User manual | Carrier 50JS JX018-060 heat pump unit Installation, Start-Up and Service Instructions

50JS,JX018-060

Single-Package Heat Pump Units

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Installation, Start-Up and Service Instructions

NOTE: Read the entire instruction manual before starting the installation.

Index

SAFETY CONSIDERATIONS ...............................................1-4

General .................................................................................

4

RECEIVING AND INSTALLATION..................................4-15

Check Equipment......................................................................4-5

Identify Unit..............................................................................4

Inspect Shipment.......................................................................5

Provide Unit Support...................................................................5

Roof Curb..................................................................................5

Slab Mount................................................................................5

Ground Mount...........................................................................5

Provide Clearances.......................................................................5

Rig and Place Unit....................................................................5-6

Select and Install Ductwork ....................................................6-8

Converting Horizontal Discharge Units to Downflow (Vertical)

Discharge...................................................................................6

Provide for Condensate Disposal ............................................6-8

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

High-Voltage Connections........................................................8

Routing Power Leads Into Unit ..........................................8-14

Connecting Ground Lead to Ground Lug..............................14

Special Procedures for 208-V Operation ...............................15

PRE-START-UP.........................................................................15

START-UP.............................................................................15-20

Check for Refrigerant Leaks ..................................................15

Unit Start-Up Adjustment .................................................15-20

MAINTENANCE ..................................................................20-23

SYSTEM INFORMATION.......................................................23

Time Delay Relay...................................................................23

Pressure Switches....................................................................23

Defrost Thermostat .................................................................23

TROUBLESHOOTING .......................................................24-25

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 equipment 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 basic 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.

Fig. 1—Model 50JS/JX

C99001

Improper installation, adjustment, alteration, service, maintenance, 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-alert symbol .

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 the utility must be sufficient to handle load imposed by this unit.

3. This installation must conform 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.

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

Book 1 4

Tab 5a 5a

PC 101 Catalog No. 565-057 Printed in U.S.A.

Form 50JS,JX-1SI Pg 1 5-00 Replaces: 50JX-2SI

REQUIRED CLEARANCE TO COMBUSTIBLE MATL.

INCHES [mm]

TOP OF UNIT ...................................................................................14.00 [355.6]

DUCT SIDE OF UNIT.........................................................................2.00 [50.8]

SIDE OPPOSITE DUCTS ................................................................14.00 [355.6]

BOTTOM OF UNIT .............................................................................0.50 [12.7]

ELECTRIC HEAT PANEL .................................................................36.00 [914.4]

NEC. REQUIRED CLEARANCES.

INCHES [mm]

BETWEEN UNITS, POWER ENTRY SIDE ....................................42.00 [1066.8]

UNIT AND UNGROUNDED SURFACES, POWER ENTRY SIDE .36.00 [914.0]

UNIT AND BLOCK OR CONCRETE WALLS AND OTHER

GROUNDED SURFACES, POWER ENTRY SIDE.........................42.00 [1066.8]

UNIT

50JS018

50JS024

50JS030

50JS036

50JS042

50JX024

50JX030

50JX036

REQUIRED CLEARANCE FOR OPERATION AND SERVICING

INCHES [mm]

EVAP. COIL ACCESS SIDE............................................................36.00 [914.0]

POWER ENTRY SIDE....................................................................42.00 [1066.8]

(EXCEPT FOR NEC REQUIREMENTS)

UNIT TOP .......................................................................................48.00 [1219.2]

SIDE OPPOSITE DUCTS ..............................................................36.00 [914.0]

DUCT PANEL .................................................................................12.00 [304.8] *

*MINIMUM DISTANCES: IF UNIT IS PLACED LESS THAN 304.8 [12.00] FROM

WALL SYSTEM, THEN SYSTEM PERFORMANCE MAYBE COMPROMISE.

C99007

ELECTRICAL CHARACTERISTICS

208/230-1-60

208/230-1-60

208/230-1-60, 208/230-3-60

208/230-1-60, 208/230-3-60, 460-3-60

208/230-1-60, 208/230-3-60, 460-3-60

208/230-1-60

208/230-1-60,208/230-3-60

208/230-1-60,208/230-3-60, 460-3-60

UNIT WEIGHT

291

323

299

320

328 lb

283

289

287 kg

128.4

131.1

130.2

132.0

146.5

135.6

145.2

148.8

UNIT HEIGHT

IN. [MM]

"A"

37.02 [940.3]

39.02 [991.1]

39.02 [991.1]

37.02 [940.3]

37.02 [940.3]

41.02 [1041.9]

37.02 [940.3]

37.02 [940.3]

X

19.5 [495.3]

18.5 [469.9]

19.5 [495.3]

19.5 [495.3]

19.5 [495.3]

19.0 [482.6]

20.0 [ 508]

20.0 [508]

CENTER OF GRAVITY

IN. [MM]

Y

16.8 [425.5]

16.8 [425.5]

17.5 [444.5]

17.8 [450.9]

17.8 [450.9]

18.3 [463.6]

19.3 [ 489.0]

19.0 [482.6]

Z

15.0 [381.0]

15.0 [381.0]

15.0 [381.0]

13.0 [330.2]

13.0 [330.2]

16.0 [406.4]

17.6 [447.0]

16.5 [419.1]

Fig. 2—50JS018-042/50JX024-036 Unit Dimensions

2

REQUIRED CLEARANCE TO COMBUSTIBLE MATL.

INCHES [mm]

TOP OF UNIT ...................................................................................14.00 [355.6]

DUCT SIDE OF UNIT.........................................................................2.00 [50.8]

SIDE OPPOSITE DUCTS ................................................................14.00 [355.6]

BOTTOM OF UNIT .............................................................................0.50 [12.7]

ELECTRIC HEAT PANEL .................................................................36.00 [914.4]

NEC. REQUIRED CLEARANCES.

INCHES [mm]

BETWEEN UNITS, POWER ENTRY SIDE ....................................42.00 [1066.8]

UNIT AND UNGROUNDED SURFACES, POWER ENTRY SIDE .36.00 [914.0]

UNIT AND BLOCK OR CONCRETE WALLS AND OTHER

GROUNDED SURFACES, POWER ENTRY SIDE.........................42.00 [1066.8]

UNIT

50JS048

50JS060

50JX042

50JX048

50JX060

REQUIRED CLEARANCE FOR OPERATION AND SERVICING

INCHES [mm]

EVAP. COIL ACCESS SIDE............................................................36.00 [914.0]

POWER ENTRY SIDE....................................................................36.00 [914.0]

(EXCEPT FOR NEC REQUIREMENTS)

UNIT TOP .......................................................................................48.00 [1219.2]

SIDE OPPOSITE DUCTS ..............................................................36.00 [914.0]

DUCT PANEL .................................................................................12.00 [304.8] *

*MINIMUM DISTANCES: IF UNIT IS PLACED LESS THAN 304.8 [12.00] FROM

WALL SYSTEM, THEN SYSTEM PERFORMANCE MAYBE COMPROMISE.

C99006

ELECTRICAL CHARACTERISTICS

208/230-1-60, 208/230-3-60, 460-3-60

208/230-1-60, 208/230-3-60, 460-3-60

208/230-1-60, 208/230-3-60, 460-3-60

208/230-1-60, 208/230-3-60, 460-3-60

208/230-1-60, 208/230-3-60, 460-3-60

UNIT WEIGHT lb

353

418

350

355

428 kg

160.1

189.6

158.8

161.0

194.1

UNIT HEIGHT

IN. [MM]

"A"

38.98 [990.2]

38.98 [990.2]

40.98 [1040.9]

40.98 [1040.9]

42.98 [1091.7]

X

20.5 [520.7]

CENTER OF GRAVITY

IN. [MM]

Y

20.6 [523.8]

Z

17.0 [431.8]

19.5 [495.3]

21.0 [533.4]

20.0 [508.0]

21.0 [533.4]

19.8 [501.7]

20.5 [520.7]

21.3 [539.8]

20.0 [508.0]

17.0 [431.8]

16.6 [421.6]

18.0 [457.2]

17.6 [447.0]

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

3

46 3/16

44 5/16

SIDE PANEL

0.75"

3.0"

BASE PAN

BOTTOM SUPPLY

SUPPORT RIB(S)

SEAL STRIP

(FACTORY SUPPLIED)

COUNTER FLASHING

(FIELD SUPPLIED)

ROOFING FELT

(FIELD SUPPLIED)

CANT STRIP

(FIELD SUPPLIED)

ROOFING MATERIAL

(FIELD SUPPLIED)

NAILER

INSULATION

4.0"

(FIELD SUPPLIED)

B

17 3/8

TYP.

