTOR

LOW 1- GRA _

C09027

Fig. 37 - Outside and Return Air Enthalpy SensorWiring

To wire the return air enthalpy sensor, perform thefollowing:

1. Use a 2-conductor, 18 or 20 AWG, twisted pair cableto connect the return air enthalpy sensor to the enthal-

py controller.

2. Connect the field-supplied RED wire to (+) spadeconnector on the return air enthalpy sensor and the

(+) terminal on the enthalpy controller. Connect the

BLK wire to (-) spade connector on the return air en-thalpy sensor and the (-) terminal on the enthalpycontroller.

Indoor Air Quality (CO2 sensor) I The indoor air qualitysensor accessory monitors space carbon dioxide (CO2)levels. This information is used to monitor IAQ levels.

Several types of sensors are available, for wall mountingin the space or in return duct, with and without LCDdisplay, and in combination with space temperaturesensors. Sensors use infrared technology to measure thelevels of CO2 present in the space air.

The CO2 sensors are all factory set for a range of 0 to2000 ppm and a linear mA output of 4 to 20. Refer to theinstructions supplied with the CO2 sensor for electricalrequirements and terminal locations. See Fig. 38 fortypical CO2 sensor wiring schematic.

22

0

H

2 1 O 87654321J3 J4

Q0q0VDC® SIG COM® 4-20mA

NC ] ALARMCOM_, RELAYNO J CONTACTS

O

C08635

Fig. 38 - Indoor/Outdoor Air Quality (CO2) Sensor

(33ZCSENCO2) - Typical Wiring Diagram

To accurately monitor the quality of the air in the

conditioned air space, locate the sensor near a return-air

grille (if present) so it senses the concentration of CO2leaving the space. The sensor should be mounted in alocation to avoid direct breath contact.

Do not mount the IAQ sensor in drafty areas such as nearsupply ducts, open windows, fans, or over heat sources.

Allow at least 3 ft (0.9 m) between the sensor and anycorner. Avoid mounting the sensor where it is influenced

by the supply air; the sensor gives inaccurate readings ifthe supply air is blown directly onto the sensor or if the

supply air does not have a chance to mix with the room airbefore it is drawn into the return airstream.

Wiring the Indoor Air Quality Sensor --

For each sensor, use two 2-conductor 18 AWG (American

Wire Gage) twisted-pair cables (unshielded) to connectthe separate isolated 24 vac power source to the sensorand to connect the sensor to the control board terminals.

To connect the sensor to the control, identify the positive(4 to 20 mA) and ground (SIG COM) terminals on the

sensor. See Fig. 38. Connect the 4-20 mA terminal toterminal TB1-9 and connect the SIG COM terminal to

terminal TBI-ll. See Fig. 39.

IAQ SensorTB1 PL

TB1<gg> []

24 VAC

C08636

Fig. 39 - Indoor CO2 Sensor (33ZCSENCO2)Connections

Refer to Form 33CS-58SI, PremierLink Installation,Start-up, and Configuration Instructions, for detailedconfiguration information

Outdoor Air Quality Sensor (PNO 33ZCSENCO2 plusweatherproof enclosure) -- The outdoor air CO2 sensor isdesigned to monitor carbon dioxide (CO2) levels in theoutside ventilation air and interface with the ventilation

damper in an HVAC system. The OAQ sensor is packagedwith an outdoor cover. See Fig. 40. The outdoor air CO2sensor must be located in the economizer outside air hood.

61t2"

_1-- 41/4" ......................t_

_4_---- 33/4" --_b,,]

© @

@@

@

COVER REMOVED

--,--

7 u

...... 3.5" ........

OC

OOO

SIDE VIEW

C07135

Fig. 40 - Outdoor Air Quality Sensor Cover

Wiring the Outdoor Air CO2 Sensor -- A dedicated powersupply is required for this sensor. A two-wire cable isrequired to wire the dedicated power supply for the sensor.The two wires should be connected to the power supplyand terminals 1 and 2.

To connect the sensor to the control, identify the positive(4 to 20 mA) and ground (SIG COM) terminals on the

OAQ sensor. See Fig. 38. Connect the 4 to 20 mAterminal to the TB1-13 terminal of the 50HC*D. Connectthe SIG COM terminal to the TBI-ll terminal of the

50HC*D. See Fig. 41.

OAQ Sensor/RH SensorTB1 PL

TB1

@ Fq24 VAC

C08275

Fig. 41 - Outdoor CO 2 Sensor Connections

Smoke Detector/Fire Shutdown (FSD) -- This function is

available only when PremierLink is configured for(Space) Sensor Mode. The unit is factory-wired for

PremierLink FSD operation when PremierLink is

factory-installed.

23

On 50HC*D units equipped with factory-installed SmokeDetector(s), the smoke detector controller implements the

unit shutdown through its NC contact set connected to theunit's CTB input. The FSD function is initiated via thesmoke detector's Alarm NO contact set. The PremierLink

communicates the smoke detector's tripped status to the

CCN building control. See Fig. 30, the PremierLinkwiring schematic.

Filter Status Switch I This function is available onlywhen PremierLink is configured for (Space) Sensor Mode.

PremierLink control can monitor return filter status in two

ways: By monitoring a field-supplied/installed filter

pressure switch or via supply fan runtime hours.

Using switch input: Install the dirty filter pressure switchaccording to switch manufacturer's instructions, to

measure pressure drop across the unit's return filters.Connect one side of the switch's NO contact set to CTB's

THERMOSTAT-R terminal. Connect the other side of the

NO contact set to TBI-10. Setpoint for Dirty Filter is setat the switch. See Fig. 42.

Filter Switch (NO, close on rising pressure (high drop))

CTBThermostat

° TB1 PL

[] @C08216

Fig. 42 - PremierLink Filter Switch Connection

When the filter switch's NO contact set closes as filter

pressure drop increases (indicating dirt-laden filters), the

input signal to PremierLink causes the filter status point toread "DIRTY".

Using Filter Timer Hours: Refer to Form 33CS-58SI for

instructions on using the PremierLink Configurationscreens and on unit alarm sequence.

Supply Fan Status Switch I The PremierLink control can

monitor supply fan operation through afield-supplied/installed differential pressure switch. This

sequence will prevent (or interrupt) operation of unitcooling, heating and economizer functions until the

pressure switch contacts are closed indicating propersupply fan operation.

Install the differential pressure switch in the supply fan

section according to switch manufacturer's instructions.Arrange the switch contact to be open on no flow and to

close as pressure rises indicating fan operation.

Connect one side of the switch's NO contact set to CTB'sTHERMOSTAT-R terminal. Connect the other side of the

NO contact set to TB1-8. Setpoint for Supply Fan Statusis set at the switch. See Fig. 43.

