CARRIER Package Units(both Units Combined) Manual L0604564

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

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HEATING & COOLING

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50JS, 50JX

3-Phase Single-Packaged Heat Pumps

Installation, Start-Up,

and Service Instructions

NOTE: Read the entire instrdction manual before starting the

installation.

TABLE OF CONTENTS

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

INTRODUCTION .......................................................................... 2

RECEIVING AND INSTALLATION .......................................... 2

Check Equipment ...................................................................... 2

IDENTIFY UNIT ................................................................ 2

INSPECT SIMPMENT ........................................................ 2

Provide Unit Support ................................................................ 2

ROOF CURB ....................................................................... 2

SLAB MOUNT ................................................................... 2

GROUND MOUNT ............................................................ 2

Provide Clearances .................................................................... 2

Rig and Place Unit .................................................................... 2

INSPECTION ...................................................................... 2

INSTALLATION ................................................................ 2

Select and Install Ductwork ..................................................... 4

CONVERTING HORIZONTAL DISCHARGE UNITS TO

DOWNFLOW (VERTICAL) DISCHARGE UNITS ......... 5

Provide for Condensate Disposal ............................................. 7

Install Electrical Connections ................................................... 8

HIGH-VOLTAGE CONNECTIONS ................................ I 0

ROUTING POWER LEADS INTO UNIT ...................... 10

CONNECTING GROUND LEAD TO GROUND LUG.10

ROUTING CONTROL POWER WIRES (24-V) ............ 13

SPECIAL PROCEDURES FOR 208-V OPERATION ...15

PRE-START-UP .......................................................................... 17

START-UP ................................................................................... 17

Check for Refrigerant Leaks .................................................. 17

Start-Up Adjustments .............................................................. 17

CHECKING COOLING AND HEATING

CONTROL OPERATION ................................................. 17

CHECKING AND ADJUSTING REFRIGERANT

CHARGE ........................................................................... 18

REFRIGERANT CHARGE .............................................. 18

NO CHARGE .................................................................... 18

LOW CHARGE COOLING ............................................. 19

TO USE COOLING CHARGING CHARTS .................. 19

INDOOR AIRFLOW AND AIRFLOW ADJUST-

MENTS .............................................................................. I9

MAINTENANCE ......................................................................... 20

Air Filter .................................................................................. 21

Indoor blower and motor ........................................................ 21

OUTDOOR COIL, INDOOR COIL, AND

CONDENSATE DRAIN PAN ............................................... 22

Outdoor fan ............................................................................. 23

Electrical controls and wiring ................................................ 23

Refrigerant circuit ................................................................... 24

Indoor airflow ......................................................................... 25

Metering device ...................................................................... 25

Liquid line strainers ................................................................ 25

C99001

Fig. 1--Model 50JS/50JX

High Flow Valves ................................................................... 25

Time-delay relay ..................................................................... 25

Loss of charge switch ............................................................. 25

Check defrost thermostat ........................................................ 25

Defrost Thermostat ................................................................. 25

TROUBLESHOOTING ............................................................... 25

START-UP CHECKLIST ............................................................ 25

NOTE TO INSTALLER -- READ THESE INSTRUCTIONS

CAREFULLY AND COMPLETELY before installing this unit.

Also, make sure the Owner's Manual and Service Instructions are

left with the unit after installation.

SAFETY CONSIDERATIONS

Installation and servicing of air-conditioning equipmem can be

hazardous due to system pressure and electrical components. Only

trained and qualified personnel should install, repair, or service

air-conditioning equipment.

Untrained personnel can perform ba._ic maintenance functions of

cleaning coils and filters. All other operations should be performed

by trained service personnel. When working on air-conditioning

equipment, observe precautions in the literature, tags, and labels

attached to the unit, and other safety precautions that may apply.

Follow all safety codes. Wear safety glasses and work gloves. Use

quenching cloth for unbrazing operations. Have fire extinguisher

available for all brazing operations.

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations,

PC 101 Printed in U.S.A. Catalog No. 50JS,JX-6SI Pg 1 2-06 New

Replaces:

Improper installation, adjustment, alteration, service, mainte-

nance, or use can cause explosion, fire, electric shock, or

other occurrences, which could cause serious injury or death

or damage your property. Consult a qualified installer or

service agency for information or assistance. The qualified

installer or agency must use only factory-authorized kits or

accessories when modifying this product.

Recognize safety information. This is the safety-aler_ symbolAx.

When you see this symbol on the product or in instructions or

manuals, be alert to the potential for personal injury.

Understand the signal words -- DANGER, WARNING, CAU-

TION, and NOTE. Danger identifies the most serious hazards,

which will result in severe personal injury or death. Warning

indicates a condition that could cause serious personal injury or

death. Caution is used to identify unsafe practices, which would

result in minor personal injury or product and property damage.

NOTE is used to highlight suggestions which will result in

enhanced installation, reliability, or operation.

1. The power supply (volts, phase, and hertz) must correspond to

that specified on unit rating plate.

2. The electrical supply provided by die utility must be sufficient

to handle load imposed by this unit.

3. This installation must confurm with local building codes and

with NEC (National Electrical Code). Refer to provincial and

local plumbing or waste water codes and other applicable local

codes.

severe inJUry or death.

INTRODUCTION

The 50JS and 50JX heat pumps are fully self-contained and

designed for outdoor installation (See Fig. 1). Standard units are

shipped in a horizontal-discharge configuration for installation on

a ground-level slab, Units can be converted to downflow (vertical)

discharge configurations for rooftop applications.

RECEIVING AND INSTALLATION

Step 1--Check Equipment

IDENTIFY UNIT

The unit model number and serial number are stamped on the unit

identification plate. Check this information against shipping pa-

pers.

INSPECT SHIPMENT

Inspect for shipping damage while unit is still on shipping pallet.

If ualt appears to be damaged or is torn loose from its anchorage,

have it examined by transportation inspectors before removal.

Forward claim papers directly to transportation company. Manu-

facturer is not responsible for any damage incurred in transit.

Check all items against shipping list. Immediately notify the

nearest Carder Air Conditioning office if any item is missing. To

prevent loss or damage, leave all parts in original packages until

installation.

Step 2--Provide Unit Support

ROOF CURB

Install accessory roof curb in accordance with instructions shipped

with curb (See Fig. 5). Install insulation, cant strips, roofing, and

flashing. Ductwork must be attached to curb.

IMPORTANT: The gasketing of the unit to the roof curb is critical

for a watertight seal. Install gaskeling material supplied with the

roof curb. Improperly applied gasketing also can result in air leaks

and poor unit performance.

Curb should be level to within 1/4 in. (See Fig. 6). This is

necessary for unit drain to function properly. Refer to accessory

roof curb installation instructions for additional information a-s

required.

SLAB MOUNT

Place the unit on a solid, level concrete pad that is a minimum of

4 in. thick with 2 in. above grade (See Fig. 7). The slab should

extend approximately 2 in. beyond the casing on all 4 sides of the

unit. Do not secure the unit to the slab except when required by

local codes.

GROUND MOUNT

The unit may be installed either on a slab or placed directly on the

ground if local codes permit. Place the unit on level ground

prepared with gravel for condensate discharge.

Step 3---Provide Clearances

The required minimum service clearances are shown in Figs. 2 and

3. Adequate ventilation and ouUloor air must be provided. The

outdoor fan draws air through the outdoor coil and discharges it

through the top fan grille. Be sure that the fan discharge does not

recirculate to the outdoor coil. Do not locate the unit in either a

corner or under an overhead obstruction. The minimum clearance

under a partial overhang (such as a normal house overhang) is 36

in. above the unit top. The maximum horizontal extension of a

partial overhang must not exceed 48 in. For extended overhangs,

provide a minimum clearance of 48 in.

IMPORTANT: Do not restrict outdoor airflow. An air restriction

at either the outdoor-air inlet or die fan discharge may be

detrimental to compressor life.

Do not place the unit where water, ice, or snow from an overhang

or roof will damage or flood the unit. Do not install the unit on

carpeting or other combustible materials. Slab-mounted units

should be at least 4 in. above the highest expected water and runoff

levels. Do not use unit if it has been under water.

Step 4--Rig and Place Unit

Rigging and handling of this equipment can be hazardous for many

reasons due to the installation location (roofs, elevated structures,

etc.)

Only trained, qualified crane operators and ground support staff

should handle and install this equipment.

When working with this equipment, observe precautions in the

literature, on tags, stickers, and labels attached to the equipment,

and any other safety precautions that might apply.

Follow all applicable safety codes. Wear safety shoes and work

gloves.

INSPECTION

Prior to initial use, and at monthly intervals, all rigging brackets

and straps should be visually inspected for any damage, evidence

of wear, structural deformation, or cracks, particular attention

should be paid to excessive wear at hoist hooking points and load

support areas. Brackets or straps showing any kind of wear in these

areas must not be used and should be discarded.

INSTALLATION

1. Remove unit from shipping carton. Leave top shipping skid on

the unit as a spreader bar to prevent the rigging straps from

damaging the unit. If the wood skid is not available, use a

spreader bar of sufficient length to protect unit from damage.

/_[V_P0eAT0e C01t

t TOP VIEW

_lllllllllllllllllll_

HIIIIIIIIIIIII!lllml_

iUPPL_

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[_5 8_1 OPEW_WG, , . OpEwiWG

t3 ,s_ REAR VIEW

FEG_J_) a_-iilLll/iC_S Ti_ C{Ji_'I]HUE W._'ia- _ _ ROR _l_fl /€_ _

WILLIWETER$ {IN) MILLtM[TER_ { INI

FOP OF UNIT ................................... 355¸6 {14.00} [VAp COIL ACC[$$ $1D[ ..................... 9_4.0 [3_ 001

DU¢1 S_O[ OF UNIT ............................. 50 8 [2 00} P_[_ [HIR_ $rD[ .......................... 9_4 0 [3_ 001

_ID[ OPPOSIT[ OUCTS............................ _55.6 (1_ 00} ([ICEPT FOR HEC R[OUIREWEWTS}

BOTTOll OF _iHI1 ............................... 121 {0.50) uHrT TOp ............................. 914.0 [3_ 001

ELECTRIC H_AT PANEL .......................... _14 4 [3_ 001 SID[ OPPO_IT[ DLiCIS ...................... _;4.0 {3_.001

_U_T PAN[L .......................................... 304¸8 [1_.00]_

M_., U CLF.AdUdiC_ W_LLIW[T[RS [IN] ,_IHIHUW DISTAHC[S:_F _HIT IS PLACID LESS THAH _Od8 [1_ 0_1 FR{_,dWALL

BETWEEH UNITS, POI[R [#TRf SI{)[ ....................... _065 8[_ 00) $_STEW,TH[N S_ST[W PERFORWAHC[ WkYBE ¢_PROWIS[D.