D

C

A99340

1 TYP.

7/8

3

13/16

SUPPORT B

A

B

SUPPORT A (2)

SIDE

(2)

2

END VIEW

END

(2)

DECK PAN (INSULATED)

UNIT SIZE

50JS018-042

50JS048-060

50JX024-036

50JX042-060

ODS CATALOG NUMBER

CPRFCURB006A00

CPRFCURB007A00

CPRFCURB008A00

CPRFCURB009A00

A

IN. [MM]

8 [203]

14 [356]

8 [203]

14 [356]

Fig. 4—Roof Curb Dimensions

NOTES:

1. Dimensions in [ ] are in millimeters.

2. Roof curb is made of 16 gage steel.

3. Table lists only the dimensions per part number that have changed.

4. Insulated panels: 1-in. thick fiberglass 1 lb density.

B

IN. [MM]

11-27/32 [301]

11-27/32 [301]

15/27/32 [402]

15-27/32 [402]

Before performing service or maintenance operations on system, turn off main power to unit. Turn off accessory heater power switch if applicable. Electrical shock could cause severe injury or death.

Step 1—General

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

C

IN. [MM]

30-5/8 [778]

30-5/8 [778]

42-18/ [1070]

42-1/8 [1070]

A99320

D

IN. [MM]

28-3/4 [730]

28-3/4 [730]

40-1/4 [1022]

40-1/4 [1022] shipped in a horizontal-discharge configuration for installation on a ground-level slab. Standard 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 papers.

4

INSPECT SHIPMENT — Inspect for shipping damage while unit is still on shipping pallet. If unit 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. Manufacturer is not responsible for any damage incurred in transit. Check all items against shipping list.

Immediately notify the nearest Carrier 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. 4). 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 gasketing 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. 5). This is necessary for unit drain to function properly. Refer to accessory roof curb installation instructions for additional information as required.

A

B

OPTIONAL

RETURN

AIR

OPENING

C

MAXIMUM ALLOWABLE

DIFFERENCE (in.)

A-B

1/4

B-C

1/4

A-C

1/4

C99065

Fig. 5—Unit Leveling Tolerances

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.

6). 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.

OPTIONAL

SUPPLY

AIR

OPENING

2"

EVAP. COIL COND. COIL

C99096

Fig. 6—Slab Mounting Detail

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 outdoor air must be provided. The outdoor fan draws air through the outdoor coil and discharges it through the top fan grill. Be sure that the fan discharge does not recirculate to the outdoor coil. Do not locate the unit in either a

5 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 over-hang must not exceed 36 in. For extended overhangs, provide a minimum clearance of 36 in.

IMPORTANT: Do not restrict outdoor airflow. An air restriction at either the outdoor-air inlet or the 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, tile, 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.

2. Position the lifting bracket assembly around the base of the unit. Be sure the strap does not twist.

3. Place each of the 4 metal lifting brackets into the handholds 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. 7.

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.

HANDHOLD

HOOK

FEED

Fig. 7—Threading Belt

C99067

5. Tighten the tension buckle until it is taut. Lifting brackets must be secure in the handholds.

6. Attach field-supplied clevis or hook of sufficient strength to hole in the lifting bracket (See Fig. 8).

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

4 rigging brackets. DO NOT attach the safety straps to the lifting brackets (See Fig. 8).

“B”

SEE DETAIL A

“A”

914-137"

(36"-54")

DETAIL A

SCALE 0.250

TIGHTEN STRAPPING SECURELY

WITH TENSION BUCKLE

INSTALL SAFETY STRAPS TO

RIGGING CLEVIS AT 4 RIGGING BRACKETS

PLACE RIGGING BRACKET ASSEMBLY IN 4

HAND HOLES AND INSTALL TIE DOWN STRAP

AROUND PERIMETER OF UNIT AND THROUGH

SPACE IN BRACKET ASSEMBLY

C99075

UNIT

Size

50JS018

50JS024

50JS030

50JS036

50JS042

50JS048

50JS060

50JX024

50JX030

50JX036

50JX042

50JX048

50JX060

350

372

377

450

375

440

321

342

MAXIMUM WEIGHT lb.

kg.

305

311

138.4

141.1

309

313

345

140.2

142.0

156.4

170.1

199.6

145.6

155.2

158.8

168.8

171.0

204.2

20.5

19.5

19.0

20.0

20.0

21.0

20.0

21.0

in.

19.5

18.5

19.5

19.5

19.5

Fig. 8—Suggested Rigging

A

520.7

495.3

482.6

508

508

533.4

508

533.4

mm.

495.3

469.9

495.3

495.3

495.3

20.62

19.75

18.25

19.25

19.0

20.5

21.25

20.0

B in.

16.75

16.75

17.50

17.75

17.75

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.

523.8

501.7

463.6

489

482.6

520.7

539.8

508.0

mm.

425.5

425.5

444.5

450.9

450.9

Step 5—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 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, Refrigeration, 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 the following:

6

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.

1. All units should have field-supplied filters or accessory filter rack installed in the return-air side of the unit. Recommended sizes for filters are shown in Tables 1A and 1B.

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 2A and 2B. 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) minimum installation standards for residential heating 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.

CONVERTING HORIZONTAL DISCHARGE UNITS TO

DOWNFLOW (VERTICAL) DISCHARGE UNITS

Before performing service or maintenance operations on system, turn off main power to unit. Turn off accessory heater power switch if applicable. Electrical shock could cause serious injury or death.

1. Open all electrical disconnects before starting any service work.

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

3. Use a screwdriver and hammer to remove the panels in the bottom of the base pan.

4. Reinstall the side duct covers to block off the horizontal air openings.

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

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.

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


Size (in.)

Motor (HP)

RETURN-AIR FILTERS (in.)

Throwaway

2400

22

1/8 (825)

2....15

3.7

700

10x10

1/8

20x20x1

50JS018

1-1/2

283

5.6

0.053

0.040

1....17

10.2

Table 1A—Physical Data

50JS024

2

289

50JS030

2-1/2

287

50JS036

2-1/2

291

1

RECIPROCATING COMPRESSOR

5.2

0.061

0.049

1....17

12.0

5.8

0.068

[email protected]

1....17

12.0

R-22

Accurater ®

7.1

0.078

[email protected]

2....17

10.3

2400

22

1/8 (825)

2....15

3.7

800

10x10

1/4

20x20x1

2400

22

1/8 (825)

3....15

3.7

1000

11x10

1/4

20x20x1

2800

22

1/4 (1100)

3....15

3.7

1200

11x10

1/2

20x24x1

50JS042

3-1/2

323

Table 1B—Physical Data

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


Diameter

Motor HP (RPM)

INDOOR COIL

Rows...Fins/in.

Face Area (Sq Ft)

INDOOR BLOWER


Size (in.)

Motor (HP)

RETURN-AIR FILTERS (in.)

Throwaway

50JX024

2

299

5.5

0.065

0.055

1...17

14.6

2350

22

1/8 (825)

3...15

3.7

800

10x10

1/4

20x20x1

50JX030

2 1/2

320

6.4

0.073

0.065

2...17

10.9

2350

22

1/8 (825)

3...15

3.7

1000

11x10

1/4

20x20x1

NOTE: Air filter pressure drop for non-standard filters must not exceed 0.08 in. wg.

