TRANE Package Units(both Units Combined) Manual L0905299

User Manual: TRANE TRANE Package Units(both units combined) Manual TRANE Package Units(both units combined) Owner's Manual, TRANE Package Units(both units combined) installation guides

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ITALLATIO

OPERATION

INT CE

WCX-IOM-1D

18-BB33D7-5

ALL phases of this installation must comply with

NATIONAL, STATE AND LOCAL CODES

Model:

WCX024G1

WCX030GI

WCX036G 1,3,4

WCX042G 1,3

WCX048G1,3,4

WCX060G1,3,4

Single Package Heat Pump

12 SEER Convertible

BAYLIFT002AA 2 " 5 TOn

LIFTING LUG KIT

IMPORTANT--This Document is customer propertyand is to remain with this unit. Please return to service information pack upon completion of work.

SAVINGTHEEARTH. SAVINGYOURMONEY.

All phases dthis installation must comply with the NATIONAL,

STATE & LOCAL CODES, In the absence of local codes, the

installation must conform with National Electric Code -- ANSI/

NFPA 70 or "LATEST REVISION."

Since The Trane Companyhas a policy of continuous product and product data

improvement, it reserves the right to change design and specification without notice.

NOTICE

Warnings and Cautions appear at appro-

priate locations throughout this manual.

Read these carefully.

_WARNING: Indicates a potentially haz-

ardous situation which, if not avoided, could

result in death or serious injury.

,_CAUTION" Indicates a potentially haz-

ardous situation which, if not avoided, may

result in minor or moderate injury. It may also

be used to alert against unsafe practices

and where property=damage=only accidents

could occur.

GENERAL INFORMATION

IMPORTANT: Read this entire manual before beginning instal-

lation procedures.

SAFETY NOTICE• THIS INFORMATION IS INTENDED FOR

USE BY INDIVIDUALS POSSESSING ADEQUATE BACK-

GROUNDS OF ELECTRICAL AND MECHANICAL EXPERI-

ENCE. ANY ATTEMPT TO REPAIR A CENTRAL AIR CONDI-

TIONING PRODUCT MAY RESULT IN PERSONAL INJURY

AND/OR PROPERTY DAMAGE. THE MANUFACTURER OR

SELLER CANNOT BE RESPONSIBLE FOR THE INTERPRE-

TATION OF THIS INFORMATION, NOR CAN IT ASSUME

LIABILITY IN CONNECTION WITH ITS USE•

IMPORTANT: RECONNECT ALL GROUNDING DEVICES•

ALL PARTS OF THIS PRODUCT CAPABLE OF CONDUCTING

ELECTICAL CURRENT ARE GROUNDED. IF GROUNDING

WIRES, SCREWS, STRAPS, CLIPS NUTS OR WASHERS

USED TO COMPLETE A PATH TO GROUND ARE REMOVED

FOR SERVICE. THEY MUST BE RETURNED TO THIER ORIGI-

NAL POSITION AND PROPERLY FASTENED.

IMPORTANT: ALL POWER LEGS MAY NOT BE BROKEN BY

CONTACTORS. SEE WIRING DIAGRAM ON UNIT CONTROL

BOX COVER.

BEFORE STARTING THE COMPRESSOR, THE CRANKCASE

HEATER SHOULD BE ENERGIZED FOR EIGHT HOURS

Read this manual carefully before attempting to install, operate, or

perform maintenance on this unit. Installation and maintenance

should be performed by qualified service technicians only.

NOTE: "Warnings" and "Cautions" appear at appropriate

places in this manual Your personal safety and the proper

operation of this air conditioning product require that you follow

them carefully. The manufacturer assumes no liability for

installations or servicing performed by unqualified personnel.

INSPECTION

1. Check for damage after the unit is unloaded. Report promptly,

to the carrier, any damage found to the unit. Do not drop the unit.

IMPORTANT: The use of"spreader bars" is required when |

hoisting the unit ( to prevent damage to sides and top ). i

2. Check the unit's nameplate to determine if the unit is correct for

the intended application. The power supply must be adequate

for both the unit and all accessories.

3. Check to be sure the refrigerant charge has been retained during

shipment. Access to 1/4" flare pressure taps may be gained by

removing the furnace compartment access panel.

©TYPICAL ROOFTOP INSTALLATION WITH FULL PERIMETER CURBS

(WCX024=060G Models)

FIELD SUPPLIED

SUPPORTS

AT EACH END

OF CURB

ROOF

FIELD SUPPLIED

RIGIDINBULATION

SUPPLY AIR

DUCT RETURN AIR

DUCT

ROOF MOUNTING

CURB

FIELD SUPPLIED

CANT STRIP

Page 2

@TYPICAL ROOFTOP iNSTALLATiON WiTH BAYCURB030A,038A

(WCX024-060G IVlodels)

SEE NOTE 1

SEE NOTE2

._ROOFINSULATION

ROOF

FIELD SUPPLIED

NOTE 1: The WCX036-042 Models extend out

past this end of the curb only.