Fan (Pressure) Switch (NO, close on rise in pressure)CTB

Thermostat

o []

L_o--- TB1--0- []

C08118

Fig. 43 - PremierLink Wiring Fan Pressure SwitchConnection

Remote Occupied Switch I The PremierLink controlpermits a remote timeclock to override the control's

on-board occupancy schedule and place the unit intoOccupied mode. This function may also provide a "Door

Switch" time delay function that will terminate cooling

and heating functions after a 2-20 minute delay.

Connect one side of the NO contact set on the timeclockto CTB's THERMOSTAT-R terminal. Connect the other

side of the timeclock contact to the unit's TB1-2 terminal.

Remote Occupied CTBThermostat

TB1 PLTime Clock C[_ -O- [] @

C08214

Fig. 44 - PremierLink Wiring Remote Occupied

Refer to Form 33CS-58SI for additional information on

configuring the PremierLink control for Door Switchtimer function.

Power Exhaust (output) - Connect the accessory PowerExhaust contactor coils(s) per Fig. 45.

Space Relative Humidity Sensor I The RH sensor is notused with 50HC*D models at this time.

Power ExhaustTB1 PL

TAN tN <2DCTB

THERMOSTAT

GRA {_

C08120

Fig. 45 - PremierLink Power Exhaust OutputConnection

CCN Communication Bus I The PremierLink controller

connects to the bus in a daisy chain arrangement.Negative pins on each component must be connected to

respective negative pins, and likewise, positive pins oneach component must be connected to respective positive

pins. The controller signal pins must be wired to the signalground pins. Wiring connections for CCN must be made

at the 3-pin plug.

24

At any baud (9600, 19200, 38400 baud), the number ofcontrollers is limited to 239 devices maximum. Bus length

may not exceed 4000 It, with no more than 60 totaldevices on any 1000-ft section. Optically isolated RS-485

repeaters are required every 1000 ft.

NOTE: Carrier device default is 9600 band.

COMMUNICATION BUS WIRE SPECIFICATIONS --

The CCN Communication Bus wiring is field-suppliedand field-installed. It consists of shielded 3-conductor

cable with drain (ground) wire. The cable selected mustbe identical to the CCN Communication Bus wire used for

the entire network.

See Table 6 for recommended cable.

Table 6 - Recommended Cables

MANUFACTURER CABLE PART NO.

Alpha 2413 or 5463

American A22503

Belden 8772

Columbia 02525

NOTE: Conductors and drain wire must be at least 20

AWG, stranded, and tinned copper. Individual conductors

must be insulated with PVC, PVC/nylon, vinyl, Teflon, or

polyethylene. An aluminum/polyester 100% foil shield

and an outer jacket of PVC, PVC/nylon, chrome vinyl, or

Teflon with a minimum operating temperature range of

-20°C to 60°C is required. Do not run communication

wire in the same conduit as or next to any AC voltage

wiring.

The communication bus shields must be tied together ateach system element. If the communication bus is entirely

within one building, the resulting continuous shield must

be connected to ground at only one single point. If thecommunication bus cable exits from one building and

enters another building, the shields must be connected tothe grounds at a lightning suppressor in each building (one

point only).

Connecting CCN bus:

NOTE: When connecting the communication bus cable,

a color code system for the entire network is

recommended to simplify installation and checkout. SeeTable 7 for the recommended color code.

Table 7 - Color Code Recommendations

CCN BUS WIRE CCN PLUG PINSIGNAL TYPE

COLOR NUMBER

+ Red 1

Ground White 2

- Black 3

Connect the CCN (+) lead (typically RED) to the unit's I

TBI-12 terminal. Connect the CCN (ground) lead

/

(typically WHT) to the unit's TBI-14 terminal. Connect

the CCN (-) lead (typically BLK) to the unit's TBI-16

terminal. See Fig. 46.

CCN Bus

TB1 PL

+ (RED) "D

TB1

GND (WHT) '[_m

TB1

C08276

Fig. 46 I PremierLink CCN Bus Connections

25

RTU-MP control system

The RTU-MP controller, see Fig. 47, provides expandedstand-alone operation of the HVAC system plus

connection and control through communication with

several Building Automation Systems (BAS) throughpopular third-party network systems. The available

network systems are BACnet MP/TR Modbus andJohnson J2. Communication with LonWorks is also

possible by adding an accessory interface card to theRTU-MP. Selection of the communication protocol andbaud rate are made at on-board DIP switches.

The RTU-MP control is factory-mounted in the 50HC*Dunit's main control box, to the left of the CTB. See

Fig. 48. Factory wiring is completed through harnessesconnected to the CTB. Field connections for RTU-MP

sensors will be made at the Phoenix connectors on the

RTU-MP board. The factory-installed RTU-MP control

includes the supply-air temperature (SAT) sensor. Theoutdoor air temperature (OAT) sensor is included in the

FIOP/accessory EconoMi$er2 package.

Refer to Table 8, RTU-MP Controller Inputs and Outputsfor locations of all connections to the RTU-MP board.

J4 :m (AO-1)9 _ o-10VDC

= J3

J5

DO-6 (H)(Humidistat)

DO-;' (Spare)

111041(PE)Power Exhaust)

Jll

J14

Protocol Selector *Remove InpuL10 (T-55 A_y) BACnet

both for O-5V InpuLtl (T_S Accy) or NetComm

Fig. 47 - RTU-MP Multi-Protocol Control Board

C07129

CTB

RTU-MP

FlOP

RTU-MP Board

I I 71

I .....I I ll -Jl 'll Jr q

Fig. 48 - 50HC*D Control Box Component Locations

26

C10159

t_

>*o

>o

coo

#

o

<

_IYI T0_ _i_ /!i iiii /

!ii i ttI!i i iI !1 /Wi i nLi_y_ Ud H

=

8

o

L

=

I_@L

o

_ I_F

¢€

Fig. 49 - RTU-MP System Control Wiring Diagram

27

C10160

Table 8 - RTU-MP Controller Inputs and Outputs

POINT NAME BACnet OBJECT TYPE OF I/O CONNECTION PINNAME NUMBERS

INPUTS

Space Temperature Sensor sptsens AI (10K Thermistor) J20-1,2

Supply Air Temperature sat AI (10K Thermistor) J2-1,2

Local Outside Air Temperature Sensor oatsens AI (10K Thermistor) J2-3, 4

Space Temperature Offset Pot sptopot AI (lOOK Potentiometer) J20-3

Indoor Air Quality iaq AI (4-20 ma) J4-2, 3

Outdoor Air Quality oaq AI (4-20 ma) J4-5, 6

Safety Chain Feedback safety DI (24 VAC) J1-9

Compressor Safety compstat DI (24 VAC) J1-2

Fire Shutdown firedown DI (24 VAC) J1 - 10

Enthatpy Switch enthatpy DI (24 VAC) J2-6, 7

Humidistat Input Status humstat DI (24 VAC) J5-7, 8

CONFIGURABLE INPUTS*

Space Relative Humidity sprh AI (4-20 ma)J4-2,3 or J4-5,6

Outside Air Relative Humidity oarh AI (4-20 ma)