UHIT kWD UN_ROUNO[_ SURF_C[$, pO,ie[R [NIRY SlOE .... 91_ 0 {35 00]

UWIT _WD BLOCK Oe _Oe_:R[TE WALL_ AHD OI_ER

GROUNDEDSURFAC_S, POi[R[RTR_51D[ .............. _066.814_.00] DIMENSIONS [N [] ARE IN INCHES

UNIT

50JS03O

50JS036

50JS042

50JXO30

50JX036

. • , , .

Iit

FRONT VIEW

,I,Ll l!llllll

IL_3]_

RIGHT SIDE VIEW

ELECTRICAL CHARACTERISTICS

208/230-3-60

208/230-3-60, 460-3-60

263/230-3-60

208/230-3-60, 460-3-66

UNIT WEIGHT UNiT HEIGHT

IN. (MM)

Ib kg "A"

287 130.2 39.02 (991.1)

291 132.0 37.02 (940.3)

323 146.5 37.02 (940.3)

320 145.2 37.02 (940.3)

328 148.8 37.02 (940.3)

19.5 (495.3)

19.7 (500.4)

19,7 (500.4)

19.7 (500.4)

Fig. 2--50JS030-O42/50JX030-036 Unit Dimensions

CENTER OF GRAVITY

IN.(MM)

13,7 (348.0)

13.7 (348.0)

14.0 (355.6)

C00137

15.0 (381.o)

13,0(330.2)

13.0 (330.2)

17.6 (447.0)

16.5 (419.1)

2. Position the lifting bracket assembly around the ba._e of the

unit. Be sure the strap does not twist.

3. Place each of the 4 metal tiffing brackets into the rigging holds

in the composite pan.

4. Thread lifting bracket strapping around bottom perimeter of

unit as follows:

a. Open lever of tension buckle (ratchet type).

b. Feed strapping through tension buckle as shown in Fig. 8.

c. Pull strapping through tension buckle unit taut.

d. Snap lever down to lock strap in tension buckle. To release

strapping, squeeze safety latch, lift lever, and pull webbing

outward.

5. Tighten the tension buckle until it is taut. Lifting brackets

must be secure in the rigging holds.

6. Attach field-supptied clevis or hook of sufficient strength to

hole in the tiffing bracket (See Fig. 8).

7. Attach the 2 safety strops directly to the clevis or hook at the

4 rigging brackets. DO NOT attach the safety straps to the

tiffing brackets (See Fig. 8).

8. Position lifting point directly over the unit's center of gravity.

9. Lift unit. When unit is directly over the roof curb, remove the

2 safety straps. Lower the equipment onto the roof curb.

Step S--Select and Install Ductwork

The design and installation of the duct system must be in

accordance with the standards of the NFPA for installation of

/TOP VIEW

FdmLIFS) CLF.ARANC_$ TO _IM_TL

MELLIM[T[RS [[g]

TOP OF UNIT ........................................ 35S.6 [14 00]

DUCT $1D[ OF UNIT ................................... S08 [Z 00]

SIO_ OPPOSIIE DUCTS ......................... 355 6 [14 00]

80TIll Or I_ 7• [0 S01

ELECTRIC _[k7 PkNEL ........................ 914¸4 (3_C0]

MEC. REGUFa) C_JOUNCEI

MILLIMETERS {IK]

BETWE[N UNITS, POM[R [RTR? SII)[ ................ J066.8 [42 00]

Ugll kND IINGROUND[D SUBFkC[S. POiER [NTRy SJ[JE ........ 914.0 [3G 01_]

UNII kND BL_ OR CO_RETE WkLLS kND OTN[R

61tOUNOED $UItFkC[S. pOW[It ENTRY SI_[ ............... 10668 [_2 00]

JllllllllJllllllll

lll!lllllllllllllII

_UPPL_ " , . NETUNN

402 rm[NlUG

[15 _3]

I I I

--34_3 _

REAR VIEW

FIEaLIR_D _FOR _'noN _

MILLIMETERS {IN]

EVAP. COIL ACC[S$ SlOE ............................ 9140 [36001

POiE_ [NTEY SID[ ................................. 914_ [360_}

I[X_PI FOR gEC REOUIR[_[NTS}

SI_E OPFOSIT£ DUCIS ................. 914¸0 [3600]

_ll_T pkNEL ....................... 304¸8 [1_00]*

IMIRIMUW DISIANC[_IF UNI[ I_ PLAC[O LESS fNkN 304 8 [12 00] FBO_ WALL

SY$1EM.IN[N $_$T[N p[R_OENkNC[ N_O[ _OgPgOMIS[O.

DIM[NSIONS IN [] A_E IW INC_[S

UNIT

5_S_8

5_S_0

5_X_2

5_X_8

5_X_0

ittttttft ttl t,

tttttttlt{ttt{l.

=i=, _' i_--_ =_

lilt I _ii_,

LEFT SIDE

[41 00)

i ililllllliillllltti

,!llllll!l, llllltlill

'_"i" .i'

VIEW ,_ ........... FRONT VIEW

PONE_E_IN_

184 6

[4 81]

Jllllltllllllllllh

IIjIIIIIIIIII IlU

•

RIGHT SIDE VIEW

ELECTRICAL CHARACTERISTICS

208/230-3-60, 460-3-60

208/230-3-60, 468-3-60

208/230-3-60,460-3-60

UNIT WEIGHT UNIT HEIGHT

IN. (MM)

Ib kg "A"

353 160.1 38.96 (990.2)

418 189.6 38.98 (990.2)

350 158.8 40.98 (1040.9)

315 170.1 40.98 (1040.9)

428 194.1 42.98 (1091.7)

19.9 (505.5)

19.9 (505,5)

19.9 (505.6)

19.9 (505.5)

CEWrER OF GRAVITY

IN. (MM)

15.7 (398.8)

15.7 (398.6)

C00136

17.0 (431.8)

16.6 (421.6)

18.0 (457.2)

17.6 (447,0)

Fig. 3---50JS048-060/50JX042-060 Unit Dimensions

tt_

4X3

CORNER WEIGHTS (SMALL CABINET)

Unit 30 36 42

Total Weight 287 291 323

Corner Weight 1 66 67 83

Corner Weight 254 55 55

Corner Weight 3 62 63 78

Corner Weight 4 105 106 107

CORNER WEIGHTS (LARGE CABINET)

Unit 48 60

Total Weight 353 418

Corner Weight 1 76 90

Corner Weight 2 49 58

Corner Weight 3 96 114

Corner Weight 4 132 156

G00071

CORNER WEIGHTS (SMALL CABINET)

Unit 30 36 --

Total Weight 320 328 --

Corner Weight 1 63 64 --

Corner Weight 2 74 76 --

Corner Weight 356 58 --

Corner Weight 4 127 130 --

-- "D

CORNER WEIGHTS (LARGE CABINET)

Unit 42 48 60

Total Weight 350 375 428

Corner Weight 1 75 81 92

Corner Weight 2 49 52 60

Corner Weight 3 95 102 116

Corner Weight 4 131 140 160

Fig. 4_Corner Weights (in Pounds)

non-residence type air conditioning and ventilating systems, NFPA

90A or residence type, NFPA 90B and/or local codes and

ordinances.

Select and size ductwork, supply-air registers, and return air grilles

according to ASHRAE (American Society of Heating, Refrigera-

tion, and Air Conditioning Engineers) recommendations.

The unit has duct flanges on the supply- and return-air openings on

the side of the unit.

When designing and installing ductwork, consider die following:

For vertical supply and return units, tools or parts could drop

into ductwork and cause serious injury or death. Install a 90

degree turn in the return ductwork between the unit and the

conditioned space. If a 90 degree elbow cannot be installed,

then a grille of sufficient strength and density should be

installed to prevent objects from falling into the conditioned

space. Units with electric heaters require 90 degree elbow in

supply duct.

I. All units should have field-supplied filters or accessory falter

rack installed in the return-air side of the unit. Recommended

sizes for filters are shown in Tables 1 and 2.

2. Avoid abrupt duct size increases and reductions. Abrupt

change in duct size adversely affects air performance.

IMPORTANT: Use flexible connectors between ductwork and

unit to prevent transmission of vibration. Use suitable gaskets to

ensure weather tight and airtight seal. When electric heat is

installed, use fireproof canvas (or similar heat resistant material)

connector between ductwork and unit discharge connection. If

flexible duct is used, insert a sheet metal sleeve inside duct. Heat

resistant duct connector (or sheet metal sleeve) must extend 24-in.

from electric heater element.

3. Size ductwork for cooling air quantity (cfm). The minimum

air quantity for proper electric heater operation is listed in

Tables 3 and 4. Heater limit switches may trip at air quantities

below those recommended.

4. Seal, insulate, and weatherproof all external ductwork. Seal,

insulate and cover with a vapor barrier all ductwork passing

through conditioned spaces. Follow latest Sheet Metal and Air

Conditioning Contractors National Association (SMACNA)

and Air Conditioning Contractors Association (ACCA) mini-

mum installation standards for residential hearing and air

conditioning systems.

5. Secure all ducts to building structure. Flash, weatherproof, and

vibration-isolate duct openings in wall or roof according to

good construction practices.

VACunit

/ou .a.

Wood nailer*

Rashing field •

I_:11 _¢ Insulation(field

field supplied -- --

Duct work

Cant strip field supplied

field supplied

Roof Curb for Small Cabinet

Note A:When unit mounting screw is used

retainer bracket must also be used.

Roof Curb for Large Cabinet

Note A:When unit mounting screw is used

retainer bracket must also be used.