NOTE 2: Only the WCX048, 060G Models

extend past both the end and the

side of the curb as illustrated

SUPPLY AIR

DUCT

ROOF MOUNTING

)CURB

RETURN AiR

DUCT

®CONVERTING HORIZONTAL TO DOWNFLOW

ROOFING

FIELD SUPPLIED

CANTSTRIP

FIELD SUPPLIED

SUPPORTS

ATEACH END

OFCURB

HORIZONTAL SUPPLY

AIR COVER

SHEET METAL

SCREWS HORIZONTAL RETURN

AIR COVER

NOTE

SUPPLY OPENING

1. REMOVE THE SCREW NEAREST TO THE

OPENING AND PULL THE PANEL FIRMLY

TOWARD THE OUTSIDE OF THE UNIT TO

DISENGAGE THE BACK ATTACHMENT

RETURN OPENING

2. REMOVE RIGHT HAND SCREW AND

MOVE PANEL TO THE RIGHT OR

REMOVE BOTH SCREWS

Page 3

DiMENSiONAL DATA

@ _ W_X024-060G OUTLINE =BACK

_r_ A

EVAPORA[OR CO I L &

_owER_ANE_

SUPPLY < <_- "_'_'-.'.,,,. /[! .52}

\\ ............................................................ I

1 __ .........APP/ ARANC_ _r_ r_ /I

YPICA[ (}ROSS S]CIION RETURN PER METER FLANGES

MODEL CORNER WEIGHT (LBS) UNIT A B C D E F G H J K L M N P

W1 W2 W3 W4 WEIGHT

WCX024G 79 74 74 104 331 21 25-3/8

56-1/2 36 29-3/16 18-9/16 11-1/16 6-9/16 6-13/16 17 17-1/2 10

WCX030G 82 64 86 110 342 21 24-3/8 3 4-7/16

WCX036G 110 82 88 118 398

WCX042G 110 82 88 118 398

19-1/4 27-1/2

64 36 29-1/16 18-9/16 11-1/16 6-9/16 11-1/8 17 17-1/2 10 3 8-3/4

19-1/4 27-1/2

WCX048G 149 104 117 134

WCX060G 149 104 117 134

504 24-1/4 28-1/2

65-1/4 45 33-3/8 21-1/16 15-1/16 4-15/16 9-1/8 21-15/1_ 20

504 24-1/4 28-1/2 14 3-1/2 8-5/16

Page 4

DiMENSiONAL DATA

WCX024=060G OUTLINE = FRONT

CONTRO. BOX

ACC SS _AN£L

_C©NDENSER COIL

& GUARD

\ ELECTRIC HEAIER

ACCESS PANEL

D66Y982

RECOMMENDED SERVICE CLEARANCE

BACK * 6.0"

LEFT SIDE 30.0"

RIGHT SIDE 24.0"

FRONT SIDE 30.0"

18"WITH FRESHAIR ACCESSORY

30" WITH ECONOMIZER

CLEARANCE TO

COMBUSTIBLE MATERIAL

BOTTOM 0.0"

BACK 1.0"

LEFT SIDE 6.0"

RIGHT SIDE 6.0"

FRONT SIDE 12.0"

TOP 36.0"

MODEL A B C

WCX024G 56-1/2 36 29-3/16

WCX030G

WCX036G 64 36 29-3/16

WCX042G

WCX048G 65-1/8 45 33-3/8

WCX060G

Page 5

REQUIRED CLEARANCE FOR UNiT iNSTALLATiON

AND ROOF PENETRATION HOLE SiZE REQUIRED

SERVOE SERVOE

SIDE RAIL /'"//._

woo

I I I E

I E E

SERVICE CLEARANCE & PENETRATION DIMENSIONS __ _J_ Ii I

MODEL NO. A B C D E F HOLE IN ROOF

WCX024-30G 42" 30" "12" 24" 36" 25" _ I

WCX036-04G 42" 30" "12" 30" 44" 25" _ _i_

WCX048-06G 42" 30" "12" 36" 50" 25" E

* 18" WITH FRESH AIR ACCESSORY

* 30" WITH ECONOMIZER _

LOCATIONS AND RECOMMENDATIONS

These units are designed for outdoor installation. For proper instal-

lation, the following recommendations must be considered.

NOTE: Unit shipped for horizontal installation. Convert to

downflow per instruction.

The discharge air from the condenser fans must be unrestricted for

a minimum of 3 feet above the unit.

Roof Mounting Curb (field assembled BAYCURB030A,038A and

BAYCU RB033A, BAYCU RB034A) or a field fabricated curb must be

in place before unit is hoisted to the roof.

Roof Mounting Curb (frame) must be installed on a flat, level

section of the roof(max, of 1/4" per foot pitch), providing alevel

mounting surface for the unit. In addition, provide sufficient

height above the roof to prevent water from entering unit.

In locations where deep snows are encountered,RAiSE THE UNIT

A MINIMUM OF 12" OFF THE ROOF, DECK OR SLAB--the chance

of the coil being blocked with snow wilt be reduced. The water that

occurs during the defrost has a better chance of flowing from the

vicinity of the unit.

Roof Mounting Curb used with WCY--F models is approximately

14" high. This is normally sufficient height to prevent snow blockage

and additional clearance is not necessary.

AVOID LOCATING THE UNIT WHERE SNOW TENDS TO DRIFT.

This will reduce the times when it is necessary for the customer to

remove the snow from around the unit. MAKE CERTAIN THE

CUSTOMER KNOWS THAT SNOW ACCUMULATIONS SHOULD

BE REMOVED FROM THE SIDES OF THE UNIT FOR BEST

EFFICIENCY.

A snow drift barrier may be installed around the unit to prevent a

build up of snow on the sides of the unit. The barrier should be of

sufficient distance from the unit to prevent restriction of airflow to

and from unit.

LOCATE THE UNIT SO THAT THE WATER VAPOR THAT DIS-

CHARGES UPWARD DURING DEFROST DOES NOT CONDENSE

ON WINDOWS AND FOG THEM OR CAUSE ICICLES TO FORM

ON OVERHANGS.

1. Be sure the mounting curb spans structural members (trusses)

of the roof, thereby providing sufficient support for weight of the

unit, curb and duct(s) plus any accessories (factory or field

installed). See Figures 1, 2, 3, 4, 5, 6, 7, 8, 9,10,11 and 12.

NOTE. If any internal accessories are to be added to the unit it

should be done at the shop if at all practical.

2. Unit should be positioned so Roof-Run-Off water does not pour

directly on unit.

Page 6

3. For"RoofTop Application," unit must be elevated above roof with

a mounting Curb or Frame.

4. Exhaust vents or other sources of contaminated air should not be

near unit air inlet if outside air is to be introduced as a make-up

air or the economizer ventilation feature is to be used.

5. Check the handling facilities to insure the safety of personnel and

the unit(s).

6. CAUTION MUST BE TAKEN AT ALL TIMES TO AVOID PER-

SONAL INJURIES AND/OR DAMAGE TO EQUIPMENT.

7. The unit must be mounted level for proper drainage of defrost

water through the holes in the base pan.

8. Flexible duct connectors must be of a flame retardant material. All

duct work outside of the structure must be insulated and weath-

erproofed in accordance with local codes.

9. Roof flashing must be installed to seal the roof curb cavity and

must conform to local building codes.

10. Holes through exterior walls must be sealed in accordance with

local codes.

