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

3-Phase
Visit

Single-Packaged

50JS, 50JX
Heat Pumps

www.carrier.com

Installation, Start-Up,
and Service Instructions
NOTE: Read
installation.

the entire

instrdction

TABLE
SAFETY

RECEIVING

before

starting

the

OF CONTENTS

CONSIDERATIONS

INTRODUCTION

manual

.....................................................

..........................................................................

AND INSTALLATION

..........................................

Check Equipment ......................................................................
IDENTIFY
UNIT ................................................................
INSPECT

SIMPMENT

2
2

........................................................

Provide Unit Support ................................................................
ROOF CURB .......................................................................
SLAB MOUNT ...................................................................

2
2
2

GROUND MOUNT ............................................................
Provide Clearances ....................................................................

2
2

Rig and Place Unit ....................................................................
INSPECTION
......................................................................

2
2

INSTALLATION
................................................................
Select and Install Ductwork .....................................................

2
4

CONVERTING
DOWNFLOW

HORIZONTAL
(VERTICAL)

DISCHARGE
DISCHARGE

UNITS

UNITS ......... 5

Provide for Condensate Disposal .............................................
Install Electrical Connections ...................................................
HIGH-VOLTAGE
CONNECTIONS
................................
ROUTING
POWER LEADS INTO UNIT ......................
CONNECTING

GROUND

LEAD

TO GROUND

C99001

7
8

Fig. 1--Model 50JS/50JX

I0
10

LUG.10

ROUTING
CONTROL POWER WIRES (24-V) ............ 13
SPECIAL PROCEDURES
FOR 208-V OPERATION ...15
PRE-START-UP
START-UP

..........................................................................

...................................................................................

Check for Refrigerant Leaks ..................................................
Start-Up Adjustments ..............................................................
CHECKING
COOLING
AND HEATING
CONTROL OPERATION .................................................
CHECKING

AND

ADJUSTING

TROUBLESHOOTING
START-UP

REFRIGERANT

NOTE

18
19

MAINTENANCE
.........................................................................
Air Filter ..................................................................................

READ

THESE

INSTRUCTIONS

before installing this unit.
and Service Instructions are

SAFETY CONSIDERATIONS
Installation

20
21

hazardous due to system pressure and electrical components. Only
trained and qualified personnel should install, repair, or service
air-conditioning
equipment.

CONDENSATE
DRAIN PAN ...............................................
Outdoor fan .............................................................................

22
23

Electrical controls and wiring ................................................
Refrigerant circuit ...................................................................
Indoor airflow .........................................................................

23
24
25

Metering

device ......................................................................

line strainers ................................................................

and servicing

of air-conditioning

equipmem

can be

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,
attached to the unit, and other safety precautions

tags, and labels
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
Printed in U.S.A.

............................................................

Indoor blower and motor ........................................................
OUTDOOR
COIL, INDOOR COIL, AND

PC 101

TO INSTALLER

...............................................................

CAREFULLY
AND COMPLETELY
Also, make sure the Owner's Manual

CHARTS .................. 19
AIRFLOW
ADJUST-

..............................................................................

CHECKLIST

left with the unit after installation.

NO CHARGE ....................................................................
LOW CHARGE COOLING .............................................

Liquid

25
25
25
25

17
17

18
18

MENTS

Time-delay
relay .....................................................................
Loss of charge switch .............................................................
Check defrost thermostat ........................................................
Defrost Thermostat .................................................................

CHARGE ...........................................................................
REFRIGERANT
CHARGE ..............................................

TO USE COOLING CHARGING
INDOOR
AIRFLOW
AND

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

Catalog No. 50JS,JX-6SI

or designs without notice and without incurring obligations,
Pg 1

2-06

Replaces: New

IMPORTANT:
Improper installation, adjustment,
alteration, service, maintenance, or use can cause explosion, fire, electric shock, or

Curb

should

be level

to within

1/4 in. (See Fig.

6). This

necessary for unit drain to function properly. Refer to accessory
roof curb installation
instructions
for additional
information
a-s

service agency for information
or assistance. The qualified
installer or agency must use only factory-authorized
kits or
when modifying

of the unit to the roof curb is critical

and poor unit performance.

other occurrences, which could cause serious injury or death
or damage your property. Consult a qualified installer or

accessories

The gasketing

for a watertight seal. Install gaskeling material supplied with the
roof curb. Improperly applied gasketing also can result in air leaks

required.

this product.

SLAB MOUNT
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

Place the unit on a solid, level concrete
4 in. thick with 2 in. above

injury.

pad that is a minimum

grade (See Fig. 7). The slab should

Understand
the signal words -- DANGER, WARNING,
CAUTION, and NOTE. Danger identifies the most serious hazards,

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.

which will result in severe personal injury or death.
indicates a condition that could cause serious personal

GROUND

Warning
injury or

The unit may be installed

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
enhanced installation, reliability, or operation.

result

1. The power supply (volts, phase, and hertz) must correspond
that specified on unit rating plate.

2. The electrical
to handle

supply provided

load imposed

will

either on a slab or placed directly on the

ground if local codes permit. Place the unit
prepared with gravel for condensate discharge.

on level

The required minimum service clearances are shown in Figs. 2 and
3. Adequate ventilation
and ouUloor air must be provided. The

by die utility must be sufficient

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

by this unit.

or waste water codes and other applicable

and
and

under a partial overhang (such as a normal house overhang)
in. above the unit top. The maximum horizontal extension

local

partial overhang must not exceed 48 in. For extended
provide a minimum clearance of 48 in.
IMPORTANT:

Do not restrict

at either the outdoor-air
detrimental to compressor
severe

ground

Step 3---Provide Clearances

3. This installation must confurm with local building codes
with NEC (National Electrical Code). Refer to provincial
local plumbing
codes.

MOUNT

inJUry or death.

outdoor

inlet
life.

airflow.

die fan

is 36
of a

overhangs,

An air restriction
discharge

may

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

INTRODUCTION
The 50JS and 50JX heat pumps are fully self-contained
and
designed for outdoor installation (See Fig. 1). Standard units are

should be at least 4 in. above the highest expected water and runoff
levels. Do not use unit if it has been under water.

shipped in a horizontal-discharge
configuration
for installation on
a ground-level
slab, Units can be converted to downflow (vertical)

Step 4--Rig

discharge

configurations

for rooftop

applications.

Rigging and handling of this equipment
reasons due to the installation location
etc.)

RECEIVING AND INSTALLATION
Step 1--Check Equipment
IDENTIFY

identification
pers.
INSPECT

plate.

and serial number are stamped

Check

this information

against

on the unit
shipping

When

pa-

SHIPMENT

it examined

by transportation

working

with this equipment,

observe

support

precautions

staff

in the

literature, on tags, stickers, and labels attached to the equipment,
and any other safety precautions that might apply.
Follow
gloves.

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

can be hazardous for many
(roofs, elevated structures,

Only trained, qualified crane operators and ground
should handle and install this equipment.

UNIT

The unit model number

and Place Unit

inspectors

before

all applicable

safety

codes.

Wear safety shoes

and work

INSPECTION

removal.

Forward claim papers directly to transportation
company. Manufacturer is not responsible
for any damage incurred in transit.
Check all items against shipping list. Immediately
notify the

Prior to initial use, and at monthly

nearest Carder Air Conditioning
office if any item is missing. To
prevent loss or damage, leave all parts in original packages until
installation.

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.

Step 2--Provide

INSTALLATION

Unit Support

ROOF CURB
Install accessory

intervals,

all rigging brackets

and straps should be visually inspected for any damage,
of wear, structural deformation,
or cracks, particular

evidence
attention

1. Remove unit from shipping carton. Leave top shipping skid on
roof curb in accordance

with instructions

with curb (See Fig. 5). Install insulation, cant strips,
flashing. Ductwork must be attached to curb.

shipped

roofing,

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.

and

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355¸6 {14.00}
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FOP OF UNIT ...................................
DU¢1 S_O[ OF UNIT .............................
_ID[ OPPOSIT[ OUCTS............................
BOTTOll OF _iHI1 ...............................
ELECTRIC H_AT PANEL ..........................