SUpp opening

IBx_

Returnopemng

(exc)

UNIT SIZE

50JS030-042 50JX030-036

50JS048-060 50JX042-060

Long

\R/A

Insulated

deck pan

_-Gasket around

duct

Gasket around

outer edge _

S/A

ODS CATALOG NUMBER

CPRFCURBO06AO0

CPRFCURBOO7AO0

CPRFCURB008AO0

CPRFCURB069A00

NOTES:

1. Roof curb must be set up for unit being installed.

2. Seal strip must be applied, as required, to unit being installed.

3. Dimensions in ( ) are in millimeters.

4. Roof curb is made of 16-gauge steel.

5. Table lists only the dimensions, per pad number, that have changed.

6. Attach ductworb to curb (flanges of duct rest on curb).

7. Insulated panels: 1-in. thick fiberglass 1Ib density.

8. Dimensions are in inches.

IN.(MM)

6(203)

14 (356)

8 (203)

14 (356)

C00076

BCD

IN. (MM) IN. (MM) IN. (MM)

11(279) 151/2 (419) 28-3/4 (730)

11(279) 161/2 (419) 28-3/4 (730)

16 3/16 (411) 17 3/8 (441) 40-1/4 (1022)

9. When unit mounting screw is used (see Note A), a retainer bracket must be used as well. This bracket must also be used when required by code for hurricane or

seismic conditions. This bracket is available through Micrometl.

Fig. 5_Roof Curb Dimensions

MAXIMUM ALLOWABLE

DIFFERENCE(in.)

A-B A-c

1/4 1'4

Fig. 6--Unit Leveling Tolerances

C99065

EVAR COIL COND. COrL

C99096

Fig. 7--Slab Mounting Detail

CONVERTING HORIZONTAL DISCHARGE UNITS TO

DOWNFLOW (VERTICAL) DISCHARGE UNITS

Before performing service or maintenance operations on

system, turn off main power to unit and install lockout tag.

Turn off accessory heater power switch if applicable. Elec-

trical shock could cause serious injury or death.

1. Open all electrical disconnects and install lockout tag before

starting any service work.

2. Remove side duct covers to access bottom return and supply

knock outs.

NOTE: These panels are held in place with tabs similar to an

electrical knockout.

3. U_ a ,screwdriver and hammer to remove the panels in the

bottom of the composite unit base.

4. Ensure the side duct covers are in place to block off the

horizontal air openings.

NOTE: Avoid abrupt duct size increases and reductions. Abrupt

change in duct size adversely affects air performance.

Step 6--Provide for Condensate Disposal

NOTE: Ensure that condensate-water disposal methods comply

with local codes, restrictions, and practices.

The units dispose of condensate through a 3/4 in. NPT female

fitting that exits on the compressor end of the unit. Condensate

water can be drained directly onto the roof in rooftop installations

(where permitted) or onto a gravel apron in ground level installa-

tions. Install a field-supplied condensate trap at end of condensate

connection to ensure proper drainage. Make sure that the outlet of

the trap is at lea_st 1 in. lower than the drain-pan condensate

connection to prevent the pan from overflowing. Prime the trap

with water. When using a gravel apron, make sure it slopes away

from the unit.

If the installation requires draining the condensate water away

from the unit, install afield-supplied 2-in. trap at the condensate

connection to ensure proper drainage. Condensate trap is available

as an accessory or is field-supplied. Make sure that the outlet of the

trap is at learnt I in. lower than the unit drain-pan condensate

connection to prevent the pan from overflowing. Connect a drain

trough using a minimum of field-supplied 3/4 -in. PVC or

field-supplied 3/4 -in. copper pipe at outlet end of the 2 -in. trap

(See Fig. 11). Do not undersize the tube. Pitch the drain trough

downward at aslope of at least 1 in. every l0 ft. of horizontal run.

Be sure to check the drain trough for leaks. Prime the trap at the

beginning of the cooling season start-up.

UNIT SIZE

NOMINAL CAPACITY (ton)

OPERATING WEIGHT (lb.)

COMPRESSOR QUANTITY

TYPE

REFRIGERANT

REFRIGERANT METERING DEVICE

Refrigerant (R-22) Quantity (lb.)

ORIFICE ID (in.)

ORIFICE OD (in.)

OUTDOOR COIL

Rows... Fins/in.

Face Area (sq, ft.)

OUTDOOR FAN

Nominal Airflow (CFM)

Diameter

Motor HP (RPM)

INDOOR COIL

Rows... Fins/in.

Face Area (sq. ft,)

INDOOR BLOWER

Nominal Airflow (CFM)

Size (in.)

Motor HP (RPM)

RETURN-AIR FILTERS (in.)

throwaway

Table 1--Physical Data

50JS03O 50JS036

2-1/2 3

287 291

RECIPROCATING COMPRESSOR

50JS042 50JS048 5OJS060

4 5

353 418

SCROLL COMPRESSOR

3-1/2

323

R-22

AccuRater_

8.0

0.078

0.052 (2)

2.,.17

10.3

2400

1/8 (825)

4...15

3.7

1250

11X10

3/4 (1075)

7,85 9.3

0.088 0.093

0.057 (2) 0.061 (2)

2...17 2...17

11.6 11.6

3300 3300

22 22

1/4 (1100) 1/4 (1100)

3...18 4,..15

4.7 4.7

1600 2000

11XI0 11X10

3/4 (1075) 1 (1100)

24X30X1 24X30X1

5.6 7.6

0.068 0.078

0.042 (2) 0.046 (2)

1...17 2,,.17

12.0 10.3

2400 2800

22 22

1/8 (825) 1/4 (1100)

3-.15 3...15

3.7 3.7

1000 1200

10X10 11X10

1/4 (1075) 1/2 (1075)

20X20X1 20X24X1 24X30X1

UNIT SIZE

NOMINAL CAPACITY (ton)

OPERATING WEIGHT (lb.)

COMPRESSOR QUANTITY

TYPE

REFRIGERANT

REFRIGERANT METERING DEVICE

Refrigerant (R-22) Quantity (lb.)

ORIFICE ID (in.)

ORIFICE OD (in.)

OUTDOOR COIL

Rows... Fins/in.

Face Area (sq, ft,)

OUTDOOR FAN

Nominal Airflow (CFM)

Diameter

Motor HP (RPM)

INDOOR COIL

Rows... Fins/in.

Face Area (sq. ft.)

INDOOR BLOWER

Nominal Airflow (CFM)

Size (in.)

Motor HP (RPM)

RETURN-AIR FILTERS (in.)

throwaway

Table 2--Physical Data

50JX030

2-1/2

32O

6.4

0.073

0.043 (2)

2...17

10.3

2350

1/8(825)

3...15

3.7

50JX036 50JX042

3 3-1/2

328 350

SCROLL COMPRESSOR

R-22

AccuRater_

7.0 10.8

0.076 0.080

0.040 (2) 0.052 (2)

2...17 2...17

10.3 13.7

2800 2800

22 22

114 (1100) 1/8 (825)

4...15 4...15

3.7 4.7

1200 1400

10X10 11X10

1/2 (1075) 1/2 (1075)

20X24X1 24X30X1

50JX048

375

10.1

0.088

01057 (2)

2...17

13.7

3300

1_ (1100)

4._15

4.7

50JX060

428

12.3

0.093

0.063 (2)

2..,17

15.7

3300

1/4 (1100)

4...15

5.7

1000 1450 1750

10X10 11X10 11X10

1/4 (1075) 1/2 (1075) 1(1040)

20X20X1 24X30Xl 24X30X1

NOTE;Air filter pressuredropfor non-standardfiriersmustnotexceed 0.08 in. wg.

Table 3_Minimum Airflow for Reliable Electric Heater Operation (Cfm)

SIZE 50JS030 50JS036 50JS042 50JS048 50JS06O

AIRFLOW (CFM) 1000" 1200 1400 1600 2000

* The 030 siZemodels mustbe runon mediumor highspeedwhen usedinconiunctionwith 15 kwelectric heataccessory

Table 4---Minimum Airflow for Reliable Electric Heater Operation (Cfm)

SIZE 50JX03O 50JX036 50JX042 50JX048

AIR FLOW (C FM) 13O0" 1200 1400 1600

• The 030 size models mustbe runon mediumorhighspeedwhenusedin conjunctionwith 15 kwelectricheataccessory

50JX060

2000

DETAIL A

(

SEEDETAILA_'

UNIT

Size

50JS030

50JS036

50JS042

50JS048

50JS060

50JXO30

50JX036

50JX042

50JX048

50JX060

MAXIMUM WEIGHT

(INCLUDES SHIPPING SKID)

3O9

313

345

375

440

342

350

372

377

45O

140.2

142,0

156.4

170.1

199.6

155.2

159.8

168.8

171.0

204.2

Fig. &--Suggested

In.

19.5

20.5

19.5

20.0

21.O

20.0

21.0

Rigging

Mm. In.

495.3 17,50

495.3 17.75

520.7 20.62

495.3 19.75

508 19,25

508 19.0

533.4 20.5

508 21.25

533.4 20.0

A05179

in3.

444.5

450.9

523.8

501.7

489

482.6

520.7

539.8

508,0

Fig. 9_Typical Installation

C00139

Horizontal Duct Covers c99030

Fig. 10--50JX with Duct Covers On

(Unit Shown with Optional Louvered Grille)

Failure to follow these precautions could result in damage to

the unit being installed:

1. Make all electrical connections in accordance with NEC

ANSI/NFPA (latest edition) and local electrical codes

governing such wiring. In Canada, all electrical connec-

tions must be in accordance with CSA standard C22.1

Canadian Electrical Code Part I and applicable local

codes. Refer to unit wiring diagram.

2. Use only copper conductor for connections between

field-supplied electrical disconnect switch mad unit. DO

NOT USE ALUMINUM WIRE.

3. Be sure that high-voltage power to unit is within operating

voltage range indicated on unit rating plate. On all 3-phase

units, ensure phases are balanced within 2 percent. Consult

local power company for correction of improper voltage

and/or phase imbalance.

4. Insulate low-voltage wires for lfighest voltage contained

within conduit when low-voltage control wires are in same

conduit as high-voltage wires.