11. Access and service clearances for the unit must be given careful

consideration when locating the duct entrance openings. Fig-

ures 6 and 8 provide unit dimensions.

12. All fabricated outdoor ducts should be as short as possible.

13. Be sure the hole in the structure for the ducts is large enough to

accommodate the fabricated ducts and the insulation surrounding

them. (See Figure 6.)

CLEARANCES

1. The recommended clearances for single-unit installations are

illustrated in Figures 5 and 6. These minimum requirements are not

only an important consideration when determining unit placement,

but they are also essential to ensure adequate serviceability,

maximum capacity, and peak operating efficiency.

2. Any reduction of the unit clearances indicated in this illustration

may result in condenser coil starvation, or the recirculation of warm

condenser air. Actual clearances which appear to be inadequate

should be reviewed with a local sales engineer.

IMPORTANT!: To convert to downflow remove covers from

the downflow supply and return air openings and place them

over the horizontal supply and return air openings (painted

side out) and secure with sheet metal screws.

INSTALLATION

UNIT SUPPORT

If unit is to be roof mounted, check building codes for weight

distribution requirements. Refer to accessory roof curb mounting

instructions. Check unit nameplate for supply voltage required.

Determine if adequate electrical power is available. Refer to speci-

fication sheet.

LOCATION AND CLEARANCES

Installation of the unit should conform to local building codes or, in

the absence of local codes, to the ANSI/N FPA No. 70-1987 National

Electrical Code or "Latest Revision." Canadian installations must

conform to CSA and local codes.

IMPORTANT!: DO NOT LIFT THE UNIT WITHOUT TEST-

LIFTING FOR BALANCE AND RIGGING.DO NOT LIFT THE

UNIT IN WINDY CONDITIONS OR ABOVE PERSONNEL. DO

NOT LIFT THE UNIT BY ATTACHING A CLEVIS, HOOKS,

PINS OR BOLTS TO THE UNIT CASING, CASING HARD-

WARE, ANGLES, TABS OR FLANGES. FAILURE TO OB=

SERVE THESE WARNINGS MAY RESULT IN EQUIPMENT

DAMAGE.

4. When the curb and air ducts have been properly installed, the unit

is ready to be hoisted to the roof and set in position.

IMPORTANT!: "Spreader Bars" must be used when

hoisting unit.

5. IMPORTANT: The unit must be lowered into position P.V.C.

rubber tape on the curb flange permits the unit to be

repositioned if required without destroying the P.V.C. rub-

ber seals affixed to mounting curb.

Select a location that will permit unobstructed airflow into the

condenser coil and away from the fan discharge and permit unob-

structed service access into the compressor compartment. Sug-

gested airflow clearances and service clearances are given in

Figure 5.

PLACING AND RiGGiNG

1. Before preparing the unit for lifting, check the outline drawing for

center of gravity for lifting safety. Because of placement of

internal components, the unit weight may be unevenly distrib-

uted. Approximate unit weights are given in outline drawing on

page 3.

NOTE. Accessory BA YLIFTOO2M Four (A) lifting lugs are recom-

mended for rigging the unit for hoisting. See Figure 7 insert "B".

2. Insert the four lifting tugs in openings provided in drip lip on

perimeter of unit. See Figure 7 insert "B".

3. Before hoisting the unit, be sure that the proper method of rigging

is used, with straps or slings and spreader bars for protection

during lifting.

6. PLACING UNIT ON MOUNTING CURB--The unit is designed

with a perimeter drip lip that is lower than the unit base ban, see

Figure 7 insert "A".

7, Position the unit drip tip down over and in contact with the outside

corner of the curb, as illustrated in Figure 7 insert "A". Continue

to lower unit on top of curb, with the unit drip tip astraddle and in

contact with both the end and side rail of curb, the unit is now

resting on top of curb.

8. Take the two (2) hold down brackets shipped with curb and secure

unit to curb with hold down brackets as illustrated in Figure 8

insert "A".

Page 7

SPREADER BARS

OUTDOORCOIL

END OFUNIT

P_ BAYLIFT002A

DIMPLE LIFTING LUGS

GASKET SEAL'

NOTE: The inner perimeter of the Drip Lip on all

units should be flush with the outer perimeter

of the curb on the two sides shown here. See

Figure 2 for the location of the unit overhang

on the WCX036-060G Models with

BAYCU RB030A,038A.

BASE OF UNIT

REST ON TOP OF

CURB RAILS

DRIP LIP ON

PERIMETER OF UNIT

CURB CORNER

FLANGE OF

CURB

EXISTING

SHEET METAL

ISCREW

HOLD-DOWN

WITH

CURB

Page 8

iNSTALLATiON

ROOFTOP ==UNITS

For roof top applications using a field fabricated frame and ducts, 4. Place the unit on the frame or roof curb. Refer to Figures 9 or

use the following procedure: 10.

1. The frame must be located and secured by bolting or welding to

the roof. Flashing is required.

2. The hole in the roof must be prepared in advance of installing the

unit.

5. Secure the unit to the frame or roof curb.

6. Insulate any ductwork outside of the structure with at least two (2)

inches of insulation and then weatherproof. There must be a

weatherproof seal where the duct enters the structure.

3. Secure the ducts to the roof. 7. Complete the installation according to the instructions in the

following sections of this manual.

®TYPICAL ROOFTOP APPLICATIONS WITH FRAME

lwcxo24-O6OG) , .