Supply Fan Status fanstat DI (24 VAC)

Filter Status filtstat DI (24 VAC) J5-1,2 or J5-3,4 orJ5 5,6 or J5-7,8

Remote Occupancy Input remocc DI (24 VAC)

OUTPUTS

econocmd 4-20ma J2-5

sf DO Relay (24VAC, 1A) J1-4

comp_l DO Relay (24VAC, 1A) J1-8

comp_2 DO Relay (24VAC, 1A) J1-7

heat_l DO Relay (24VAC, 1A) J1-6

heat_2 DO Relay (24VAC, 1A) J1-5

aux_2 DO Relay (24VAC, 1A) J11-3

humizer DO Relay (24VAC, 1A) J11-7, 8

Economizer Commanded Position

Supply Fan Relay State

Compressor 1 Relay State

Compressor 2 Relay State

Heat Stage 1 Relay State

Heat Stage 2 Relay State

Power Exhaust Relay State

Dehumidification Relay State

LEGEND

AI - Analog Input

AO - Analog OutputDI - Discrete InputDO - Discrete Output* These inputs (if installed) take the place of the default input on the specific channel according to schematic.Parallel pins J5-1 = J2-6, J5-3 = J1-10, J5-5 = J1-2 are used for field-installation.

The RTU-MP controller requires the use of a Carrier

space sensor. A standard thermostat cannot be used with

the RTU-MP system.

Supply Air Temperature (SAT) Sensor - OnFIOP-equipped 50HC*D unit, the unit is supplied with asupply-air temperature (SAT) sensor (33ZCSENSAT).This sensor is a tubular probe type, approx 6-inches (12.7mm) in length. It is a nominal 10-k ohm thermistor.

The SAT is factory-wired. The SAT probe is wire-tied tothe supply-air opening (on the horizontal opening end) in

its shipping position. Remove the sensor for installation.Re-position the sensor in the flange of the supply-air

opening or in the supply air duct (as required by localcodes). Drill or punch a 1/2-in. hole in the flange or duct.

Use two field-supplied, self-drilling screws to secure thesensor probe in a horizontal orientation. See Fig. 29.

Outdoor Air Temperature (OAT) Sensor - The OAT is

factory-mounted in the EconoMi$er2 (FIOP or

accessory). It is a nominal 10k ohm thermistor attached toan eyelet mounting ring.

EconoMi$er2 The RTU-MP control is used with

EconoMiSer2 (option or accessory) for outdoor air

management. The damper position is controlled directlyby the RTU-MP control; EconoMi$er2 has no internal

logic device.

Outdoor air management functions can be enhanced with

field-installation of these accessory control devices:

Enthalpy control (outdoor air or differential sensors)

Space CO2 sensor

Outdoor air CO2 sensor

Field Connections Field connections for accessorysensors and input devices are made the RTU-MR at plugs

J1, J2, J4, J5, Jll and J20. All field control wiring thatconnects to the RTU-MP must be routed through the

raceway built into the corner post as shown in Fig. 22.

28

The raceway provides the UL required clearance betweenhigh- and low-voltage wiring. Pass the control wires

through the hole provided in the corner post, then feed thewires thorough the raceway to the RTU-MR Connect tothe wires to the removable Phoenix connectors and then

reconnect the connectors to the board.

Space Temperature (SPT) Sensors

A field-supplied Carrier space temperature sensor isrequired with the RTU-MP to monitor space temperature.There are 3 sensors available for this application:

• 33ZCT55SPT, space temperature sensor with override

button

• 33ZCT56SPT, space temperature sensor with override

button and setpoint adjustment

• 33ZCT59SPT, space temperature sensor with LCD

(liquid crystal display) screen, override button, and

setpoint adjustment

Use 20 gauge wire to connect the sensor to the controller.

The wire is suitable for distances of up to 500 ft. Use athree-conductor shielded cable for the sensor and setpoint

adjustment connections. If the setpoint adjustment(slidebar) is not required, then an unshielded, 18 or 20

gauge, two-conductor, twisted pair cable may be used.

Connect T-55 - See Fig. 31 for typical T-55 internalconnections. Connect the T-55 SEN terminals to

RTU-MP J20-1 and J20-2. See Fig. 50.

C08460

Fig. 50 - RTU-MP T-55 Sensor Connections

Connect T-56 See Fig. 33 for T-56 internalconnections. Install a jumper between SEN and SETterminals as illustrated. Connect T-56 terminals to

RTU-MP J20-1, J20-2 and J20-3 per Fig. 51.

"i,_---Jumper

C08461

Fig. 51 - RTU-MP T-56 Sensor Connections

Connect T-59 - The T-59 space sensor requires a

separate, isolated power supply of 24 VAC. See Fig. 51for internal connections at the T-59. Connect the SEN

terminal (BLU) to RTU-MP J20-1. Connect the COMterminal (BRN) to J20-2. Connect the SET terminal (STO

or BLK) to J20-3.

BRN (COM)

BLK (STO)II BLU (SPT)I II II I

OR SET SEN

ioooOPB COM- PWR+

ooo/ I I

........... JI

i 24 VACI

SENSORWIRING

POWERWIRING

NOTE: Must use a separate isolated transformer.

C07132

Fig. 52 - Space Temperature Sensor Typical Wiring(33ZCT59SPT)

Economizer controls --

Outdoor Air Enthalpy Control (PNO 33CSENTHSW) -

The enthalpy control (33CSENTHSW) is available as a

field-installed accessory to be used with the EconoMi$er2damper system. The outdoor air enthalpy sensor is part of

the enthalpy control. (The separate field-installedaccessory return air enthalpy sensor (33CSENTSEN) is

required for differential enthalpy control See below.)

Locate the enthalpy control in the economizer next to theActuator Motor. Locate two GRA leads in the factory

harness and connect the gray lead labeled "ESL" to the

terminal labeled "LOW". See Fig. 36. Connect theenthalpy control power input terminals to economizer

actuator power leads RED (connect to 24V) and BLK(connect to GND).

The outdoor enthalpy changeover setpoint is set at the

enthalpy controller.

Differential Enthalpy Control -- Differential enthalpy

control is provided by sensing and comparing the outsideair and return air enthalpy conditions. Install the outdoor

air enthalpy control as described above. Add and install a

return air enthalpy sensor.