5. Do not damage internal components when drilling through

any panel to mount electrical hardware, conduit, etc.

1" (25ram) MIN.

HIGH-VOLTAGE CONNECTIONS

TRAP

OUTLET _ The unit must have a separate electrical service with a field-

_F'_ --""""7 T supplied, waterproof disconnect switch mounted at, or within sight

from the unit. Refer to the unit rating plate, NEC and local codes

2" 50mm) MIN .

]-or maximum fuse/c rcu breaker size and minimum circuit amps

j_ (ampacity) for wire sizing (See Tables 5 and 6 for electrical data).

C99013 The field-supplied disconnect may be mounted on the unit over the

Fig. 11--Condensate Trap

Step 7--Install Electrical Connections

¥!_ |','l:%q_,1I_

The unit cabinet must have an uninterrupted, unbroken

electrical ground to minimize the possibility of personal

injury if an electrical fault should occur. This ground may

consist of an electrical wire connected to the unit ground lug

in the control compartment, or conduit approved for electrical

ground when installed in accordance with NEC, ANSI/NFPA=

American National Standards Institute/National Fire Protec-

tion Association (latest edition) (in Canada, Canadian Elec-

trical Code CSA C22.l) and local electrical codes. Failure to

adhere to this warning could result in serious injury or death.

high-voltage inlet hole (See Fig. 2 and 3).

If the unit has an electric heater, a second disconnect may be

required. Consult the Installation, Start-Up, and Service Instruc-

tions provided with the accessory for electrical service connec-

tions.

Operation of unit on improper line voltage constitutes abuse and

may cause unit damage that could affect warranty.

ROUTING POWER LEADS INTO UNIT

Use only copper wire between disconnect and unit. The high-

voltage leads should be in a conduit until they enter the duct panel;

conduit termination at the duct panel must be watertight. Run the

high-voltage leads through the power entry knockout on the power

entry side panel. See Fig. 2 and 3 for location and size. When the

leads are inside the unit, pJn leads up the high-voltage raceway to

the line wiring splice box (See Fig. 12-17). On all 3-phase units,

connect the leads to the black, yellow, and blue wires (See Fig.

16).

CONNECTING GROUND LEAD TO GROUND LUG

Connect the ground lead to the chassis using the ground lug in the

wiring splice box (See Fig. 16).

ROUTING CONTROL POWER WIRES (24-V)

Form a drip-hiop with the thermostat leads before routing them

into the unit. Route the thermostat leads through grommeted,

low-voltage hole provided in unit into unit control power splice

box (See Fig. 2 and 3). Connect thermostat leads to unit control

power leads as shown in Fig. 15.

The unit transformer supplies 24-v power for complete system

including accessory electrical heater. An automatic-reset circuit

breaker (See Fig. 17) is provided in die 24-v circuit; see the caution

label on the transformer or Fig. 18. Transformer is factory wired

for 230-v operation. If supply voltage is 208-v, rewire transformer

primary as described in Special Procedures for 208-v Operation

section.

UNIT 50JS

SIZE

O3O

036

O42

048

O60

Table 5_Electrical Data--50JS

VOLTAGE

RANGE

_PH-HZ

MIN MAX

208/230-340 187 253

208/230-3-80 187 253

460-3-60 414 506

COMPRESSOR

RLA LRA

9.9 78

9.9

5.5 40

208/230-3-60 187 253 12.4 90

460-3_60 414 506 6.7 45

208/230_3_0 187 253 14,1 105

460-3-50 414 506 7.1 53

208/230-,3-60 187 253 19.4 125

ELECTRIC HEAT

OFM IFM

FLA FLA Nominal

kW* FLA

-/- -/-

3.8/5.0 10.4/12 .0

0.9 2.0 7.5/10,0 20.8/24,1

11,3/15.0 31.3/36.1

./. -/-

3.8/5.0 10,4/12,0

1.5 4.1 7.5/10.0 31.3/36.1

11,3/15.0 36.1/41.7

./. -/-

66.0

0,8 1.9 10 12.0

15 16.0

./. -/-

3.8/5,0 10.4/12.0

0.9 3.8 7.5/10.0 20.8/24.1

11.3/15.0 31.3/36.1

15.0/19.9 41.6/48.0

-/- ./o

5 6.0

0.8 1.8 10 12.0

15 18.0

20.0 24.1

./. ./.

3.8/5.0 10.4/12.0

1.5 3,5 7.5/10.0 20.8/24.1

11.3/15.0 31.3/36.1

15.0/20.0 41.6/48.0

-/- .

5 6,0

0.8 1.8 10 12.0

15 18.0

26 24.1

-/- -/-

3.3/5.0 10.4/12.0

1.5 5,2 7,5/10.0 20.8/24.1

11,3/15,0 31,3/36.1

15.0/19.9 41.6/48.0

-/- °

5 6.0

0.8 3.2 10 12.0

15 18.0

20 24,1

MCA FUSE OR

CKT BKR

15.3/15.3 20/20

28.3/30.3 30/35

41.3/45.3 45/50

54.4/60.4 60/-

18.0/18.0 25/25

31.0/33.0 35/35

44.0/48.0 45/50

57.1/63.1 60/-

9.6 15

17.1 20

24.6 25

32.1 35

20.2/20.2 25/25

33.2/35.2 40/40

46.3/50.3 50/60

59.5/65.3 60/-

72.2/80.2

11.0 15

18.5 20

26.0 30

33.5 35

41.0 45

22.6/22.6 30/30

35.7/37.7 40/40

48.7/52.7 50/60

61,7/67.7

74.6/82,6

11.5 15

19,0 20

26.5 30

34.0 35

41.5 45

32.0/32.0 40/40

45.0/47.0 50/50

58.0/62.1

71.1/77.1

83.9/91.9

14.0 20

21.5 25

29.0 30

36.6 40

44.1 45

460_._-80 414 506 8.0 63

SINGLE POINT POWER SUPPLY

MOCP

-/70

80/90

7o o

80/90

60/70

80/80

90/100

Table 6--Electrical Data--50JX

UNIT 5OJX

SIZE

O30

036

042

048

O60

V-PH-HZ

208/230-3--60

208/230_60

460-:_60

208/230-3_0

460-3_0

208/230-3-60

460_3_0

208/230_3_30

460-3_0

VOLTAGE

RANGE COMPRESSOR OFM IFM

FLA FLA

MIN MAX RLA LRA

187 253 10.4 63 0.9 2,1

187' 253 11.2 75 1.6 3.6

414 506 5.4 37.5 0.9 1.9

187 253 12.4 88 0.9 4.1

414 506 5.8 44 0.9 2.9

187 253 13.0 93 1.6 4.1

414 506 6.4 46.5 0.9 2.0

187 253 17.3 123 1.4 6.2

414 506 9.0 62 0.9 3.2

ELECTRIC HEAT SINGLE POINT POWER SUPPLY

Nominal kW* FLA MCA

-/- -/- 16.0/16.0

3.8/5.0 10.4/12.0 29.0/31.0

7.5/10.0 20.8/24.1 42.1/46.1

11.3/15.0 31.3/36.1 55.1/61,1

-/- -/- 19.2119.2

3.8/5.0 10.4/12.0 32.0/34.2

7.5/10.0 36.1/41.7 45.2/49.3

11.3/15.0 31.3/36.1 58.3/64.3

-/- 4- 9.6

56 17.1

10 12 24.6

15 18 32.1

-/- -/- 20.5/20.5

3.8/5.0 10.4/12.0 33,5/35.5

7.5/10,9 29.8/24.1 46.6/50.6

11.0/15.0 31.0/36.1 59.6/65.6

15.0/20.0 41.6/48.0 72,5/80.5

-/- -/- 10.2

5 6 17.7

10 12 25.2

15 18 32.7

20 24.1 40.2

-/- 4- 21.9/21.9

3.6/5.0 10.4/12.0 34.9/36.9

7.5/10,0 20.8/24.1 47.9/51.9

11.3/15,0 31.3/36.1 60.9/67.0

15.0/20.0 41.5/48.0 73.8/81.8

4- -/- 10.8

5 6 18.3

10 12 25.8

15 18 33.3

20 24.1 40.8

-/- -/- 29.2/29.2

3.8/5.9 10.4/12,0 42.3/44.3

7.5/10.0 20.6/24.1 55,2/59.4

11.3/15.0 31.3/36.1 68.3/74.3

15.9/19.9 41.6/48.0 81.2/89.2

-/- -/- 15.4

5 6 22.9

10 12 30.4

15 18 37.9

20 24.1 45.4

FUSE OR

CKT BKR

20/20

35/35

45/50

25/25

35/35

50/50

25/25

40/40

59/60

30/30

40/40

50/60

35/35

50/50

60/60

MOCP

60/70

80/90

70/70

80/90

70i80

90/90

fII_L_IELO _1 _L E-

-- ,,EL

i_ SUPPLY

--WI2I 8LU

EOUIP.GNO

USED WITH _I_-- -_" - !