RETURN AIR SUP _ •

WEATHER-PROOF

DUCT

ROOF FLASHING

ANGLEIRON

FRAME

®TYPICAL ROOFTOP APPLICATION WITH FRAME

(WCX024=060G MODELS) /

DUCT

ROOF FLASHING

RETURN AIR

ROOF FLASHING

SUPPLY AIR

FRAME

Page 9

iNSTALLATiON

GROUND LEVEL ==HORIZONTAL UNITS

For ground level installations, the unit should be positioned on a pad

the size of the unit or larger• The unit must be level on the pad. The

pad must not come in contact with the structure (See Figure 11 .) Be

sure the outdoor portion of the supply and return air ducts are as

short as possible•

2. Attach the supply and return air ducts to the unit•

3. Insulate any ductwork outside of the structure with at least 2

inches of insulation and weatherproof• There must be a weath-

erproof seal where the duct enters the structure•

Proceed with the installation as follows:

1. Place the unit on the pad and the five (5) rubber isolators

provided•

4. Complete the installation according to the instructions in the

following sections of this manual•

®TYPICAL GROUND LEVEL APPLICATION

(WCX024-060G MODELS)

SUPPLY AIR

RETURN AIR DUCT

DUCT

SIDING I_P"

OUTDOOR AIR

DISCHARGE

I '

EXTERIOR

WALL

OUTDOOR AIR

INTAKE

SUPPORT PAD

FOUNDATION

INSULATE

WEATHERPROOF FLEXIBLE DUCT ISOLATORS

OR RAIN SHIELD CONNECTORS (1 PER CORNER

AND 1 UNDER

UNIT CONTROL BOX) 2046eps

DUCTWORK

ATTACHING DOWNFLOW DUCTWORKTO ROOF CURB ATTACHING HORIZONTAL DUCTWORK TO UNiT

Supply and return air flanges are provided on the roof curb for easy

duct installation• All ductwork must be run and attached to the curb

before the unit is set into place•

Follow these guidelines for ductwork construction:

Connections to the unit should be made with three-inch canvas

connectors to minimize noise and vibration transmission•

Elbows with turning vanes or splitters are recommended to mini-

mize air noise and resistance•

The first elbow in the ductwork leaving the unit should be no closer

than two feet from the unit, to minimize noise and resistance•

All conditioned air ductwork should be insulated to minimize heat-

ing and cooling duct losses• Use a minimum of two (2) inches of

insulation with a vapor barrier• The outside ductwork must be

weatherproofed between the unit and the building•

When attaching ductwork to a horizontal unit, provide a flexible

watertight connection to prevent noise transmission from the unit to

the ducts• The flexible connection must be indoors and made out

of heavy canvas•

NOTE: Do not draw the canvas taut between the solid ducts. }

Page 10

FLANGE _FIELD DUCT

DUCT ATTACHMENT METHODS

AIR PROOF \

THIS SEAM

BASE

FIELD DUCT,ql X

U 'UNIT DUCT

FLANGE

/AIR PROOF

_THIS SEAM

FIELDDUCT4L _TBASE

Lt UNIT DUCT FLANGE

/AIR PROOF

UNITFLANGEDUCT_UNIT BASE

"FIELD DUCT

UNIT BASE

UNIT DUCT

FLANGE

WITH BUTYL OR

SILICONE

NOT RECOMMENDED FIELD DUCT

DOWNFLOW

/I_,. THIS SEAM

UNIT DUCT u _

FLANGE FIELD DUCT

HORIZONTAL

The following warning complies with State of California law, Proposition 65.

AWARNING: This product contains

fiberglass wool insulation! Fiberglass dust and ceramic

fibers are believed by the State of California to cause

cancer through inhalation. Glasswool fibers may also

cause respiratory, skin, or eye irritation.

CONDENSATE DRAIN PiPiNG

A 3/4-inch female NPT condensate drain connection is pro-

vided on the evaporator access panel end of the unit. See

Figure 4. Provide a trap and fill it with water before starting the

unit to avoid air from being drawn through. Follow local codes

and standard piping practices when running the drain line.

Pitch the line downward away from the unit, Avoid long

horizontal runs, See Figure 13.

NOTE: Do not use reducing fittings in the drain lines. The

condensate drain must be:

• Made of 3/4" pipe size.

• Pitched 1/4" per foot to provide free drainage to

convenient drain system,

• Trapped.

• Must not be connected to closed drain system.

TYPICAL CONDENSATE DRAIN PiPiNG

3/4" PVC OR COPPER

TUBING AND F

1-1/2" MIN.

Page 11

FILTER INSTALLATION

TABLE 1

AiR FILTERS

Filters are to be used with the WCX024-060G heating/cooling

units. The basic unit does not have filters in it. However, afilter

frame accessory is offered that will allow filters to be installed

within the unit.

Otherwise a filter rack must be installed by the installer in the

duct work.

Affix the filter label supplied with the unit adjacent to the filter

area.

NOMINAL FILTER* FILTER

UNIT CFM (Sq Ft) SIZE RESISTANCE

WCX024G 800 2.67 0.05

WCX030G 1000 3.33 0.05

WCX036G 1200 4.00 0.05

WCX042G 1400 4.67 0.05

WCX048G 1600 5.33 0.05

WCX060G 2000 6.67 0.05

*Filters must be installed in the return air system. The above

square footages are based on 300 F.P.M. face velocity. If

permanent filters are used, size per mfg. recommendation

with clear resistance of 0.05"WC.

ELECTRICAL WIRING

ELECTRICAL CONNECTIONS

Electrical wiring and grounding must be installed in accordance with

local codes or, in the absence of local codes, with the National

Electrical Code ANSI/NFPA 70, Latest Revision.

ELECTRICAL POWER

It is important that proper electrical power be available for the unit.

Voltage variation should remain within the limits stamped on the unit

nameplate.

DISCONNECT SWITCH

Provide an approved weather-proof disconnect either on the side of

the unit or within close proximity and within sight of the unit.

OVER CURRENT PROTECTION

The branch circuit feeding the unit must be protected as shown on

the unit rating plate.

POWER WIRING

The power supply lines must be run in weathertight conduit to the

disconnect and into the bottom of the unit control box. Provide strain

relief for all conduit with suitable connectors.

Provide flexible conduit supports whenever vibration transmission

may cause a noise problem within the building structure.

Be sure all connections are made tight. See Figure 14.

NOTES: For branch circuit wiring (main power supply to unit

disconnect), wire size for the length of run should be determined

using the circuit ampacity found on the unit nameplate and the

N.E.C.

For more than 3 conductors in a raceway or cable, see the

N.E.C. for derating the ampacity of each conductor.

GROUNDING: THE UNiT MUST BE ELECTRICALLY GROUNDED

IN ACCORDANCE WITH LOCAL CODES OR THE NATIONAL

ELECTRIC CODE.

NOTE: Ground the unit internally as provided. See wiring

diagram for location.