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914.0
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BETWEEH UNITS, POI[R [#TRf SI{)[ .......................
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DIMENSIONS

DISTAHC[S:_F
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RIGHT SIDE VIEW

FRONT VIEW

C00137

UNIT

ELECTRICAL CHARACTERISTICS

50JS03O

208/230-3-60

UNIT WEIGHT
Ib

UNiT HEIGHT
IN. (MM)
"A"

287

130.2

39.02 (991.1)

CENTER OF GRAVITY
IN.(MM)
Y

50JS036

208/230-3-60,

460-3-60

291

132.0

37.02 (940.3)

19.5 (495.3)
19.5 (495.3)

208/230-3-60,

460-3-60

323

146.5

37.02 (940.3)

19.7 (500.4)

13.7 (348.0)
14.0 (355.6)

13,0(330.2)

50JS042
50JXO30

37.02 (940.3)
37.02 (940.3)

14.0 (355.6)

208/230-3-60,

145.2
148.8

19,7 (500.4)

50JX036

320
328

19.7 (500.4)

14.0 (355.6)

17.6 (447.0)
16.5 (419.1)

263/230-3-60
460-3-66

Fig. 2--50JS030-O42/50JX030-036
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
in the composite

a. Open lever of tension buckle

(ratchet

type).

c. Pull strapping

through

perimeter

buckle as shown in Fig. 8.

tension buckle

5. Tighten

the tension

buckle

until

it is taut. Lifting

brackets

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).

bottom

tension

Unit Dimensions

6. Attach field-supptied
clevis or hook of sufficient
hole in the tiffing bracket (See Fig. 8).

around

through

13.0 (330.2)

into the rigging holds

strapping

b. Feed strapping

15.0 (381 .o)

must be secure in the rigging holds.

pan.

4. Thread lifting bracket
unit as follows:

13,7 (348.0)

unit taut.

d. Snap lever down to lock strap in tension buckle. To release
strapping, squeeze safety latch, lift lever, and pull webbing
outward.

8. Position

lifting point directly

over the unit's

strength

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

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TOP OF UNIT ........................................
DUCT $1D[ OF UNIT ...................................
SIO_ OPPOSIIE DUCTS
.........................
80TIll
Or
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........................

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MILLIMETERS {IN]
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EVAP. COIL ACC[S$ SlOE ............................
POiE_ [NTEY SID[ .................................
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DISIANC[_IF

DIM[NSIONS

[41

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UNI[ I_ PLAC[O LESS fNkN 304 8 [12 00] FBO_ WALL
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i_--_
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LEFT SIDE
UNIT

"i"

.i'

•

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_ii_,

VIEW

[4 81]

,_ ...........

ELECTRICAL CHARACTERISTICS

FRONT VIEW

UNIT

WEIGHT

RIGHT SIDE VIEW

UNIT HEIGHT
IN. (MM)

5_S_8

208/230-3-60,

460-3-60

353

160.1

"A"

5_S_0

208/230-3-60,

460-3-60

418

189.6

5_X_2
5_X_8

208/230-3-60,

460-3-60

350

158.8

40.98

208/230-3-60,

468-3-60

315

170.1

40.98

5_X_0

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

428

194.1

42.98

38.96
38.98

Fig. 3---50JS048-060/50JX042-060
4

C00136

CEWrER OF GRAVITY
IN. (MM)
Y

(990.2)

19.9 (505.5)

15.7 (398.8)

17.0 (431.8)

(990.2)

19.9 (505,5)
19.9 (505.6)

15.7 (398.8)
15.7 (398.8)

17.0 (431.8)

(1040.9)
(1040.9)

19.9 (505.5)

15.7 (398.8)

16.6 (421.6)
18.0 (457.2)

(1091.7)

19.9 (505.5)

15.7 (398.6)

17.6 (447,0)

Unit Dimensions

G00071

CORNER WEIGHTS (SMALL CABINET)
Unit
30
36
O)
o
tt_
o

287

291

323

Corner Weight 1

Corner Weight 2

Corner Weight 3
Corner Weight 4

62
105

63
106

78
107

x
U3

13
0

Total Weight

CORNER WEIGHTS (SMALL CABINET)
Unit
30
36
320

328

Corner Weight 1
Corner Weight 2

63
74

64
76

---

Corner Weight 3

Corner Weight 4

127

130

Fig. 4_Corner

Select and size ductwork,

supply-air

X
o
o
"D
o

When designing

For vertical

and installing

ductwork,

consider

Corner Weight 2
Corner Weight 3

49
96

58
114

Corner Weight 4

132

156

Total Weight

350

375

428

Corner Weight 1

Corner Weight 2
Corner Weight 3

49
95

52
102

60
116

Corner Weight 4

131

140

160

unit to prevent

Use flexible
transmission

ensure weather tight
installed, use fireproof

and return air grilles

and return-air

418

IMPORTANT:

connectors
of vibration.

between

ductwork

Use suitable

and

gaskets

and airtight seal. When electric heat is
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

according to ASHRAE (American Society of Heating, Refrigeration, and Air Conditioning
Engineers) recommendations.
The unit has duct flanges on the supplythe side of the unit.

353

Weights (in Pounds)

and ventilating systems, NFPA
90B and/or local codes and

registers,

Total Weight
Corner Weight 1

CORNER WEIGHTS (LARGE CABINET)
Unit
42
48

Total Weight

non-residence
type air conditioning
90A or residence
type, NFPA
ordinances.

CORNER WEIGHTS (LARGE CABINET)
Unit
48
60

resistant duct connector (or sheet metal sleeve)
from electric heater element.

openings on

3. Size ductwork

die following:

for cooling

air quantity

must extend 24-in.

(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.

supply and return units, tools or parts could drop

4. Seal, insulate,

and weatherproof

all external

ductwork.

Seal,

into ductwork and cause serious injury or death. Install a 90
degree turn in the return ductwork between the unit and the

insulate and cover with a vapor barrier all ductwork passing
through conditioned spaces. Follow latest Sheet Metal and Air

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

Conditioning
Contractors National Association
(SMACNA)
and Air Conditioning
Contractors Association (ACCA) minimum installation
standards
for residential
hearing and air

space. Units with electric
supply duct.

conditioning

heaters

require

90 degree

elbow in

5. Secure all ducts to building structure. Flash, weatherproof,
and
vibration-isolate
duct openings in wall or roof according to

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
change

abrupt duct size increases
and reductions.
in duct size adversely affects air performance.

systems.

good construction

Abrupt

practices.

VACunit

ou .a.
Rashing field

•
Wood nailer*

I_:11 _¢ Insulation
(field
field supplied --

-Duct work

Cant strip
field supplied

field supplied

Roof Curb for Small Cabinet

Roof

Note A:When unit mounting screw is used
retainer bracket
must also be used.

Curb for

Large Cabinet

Note A:When unit mounting screw is used
retainer bracket must also be used.

SUpp opening
IBx_

\/
/\

\
R/A

Insulated
deck pan

S/A

_-Gasket

around
duct

Gasket around
outer edge _

Long

Returnopemng
(exc)

C00076

UNIT SIZE
50JS030-042
50JS048-060

50JX030-036
50JX042-060

ODS CATALOG NUMBER

IN.(MM)

IN. (MM)

CPRFCURBO06AO0

6 (203)

11(279)

151/2 (419)

28-3/4

IN. (MM)

CPRFCURBOO7AO0

14 (356)

11(279)

161/2 (419)

28-3/4

CPRFCURB008AO0

8 (203)

16 3/16 (411)

17 3/8 (441)

40-1/4

(730)
(730)
(1022)

CPRFCURB069A00
14 (356)
16 3/16 (411)
17 3/8 (441)
40-1/4 (1022)
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 1 Ib density.
8. Dimensions are in inches.
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
6

MAXIMUM

ALLOWABLE

DIFFERENCE(in.)
B

A-B
1/4

A-c
1'4

C99065

Fig. 6--Unit Leveling Tolerances

COND. COrL

EVAR COIL

C99096

Fig. 7--Slab Mounting Detail
CONVERTING
DOWNFLOW

HORIZONTAL
(VERTICAL)

DISCHARGE

UNITS

The units dispose of condensate through a 3/4 in. NPT female
fitting that exits on the compressor
end of the unit. Condensate

UNITS

water can be drained directly onto the roof in rooftop installations
(where permitted) or onto a gravel apron in ground level installa-

M_
Before

performing

service

system,

turn off main power

maintenance

operations

to unit and install lockout

Turn off accessory heater power switch if applicable.
trical shock could cause serious injury or death.
1. Open all electrical disconnects
starting any service work.

and install lockout

2. Remove side duct covers to access bottom
knock outs.
NOTE: These panels
electrical knockout.

are held in place

return

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

and supply

If the installation
requires draining
from the unit, install a field-supplied

4. Ensure the side duct covers
horizontal
air openings.

to block

Avoid

abrupt duct size increases

in duct size adversely

Step 6--Provide

affects

for Condensate

and reductions.