To wire the return air enthalpy sensor, perform the

following:

1. Use a 2-conductor, 18 or 20 AWG, twisted pair cable

to connect the return air enthalpy sensor to the enthal-

py controller.

2. Connect the field-supplied RED wire to (+) spade

connector on the return air enthalpy sensor and the(+) terminal on the enthalpy controller. Connect the

BLK wire to (-) spade connector on the return air en-

thalpy sensor and the (-) terminal on the enthalpycontroller.

Indoor Air Quality (CO2 sensor) -- The indoor air qualitysensor accessory monitors space carbon dioxide (CO2)levels. This information is used to monitor IAQ levels.Several types of sensors are available, for wall mounting

29

in the space or in return duct, with and without LCDdisplay, and in combination with space temperature

sensors. Sensors use infrared technology to measure thelevels of CO2 present in the space air.

The CO2 sensors are all factory set for a range of 0 to2000 ppm and a linear mA output of 4 to 20. Refer to theinstructions supplied with the CO2 sensor for electricalrequirements and terminal locations. See Fig. 38 fortypical CO2 sensor wiring schematic.

To accurately monitor the quality of the air in theconditioned air space, locate the sensor near a return-airgrille (if present) so it senses the concentration of CO2leaving the space. The sensor should be mounted in alocation to avoid direct breath contact.

Do not mount the IAQ sensor in drafty areas such as near

supply ducts, open windows, fans, or over heat sources.Allow at least 3 ft (0.9 m) between the sensor and any

corner. Avoid mounting the sensor where it is influenced

by the supply air; the sensor gives inaccurate readings ifthe supply air is blown directly onto the sensor or if the

supply air does not have a chance to mix with the room airbefore it is drawn into the return airstream.

Wiring the Indoor Air Quality Sensor --

For each sensor, use two 2-conductor 18 AWG (AmericanWire Gage) twisted-pair cables (unshielded) to connect

the separate isolated 24 vac power source to the sensorand to connect the sensor to the RTU-MP control boardterminals.

To connect the sensor to the control, identify the positive(4 to 20 mA) and ground (SIG COM) terminals on thesensor. See Fig. 37. Connect the 4-20 mA terminal toRTU-MP J4-2 and connect the SIG COM terminal to

RTU-MP J4-3. See Fig. 53.

IAQ Sensor

24 VACC08462

Fig. 53 - RTU-MP / Indoor CO 2 Sensor(33ZCSENCO2) Connections

Outdoor Air Quality Sensor (PNO 33ZCSENCO2 plusweatherproof enclosure) -- The outdoor air CO2 sensor isdesigned to monitor carbon dioxide (CO2) levels in theoutside ventilation air and interface with the ventilation

damper in an HVAC system. The OAQ sensor is packagedwith an outdoor cover. See Fig. 40. The outdoor air CO2sensor must be located in the economizer outside air hood.

Wiring the Outdoor Air CO2 Sensor -- A dedicated powersupply is required for this sensor. A two-wire cable isrequired to wire the dedicated power supply for the sensor.The two wires should be connected to the power supplyand terminals 1 and 2.

To connect the sensor to the control, identify the positive(4 to 20 mA) and ground (SIG COM) terminals on theOAQ sensor. See Fig. 38. Connect the 4 to 20 mAterminal to RTU-MP J4-5. Connect the SIG COMterminal to RTU-MP J4-6.

OAQ Sensor/Fill Sensor

24 VACC08463

Fig. 54 - RTU-MP / Outdoor CO2 Sensor(33ZCSENCO2) Connections

On 50HC*D units equipped with factory-installed Smoke

Detector(s), the smoke detector controller implements theunit shutdown through its NC contact set connected to the

unit's CTB input. The FSD function is initiated via thesmoke detector's Alarm NO contact set. The RTU-MP

controller communicates the smoke detector's tripped

status to the BAS building control. See Fig. 30, thePremierLink wiring schematic.

The Fire Shutdown Switch configuration,MENU-_onfig-_Inputs-,qnput 5, identifies the

normally open status of this input when there is no firealarm.

Connecting Discrete Inputs

Filter Status

The filter status accessory is a field-installed accessory.

This accessory detects plugged filters. When installingthis accessory, the unit must be configured for filter status

by setting MENU-_onfig-_Inputs--_input 3, 5, 8, or 9

to Filter Status and normally open (N/O) or normallyclosed (N/C). Input 8 or 9 is recommended for easy of

installation. Refer to Fig. 47 and Fig. 49 for wireterminations at J5.

Fan Status

The fan status accessory is a field-installed accessory.This accessory detects when the indoor fan is blowing air.When installing this accessory, the unit must beconfigured for fan status by settingMENU-_onfig-_Inputs-,input 3, 5, 8, or 9 to FanStatus and normally open (N/O) or normally closed (N/C).Input 8 or 9 is recommended for easy of installation. Referto Fig. 47 and Fig. 49 for wire terminations at J5.

3O

Remote Occupancy Communication Wiring - Protocols

The remote occupancy accessory is a field-installed

accessory. This accessory overrides the unoccupied mode

and puts the unit in occupied mode. When installing thisaccessory, the unit must be configured for remote

occupancy by setting MENU_Config-_Inputs--,input 3,5, 8, or 9 to Remote Occupancy and normally open (N/O)

or normally closed (N/C).

Also set MENU--_Schedules--_occupancy source to DI

on/off. Input 8 or 9 is recommended for easy of

installation. Refer to Fig. 47 and Table 8 for wireterminations at J5.

Power Exhaust (output)

Connect the accessory Power Exhaust contactor coil(s) perFig. 55.

Power Exhaust

TAN

CTBTHERMOSTAT

GRA

C08464

Fig. 55 - RTU-MP Power Exhaust Connections

General

Protocols are the communication languages spoken by

control devices. The main purpose of a protocol is tocommunicate information in the most efficient method

possible. Different protocols exist to provide differentkinds of information for different applications. In the BAS

application, many different protocols are used, dependingon manufacturer. Protocols do not change the function of

a controller; just make the front end user different.

The RTU-MP can be set to communicate on four different

protocols: BACnet, Modbus, N2, and LonWorks. Switch 3

(SW3) on the board is used to set protocol and baud rate.

Switches 1 and 2 (SWl and SW2) are used to set theboard's network address. See Fig 55 for the switch setting

per protocol. The 3rd party connection to the RTU-MP isthrough plug J19.

NOTE: Power must be cycled after changing the SW1-3

switch settings.

Refer to the RTU-MP 3rd Part)' Integration Guide for

more detailed information on protocols, 3rd party wiring,and networking.