50JX036

3

50JX042

3-1/2

328 350

1

SCROLL COMPRESSOR

R-22

Accurater ®

7.0

0.076

0.067

10.8

0.080

[email protected]

2...17

10.9

2800

22

1/4 (1100)

4...15

3.7

1200

11x10

1/2

20x24x1

2...17

14.4

2800

22

1/8 (825)

4..15

4.7

1400

11x10

3/4

24x30x1

7.6

0.078

[email protected]

2....17

10.3

2400

22

1/8 (825)

4....15

3.7

1250

11x10

3/4

24x30x1

50JS048

4

353

SCROLL COMPRESSOR

50JX048

4

355

10.4

0.088

[email protected]

2...17

14.4

3300

22

1/4 (1100)

4...15

4.7

1600

11x10

3/4

24x30x1

7.8

0.088

[email protected]

2....17

11.6

3300

22

1/4 (1100)

3....15

4.7

1600

11x10

3/4

24x30x1

50JS060

5

418

8.6

0.093

[email protected]

2....17

11.6

3300

22

1/4 (1100)

4....15

4.7

2000

11x10

1

24x30x1

50JX060

5

420

12.3

0.0.93

[email protected]

2...17

16.4

3300

22

1/4 (1100)

4...15

5.7

2000

11x10

1

24x30x1

SIZE

AIRFLOW (CFM)

Table 2A—Minimum Airflow for Reliable Electric Heater Operation (Cfm)

50JS018

650

50JS024

800

50JS030

1000*

50JS036

1200

50JS042

1400

50JS048

1600

Table 2B—Minimum Airflow for Reliable Electric Heater Operation (Cfm)

SIZE

AIRFLOW (CFM)

50JX024

800

50JX030

1000*

50JX036

1200

50JX042

1400

* The 030 size models must be run on medium or high speed when used in conjunction with 15 Kw electric heat accessory.

50JX048

1600

50JS060

2000

50JX060

2000

7

INDOOR

THERMOSTAT

RETURN

AIR

TOP COVER

FROM

POWER

SOURCE

Fig. 9—Typical Installation

DISCONNECT

PER NEC

C99061

1” MIN.

Fig. 11—Condensate Trap

Step 7—Install Electrical Connections

TRAP

OUTLET

2” MIN.

C99013

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 Protection Association (latest edition) (in Canada, Canadian Electrical Code CSA C22.1) and local electrical codes. Failure to adhere to this warning could result in serious injury or death.

Accessory Duct Covers

C99030

Fig. 10—50JX with Duct Covers On

(Unit shown with optional louvered grille)

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 installations. 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 least 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 a field-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 least 1 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 a slope of at least 1 in. every 10 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.

8

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 connections must be in accordance with CSA standard C22.1

Canadian Electrical Code Part 1 and applicable local codes. Refer to unit wiring diagram.

2. Use only copper conductor for connections between field-supplied electrical disconnect switch and 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 3-phase units, ensure phases are balanced within 2%. Consult local power company for correction of improper voltage and/or phase imbalance.

4. Insulate low-voltage wires for highest 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.

HIGH-VOLTAGE CONNECTIONS — The unit must have a separate electrical service with a field-supplied, waterproof disconnect switch mounted at, or within sight from the unit. Refer to the unit rating plate, NEC and local codes for maximum fuse/circuit breaker size and minimum circuit amps (ampacity) for wire sizing (See Tables 3A and 3B for electrical data).

The field-supplied disconnect may be mounted on the unit over the high-voltage inlet hole (See Figs. 2-3).

If the unit has an electric heater, a second disconnect may be required. Consult the Installation, Start-Up and Service Instructions provided with the accessory for electrical service connections.

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

FIELD SPLICE

TERMINAL (MARKED)

TERMINAL (UNMARKED)

SPLICE

SPLICE (MARKED)

FACTORY WIRING

FIELD CONTROL WIRING

FIELD POWER WIRING

ACCESSORY OR OPTIONAL

WIRING

TO INDICATE COMMON

POTENTIAL ONLY:

NOT TO REPRESENT WIRING

LEGEND

AHA

C

CAP

CB

ADJUSTABLE HEAT ANTICIPATOR

CONTACTOR

CAPACITOR

CIRCUIT BREAKER

COMP COMPRESSOR MOTOR

CTD

DB

DFT

DR

COMPRESSOR TIME DELAY

DEFROST BOARD

DEFROST THERMOSTAT

DEFROST RELAY

EQUIP EQUIPMENT

FU

GND

HR

FUSE

GROUND

HEATER RELAY

HTR

IFM

LPS

OFM

HEATER

INDOOR FAN MOTOR

LOW PRESSURE SWITCH

OUTDOOR FAN MOTOR

QT

S.B.

TC

QUADRUPLE TERMINAL

RVS REVERSING

SLOW BLOW FUSE

THERMOSTAT - COOLING

TDR

TH

TIME DELAY RELAY

THERMOSTAT - HEATING

TRAN TRANSFORMER

NOTES:

1. IF ANY OF THE ORIGINAL WIRES FURNISHED ARE REPLACED, IT MUST BE

REPLACED WITH TYPE 90 DEGREE C WIRE OR IT’S EQUIVALENT.

2. SEE PRICE PAGES FOR THERMOSTAT AND SUBBASES.

3. USE 75 DEGREE COPPER CONDUCTORS FOR FIELD INSTALLATION.

4. FOR HIGH SPEED IFM, DISCONNECT RED

WIRE FROM TDR 3 AND CONNECT BLK WIRE FROM IFM.

FOR MEDIUM SPEED, DISCONNECT RED WIRE

FROM TDR 3 AND CONNECT BLU WIRE FROM IFM.

5. DEFROST TIMER TO BE SET AT 90 MINUTES EXCEPT FOR 50JS048, 060 MODELS

SET AT 50 MINUTES.

Fig. 12—Wiring Schematics

9

A00073


A00074

LEGEND

FIELD SPLICE

TERMINAL (MARKED)

TERMINAL (UNMARKED)

SPLICE

SPLICE (MARKED)

FACTORY WIRING

FIELD CONTROL WIRING

FIELD POWER WIRING

ACCESSORY OR OPTIONAL

WIRING

TO INDICATE COMMON

POTENTIAL ONLY:

NOT TO REPRESENT WIRING

AHA

C

ADJUSTABLE HEAT ANTICIPATOR

CONTACTOR

CAP

CB

CAPACITOR

CIRCUIT BREAKER

COMP COMPRESSOR MOTOR

CTD

DB

DFT

DR

COMPRESSOR TIME DELAY

DEFROST BOARD

DEFROST THERMOSTAT

DEFROST RELAY

EQUIP EQUIPMENT

GND

HR

HTR

IFM

LPS

OFM

OFR

QT

GROUND

HEATER RELAY

HEATER

INDOOR FAN MOTOR

LOW PRESSURE SWITCH

OUTDOOR FAN MOTOR

OUTDOOR FAN RELAY

QUADRUPLE TERMINAL

RVS REVERSING

TC

TDR

TH

THERMOSTAT - COOLING

TIME DELAY RELAY

THERMOSTAT - HEATING

TRAN TRANSFORMER

NOTES:

1. IF ANY OF THE ORIGINAL WIRES FURNISHED ARE REPLACED, IT MUST BE

REPLACED WITH TYPE 90 DEGREE C WIRE OR IT’S EQUIVALENT.

2. SEE PRICE PAGES FOR THERMOSTAT AND SUBBASES.

3. USE 75 DEGREE COPPER CONDUCTORS FOR FIELD INSTALLATION.

4. FOR HIGH SPEED IFM, DISCONNECT RED

WIRE FROM TDR 3 AND CONNECT BLK WIRE FROM IFM.

FOR MEDIUM SPEED, DISCONNECT RED WIRE

FROM TDR 3 AND CONNECT BLU WIRE FROM IFM.

5. DEFROST TIMER TO BE SET AT 90 MINUTES EXCEPT FOR 50JS048, 060 MODELS

SET AT 50 MINUTES.