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

in the

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 a slope of at least 1 in. every l0 ft. of horizontal run.

off the
Abrupt

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

Disposal
methods

trap is available

to an

air performance.

NOTE: Ensure that condensate-water
disposal
with local codes, restrictions, and practices.

the condensate water away
2-in. trap at the condensate

connection to ensure proper drainage. Condensate

the panels

change

the trap is at lea_st 1 in. lower than the drain-pan condensate
connection to prevent the pan from overflowing.
Prime the trap

tag before

3. U_ a ,screwdriver and hammer to remove
bottom of the composite unit base.

NOTE:

tag.
Elec-

with tabs similar

are in place

tions. Install a field-supplied
condensate trap at end of condensate
connection to ensure proper drainage. Make sure that the outlet of

comply

of the cooling season

start-up.

Table 1--Physical
50JS03O

UNIT SIZE

Data

50JS036

50JS042

50JS048

5OJS060

NOMINAL CAPACITY (ton)

2-1/2

3-1/2

OPERATING WEIGHT (lb.)
COMPRESSOR QUANTITY
TYPE

287

291

323

353

418

RECIPROCATING

COMPRESSOR

SCROLL

REFRIGERANT
REFRIGERANT

COMPRESSOR

R-22

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)

AccuRater_
5.6

7.6

8.0

7,85

9.3

0.068

0.078

0.088

0.093

0.046 (2)

0.052 (2)

1...17
12.0

2,,.17
10.3

2.,.17
10.3

2...17
11.6

2400
22

2800
22

3300
22

1/8 (825)

1/4 (1100)

2400
22
1/8 (825)

1/4 (1100)

3-.15
3.7

3...15
3.7

4...15
3.7

3...18
4.7

4,..15
4.7

1000
10X10

1200
11X10

1250
11X10

1600
11XI0

2000
11X10

1/4 (1075)

1/2 (1075)

3/4 (1075)

1 (1100)

20X20X1

20X24X1

24X30X1

0.042

RETURN-AIR FILTERS (in.)
throwaway

(2)

Table

2--Physical

0.057

(2)

24X30X1

0.061 (2)

24X30X1

Data

UNIT SIZE

50JX030
2-1/2

50JX036
3

50JX042
3-1/2

50JX048

NOMINAL CAPACITY (ton)

50JX060
5

OPERATING WEIGHT (lb.)
COMPRESSOR QUANTITY
TYPE

32O

328

350

375

428

1
SCROLL COMPRESSOR

REFRIGERANT
REFRIGERANT

R-22
AccuRater_

METERING DEVICE

Refrigerant (R-22) Quantity (lb.)

6.4

7.0

10.8

ORIFICE ID (in.)
ORIFICE OD (in.)
OUTDOOR COIL
Rows... Fins/in.
Face Area (sq, ft,)
OUTDOOR FAN
Nominal Airflow (CFM)
Diameter
Motor HP (RPM)

0.073

0.076

0.080

10.1
0.088

0.093

0.043 (2)

0.040 (2)

0.052 (2)

01057 (2)

0.063 (2)

2...17
10.3

2...17
13.7

2..,17
15.7

2350
22

2800
22
114 (1100)

2800
22
1/8 (825)

3300
22
1_ (1100)

3300
22
1/4 (1100)

1/8(825)

12.3

INDOOR COIL
Rows... Fins/in.
Face Area (sq. ft.)
INDOOR BLOWER
Nominal Airflow (CFM)
Size (in.)
Motor HP (RPM)

3...15
3.7

4...15
3.7

4...15
4.7

4._15
4.7

4...15
5.7

1000
10X10
1/4 (1075)

1200
10X10
1/2 (1075)

1400
11X10
1/2 (1075)

1450
11X10
1/2 (1075)

1750
11X10
1 (1040)

RETURN-AIR FILTERS (in.)
throwaway

20X20X1

20X24X1

24X30X1

24X30Xl

24X30X1

NOTE;Air filter pressure dropfor non-standardfiriers mustnotexceed 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 run on mediumor highspeedwhen usedin coniunction
with 15 kwelectric heataccessory

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

50JX03O

50JX036

50JX042

50JX048

50JX060

AIR FLOW (C FM)

13O0"

1200

1400

1600

2000

• The 030 size models mustbe runon mediumor highspeedwhen usedin conjunction
with 15 kwelectricheataccessory

DETAIL A

(
SEEDETAILA_'

A05179

UNIT
Size

MAXIMUM WEIGHT
(INCLUDES SHIPPING SKID)
Lb
Kg

In.

Mm.

In.

in3.

50JS030
50JS036

3O9
313

140.2

19.5

495.3

17,50

444.5

142,0

19.5

50JS042

345

19.5

495.3
495.3

17.75
17.75

450.9
450.9

50JS048
50JS060

375

156.4
170.1

20.5

520.7

20.62

523.8

440

199.6

495.3

19.75

501.7

50JXO30
50JX036

342

155.2

19.5
20.0

508

19,25

489

350

159.8

20.0

372
377
45O

168.8
171.0

21.O
20.0

19.0
20.5

482.6

50JX042
50JX048

508
533.4

204.2

21.0

508
533.4

21.25
20.0

50JX060

Fig. &--Suggested

520.7
539.8
508,0

Rigging

C00139

Fig. 9_Typical

Installation

Failure to follow these precautions
the unit being installed:
1. Make all electrical connections
ANSI/NFPA

(latest

could result in damage
in accordance

edition)

and

local

with NEC

electrical

codes

governing
such wiring. In Canada, all electrical connections must be in accordance
with CSA standard C22.1
Canadian
Electrical
Code Part I and applicable
codes. Refer to unit wiring diagram.
2. Use only copper conductor
for
field-supplied
electrical disconnect
NOT USE ALUMINUM
WIRE.

local

connections
between
switch mad unit. DO

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

Horizontal Duct Covers
c99030

Fig. 10--50JX with Duct Covers On
(Unit Shown with Optional Louvered Grille)

HIGH-VOLTAGE

+
+

TRAP
OUTLET
_

F'_

--""""7

The unit

Trap

have

a separate

electrical

service

with

a field-

If the unit has an electric heater, a second disconnect
required. Consult the Installation,
Start-Up, and Service

may be
Instruc-

tions provided
tions.

connec-

Operation

with the accessory

of unit on improper

may cause unit damage

an uninterrupted,
unbroken
the possibility
of personal

ROUTING

POWER

for electrical

line voltage

service

constitutes

abuse and

that could affect warranty.

LEADS

INTO

UNIT

Use only copper wire between disconnect and unit. The highvoltage leads should be in a conduit until they enter the duct panel;

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

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

ground when installed in accordance with NEC, ANSI/NFPA=
American National Standards Institute/National
Fire Protec-

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

tion Association
(latest edition) (in Canada, Canadian Electrical Code CSA C22.l) and local electrical codes. Failure to
adhere to this warning

must

(ampacity) for wire sizing (See Tables 5 and 6 for electrical data).
The field-supplied
disconnect may be mounted on the unit over the
high-voltage
inlet hole (See Fig. 2 and 3).

¥!_ |','l:%q_,1I_
must have
to minimize

CONNECTIONS

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

Electrical Connections

The unit cabinet
electrical ground

contained

control wires are in same

j_
C99013

Fig. 11--Condensate

wires for lfighest voltage

5. Do not damage internal components when drilling through
any panel to mount electrical hardware, conduit, etc.

1" (25ram) MIN.

Step 7--Install

low-voltage

within conduit when low-voltage
conduit as high-voltage
wires.

raceway

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).

could result in serious injury or death.