ACCCSSORV

ELECT.EkI --I__

OPTION ONLY BL

I-

US£1) WITH

N[AT[R OPTIONSN Pmm_H' _ L

060) I • _ lO HIR

MAXWIldE2Ai(G i '___= _

(50 Ak(P FOE 15 KI_ ) W128 BLK--

IFUI 3 /_ 5) TO

US 0 IVT I _HI_

ACCESSORY _ Iuz MI i_ BLK--

LCI Hkl I 30,kMPSB _

OPTION ON Y _ TO

USED WIIH _ GO AMP S8HTR

HEATER OPTIONS _YEL--

15 KW [024 060) _ 30 kWP SB _ i

19 9 KW (042 0601 I_

i _euect BLU--

(20 K W SHOV_,_} TRANI

3 2 AMP

MA,UAL RESEl_ C_,.,-_

F AUTO S

_;.PPLT._uPL.E_- = _

tW2--

rlEL_ THERMO_IAT I

SEE NOTE#2

I--

-RED

VEL

_)6 GRN

NIT RED

-------_18 YE_

_19 ORN

_20 WHT

_131 pN_

_y2 WHI

_'130 VIO

_133 GRA_

SEE NOTE 15_

R -- C)ll

_21BRN---

_12o BRN

2(V SPLICE BOX

[CONNECT BLU RED SPED

L -- FOR 50JX030 ONLY)

GRN-YEL_26 GRN YEL_

GEN-YEL GRN-y[[

WIT BR_

_ i_ _

_70 5RN--

HRI 2 3 _ _ [20 KWI_

UNIT COWPONENI ARRANGEWENT

iouI_ F_N

_SECIIOU

,_r_ost

rl{Lo S_LIC( _H_ _BJUST_BL(W_*_ _NT_I_I_

ru fUS{

O_W OUt_ r_ _tO_

IDN (L)k r_I _EOUEN¢[

CLOSES OENS

T_T

II iZ _ SDa%04_'O_OSOJS04_I 0_I

FOI IIII_

!50JS5OOOOG(? 0

GO(

Fig. 12--Wiring Schematics (208/230-3-60)

134

_AXIMU_ WIR[ _ _ FIEL_ il BLK

SIZE 2 AWG -- _2 YEL--_ /

- _,. _o_

[OUIP _ND

ACCESSORY

ELECT HEAT

OPTION ONLY --

HEATER OPTIDNS Y[L

5,10,15 _ _0 KW

WAXWIR [ _ g_

AWG L-L_--BE

c m 50-1BVIATIC

TEL-- CApZ YEL OFM

--W16 GRN

_25 GRN YEL_?6 GRN-YEL_

GRN Y[L GRN YEL

_z #

UNIT COMPONENT ARRANGEMENT

SEE NOTE

PLI-I

Te_ (I _

[WEmOIZED DE-ENEe_Ep

_D _ILI_ COWpRES_ORDELay

F:_

J[ou_e

_F_OS _ _W_ _m llW[D[L_ ffL*_

_O_W_ _ffs_I iF_ m IM{OlI_,_L II_[_F_m=Is.[__( e[eL_:E_

Fig. 13--Wiring Schematics (460-3-60)

150JS500007170

C00135

EXAMPLE: Supply voltage is 460-3-60.

LEGEND C US ,, o o AB=452v

(_ BC = 464 v

FLA -- Full Load Amps AC = 455 v

LRA -- Locked Rotor Amps Average Voltage = 452 + 464 + 455

MCA -- Minimum Circuit Amps 3

MOCP -- Maximum Overcurrent Protection

RLA -- Rated Load Amps = 1371

CKT BKR -- Circuit Breaker 3

= 457

NOTES:

1. In compliance with NEC (National Electrical Code) requirements

for muitimotor and combination load equipment (refer to NEC

Articles 430 and 440), the overcurrent protective device for the

unit shall be Power Supply fuse. Canadian units may be

fuse or circuit breaker.

2. Minimum wire size is based on 60 C copper wire. If other than

60 C wire is used, or if length exceeds wire length in table,

determine size from NEC.

3. Unbalanced 3-Phase Supply Voltage

Never operate a motor where a phase tmbalance in supply volt-

age is greater than 2%, Use the following formula to determine

the percentage of voltage imbalance.

%Voltage imbalance

= 100 x max voltage deviation from average voltage

average voltage

Determine maximum deviation from average voltage.

(AB) 457 452=5v

(BC) 464 457=7v

(AC) 457 455=2v

Maximum deviation is 7 v.

Determine percent of voltage imbalance.

% Voltage Imbalance = 100 x 7

457

= 1.53%

This amount of phase imbalance is satisfactory as it is below the

maximum allowable 2%.

IMPORTAN]_ If the supply voltage phase imbalance is]

more than 2%, contact your local electric utility company/

immediately. /

C99024

Fig. 1€--Electrical Data Legend

Q---

THERMOSTAT

AND SUBBASE

L.-- _.__ BRN_-

----L---- o.N-

_ RED --

_GRN--

UNIT CONTROL POWER

SPLICE BOX

C99056

Fig. 15---Control Connections

SINGLE-PHASE

CONNECTIONS

TO DISCONNECT

PER NEC

3-PHASE

CONNECTIONS

LEGEND

NEC - National Ele_rical Code

- - - Field Wiring

_ Splice Conne_ions

GROUND LUG

IN SLPICEBOX)

GROUND

"L_AS--_

L1 _BLK--

L2 ........ _YEL--

L3 ........ _C_-"-BLU --

NOTE: Use copper wire only.

Fig. 16---Line Power Connections

C99057

24 V Circuit Breaker

Fig. 17--Control Wiring Plate

TRANSFORMER CONTAINS A MANUAL

RESET OVERCURRENT PROTECTOR

IT WILL NOT AUTOMATICALLY RESET

DISCONNECT POWER AND INSTALL

LOCKOUT TAG PRIOR TO SERVICING

THIS COMPARTMENT MUST BE CLOSED

EXCEPT WHEN SERVICING

C99070

C99058

Fig. 18_Transformer Label

SPECIAL PROCEDURES FOR 208-V OPERATION

1. Disconnect the yellow primary lead from the transformer. See

unit wiring label (See Fig. 12).

2. Connect the yellow primary lead to the transformer terminal

labeled 200-v.

Indoor blower-motor speeds may need to be changed for 208-v

operation. Refer to indoor airflow and airflow adjustments section.

PRE-START-UP

Failure to observe the following warnings could result in

serious personal injury or death:

1. Follow recognized safety practices and wear protective

goggles when checking or servicing refrigerant system.

2. Do not operate compressor or provide any electric power to

unit unless compressor terminal cover is in place and

secured.

3. Do not remove compressor terminal cover until all electri-

cal sources are disconnected and tagged.

4. Relieve and recover all refrigerant from system before

touching or disturbing anything inside terminal box if

refrigerant leak is suspected around compressor terminals.

5. Never attempt to repair soldered connection while refrig-

erant system is under pressure.

6. Do not use torch to remove any component. System

contains oil and refrigerant under pressure.

To remove a component, wear protective goggles and

proceed as follows:

a. Shut off electrical power to unit and install lockout tag.

b. Relieve and reclaim all refrigerant from system using

both high- and low-pressure ports.

c. Cut component connecting tubing with tubing cutter and

remove component from unit.

d. Carehiliy unsweat remaining tubing stubs when neces-

sary. Oil can ignite when exposed to torch flame.

Use the Start-Up Checklist supplied at the end of this book and

proceed as follows to inspect and prepare the unit for initial

start-up:

1. Remove access panel.

2. Read and follow instructions on all DANGER, WARNING,

CAUTION, and INFORMATION labels attached to, or

shipped with, unit.

3. Make the following inspections:

a. Inspect for shipping and handling damages such as broken

lines, loose parts, disconnected wires, etc.

b. Inspect for oil at all refrigerant tubing connections and on

unit base. Detecting oil generally indicates a refrigerant

leak. Leak-test all refrigerant tubing connections using

electronic leak detector, or liquid-soap solution. If a refrig-

erant leak is detected, see following Check for Refrigerant

Leaks section.

c. Inspect all field and factory-wiring connections. Be sure

that connections are completed and tight.

d. Ensure wires do not touch refrigerant tubing or sharp

sbeetmetal edges.

e. Inspect coil fins. If damaged during shipping and handling,

carefully straighten Pms with a fin comb.

4. Verify the following conditions:

a. Make sure that outdoor-fan blade is correctly positioned in

fan orifice (See Fig. 19).

b. Make sure that condensate drain pan and trap are filled

with water to ensure proper drainage.

c. Make sure that all tools and miscellaneous loose parts have

been removed.

5. Compressors are internally spring mounted. Do not loosen or

remove compressor holddown bolts.

6. Each unit system has 2 Schrader-type port.s, one low-side

Schrader fitting located on the suction line, and one high-side

Schrader fitting located on the compressor discharge line. Be

sure that caps on the ports are tight.

7. High flow valves are located on the compressor hot gas and

suction tubes. These valves can not be accessed for service in

the field. Ensure the plastic caps axe in place and tight or the

possibility or refrigerant leakage could occur.

MOTORAND FANHUB MOTORSHAFT

C99009

Fig. 19_Fan Blade Clearance

START-UP

Using the Start-Up Checklist supplied at the end of this book,

proceed as follows:

Step 1--Check for Refrigerant Leaks

Locate and repair refrigerant leaks and charge the unit as follows:

I. Use both high- and low-pressure ports to relieve system

pressure and reclaim remaining refrigerant.

2. Repair leak following accepted practices.

NOTE: Instal] a bi-fhiw filter drier whenever the system has been

opened for repair.

3. Check system for leaks using an approved method.

4. Reclaim refrigerant and evacuate refrigerant system to 500

microns if no additional leaks are found.

5. Charge unit with R-22 refrigerant, using a volumetric-

charging cylinder or accurate scale. Refer to unit rating plate

for required charge. Be sure to add extra refrigerant to

compensate for internal volume of filter drier.

Step 2---Start-Up Adjustments

Complete the required procedures given in the Pre-Start-Up

section before starting the unit. Do not jumper any safety devices

when operating the unit. Do not operate the unit in Cooling mode

when the outdoor temperature is below 40 ° F (unless accessory

low-ambient kit is installed). Do not rapid-cycle the compressor.

Allow 5 minute between "on" cycles to prevent compressor

damage.

CHECKING COOLING AND HEATING

CONTROL OPERATION

Start and check the unit for proper control operation as follows:

I. Place room thermostat SYSTEM switch in OFF position.

Observe that blower motor starts when FAN switch is placed

in ON position and shuts down within 60 sec. when FAN

switch is placed in AUTO position.

2. Place SYSTEM switch in COOL position and FAN switch in

AUTO position. Set control below room temperature. Observe

that cooling cycle shuts down when control setting is satisfied.

Bypass

Position

_rF

OUTDOOR COIL

LEGEND

HPS - High Pressure Switch

LCS - Loss of Charge Switch

_j_ Accurater e Metering Device

] Arrow indicates direction of flow

Metering

Position

LCS

Fig. 20--Typical Heat Pump Operation, Heating Mode

OUTDOOR

LEGEND

HPS - High Pressure Switch

LCS -Loss of Charge Switch

"_ Accurate# Metering Device

] Arrow indicates direction of flow

Bypa_

Pos_ion

Metering

Position

LCS

INDOOR COIL

C00095

Fig. 21--Typical Heat Pump Operation, Cooling Mode

C00096

3. Place system switch in HEAT position. Set control above

room temperature. Observe that compressor, outdoor fan, and

indoor blower motors start. Observe that heating cycle shuts

down when control setting is satisfied.