11

A00075

Table 3A—Electrical Data—50JS

UNIT 50JS

SIZE

018

024

030

036

042

048

060

V-PH-HZ

208/230-1-60

208/230-1-60

208/230-1-60

208/230-3-60

208/230-1-60

208/230-3-60

460-3-60

208/230-1-60

208/230-3-60

460-3-60

208/230-1-60

208/230-3-60

460-3-60

208/230-1-60

208/230-3-60

460-3-60

VOLTAGE

RANGE

Min Max

187

187

187

187

187

187

414

187

187

414

187

187

414

187

187

414

253

253

253

253

253

253

506

253

253

506

253

253

506

253

253

506

COMPRESSOR

RLA

9

12.8

14.7

9.9

16.8

9.9

5.5

20.6

12.4

6.7

24.4

14.1

7.1

28.8

19.4

8

LRA

48

61

82

78

82

85

40

115

90

45

140

105

53

165

125

63

ODFM

FLA

0.9

0.9

0.9

0.9

1.5

1.5

0.8

0.9

0.9

0.8

1.5

1.5

0.8

1.5

1.5

0.8

IDFM ELECTRIC HEAT

3.8

3.8

1.8

3.5

3.5

1.8

6.2

6.2

-/-

3.8/5

7.5/10

11.3/15

15/19.94

-/-

5

10

15

20

-/-

3.8/5

7.5/10

11.3/15

15/20

-/-

3.8/5

7.5/10

11.3/15

15/19.94

-/-

5

10

15

20

-/-

3.8/5

7.5/10

11.3/15

15/19.94

-/-

5

10

15

15-20

-/-

3.8/5

7.5/10

11.3/15

15/20

FLA Nominal KW*

1.8

-/-

3.8/5

7.5/10

2

2

-/-

3.8/5

7.5/10

-/-

3.8/5

7.5/10

11.3/15

2

4.1

4.1

1.9

-/-

3.8/5

7.5/10

11.3/15

-/-

3.8/5

7.5/10

11.3/15

-/-

3.8/5

7.5/10

11.3/15

-/-

5

10

15

3.2

-/-

5

10

15

20

FLA

-/-

18.1/20.8

36.1/41.7

-/-

18.1/20.8

36.1/41.7

-/-

18.1/20.8

36.1/41.7

54.2/62.5

-/-

10.4/12

20.8/24.1

31.3/36.1

-/-

18.1/20.8

36.1/41.7

54.2/62.5

-/-

10.4/12

31.3/36.1

36.1/41.7

-/-

6.0

12.0

18.0

-/-

18.1/20.8

36.1/41.7

54.2/62.5

72.2/83.3

-/-

10.4/12

20.8/24.1

31.3/36.1

41.6/48

-/-

6.0

12.0

18.0

24.1

-/-

18.1/20.8

36.1/41.7

54.2/62.5

72.2/83.3

-/-

10.4/12

20.8/24.1

31.3/36.1

41.6/48.0

-

6.0

12.0

18.0

24.1

-/-

18.1/20.8

36.1/41.7

54.2/62.5

72.2/83.3

-/-

10.4/12

20.8/24.1

31.3/36.1

41.6/48.0

-

6.0

12.0

18.0

24.1

POWER SUPPLY

* Heater capacity (KW) based on heater voltage of 208v, 240v, and 480v. If power distribution voltage to unit varies from rated heater voltage, heater KW will vary accordingly.

22.6/22.6

22.6/22.6

30.4/34.4

43.5/49.5

56.3/64.3

11.5

11.5

17.3

24.8

32.3

43.7/43.7

43.7/43.7

52.9/59.8

75.4/85.9

98.0/111.9

30.5/30.5

30.5/30.8

49.9/56.8

72.4/82.9

95.0/108.9

20.2/20.2

20.2/20.2

30.8/34.8

43.8/49.9

56.7/64.7

11.0

11.0

17.3

24.8

32.3

35.5/35.5

35.5/35.5

49.5/56.5

72.1/82.5

94.6/108.5

MCA

14.0/14.0

24.8/28.3

47.4/54.3

18.9/18.9

25.1/28.5

47.6/54.6

21.3/21.3

25.1/28.5

47.6/54.6

72.8/83.3

15.3/15.3

15.5/17.5

28.6/32.6

44.2/50.2

26.6/26.6

27.7/31.2

50.3/57.2

72.8/83.3

18.0/18.0

18.2/20.2

44.2/50.2

47.8/54.7

9.6

9.9

17.4

24.9

32.0/32.0

32.0/32.0

33.8/37.8

46.8/52.9

59.7/67.7

14.0

14.0

19.0

26.6

34.1

Max Fuse or CRCT Breaker MOCP

20/20

25/25

50/60

-

-

-

25/25

25/30

50/60

25/25

25/30

50/60

-

-

-

-

-

-

-

80/90

25/25

25/25

35/40

45/60

15

15

20

25

20/20

20/20

30/35

45/60

35/35

35/35

60/60

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

80/90

-

-

-

90.0

100/110

-

-

-

-

60/70

-

-

-

-

-

-

-

-

90.0

100/110

-

-

-

-

-

-

-

-

-

60/70

30/30

30/30

35/35

45/50

-

15

15

20

25

35

60/60

60/60

60/60

-

-

15

15

20

25

35

45/45

45/45

50/60

-

-

40/40

40/40

50/60

-

-

25/25

25/25

35/35

45/50

-

-

-

-

90.0

100/125

40/40

40/40

35/40

50/60

-

20

20

20

30

35

-

-

-

-

-

-

-

-

-

60/70

12

→

Table 3B—Electrical Data—50JX

UNIT 50JX

SIZE

024

030

036

042

048

060

V-PH-HZ

208/230-1-60

208/230-1-60

208/230-3-60

208/230-1-60

208/230-3-60

460-3-60

208/230-1-60

208/230-3-60

460-3-60

208/230-1-60

208/230-3-60

460-3-60

208/230-1-60

208/230-3-60

460-3-60

VOLTAGE

RANGE

Min Max

187

187

187

187

187

414

187

187

414

187

187

414

187

187

414

253.00

253

253

253

253

506

253

253

506

253

253

506

253

253

506

COMPRESSOR

RLA

10.8

14

10.3

16.7

11.9

5.4

18.4

12.4

5.8

23.4

13.5

6.8

28.8

17.3

9

LRA

56

73

63

97

75

37.5

104

88

44

104

88

44

169

123

62

ODFM

FLA

0.90

0.9

0.9

1.6

1.6

0.9

0.9

0.9

0.9

1.6

1.6

0.9

1.4

1.4

0.9

IDFM ELECTRIC HEAT

4.1

2.0

4.1

4.1

2

6.2

6.2

3.2

-/-

5

10

15

20

-/-

3.75/5.0

7.5/10

11.3/15

15.0/20.0

-/-

3.75/5.0

7.5/10

11.3/15

15.0/20.0

-/-

5

10

15

20

-/-

3.75/5.0

7.5/10

11.3/15

15.0/20.0

-/-

5

10

15

20

-/-

3.75/5.0

7.5/10

11.3/15

15.0/20.0

-/-

3.75/5.0

7.5/10

11.3/15

15.0/20.0

FLA Nominal KW*

2

-/-

3.75/5.0

7.5/10

2.1

2.1

-/-

3.75/5.0

7.5/10

11.3/15

-/-

3.75/5.0

7.5/10

11.3/15

3.6

3.6

1.9

4.1

-/-

3.75/5.0

7.5/10

11.3/15

-/-

3.75/5.0

7.5/10

11.3/15

--/-

5

10

15

-/-

3.75/5.0

7.5/10

11.3/15

15.0/20.0

FLA

-/-

18.1/20.8

36.1/41.7

-/-

18.1/20.8

36.1/41.7

54.2/62.5

-/-

10.4/12.0

20.8/24.1

31.3/36.1

-/-

18.1/20.8

36.1/41.7

54.2/62.5

-/-

10.4/12.0

20.8/24.1

31.3/36.1

--/-

6

12

18

-/-

18.1/20.8

36.1/41.7

54.2/62.5

72.2/83.3

-/-

10.4/12.0

20.8/24.1

31.3/36.1

41.6/48.0

-/-

6

12

18

24

-/-

18.1/20

36.1/41.7

54.2/62.5

72.2/83.8

-/-

10.4/12.0

20.8/24.1

31.3/36.1

41.6/48

-/-

6

12

18

24

-/-

18.1/20.8

36.1/41.7

54.2/62.5

72.2/83.3

-/-

10.4/12.0

20.8/24.1

31.3/36.1

41.6/48.0

-/-

6

12

18

24

POWER SUPPLY

* Heater capacity (KW) based on heater voltage of 208v, 240v, and 480v. If power distribution voltage to unit varies from rated heater voltage, heater KW will vary accordingly.