CONNECTING
Connect

GROUND

the ground

LEAD

TO GROUND

lead to the chassis

LUG

using the ground

lug in the

wiring splice box (See Fig. 16).
ROUTING

CONTROL

Form a drip-hiop

POWER

WIRES

with the thermostat

(24-V)

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
section.

as described

in Special

Procedures

for 208-v

Operation

Table 5_Electrical
UNIT 50JS
SIZE

O3O

_PH-HZ

208/230-340

208/230-3-80

VOLTAGE
RANGE

COMPRESSOR

MIN

MAX

RLA

LRA

187

253

9.9

187

253

OFM
FLA

0.9

IFM
FLA

208/230-3-60

414

187

506

253

5.5

12.4

20/20
30/35
45/50
60/-

-/70

18.0/18.0
31.0/33.0
44.0/48.0
57.1/63.1

25/25
35/35
45/50
60/-

-/70

./.
6
10
15
./.
3.8/5,0
7.5/10.0
11.3/15.0
15.0/19.9

-/6.0
12.0
16.0
-/10.4/12.0
20.8/24.1
31.3/36.1
41.6/48.0

9.6
17.1
24.6
32.1

15
20
25
35

20.2/20.2
33.2/35.2
46.3/50.3
59.5/65.3
72.2/80.2

25/25
40/40
50/60
60/-

1.8

-/5
10
15
20.0

./o
6.0
12.0
18.0
24.1

11.0
18.5
26.0
33.5
41.0

15
20
30
35
45

3,5

./.
3.8/5.0
7.5/10.0
11.3/15.0
15.0/20.0

./.
10.4/12.0
20.8/24.1
31.3/36.1
41.6/48.0

22.6/22.6
35.7/37.7
48.7/52.7
61,7/67.7
74.6/82,6

30/30
40/40
50/60

-/-

5
10
15
26
-/3.3/5.0
7,5/10.0
11,3/15,0
15.0/19.9

6,0
12.0
18.0
24.1
-/10.4/12.0
20.8/24.1
31,3/36.1
41.6/48.0

11.5
19,0
26.5
34.0
41.5

15
20
30
35
45

32.0/32.0
45.0/47.0
58.0/62.1
71.1/77.1
83.9/91.9

40/40
50/50

14.0
21.5
29.0
36.6
44.1

20
25
30
40
45

3.8

O42
460-3_60

208/230_3_0

414

187

506

253

6.7

14,1

105

0.8

1.5

048
460-3-50

208/230-,3-60

414

187

506

253

7.1

19.4

125

0.8

1.8

1.5

-/3.8/5.0
7.5/10,0
11,3/15.0
./.
3.8/5.0
7.5/10.0
11,3/15.0

15.3/15.3
28.3/30.3
41.3/45.3
54.4/60.4

1.9

0.9

FLA
-/10.4/12 .0
20.8/24,1
31.3/36.1
-/10,4/12,0
31.3/36.1
36.1/41.7

4.1

0,8

Nominal
kW*

5,2

O60

-/-

460_._-80

414

506

8.0

0.8

3.2

SINGLE POINT POWER SUPPLY
FUSE OR
CKT BKR

036
460-3-60

ELECTRIC HEAT

MCA

2.0

1.5

9.9

Data--50JS

5
10
15
20

6.0
12.0
18.0
24,1

MOCP

-/70
80/90

7o o
80/90

60/70
80/80
90/100

Table 6--Electrical
UNIT 5OJX
SIZE

O30

V-PH-HZ

VOLTAGE
RANGE
MIN

208/230-3--60

208/230_60

187

187'

MAX

253

COMPRESSOR
RLA

10.4

11.2

LRA

OFM

IFM

FLA

0.9

1.6

208/230-3_0

414

187

506

253

5.4

12.4

37.5

0.9

208/230-3-60

414

187

506

253

5.8

13.0

0.9

1.6

460_3_0

208/230_3_30

414

187

506

253

6.4

17.3

46.5

123

0.9

2,1

-/10.4/12.0
20.8/24.1
31.3/36.1

16.0/16.0
29.0/31.0
42.1/46.1
55.1/61,1

20/20
35/35
45/50

3.6

-/3.8/5.0
7.5/10.0
11.3/15.0

-/10.4/12.0
36.1/41.7
31.3/36.1

19.2119.2
32.0/34.2
45.2/49.3
58.3/64.3

25/25
35/35
50/50

1.9

-/5
10
15

46
12
18

9.6
17.1
24.6
32.1

15
20
25
35

4.1

-/3.8/5.0
7.5/10,9
11.0/15.0
15.0/20.0

-/10.4/12.0
29.8/24.1
31.0/36.1
41.6/48.0

20.5/20.5
33,5/35.5
46.6/50.6
59.6/65.6
72,5/80.5

25/25
40/40
59/60

2.9

-/5
10
15
20

-/6
12
18
24.1

10.2
17.7
25.2
32.7
40.2

15
20
30
35
46

4.1

-/3.6/5.0
7.5/10,0
11.3/15,0
15.0/20.0

410.4/12.0
20.8/24.1
31.3/36.1
41.5/48.0

21.9/21.9
34.9/36.9
47.9/51.9
60.9/67.0
73.8/81.8

30/30
40/40
50/60

45
10
15
20

-/6
12
18
24.1

10.8
18.3
25.8
33.3
40.8

-/3.8/5.9
7.5/10.0
11.3/15.0
15.9/19.9
-/5
10
15
20

-/10.4/12,0
20.6/24.1
31.3/36.1
41.6/48.0
-/6
12
18
24.1

29.2/29.2
42.3/44.3
55,2/59.4
68.3/74.3
81.2/89.2
15.4
22.9
30.4
37.9
45.4

1.4

2.0

6.2

O60
460-3_0

414

506

9.0

0.9

3.2

kW*

FUSE OR
CKT BKR

-/3.8/5.0
7.5/10.0
11.3/15.0

048

Nominal

SINGLE POINT POWER SUPPLY
MCA

042
460-3_0

ELECTRIC HEAT
FLA

036
460-:_60

Data--50JX

MOCP

60/70

60/70
80/90

70/70
80/90

15
20
30
35
45
35/35
50/50
60/60
70i80
90/90
20
25
35
40
50

fII_L_IELO

_1 _L E-

-- ,,EL
i

SUPPLY
--WI2I

I-

8LU

EOUIP.GNO

ACCCSSORV
USED WITH
OPTION ONLY
ELECT.EkI
US£1) WITH
N[AT[R

_I_--

- _"
BL

--I__

Pmm_H'
_

[024
(042

060)

0601

kWP S B

lO HIR

MAXWIldE2
Ai(G
i
'___=
_
(50 Ak(P FOE 15 KI_ )
IFUI 3 /_ 5)
TO
US 0 IVT
I
_HI_
ACCESSORY
_
Iuz
MI i_
LCI
Hkl
I
30,kMPSB
_
OPTION
ON Y
_
TO
USED WIIH
_
GO AMP S 8
HTR
HEATER OPTIONS
_YEL--

19 9 KW

BLU RED

SPED

I •

15 K W

[CONNECT

-RED

OPTIONSN

060)

FOR

50JX030

ONLY)

VEL

W128

BLK--

GRN-YEL_26
GEN-YEL

i _euect
(20

GRN

YEL_
GRN-y[[

BLU-TRANI

K W

SHOV_,_}

MA,UAL

3 2 AMP
RESEl_

C_,.,-_

WIT BR_

_)6 GRN

q
SEE NOTE 15_
ON
NIT

RED

C)ll

AUTO S
_19

ORN

_W
_20
-------_18

WHT
YE_

_;.PPLT._
uPL.E_t

_131

pN_

W2-_y2

rlEL_
SEE

i_ _

THERMO_IAT
NOTE#2

WHI

_'130

VIO

_133

I--

GRA_

_21BRN---

HRI

_12o
2(V SPLICE

UNIT

COWPONENI

_70
RN

[20

BRN

5RN--

KWI_

BOX

ARRANGEWENT

iouI_
F_N
_SECIIOU

rl{Lo S_LIC(

_H_

_BJUST_BL(
W_*_ _NT_I_I_

fUS{

O_W

OUt_

IDN (L)k

r_I _EOUEN¢[

CLOSES
T_T

OENS

r_ _tO_

,_r_ost
/
FOI IIII_
II iZ _

SOJS04_I
SDa%04_'O_O
0_I

!50JS5OOOOG(? 0
GO( 134

Fig. 12--Wiring Schematics (208/230-3-60)
13

c
_AXIMU_

SIZE

WIR[

2 AWG

FIEL_

50-1BVIATIC

BLK

YEL--_ /

- _,.