Page 12

CONTROL WIRING (CLASS II)

Low voltage control wiring should not be run in conduit with power

wiring unless Class 1 wire of proper voltage rating is used. Route

the thermostat cable or equivalent single leads of No. 18 AWG

colored wire from the thermostat subbase terminals through the

rubber gromment on the unit. See Figure 5 for the control entry

location. Make connections as shown on the unit wiring diagram

and in Figure 14.

Do not short thermostat wires since this will damage the control

transformer.

Recommended wire sizes and lengths for installing the unit thermo-

stat are provided in Table 2. The total resistance dthese low

voltage wires must not exceed one (1) ohm. Any resistance in

excess of 1 ohm may cause the control to malfunction because of

the excessive voltage drop

TABLE 2

THERMOSTAT WIRE SIZE AND MAXIMUM LENGTH

WIRE SIZE MAXIMUM LENTGH (Ft)

18 75

16 125

14 200

THERMOSTAT HEAT ANTICIPATOR

The thermostat heat anticipators should be set to equal the amper-

age draw of the Wl thermostat circuit.

IMPORTANT: Upon completion of wiring check all electrical

connections, including factorywiringwithinthe unit. Make sure

all connections are tight. Replace and secure all electrical box

covers and access doors before leaving the unit or turning on the

power to the unit.

Afterallelectricalwiringiscomplete,setthethermostatsystem

switch in the OFF position so that the compressor will not run

and then apply power by closing the system main disconnect switch.

This will activate the compressor sump heat. Do not change the

Thermostat System Switch until power has been applied long

enough to evaporate any liquid R-22 in the compressor. It is

recommended that the sump heater be energized for eight (8) hours

prior to starting.

®WCX=G FIELD WIRING DIAGRAM

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NOTES:

1 FUSED DISCONNECT SIZE, POWER WIRING AND

GROUNDING OF EQUIPMENT MUST COMPLY WITH

CODES

2 BE SURE POWER SUPPLY AGREES WITH

EQUIPMENT AND HEATER NAMEPLATE

3 LOW VOLTAGE WIRING TO BE 18 AWG MINIMUM

CONDUCTOR.

4 SEE HEATER NAMEPLATE FOR CURRENT RATING

OF HEATER USED.

5 SEE UNIT AND HEATER DIAGRAM FOR

ELECTRICAL CONNECTION DETAILS,

6 IF ELECTRIC HEATER ACCESSORY IS NOT

INSTALLED OMIT THE ELECTRIC HEATER,

ASSOCIATED POWER WIRES AND THE 'W' AND 'X2'

THERMOSTAT WIRES

7 FIG 3 DEMONSTRATES CONNECTION OF THE

OUTDOOR THERMOSTAT ACCESSORY ONLY, FOR

FURTHER UNIT CONNECTION DETAILS REFER TO

THE OTHER FIGURES

8 THE 41A(BR) WIRE IS FIRST STAGE ELECTRIC

HEAT IF THE ELECTRIC HEATER ACCESSORY

HAS TWO HEATING STAGES THE 41C(BR) WIRE IS

SECOND STAGE ELECTRIC HEAT,

9 WHEN THE BAYECON054A OR -055A ECONOMIZER

IS INSTALLED THE BAYRLAY003 RELAY

ACCESSORY KIT IS REQUIRED TO INTERFACE

THE ECONOMIZER TO THE HEAT PUMP FOR

PROPER SYSTEM OPERATION, WHEN THE

BAYECON054B OR -055B OR 073A ECONOMIZER IS

INSTALLED, THE BAYRLAY004A RELAY

ACCESSORY KIT IS REQUIRED TO INTERFACE

THE ECONOMIZER TO THE HEAT PUMP FOR

PROPER SYSTEM OPERATION

10 THE BAYSTAT033A OUTDOOR THERMOSTAT

ACCESSORY KIT CONTAINS A THERMOSTAT AND

A RELAY THE RELAY IS NOT REQUIRED TO BE

USED IN THIS APPLICATION,

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Page 13

START -UP

PRE-START QUICK CHECKLIST

•Is the unit properly located and level with the proper clearance?

See Figure 5.

• Is the duct work correctly sized, run, taped, insulated, and

weatherproofed with proper unit arrangement. See Ductwork

Installation section.

• Is the condensate line properly sized, run, trapped, and pitched?

• Isthe filter of the correct size and number? Is it clean and in place?

• Is the wiring properly sized and run according to the unit wiring

diagram?

• Are all the wiring connections, including those in the unit, tight?

• Has the unit been properly grounded and fused with the recom-

mended fuse size? See Wiring Data.

• Isthe thermostat level, correctly wired, welt located, and set for the

proper heat anticipation?

• Have the air conditioning systems been checked at the service

ports for charge and leak tested if necessary?

To start the unit in the cooling mode, set the thermostat system

switch to COOL and move the thermostat COOL indicator to a

setting below room temperature. The condenser (outdoor) fan

motor compressor and evaporator (indoor) fan motor will operate

automatically.

OPERATING PRESSURES

After the unit has operated in the cooling mode for a short period of

time, install pressure gauges on the gauge ports of the discharge

and suction line valves. Check the suction and discharge pressures

and compare them to the normal operating pressures provided in

the unit's SERVICE FACTS.

NOTE: Do not use the pressures from the unff's SERVICE FACTS

to determh_e the unit refrigerant charge. The correct charge is

shown on the unit nameplate. To charge the system accurately,

weigh in tlhe charge according to the unit nameplate.

VO LTAG E

With the compressor operating, check the line voltage at the unit.

The voltage should be within the range shown on the unit name-

plate. If low voltage is encountered, check the size and length of the

supply line from the main disconnect to the unit. The line may be

undersized for the length of the run.

•Do the condenser fan and indoor blower turn free without rubbing,

and are they tight on the shafts?

•Has the indoor blower speed been determined and the proper

speed been set? See the Unit Wiring Diagram.

•Has all work been done in accordance with applicable local and

national codes?

•Are all covers and access panels in place to prevent air loss and

safety hazards?

STARTING THE UNIT IN THE COOLING MODE

CAUTION: Before starting the system on the cooling cycle, turn the

thermostat switch to OFF and close the unit disconnect switch. This

procedure energizes the compressor crankcase heater, vaporizing

any liquid refrigerant in the crankcase. This is a precaution against

foaming at startup which could damage the compressor bearings.

