Carrier 50SX024-060, 50SS018, 50SS024, 50SS030, 50SS036 Installation, Start-up And Service Instructions Manual

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Page 1

Installation, Start-Up and

Service Instructions

CONTENTS

Page

SAFETY CONSIDERATIONS .................1-12

General ......................................1

RECEIVING AND INSTALLATION ...........13-26

Step 1 — Check Equipment ..................13

• IDENTIFY UNIT

• INSPECT SHIPMENT

Step 2 — Provide Unit Support ..............13

• ROOF CURB

• SLAB MOUNT

Step 3 — Provide Clearances ................13

Step 4 — Rig and Place Unit .................13

• UNITS WITHOUT BASE RAILS

• UNITS WITH OPTIONAL BASE RAILS

Step 5 — Select and Install Ductwork ........16

• CONVERTING HORIZONTAL DISCHARGE UNITS TO DOWNFLOW (VERTICAL) DISCHARGE — STD (NON-ICM) UNITS

• CONVERTING HORIZONTAL DISCHARGE UNITS TO DOWNFLOW (VERTICAL) DISCHARGE — ICM UNITS

• ACCESSORY DUCT FLANGE KIT INSTALLATION

Step 6 — Provide for Condensate Disposal ...20

Step 7 — Install Electrical Connections ......21

• HIGH-VOLTAGE CONNECTIONS

• ROUTING POWER LEADS INTO UNIT

• CONNECTING GROUND LEAD TO WIRE-BINDING SCREW

• ROUTING CONTROL POWER WIRES — STD NON-ICM UNITS (24 V)

• ROUTING CONTROL POWER WIRES — ICM UNITS (24 V)

• SPECIAL PROCEDURES FOR 208-V OPERATION

PRE-START-UP ............................26,27

START-UP ................................27-39

Check for Refrigerant Leaks .................27

Start-Up Cooling Section and

Make Adjustments ........................27

MAINTENANCE ............................40,41

Air Filter ....................................40

Unit Top Removal ...........................40

Evaporator Blower and Motor ................40

Condenser Coil, Evaporator Coil,

and Condensate Drain Pan ................41

Condenser Fan .............................41

Electrical Controls and Wiring ...............41

Refrigerant Circuit ..........................41

Evaporator Airﬂow ..........................41

Metering Devices ...........................41

Liquid Line Strainer .........................41

TROUBLESHOOTING COOLING CHART .....42,43

START-UP CHECKLIST .....................CL-1

NOTE TO INSTALLER — Before the installation, READ THESE INSTRUCTIONS CAREFULLY AND COMPLETELY. 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 personnelcan perform basicmaintenance 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. Wearsafety glasses and work gloves. Use quenching cloth for unbrazing operations. Have ﬁre extinguisher available for all brazing operations.

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

General— 50SS,SX cooling units are fully self-contained

and designed for outdoor installation. See Fig. 1. As shown in Fig. 2-9, both small- and large-cabinet units are shipped in a horizontal-discharge conﬁguration for installation on a ground-level slab. All units can be converted to downﬂow discharge conﬁgurations for rooftop applications. See Fig. 10 for roof curb dimensions.

Instructions continued on page 13.

Fig. 1 — Unit 50SX With Optional Base Rail Shown

50SS018-060 50SX024-060

Single-Package Cooling Units

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

Book 1 4 Tab 1b 6b

PC 111 Catalog No. 535-022 Printed in U.S.A. Form 50SS,SX-4SI Pg 1 5-95 Replaces: 50SS,SX-3SI

Page 2

REQUIREDCLEARANCES TOCOMBUSTIBLE MATERIAL — in.(mm)

Unit Top ................................14(356)

Duct Side of Unit ............................2(51)

Side Opposite Ducts ........................14(356)

Bottom of Unit .................................0

Vertical Discharge First 12 in. (305) of Supply Duct .......1(25)

NECESSARY REQUIRED CLEARANCES — in. (mm)

Between Units, Control Box Side ................42(1067)

Unit and Ungrounded Surfaces, Control Box Side ......36(914)

Unit and Block or Concrete Walls and Other Grounded

Surfaces, Control Box Side ...................42(1067)

REQUIRED CLEARANCES FOR SERVICING — in. (mm)

Evaporator Coil Access Side ...................30(762)

Control Box Access Side ......................30(762)

(Except for Necessary Requirements)

Unit Top ................................36(914)

Side Opposite Ducts ........................30(762)

UNIT 50SS

CENTER OF GRAVITY (in./mm)

XYZ

018 19.6/499 21.7/551 10.6/269 024 22.5/570 20.9/530 10.0/254 030 22.1/561 20.3/516 10.0/253 036 21.2/538 19.9/506 9.9/251 042 21.3/540 19.9/506 11.3/286

LEGEND

CG — Center of Gravity NEC — National Electrical Code COND — Condenser REQ’D — Required MAT’L — Material

NOTES:

1. Clearances must be maintained to prevent recirculation of air from

outdoor-fan discharge.

2. Dimensions in ( ) are in millimeters.

UNIT 50SS

ELECTRICAL

CHARACTERISTICS

UNIT WT CORNER WT (Lb/Kg)

UNIT HEIGHT

(in./mm)

DIMENSION

(in./mm)

Lb Kg A B C D E F

018 208/230-1-60 208 95 61/28 43/20 69/31 35/16 24.1/613 18.2/462 024 208/230-1-60 237 108 60/27 54/25 92/42 31/14 24.1/613 18.2/462 030 208/230-1-60, 208/230-3-60 254 115 61/28 58/26 96/44 39/18 24.1/613 18.2/462 036 208/230-1-60, 208/230-3-60, 460-3-60 270 123 75/35 48/22 109/50 37/17 24.1/613 18.2/462 042 208/230-1-60, 208/230-3-60, 460-3-60 300 135 81/40 57/26 117/53 45/20 28.1/714 22.2/563

Fig. 2 — Dimensions; Units 50SS018-042 Without Base Rail

Page 3

REQUIREDCLEARANCES TOCOMBUSTIBLE MATERIAL — in.(mm)

Unit Top ................................14(356)

Duct Side of Unit ............................2(51)

Side Opposite Ducts ........................14(356)

Bottom of Unit .................................0

Vertical Discharge First 12 in. (305) of Supply Duct .......1(25)

NECESSARY REQUIRED CLEARANCES — in. (mm)

Between Units, Control Box Side ................42(1067)

Unit and Ungrounded Surfaces, Control Box Side ......36(914)

Unit and Block or Concrete Walls and Other Grounded

Surfaces, Control Box Side ...................42(1067)

REQUIRED CLEARANCES FOR SERVICING — in. (mm)

Evaporator Coil Access Side ...................30(762)

Control Box Access Side ......................30(762)

(Except for Necessary Requirements)

Unit Top ................................36(914)

Side Opposite Ducts ........................30(762)

UNIT 50SS

CENTER OF GRAVITY (in./mm)

XYZ

018 19.5/495 21.7/551 12.9/328 024 22.1/562 20.9/532 12.3/313 030 21.8/554 20.4/519 12.3/312 036 21.0/533 20.1/509 12.2/310 042 21.0/532 20.1/510 13.6/344

LEGEND

CG — Center of Gravity NEC — National Electrical Code COND — Condenser REQ’D — Required MAT’L — Material

NOTES:

1. Clearances must be maintained to prevent recirculation of air from

outdoor-fan discharge.

2. Dimensions in ( ) are in millimeters.

UNIT 50SS

ELECTRICAL

CHARACTERISTICS

UNIT WT CORNER WT (Lb/Kg)

UNIT HEIGHT

(in./mm)

DIMENSION

(in./mm)

Lb Kg A B C D E F

018 208/230-1-60 228 104 66/30 48/22 74/34 40/18 27.4/697 21.5/546 024 208/230-1-60 257 117 65/30 59/27 97/44 36/16 27.4/697 21.5/546 030 208/230-1-60, 208/230-3-60 274 125 66/30 63/29 101/46 44/20 27.4/697 21.5/546 036 208/230-1-60, 208/230-3-60, 460-3-60 290 132 81/37 53/24 114/52 42/19 27.4/697 21.5/546 042 208/230-1-60, 208/230-3-60, 460-3-60 320 146 86/39 62/28 122/55 50/23 31.4/798 25.5/648

Fig. 3 — Dimensions; Units 50SS018-042 with Optional Base Rail

Page 4

REQUIRED CLEARANCES TO COMBUSTIBLE MATERIAL — in. (mm)

Unit Top ....................................14(356)

Duct Side of Unit .................................2(51)

Side Opposite Ducts .............................14(356)

Bottom of Unit .....................................0

Vertical Discharge First 12 in. (305) of Supply Duct ...............1(25)

NECESSARY REQUIRED CLEARANCES — in. (mm)

Between Units, Control Box Side ......................42(1067)

Unit and Ungrounded Surfaces, Control Box Side ..............36(914)

Unit and Block or Concrete Walls and Other Grounded

Surfaces, Control Box Side .........................42(1067)

REQUIRED CLEARANCES FOR SERVICING — in. (mm)

Evaporator Coil Access Side .........................30(762)

Control Box Access Side ...........................30(762)

(Except for Necessary Requirements)

Unit Top ....................................36(914)

Side Opposite Ducts .............................30(762)

UNIT 50SS

CENTER OF GRAVITY (in./mm)

XYZ

048 21.9/555 19.6/498 13.4/341 060 22.2/565 19.8/503 13.4/340

LEGEND

CG — Center of Gravity NEC — National Electrical Code COND — Condenser REQ’D — Required MAT’L — Material

NOTES:

1. Clearances must be maintained to prevent recirculation of air from outdoor-fan discharge.

2. Dimensions in ( ) are in millimeters.

UNIT 50SS

ELECTRICAL

CHARACTERISTICS

UNIT WT CORNER WT (Lb/Kg)

Lb Kg A B C D

048 208/230-1-60, 208/230-3-60, 460-3-60 332 151 82/37 68/31 131/60 51/23 060 208/230-1-60, 208/230-3-60, 460-3-60 359 163 65/30 99/45 120/55 75/34

Fig. 4 — Dimensions; Units 50SS048,060 Without Base Rail

Page 5

REQUIRED CLEARANCES TO COMBUSTIBLE MATERIAL — in. (mm)

Unit Top ..................................14(356)

Duct Side of Unit ..............................2(51)

Side Opposite Ducts ...........................14(356)

Bottom of Unit ..................................0

Vertical Discharge First 12 in. (305) of Supply Duct ............1(25)

NECESSARY REQUIRED CLEARANCES — in. (mm)