TEL--

CApZ

YEL

OFM

_o_

[OUIP _ND

ACCESSORY
ELECT HEAT
OPTION ONLY
HEATER
5,10,15

AWG[

WAXWIR

OPTIDNS
_ _0 KW

Y[L

g_
L-L_--BE

_25

GRN

YEL_?6
GRN Y[L

GRN-YEL_
GRN

--W16

YEL

GRN
SEE NOTE

PLI-I

UNIT

COMPONENT

ARRANGEMENT
Te_ (I _

[WEmOIZED

_ILI_

DE-ENEe_Ep

COWpRES_ORDELay

F:_

_F_OS _

_W_
[ou_e

O_W_

_ffs_I iF_

llW[ D[L_ ffL*_

m IM{OlI_,_L II_[_F_m=Is.[_
_( e[eL_:E_

150JS50000717
0
C00135

Fig. 13--Wiring Schematics (460-3-60)
14

EXAMPLE: Supply voltage is 460-3-60.

FLA

Full Load Amps

LEGEND

LRA
-- Locked Rotor Amps
MCA
-- Minimum Circuit Amps
MOCP -- Maximum Overcurrent Protection
RLA
-- Rated Load Amps
CKT BKR -- Circuit Breaker

AB
=452v
Average
Voltage =

BC = 464 v

452 + 464 + 455
3

= 1371
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 voltage is greater than 2%, Use the following formula to determine
the percentage of voltage imbalance.

Determine
maximum
deviation
(AB) 457
452=5v
(BC) 464
457=7v
(AC) 457
455=2v
Maximum
deviation is 7 v.

from

average

voltage.

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%.

% Voltage imbalance
= 100 x

AC = 455 v

,, o o

max voltage deviation from average voltage
average voltage

IMPORTAN]_ If the supply voltage phase imbalance is]
more than 2%, contact your local electric utility company/
immediately.

Fig. 1€--Electrical

L.--

_.__

/
C99024

Data Legend

BRN_-

----L----

o.N_

RED --

GRN
--

THERMOSTAT

UNIT CONTROL POWER
SPLICE BOX

AND SUBBASE

C99056

Fig. 15---Control Connections

24 V Circuit Breaker

GROUND LUG
IN SLPICEBOX)
C99070

GROUND

"L_AS- _
Fig. 17--Control

SINGLE-PHASE
CONNECTIONS
TO DISCONNECT
PER NEC

Wiring Plate

_BLK--

........

_YEL--

TRANSFORMER CONTAINS A MANUAL
RESET OVERCURRENT PROTECTOR

L3 ........
_C_-"-BLU -3-PHASE
CONNECTIONS
NOTE: Use copper wire only.
LEGEND
NEC - National Ele_rical Code
- - Field Wiring
_
Splice Conne_ions

IT WILL NOT AUTOMATICALLY RESET
DISCONNECT POWER AND INSTALL
LOCKOUT TAG PRIOR TO SERVICING
THIS COMPARTMENT MUST BE CLOSED
EXCEPT WHEN SERVICING

C99057

Fig. 16---Line Power Connections

C99058

Fig. 18_Transformer
15

Label

SPECIAL

PROCEDURES

1. Disconnect

FOR 208-V

the yellow primary

unit wiring

blower-motor

operation.

b. Make

speeds

lead to the transformer

sure that condensate

5. Compressors
remove

for 208-v

Refer to indoor airflow and airflow adjustments

pan and trap are filled

c. Make sure that all tools and miscellaneous
been removed.

terminal

may need to be changed

drain

with water to ensure proper drainage.

See

label (See Fig. 12).

2. Connect the yellow primary
labeled 200-v.
Indoor

OPERATION

lead from the transformer.

section.

6. Each

unit

Schrader
Schrader

PRE-START-UP

are internally

compressor
system

loose parts have

spring mounted.

holddown

Do not loosen or

bolts.

has 2 Schrader-type

port.s, one low-side

fitting located on the suction line, and one high-side
fitting located on the compressor discharge line. Be

sure that caps on the ports are tight.

Failure
serious

to observe the following
personal injury or death:

1. Follow
goggles

warnings

recognized
safety practices
when checking or servicing

2. Do not operate compressor
unit unless
secured.

result

and wear
refrigerant

the field. Ensure
possibility

protective
system.

the plastic caps axe in place and tight or the

or refrigerant

leakage

could occur.

or provide any electric power to

compressor

3. Do not remove

could

7. High flow valves are located on the compressor hot gas and
suction tubes. These valves can not be accessed for service in

terminal

compressor

cover

is in place

and

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

5. Never attempt to repair soldered
erant system is under pressure.

connection

C99009

Fig. 19_Fan Blade Clearance

wear

protective

System

goggles

START-UP
Using the Start-Up
proceed as follows:

and

Step 1--Check

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
remove component from unit.
d. Carehiliy

unsweat

remaining

MOTORSHAFT

while refrig-

6. Do not use torch to remove any component.
contains oil and refrigerant under pressure.
To remove a component,
proceed as follows:

MOTORAND FANHUB

terminals.

tubing

sary. Oil can ignite when exposed

Checklist

supplied

for Refrigerant

Locate and repair refrigerant

at the end of this book,

Leaks

leaks and charge the unit as follows:

I. Use both high- and low-pressure
ports to relieve
pressure and reclaim remaining refrigerant.

cutter and

2. Repair

stubs when neces-

NOTE:

to torch flame.

leak following

Instal] a bi-fhiw

accepted

system

practices.

filter drier whenever

the system has been

opened for repair.
Use the Start-Up Checklist supplied at the end of this book and
proceed as follows to inspect and prepare the unit for initial

3. Check system

start-up:

4. Reclaim refrigerant and evacuate refrigerant
microns if no additional leaks are found.

system

5. Charge

a volumetric-

1. Remove

access panel.

2. Read and follow instructions
CAUTION,
shipped

and

on all DANGER,

INFORMATION

labels

WARNING,

attached

to,

a. Inspect

inspections:

for shipping

lines, loose

Step 2---Start-Up

and handling

parts, disconnected

damages

Complete

tubing connections

erant leak is detected,
Leaks section.

or liquid-soap
see following

refrigerant,

solution.

and on

low-ambient

If a refrig-

the

Adjustments

required

procedures

kit is installed).

Allow 5 minute
damage.

Check for Refrigerant

c. Inspect all field and factory-wiring
connections.
that connections
are completed and tight.

given

between

touch

e. Inspect coil fins. If damaged
carefully

straighten

4. Verify the following

refrigerant

tubing

during shipping

cycles

the compressor.

to prevent

compressor

operation as follows:

or sharp
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

and handling,

switch is placed

conditions:
blade is correctly

the Pre-Start-Up

CHECKING
COOLING AND HEATING
CONTROL
OPERATION

Be sure

Pms with a fin comb.

a. Make sure that outdoor-fan
fan orifice (See Fig. 19).

Do not rapid-cycle
"on"

Start and check the unit for proper control
d. Ensure wires do not
sbeetmetal edges.

using

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

unit base. Detecting
oil generally indicates a refrigerant
leak. Leak-test
all refrigerant
tubing connections
using
leak detector,

R-22

to 500

such as broken

wires, etc.

b. Inspect for oil at all refrigerant

electronic

with

method.

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.

with, unit.

3. Make the following

unit

for leaks using an approved

positioned

2. Place SYSTEM
AUTO position.

in AUTO

position.

switch in COOL position and FAN switch in
Set control below room temperature. Observe

that cooling cycle shuts down when control setting is satisfied.

_rF
OUTDOOR COIL

INDOOR COIL
Bypass
Position

LCS

Metering
Position

LEGEND
HPS - High Pressure Switch
LCS - Loss of Charge Switch
_j_
]

Accurater e Metering Device
Arrow indicates direction of flow
C00095

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

INDOOR COIL
Metering
Position

LCS
OUTDOOR

Bypa_
Pos_ion

LEGEND
HPS - High Pressure Switch
LCS - Loss of Charge Switch
"_
Accurate# Metering Device
]

Arrow indicates direction of flow

C00096

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

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
down when control setting is satisfied.