Allow the heater to operate a minimum of eight (8) hours.

NOTE: See the section on "Sequence of Operation" for a descrip-

tion of the cooling operating sequence.

COOLING SHUT DOWN

Place the system selector in the OFF position or reset thermostat at

a setting above room temperature.

Do not de-energize the main power disconnect except when unit it

to be serviced. Power is required to keep the heat pump compres-

sor warm and boil off refrigerant in the compressor.

STARTING THE UNIT IN THE HEATING MODE

NOTE: See the section on "Sequence of Operation" for a descrip-

tion of the heat pump heating operating sequence.

Check to make sure all grilles an registers are open an all unit

access doors are closed before start-up.

Slowly set the thermostat above rom temperature until achieving a

first stage call for heat and place the fan switch in the AUTO or ON

position.

HEATING SHUT-DOWN

Place the system selector switch at OFF or place the heating

selector lever at a setting below room temperature.

WARNING: DO NOT OPERATE THE UNIT

WITHOUT THE EVAPORATOR FAN ACCESS PANEL IN

PLACE. REINSTALL THE ACCESS PANEL AFTER

PERFORMING ANY MAINTENANCE PROCEDURES ON THE

FAN. OPERATING THE UNIT WITHOUT THE ACCESS

PANEL PROPERLY INSTALLED MAY RESULT IN SEVERE

PERSONAL INJURY OR DEATH.

Page 14

SEQUENCE OF OPERATION

GENERAL

Operation of the unit heating and cooling cycles is automatic for

HEAT and COOL functions. (The optional automatic changeover

thermostat, when in the AUTO position, automatically changes to

heat or cool with sufficient room temperature change.) The fan

switch can be placed in either the ON position, causing continuous

evaporator (indoor) fan operation, or the AUTO position causing fan

operation to coincide with heating or cooling run cycles.

COOLING MODE

(NOTE: TSH & TSC are contacts internal to the indoor thermostat.)

With the disconnect switch in the ON position, current is supplied to

the compressor crankcase heater and control transformer. (The

outdoor fan relay (ODF) relay is energized through normally closed

contacts on the defrost timer control (DFC) on the 460V and 600V

units only.) The cooling cycle is enabled through the low voltage

side of the control transformer to the "R" terminal on the indoor

thermostat. With the system switch in the AUTO position and TSC-

1 contacts closed, power is supplied to the "O" terminal on the

indoor thermostat to the switchover valve coil (SOV). This energizes

the switch-over valve (SOV) and places it in the cooling position (it

is in the heating position when de-energized).

When the indoor temperature rises 1-1/2 degrees, TSC-2 contacts

close, supplying power to the "Y" terminal on the indoor thermostat,

and to the compressor contactor (CC). This starts the outdoor fan

motor and compressor. The TSC-2 contacts also provide power to

the "G" terminal which provides power to the fan relay (F) starting

the indoor fan motor.

HEATING MODE

With the disconnect switch in the "ON" position, current is supplied

to the compressor crankcase heater and control transformer. (The

outdoor fan relay (ODF) is energized through normally closed

contacts on the defrost timer control (DFC) on the 460V and 600V

units.) Starting at the "R" terminal on the indoor thermostat, current

goes through the system switch (which is in "AUTO" position) to the

TSH=I contacts. When closed, these contacts supply power to

terminal "Y" on the indoor thermostat as well as to the heating

anticipator. The switch-over valve will not energize because of the

high resistance of the heating anticipator in the thermostat. Power

is provided from "Y" to the compressor contactor (CC) which starts

the compressor and outdoor fan motor. The indoor thermostat

contact TSH=I also provides power to "G" terminal on the indoor

thermostat energizing the fan relay (F), which starts the indoor fan

motor.

SUPPLEMENTARY NEAT

The supplementary electric heat is brought on when the indoor

temperature drops 1-1/2 degrees below the thermostat setting.

TSN=2 contacts close providing power to the "W" terminal on the

indoor thermostat and to the supplementary heater control circuit.

NOTE. The fan relay (F) must have been energized. An outdoor

thermostat may have been added to disallow the second stage (if

provided) of electric heat above a selected outdoor temperature. If

the outdoor temperature falls below the setting on the outdoor

thermostat, this additional heater stage will come on. When the

outdoor air temperature rises, and the outdoor T-stat setpoint is

reached, the system will revert back to first stage electric heating.

When the indoor ambient is satisfied, TSH=2 contacts will open and

the unit will revert back to the compressor only heating mode and

then off. For emergency heat (use of supplementary electric heat

only), an emergency (EMERG) heat switch is provided within the

thermostat. When placed in the emergency heat position, it will

disable the compressor, bypass the outdoor thermostats, if pro-

vided, and engage the supplementary electric heaters and indoor

fan.

DEMAND DEFROST OPERATION

During the heating cycle, the outdoor coil may require a defrost

cycle which is determined by the demand defrost control (DFC).

This control continuously measures the outdoor coil temperature

(CBS) and the outdoor ambient temperature (ODS-B) and calcu-

lates the difference or detta-T measurement. When the calculated

detta-T is met, the demand defrost control (DFC) opens the circuit

to the outdoor fan motor (ODM) and energizes the switch-over valve

(SOV), placing the unit in the cooling mode to defrost the outdoor

coil. The outdoor coil temperature sensor (CBS) terminates the

defrost cycle, or times off after twelve minutes in defrost, the (DFC)

energizes the outdoor fan motor (ODM) and twelve seconds later

de-energizes the (SOV), which returns the unit to the heating mode.

Supplementary electric heat, if provided, is brought on to control

indoor temperature during the defrost cycle.

ICM FAN MOTOR ADJUSTMENTS (WCX060G ONLY)

If the airflow needs to be increased or decreased, see the Airflow

Table in the Service Facts. Information on changing the speed of the

blower motor for the WCY060F is in the Blower Performance Table.

Blower speed changes are made on the ICM Fan Control mounted

in the control box. The ICM Fan Control controls the variable speed

motor.