Between Units, Control Box Side ....................42(1067)

Unit and Ungrounded Surfaces, Control Box Side ............36(914)

Unit and Block or Concrete Walls and Other Grounded

Surfaces, Control Box Side ......................42(1067)

REQUIRED CLEARANCES FOR SERVICING — in. (mm)

Evaporator Coil Access Side .......................30(762)

Control Box Access Side .........................30(762)

(Except for Necessary Requirements)

Unit Top ..................................36(914)

Side Opposite Ducts ...........................30(762)

UNIT 50SS

CENTER OF GRAVITY (in./mm)

XYZ

048 21.7/550 19.7/501 15.7/400 060 22.0/560 19.9/506 15.7/399

LEGEND

CG — Center of Gravity NEC — National Electrical Code COND — Condenser REQ’D — Required MAT’L — Material

NOTES:

1. Clearances must be maintained to prevent recirculation of air from outdoor-fan discharge.

2. Dimensions in ( ) are in millimeters.

UNIT 50SS

ELECTRICAL

CHARACTERISTICS

UNIT WT CORNER WT (Lb/Kg)

Lb Kg A B C D

048 208/230-1-60, 208/230-3-60, 460-3-60 352 160 87/40 73/33 136/62 56/25 060 208/230-1-60, 208/230-3-60, 460-3-60 379 172 70/32 104/47 125/57 80/36

Fig. 5 — Dimensions; Units 50SS048,060 With Optional Base Rail

Page 6

REQUIREDCLEARANCES TOCOMBUSTIBLE MATERIAL— in. (mm)

Unit Top ................................14(356)

Duct Side of Unit ............................2(51)

Side Opposite Ducts ........................14(356)

Bottom of Unit .................................0

Vertical Discharge First 12 in. (305) of Supply Duct .......1(25)

NECESSARY REQUIRED CLEARANCES — in. (mm)

Between Units, Control Box Side ................42(1067)

Unit and Ungrounded Surfaces, Control Box Side ......36(914)

Unit and Block or Concrete Walls and Other Grounded

Surfaces, Control Box Side ...................42(1067)

REQUIRED CLEARANCES FOR SERVICING — in. (mm)

Evaporator Coil Access Side ...................30(762)

Control Box Access Side ......................30(762)

(Except for Necessary Requirements)

Unit Top ................................36(914)

Side Opposite Ducts ........................30(762)

NOTES:

1. Clearances must be maintained to prevent recirculation of air from

outdoor-fan discharge.

2. Dimensions in ( ) are in millimeters.

UNIT 50SX

CENTER OF GRAVITY (in./mm)

XYZ

024 21.7/552 20.7/527 12.7/321 030 21.9/556 20.7/525 12.7/321 036 20.8/528 20.0/507 12.7/321

LEGEND

CG — Center of Gravity NEC — National Electrical Code COND — Condenser REQ’D — Required MAT’L — Material

UNIT 50SX

ELECTRICAL

CHARACTERISTICS

UNIT WT CORNER WT (Lb/Kg)

Lb Kg A B C D

024 208/230-1-60 270 123 67/30 62/28 99/45 42/19 030 208/230-1-60 273 124 66/30 64/29 100/45 43/20 036 208/230-1-60, 208/230-3-60, 460-3-60 291 132 80/36 54/25 112/51 45/20

Fig. 6 — Dimensions; Units 50SX024-036 Without Base Rail

Page 7

REQUIREDCLEARANCES TOCOMBUSTIBLE MATERIAL— in. (mm)

Unit Top ................................14(356)

Duct Side of Unit ............................2(51)

Side Opposite Ducts ........................14(356)

Bottom of Unit .................................0

Vertical Discharge First 12 in. (305) of Supply Duct .......1(25)

NECESSARY REQUIRED CLEARANCES — in. (mm)

Between Units, Control Box Side ................42(1067)

Unit and Ungrounded Surfaces, Control Box Side ......36(914)

Unit and Block or Concrete Walls and Other Grounded

Surfaces, Control Box Side ...................42(1067)

REQUIRED CLEARANCES FOR SERVICING — in. (mm)

Evaporator Coil Access Side ...................30(762)

Control Box Access Side ......................30(762)

(Except for Necessary Requirements)

Unit Top ................................36(914)

Side Opposite Ducts ........................30(762)

NOTES:

1. Clearances must be maintained to prevent recirculation of air from

outdoor-fan discharge.

2. Dimensions in ( ) are in millimeters.

LEGEND

CG — Center of Gravity NEC — National Electrical Code COND — Condenser REQ’D — Required MAT’L — Material

UNIT

50SX

CENTER OF GRAVITY (in./mm)

XYZ

024 21.5/546 20.8/528 15.0/380 030 21.7/550 20.7/527 15.0/380 036 20.6/524 20.1/510 15.0/380

UNIT 50SX

ELECTRICAL

CHARACTERISTICS

UNIT WT CORNER WT (Lb/Kg)

Lb Kg A B C D

024 208/230-1-60 290 132 72/33 67/30 104/47 47/21 030 208/230-1-60 293 133 71/32 69/31 105/48 48/22 036 208/230-1-60, 208/230-3-60, 460-3-60 311 142 85/39 59/27 117/53 50/23

Fig. 7 — Dimensions; Units 50SX024-036 With Optional Base Rail

Page 8

Fig. 8 — Dimensions; Units 50SX042-060 Without Base Rail

Page 9

REQUIRED CLEARANCES TO COMBUSTIBLE MATERIAL — in. (mm)

Unit Top ........................................14(356)

Duct Side of Unit ...................................2(51)

Side Opposite Ducts ...............................14(356)

Bottom of Unit .........................................0

Vertical Discharge First 12 in. (305) of Supply Duct ...........1(25)

NECESSARY REQUIRED CLEARANCES — in. (mm)

Between Units, Control Box Side .....................42(1067)

Unit and Ungrounded Surfaces, Control Box Side ...........36(914)

Unit and Block or Concrete Walls and Other Grounded

Surfaces, Control Box Side .........................42(1067)

REQUIRED CLEARANCES FOR SERVICING — in. (mm)

Evaporator Coil Access Side .........................30(762)

Control Box Access Side ............................30(762)

(Except for Necessary Requirements)

Unit Top ........................................36(914)

Side Opposite Ducts ...............................30(762)

NOTES:

1. Clearancesmustbemaintained to prevent recirculation of airfromoutdoor-

fan discharge.

2. Dimensions in ( ) are in millimeters.

LEGEND

CG — Center of Gravity NEC — National Electrical Code COND — Condenser REQ’D — Required MAT’L — Material

UNIT 50SX

ELECTRICAL

CHARACTERISTICS

UNIT WT CORNER WT (Lb/Kg) Lb Kg A B C D

042 208/230-1-60, 208/230-3-60, 460-3-60 309 140 84/38 59/27 119/54 47/21 048 208/230-1-60, 208/230-3-60, 460-3-60 340 155 84/38 70/32 133/60 53/24 060 208/230-1-60, 208/230-3-60 359 163 65/30 99/45 120/55 75/34

UNIT 50SX

CENTER OF GRAVITY (in./mm)

XYZ

042 21.0/533 20.1/510 15.4/390 048 21.8/553 19.7/499 15.4/390 060 22.2/565 19.8/503 13.4/340

Fig. 8 — Dimensions; Units 50SX042-060 Without Base Rail (cont)

Page 10

Fig. 9 — Dimensions; Units 50SX042-060 With Optional Base Rail

Page 11

REQUIRED CLEARANCES TO COMBUSTIBLE MATERIAL — in. (mm)

Unit Top ........................................14(356)

Duct Side of Unit ...................................2(51)

Side Opposite Ducts ...............................14(356)

Bottom of Unit .........................................0

Vertical Discharge First 12 in. (305) of Supply Duct ...........1(25)

NECESSARY REQUIRED CLEARANCES — in. (mm)

Between Units, Control Box Side .....................42(1067)

Unit and Ungrounded Surfaces, Control Box Side ...........36(914)

Unit and Block or Concrete Walls and Other Grounded

Surfaces, Control Box Side .........................42(1067)

REQUIRED CLEARANCES FOR SERVICING — in. (mm)

Evaporator Coil Access Side .........................30(762)

Control Box Access Side ............................30(762)

(Except for Necessary Requirements)

Unit Top ........................................36(914)

Side Opposite Ducts ...............................30(762)

NOTES:

1. Clearancesmustbemaintained to prevent recirculation of airfromoutdoor-

fan discharge.

2. Dimensions in ( ) are in millimeters.

UNIT 50SX

CENTER OF GRAVITY (in./mm)

XYZ

042 20.8/529 20.2/512 17.3/440 048 21.6/548 19.8/502 17.3/440 060 22.0/560 19.9/506 15.7/399

LEGEND

CG — Center of Gravity NEC — National Electrical Code COND — Condenser REQ’D — Required MAT’L — Material

UNIT 50SX

ELECTRICAL

CHARACTERISTICS

UNIT WT CORNER WT (Lb/Kg) Lb Kg A B C D

042 208/230-1-60, 208/230-3-60, 460-3-60 329 150 89/40 64/29 124/56 52/24 048 208/230-1-60, 208/230-3-60, 460-3-60 360 164 89/40 75/34 138/63 58/26 060 208/230-1-60, 208/230-3-60 379 172 70/32 104/47 125/57 80/36

Fig. 9 — Dimensions; Units 50SX042-060 With Optional Base Rail (cont)

Page 12

PART NUMBER ‘‘A’’

FLAT

CURB

CPRFCURB001A00 89 [203] CPRFCURB002A00 119 [279] CPRFCURB003A00 149 [356]

NOTES:

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

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

3. Dimensions in [ ] are in millimeters.

4. Roof curb is made of 16 gage steel.

5. Attach ductwork to curb (ﬂanges of duct rest on curb).

6. Service clearance 4 ft on each side.

7. direction of airﬂow.

8. Insulated panels, 1-in. thick, ﬁberglass 1-lb density.

Fig. 10 — Roof Curb Dimensions

Page 13

RECEIVING AND INSTALLATION

Step 1 — Check Equipment

IDENTIFYUNIT — The unit model number and serial number are stamped on the unit identiﬁcation plate. Check this information against shipping papers.

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. 10. 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 within1⁄4inch. This is necessary for unit drain to function properly. Refer to accessory roof curb installation instructions for additional information as required.

SLAB MOUNT — Place the unit on a solid, level concrete pad that is a minimum of 4 in. thick with 2 in. above grade. The slab should extend approximately 2 in. beyond the casing on all 4 sides of the unit. Install a 6-in. gravel apron in front of condenser-air inlet to prevent obstruction of airﬂow by grass or shrubs. Do not secure the unit to the slab except when required by local codes.