REFRIGERANT

of 15 minutes

4. When using an automatic changeover room thermostat, place
both SYSTEM and FAN switches in AUTO positions. Ob-

NOTE:

before checking

Adjustment

or adjusting

of the refrigerant

control

physical

internal protector

IMPORTANT:
When evaluating
cated adjustment to the specified

power

leads to the unit must be reversed to correct rotation. When turning
backwards, scroll compressors emit elevated noise levels, and the
difference
between
may be dramatically

compressor
suction
lower than normal.

and discharge

is not required

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

IMPORTANT: Three-phase,
scroll compressors
are direction oriented. Unit must be checked to ensure proper compressor 3-phase
power lead orientation.
If not corrected
within 5 minute, the
The 3-phase

charge.
charge

unless the unit is suspected of not having the proper R-22 charge.
The charging label and the tables shown refer to system temperatures and pressures in cooling mode only. A refrigerant charging

serve that unit operates in Cooling mode when temperature
control is set to "call for Cooling" (below room temperature),

will shut off the compressor.

CHARGE

The refrigerant system is fully charged with R-22 refrigerant and
is tested and factory sealed. Allow system to operate a minimum

cycle shuts

and unit operates in Heating mode when temperature
is set to "call for Heating" (above room temperature).

AND ADJUSTING

data table also.)
the refrigerant charge, an indifactory charge must always be

very minimal. If a substantial adjustment is indicated, an abnormal
condition exists somewhere in the cooling system, such as insufficient airflow across either coil or both coils.

pressures

Balance Point Worksheet
7O

so
mg
_o
m_

,0
m_

80
:z:o_ 30

_._ 20

-10

OutdoorAir Temp (Deg F)
C00093 Rev 2

Fig. 22--50JX Balance Point Worksheet
REFRIGERANT

CHARGE

INDOOR

AIRFLOW

AND AIRFLOW

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

¥_ [__.'luhnl[.]H

Section.

For heating and cooling operation, the recommended
is 350 to 450 cfm for each 12,000 Btuh of rated

NO CHARGE

CHARGE

4. Failure
the unit.
Tables

COOLING

external

to maintain these airflows

7 and 8 shows both heating
static

pressures.

Use Cooling Charging Charts (Fig. 24-33). Vary refrigerant until
the conditions of the chart are met. Note that charging charts are

airflow for the system

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

from obstructions,

NOTE:

Indoor

air CFM

must be within

the normal

CHARGING

operating

should

at various

Refer to these tables to determine

Be sure that all supply-and

For 2081230-v
follows:
3-SPEED

CHARTS

Black

Take the outdoor ambient temperature
and read the suction
pressure gauge. Refer to the chart to determine what the suction
temperature

and cooling airflows

the

and adjusted

return-air

grilles are open, free

properly.

by changing

the lead connection

of the

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.

range of the unit.
TO USE COOLING

could result in damage

being installed.

Airflow can be changed
blower motor.

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.

airflow
cooling

capacity. For units with optional electric heat, the airflow
must not be reduced below the levels stated in Tables 3 and

Check for leak. Use standard evacuating techniques. ARer evacuating system to 500 microns, weigh in the specified amount of
refrigerant (refer to system data plate).
LOW

ADJUSTMENTS

Motors:--

The

motor

leads

are color-coded

= high speed

Blue = medium speed
Red = low speed

be.

To change the speed of the indoor fan motor (IFM), remove
NOTE: If the problem
causing
the inaccurate
readings is a
refrigerant leak, refer to Check for Refrigerant Leaks section.

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
70
Based on Indoor Entering

Air of 70 F and Rated CFM

ca 50
_o

o_
go

...__ 40

Im
_q:3

ca_
_E 2o

-10

20
Outdoor

Air Temp (Deg F)
C00094rev2

For 460-v
follows:

GE Motors_The

motor

leads

Fig. 23_50JS

Balance Point Worksheet

are color

coded

3-SPEED

The ability to properly perform
ment requires certain expertise,

Black = high
Violet = jumper

equipment.
If you do not possess these, do not
perform any maintenance
on this equipment, other
procedures recommended
in the User's Manual.
TO HEED THIS WARNING
COULD RESULT

Orange = medium
Red = low
To change

die speed

of the indoor fan motor

motor speed lead from the Time

(IFM),

remove

fan

OUS INJURY OR DEATH
THIS EQUIPMENT.

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

black lead to the BR. Insulate the jumper
chassis parts.

(QC) and connect

maintenance
on this equipmechanical skills, tools and

AND POSSIBLE

Failure to follow these warnings
or death:

the

attempt to
than those
FAILURE
IN SERI-

DAMAGE

could result in serious injury

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

to avoid contact with any

with any mechanical equipment, personal injury can result
from sharp edges.
3. Never place anything combustible either on, or in contact
with, the unit.

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:
about the availability of a maintenance

Consult your local dealer
contract.
ing when servicing.
The minimum
follows:

maintenance

requirements

for this equipment

are _.s

Table 7--Wet Coil Air Delivery
Unit 50JS 030-060 (Deduct 10 percent for 208-V)*
MOTOR
SPEED

UNIT

Low
3O

Med

High
Low
36

Med

High

Med

High
Low
48

Med

High
Low
6O

0.1

0.2

Watts

295

292

289
802

Med

0.8

0.9

1.0

I
I

Cfm

928

882

388

383

377

372

366

361

Cfm
W_ts
Cfm

1203

1120

1062

1004

930
469
1141

838
458
1027

449
924

442
828

W_ts
Cfm

592
1499

552
1281

538
1207

525
1125

512
1034

499
936

Watts

660

636

617

603

592

581

Cfm
WaRs
Cfm

1475

1371

1274
776
1452

1186
761
1356

1105
744
1254

1024
725

i
]

928
706

1145

]

1030

550
1146

537
1066

581
1421

606
1464

567
1351

596
1399

586
1341

575
1282

563
1218

WaRs

680

665

649

635

622

611

600

590

Cfm

1608

1535

1461

1387

1316

1247

1180

1111

Watts
Cfm

768
1656

755
1576

742
1508

730
1447

718
1396

797
1331

596
1268

684
1198

671
1119
552
1384

WaRs

741

724

709

690

664

631

594

562

Cfm

1994

1937

1869

1797

1722

1645

1566

1480

566

1
1
I
543
1269

773

744

715

667

662

640

625

Cfm
WaRs
Cfm

1957

1867

1787
799
1914

1719
782
1842

1653
773
1774

1575

1463

756
1686

704
1538

WaRs

742

723

698

666

629

591

559

540

Cfm
W_ts

2197
838

2141
822

2103
803

2057
760

1988
752

1894
721

1783
689

1674
661

Cfm

2485

2406

2269

2127

2012

1937

1894

1855

934
2483

913
2391

691
2283

666
2170

837
2061

806
1960

776
1868

689
910

WaRs

WaRs
Cfm

High

EXTERNAL STATIC PRESSURE (IN. WG)
0.3
0.4
0.5
0.6
0.7

WaRs

WaRs
Cfm

Low
42

0.0

[
I
639

632

1770
750

]
[

1571
735

1780

1687

* Air delivery values are based on operating voltage of 230_v or 460-v, wet coil, without filter 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 coil frosting 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

replace

Step 2--Indoor

when

necessary.
2. Inspect

indoor

coil, drain

pan,

cooling

season

for cleanliness.

and condensate

electrical

connections

proper
sary.

operation

each cooling

season.

and controls

Service

refrigerant

for

or sha_

the unit without
Always replace

Inspect

month

at least

once

each

Inspect

(See Tables

and

tag

electrical

power

Step 3--OUTDOOR
COIL, INDOOR
CONDENSATE
DRAIN PAN

a suitable air filter
the fiker with the

installed

and

the unit

before

cleaning and lubricating the blower motor and wheel. Failure
to adhere to this warning could cause serious injury or death.

Filter

filter(s)

efficiency,
wheel and

when neces-

tubing

same dimensional size and type a_soriginally
I and 2 for recommended
fdter sizes.)
air

to lubricate

For longer life, operating economy,
and continuing
clean accumulated
dirt and grease from the blower

each cooling

Disconnect

IMPORTANT:
Never operate
in the return-air duct system.

Do not attempt

motor annually.

for tightness

5. Ensure wires are not contacting
sheet metal edges.
Step 1--Air

for cleanliness

and motor

NOTE: All motors are prelubricated.
these motors.

each

Clean when necessary.