There is a bank of 8 dip switches, (See Figure 15), located at the

lower right side of the board. The dip switches work in pairs to match

the cooling/heat pump airflow (CFM/TON), Fan off-delay options,

and electric heat airflow adjustment. The switches appear as shown

in Figure 15.

®ICM FAN CONTROL

CFM FAN

CFM

SELECTION DIP

LIG_ .SWITCHES _

/21C800796P01_

._CNT03600 qz

Y Y LO

R W3 W2 Wl

12345678

DIP SWITCHES (TYPICAL SETTINGS)

Page 15

DEMAND DEFROST SYSTEM

DEFROST CONTROL

The demand defrost control measures heat pump outdoor ambient

temperature with a sensor located outside the outdoor coil. A

second sensor located on the outdoor coil is used to measure the

coil temperature. The difference between the ambient and the

colder coil temperature is the difference or detta-T measurement.

This detta-T measurement is representative of the operating state

and relative capacity of the heat pump system. By measuring the

change in delta-T, we can determine the need for defrost. The coil

sensor also serves to sense outdoor coil temperature for termina-

tion of the defrost cycle.

FAULT DETECTION

A fault condition is indicated by the flashing light on the defrost

control inside the heat pump control box.

In normal operation, the defrost control light wilt flash once each

second. If the light is flashing more than once per second or not-at-

all, refer to the service manual for that unit.

PiN IDENTIFICATION

FRC DFT

[]

TST

TEST COMMON

DEFROST CONTROL CHECKOUT

Normal operation requires:

a. LED on board flashing 1 time/second.

b. 24V AC between R & B

PIN IDENTIFICATION (See Figure)

1. TEST_COMMON (Shorting any of the other pins to this pin

causes the function of the other pin to be executed. Leaving this

pin open results in the normal mode of operation.)

2. TST = Test (Shorting TEST_COMMON to this pin speeds up

all defrost board timings.)

c. 24V AC between Y & B with unit operating

d. Defrost initiation when FRC_DFT pin is shorted to

TEST_COMMON pin.

If a defrost control problem is suspected, proceed to DEMAND

DEFROST CONTROL CHECKOUT in this Service Facts.

3. FRC_DFT = Forced Defrost (Short TEST_COMMON to this pin

for two (2) seconds to initiate a forced defrost. Remove the short

after defrost initiates.)

WARNING: DONOTconnect24VACtoTI

(ODS-A) terminal. ODS-A thermistor WILL BE BLOWN.

PROCEDURE FORTESTING SENSORS

Measure the temperature the subject sensor is exposed to. If the sensor is mounted on a

tube, place the lead on an Annie A-8 (or equiv.) temperature tester on the same tube near

the sensor and insulate the bulb.

Unplug the sensor and measure the resistance with a good quality ohmmeter (Simpson

260 or equiv.). Read the value as quickly as possible to prevent the meter current from

changing the resistance reading.

Using the chart on the right, locate (as close as possible) the actual sensor temperature.

The measured resistance should be relatively close to the resistance value shown in the

chart.

Example:

Sensor temp. = 19°F.

Measured Resistance = 46K ohms

This sensor is good since the measured value is relatively close to the

chart value.

FLASH RATE INDICATIONS:

TEMP °F RESISTANCE

86 7.85K

81 8.85K

75 10.24K

70 11.59K

65 13.14K

59 15.32K

55 16.93K

50 19.41K

45 22.20K

41 24.76K

36 28.45K

32 31.84K

25 37.50K

19 46.44K

14 53.94K

10 57.64K

5 67.06K

0 78.05K

I -- Flash/Second =

2-- Flashes/Second =

3-- Flashes/Second =

Normal operation.

Fault A (Low AT) i.e.: Inoperative compressor, toss of charge, open ambient sensor, shorted coil sensor.

Fault B (20 defrosts terminated on time)

Fault C (High AT) i.e.: SOV stuck in heating, shorted ambient sensor, open coil sensor, closed TXV,

OD motor failure, OD fan on in defrost, undercharged unit.

4--Flashes/Second = FaultA&CorA&B

For additional information consult Pub. No. 34-1001 Heat Pump Defrost Controls.

Page 16

1. LED off.

DEMAND

SYMPTOMS

2. LED flashing very rapidly (greater

than 4 times/sec) or appears to be on

continuously.

3. Control does not initiate a normal

defrost.

DEFROST CONTROL CHECKOUT

CHECKS

1.24V R-B & Y-B at board, with unit running?

2.Short FRC_DFT pin to TEST_COMMON pin.

Is defrost cycle initiated?

TEST_COMMON pin shorted to TST pin?

OD Temp. below 49°E

OD Coil temp. below 35°F.?

"Delta" T increasing?

1. LED flashing?

2. Check for 24V Y-B at board with unit running.

3. Check sensors for correct mounting

(connection) and resistance.

4. Control does not initiate a forced

defrost.

4. Short FRC_DFT pin to TEST_COMMON pin.

Is defrost cycle initiated?

24V R-B & Y-B at board with unit running?

5. Defrost initiates manually but terminates in less than 10 seconds.

6. Defrost initiates manually but

terminates on time.

7. Defrost initiates on approximately

15/25 minute intervals.

8. Defrost initiates on approximately

30/45 minute intervals.

1. Coil sensor circuit open or reading at a very

high resistance?

2. Does OD fan cycle off in defrost?

3. Windy weather preventing normal

termination?

Be sure OD coil is clean.

1. Coil sensor open or reading a very

high resistance?

2. Ambient sensor reading less than normal?

3. OD fan off in defrost?

1.TEST_COMMON pin shorted to TST pin?

2. Do both sensors check OK?

3. Verify correct system charge.

4. Verify a "forced defrost" terminates less than

15 minutes.

5. OD fan motor off in defrost.

6. Verify proper SOV operation.

Has J1 been cut?

1. B to T greater than 10 volts?

9. OD fan runs during defrost.

10. No SOV delay on defrost

termination.

1.24V R-B at board & 24V Y-B at board?

2. Check protective devices in YO circuit. 24V

YO-B present after 30 seconds.

Check voltage between control terminals 2 and

7,force a defrost cycle. Is 24V present for 30

seconds and 0V thereafter?