Step 3 — Provide Clearances — The required mini-

mum service clearances and clearances to combustibles are shown in Fig. 2-9. Adequate ventilation and condenser air must be provided.

The condenser fan pushes air through the condenser coil and discharges it through louvers on the top cover, the decorative grille, and the compressor access panel. Be sure that the fan discharge does not recirculate to the condenser coil. Do not locate the unit in either a corner or under an overhead obstruction. The minimum clearance under a partial overhang (such as a normal house overhang) is 48 in. above the unit top. The maximum horizontal extension of a partial overhang must not exceed 48 inches.

Do not restrict condenser airﬂow. An air restriction at either the outdoor-air inlet or the fan discharge can 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. The unit may be installed on wood ﬂooring or on Class A, B, or C roof covering materials.

Step 4 — Rig and Place Unit — Use spreader bars

or crate top when rigging the unit. The units must be rigged for lifting as shown in Fig. 11 and 12. Refer to Fig. 11 and 12 for rigging weights and Tables1 and 2 for operating weights.

Use extreme caution to prevent damage when moving the unit. Unit must remain in an upright position during all rigging and moving operations.The unit must be level for proper

condensate drainage; the ground-level pad or accessory roof curb must be level before setting the unit in place. When a ﬁeld-fabricated support is used, be sure that the support is level and that it properly supports the unit.

UNITSWITHOUTBASE RAILS —Accessory rigging brackets are recommended to be used for rigging. Install brackets as follows:

Secure screws and paint protectors solidly against unit basepan to hold lifting brackets in position.

Never use lifting brackets when the temperature is below −10 F (−23 C).

Never exceed 200 lbs per bracket of lifting force. Never use lifting brackets for lifting other models of air

conditioning units. Lifting point should be directly over the unit center of

gravity.

1. Position brackets as close to the corners of unit as pos-

sible. Be sure brackets are well outside of center of gravity. (See Fig. 2, 4, 6, 8, and 11.)

2. Position paint protectors and foam strips between screws

and painted surface of unit. Tightenscrews until they make contact with the paint protectors.

3. Secure device or hook of suff icientstrength to hole in bracket

as shown in detail ‘‘A’’ of Fig. 11.

4. If wood top is available, use it for a spreader bar to pre-

vent straps from damaging unit. If wood top is not available, use spreader bars of sufficient length.

UNITS WITH OPTIONAL BASE RAILS — Keep unit upright and do not drop. Use spreader bars or top crate when rigging unit. Rollers may be used to move unit across roof. Level unit for proper condensate disposal. See Fig. 3, 5, 7, and 9 for additional information. Lifting holes are provided in base rails as shown in Fig. 12. Refer to rigging instructions on unit.

Page 14

NOTICE TO RIGGERS

Hook rigging shackles through holes in lifting brackets, as shown in Detail ‘‘A,’’lifting brackets to be centered around the unit center of gravity.Use wood top skid when rigging, to prevent rigging straps from damaging unit.

All panels must be in place when rigging.

UNIT SIZE

50SS

SHIPPING WEIGHT A B C

Lb Kg in. mm in. mm in. mm

018 260 118 36

⁄

934 18 457 241⁄

613

024 289 131 36

⁄

934 163⁄

426 241⁄

613

030 306 139 36

⁄

934 165⁄

415 241⁄

613

036 322 146 36

⁄

934 161⁄

412 241⁄

613

042 333 151 36

⁄

934 167⁄

416 281⁄

714

048 384 174 36

⁄

934 161⁄

412 341⁄

867

060 411 186 36

⁄

934 161⁄

412 341⁄

867

UNIT SIZE

50SX

SHIPPING WEIGHT A B C

Lb Kg in. mm in. mm in. mm

024 322 146 36

⁄

934 143⁄

375 281⁄

714

030 325 147 36

⁄

934 141⁄

368 281⁄

714

036 343 155 36

⁄

934 155⁄

397 281⁄

714

042 361 164 36

⁄

934 151⁄

394 341⁄

867

048 392 178 36

⁄

934 1411⁄

373 341⁄

867

060 411 186 36

⁄

934 161⁄

412 341⁄

867

NOTICE TO RIGGERS

Hook rigging shackles through holes in lifting brackets, as shown in Detail ‘‘A,’’ lifting brackets to be centered around the unit center of gravity. Use wood top skidwhen rigging, toprevent riggingstraps from damagingunit. Remove4 screws to slide wood support through rectangular hole in rail.

UNIT SIZE

50SS

SHIPPING

WEIGHT

ABC

Lb Kg in. mm in. mm in. mm

018 247 112 36.5 926.0 17.0 431 28.2 715 024 276 125 36.5 926.0 14.3 364 28.2 715 030 293 133 36.8 926.0 14.7 372 28.2 715 036 309 140 36.5 926.0 15.5 393 28.2 715 042 339 154 36.5 926.0 15.5 394 32.2 817 048 371 168 36.5 926.0 14.8 376 38.2 969 060 398 180 36.5 926.0 14.4 366 38.2 969

All panels must be in place when rigging.

UNIT SIZE

50SX

SHIPPING

WEIGHT

ABC

Lb Kg in. mm in. mm in. mm

024 309 140 36.5 926.0 15.0 380 32.2 817 030 312 141 36.5 926.0 14.8 376 32.2 817 036 330 150 36.5 926.0 15.8 402 32.2 817 042 348 158 36.5 926.0 15.6 397 38.2 969 048 379 172 36.5 926.0 14.9 378 38.2 969 060 398 180 36.5 926.0 14.4 366 38.2 969

Fig. 12 — Suggested Rigging for Units with Optional Base Rail

Fig. 11 — Suggested Rigging for Units Without Base Rail

Page 15

Table 1 — Physical Data — Unit 50SS

UNIT 50SS 018 024 030 036 042 048 060 REFRIGERANT R-22

Metering Device Acutrol™ System Charge (lb) 2.60 2.75 3.40 4.30 5.20 6.50 7.00

OPERATING WEIGHT (lb)

Without Base Rails 208 237 254 270 300 332 359

With Optional Base Rails 228 257 274 290 320 352 379 COMPRESSOR TYPE Rotary Reciprocating Reciprocating Reciprocating Reciprocating Scroll Scroll EVAPORATOR FAN Centrifugal — Direct Drive

Speeds 2333222

Nominal Rpm 825 1075 1100 1100 1100 1100 1100

Diameter (in.) 10 10 10 10 10 10 10

Width (in.) 9999999

Nominal Airﬂow (Cfm) 600 800 1000 1200 1400 1600 1995

Motor Hp

⁄

EVAPORATOR COIL

Rows...Fins/in. 3...15 3...15 3...15 3...15 3...15 3...15 4...15

Face Area (sq ft) 1.83 2.29 2.29 3.06 3.60 4.44 4.44 CONDENSER FAN Propeller — Direct Drive

Cfm 1700 1700 1900 1900 1900 2400 2400

Nominal Rpm 850 850 1050 1050 1050 1050 1050

Diameter (in.) 18 18 18 18 18 20 20

Motor Hp

⁄

CONDENSER COIL

Rows...Fins/in. 1...17 1...17 2...17 2...17 2...17 2...17 2...17

Face Area (sq ft) 5.95 5.95 5.95 5.95 7.00 8.66 8.66 FILTER SIZE (in.)*

Throwaway 20x20 20x20 20x24 20x24 24x24 24x30 24x30

*Recommended ﬁeld-supplied ﬁlters are 1 in. thick.

Table 2 — Physical Data — Unit 50SX

UNIT 50SX 024 030 036 042 048 060 REFRIGERANT R-22

Metering Device Acutrol™ System Charge (lb) 3.9 4.5 5.4 5.7 5.8 6.5

OPERATING WEIGHT (lb)

Without Base Rails 270 273 291 309 340 359

With Optional Base Rails 290 293 311 329 360 379 COMPRESSOR TYPE Scroll EVAPORATOR FAN Centrifugal — Direct Drive

Motor Type Std Std Std Std Std* ICM ICM

Speeds 33332Variable Variable

Nominal Rpm 1075 1075 1100 1100 1125 — —

Diameter (in.) 10 10 10 10 10 10 10

Width (in.) 99999 9 9

Nominal Airﬂow (Cfm) 800 1000 1200 1400 1600 1600 1995

Motor Hp

⁄

EVAPORATOR COIL

Rows...Fins/in. 2...15 3...15 4...15 3...15 4...15 4...15

Face Area (sq ft) 3.60 2.70 3.60 4.44 4.44 4.44 CONDENSER FAN Propeller — Direct Drive

Cfm 2200 2200 2200 2400 2400 2400

Nominal Rpm 1100 1100 1100 1100 1100 1050

Diameter (in.) 20 20 20 20 20 20

Motor Hp

⁄

CONDENSER COIL

Rows...Fins/in. 2...17 2...17 2...17 2...17 2...17 2...17

Face Area (sq ft) 7.00 7.00 7.00 8.66 8.66 8.66 FILTER SIZE (in.)†

Throwaway 24x24 24x24 24x24 24x30 24x30 24 x 30

LEGEND

ICM — Integrated Control Motor *460 v only.

†Recommended ﬁeld-supplied ﬁlters are 1 in. thick. NOTE: Standard motors are non-integrated control motors.

Page 16

Step 5 — Select and Install Ductwork — The de-

sign and installation of the duct system must be in accordance with the standards of the NFPA(National Fire Protection Association) for installation of nonresidence-type air conditioning and ventilating systems, NFPA90Aor residencetype,NFPA90B;and/orlocalcodesandresidence-type,NFPA90B; 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. See Fig. 2-9 for connection sizes and locations.

When designing and installing ductwork, consider the following:

When connecting ductwork to units, do not drill deeper than1⁄2inch in shaded area shown in Fig. 13 or coil may be damaged.

• All units should have ﬁeld-supplied ﬁlters or accessory ﬁl-

ter rack installed in the return-air side of the unit. Recommended sizes for ﬁlters are shown in Tables 1 and 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 weathertight 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) should extend 24-in. from electric heater element.

• Size ductwork for cooling air quantity (cfm). The mini-

mum air quantity for proper electric heater operation is listed in Table 3. Heater limit switches may trip at air quantities below those recommended.

• Insulate and weatherproof all external ductwork. Insulate

and cover with a vapor barrier all ductwork passing through conditioned spaces. Follow latest Sheet Metal andAir Conditioning Contractors National Association (SMACNA)

andAir Conditioning ContractorsAssociation (ACCA) minimum installation standards for residential heating and air conditioning systems.