11.4

11.4

17.5

25.1

32.6

43.6/43.6

43.6/43.6

52.9/59.8

75.4/85.9

98.0/111.9

29.2/29.2

29.2/29.2

33.8/37.8

46.8/52.9

59.7/67.7

15.4

15.4

19.0

26.6

34.1

20.5/20.5

20.5/20.5

31.2/35.2

44.2/50.2

57.1/65.1

10.2

10.2

17.5

25.1

32.6

35.0/35.0

35.0/35.0

50.3/57.2

72.8/83.3

95.4/109.3

22.6/22.6

22.6/22.6

31.2/35.2

44.2/50.2

57.1/65.1

MCA

16.4/16.4

25.1/28.5

47.6/54.6

20.5/20.5

25.2/28.7

47.8/54.7

72.2/82.6

16.0/16.0

16.0/17.7

28.7/32.7

41.7/47.7

26.1/26.1

27.1/30.5

49.6/56.6

72.2/82.6

19.2/19.2

19.2/19.5

47.8/54.7

43.6/49.6

9.6

9.9

17.4

24.9

28.0/28.0

28.0/31.2

50.3/57.2

72.8/83.3

95.4/109.3

15

15

20

30

35

60/60

60/60

60/60

-

-

35/35

35/35

35/40

50/60

-

45/45

45/45

60/60

-

-

30/30

30/30

35/40

45/60

-

25/25

25/25

35/40

45/60

-

15

15

20

30

35

Max Fuse or CRCT Breaker MOCP

20/20

25/30

50/60

-

-

-

25/25

25/30

50/60

-

20/20

20/20

30/35

45/50

-

-

-

80/90

-

-

-

-

15

15

20

25

35/35

35/35

60/60

-

-

35/35

35/35

50/60

-

25/25

25/25

35/35

45/50

-

-

-

80/90

-

-

-

-

-

-

-

-

-

-

-

90.0

100/110

-

-

-

-

-

-

-

-

90.0

100/125

-

-

-

-

60/70

-

-

-

90.0

100/110

-

-

-

-

60/70

-

-

-

-

-

-

-

-

-

60/70

20

20

20

30

35

-

-

-

-

-

13

LEGEND

FLA

LRA

— Full Load Amps

— Locked Rotor Amps

MCA — Minimum Circuit Amps

MOCP — Maximum Overcurrent Protection

RLA — Rated Load Amps

®

NOTES:

1. In compliance with NEC (National Electrical Code) requirements for multimotor and combination load equipment (refer to NEC

Articles 430 and 440), the overcurrent protective device for the unit shall be Power Supply fuse . The CGA (Canadian Gas

Association) 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 imbalance in supply voltage 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

C99024

Fig. 15—Electrical Data Legend

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, run leads up the high-voltage raceway to the line wiring splice box (See Fig. 12 through 14). For single-phase units, connect leads to the black and yellow wires; for 3-phase units, connect the leads to the black, yellow, and blue wires (See Fig.

17).

CONNECTING GROUND LEAD TO GROUND LUG — Refer to Fig. 17. Connect the ground lead to the chassis using the ground lug in the wiring splice box.

ROUTING CONTROL POWER WIRES — (24 V) — Form a drip-loop 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. 16.

The unit transformer supplies 24-v power for complete system including accessory electrical heater. An automatic-reset circuit breaker (See Fig. 18) is provided in the 24-v circuit; see the caution label on the transformer or Fig. 19. 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.

C

O

R

G

Y

E

W2

THERMOSTAT

AND SUBBASE

BRN

ORN

RED

GRN

YEL

WHT

UNIT CONTROL POWER

SPLICE BOX

Fig. 16—Control Connections

GROUND LUG

(IN SLPICE BOX)

GROUND

LEAD

SINGLE-PHASE

CONNECTIONS

TO DISCONNECT

PER NEC

L1

L2

BLK

YEL

3-PHASE

CONNECTIONS

L3 BLU

NOTE: Use copper wire only.

LEGEND

NEC – National Electrical Code

Field Wiring

Splice Connections

C99056

C99057

Fig. 17—Line Power Connections

24 V Circuit Breaker

24 Volt Compartment

Fig. 18—Control Wiring Plate

C99070

14

EXAMPLE: Supply voltage is 460-3-60.

AB = 452 v

BC = 464 v

AC = 455 v

Average Voltage =

=

452 + 464 + 455

3

1371

3

= 457

Determine maximum deviation from average voltage.

(AB) 457

(BC) 464

452 = 5 v

457 = 7 v

(AC) 457 455 = 2 v

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%.

IMPORTANT: If the supply voltage phase imbalance is more than 2%, contact your local electric utility company immediately.

TRANSFORMER CONTAINS A MANUAL

RESET OVERCURRENT PROTECTOR

IT WILL NOT AUTOMATICALLY RESET

DISCONNECT POWER PRIOR TO

SERVICING

THIS COMPARTMENT MUST BE CLOSED

EXCEPT WHEN SERVICING

C99058

Fig. 19—Transformer Label

SPECIAL PROCEDURES FOR 208-V OPERATION

1. Disconnect the yellow primary lead (w110) from the transformer. See unit wiring label (See Fig. 12 through 14).

2. Connect the yellow primary lead (w110) to the transformer terminal labeled 200v.

Indoor blower-motor speeds may need to be changed for 208-v operation. Refer to indoor airflow and airflow adjustments section.

PRE-START-UP c. Inspect all field and factory-wiring connections. Be sure that connections are completed and tight.

d. Inspect coil fins. If damaged during shipping and handling, carefully straighten fins with a fin comb.

4. Verify the following conditions: a. Make sure that outdoor-fan blade is correctly positioned in fan orifice.

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 hold-down bolts.

6. Each unit system has 2 Schrader-type ports, 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.

MOTOR FAN GRILLE

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 electrical sources are disconnected.

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 refrigerant 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.

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. Carefully unsweat remaining tubing stubs when necessary. 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 refrigerant leak is detected, see following Check for Refrigerant

Leaks section.

15

1/8" MAX BETWEEN

MOTOR AND FAN HUB MOTOR SHAFT

C99009

Fig. 20—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:

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

2. Repair leak following accepted practices.

NOTE: Install a bi-flow filter drier whenever the system has been opened for repair.

3. Check system for leaks using an approved method.

4. Evacuate refrigerant system and reclaim refrigerant if no additional leaks are found.

5. Charge unit with R-22 refrigerant, using a volumetriccharging 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 on this page 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 min. between ‘‘on’’ cycles to prevent compressor damage.

CHECKING COOLING AND HEATING CONTROL OPERA-

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

1. 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.

OUTDOOR COIL

Bypass

Position

INDOOR COIL

LCS

Metering

Position

LEGEND

LCS – Loss of Charge Switch

Accurater ® Metering Device

Arrow indicates direction of flow

C99027

1. Hot gas from compressor flows through the 4-way valve and is directed to the indoor coil. It is then condensed and subcooled through the coil circuits and then leaves the indoor coil by way of the ID Accurater in the bypass position to the liquid line.

2. The refrigerant then feeds the outdoor coil through the OD Accurater device in the metering position and distributes to each circuit.

3. Each circuit evaporates the refrigerant and the circuits are combined in the outdoor coil header.

4. The refrigerant then flows through the 4-way valve, accumulator, and back to the compressor.

Fig. 21—Typical Heat Pump Operation, Heating Mode

OUTDOOR COIL INDOOR COIL

Metering

Position

LCS

LEGEND

LCS – Loss of Charge Switch

Accurater ® Metering Device

Arrow indicates direction of flow

Bypass

Position

C99028

1. Hot gas from compressor flows through the 4-way valve and is directed to the outdoor coil. It is then condensed and subcooled through the coil circuits. Refrigerant leaves the outdoor coil by way of the OD Accurater in the bypass position to the liquid line.

2. The refrigerant then feeds the indoor coil through the ID Accurater device in the metering position and distributes to each circuit.