4. When using an automatic changeover room thermostat, place

both SYSTEM and FAN switches in AUTO positions. Ob-

serve that unit operates in Cooling mode when temperature

control is set to "call for Cooling" (below room temperature),

and unit operates in Heating mode when temperature control

is set to "call for Heating" (above room temperature).

IMPORTANT: Three-phase, scroll compressors are direction ori-

ented. Unit must be checked to ensure proper compressor 3-phase

power lead orientation. If not corrected within 5 minute, the

internal protector will shut off the compressor. The 3-phase power

leads to the unit must be reversed to correct rotation. When turning

backwards, scroll compressors emit elevated noise levels, and the

difference between compressor suction and discharge pressures

may be dramatically lower than normal.

CHECKING AND ADJUSTING REFRIGERANT CHARGE

The refrigerant system is fully charged with R-22 refrigerant and

is tested and factory sealed. Allow system to operate a minimum

of 15 minutes before checking or adjusting charge.

NOTE: Adjustment of the refrigerant charge is not required

unless the unit is suspected of not having the proper R-22 charge.

The charging label and the tables shown refer to system tempera-

tures and pressures in cooling mode only. Arefrigerant charging

label is attached to the outside of the service access door. If charge

level is suspect in Heating mode, reclaim all refrigerant and charge

to nameplate amount. (This information may be obtained from the

physical data table also.)

IMPORTANT: When evaluating the refrigerant charge, an indi-

cated adjustment to the specified factory charge must always be

very minimal. If a substantial adjustment is indicated, an abnormal

condition exists somewhere in the cooling system, such as insuf-

ficient airflow across either coil or both coils.

Balance Point Worksheet

m_ ,0

:z:o_ 30

_._ 20

-10 0 10 17 20 30 40 47 50

OutdoorAir Temp (Deg F)

Fig. 22--50JX Balance Point Worksheet

C00093 Rev 2

REFRIGERANT CHARGE

The amount of refrigerant charge is Listed on the unit nameplate

and/or the physical data table. Refer to the Refrigeration Service

Techniques Manual, Refrigerants Section.

¥_ [__.'luhnl[.]H

NO CHARGE

Check for leak. Use standard evacuating techniques. ARer evacu-

ating system to 500 microns, weigh in the specified amount of

refrigerant (refer to system data plate).

LOW CHARGE COOLING

Use Cooling Charging Charts (Fig. 24-33). Vary refrigerant until

the conditions of the chart are met. Note that charging charts are

different from type normally used. Charts are based on charging

the units to correct superheat for the various operating conditions.

Accurate pressure gauge and temperature _nsnig devices are

required. Connect the pressure gauge to the service port on the

suction line. Mount the temperature sensing device on the suction

line and insulate it so that the outdoor ambient does not affect the

reading. Indoor air CFM must be within the normal operating

range of the unit.

TO USE COOLING CHARGING CHARTS

Take the outdoor ambient temperature and read the suction

pressure gauge. Refer to the chart to determine what the suction

temperature should be.

NOTE: If the problem causing the inaccurate readings is a

refrigerant leak, refer to Check for Refrigerant Leaks section.

INDOOR AIRFLOW AND AIRFLOW ADJUSTMENTS

For heating and cooling operation, the recommended airflow

is 350 to 450 cfm for each 12,000 Btuh of rated cooling

capacity. For units with optional electric heat, the airflow

must not be reduced below the levels stated in Tables 3 and

4. Failure to maintain these airflows could result in damage to

the unit.

Tables 7 and 8 shows both heating and cooling airflows at various

external static pressures. Refer to these tables to determine the

airflow for the system being installed.

NOTE: Be sure that all supply-and return-air grilles are open, free

from obstructions, and adjusted properly.

Airflow can be changed by changing the lead connection of the

blower motor.

Unit 50JS and 50JX three-speed motors (except 50JX 030) are

factory wired for low speed operation. Unit 50JX 030 is factory

wired for medium speed.

For 2081230-v Motors:-- The motor leads are color-coded as

follows:

3-SPEED

Black = high speed

Blue = medium speed

Red =low speed

To change the speed of the indoor fan motor (IFM), remove die fan

motor speed leg lead from the Time Delay Relay (TDR). This wire

is attacbed to TDR-3 for 3-phase units. To change the speed,

remove and replace with lead for desired blower motor speed.

ln,Tulate the removed lead to avoid contact with chassis parts.

Balance Point Worksheet

ca 50

...__ 40

_q:3

ca_

_E 2o

Based on Indoor Entering Air of 70 F and Rated CFM

-10 0 10 17 20 30

Outdoor Air Temp (Deg F)

Fig. 23_50JS Balance Point Worksheet

47 50 6O

C00094rev2

For 460-v GE Motors_The motor leads are color coded as

follows:

3-SPEED

Black = high

Violet = jumper

Orange = medium

Red = low

To change die speed of the indoor fan motor (IFM), remove fan

motor speed lead from the Time Delay Relay (TDR) and replace

with the lead for the desired blower motor speed. The motor speed

lead is attached to terminal TDR-3. For low and medium speeds,

black must be connected to the jumper wire. Insulate removed lead

end to avoid contact with chassis parts. To select high speed on

460-v GE motors, separate die black female quick connect (QC)

from the jumper lead male quick connect (QC) and connect the

black lead to the BR. Insulate the jumper to avoid contact with any

chassis parts.

MAINTENANCE

To ensure continuing high performance, and to minimize the

possibility of premature equipment failure, periodic maintenance

must be performed on tiffs equipment. This heat pump unit should

be inspected at least once each year by a qualified service person.

To troubleshoot unit, refer to Table 11.

NOTE TO EQUIPMENT OWNER: Consult your local dealer

about the availability of a maintenance contract.

The ability to properly perform maintenance on this equip-

ment requires certain expertise, mechanical skills, tools and

equipment. If you do not possess these, do not attempt to

perform any maintenance on this equipment, other than those

procedures recommended in the User's Manual. FAILURE

TO HEED THIS WARNING COULD RESULT IN SERI-

OUS INJURY OR DEATH AND POSSIBLE DAMAGE TO

THIS EQUIPMENT.

Failure to follow these warnings could result in serious injury

or death:

I. Turn off electrical power to die unit and install lockout tag

before performing any maintenance or service on this unit.

2. Use extreme caution when removing panels and parts. As

with any mechanical equipment, personal injury can result

from sharp edges.

3. Never place anything combustible either on, or in contact

with, the unit.

ing when servicing.

The minimum maintenance requirements for this equipment are _.s

follows:

Table 7--Wet Coil Air Delivery

Unit 50JS 030-060 (Deduct 10 percent for 208-V)*

UNIT

MOTOR EXTERNAL STATIC PRESSURE (IN. WG)

SPEED 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7

Watts 295 292 289

Low Cfm 928 882 802

WaRs 388 383 377 372 366 361

Med Cfm 1203 1120 1062 1004 930 838

W_ts 469 458 449 442

High Cfm 1141 1027 924 828

W_ts 592 581 567 552 538 525 512 499

Low Cfm 1499 1421 1351 1281 1207 1125 1034 936

Watts 660 636 617 603 592

Med Cfm 1475 1371 1274 1186 1105

WaRs 776 761 744

High Cfm 1452 1356 1254

WaRs 606 596 586 575 563 550 537

Low Cfm 1464 1399 1341 1282 1218 1146 1066

WaRs 680 665 649 635 622 611 600 590

Med Cfm 1608 1535 1461 1387 1316 1247 1180 1111

Watts 768 755 742 730 718 797 596 684

High Cfm 1656 1576 1508 1447 1396 1331 1268 1198

WaRs 741 724 709 690 664 631 594 562

Low Cfm 1994 1937 1869 1797 1722 1645 1566 1480

WaRs 773 744 715 667 662

Med Cfm 1957 1867 1787 1719 1653

WaRs 799 782 773

High Cfm 1914 1842 1774

WaRs 742 723 698 666 629 591 559 540

Low Cfm 2197 2141 2103 2057 1988 1894 1783 1674

W_ts 838 822 803 760 752 721 689 661

Med Cfm 2485 2406 2269 2127 2012 1937 1894 1855

WaRs 934 913 691 666 837 806 776

High Cfm 2483 2391 2283 2170 2061 1960 1868

0.8 0.9 1.0

581 566

1024 i 928

725 ] 706

1145 ] 1030

671 1

1119 I

552 543

1384 1269

640 625

1575 1463

756 704

1686 1538

[

639 632

1770 ] 1571

750 [735

1780 i 1687

689

910

* Air delivery values are based on operating voltage of 230_v or 460-v, wet coil, withoutfilter or electric heater. Deduct filter and electric heater pressure drops to obtain

static pressure available for ducting.

NOTES:

1. Do not operate the unit at a cooling airflow that is less than 350 cfm for each 12,000 Btuh of rated cooling capacity. Evaporator coilfrosting may occur at airflows below

this point.

2. Dashes indicate podions of table that are beyond the blower motor capacity or are not recommended.

3. Deduct 10 percent for 208-v.

1. Inspect air filter(s) each month. Clean or replace when

necessary.

2. Inspect indoor coil, drain pan, and condensate drain each

cooling season for cleanliness. Clean when necessary.

3. Inspect blower motor and wheel for cleanliness each cooling

season. Clean when necessary.

4. Check electrical connections for tightness and controls for

proper operation each cooling season. Service when neces-

sary.

5. Ensure wires are not contacting refrigerant tubing or sha_

sheet metal edges.

Step 1--Air Filter

IMPORTANT: Never operate the unit without a suitable air filter

in the return-air duct system. Always replace the fiker with the

same dimensional size and type a_soriginally installed (See Tables

I and 2 for recommended fdter sizes.)

Inspect air filter(s) at least once each month and replace

(throwaway-type) or clean (cleanable-type) at lea.st twice during

each cooling season or whenever the f-alterbecomes clogged with

dust and tint.