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

Figure 14 shows a typical duct system with 50SS,SX

installed.

Table 3 — Minimum Airﬂow for Safe Electric

Heater Operation (Cfm)

SIZE

018* 024 030 036 042 048 060

700 700 875 1200 1225 1400 1750

*Unit 50SS only.

CONVERTING HORIZONTAL DISCHARGE UNITS TO DOWNFLOW (VERTICAL) DISCHARGE — STD (NonIntegrated Control Motor [Non-ICM] UNITS — Units are shipped in a horizontal conﬁguration. To convert a horizontal unit for downﬂow (vertical) discharge, perform the following steps:

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

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

2. Remove evaporator coil access panel (Fig. 15).

3. Locate lances in basepan insulation that are placed over the perimeter of the vertical duct opening cover (Fig. 16).

4. Using a straight edge and sharp knife, cut and remove the insulation around the perimeter of the cover. Remove the screws securing the cover to the basepan and slide out the cover. Discard the cover (Fig. 17).

Fig. 13 — Area Not To Be Drilled

Power Wiring Control Wiring

Condenser Airﬂow Evaporator Airﬂow

*Separate disconnect per NEC

(NationalElectricalCode) required for electric heater when singlepoint connection is not used.

Fig. 14 — Typical Installation

Page 17

5. Remove indoor blower access panel (Fig. 18).

6. Disconnect evaporator-fan motor leads from evaporatorfan relay and unit contactor. Carefully disengage wire tie containing evaporator-fan motor leads from the unit control box (Fig. 19).

7. Remove screws (Fig. 20) securing evaporator blower housing to blower shelf and carefully slide out blower housing. There is a ﬁller bracket attached to the blower shelf; remove this ﬁller bracket and retain for later use.

8. Locate lances in basepan insulation that are placed over the perimeter of the vertical discharge opening cover (Fig. 21).

9. Using a straight edge and sharp knife, cut the insulation around the perimeter of the cover. Remove the screws securing the cover to the basepan and slide out the cover (Fig. 22). Discard the cover. Install ﬁller bracket removed in Step 7.

10. If unit ductwork is to be attached to vertical opening ﬂanges on the unit basepan (jackstand applications only), do so at this time.

11. It is recommended that the basepan insulation around the perimeter of the vertical opening be secured to the basepan with aluminum tape to prevent the insulation from tearing or bunching up when the blower housing is installed in the vertical discharge position.

12. Orient blower housing for vertical airﬂow (blower motor adjacent to horizontal duct opening) and slide into vertical opening making sure the ﬂanges on the blower side plates engage the tabs in the unit basepan.

Resistance will be felt as the blower housing contacts the basepan insulation; this can be overcome by applying a slight force to the base of the blower. Continue sliding blower in until hole in side plate ﬂange aligns with the hole in the basepan.

Secure using screw removed in Step 7. Reconnect evaporator-fan motor leads and insert wire tie back into unit control box (Fig. 19).

13. Cover the horizontal duct openings. Duct covers can be ordered as an accessory or be ﬁeld-fabricated as shown in Fig. 23.

14. Reinstall the evaporator coil and indoor blower access panels.

15. After completing unit installation, perform all safety checks and power up unit.

ACCESS PANEL (REMOVE SCREWS)

Fig. 15 — Evaporator Coil Access Panel

Fig. 16 — Basepan Insulation Over

Vertical Duct Opening

Fig. 17 — Insulation and Cover Removed

from Vertical Duct Opening

Page 18

CONVERTING HORIZONTAL DISCHARGE UNITS TO DOWNFLOW (VERTICAL) DISCHARGE — ICM (Integrated Control Motor) UNITS — Units are shipped in a horizontal conﬁguration. To convert a horizontal unit for downﬂow (vertical) discharge, perform the following steps:

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

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

2. Remove evaporator coil access panel (Fig. 15).

3. Locate lances in basepan insulation that are placed over the perimeter of the vertical duct opening cover (Fig. 16).

5. Remove evaporator blower access panel (Fig. 18).

6. Remove screws (Fig. 20) securing evaporator blower housing to blower shelf and carefully slide out blower housing. Disconnect the plug assemblies (Fig. 24) from the evaporator-fan motor. There is a ﬁller bracket attached to the blower shelf; remove this ﬁller bracket and retain for later use. (See Fig. 24).

INDOOR BLOWER ACCESS PANEL

(REMOVE SCREWS)

Fig. 18 — Indoor Blower Access Panel

RELAYCONTACTORWIRE TIE

Fig. 19 — Fan Motor Leads

Fig. 20 — Blower Shelf and Housing

Fig. 21 — Basepan Insulation Over

Vertical Discharge Opening

Fig. 22 — Insulation and Cover Removed

from Vertical Discharge Opening

Page 19

7. Remove screws securing blower shelf to duct panel. Discard the blower shelf.

8. Locate lances in basepan insulation that are placed over the perimeter of the vertical discharge opening cover (Fig. 21).

10. If unit ductwork is to be attached to vertical opening ﬂanges on the unit basepan (jackstand applications only), do so at this time.

12. Remove screws securing the high-voltage raceway to duct panel. See Fig. 24. Temporarily place raceway on top of unit until blower housing is installed.

13. Orient blower housing for vertical airﬂow (blower motor adjacent to horizontal duct opening). See Fig. 25. Reconnect the plug assemblies. Slide blower housing into vertical opening making sure the ﬂanges on the blower side plates engage the tabs in the unit basepan.

14. Reinstall the high-voltage raceway removed in Step 12.

15. Cover the horizontal duct openings. Duct covers can be ordered as an accessory or be ﬁeld-fabricated.

16. Reinstall the evaporator coil and evaporator blower access panels.

17. After completing unit installation, perform all safety checks and power up unit.

NOTES:

1. An accessory duct cover is available as an alternative to ﬁeld fabrication.

2. Construct duct cover out of 22-gage sheet metal.

3. Dimensions in ( ) are in millimeters.

Fig. 23 — Field-Fabricated Duct Cover

Page 20

ACCESSORY DUCT FLANGE KIT INSTALLATION — Refer to Fig. 26 for duct adapter dimensions and hole locations.

1. Mark hole locations shown in Fig. 26.

2. At marked locations, drill holes using a no. 26 (.147-in.) twist drill.

3. Partially secure duct ﬂanges using two of the no. 10,

⁄2-in.

screws provided.

4. See the following caution. Using remaining holes in duct ﬂanges as templates, drill the remaining holes with the no. 26 (.147-in.) drill.

Do not drill deeper than1⁄2-in. into shaded area shown in Fig. 26. Damage to refrigerant coil could result.

5. Fully secure the duct ﬂanges using the remaining screws provided.

The ﬁnished kit installation accommodates a 143⁄4-in. x

143⁄4-in. duct.

Step 6 — Provide for Condensate Disposal

NOTE: Be sure that condensate-water disposal methods comply with local codes, restrictions, and practices.

Unit disposes of condensate through a

⁄4-in. NPT ﬁtting which exits through the compressor access panel. See Fig. 2-9 for location of condensate connection.

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. See Fig. 27. 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 2-in. trap using a

⁄4-in. FPT connection. See Fig. 27. 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. Prime the trap with water. Connect a drain tube using a minimum of3⁄4-in. PVC,3⁄4-in. CPVC, or3⁄4-in. copper pipe (all ﬁeld supplied). Do not undersize the tube. Pitch the drain tube downward at a slope of at least 1 in. for every 10 ft of horizontal run. Be sure to check the drain tube for leaks. Prime trap at the beginning of the cooling season start-up.

PLUG ASSEMBLIES

RACEWA Y

FILLER BRACKET

BLOWER SHELF

Fig. 24 — Filler Bracket and Blower Shelf

HORIZONTAL DUCT OPENING

Fig. 25 — Housing Placed for Vertical Airﬂow

NOTE: Do not drill more than1⁄2-in. deep in shaded area.

Fig. 26 — Duct Flange Kit — Locating Holes

(Typical)

Page 21

Step 7 — Install Electrical Connections

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 wire-binding screw in the control compartment, or conduit approved for electrical ground when installed in accordance with NEC (National Electrical Code), ANSI/ NFPA (latest edition) (in Canada, Canadian Electrical Code CSA C22.1) and local electrical codes. Failure to adhere to this warning could result in personal injury or death.

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 that 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 run 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 for maximum fuse/circuit breaker size and minimum circuit amps (ampacity) for wire sizing. See Tables 4A and 4B for electrical data.

The ﬁeld-supplied disconnect may be mounted on the unit

over the high-voltage inlet hole. See Fig. 2-9.

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 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 knockout on the duct panel (see Fig. 28 for location and size). When the leads are inside the unit, run leads up the high-voltage raceway to the line wiring splice box (Fig. 29). 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. 30).

CONNECTING GROUND LEAD TO WIRE-BINDING SCREW — Refer to Fig. 29 and 30. Connect the ground lead to the chassis using the wire-binding screw in the wiring splice box.

ROUTING CONTROL POWER WIRES — STD NONICM UNITS (24 v) — For all units except 50SS060, form a drip-loop with the thermostat leads before routing them into the unit. Route the thermostat leads through grommeted hole provided in unit (see Fig. 28) into unit control power splice box. Connect thermostat leads to unit control power leads as shown in Fig. 31.

For 50SS060 units, remove knockout in the duct panel (see Fig. 28).

Remove the rubber grommet from the installer’s packet (included with unit) and install it in the knockout opening. Route thermostat wires through grommet providing a drip loop at the panel. Connect low-voltage leads to the thermostat as shown in Fig. 31.

The unit transformer supplies 24-v power for complete system including accessory electrical heater. Transformer is factory wired for 230-v operation. If supply voltage is 208 v, rewire transformer primary as described in the Special Procedures for 208-v Operation section on page 24.