3. Inspect blower motor and wheel
season. Clean when necessary.
4. Check

drain

blower

the condenser

coil, evaporator

pan at least once each heating
conditions require.

replace

COIL, AND

coil, and condensate

and cooling

season

drain

or sooner

The coils are easily cleaned when dry; therefore, inspect and dean
the coils either before or after each cooling season. Remove all

(throwaway-type)
or clean (cleanable-type)
at lea.st twice during
each cooling season or whenever the f-alterbecomes clogged with
dust and tint.

obstructions,
including weeds and shrubs,
airflow through the condenser coil.

that interfere

with the

Table 8_Wet Coil Air Delivery
Unit 50JX 030-060 (Deduct 10 percent for 208-V)*
MOTOR
SPEED

UNIT

Low
3O

Med

High
Low
36

Med

High
Low
42

Med

High
Low
48

Med

High
Low
Med

High

Watts
Cfm

0.O

0.1

0.2

276
963

276
929

272
781

EXTERNAL STATIC PRESSURE (IN. WG)
0.3
0.4
0.5
0.6
0.7

Watts

375

377

371

362

354

350

Cfm

1202

1170

1079

976

884

807

469
1174

449
988

Wa_s
Cfm

435
828

WaHs

462

451

431

411

394

381

Cfm

1374

1290

1205

1116

1020

916

Watts

523

506

499

471

449

426

Cfm
Watts
Cfm

1500

1408
645
1474

1301
628
1369

1190
610
1267

1082
595
1169

977
584
1069

575
962

Watts
Cfm

620
1662

600
1621

586
1581

574
1540

562
1496

548
1447

530
1392

0.8

0.9

1.0

428
718

510
1331

487

462

439

1263

1186

1103

Wa_s

686

661

634

606

577

547

517

Cfm

1722

1662

1594

1515

1427

1330

1227

757
1669

730

704

682

1577

1486

1402

1331

1263

WaHs
Cfm
WaSs

620

600

586

574

562

548

530

Cfm

1662

1621

1581

1540

1496

1447

1392

487

Watts

763

747

729

709

686

661

634

606

577

547

517

Cfm

1917

1868

1822

1774

1722

1662

1594

1515

1427

1330

1227

852
1982

832
1914

809
1839

784
1757

757
1669

730

704

682

1577

1486

1402

Wa_s
Cfm

I
I

Watts

597

592

578

526

460

452

445

Cfm

2265

2190

2101

2033

1974

1869

1614

Watts
Cfm

754
2383

730
2282

707
2202

687
2134

671
2070

658
2005

646
1935

630
1858

603

558

486

1771

1667

1576

Wa_s
Cfm

901
2480

876
2383

856
2301

836
2233

813
2175

785
2122

755
2066

723
1998

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

Step 4---Outdoor fan

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

1. Inspect

the fan blades

for cracks

2. If fan needs to be removed,

base.

intake grille and remove
3. Loosen

Inspect the drain pan and condensate
drain line when inspecting
the coils. Clean the drain pan and condensate drain by removing all

the setscrew

or bends.

remove screws holding outdoor

air

grille.

and slide the fan off the motor shaft.

foreign matter from the pan. Flush the pan and drain trough with
clear water. Do not splash water on the insulation, motor, wiring,

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) .

or air filter(s).

5. Ensure

If the drain

trough

is restricted,

clear

it with

"plumbers snake" or similar probe device. Ensure that the auxiliary
drain port above the drain trough is also clear.

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

200

30.0

400

-1

SUCTION

panel

700

LIN E TEMPERATURE

Fig. 24_Cooling
access

60.0

SUCTION
L,NETEMPERATURE_T

-7

Remove

50.0

CHART

(°C)

(036) 60HZ CHARGING

125

115

105

I
30.0
40.0
50.0
60.0
SUCTION LINE TEMPERATURE I°Fq
] ......
J
I
I
-7
-1
4
10
16

80.0

20.0

r
27
50JS500089

SUCTION LINE TEMPERATURE

C00028

Fig. 25_Cooling

Charging Chart, 50JSO30

to locate

all the electrical

controls

CHART

Step 8--Metering

and

70.0

B0.0

I
27

(_C)

50JS500090

Charging Chart, 50JS 036 uncial
_ 29
device

wiring. Check all electrical connections
for tightness. Tighten all
screw connections.
If any smoky or burned connections
are

Refrigerant metering devices are fixed orifices and are located in
the inlet header to the indoor and outdoor coils.

noticed, disassemble the connection, clean all the parts, restrip the
wire end and reassemble the connection properly and securely.

Step 9_Liquid

After inspecting the electrical controls and wiring, replace all the
panels. Start the unit, and observe at lea_st one complete cooling

label when making

NOTE: Refer to the Sequence of Operation
determining proper control operation.
Step

6---Rsfrigerant

Step 10_High

as an aid in

circuit

thermostat
is satisfied.
This delay enables
residual cooling in coil after compression

leak-test

sec., fan relay is energized.

all

leaks are found and low performance
and Adjusting

Step 7--1ndoor

airflow

The indoor
performance

airflow does
is suspected.

Refrigerant

Charge

When

thermostat

is satisfied,

an off

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.

Leaks section.

refer to Checking

blower to remove
shutdown,
thereby

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

refrigerant tubing using an electronic leak detector, or liquid-soap
solution. If a refrigerant
leak is detected,
refer to Check for

If no refrigerant

control, recycle
for 60 sec. after

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

serious injury or death. Use all service ports and open all
flow-control devices, including solenoid valves.
is suspected,

hot gas and
these valves

relay

The Time-Delay
Relay (TDR) is a solid-state
delay timer which keeps indoor blower operating

System under pressure.
Relieve pressure and recover all
refrigerant before system repair or final unit disposal to avoid

Refrigerant

Flow Valves

Step 11--Time-delay

YT_'_L3,zP211] _

or if low performance

are made of

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.

Inspect all refrigerant tubing connections and the unit base for oil
accumulation
annually. Detecting oil generally indicates a refrigerant leak.

If oil is detected

devices)

High flow valves are located on the compressor
suction tubes. Large black plastic caps distinguish

these checkouts.

section

(to protect metering

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

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 instrumentation. Refer to the unit wiring

line strainers

The liquid line strainers

is suspected,
section.

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.
psig and closes at 22 psig. No adjustment

not require checking unless improper
If a problem
exists, be sure that all

This switch opens at 7
is necessary.

supply- and return-air grilles are open and free from obstructior_;,
and that the air filter is clean. When necessary, refer to Indoor

NOTE: Because
these switches
are attached
to refrigeration
system under pressure, it is not advisable to remove this device for

Airflow
airflow.

troubleshooting
unless you are re;_onably
exists. If switch must be removed, remove

and Airflow

AdjustmenL_

section

to check

the system

certain that a problem
and recover all system

(042.) 60HZ CHARGING

CHART

(048) 60HZ CHARGING

CHART

,4Jq
6891 100

125
115

52
46

105

-4.._

95 35 I
8s 29 I
7s 241
65

18 I

131

71
i i

i i

: I I
i I I

I
I

lU)

I
I !

[

I!111

3°° ,oo
SUCTION
-7

LiNE TEMPERATURE

-1
SUCTION

Fig. 26--Cooling

4
10
16
LINE TEMPERATURE (°C)

Charging

Chart,

20.0

(°F_
21

I
_7

27
50JS50009

300

400

500

61_0

SUCTION LIN E TEMPERATURE !_F)
!
I
I
I
-1
4
10
16
SUCTION

Fig. 27--Cooling

50JS 042 unC_l_
°3°

Illil

207!

,o.o 8o.0 i

LINE TEMPERATU

70.o

so.o

J
i

(°C)

i
I

50JS5000921

Charging Chad, 50JS 048 Un_=_31

(D60) 60HZ CHARGING CHART

20.0
I
7

30.0
400
SUC_ONL_ETEMPERATURE°_(
I
I
I
1
4
10

Fig. 28--Cooling
charge so that pressure gauges read 0 psi. Never
without breaking vacuum with dry nitrogen.
Step 13_Check

defrost

open system

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.

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

TROUBLESHOOTING

and on most

Refer to the Cooling and Heating Troubleshooting
11 ) for troubleshooting
information.

are right for

Use the Start-Up Checklist
followed.

Thermostat

Defrost

thermostat

defrost

or that conditions

START-UP

signals heat pump that conditions
have changed

I
27

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.