3. Each circuit evaporates the refrigerant and the circuits are combined in the indoor coil header.

4. The refrigerant then flows through the 4-way valve, accumulator, and back to the compressor.

Fig. 22—Typical Heat Pump Operation, Cooling Mode

16

Table 4A—Wet Coil Air Delivery

Unit 50JS 018-060 (Deduct 10% for 208v)*

UNIT

018

024

30

36

42

48

60

MOTOR SPEED

Low

Med

High

Low

Med

High

Low

Med

High

Low

Med

High

Low

Med

High

Low

Med

High

Low

Med

High

Cfm

Watts

Cfm

Watts

Cfm

Watts

Cfm

Watts

Cfm

Watts

Cfm

Watts

Cfm

Watts

Cfm

Watts

Cfm

Watts

Cfm

Watts

Cfm

Watts

Cfm

Watts

Cfm

Watts

Cfm

Watts

Cfm

Watts

Cfm

Watts

Cfm

Watts

Cfm

Watts

Cfm

Watts

Cfm

Watts

Cfm

Watts

0.0

-

-

-

-

-

-

-

-

-

-

-

-

295

928

388

1203

-

-

592

1499

-

-

-

-

606

1464

680

1608

768

1656

741

1994

-

-

-

-

742

2197

838

2485

-

-

0.1

-

-

-

-

-

-

-

-

-

-

-

-

292

882

383

1120

-

-

581

1421

-

-

-

-

596

1399

665

1535

755

1576

724

1937

-

-

-

-

723

2141

822

2406

934

2483

0.2

-

-

237

971

-

-

-

-

-

-

-

-

289

802

377

1062

-

-

567

1351

-

-

-

-

586

1341

649

1461

742

1508

709

1869

-

-

-

-

698

2103

803

2269

913

2391

1475

-

-

575

1282

635

1387

730

1447

690

1797

773

1957

-

-

666

2057

780

2127

891

2283

EXTERNAL STATIC PRESSURE (IN. WG)

0.3

0.4

0.5

0.6

0.7

-

-

214

821

214

821

-

-

-

-

-

-

-

-

372

1004

-

-

552

1281

660

191

696

-

-

283

848

191

696

368

957

-

-

-

-

366

930

469

1141

538

1207

636

170

575

-

-

274

707

-

-

366

872

-

-

-

-

361

838

458

1027

525

1125

617

267

555

-

-

-

-

-

-

365

785

-

-

-

-

-

-

449

924

512

1034

603

-

442

828

499

891

-

-

-

936

592

1371

-

-

563

1218

622

1316

718

1390

664

1722

744

1867

-

-

629

1988

752

2012

866

2170

1274

776

1452

550

1146

611

1247

707

1331

631

1645

715

1787

799

1914

591

1894

721

1937

837

2061

1186

761

1356

537

1066

600

1180

696

1268

594

1566

687

1719

782

1842

559

1783

689

1894

806

1960

1105

744

1254

-

-

590

1111

684

1198

562

1480

662

1653

773

1774

540

1674

661

1855

776

1868

-

-

-

-

-

-

-

-

360

688

425

* 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 portions of table that are beyond the blower motor capacity or are not recommended.

3. Deduct 10% for 208v.

1024

725

1145

-

-

-

-

671

1119

543

1384

640

1575

756

1686

-

-

639

1770

750

1780

0.8

-

-

-

-

-

-

-

-

-

-

414

-

-

-

-

735

-

-

-

-

581

-

-

-

-

928

706

1030

-

-

552

1269

625

1463

704

1538

-

-

632

1571

735

1687

0.9

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

566

-

-

-

-

-

689

910

-

-

-

-

-

-

-

-

-

-

-

-

-

-

1.0

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

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.

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. Observe 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).

17

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 min., 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.

NOTE: Adjustment of the refrigerant charge is not required unless the unit is suspected of not having the proper R-22 charge.

Table 4B—Wet Coil Air Delivery

Unit 50JX 024-060 (Deduct 10% for 208v)*

UNIT

024

30

36

MOTOR SPEED

Low

Med

High

Low

Med

High

Low

Med

High

Low

Watts

Cfm

Watts

Cfm

Watts

Cfm

Watts

Cfm

Watts

Cfm

Watts

Cfm

Watts

Cfm

Watts

Cfm

Watts

Cfm

Watts

Cfm

Watts

0.0

-

-

276

963

275

923

-

-

375

1202

-

-

462

1374

523

1500

-

-

620

1662

-

0.1

-

-

276

929

273

844

-

-

377

1170

-

-

451

1290

506

1408

645

1474

600

1621

-

0.2

-

-

272

781

271

754

-

-

371

1079

-

-

431

1205

490

1301

628

1369

586

1581

-

0.3

EXTERNAL STATIC PRESSURE (IN. WG)

0.4

0.5

0.6

0.7

-

-

-

-

270

669

359

941

362

976

-

-

411

1116

471

1190

610

1267

574

1540

-

-

-

353

876

-

-

-

-

354

884

469

1174

394

1020

449

1082

595

1169

562

1496

686

350

814

-

-

-

-

-

-

350

807

449

988

381

916

426

977

584

1069

548

1447

661

447

968

-

-

-

-

347

737

-

-

435

828

-

-

-

-

575

962

530

1392

634

-

-

-

510

718

-

-

-

1331

606

439

869

-

-

-

-

341

622

-

-

428

0.8

431

765

-

-

-

-

-

-

-

-

-

-

-

-

487

-

-

-

-

1263

577

42

48

Med

High

Low

Med

High

Low

Cfm

Watts

Cfm

Watts

Cfm

Watts

Cfm

Watts

Cfm

Watts

Cfm

-

-

-

620

1662

763

1917

-

-

597

2265

-

-

-

600

1621

747

1868

-

-

592

2190

-

-

-

586

1581

729

1822

-

-

578

2101

-

-

-

574

1540

709

1774

852

1982

526

2033

1722

-

-

562

1496

686

1722

832

1914

460

1974

1662

-

-

548

1447

661

1662

809

1839

452

1869

1594

-

-

530

1392

634

1594

784

1757

445

1614

1515

757

1669

-

1331

606

1515

757

1669

-

-

1427

730

1577

487

1263

577

1427

730

1577

-

-

1330

704

1486

-

-

547

1330

704

1486

-

-

60 Med

High

Watts

Cfm

Watts

Cfm

754

2383

901

2480

730

2282

876

2383

707

2202

856

2301

687

2134

836

2233

671

2070

813

2175

658

2005

785

2122

646

1935

755

2066

630

1858

723

1998

603

1771

696

1910

558

1667

681

1788

486

1576

687

1619

* 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 portions of table that are beyond the blower motor capacity or are not recommended.

3. Deduct 10% for 208v.

1227

682

1402

-

-

517

1227

682

1402

-

-

0.9

423

659

-

-

-

-

-

-

-

-

-

-

-

-

462

-

-

-

-

1186

547

1.0

-

-

-

-

-

-

-

-

-

-

-

-

-

-

439

-

-

-

-

1103

517

The charging label and the tables shown refer to system temperatures and pressures in cooling mode only. A refrigerant 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 indicated 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 insufficient airflow across either coil or both coils.

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.

NO CHARGE — Check for leak. Use standard evacuating techniques. After evacuating system, weigh in the specified amount of refrigerant (refer to system data plate).

LOW CHARGE COOLING — Use Cooling Charging Charts

(Figs. 23-35). 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 gage and temperature sensing devices are required. Connect the pressure gage 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 effect 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 gage. 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.

18

(018) 60HZ CHARGING CHART

689 100

620 90

551 80

483 70

414 60

345 50

276 40

207 30

20.0

30.0

40.0

50.0

60.0

SUCTION LINE TEMPERATURE (

°

F)

70.0

80.0

-7 -1 4 10 16


°

C)

21 27

50JS500087

C00026

Fig. 23—Cooling Charging Chart, 50JS 018 Units

689 100

620 90

551 80

483 70


OUTDOOR TEMP

°

F

°

C

125 52

115 46

105 41

95 35

85 29

75 24

65 18

55 13

45 7

414 60

345 50

276 40

207 30

20.0

-7

30.0

40.0

50.0

60.0


°

F)

-1 4 10 16

SUCTION LINE TEMPERATURE ( ° C)

70.0

21

80.0

27

50JS500089

C00028

Fig. 25—Cooling Charging Chart, 50JS030 Units

INDOOR AIRFLOW AND AIRFLOW ADJUSTMENTS

OUTDOOR TEMP

°

F

°

C

125 52

115 46

105 41

95 35

85 29

75 24

65 18

55 13

45 7

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 2A and 2B.