Fig. 27 — Condensate Trap

Page 22

Table 4A — Electrical Data — 50SS Units

UNIT SIZE

50SS

V-PH-Hz

VOLTAGE RANGE COMPRESSOR

OUTDOOR-

FAN

MOTOR

INDOOR-

FAN

MOTOR

POWER SUPPLY

AWG 60C

MIN WIRE

SIZE

MAX WIRE

LENGTH (ft)

Min Max RLA LRA FLA FLA MCA MOCP*

018 208/230-1-60 187 253 8.3 45.0 0.7 1.8 12.0 15 14 75 024 208/230-1-60 187 253 12.4 61.0 0.7 2.0 18.2 30 12 80

030

208/230-1-60 187 253 14.4 82.0 1.4 2.3 21.8 30 10 100 208/230-3-60 187 253 9.4 65.5 1.4 2.3 15.5 25 12 80

036

208/230-1-60 187 253 18.0 96.0 1.4 2.8 26.7 40 10 90 208/230-3-60 187 253 11.7 75.0 1.4 2.8 18.8 30 12 65

460-3-60 414 506 5.6 40.0 0.8 1.4 9.2 10 14 100

042

208/230-1-60 187 253 20.4 104.0 1.4 4.0 30.9 50 8 100 208/230-3-60 187 253 14.0 91.0 1.4 4.0 22.9 35 10 85

460-3-60 414 506 6.4 42.0 0.8 2.0 10.8 15 14 100

048

208/230-1-60† 187 253 21.8 124.0 2.1 5.0 40.1 60 6 100 208/230-1-60** 187 253 26.4 129.0 2.1 5.0 40.1 60 6 100 208/230-3-60† 187 253 12.8 93.0 2.1 5.0 23.1 35 10 75 208/230-3-60** 187 253 15.0 99.0 2.1 5.0 25.9 40 10 75

460-3-60† 414 506 16.0 125.0 2.1 6.8 33.0 40 8 90

460-3-60** 414 506 19.3 123.0 2.1 6.8 33.0 50 8 90

060

208/230-1-60† 187 253 28.9 165.0 2.1 6.8 49.0 60 6 100 208/230-1-60** 187 253 32.1 169.0 2.1 6.8 49.0 60 6 100 208/230-3-60† 187 253 6.4 46.5 1.1 2.3 11.4 15 14 100 208/230-3-60** 187 253 8.2 49.5 1.1 2.3 13.7 20 14 100

460-3-60† 414 506 8.0 66.5 1.1 3.2 16.8 20 12 100

460-3-60** 414 506 10.0 62.0 1.1 3.2 16.8 25 12 100

LEGEND

AWG — American Wire Gage BRKR — Breaker CUL — Canadian Underwriters’ Laboratories FLA — Full Load Amps HACR — Heating, Air Conditioning and

Refrigeration

LRA — Locked Rotor Amps MCA — Minimum Circuit Amps MOCP — Maximum Overcurrent Protection NEC — National Electrical Code RLA — Rated Load Amps

*Fuse or HACR Breaker.

†Carrier Scroll Compressor.

**Copeland Scroll Compressor. NOTES:

1. In compliance with NEC requirements for multimotor and combination load equipment (refer to NEC Articles 430 and 440), the overcurrent protective device for the unit shall be fuse or HACR breaker. The CUL 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

max voltage deviation from average voltage

= 100 x

average voltage

EXAMPLE: Supply voltage is 460-3-60.

AB = 452 v BC = 464 v AC = 455 v

452 + 464 + 455

Average Voltage =

1371

= 457

Determine maximum deviation from average voltage.

(AB) 457 – 452=5v (BC) 464 – 457=7v (AC) 457 – 455=2v

Maximum deviation is 7 v. Determine percent of voltage imbalance.

% Voltage Imbalance = 100 x

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.

Page 23

Table 4B — Electrical Data — 50SX Units

UNIT SIZE

50SX

V-PH-Hz

VOLTAGE RANGE COMPRESSOR

OUTDOOR-

FAN

MOTOR

INDOOR-

FAN

MOTOR

POWER SUPPLY

AWG 60C

MIN WIRE

SIZE

MAX WIRE

LENGTH (ft)

Min Max RLA LRA FLA FLA MCA MOCP*

024 208/230-1-60 187 253 12.9 62.5 1.4 2.0 19.5 30 12 75 030 208/230-1-60 187 253 15.0 76.0 1.4 2.6 22.8 30 10 100

036

208/230-1-60 187 253 16.7 95.0 1.4 2.8 25.1 30 10 95 208/230-3-60 187 253 10.9 75.0 1.4 2.8 17.8 25 12 70

460-3-60 414 506 5.4 40.0 0.8 1.4 9.0 10 14 100

042

208/230-1-60 187 253 20.0 104.0 1.4 3.1 29.5 45 10 80 208/230-3-60 187 253 13.9 88.0 1.4 3.1 21.9 30 10 60

460-3-60 414 506 6.8 44.0 0.8 1.6 10.9 15 14 100

048

208/230-1-60 187 253 26.4 129.0 1.4 7.2 41.6 60 6 100 208/230-3-60 187 253 15.0 99.0 1.4 7.2 27.4 40 10 70

460-3-60 414 506 8.2 49.5 0.8 2.3 13.4 20 14 100

060

208/230-1-60 187 253 32.1 169.0 2.1 7.2 49.4 60 6 100 208/230-3-60 187 253 19.3 123.0 2.1 7.2 33.4 50 8 90

LEGEND

AWG — American Wire Gage BRKR — Breaker CUL — Canadian Underwriters’ Laboratories FLA — Full Load Amps HACR — Heating, Air Conditioning and

Refrigeration

LRA — Locked Rotor Amps MCA — Minimum Circuit Amps MOCP — Maximum Overcurrent Protection NEC — National Electrical Code RLA — Rated Load Amps

*Fuse or HACR Breaker.

†Carrier Scroll Compressor.

**Copeland Scroll Compressor. NOTES:

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

max voltage deviation from average voltage

= 100 x

average voltage

EXAMPLE: Supply voltage is 460-3-60.

AB = 452 v BC = 464 v AC = 455 v

452 + 464 + 455

Average Voltage =

1371

= 457

Determine maximum deviation from average voltage.

(AB) 457 – 452=5v (BC) 464 – 457=7v (AC) 457 – 455=2v

Maximum deviation is 7 v. Determine percent of voltage imbalance.

% Voltage Imbalance = 100 x

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.

Page 24

ROUTING CONTROL POWER WIRES — ICM UNITS (24 v) — Remove knockout in the duct panel (see Fig. 28). Remove the rubber grommet from the installer’s packet (included with unit) and install it in the knockout opening. Route thermostat wires through grommet providing a drip loop at the panel. Connect low-voltage leads to the thermostat as shown in Fig. 31-34.

The Easy Select interface board is located in the return-air section and is attached to the duct panel. The Easy Select interface board is factory wired to the motor and factory default selections are preset.

SPECIAL PROCEDURES FOR 208-V OPERATION

Make sure that the power supply to the unit is switched OFF before making any wiring changes. Electrical shock can cause personal injury or death.

1. Disconnect the orange transformer-primary lead from the contactor. See unit wiring label.

2. Remove the wirenut from the terminal on the end of the red transformer-primary lead.

3. Save the wirenut.

4. Connect the red lead to the contactor terminal from which the orange lead was disconnected.

5. Using the wirenut removed from the red lead, insulate the loose terminal on the orange lead.

6. Wrap the wirenut with electrical tape so that the metal terminal cannot be seen.

Indoor blower-motor speeds may need to be changed for 208-v operation. Refer to Indoor Airﬂow and Airﬂow Adjustments section on page 34.

1 3/8″ DIA.

1 1/8″ DIA.

HIGH VOLTAGE POWER ENTRY (KNOCKOUT)

2″ DIA.

7/8″ DIA. CONTROL POWER ENTRY*

*Knockout on rectangular-duct panel units; entry hole on round-duct

panel units.

NOTE: For rectangular duct knockout sizes, see Fig. 2-9.

Fig. 28 — Typical Duct Panel Knockouts

UNIT LINE WIRE SPLICE BOX

UNIT POWER LEAD

WIRE-BINDING SCREW

CONTROL POWER SPLICE BOX

Fig. 29 — Wiring Splice Boxes

Field Wiring

Splice Connections NEC — National Electrical Code NOTE: Use copper wire only.

Fig. 30 — Line Power Connections

Fig. 31 — Control Connections

Page 25

LEGEND

IFO — Indoor Fan On JW — Jumper Wire

C—Contactor, Compressor COM — Common CTD — Compressor Time Delay FU — Fuse HR — Heater Relay ICM — Integrated Control Motor IFO — Indoor Fan On PL — Plug TRAN — Transformer

Field Splice Terminal (Marked)

Fig. 33 — Units 50SX048,060 — 208/230-1-60, Integrated Control Motor Wiring Schematic

Fig. 32 — Easy Select Interface Board

LEGEND

Terminal (Unmarked) Terminal Block Splice

Factory Wiring Field Control Wiring Field Power Wiring Accessory or Optional Wiring To Represent Common Potential Only.

Not to Represent Wiring

Page 26

PRE-START-UP

Failure to observe the following warnings could result in serious personal injury:

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 all pressure from both high- and lowpressure sides of the system before touching or disturbing anything inside terminal box if refrigerant leak is suspected around compressor terminals. Use accepted methods to recover refrigerant.

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 all pressure from system using both high-

and low-pressure ports. Use accepted methods to recover refrigerant.

c. Cut component connecting tubing with tubing cut-

ter 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 all access panels.

2. Read and follow instructions on all WARNING, CAU-

TION, and INFORMATION labels attached to, or shipped with, unit.

Make the following inspections: a. Inspect for shipping and handling damages such as bro-

ken 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.

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 han-

dling, carefully straighten ﬁns with a ﬁn comb.

3. Verify the following conditions:

a. Make sure that outdoor-fan blade is correctly posi-

tioned in fan oriﬁce. Leading edge of blade should be 2 in. back from condenser inlet grille or

⁄2in. maxi-

mum from fan deck. b. Make sure that air ﬁlter(s) is in place. c. Make sure that condensate drain pan and trap are filled

with water to ensure proper drainage. d. Make sure that all tools and miscellaneous loose parts

have been removed.

C—Contactor, Compressor COM — Common CTD — Compressor Time Delay FU — Fuse HR — Heater Relay ICM — Integrated Control Motor IFO — Indoor Fan On PL — Plug TRAN — Transformer

Field Splice Terminal (Marked)

Fig. 34 — Unit 50SX048,060 — 208/230-3-60 Integrated Control Motor Wiring Schematic

Terminal (Unmarked) Terminal Block Splice

Factory Wiring Field Control Wiring Field Power Wiring

Accessory or Optional Wiring To Indicate Common Potential Only.

Not to Represent Wiring

LEGEND

Page 27

4. If the unit is equipped with a crankcase heater, start the heater 24 hours before starting the unit. To start the heater only, turn the thermostat to the OFF position and energize the electrical disconnect to the unit.