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

Step 14--Defrost

J
21

_ 32
Charging Chart, 50JS 060 UnCi_=

thermostat

that there is only 1 stub tube used with liquid header,
units it is the bottom circuit.

80.0
!
16

to terminate

defrost. It is

Chart (Table

CHECKLIST

to ensure proper start-up procedures

are

Fig. 29_Cooling

Fig. 30_Cooling

Charging

Charging Chart, 50JX 030 Un_tl_32

Chart, 50JX 036 Un_

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

ill

, I

_ ............

;

*_
_x_o_23

C99035

Fig, 32--Cooling

Charging

Chart, 50JX

C99036

048 Units

Fig. 33_Cooling

Charging

Chart, 50JX 060 Units

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

SIZE

20X20X1

1300

CFM
1400

1500

0.13

0.14

0.15

0.16

0,07

0.08

0,09

0,10

500

600

700

800

900

1000

1100

1200

0.05

0.07

0.08

0.10

0.12

0.13

0,14

0.15

0.09

0.10

0.11

20 X 24 X 1
24 X 30 X 1

Table 10_ELECTRIC

1600

1700

1800

1900

2000

2100

2200

2300

0,11

0.12

0,13

0.14

0.15

0.16

0,17

0,18

HEAT PRESSURE DROP TABLE
Small Cabinet

STATIC

CFM
500

600

700

800

900

1000

1100

1200

1300

1400

1500

1600

5 kW

0.O0

0.00

0.02

0.04

0.06

0.07

10 kW

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

0.02

0.04

0,06

0,08

0,09

0,11

0,13

0.15

0.17

0.10

I
I

Large Cabinet
STATIC

CFM
1100

1200

1300

1400

1500

1600

1700

1800

1900

2000

2100

2200

2300

2400

2500

5 kW

0.00

0.0O

0.01

0.02

0.03

0.04

0.05

0.06

0.07

0.09

0.10

0.11

0,12

10 kW

0.00

0,00

0.01

0,02

0.03

0.04

0.05

0.06

0.07

0.08

0.09

0.10

0.11

0.12

0.13

15 kW

0.00

0.02

0.03

0,04

0,05

0.06

0.07

0.08

0.09

0.10

0.11

0.12

0.13

0.14

0.15

20 kW

0.02

0,03

0.04

0,05

0.06

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

Fig. 34_Refrigerant

Circuit

C99097

C99092

Table 11--Cooling and Heating Troubleshooting Chart
CAUSE

SYMPTOM

Compressor and outdoor
fan will not start

Compressor
will not start
but condenser
fan runs

Three-phase scroll compressor (size 030060 units) makes excessive noise, and
there may be a low pressure differential

Call power company

Fuse blown or circuit breaker tripped
Defective thermostat, contractor, transformer,
control relay or detrost board

Replace fuse or reset circuit breaker

Insufficient line voltage

Determine cause and correct

Incorrect or faulty wiring

Check wiring diagram and rewire correctly

Thermostat setting too high

Lower thermostat setting below room
temperature

Units have a 5-minute time delay

DO NOT bypass this compressor time
delay-waft for 5 minute until time,delay relay is
de-energized

Faulty wiring or loose connections in compressor
circuit

Check wiring and repair or replace

Compressor motor burned out, seized, or
internal overload open

Determine cause.
Replace compressor

Defective run capacitor, overfoad, or PTC
(positive temperature coefficient) thermistor

Determine cause and replace

Defective run capacitor, overload, or PTC (positive temperature coefficient) thermistor

Determine

One leg of 3-phase power dead

Replace f,Jse or reset
Determine
cause

Scrst] compressor is rotating in the wrong
direction

Correct the direction of rotation by reversing the
3-phase power leads to the unit

Refrigerant overcharge or undercharge

Recover refrigerant, evacuate system, and
recharge to capacities shown on nameplate

Dateetive compressor

Determine

Defective run/start capacitor, ovedoad or start
relay
Defective thermostat
Faulty outdoor-fan

motor or capacitor

and

correct

Determine cause and replace
Replace thermostat
Replace

Replace filter

Thermostat set too low

Reset thermostat

Low refrigerant charge

Locate leak, repair, and recharge
Replace compressor

Decrease load or increase unit size

Check defrost time settings
Reset

necessary

Check defrost temperature switch
Replace as necessary
Recover refrigerant, evacuate system,
and recharge
Clean coil or remove restdcgon

Dirty air tiger

low

cause

Locate restriction and remove

Outdoor coil didy or restricted

too

circuit breaker

Dirty air filter
Unit undersized for load

Air in system

pressure

replace

Determine cause and correct

Frosted coil with incorrect defrost operation

Head

and

Restriction in refggerant system

operates continuously

Excessive head pressure

cause

Damaged reversing valve

Leaking valves in compressor
Compressor

Replace component

Replace and determine cause
Determine cause and correct

Insufficient line voltage
Blocked outdoor coft
Compressor cycles
(other than normally satisfying thermostat)

REMEDY

Power Failure

Dirty indoor or outdoor coil

Replace filter
Clean coil

Refrigerant overcharged

Recover excess refrigerant

Air in system

Recover refrigerant, evacuate system,
and recharge

(Heat) Indoor air restricte_ or recirculating

Determine cause and correct

indoor or outdoor air restdcted or air short_ycling

Determine cause and correct

Low refrigerant charge

Check for leaks, repair and recharge

Compressor valves leaking
Restriction in liquid tube

Replace compressor
Remove restriction

(Heat) Outdoor coft frosted

Move timer on control board to 30 minute between
defrost cycles
Check for source and eliminate

Excessive

suction

pressure

Compressor valves leaking

Replace compressor

Reversing valve hung up or leaking intemafty

Replace valve
Recover excess refrigerant

(Continued

page)

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

CAUSE

REMEDY

(Cool) Dirty air filter

RepIace filter

(Heat) Outdoor coil frosted

Move timer on control board to 30 minute
between defrost cycles

Low refrigerant charge

Check for leaks, repair and reCharge
Remove source of restriction

Metering device or low side restricted

Suction pressure too low

Increase air quantity
Check filter-replace if necessary
Beset thermostat

(Cool) Insufficient coil airflow
(Cool) Temperature too low in conditioned area

Compressor runs but outdoor fan does not

IFM* does not run

IFM* runs when it should be off

IFM* operaSon is intermittent
* IFM4ndoor

(Cool) Outdoor ambient below 40 ° F
Field-installed filter-drier restricted

Install Iow-_.mbient kit

NC (normally closed) contacts on defrost beard
open

Check condition of relay on board
Replace if necessary

Blower wheel not secured to shaft
insufficient voltage at motor

Properly tighten blower wheel to shaft
I_etermine
cause
and correst

RepLace

Power connectors not properly sea{ed

Connectors should snap easily; do not force

Motor programmed with a delay profile

Allow a few minute for motor 1o shut off

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

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

Water ddpping into motor

Verify proper drip loops in connector wires

Connectors not firmly sealed

Gently pull wires individually to be sure they are
crimped into the housing

Fan Motor

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

Remove

that an packing

Verify

all shipping

materials
holddown

that condensate

Check

all electrical

Check

that indoor

Verify

Check

connection

connections

propeller

and brackets

is installed

from

unit

per installation

and terminals

(evaporator)

that unit installation
fan wheel

have been removed
bolts

instructions

for tightness

air filter is clean

and in place

is level
for location

in housing

and setscrew

tightness

Ul, START-UP
Supply Voltage:
Compressor
Indoor

L1-L2 --

Amps:

L2-L3 --

L3-L1

Fan Amps:

TEMPERATURE
Outdoor-Air
Return-Air
Heat Pump
Electric
PRESSURES

Temperature:
Temperature:

DE}

Supply Air:

Heater

Supply Air:

Refrigerant

Suction

Refdgerant

Discharge

psig
psig

Verify Refrigerant charge using charging tables

Verify that 3-phase scroll compressor is rotating in correct direction

IN 46231

Manufacturer reserves the right to discontinue, or change at any time, specifications
Book 1 4
Tab 6 8
PC 101
Printed in U.S.A.
Catalog No. 50JS,JX-6Sl

or designs without notice and without incurring obligations.
Pg 26

2-0_

Replaces:

New

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CARRIER Package Units(both Units Combined) Manual L0604564

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