11. ODS-A burned out.

YES/NO

12. On SCROLL bearing units,

compressor does not operate.

ACTIONS

Repair low voltage wiring.

Complete Check #2.

Replace defrost control.

LED is bad but control will still function.

Remove short.

Replace defrost control.

Check refrigerant circuits for balanced

distribution of refrigerant if OD coil is

frosting and delta T is not increasing

Refer to SYMPTOM #1.

Complete Check #2.

Repair low voltage wiring.

Complete Check #3.

Remount or replace sensor if necessary.

Replace defrost control.

Y-B signal or control may be intermittent

Repair low voltage wiring.

Replace defrost control.

Replace coil sensor.

Replace defrost control.

Complete Check #2.

Replace coil sensor.

Complete Check #3.

Replace ambient sensor.

Replace defrost control.

Remove short.

Replace defective sensor (Clear coil and

reset Emergency heat light).

Complete SYMPTOM #3.

Adjust as needed.

Replace defrost control.

See SYMPTOM #9.

Replace if necessary.

Replace defrost control.

The soft-switch time is defeated when J1

is cut.

Replace defrost control.

Check low voltage wiring for miswire.

Check for short in low voltage wiring.

Repair low voltage wiring.

Y-B signal or control may be intermittent

13. On SCROLL bearing units, no 30

second off delay at defrost initiation. N Replace defrost control.

Page

MAINTENANCE

ROUTINE MAINTENANCE BY OWNER

You can do some of the periodic maintenance functions for

your WCX-G unit yourself; this includes replacing the dispos-

able or cleaning the permanent air filters, cleaning the unit

cabinet, clearing the condenser coil, and conducting ageneral

unit inspection on a regular basis.

Be sure to inspect them at least once each month when

the system is in constant operation. (In new homes, check

the filters every week for the first four (4) weeks.)

MAINTENANCE PERFORMED BY SERVICEMAN--

HEATING SEASON

Complete the unit inspections and service routines described below

at the beginning of each heating season.

• Visually inspect the unit to ensure that the airflow required for

condenser coil is not obstructed from the unit.

• Inspect the control panel wiring to verify that all electrical

connections are tight and that the wire insulation is intact.

If you have disposable-type filters, replace them with new

filters of the same type and size. Do not attempt to clean

disposable filters.

Permanent-type filters can be cleaned by washing them with

a mild detergent and water. Make sure that the filters are

thoroughly dry before re-installing them in the unit (or duct

system).

NOTE: It may be necessary to replace permanent filters

annually if washing fails to clean the filter or if the filter shows

signs of deterioration. Be sure to use the same type and size

as was originally installed.

CONDENSER COIL

Unfiltered air circulates through the unit's condenser coil and

can cause the coil's surface to become clogged with dust, dirt,

etc. To clean the coil, vertically (i.e., with the fins) stroke the

coil surface with a soft-bristled brush.

Be sure to keep all vegetation away from the condenser coil

area.

MAINTENANCE PERFORMED BY SERVICEMAN--

COOLING SEASON

To keep your unit operating safely and efficiently, the manu-

facturer recommends that a qualified serviceman check the

entire system at least once each year and any other time that

you feel one is needed. Your serviceman should examine

these areas of your WCY-F unit:

• filters (for cleaning or replacement)

• motors and drive system components

• gaskets (for possible replacement)

• safety controls (for mechanical cleaning)

• electrical components and wiring (for possible replacement and

connection tightness)

• condensate drain (for cleaning)

• unit duct connections (to see that they are physically sound and

sealed to the unit casing)

• unit mounting support (for structural integrity)

WARNING: TO PREVENT INJURY OR DEATH

DUE TO ELECTRICAL SHOCK OR CONTACT WITH MOVING

PARTS. LOCK UNIT DISCONNECT SWITCH IN OPEN

POSITION BEFORE SERVICING UNIT.

WARNING: TO PREVENT AN EXPLOS,ON I

OR POSSIBLE INJURY, DEATH AND EQUIPMENT DAMAGE,

DO NOT STORE COMBUSTIBLE MATERIALS, GASOLINEI

OR OTHER FLAMMABLE VAPORS OR LIQUIDS NEAR THEI

UNIT. l

The following warning complies with State of California law, Proposition 65.

WARNING: This product contains

fiberglass wool insulation! Fiberglass dust and ceramic

fibers are believed by the State of California to cause

cancer through inhalation. Glasswool fibers may also

cause respiratory, skin, or eye irritation.

PRECAUTIONARY MEASURES

•Avoid breathing fiberglass dust.

• Use a NIOSH approved dust/mist respirator.

• Avoid contact with the skin or eyes. Wear long-

sleeved, loose-fitting clothing, gloves, and eye

protection.

• Wash clothes separately from other clothing: rinse

washer thoroughly.

Operations such as sawing, blowing, tear-out, and

spraying may generate fiber concentrations requiring

additional respiratory protection. Use the appropriate

NIOSH approved respirator in these situations.

FIRST AID MEASURES

Eye Contact Flush eyes with water to remove dust.

If symptoms persist, seek medical

attention.

Skin Contact Wash affected areas gently with soap

and warm water after handling.

• the unit (for obvious unit deterioration)

Page 18

LiMiTED WARRANTY

HiGH EFFiCiENCY HEAT PUMP

WCZ, WCY AND WCX

Models Less Than 20 Tons for Residential Use*

(Parts Only)

This limited warranty is extended by American Standard Inc., to the original purchaser and to any

succeeding owner of the real property to which the Heat Pump is originally affixed, and applies to

3roducts purchased and retained for use within the U.S.A. and Canada.

If any part of your Heat Pump fails because of a manufacturing defect within five years from the date of

the original purchase, Warrantor will furnish without charge the required replacement part. Any local

transportation, related service labor, diagnosis calls, refrigerant and related items are not included.

In addition, if the sealed motor-compressor(s) fail(s) or the outdoor coil* should become defective, either

or both events occurring because of a manufacturing defect within the sixth through tenth year from the

date of original purchase, Warrantor will furnish without charge the required replacement compressor

and/or outdoor coil. Any local transportation, related service labor, diagnosis calls, refrigerant and

TRANE Package Units(both Units Combined) Manual L0905299

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