START-UP

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

and proceed as follows:

Check for Refrigerant Leaks — Locate and repair

refrigerant leaks and charge the unit as follows:

1. Using both high- and low-pressure ports, locate leaks and reclaim remaining refrigerant to relieve system pressure.

2. Repair leak following accepted practices. NOTE: Install a 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.

Start-Up Cooling Section and Make Adjustments

Complete the required procedures given in the PreStart-Up section page 25 before starting the unit.

Do not jumper any safety devices when operating the unit.

Do not operate the compressor when the outdoor temperature is below 40 F (unless accessory low-ambient kit is installed).

Do not rapid-cycle the compressor. Allow 5 minutes between ‘‘on’’ cycles to prevent compressor damage.

CHECKING COOLING CONTROL OPERATION — Start and check the unit for proper cooling control operation as follows:

1. Place room thermostat SYSTEM switch in OFF position. Observe that blower motor starts when FANswitchis placed in ON position and shuts down when FANswitch is placed in AUTO. position.

2. Place SYSTEM switch in COOLposition and F A Nswitch in AUTO. position. Set cooling control below room temperature. Observe that compressor,condenser fan, and evaporator blower motors start. Observe that cooling cycle shuts down when control setting is satisﬁed.

3. 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).

IMPORTANT: Three-phase, scroll compressors in the 50SS048,060 and 50SX036-060 units are direction-oriented. These units must be checked to ensure proper compressor 3-phase power lead orientation. If not corrected within 5 minutes, 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.

CHECKINGAND 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.

A superheat charging label is attached to the outside of the compressor access door. The label includes a ‘‘Superheat Charging Table’’ and a ‘‘Required Suction-Tube Temperature (F)’’ chart.

An accurate superheat, thermocouple-, or thermistor-type thermometer, a sling psychrometer, and a gage manifold are required when using the superheat charging method for evaluating the unit charge. Do not use mercury or small dial-type

thermometers, because they are not adequate for this type of measurement.

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.

Proceed as follows:

1. Remove caps from low- and high-pressure service

ﬁttings.

2. Using hoses with valve core depressors, attach low- and

high-pressure gage hoses to low- and high-pressure service ﬁttings, respectively.

3. Start unit in cooling mode and let unit run until system

pressures stabilize.

4. Measure and record the following:

a. Outdoor ambient-air temperature (F db). b. Evaporator inlet-air temperature (F wb).

Page 28

c. Suction-tube temperature (F) at low-side service

ﬁtting.

d. Suction (low-side) pressure (psig).

5. Using ‘‘Superheat Charging Table,’’ compare outdoor-air temperature (F db) with evaporator inlet-air temperature (F wb) to determine desired system operating superheat temperature. See Tables 5A-5I and 6A-6F.

6. Using ‘‘Required Suction-Tube Temperature (F)’’ table, compare desired superheat temperature with suction (low-side) operating pressure (psig) to determine proper suction-tube temperature. See Table 7.

7. Compare actual suction-tube temperature with proper suction-tube temperature. Using a tolerance of ±3° F, add refrigerant if actual temperature is more than 3° F higher than proper suction-tube temperature, or remove refrigerant if actual temperature is more than 3° F lower than required suction-tube temperature.

NOTE: If the problem causing the inaccurate readings is a refrigerant leak, refer to Check for Refrigerant Leaks section on page 27.

Table 5A — Superheat Charging Table, 50SS018

TEMP (F)

AIR ENT

COND

EVAP AIR — CFM

600

Evap Air — Ewb (F)

54 56 58 60 62 64 66 68 70 72 74 76

65 SPH 17.3 18.5 19.6 20.8 24.2 27.7 28.5 29.3 29.3 29.3 29.3 29.3 70 SPH 13.8 14.9 16.1 17.3 20.7 24.1 25.7 27.3 27.3 27.3 27.3 27.3 75 SPH 10.2 11.4 12.5 13.7 17.1 20.6 22.9 25.2 25.2 25.2 25.2 25.2 80 SPH 8.2 8.8 9.5 10.2 13.6 17.0 20.1 23.1 23.9 24.1 25.4 26.1 85 SPH 6.1 6.2 6.5 6.6 10.0 13.5 17.3 21.1 22.6 24.1 25.6 27.1 90 SPH * * * 5.0 8.1 11.4 15.2 19.0 20.5 22.0 23.5 25.0

95 SPH ****6.29.413.2 17.0 18.5 20.0 21.5 23.0 100 SPH *****7.311.114.9 17.2 19.5 21.7 24.0 105 SPH *****5.39.112.9 15.9 18.9 21.9 24.9 110 SPH ******6.710.8 13.8 16.8 19.8 22.8 115 SPH *******8.811.814.8 17.8 20.8

LEGEND

Ewb — Entering Wet Bulb SPH — Superheat at Compressor (F)

*Do not attempt to charge system under these conditions — refrigerant slugging may occur.

Table 5B — Superheat Charging Table, 50SS024

TEMP (F)

AIR ENT

COND

EVAP AIR — CFM

800

Evap Air — Ewb (F)

54 56 58 60 62 64 66 68 70 72 74 76

65 SPH 18.2 19.0 19.9 20.7 22.5 24.2 25.1 25.9 26.6 27.2 27.9 28.6

70 SPH 17.1 17.6 18.1 18.6 20.4 22.1 23.0 23.9 24.9 26.0 27.1 28.1

75 SPH 16.0 16.2 16.4 16.6 18.3 20.1 21.0 21.8 23.3 24.8 26.2 27.7

80 SPH 14.8 14.7 14.6 14.5 16.3 18.0 19.7 21.3 22.4 23.5 24.6 25.8

85 SPH 13.7 13.3 12.9 12.5 14.3 16.0 18.4 20.7 21.5 22.3 23.1 23.8

90 SPH 11.1 10.9 10.7 10.4 12.2 13.9 16.3 18.7 19.9 21.0 22.2 23.4

95 SPH 8.5 8.4 8.4 8.4 10.1 11.9 14.3 16.6 18.2 19.8 21.4 23.0 100 SPH 7.3 7.5 7.7 7.9 8.9 9.9 12.2 14.6 16.6 18.6 20.6 22.6 105 SPH 6.2 6.6 6.9 7.3 7.6 7.8 10.2 12.5 14.9 17.3 19.7 22.1 110 SPH * * * 5.3 5.5 5.8 8.1 10.5 13.3 16.1 18.9 21.7 115 SPH ******6.18.411.614.9 18.1 21.3

LEGEND

Ewb — Entering Wet Bulb SPH — Superheat at Compressor (F)

*Do not attempt to charge system under these conditions — refrigerant slugging may occur.

Page 29

Table 5C — Superheat Charging Table, 50SS030

TEMP (F)

AIR ENT

COND

EVAP AIR — CFM

1000

Evap Air — Ewb (F)

54 56 58 60 62 64 66 68 70 72 74 76

65 SPH 14.2 15.1 16.1 17.1 19.2 21.3 23.3 24.7 25.9 27.2 27.8 28.5 70 SPH 13.6 14.1 14.6 15.0 17.1 19.2 21.3 22.8 24.2 25.7 26.3 26.9 75 SPH 13.0 13.0 13.0 13.0 15.1 17.2 19.2 20.9 22.6 24.2 24.8 25.4 80 SPH 10.9 11.0 11.0 10.9 13.6 16.1 18.7 20.1 21.4 22.7 23.6 24.4 85 SPH 8.9 8.9 8.9 8.9 12.0 15.1 18.2 19.2 20.2 21.2 22.4 23.5 90 SPH 8.3 8.4 8.4 8.3 10.9 13.6 16.2 17.7 19.2 20.8 21.6 22.5

95 SPH 7.8 7.8 7.8 7.8 9.9 12.0 14.1 16.1 18.2 20.2 20.9 21.7 100 SPH 7.3 7.3 7.3 7.3 9.3 11.4 13.6 15.6 17.6 19.7 20.2 20.7 105 SPH 6.7 6.7 6.7 6.7 8.8 10.9 13.0 15.0 17.1 19.1 19.4 19.8 110 SPH ****6.78.910.9 13.0 15.0 17.1 18.0 18.9 115 SPH *****6.88.910.9 13.0 15.0 16.5 18.0

LEGEND

Ewb — Entering Wet Bulb SPH — Superheat at Compressor (F)

*Do not attempt to charge system under these conditions — refrigerant slugging may occur.

Table 5D — Superheat Charging Table, 50SS036

TEMP (F)

AIR ENT

COND

EVAP AIR — CFM

1200

Evap Air — Ewb (F)

54 56 58 60 62 64 66 68 70 72 74 76

65 SPH 8.4 8.4 8.4 8.4 12.5 16.7 18.7 20.7 22.0 23.4 24.8 26.1

70 SPH 5.0 5.0 5.0 5.0 9.0 13.1 15.9 18.6 20.0 21.3 22.7 24.0

75 SPH ****5.49.613.1 16.6 17.9 19.3 20.6 22.0

80 SPH **** * 6.010.3 14.5 15.9 17.3 18.6 20.0

85 SPH **** * * 7.512.5 13.9 15.2 16.5 17.9

90 SPH **** * * 5.410.4 12.5 14.6 16.8 18.8

95 SPH **** * * * 8.411.314.1 17.0 19.8 100 SPH **** * * * 6.410.0 13.5 17.1 20.7 105 SPH **** ****8.713.0 17.3 21.7 110 SPH **** ****9.312.4 15.6 18.7 115 SPH **** ****10.0 11.9 13.8 15.8

LEGEND

Ewb — Entering Wet Bulb SPH — Superheat at Compressor (F)

*Do not attempt to charge system under these conditions — refrigerant slugging may occur.