Tables 4A and 4B 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.

758 110

689 100

620 90

551 80

483 70

414 60

345 50


OUTDOOR TEMP

°

F

°

C

125 52

115 46

105 41

95 35

85 29

75 24

65 18

55 13

45 7

276 40

20.0

30.0

40.0

50.0

60.0


°

F)

70.0

80.0

-7 -1 4 10 16


°

C)

21 27

50JS500088

C00027


689 100

620 90

551 80

483 70


OUTDOOR TEMP

°

F

°

C

125 52

115 46

105 41

95 35

85 29

75 24

65 18

55 13

414 60

45 7

345 50

276 40

207 30

20.0

30.0

40.0

50.0

60.0


°

F)

70.0

80.0

-7 -1 4 10 16


°

C)

21 27

50JS500090

C00029


Airflow can be changed by changing the lead connection of the blower motor.

Unit 50JS and JX three-speed motors (except sizes JS 018 and JX

030) are factory wired for low speed operation. Unit 50JX 030 is factory wired for medium speed. Unit 50JS 018 has a two-speed motor wired for low speed.

For 208/230-v Motors:—The motor leads are color-coded as follows:

3-SPEED

Black = high speed

Blue = medium speed

Red = low speed

19

689 100

620 90

551 80

483 70

414 60


OUTDOOR TEMP

°

F

°

C

125 52

115 46

105 41

95 35

85 29

75 24

65 18

55 13

45 7

689 100

620 90

551 80

483 70

414 60


345 50 345 50

276 40 276 40

207 30

20.0

-7

30.0

40.0

50.0

60.0


°

F)

-1 4 10 16


°

C)

70.0

21

80.0

27

50JS500091

C00030



OUTDOOR TEMP

°

F

°

C

689 100

620 90

551 80

483 70

414 60

345 50

276 40

125 52

115 46

105 41

95 35

85 29

75 24

65 18

55 13

45 7

207 30

20.0

30.0

40.0

50.0

60.0


°

F)

70.0

80.0

-7 -1 4 10 16


°

C)

21 27

50JS500093

C00032


To change the speed of the blower motor (BM), remove the fan motor speed leg lead from the blower relay (BR). This wire is attached to IGC terminal BM for single-phase and 3-phase units.

To change the speed, remove and replace with lead for desired blower motor speed. Insulate the removed lead to avoid contact with chassis parts.

For 460-v GE Motors—The motor leads are color coded as follows:

3-SPEED

Black = high

Violet = jumper

Orange = medium

Red = low

20

207 30

20.0

-7

30.0

40.0

50.0

60.0

SUCTION LINE TEMPERATURE ( ° F)

-1 4 10 16


°

C)

70.0

21

80.0

27

50JS500092

C00031


To change the speed of the blower motor (BM), remove fan motor speed lead from the blower relay (BR) and replace with the lead for the desired blower motor speed. The motor speed lead is attached to terminal BM. 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 the 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 this equipment. This heat pump unit should be inspected at least once each year by a qualified service person.

To troubleshoot unit, refer to Table 5.

NOTE TO EQUIPMENT OWNER: Consult your local dealer about the availability of a maintenance contract.

The ability to properly perform maintenance on this equipment 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.

OUTDOOR TEMP

°

F

°

C

125 52

115 46

105 41

95 35

85 29

75 24

65 18

55 13

45 7

689 100.0

620 90.0

483

414

345

276

551 80.0

70.0

60.0

50.0

40.0

(024) 60 Hz CHARGING CHART OUTDOOR

TEMP

F C

125 52

115 46

105 41

95 35

85 29

75 24

65 18

55 13

45 7

207 30.0

20.0

-7

30.0

-1

40.0

50.0

60.0

SUCTION LINE TEMPERATURE (DEG. F)

4 10 16

SUCTION LINE TEMPERATURE (DEG. C)

70.0

21

80.0

27

50JX500219

C99031

Fig. 30—Cooling Charging Chart, 50JX 024 Units

689 100.0

620 90.0

551

483

80.0

70.0

414

345

60.0

50.0

276 40.0


TEMP

F C

125 52

115 46

105 41

95 35

85 29

75 24

65 18

55 13

45 7

207 30.0

20.0

-7

30.0

-1

40.0

50.0

60.0


4 10 16


70.0

21

80.0

27

50JX500221

C99033

Fig. 32—Cooling Charging Chart, 50JX036 Units

689 100.0

620 90.0


TEMP

F C

125 52

115 46

105 41

95 35

85 29

75 24

65 18

55 13

45 7

483

414

345

276

551 80.0

70.0

60.0

50.0

40.0

207 30.0

20.0

-7

30.0

-1

40.0

50.0

60.0


4 10 16


70.0

21

80.0

27

50JX500223

C99035


689 100.0

620 90.0

483

414

345

276

551 80.0

70.0

60.0

50.0

40.0


TEMP

F C

125 52

115 46

105 41

95 35

85 29

75 24

65 18

55 13

45 7

207 30.0

20.0

-7

30.0

-1

40.0

50.0

60.0


4 10 16


70.0

21

80.0

27

50JX500220

C99032


689 100.0

620 90.0

551

483

80.0

70.0

414

345

60.0

50.0

276 40.0


TEMP

F C

125 52

115 46

105 41

95 35

85 29

75 24

65 18

55 13

45 7

207 30.0

20.0

-7

30.0

-1

40.0

50.0

60.0


4 10 16


70.0

21

80.0

27

50JX500222

C99034



TEMP

F C

689 100.0

620 90.0

483

414

345

276

551 80.0

70.0

60.0

50.0

40.0

125 52

115 46

105 41

95 35

85 29

75 24

65 18

55 13

45 7

207 30.0

20.0

-7

30.0

-1

40.0

50.0

60.0


4 10 16


70.0

21

80.0

27

50JX500224

C99036

Fig. 35—Cooling Charging Chart,50JX 060 Units

21

Failure to follow these warnings could result in serious injury or death:

1. Turn off electrical power to the unit 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.

results, 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 all 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.

OUTDOOR FAN

Errors made when reconnecting wires may cause improper and dangerous operation. Label all wires prior to disconnection when servicing.

The minimum maintenance requirements for this equipment are as follows:

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 necessary.

AIR FILTER

IMPORTANT: Never operate the unit without a suitable air filter in the return-air duct system. Always replace the filter with the same dimensional size and type as originally installed (See Tables

1A and 1B for recommended filter sizes).

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

(throwaway-type) or clean (cleanable-type) at least twice during each cooling season or whenever the filters become clogged with dust and lint.

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.

Keep the condenser fan free from all obstructions to ensure proper cooling operation. Never place articles on top of the unit. Damage to unit may result.

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 the hub is 1/8 in. away from the motor end (1/8 in. of motor shaft will be visible) (See Fig. 20).

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

6. Replace grille.

ELECTRICAL CONTROLS AND WIRING — Inspect and check the electrical controls and wiring annually. Be sure to turn off the electrical power to the unit.

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 least 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 instrumentation. 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.

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

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 personal injury or death.

OUTDOOR COIL, INDOOR COIL, AND CONDENSATE

DRAIN PAN — Inspect the condenser coil, evaporator coil, and condensate drain pan at least once each year.

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

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

22

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

INDOOR AIRFLOW — The indoor airflow does not require checking unless improper performance is suspected. If a problem

within a range of 15v to 30v 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.

LOSS OF CHARGE SWITCH — The loss of charge switch is a protective device wired into control circuit (low voltage). It shuts off the compressor if abnormally low pressures are present in the refrigeration circuit.