Step 2--Indoor blower and motor

NOTE: All motors are prelubricated. Do not attempt to lubricate

these motors.

For longer life, operating economy, and continuing efficiency,

clean accumulated dirt and grease from the blower wheel and

motor annually.

Disconnect and tag electrical power to the unit before

cleaning and lubricating the blower motor and wheel. Failure

to adhere to this warning could cause serious injury or death.

Step 3--OUTDOOR COIL, INDOOR COIL, AND

CONDENSATE DRAIN PAN

Inspect the condenser coil, evaporator coil, and condensate drain

pan at least once each heating and cooling season or sooner if

conditions require.

The coils are easily cleaned when dry; therefore, inspect and dean

the coils either before or after each cooling season. Remove all

obstructions, including weeds and shrubs, that interfere with the

airflow through the condenser coil.

Table 8_Wet Coil Air Delivery

Unit 50JX 030-060 (Deduct 10 percent for 208-V)*

UNIT

MOTOR EXTERNAL STATIC PRESSURE (IN. WG)

SPEED 0.O 0.1 0.2 0.3 0.4 0.5 0.6 0.7

Watts 276 276 272

Low Cfm 963 929 781

Watts 375 377 371 362 354 350

Med Cfm 1202 1170 1079 976 884 807

Wa_s 469 449 435 428

High Cfm 1174 988 828 718

WaHs 462 451 431 411 394 381

Low Cfm 1374 1290 1205 1116 1020 916

Watts 523 506 499 471 449 426

Med Cfm 1500 1408 1301 1190 1082 977

Watts 645 628 610 595 584 575

High Cfm 1474 1369 1267 1169 1069 962

Watts 620 600 586 574 562 548 530 510

Low Cfm 1662 1621 1581 1540 1496 1447 1392 1331

Wa_s 686 661 634 606

Med Cfm 1722 1662 1594 1515

WaHs 757

High Cfm 1669

WaSs 620 600 586 574 562 548 530

Low Cfm 1662 1621 1581 1540 1496 1447 1392 1331

Watts 763 747 729 709 686 661 634 606

Med Cfm 1917 1868 1822 1774 1722 1662 1594 1515

Wa_s I 852 832 809 784 757

High Cfm I 1982 1914 1839 1757 1669

Watts 597 592 578 526 460 452 445

Low Cfm 2265 2190 2101 2033 1974 1869 1614

Watts 754 730 707 687 671 658 646 630

Med Cfm 2383 2282 2202 2134 2070 2005 1935 1858

Wa_s 901 876 856 836 813 785 755 723

High Cfm 2480 2383 2301 2233 2175 2122 2066 1998

0.8 0.9 1.0

487 462 439

1263 1186 1103

577 547 517

1427 1330 1227

730 704 682

1577 1486 1402

487

1263

577 547 517

1427 1330 1227

730 704 682

1577 1486 1402

603 558 486

1771 1667 1576

696 681 687

1910 1788 1619

* Air delivery values are based on operating voltage of 230-v or 460-v, wet coil, without filter or elect nc heater. Deduct filter and electdc heater pressure drops to obtain

static pressure available for ducting.

NOTES:

1. Do not operate the unit at a cooling airflow that is less than 350 cfm for each 12,000 Btuh of rated cooling capacity. Evaporator coil frosting may occur at airflows below

this point.

2. Dashes indicate portions of table that are beyond the blower motor capacity or are not recommended.

3. Deduct 10 percent for 208-v.

Straighten bent fins with a fin comb. If coated with dirt or lint,

clean the coils with a vacuum cleaner, using the soft brush

attachment. Be careful not to bend the fins. If coated with oil or

grease, clean the coils with a mild detergent-and-water solution.

Rinse coils with clear water, using a garden hose. Be careful not to

splash water on motors, insulation, wiring, or air filter(s). For best

result.s, spray condenser coil fins from inside to outside the unit.

On units with an outer and inner condenser coil, be sure to clean

between the coils. Be sure to flush ail dirt and debris from the unit

base.

Inspect the drain pan and condensate drain line when inspecting

the coils. Clean the drain pan and condensate drain by removing all

foreign matter from the pan. Flush the pan and drain trough with

clear water. Do not splash water on the insulation, motor, wiring,

or air filter(s). If the drain trough is restricted, clear it with a

"plumbers snake" or similar probe device. Ensure that the auxiliary

drain port above the drain trough is also clear.

Step 4---Outdoor fan

1. Inspect the fan blades for cracks or bends.

2. If fan needs to be removed, remove screws holding outdoor air

intake grille and remove grille.

3. Loosen the setscrew and slide the fan off the motor shaft.

4. When replacing fan blade, position blade so that die hub is 1/8

in. (See Fig. 19) away from the motor end (1/8 in. of motor

shaft will be visible) .

5. Ensure that setscrew engages the flat area on the motor shaft

when tightening.

6. Replace grille.

Step f--Electrical controls and wiring

Inspect and check the electrical controls and wiring annually. Be

sure to turn off the electrical power to the unit and install lockout

tag.

(030) 60HZ CHARGING CHART FC

125 52

115 46

105 41

95 35

85 29

75 24

65 18

55 13

45 7

200 30.0 400 50.0 60.0 700 80.0

,SUCTIONL,NETEMPERATURE_T r

-7 -1 410 16 21 27

SUCTION LIN ETEMPERATURE (°C) 50JS500089

C00028

Fig. 24_Cooling Charging Chart, 50JSO30

(036) 60HZ CHARGING CHART

20.0 30.0 40.0 50.0 60.0 70.0 B0.0

SUCTION LINE TEMPERATURE I°Fq

] ...... J I I I

-7 -1 4 10 16 21 27

SUCTION LINE TEMPERATURE (_C) 50JS500090

Fig. 25_Cooling Charging Chart, 50JS 036 uncial_ 29

Remove access panel to locate all the electrical controls and

wiring. Check all electrical connections for tightness. Tighten all

screw connections. If any smoky or burned connections are

noticed, disassemble the connection, clean all the parts, restrip the

wire end and reassemble the connection properly and securely.

After inspecting the electrical controls and wiring, replace all the

panels. Start the unit, and observe at lea_st one complete cooling

cycle to ensure proper operation. If discrepancies are observed in

operating cycle, or if a suspected malfunction has occurred, check

each electrical component with the proper electrical instrumenta-

tion. Refer to the unit wiring label when making these checkouts.

NOTE: Refer to the Sequence of Operation section as an aid in

determining proper control operation.

Step 6---Rsfrigerant circuit

Inspect all refrigerant tubing connections and the unit base for oil

accumulation annually. Detecting oil generally indicates a refrig-

erant leak.

YT_'_L3,zP211]_

System under pressure. Relieve pressure and recover all

refrigerant before system repair or final unit disposal to avoid

serious injury or death. Use all service ports and open all

flow-control devices, including solenoid valves.

If oil is detected or if low performance is suspected, leak-test all

refrigerant tubing using an electronic leak detector, or liquid-soap

solution. If a refrigerant leak is detected, refer to Check for

Refrigerant Leaks section.

If no refrigerant leaks are found and low performance is suspected,

refer to Checking and Adjusting Refrigerant Charge section.

Step 7--1ndoor airflow

The indoor airflow does not require checking unless improper

performance is suspected. If a problem exists, be sure that all

supply- and return-air grilles are open and free from obstructior_;,

and that the air filter is clean. When necessary, refer to Indoor

Airflow and Airflow AdjustmenL_ section to check the system

airflow.

Step 8--Metering device

Refrigerant metering devices are fixed orifices and are located in

the inlet header to the indoor and outdoor coils.

Step 9_Liquid line strainers

The liquid line strainers (to protect metering devices) are made of

wire mesh and are located in the liquid lines on the inlet side of the

metering devices.

Step 10_High Flow Valves

High flow valves are located on the compressor hot gas and

suction tubes. Large black plastic caps distinguish these valves

with O-rings located inside the caps. These valves can not be

accessed for service in the field. Ensure the plastic caps are in

place and tight or the possibility of refrigerant leakage could occur.

Step 11--Time-delay relay

The Time-Delay Relay (TDR) is a solid-state control, recycle

delay timer which keeps indoor blower operating for 60 sec. after

thermostat is satisfied. This delay enables blower to remove

residual cooling in coil after compression shutdown, thereby

improving efficiency of system. The sequence of operation is that

on closure of wall thermostat and at end of a fixed on delay of 1

sec., fan relay is energized. When thermostat is satisfied, an off

delay is initiated. When fixed delay of 60_+5 sec. is completed, fan

relay is de-energized and fan motor stops. If wall thermostat closes

during this delay, TDR is reset and fan relay remains energized.

TDR is a 24-v device that operates within a range of 15-v to 30-v

and draws about 0.5 amps. If the blower runs continuously instead

of cycling off when the fan switch is set on AUTO, the TDR is

probably defective and must be replaced.

Step 12--4.oss of charge switch

The loss of charge switch is located on the outdoor liquid line. This

switch contains a Schrader core depressor. This switch opens at 7

psig and closes at 22 psig. No adjustment is necessary.

NOTE: Because these switches are attached to refrigeration

system under pressure, it is not advisable to remove this device for

troubleshooting unless you are re;_onably certain that a problem

exists. If switch must be removed, remove and recover all system

6891 100

(042.) 60HZ CHARGING CHART

125 52

115 46 I

105 41 I

95 35 I

8s 29 I

7s 241

65 18 I

55 131

45 71

(048) 60HZ CHARGING CHART

,4Jq J.

-4.._

lU)

[

3°° ,oo ,o.o 8o.0 i

SUCTION LiNE TEMPERATURE (°F_

-7 -1 410 16 21 27

SUCTION LINE TEMPERATURE (°C) 50JS50009

Fig. 26--Cooling Charging Chart, 50JS 042 unC_l_°3°

207!

i i i i i

I : I I I

I ! i I I I

I!111

II III

I I I : I

Illil

20.0 300 400 500 61_0

SUCTION LIN E TEMPERATURE !_F)

I!I I I

_7 -1 410 16

SUCTION LINE TEMPERATU RE (°C)

70.o so.o J

! i i

21 27 I

50JS5000921

Fig. 27--Cooling Charging Chad, 50JS 048 Un_=_31

(D60) 60HZ CHARGING CHART

20.0 30.0 400 80.0

SUC_ONL_ETEMPERATURE°_(

I I I I ! J I

7 1 4 10 16 21 27

Fig. 28--Cooling Charging

charge so that pressure gauges read 0 psi. Never open system

without breaking vacuum with dry nitrogen.