Space Relative Humidity Sensor - The RH sensor is notused with 50HC*D models at this time.

SW3 Protocol Selection

PROTOCOL DS8 DS7 DS6 DS5 DS4 DS3 DS2 DS1

BACnet MS[FP Unused OFF OFF OFF ON OFF Select Baud Select Baud(Master)

ModbusUnused OFF OFF ON ON OFF Select Baud Select Baud

(Slave)

N2Unused OFF OFF OFF ON ON OFF OFF

(Slave)

LonWorks Unused ON ON OFF ON OFF OFF OFF

NOT E: ¢_n_m _DS = Dip Switch Opt_ S_ _ NSTP 3&4_

BAOnet MS/TP SW3 example shown J J [ 1

Baud Rate Selections

BAUD RATE DS2 DS1

9600 OFF OFF

19,200 ON OFF

38,400 OFF ON

76,800 ON ON

(ON)

Fig. 56 - RTU-MP SW3 Dip Switch Settings

C07166

31

Local Access

BACview 6 Handheld

The BACview 6 is a keypad/display interface used toconnect to the RTU-MP to access the control information,read sensor values, and test the RTU, see Fig. 57. This isan accessory interface that does not come with the MPcontroller and can only be used at the unit. Connect theBACview 6 to the RTU-MP's J12 local access port. Thereare 2 password protected levels in the display (User andAdmin). The user password is defaulted to 0000 but canbe changed. The Admin password is 1111 and cannot bechanged. There is a 10 minute auto logout if a screen isidle. See Form 48-50H-T-2T, Appendix A for navigationand screen content.

Virtual BACview

Virtual BACview is a freeware computer program thatfunctions as the BACview 6 Handheld. The USB Link

interface (USB-L) is required to connect a computer to

the RTU-MP board. The link cable connects a USB portto the J12 local access port. This program functions and

operates identical to the handheld.

RTU-MP Troubleshooting

Communication LEDs

The LEDs indicate if the controller is speaking to thedevices on the network. The LEDs should reflect

communication traffic based on the baud rate set. The

higher the baud rate the more solid the LEDs will appear.

Port

P1

J12

PIProtocol Selector

RTU-MP

Cable P5 P5

BACview s Loca| Access CaNe

Fig. 57 - BACview 6 Handheld ConnectionsC07170

32

Table 9 - LEDsThe LEDs on the RTU-MP show the status of certain functions

If this LED is on... Status is...

Power The RTU MP has power

Rx The RTU MP is receiving data from the network segment

Tx The RTU MP is transmitting data over the network segment

DO# The digital output is active

The Run and Error LEDs indicate control module and network status

If Run LED shows... And Error LED shows... Status is...

2 flashes per second Off Normal

2 flashes,2 flashes per second alternating with Run LED Five minute auto-restart delay after system error

3 flashes, Control module has just been formatted2 flashes per second then off

4 flashes, Two or more devices on this network have the2 flashes per second then pause same ARC156 network address

Exec halted after frequent system errors or2 flashes per second On control programs halted

5 flashes per second On Exec start-up aborted, Boot is running

5 flashes per second Off Firmware transfer in progress, Boot is running

7 flashes per second 7 flashes per second, alternating with Ten second recovery period after brownoutRun LED

14 flashes per second, Brownout14 flashes per second alternating with Run LED

On On

Failure. Try the following solutions:• Turn the RTU-MP off, then on.• Format the RTU- MR

• Download memory to the RTU-MR• Replace the RTU- MR

NOTE: Refer to Form 48-50H-T-2T for completeconfiguration of RTU-ME operating sequences and

troubleshooting information. Refer to RTU-MP 3rd Party

Integration Guide for details on configuration and

troubleshooting of connected networks. Have a copy of

these manuals available at unit start-up.

SMOKE DETECTORS

Smoke detectors are available as factory-installed optionson 50HC*D models. Smoke detectors may be specified

for Supply Air only or for Return Air without or witheconomizer or in combination of Supply Air and Return

Air. Return Air smoke detectors are arranged for verticalreturn configurations only. All components necessary for

operation are factory-provided and mounted. The unit is

factory-configured for immediate smoke detectorshutdown operation; additional wiring or modifications to

unit terminal board may be necessary to complete the unitand smoke detector configuration to meet project

requirements.

Units equipped with factory-optional Return Air smokedetectors require a relocation of the sensor module at unit

installation. See "Completing Installation of Return Air

Smoke Sensor:" on page 35 for details.

System

The smoke detector system consists of a four-wire

controller and one or two sensors. Its primary function isto shut down the rooftop unit in order to prevent smoke

from circulating throughout the building. It is not to beused as a life saving device.

Controller

The controller (see Fig. 58) includes a controller housing,

a printed circuit board, and a clear plastic cover. Thecontroller can be connected to one or two compatible duct

smoke sensors. The clear plastic cover is secured to thehousing with a single captive screw for easy access to the

wiring terminals. The controller has three LEDs (forPower, Trouble and Alarm) and a manual test/reset button

(on the cover face).

Sensor

The sensor (see Fig. 59) includes a plastic housing, aprinted circuit board, a clear plastic cover, a sampling

tube inlet and an exhaust tube. The sampling tube (when

used) and exhaust tube are attached during installation.The sampling tube varies in length depending on the size

of the rooftop unit. The clear plastic cover permits visualinspections without having to disassemble the sensor. The

cover attaches to the sensor housing using four captive

screws and forms an airtight chamber around the sensingelectronics. Each sensor includes a harness with an RJ45

33

terminal for connecting to the controller. Each sensor hasfour LEDs (for Power, Trouble, Alarm and Dirty) and a

manual test/reset button (on the left-side of the housing).

Duct smoke sensorcontroller

Controller housing

and electronics

Conduit couplings J(supplied by installer)

Fastener J

(2X)

Conduit nuts

_ (supplied by installer)

_D

Conduitsupport plate

_TerminalblockcoverCovergasket

_(ordering option)

t/_ Controller cover

Trouble

Fig. 58 - Controller AssemblyC08208

Air is introduced to the duct smoke detector sensor's

sensing chamber through a sampling tube that extends intothe HVAC duct and is directed back into the ventilation

system through a (shorter) exhaust tube. The difference inair pressure between the two tubes pulls the sampled air

through the sensing chamber. When a sufficient amount of

smoke is detected in the sensing chamber, the sensorsignals an alarm state and the controller automatically

takes the appropriate action to shut down fans andblowers, change over air handling systems, notify the fire

alarm control panel, etc.

The sensor uses a process called differential sensing toprevent gradual environmental changes from triggering

false alarms. A rapid change in environmental conditions,

such as smoke from a fire, causes the sensor to signal analarm state but dust and debris accumulated over time

does not.