Table 5E — Superheat Charging Table, 50SS042

TEMP (F)

AIR ENT

COND

EVAP AIR — CFM

1400

Evap Air — Ewb (F)

54 56 58 60 62 64 66 68 70 72 74 76

65 SPH 11.0 11.0 11.0 14.0 17.0 20.0 22.0 24.0 26.0 26.0 27.7 28.6

70 SPH 7.5 7.5 7.5 10.4 13.4 16.4 18.9 21.4 24.0 25.0 26.1 27.1

75 SPH * * * 6.9 9.9 12.9 15.9 18.9 21.9 23.2 24.4 25.7

80 SPH * * * 5.9 8.4 10.8 13.8 16.8 19.8 21.3 22.8 24.3

85 SPH * * * 5.0 6.9 8.8 11.8 14.8 17.8 19.5 21.1 22.8

90 SPH * * * * 6.0 6.8 10.2 13.7 17.3 18.6 20.0 21.4

95 SPH * * * * * 5.0 8.7 12.7 16.7 17.8 18.9 20.0 100 SPH ******6.510.5 14.6 16.4 18.2 20.0 105 SPH *******8.412.6 15.1 17.6 20.0 110 SPH *******8.012.0 14.2 16.4 18.6 115 SPH *******7.711.513.4 15.3 17.2

LEGEND

Ewb — Entering Wet Bulb SPH — Superheat at Compressor (F)

Page 30

Table 5F — Superheat Charging Table, 50SS048 (Carrier Scroll Compressor)

TEMP (F)

AIR ENT

COND

EVAP AIR — CFM

1600

Evap Air — Ewb (F)

54 56 58 60 62 64 66 68 70 72 74 76

65 SPH 15.5 15.5 15.6 15.6 17.6 19.6 21.6 22.8 24.0 25.2 25.2 25.3 70 SPH 11.7 11.8 11.8 11.8 13.9 16.0 18.0 20.1 22.2 24.3 24.3 24.3 75 SPH 8.0 8.0 8.0 8.0 10.2 12.3 14.5 17.4 20.4 23.3 23.3 23.3 80 SPH 6.0 6.0 6.0 6.0 8.7 11.3 13.9 16.3 18.6 20.9 21.5 22.0 85 SPH ****7.210.3 13.4 15.1 16.8 18.5 19.7 20.8 90 SPH ****5.67.79.912.4 15.0 17.6 18.7 19.8

95 SPH *****5.26.39.813.2 16.7 17.7 18.8 100 SPH ******5.89.112.5 15.8 17.1 18.4 105 SPH ******5.28.411.714.9 16.5 18.1 110 SPH ******6.28.811.414.0 15.9 17.8 115 SPH ******7.19.111.113.1 15.3 17.5

LEGEND

Ewb — Entering Wet Bulb SPH — Superheat at Compressor (F)

*Do not attempt to charge system under these conditions — refrigerant slugging may occur.

Table 5G — Superheat Charging Table, 50SS048 (Copeland Scroll Compressor)

TEMP (F)

AIR ENT

COND

EVAP AIR — CFM

1600

Evap Air — Ewb (F)

54 56 58 60 62 64 66 68 70 72 74 76

65 SPH 19.0 19.0 19.0 19.0 21.7 24.3 26.0 27.7 27.9 28.2 28.4 28.6

70 SPH 15.4 15.4 15.4 15.4 18.1 20.8 22.5 24.1 25.1 26.1 27.1 28.1

75 SPH 11.9 11.9 11.9 11.9 14.6 17.2 18.9 20.6 22.3 24.0 25.8 27.5

80 SPH 8.4 8.4 8.4 8.4 11.0 13.7 15.4 17.0 19.5 22.0 24.5 27.0

85 SPH 5.0 5.0 5.0 5.0 7.5 10.1 11.8 13.5 16.7 20.0 23.2 26.4

90 SPH *****6.69.011.414.7 17.9 21.1 24.4

95 SPH ******6.29.412.6 15.9 19.1 22.3 100 SPH *******7.310.6 13.8 17.0 20.3 105 SPH *******5.38.511.815.0 18.2 110 SPH ********6.911.215.5 19.8 115 SPH ********5.310.6 16.0 21.3

LEGEND

Ewb — Entering Wet Bulb SPH — Superheat at Compressor (F)

*Do not attempt to charge system under these conditions — refrigerant slugging may occur.

Table 5H — Superheat Charging Table, 50SS060 (Carrier Scroll Compressor)

TEMP (F)

AIR ENT

COND

EVAP AIR — CFM

1600

Evap Air — Ewb (F)

54 56 58 60 62 64 66 68 70 72 74 76

65 SPH 8.9 8.9 9.0 9.0 12.1 15.2 18.3 20.4 22.4 24.5 24.5 24.5

70 SPH 5.0 5.0 5.0 5.0 7.4 11.1 14.7 17.3 19.9 22.5 22.9 23.3

75 SPH **** * 6.911.214.3 17.3 20.4 21.3 22.1

80 SPH **** * * 5.69.413.1 16.8 18.4 19.9

85 SPH **** ****8.913.3 15.4 17.6

90 SPH **** ****6.411.313.3 15.3

95 SPH **** * * * * * 9.211.113.1 100 SPH **** *****7.29.712.3 105 SPH **** *****5.18.311.5

110 SPH **** ******6.910.8 115 SPH **** ******5.510.0

LEGEND

Ewb — Entering Wet Bulb SPH — Superheat at Compressor (F)

*Do not attempt to charge system under these conditions — refrigerant slugging may occur.

Page 31

Table 5I — Superheat Charging Table, 50SS060 (Copeland Scroll Compressor)

TEMP (F)

AIR ENT

COND

EVAP AIR — CFM

1995

Evap Air — Ewb (F)

54 56 58 60 62 64 66 68 70 72 74 76

65 SPH 20.1 20.1 20.1 20.1 20.1 20.1 22.6 25.2 25.6 26.1 26.6 27.0 70 SPH 16.5 16.5 16.5 16.5 17.3 18.0 20.6 23.1 24.0 24.8 25.6 26.5 75 SPH 13.0 13.0 13.0 13.0 14.5 16.0 18.5 21.1 22.3 23.5 24.7 25.9 80 SPH 10.9 10.9 10.9 10.9 12.4 13.9 16.5 19.0 20.6 22.2 23.8 25.4 85 SPH 8.9 8.9 8.9 8.9 10.4 11.9 14.4 17.0 18.9 20.9 22.9 24.9 90 SPH 6.9 6.9 6.9 6.9 8.4 9.9 12.4 14.9 17.3 19.6 22.0 24.3

95 SPH 5.0 5.0 5.0 5.0 6.3 7.8 10.3 12.9 15.6 18.3 21.1 23.8 100 SPH *****5.88.310.8 13.9 17.0 20.1 23.2 105 SPH ******6.28.812.3 15.7 19.2 22.7 110 SPH *******6.710.6 14.4 18.3 22.2 115 SPH ********8.913.1 17.4 21.6

LEGEND

Ewb — Entering Wet Bulb SPH — Superheat at Compressor (F)

*Do not attempt to charge system under these conditions — refrigerant slugging may occur.

Table 6A — Superheat Charging Table, 50SX024

TEMP (F)

AIR ENT

COND

EVAP AIR — CFM

800

Evap Air — Ewb (F)

54 56 58 60 62 64 66 68 70 72 74 76

65 SPH 22.1 22.1 22.8 23.2 25.3 27.4 29.5 29.8 30.2 30.5 31.3 32.1

70 SPH 18.5 18.9 19.3 19.6 22.2 24.8 27.5 28.3 29.1 30.0 30.0 30.0

75 SPH 15.0 15.4 15.7 16.1 19.2 22.3 25.4 26.7 28.1 29.4 28.7 28.0

80 SPH 9.2 9.5 9.7 9.9 14.4 18.9 23.3 24.7 26.0 27.3 27.4 27.4

85 SPH ****9.615.5 21.3 22.6 24.0 25.3 26.1 26.8

90 SPH ****7.212.5 17.8 20.1 22.4 24.8 25.1 25.5

95 SPH *****9.414.2 17.5 20.9 24.2 24.2 24.2 100 SPH *****7.110.6 14.5 18.3 22.1 22.9 23.6 105 SPH ******7.111.415.8 20.1 21.6 23.1 110 SPH *******8.413.2 18.0 19.5 21.0 115 SPH *******5.310.7 16.0 17.5 19.0

LEGEND

Ewb — Entering Wet Bulb SPH — Superheat at Compressor (F)

*Do not attempt to charge system under these conditions — refrigerant slugging may occur.

Table 6B — Superheat Charging Table, 50SX030

TEMP (F)

AIR ENT

COND

EVAP AIR — CFM

1000

Evap Air — Ewb (F)

54 56 58 60 62 64 66 68 70 72 74 76

65 SPH 11.2 11.2 11.2 11.2 14.9 18.6 22.3 22.4 22.5 22.7 22.9 23.1

70 SPH 7.6 7.7 7.7 7.7 12.1 16.6 21.1 21.6 22.0 22.4 22.5 22.5

75 SPH ****9.414.7 20.0 20.7 21.4 22.1 22.1 22.0

80 SPH ****8.513.5 18.5 19.3 20.2 21.0 21.6 22.1

85 SPH ****7.612.3 17.0 18.0 18.9 19.9 21.1 22.3

90 SPH *****10.0 14.2 16.0 17.8 19.6 20.7 21.8

95 SPH *****7.711.514.1 16.7 19.2 20.2 21.2 100 SPH * * * * * * 5.7 9.9 14.0 18.2 19.4 20.6 105 SPH *******5.711.417.1 18.6 20.1 110 SPH ********8.913.5 15.8 18.0 115 SPH *********10.0 13.0 16.0

LEGEND

Ewb — Entering Wet Bulb SPH — Superheat at Compressor (F)

*Do not attempt to charge system under these conditions — refrigerant slugging may occur.

Page 32

Table 6C — Superheat Charging Table, 50SX036

TEMP (F)

AIR ENT

COND

EVAP AIR — CFM

1200

Evap Air — Ewb (F)

54 56 58 60 62 64 66 68 70 72 74 76

65 SPH 21.3 21.3 21.3 21.3 22.0 22.6 23.3 23.5 23.7 23.8 23.3 22.8 70 SPH 19.3 19.3 19.3 19.3 20.2 21.2 22.2 22.3 22.5 22.6 22.0 21.5 75 SPH 17.2 17.2 17.2 17.2 18.5 19.7 21.0 21.1 21.3 21.4 20.7 20.1 80 SPH 13.6 13.6 13.6 13.6 15.1 16.6 18.0 18.5 18.9 19.3 19.4 19.5 85 SPH 10.1 10.1 10.1 10.1 11.7 13.4 15.0 15.8 16.5 17.3 18.1 19.0 90 SPH 6.5 6.5 6.5 6.5 8.8 11.2 13.5 14.6 15.7 16.8 17.2 17.6

95 SPH ****6.09.012.0 13.4 14.8 16.2 16.2 16.2 100 SPH ******6.08.711.414.1 14.9 15.6 105 SPH ********8.012.1 13.6 15.1 110 SPH *********10.0 11.5 13.0 115 SPH *********8.09.511.0

LEGEND

Ewb — Entering Wet Bulb SPH — Superheat at Compressor (F)

*Do not attempt to charge system under these conditions — refrigerant slugging may occur.