Step 13_Check defrost thermostat

There is a liquid header with a brass distributor and feeder tube

going into outdoor coil. At the end of I of the feeder tubes, there

is a 3/8-in. OD stub tube approximately 3 in. long (See Fig. 35).

The defrost thermostat should be located on this stub tube. Note

that there is only 1 stub tube used with liquid header, and on most

units it is the bottom circuit.

Step 14--Defrost Thermostat

Defrost thermostat signals heat pump that conditions are right for

defrost or that conditions have changed to terminate defrost. It is

Chart, 50JS 060 UnCi_=_32

a thermally actuated switch clamped to outdoor coil to sense its

temperature. Normal temperature range is closed at 30 ° +/- 3°F

and open at 80° +/- 5°F.

NOTE: The defrost thermostat must be located on the liquid side

of the outdoor coil on the bottom circuit and as close to the coil as

possible.

TROUBLESHOOTING

Refer to the Cooling and Heating Troubleshooting Chart (Table

11) for troubleshooting information.

START-UP CHECKLIST

Use the Start-Up Checklist to ensure proper start-up procedures are

followed.

Fig. 29_Cooling Charging Chart, 50JX 030 Un_tl_32

Fig. 30_Cooling Charging Chart, 50JX 036 Un_ 33

II......_)_=_=_=_

,I i ;

4 io *_

_x_o_23

C99035

Fig, 32--Cooling Charging Chart, 50JX 048 Units

ill _ ............

C99036

Fig. 33_Cooling Charging Chart, 50JX 060 Units

Table 9---FILTER PRESSURE DROP (In. wg)

FILTER SIZE CFM

500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300

20X20X1 0.05 0.07 0.08 0.10 0.12 0.13 0,14 0.15

20 X 24 X 1 0.09 0.10 0.11 0.13 0.14 0.15 0.16

24 X 30 X 1 0,07 0.08 0,09 0,10 0,11 0.12 0,13 0.14 0.15 0.16 0,17 0,18

Table 10_ELECTRIC HEAT PRESSURE DROP TABLE

Small Cabinet

STATIC CFM

500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600

5 kW 0.O0 0.O0 0.00 0.00 0.00 0.00 0.00 0.00 0.02 0.04 0.06 0.07

10 kW 0,00 0.00 0,00 0,00 0,00 0.02 0,04 0,06 0.07 0.09 0.10 0.11

15 kW 0,00 0.00 0,00 0.02 0,04 0,06 0.08 0,10 0.12 0,14 0.16 0,18

20 kW 0.00 0.00 0.02 0.04 0,06 0,08 0,09 0,11 I 0,13 0.15 0.17 0.10

STATIC

5 kW

10 kW

15 kW

20 kW

1100 1200 1300 1400 1500

0.00 0.00 0.0O 0.01 0.02

0.00 0,00 0.01 0,02 0.03

0.00 0.02 0.03 0,04 0,05

0.02 0,03 0.04 0,05 0.06

Large Cabinet

CFM

1600 1700 1800 1900 2000 2100 2200 2300 2400 2500

0.03 0.04 0.05 0.06 0.07 0.09 0.09 0.10 0.11 0,12

0.04 0.05 0.06 0.07 0.08 0.09 0.10 0.11 0.12 0.13

0.06 0.07 0.08 0.09 0.10 0.11 0.12 0.13 0.14 0.15

0.07 0.08 0.09 0.10 0.11 0.12 0.13 0.14 0.15 0.16

DEFROST

THERMOSTAT

Fig. 35---Defrost Thermostat C99092

Fig. 34_Refrigerant Circuit C99097

SYMPTOM

Compressor and outdoor

fan will not start

Compressor will not start

but condenser fan runs

Table 11--Cooling and Heating Troubleshooting Chart

CAUSE

Power Failure

Fuse blown or circuit breaker tripped

Defective thermostat, contractor, transformer,

control relay or detrost board

Insufficient line voltage

Incorrect or faulty wiring

Thermostat setting too high

Units have a 5-minute time delay

Faulty wiring or loose connections in compressor

circuit

Compressor motor burned out, seized, or

internal overload open

Defective run capacitor, overfoad, or PTC

(positive temperature coefficient) thermistor

Defective run capacitor, overload, or PTC (positive temperature co-

efficient) thermistor

REMEDY

Call power company

Replace fuse or reset circuit breaker

Replace component

Determine cause and correct

Check wiring diagram and rewire correctly

Lower thermostat setting below room

temperature

DO NOT bypass this compressor time

delay-waft for 5 minute until time,delay relay is

de-energized

Check wiring and repair or replace

Determine cause.

Replace compressor

Determine cause and replace

Replace f,Jse or reset circuit breaker

Determine cause

One leg of 3-phase power dead

Three-phase scroll compressor (size 030- Scrst] compressor is rotating in the wrong Correct the direction of rotation by reversing the

060 units) makes excessive noise, and direction 3-phase power leads to the unit

there may be a low pressure differential

Compressor cycles

(other than normally satisfying thermostat)

Compressor operates continuously

Excessive head pressure

Refrigerant overcharge or undercharge

Dateetive compressor

Insufficient line voltage

Blocked outdoor coft

Defective run/start capacitor, ovedoad or start

relay

Defective thermostat

Faulty outdoor-fan motor or capacitor

Damaged reversing valve

Restriction in refggerant system

Dirty air filter

Unit undersized for load

Thermostat set too low

Low refrigerant charge

Leaking valves in compressor

Frosted coil with incorrect defrost operation

Air in system

Outdoor coil didy or restricted

Dirty air tiger

Dirty indoor or outdoor coil

Refrigerant overcharged

Air in system

(Heat) Indoor air restricte_ or recirculating

indoor or outdoor air restdcted or air short_ycling

Low refrigerant charge

Compressor valves leaking

Restriction in liquid tube

(Heat) Outdoor coft frosted

Compressor valves leaking

Reversing valve hung up or leaking intemafty

Head pressure too low

Excessive suction pressure

(Continued next page)

Recover refrigerant, evacuate system, and

recharge to capacities shown on nameplate

Replace and determine cause

Determine cause and correct

Determine cause and replace

Replace thermostat

Replace

Determine cause and correct

Locate restriction and remove

Replace filter

Decrease load or increase unit size

Reset thermostat

Locate leak, repair, and recharge

Replace compressor

Check defrost time settings

Reset as necessary

Check defrost temperature switch

Replace as necessary

Recover refrigerant, evacuate system,

and recharge

Clean coil or remove restdcgon

Replace filter

Clean coil

Recover excess refrigerant

Recover refrigerant, evacuate system,

and recharge

Determine cause and correct

Check for leaks, repair and recharge

Replace compressor

Remove restriction

Move timer on control board to 30 minute between

defrost cycles

Check for source and eliminate

Replace compressor

Replace valve

Recover excess refrigerant

Table 11--Cooling and Heating Troubleshooting Chart (Cont'd)

SYMPTOM CAUSE

Suction pressure too low

Compressor runs but outdoor fan does not

IFM* does not run

IFM* runs when it should be off

IFM* operaSon is intermittent

*IFM4ndoor Fan Motor

(Cool) Dirty air filter

(Heat) Outdoor coil frosted

Low refrigerant charge

Metering device or low side restricted

(Cool) Insufficient coil airflow

(Cool) Temperature too low in conditioned area

(Cool) Outdoor ambient below 40 °F

Field-installed filter-drier restricted

NC (normally closed) contacts on defrost beard

open

Blower wheel not secured to shaft

insufficient voltage at motor

Power connectors not properly sea{ed

Motor programmed with a delay profile

With thermostat in off state, the voltage on G,

Y1,Y, Y2, W with respect to common, should be

1/2 of actual low voltage supply

Water ddpping into motor

Connectors not firmly sealed

REMEDY

RepIace filter

Move timer on control board to 30 minute

between defrost cycles

Check for leaks, repair and reCharge

Remove source of restriction

Increase air quantity

Check filter-replace if necessary

Beset thermostat

Install Iow-_.mbient kit

RepLace

Check condition of relay on board

Replace if necessary

Properly tighten blower wheel to shaft

I_etermine cause and correst

Connectors should snap easily; do not force

Allow a few minute for motor 1o shut off

It measured voltage is more than 1/2, the

thermostat is incompatible with motor

If voltage is less than 1/2, the motor has failed

Verify proper drip loops in connector wires

Gently pull wires individually to be sure they are

crimped into the housing

Start-up checklist

(REMOVE AND STORE IN JOB FILE)

I. PRELIMINARY INFORMATION

Model No .............................................................................................................................................................

Serial No ..............................................................................................................................................................

Date .....................................................................................................................................................................

Technician ...........................................................................................................................................................

Job Location ...........................................................................................................................................................

II. PRE-START-UP

__ Verify that an packing materials have been removed from unit

-- Remove all shipping holddown bolts and brackets per installation instructions

-- Verify that condensate connection is installed per installation instructions

__ Check all electrical connections and terminals for tightness

-- Check that indoor (evaporator) air filter is clean and in place

-- Verify that unit installation is level

-- Check fan wheel propeller for location in housing and setscrew tightness

Ul, START-UP

Supply Voltage: L1-L2 -- L2-L3 -- L3-L1

Compressor Amps: L1 L2 L3

Indoor Fan Amps:

TEMPERATURE

Outdoor-Air Temperature: __ DB

Return-Air Temperature: -- DE} WR

Heat Pump Supply Air:

Electric Heater Supply Air:

PRESSURES

Refrigerant Suction psig

Refdgerant Discharge psig

-- Verify Refrigerant charge using charging tables

-- Verify that 3-phase scroll compressor is rotatingin correct direction

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

Book 1 4

Tab 6 8 PC 101 Printed in U.S.A. Catalog No. 50JS,JX-6Sl Pg 26 2-0_ Replaces: New

CARRIER Package Units(both Units Combined) Manual L0604564

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