For installations using two sensors, the duct smoke

detector does not differentiate which sensor signals analarm or trouble condition.

/ Exhausttube

j Exhaustgasket SensorhousingF and electronics

tSee ]\\

Detail A I _x

\\

Intake

gasket \\\ \ \ \ \ Cover gasket

\\ / (orderingoption)

\ \\\ \\\aa

/Z/ Plug \_\\ \\ j Sensor cover

/_(@_ (ordSeal_pli, ngatu_l_eely) x x\\\\ \\ ......

Magnetic _S" ....................................................................................................."_l_]

rou e irT bl D ty

Fig. 59 - Smoke Detector SensorC08209

Smoke Detector Locations

Supply Air I The Supply Air smoke detector sensor islocated to the left of the unit's indoor (supply) fan. See

Fig. 60. Access is through the fan access panel. There isno sampling tube used at this location. The sampling tube

inlet extends through the side plate of the fan housing

(into a high pressure area). The controller is located on abracket to the right of the return filter, accessed through

the lift-off filter panel.

j/Smoke Detector Sensor

C08245

Fig. 60 - Typical Supply Air Smoke Detector SensorLocation

Return Air without Economizer I The sampling tube islocated across the return air opening on the unit basepan.

See Fig. 61. The holes in the sampling tube face

34

downward,intothereturnairstream.Thesamplingtubeisconnectedvia tubingto the returnair sensorthat ismountedonabrackethighonthepartitionbetweenreturnfilterandcontrollerlocation.(Thissensoris shippedinaflat-mountinglocation.Installationrequiresthat thissensorberelocatedtoitsoperatinglocationandthetubingto thesamplingtubebe connected.See"CompletingInstallationofReturn Air Smoke Sensor:" for details.)

Return Air Detector module

_ (shipping position shown)*

Controller module

Return Air Detector Sampling Tube

*RA detector must be moved from shipping position to operating position by installer

C07307

Fig. 61 - Typical Return Air Detector Location

Return Air with Economizer -- The sampling tube is

inserted through the side plates of the economizerhousing, placing it across the return air opening on the

unit basepan. See Fig. 62. The holes in the sampling tubeface downward, into the return air stream. The sampling

tube is connected via tubing to the return air sensor that is

mounted on a bracket high on the partition between returnfilter and controller location. (This sensor is shipped in a

fiat-mounting location. Installation requires that thissensor be relocated to its operating location and the tubing

to the sampling tube be connected. See installation steps

below.)

Completing Installation of Return Air SmokeSensor:

1. Unscrew the two screws holding the Return Air

Sensor detector plate. See Fig. 63. Save the screws.

2. Remove the Return Air Sensor and its detector plate.

3. Rotate the detector plate so the sensor is facing out-wards and the sampling tube connection is on the bot-

tom. See Fig. 64.

4. Screw the sensor and detector plate into its operatingposition using screws from Step 1. Make sure the

sampling tube connection is on the bottom and the ex-

haust tube is on the top. See Fig. 64.

5. Connect the flexible tube on the sampling inlet to the

sampling tube on the basepan.

Exhaust Tubes

Sample Tube

C08126

Fig. 63 - Return Air Detector Shipping Position

C08127

Fig. 64 - Return Air Sensor Operating Position

Additional Application Data -- Refer to Catalog No.HKRNKA-1XA for discussions on additional control

features of these smoke detectors including multiple unitcoordination.

Return Air

Sampling Tube

C08129

Fig. 62 - Return Air Sampling Tube Location

35

N"1"

_ > _IJ._ CRHEATER***A00

OZ

¢q

1"

o=

Q_OI

O3I a

o uJ

COQ

Table 10 - Unit Wire/Fuse or HACR Breaker Sizing Data

ELEC. HTR P .E. NO C.O. or UNPWR C.O.

NO RE. w/RE. (pwrd fr/unit)