NOTE: Because these switches are attached to refrigeration system under pressure, it is not advisable to remove this device for troubleshooting unless you are reasonably certain that a problem exists. If switch must be removed, remove and recover all system charge so that pressure gages read 0 psi. Never open system without breaking vacuum with dry nitrogen.

CHECK DEFROST THERMOSTAT — There is a liquid header with a brass distributor and feeder tube going into outdoor coil. At the end of 1 of the feeder tubes, there is a 3/8-in. OD stub tube approximately 3 in. long. (See Fig. 37.) The defrost thermostat should be located on stub tube. Note that there is only 1 stub tube used with liquid header, and on most units it is the bottom circuit.

DEFROST THERMOSTATS — Defrost thermostat signals heat

FEEDER TUBE

STUB TUBE

C99097

Fig. 36—Refrigerant Circuit

exists, be sure that all supply- and return-air grilles are open and

free from obstructions, and that the air filter is clean. When necessary, refer to Indoor Airflow and Airflow Adjustments section to check the system airflow.

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

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.

SYSTEM INFORMATION

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

DEFROST

THERMOSTAT

C99029

Fig. 37—Defrost Thermostat

pump that conditions are right for defrost or that conditions have changed to terminate defrost. It is 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.

23

SYMPTOM

Table 5—Cooling and Heating Troubleshooting Chart

Compressor and outdoor fan will not start

CAUSE

Power failure

Fuse blown or circuit breaker tripped

Defective thermostat, contactor, transformer, control relay or defrost board

Insufficient line voltage

Incorrect or faulty wiring

Thermostat setting too high

Units have a 5-min. time delay

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—wait for 5 min. until time-delay relay is deenergized

Compressor will not start but condenser fan runs

Three-phase scroll compressor (size 030-

060units) makes excessive noise, and there may be a low pressure differential

Compressor cycles (other than normally satisfying thermostat)

Compressor operates continuously

Excessive head pressure

Head pressure too low

Excessive suction pressure

Faulty wiring or loose connections in compressor circuit

Compressor motor burned out, seized, or internal overload open

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

One leg of 3-phase power dead

Low input voltage (20% low)

Scroll compressor is rotating in the wrong direction

Refrigerant overcharge or undercharge

Defective compressor

Insufficient line voltage

Blocked outdoor coil

Defective run/start capacitor, overload or start relay

Defective thermostat

Faulty outdoor-fan motor or capacitor

Damaged reversing valve

Restriction in refrigerant 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 dirty or restricted

Dirty air filter

Dirty indoor or outdoor coil

Refrigerant overcharged

Air in system

(Heat) Indoor air restricted or recirculating

Indoor or outdoor air restricted or air short-cycling


Compressor valves leaking

Restriction in liquid tube

(Heat) Outdoor coil frosted

(Cool) High Heat load

Compressor valves leaking

Reversing valve hung up or leaking internally

Refrigerant overcharged

Check wiring and repair or replace

Determine cause

Replace compressor

Determine cause and replace

Replace fuse or reset circuit breaker

Determine cause


Correct the direction of rotation by reversing the

3-phase power leads to the unit

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

Replace and determine cause



Determine cause and replace

Replace thermostat

Replace


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 restriction

Replace filter

Clean coil

Recover excess refrigerant

Recover refrigerant, evacuate system, and recharge



Check for leaks, repair and recharge

Replace compressor

Remove restriction

Move timer on control board to 30 min. between defrost cycles

Check for source and eliminate

Replace compressor

Replace valve

Recover excess refrigerant

24

SYMPTOM

Suction pressure too low

Compressor runs but outdoor fan does not

IFM does not run

IFM runs when it should be off

IFM operation is intermittent

Cooling and Heating Troubleshooting Chart (cont’d)

(Cool) Dirty air filter

CAUSE

(Heat) Outdoor coil frosted


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 board open

Blower wheel not secured to shaft

Insufficient voltage at motor

Power connectors not properly sealed

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 dripping into motor

Connectors not firmly sealed

REMEDY

Replace filter

Move timer on control board to 30 min. between defrost cycles

Check for leaks, repair and recharge

Remove source of restriction

Increase air quantity

Check filter—replace if necessary

Reset thermostat

Install low-ambient kit

Replace

Check condition of relay on board

Replace if necessary

Properly tighten blower wheel to shaft


Connectors should snap easily; do not force

Allow a few min. for motor to shut off

If 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

IFM—Indoor Fan Motor

START-UP CHECKLIST

(REMOVE AND STORE IN JOB FILE)

I. PRELIMINARY INFORMATION

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

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

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

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

II. PRE-START-UP

___ Verify that all 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 and propeller for location in housing and setscrew tightness

III. 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: __________ DB __________ WB

Heat Pump Supply Air: __________

Electric Heater Supply Air: __________

PRESSURES

Refrigerant Suction __________ psig

Refrigerant Discharge __________ psig

___ Verify refrigerant charge using charging tables

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

25

26

27

Copyright 2000 CARRIER Corp. • 7310 W. Morris St. • Indianapolis, IN 46231 50js1si

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

Book 1 4

Tab 5a 5a PC 101 Catalog No. 565-057 Printed in U.S.A.

Form 50JS,JX-1SI Pg 28 5-00 Replaces: 50JX-2SI

User manual | Carrier 50JS JX018-060 heat pump unit Installation, Start-Up and Service Instructions

50JS,JX018-060

Single-Package Heat Pump Units

Installation, Start-Up and Service Instructions

Fig. 1—Model 50JS/JX

Fig. 2—50JS018-042/50JX024-036 Unit Dimensions

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

Fig. 4—Roof Curb Dimensions

Fig. 5—Unit Leveling Tolerances

Fig. 6—Slab Mounting Detail

Fig. 7—Threading Belt

Fig. 8—Suggested Rigging

Table 1A—Physical Data

Table 1B—Physical Data

Table 2A—Minimum Airflow for Reliable Electric Heater Operation (Cfm)

Table 2B—Minimum Airflow for Reliable Electric Heater Operation (Cfm)

Fig. 9—Typical Installation

Fig. 11—Condensate Trap

Fig. 10—50JX with Duct Covers On

(Unit shown with optional louvered grille)

LEGEND

Fig. 12—Wiring Schematics

Fig. 13—Wiring Schematics

LEGEND

Fig. 14—Wiring Schematics

Table 3A—Electrical Data—50JS

→

Table 3B—Electrical Data—50JX

Fig. 15—Electrical Data Legend

Fig. 16—Control Connections

Fig. 17—Line Power Connections

24 V Circuit Breaker

24 Volt Compartment

Fig. 18—Control Wiring Plate

Fig. 19—Transformer Label

Fig. 20—Fan Blade Clearance

Fig. 21—Typical Heat Pump Operation, Heating Mode

Fig. 22—Typical Heat Pump Operation, Cooling Mode

Table 4A—Wet Coil Air Delivery

Unit 50JS 018-060 (Deduct 10% for 208v)*

Table 4B—Wet Coil Air Delivery

Unit 50JX 024-060 (Deduct 10% for 208v)*

Fig. 23—Cooling Charging Chart, 50JS 018 Units

Fig. 25—Cooling Charging Chart, 50JS030 Units

Fig. 24—Cooling Charging Chart, 50JS 024 Units

Fig. 26—Cooling Charging Chart, 50JS 036 Units

Fig. 27—Cooling Charging Chart, 50JS 042 Units

Fig. 29—Cooling Charging Chart, 50JS 060 Units

Fig. 28—Cooling Charging Chart, 50JS 048 Units

Fig. 30—Cooling Charging Chart, 50JX 024 Units

Fig. 32—Cooling Charging Chart, 50JX036 Units

Fig. 34—Cooling Charging Chart, 50JX 048 Units

Fig. 31—Cooling Charging Chart, 50JX 030 Units

Fig. 33—Cooling Charging Chart, 50JX 042 Units

Fig. 35—Cooling Charging Chart,50JX 060 Units

Fig. 36—Refrigerant Circuit

Fig. 37—Defrost Thermostat

Table 5—Cooling and Heating Troubleshooting Chart

Cooling and Heating Troubleshooting Chart (cont’d)

Key Features

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