NOM FUSEFLA FLA DISC. SIZE

(KW) MCA orHACRBRKR FLA LRA

FUSE DISC. SIZEor

MCA HACRBRKR FLA LRA

51.0 60 54 286

51.0/51.0 60/60 54/54 286/286

53.0/59.4 60/60 54/55 286/286

94.6/107.5 100/110 87/99 286/286

NONE - -

117A00 7.8/10.4 21.7/25.0

13 110A00 12.0/16.0 33.4/38.5I-,- 3.8

112A00 24.0/32.0 66.7/77.0

112A00/117A00 31.8/42.4 88.4/102.0

112A00/110A00 37.6/50.0 104.2/120.3

NONE - -

117A00 7.8/10.4 21.7/25.0

110A00 12.0/16.0 33.4/38.53.8

112A00 24.0/32.0 66.7/77.0

112A00/117A00 31.8/42.4 88.4/102.0

112A00/110A00 37.6/50.0 104.2/120.3

NONE - -

117A00 7.8/10.4 21.7/25.0

"1- 110A00 12.0/16.0 33.4/38.5t,,,,9 3.8,,_ 112A00 24.0/32.0 66.7/77.0

112A00/117A00 31.8/42.4 88.4/102.0

112A00/110A00 37.6/50.0 104.2/120.3

47.2 60 50 282

47.2/47.2 60/60 50/50 282/282

48.3/54.6 60/60 50/50 282/282

89._102.8 90/110 83/95 282/282

121.8/138.8 125/150 112/128 286/286

141.5/131.6 150/150 130/149 286/286

55.8 60 60 329

55.8/55.8 60/60 60/60 329/329

59.0/65.4 60/70 60/60 329/329

100.6/113.5 110/125 93/104 329/329

127.8/144.8 150/150 118/133 329/329

147.5/137.6 150/150 136/154 329/329

60.8 70 65 338

60.8/60.8 70/70 65/65 338/338

65.3/71.6 70/80 65/66 338/338

106.9/119.8 110/125 98/110 338/338

134.0/151.0 150/175 123/139 338/338

153.8/143.8 175/175 141/160 338/338

117.0/134.0 125/150 108/123 282/282

136.8/126.8 150/150 126/144 282/282

52.0 60 55 325

52.0/52.0 60/60 55/55 325/325

54.3/60.6 60/70 55/56 325/325

95.9/108.8 100/110 88/100 325/325

123.0/140.0 125/150 113/129 325/325

142.8/132.8 150/150 131/150 325/325

57.0 70 61 334

57.0/57.0 70/70 61/61 334/334

60.5/66.9 70/70 61/62 334/334

102.1/115.0 110/125 94/106 334/334

129.3/146.3 150/150 119/135 334/334

149.0/139.1 150/175 137/156 334/334

NONE - - 23.0 30 24 135

116A00 13.9 16.7 24.1 30 24 135

113A00 16.5 19.8 28.0 30 26 1351.8

115A00 33.0 39.7 52.9 60 49 135

114A00/116A00 41.7 50.2 66.0 70 61 135

115A00/113A00 50.0 60.1 63.4 70 72 135

NONE - - 24.8 30 26 157

o 116A00 13.9 16.7 26.4 30 26 157

I a 113A00 16.5 19.8 30.3 35 28 157W 1.8115A00 33.0 39.7 55.1 60 51 157

Q114A00/116A00 41.7 50.2 68.3 70 63 157

115A00/113A00 50.0 60.1 65.6 80 74 157

NONE - - 27.8 30 30 161

116A00 13.9 16.7 30.1 35 30 161

I 113A00 16.5 19.8 34.0 35 31 1611.8

115A00 33.0 39.7 58.9 60 54 161

114A00/116A00 41.7 50.2 72.0 80 66 161

115A00/113A00 50.0 60.1 69.4 80 78 161

NONE - - 17.3 20 18 105

118A00 17.0 20.4 28.0 30 26 1053.8

119A00 34.0 40.9 53.6 60 49 105

118A00/119A00 51.0 61.3 63.8 70 73 105

o NONE - - 18.1 20 19 116

a 118A00 17.0 20.4 29.0 30 27 116I w 3.8

_ 119A00 34.0 40.9 54.6 60 50 116118A00/119A00 51.0 61.3 64.8 70 74 116

NONE - - 20.9 25 22 130

I 118A00 17.0 20.4 32.5 35 30 1303.8

119A00 34.0 40.9 58.1 60 53 130

118A00/119A00 51.0 61.3 68.3 80 77 130

24.8 30 26 137

26.4 30 26 137

30.3 35 28 137

55.1 60 51 137

68.3 70 63 137

65.6 70 74 137

26.6 30 28 159

28.6 30 28 159

32.5 35 30 159

57.4 60 53 159

70.5 80 65 159

67.9 80 76 159

29.6 35 32 163

32.4 35 32 163

36.3 40 33 163

61.1 70 56 163

74.3 80 68 163

71.6 80 80 163

21.1 25 23 109

32.8 35 30 109

58.4 60 54 109

68.6 80 77 109

21.9 25 24 120

33.8 35 31 120

59.4 60 55 120

69.6 80 78 120

24.7 30 27 134

37.3 40 34 134

62.9 70 58 134

73.1 80 81 134

NOTE: See page 38 for table legend and notes.

36

Table 10 -- Unit Wire/Fuse or HACR Breaker Sizing Data (cont)N"I" ELEC. HTR R E. w/PWRD C.O.I

_- =n n NO RE.

I-- I >"> I-- NOM FUSE

:3 _ u..5 CRHEATER***AO0 (KW) FLA FLA or DISC, SIZE0 --Z

Q{DI

03I 13

o =

CO

NONE - -

117A00 7.8/10.4 21.7/25.0

r't 110A00 12.0/16.0 33.4/38.5I--09 112A00 24.0/32.0 66.7/77.0

112A00/117A00 31.8/42.4 88.4/102.0

112A00/110A00 37.6/50.0 104.2/120.3

NONE - -

117A00 7.8/10.4 21.7/25.0

110A00 12.0/16.0 33.4/38.5

112A00 24.0/32.0 66.7/77.0

112A00/117A00 31.8/42.4 88.4/102.0

112A00/110A00 37.6/50.0 104.2/120.3

NONE - -

117A00 7.8/10.4 21.7/25.0

"I" 110A00 12.0/16.0 33.4/38.5L_,,_ 112A00 24.0/32.0 66.7/77.0

112A00/117A00 31.8/42.4 88.4/102.0

112A00/110A00 37.6/50.0 104.2/120.3

NONE - -

116A00 13.9 16.7

113A00 16.5 19.8

115A00 33.0 39.7

114A00/116A00 41.7 50.2

115A00/113A00 50.0 60.1

I NONE - -

o 116A00 13.9 16.7

I a 113A00 16.5 19.87= 115A00 33.0 39.7Q

114A00/116A00 41.7 50.2

115A00/113A00 50.0 60.1

NONE - -

116A00 13.9 16.7

I 113A00 16.5 19.8

115A00 33.0 39.7

114A00/116A00 41.7 50.2

115A00/113A00 50.0 60.1

NONE - -

118A00 17.0 20.4

119A00 34.0 40.9

118A00/119A00 51.0 61.3

o NONE - -

118A00 17.0 20.4a=

I_ 119A00 34.0 40.9

118A00/119A00 51.0 61.3

NONE - -I

118A00 17.0 20.4119A00 34.0 40.9

118A00/119A00 51.0 61.3

MCA HACRBRKR FLA LRA

52.0 60 55 287

52.0/52.0 60/60 55/55 287/287

54.3/60.6 60/70 55/56 287/2873.8

95.9/108.8 100/110 88/100 287/287

123.0/140.0 125/150 113/129 287/287

142.8/132.8 150/150 131/150 287/287

56.8 70 61 330

56.8/56.8 70/70 61/61 330/330

60.3/66.6 70/70 61/61 330/3303.8

101.9/114.8 110/125 94/106 330/330

129.0/146.0 150/150 119/134 330/330

148.8/138.8 150/150 137/155 330/330

61.8 70 66 339

61.8/61.8 70/70 66/66 339/339

66.5/72.9 70/80 66/67 339/3393.8

108.1/121.0 110/125 99/111 339/339

135.3/152.3 150/175 124/140 339/339

155.0/145.1 175/175 143/161 339/339

w/RE. (pwrd fr/unit)

FUSE DISC. SIZEor

MCA HACRBRKR FLA LRA

55.8 60 60 291

55.8/55.8 60/60 60/60 291/291

59.0/65.4 60/70 60/60 291/291

100.6/113.5 110/125 93/104 291/291

127.8/144.8 150/150 118/133 291/291

147.5/137.6 150/150 136/154 291/291

60.6 70 65 334

60.6/60.6 70/70 65/65 334/334

65.0/71.4 70/80 65/66 334/334

106.6/119.5 110/125 98/110 334/334

133.8/150.8 150/175 123/139 334/334

153.5/143.6 175/175 141/160 334/334

65.6 80 71 343

65.6/65.6 80/80 71/71 343/343

71.3/77.6 80/80 71/71 343/343

112.9/125.8 125/150 104/116 343/343

140.0/157.0 150/175 129/144 343/343

159.8/149.8 175/175 147/165 343/343

25.2 30 27 137

26.9 30 27 137

30.8 35 28 1371.8

55.6 60 51 137

68.8 70 63 137

66.1 70 75 137

27.0 30 29 159

29.1 30 29 159

33.0 35 30 1591.8

57.9 60 53 159

71.0 80 65 159

68.4 80 77 159

30.0 35 32 163

32.9 35 32 163

36.8 40 34 1631.8

61.6 70 57 163

74.8 80 69 163

72.1 80 80 163

19.0 25 20 107

30.1 35 28 1073.8

55.8 60 51 107

65.9 70 75 107

19.8 25 21 118

31.1 35 29 1183.8

56.8 60 52 118

66.9 70 76 118

22.6 25 24 132

34.6 35 32 1323.8

60.3 70 55 132

70.4 80 79 132

27.0 30 29 139

29.1 30 29 139

33.0 35 30 139

57.9 60 53 139

71.0 80 65 139

68.4 70 77 139

28.8 35 31 161

31.4 35 31 161

35.3 40 32 161

60.1 70 55 161

73.3 80 67 161

70.6 80 79 161

31.8 35 34 165

35.1 40 34 165

39.0 40 36 165

63.9 70 59 165

77.0 80 71 165

74.4 80 82 165

22.8 25 25 111

34.9 35 32 111

60.5 70 56 111

70.7 80 79 111

23.6 30 26 122

35.9 40 33 122

61.5 70 57 122

71.7 80 80 122

26.4 30 29 136

39.4 40 36 136

65.0 70 60 136

75.2 80 83 136

NOTE: See page 38 for table legend and notes.

37

Legend and Notes for Table 10

LEGEND:BRKRCODISCFLALRAMCAPE

- Circuit breaker- Convenient outlet- Disconnect

- Full load amps- Locked rotor amps- Minimum circuit amps- Power exhaust

PWRD CO - Powered convenient outlet

UNPWR CO - Unpowered convenient outletNOTES:

1. In compliance with NEC requirements for multimotor andcombination load equipment (refer to NEC Articles 430 and440), the overcurrent protective device for the unit shall befuse or HACR breaker. Canadian units may be fuse or circuitbreaker.

2. Unbalanced 3-Phase Supply VoltageNever operate a motor where a phase imbalance in supplyvoltage is greater than 2%. Use the following formula to de-termine the percentage of voltage imbalance.

max voltage deviation from average voltage% Voltage imbalance = 1O0 x

average voltage

Example: Supply voltage is 230-3-60

AB = 224 vBC = 231 v

AC = 226 v

Average Voltage =(224 + 231 + 226)

3

681

3

= 227

Determine maximum deviation from average voltage.

(AB) 227 - 224 = 3 v

(BC) 231 - 227 = 4 v

(AC) 227- 226 = 1 v

Maximum deviation is 4 v.

Determine percent of voltage imbalance.

4% Voltage imbalance = 100 x

227

= 1.76%

This amount of phase imbalance is satisfactory as it is below themaximum allowable 2%.

IMPORTANT: If the supply voltage phase imbalance is more than2%, contact your local electric utility company immediately.

38

[POTENTIOMETER DEFAULTS SETTINGS:

• POWER EXH MIODLE• MI_IMU_ POE FULLY CLOSED

gCV _A× _IODLEOCV SET _IO_LE

: ENTHALPY C SETTING _LIF_ -

_I EXBi ....E......I F EEI

PNI_

VIO-

EL} BR

ECONOMIZER (FlOP/ACCESSORY)

RI_Tq_

i¢ EIva_

: , , DCRi BL"

• -- S FREE

: : ' A_O

I ECONOMIZER NOTES:• 1 6_o OHm, I WATT 5_ _ESlSTE_ SHOUL_ BE REMOVE_ ONLY WHE_

USING DIFFERENTIAL ENTHALPY OR DRY BULB

i 2 IF A SEPERATE FIELD SUPPLIED 24V TRANSFORMER IS USEO FOR THEIAO SENSOR POWER SUPPLY, IT CANNOT HAVE THE SECONDARY OF THE

TRAnSFORmER GROUR_ED

: 3 FOR FIELD INSTALLED REMOTE MINIMUM POSITION POT,REMOVE BLACK WIRE JUMPER BETWEEN P AN9 P1 AND SET

l CONTROL MINIMUM POSITION POT TO THE MINZMU_ POSITION

i R_T_ErF_EE,F_

lTAN

TO PWR EXHAUSTACCESSORY

PLG-R

, ACCY• 2-PO:I DAMPI

I_[_-i,,%%%<

L......Z

PL6-R

FOR STD

UNIT PL6

_E-

,I_<_--

I I

Economizer 2 Position Damper

Fig. 65 - EconoMi$er TM IV Wiring

,ECONOMIZER [

-P_K--_BLU_,......L_D i

YEL_

BLU_

- BLII --{ _t

-RED_ O-GRA_-GRA_ o-GRApN_

ORR_ I

DDC OPTIONS

ONLY

PNRJ

\Unit Without Economizer or

2 Position Damper

C10150

Step 11 -- Adjust Factory-Installed Options

Smoke Detectors --

Smoke detector(s) will be connected at the ControlsConnections Board, at terminals marked "Smoke

Shutdown". Remove jumper JMP 3 when ready to

energize unit.

EconoMiSer IV Occupancy Switch --

Refer to Fig. 65 for general EconoMi$er IV wiring.

External occupancy control is managed through aconnection on the Central Ternimal Board.

If external occupancy control is desired, connect a timeclock or remotely controlled switch (closed for Occupied,open for Unoccupied sequence) at terminals markedOCCUPANCY on CTB. Remove or cut jumper JMP 2 tocomplete the installation.

Step 12 -- Install Accessories

Available accessories include:

Roof Curb

Thru-base connection kit (must be installed before unit

is set on curb)

Manual outside air damper

Two-Position motorized outside air damper

EconoMi$er IV (with control and integrated barometricrelief)

EconoMi$er2 (without control/for external signal and

integrated barometric relief)Power Exhaust

Differential dry-bulb sensor (EconoMi$er IV)

Outdoor enthalpy sensor

Differential enthalpy sensor

Electric Heaters

Single Point kits

Low Ambient Controls

Thermostat / Sensors

CO2 sensor

DDC interface (PremierLink)

Louvered hail guard

Phase monitor control

Winter Start kit

Refer to separate installation instructions for information

on installing these accessories.

Pre-Start and Start-Up

This completes the mechanical installation of the unit.Refer to the unit's Service Manual for detailed Pre-Start

and Start-up instructions.

39

Copyright 2010 Carrier Corp. • 7310 W. Morris St. • Indianapolis, IN 46231 Printed in U.S.A. Edition Date: 02/10

Manufacturer reserves the right to change, at any time, specification8 and design8 without notice and without obligations,

Catalog No: 50HC-03SI

Replaces: New

4O