Table 6D — Superheat Charging Table, 50SX042

TEMP (F)

AIR ENT

COND

EVAP AIR — CFM

1400

Evap Air — Ewb (F)

54 56 58 60 62 64 66 68 70 72 74 76

65 SPH 23.9 23.9 23.9 23.9 24.4 24.9 25.5 25.8 26.1 26.5 25.6 24.7

70 SPH 21.9 21.9 21.9 21.9 22.4 22.9 23.4 23.7 24.1 24.5 24.0 23.5

75 SPH 19.8 19.8 19.8 19.8 20.3 20.8 21.3 21.7 22.0 22.4 22.4 22.4

80 SPH 16.3 16.3 16.3 16.3 17.9 19.6 21.3 21.5 21.7 21.8 21.8 21.8

85 SPH 12.7 12.7 12.7 12.7 15.6 18.4 21.3 21.3 21.3 21.3 21.3 21.3

90 SPH 9.2 9.2 9.2 9.2 12.0 14.9 17.8 18.7 19.7 20.8 20.8 20.8

95 SPH 5.6 5.6 5.6 5.6 8.5 11.3 14.2 16.2 18.2 20.2 20.2 20.2 100 SPH *****8.010.6 13.1 15.6 18.1 18.9 19.6 105 SPH ******7.110.1 13.1 16.1 17.6 19.1 110 SPH *******7.010.5 14.0 15.5 17.0 115 SPH ********8.012.0 13.5 15.0

LEGEND

Ewb — Entering Wet Bulb SPH — Superheat at Compressor (F)

*Do not attempt to charge system under these conditions — refrigerant slugging may occur.

Table 6E — Superheat Charging Table, 50SX048

TEMP (F)

AIR ENT

COND

EVAP AIR — CFM

1600

Evap Air — Ewb (F)

54 56 58 60 62 64 66 68 70 72 74 76

65 SPH 27.2 27.2 27.2 27.2 27.0 26.7 26.5 26.0 25.6 25.1 24.5 24.0

70 SPH 25.0 25.0 25.0 25.0 24.8 24.6 24.5 24.5 24.5 24.6 23.8 23.1

75 SPH 22.8 22.8 22.8 22.8 22.7 22.5 22.4 22.9 23.5 24.0 23.1 22.2

80 SPH 20.6 20.6 20.6 20.6 20.5 20.4 20.3 21.4 22.4 23.5 22.4 21.4

85 SPH 18.3 18.3 18.3 18.3 18.3 18.3 18.3 19.8 21.4 22.9 21.8 20.6

90 SPH 13.3 13.3 13.3 13.3 14.2 15.2 16.3 17.8 19.3 20.9 20.4 19.9

95 SPH 8.2 8.2 8.2 8.2 10.2 12.2 14.2 15.7 17.3 18.8 19.0 19.2 100 SPH ****6.38.410.6 12.9 15.2 17.5 18.1 18.7 105 SPH ******7.110.1 13.1 16.1 17.1 18.2 110 SPH *******7.110.5 14.0 15.3 16.6 115 SPH ********8.012.0 13.5 15.0

LEGEND

Ewb — Entering Wet Bulb SPH — Superheat at Compressor (F)

*Do not attempt to charge system under these conditions — refrigerant slugging may occur.

Page 33

Table 6F — Superheat Charging Table, 50SX060

TEMP (F)

AIR ENT

COND

EVAP AIR — CFM

1995

Evap Air — Ewb (F)

54 56 58 60 62 64 66 68 70 72 74 76

LEGEND

Ewb — Entering Wet Bulb SPH — Superheat at Compressor (F)

*Do not attempt to charge system under these conditions — refrigerant slugging may occur.

Table 7 — Required Suction-Tube Temperature (F)*

SUPERHEAT

TEMP (F)

SUCTION PRESSURE AT SERVICE PORT (psig)

61.5 64.2 67.1 70.0 73.0 76.0 79.2 82.4 85.7

0 35 37 39 41 43 45 47 49 51 2 37 39 41 43 45 47 49 51 53 4 39 41 43 45 47 49 51 53 55 6 41 43 45 47 49 51 53 55 57

8 43 45 47 49 51 53 55 57 59 10 45 47 49 51 53 55 57 59 61 12 47 49 51 53 55 57 59 61 63 14 49 51 53 55 57 59 61 63 65 16 51 53 55 57 59 61 63 65 67 18 53 55 57 59 61 63 65 67 69 20 55 57 59 61 63 65 67 69 71 22 57 59 61 63 65 67 69 71 73 24 59 61 63 65 67 69 71 73 75 26 61 63 65 67 69 71 73 75 77 28 63 65 67 69 71 73 75 77 79 30 65 67 69 71 73 75 77 79 81 32 67 69 71 73 75 77 79 81 83 34 69 71 73 75 77 79 81 83 85 36 71 73 75 77 79 81 83 85 87 38 73 75 77 79 81 83 85 87 89 40 75 77 79 81 83 85 87 89 91

*Temperature at suction service valve.

Page 34

INDOOR AIRFLOW AND AIRFLOW ADJUSTMENTS

For cooling operation, the recommended airﬂow is 350 to 450 cfm per each 12,000 Btuh of rated cooling capacity.

Tables 8-11 show airﬂows at several external static pressures.Table12 shows airﬂow for Fan Only and Cooling modes for ICM units. Tables 13-15 show accompanying pressure drops for wet coils, electric heaters, and ﬁlters. 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.

Disconnect electrical power to the unit before changing blower speed. Electrical shock can cause personal injury or death.

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

Unit 50SS two- or 3-speed motors are factory wired for low speed operation. Units 50SX024, 036 and 048 (460 v) two- or 3-speed motors are factory wired for low speed. Units 50SX030 and 042 are factory wired for medium speed.

For 208/230-v and A.O. Smith 460-v Blower Motors:

The motor leads are color-coded as follows:

3-SPEED 2-SPEED

black = high speed black = high speed

blue = medium speed red = low speed

red = low speed

To change the speed of the blower motor, remove the fan motor speed leg lead from the indoor (evaporator) fan relay (IFR) and replace with lead for desired blower motor speed.

Insulate the removedlead to avoid contact with chassis parts.

For 460-v GE Motors:

The motor leads are color coded as follows:

3-SPEED 2-SPEED

black = high black = high

blue = jumper blue = jumper

orange = medium red = low

red = low

To change the speed of the blower motor, remove red fan motor speed lead from the indoor (evaporator) fan relay (IFR). The motor speed lead is attached to terminal BM. Insulate removed lead end to avoid contact with chassis parts. On 3-speed motors only, connect orange lead to IFR. To select high speed, separate the black (female QC) from the blue lead (male QC) and connect the black lead to IFR. Insulate

the blue lead to avoid contact with any chassis parts.

For Integrated Control Motors (ICM) — Toconﬁgure the 50SX unit, move the 5 Easy Select board wires to the terminals which control the airﬂow. Refer to the Easy Select interface board (Fig. 32) located next to the terminal and to Fig. 33 and 34.

Perform the following steps for basic system conﬁguration.

AUX HEAT RANGE (VIO)

NOTE: If no heater is installed, this step can be omitted.

The airﬂow for electric heat is selected with theAUX HEAT RANGE terminals. Refer to Table 3 and the installation instructions for electric heaters for minimum airﬂow required for safe heater operation. Refer to table below for the available airﬂows. Each select pin is conﬁgured for a certain airﬂow. The airﬂow will be supplied in the Heating mode on air conditioners when electric heat is the primary heating source. The preset factory default selection is the highest airﬂow.

TERMINAL 1234

Available

Airﬂow (Cfm)

1365 1470 1680 1840

AC/HP SIZE (BLU) — The preset factory default selection for AC/HP SIZE (air conditioner/heat pump) is set to 400 cfm/ton. The selection pins are conﬁgured for 350 cfm/ ton and 400 cfm/ton.

TYPE (ORN) — The TYPE is a preset factory default selection. The preset factory default setting is AC for the 50SX units. Default setting should not be altered.

AC/HP CFM ADJUST (BLK) — The preset factory default selection is MED. Selections HI and LO will adjust the airﬂow supplied for all operational modes (see table below). The selection options allow installer to adjust airﬂow to meet such individual needs as noise and static compensation, etc.

MODE

FAN

ONLY

COOLING HEATING

LO - Adjust −15% −10% −10% HI - Adjust 15% 10% 10%

AC/HP TIME DELAY (GRY) — Four motor operation delay options are provided to customize system operation. See listing below:

OPTION DESCRIPTION 30-Sec On/60-Sec

Off Delay

Proﬁle (Terminal 1)

Used when it is desirable to allow system coils time to heat up or cool down prior to airﬂow.

No Delay Option

(Terminal 2)

Used for servicing or when other components are used to perform the delay function.

30-Sec Off Delay

(Terminal 3)

Preset factory default setting for 50SX units.

45-Sec Off Delay

(Terminal 4)

Enhances system efficiency.

UNIT CONTROLS — All compressors have the following internal-protection controls.

High-Pressure Relief Valve — This valve opens when the pressure differential between the low and high side becomes excessive.

Compressor Overload — This overload interrupts power to the compressor when either the current or internal temperature become excessive, and automatically resets when the internal temperature drops to a safe level.

This overload may require up to 60 minutes (or longer) to reset; therefore, if the internal overload is suspected of being open, disconnect the electrical power to the unit and check the circuit through the overload with an ohmmeter or continuity tester.

Page 35

SEQUENCE OF OPERATION — STD NON-ICM UNITS Cooling

NOTE: With the FAN switch in the ON position, 24 v is supplied to the IFR through the G terminal on the thermostat. This voltage energizes the coil of the contactor, closing the normally-open set of contacts which provide continuous power to the indoor (evaporator) fan motor (IFM). Moving the FAN switch back to the AUTO. position, providing there is not a call for cooling, deenergizes the IFR, opens the IFR contacts, and deenergizes the IFM. The F ANswitch in AUTO. position cycles upon a call for cooling.

On a call for cooling, 24 v is supplied to the compressor contactor (C) and IFR simultaneously through the Y and G terminals of the thermostat, respectively. On units with a compressor time delay relay, there is a built-in, 5-minute (± 45 seconds) delay between compressor starts. Energizing the contactor closes the normally-open set of contacts supplying power to both the compressor and outdoor (condenser) fan motor (OFM). Energizing the IFR closes the normally-open set of contacts providing power to the IFM. On the loss of the call for cooling, 24 v is removed from both the Y and G terminals of the thermostat (providing the FAN switch is in the AUTO. position), deenergizing both the contactor and IFR and opening both the contacts supplying power to compressor/OFM and IFM.

Heating — If accessory electric heaters are installed, on a call for heat, circuit R-W is made through the thermostat contacts. Circuit R-G is made which energizes the IFR. If the heaters are staged, then the thermostat closes a second set of contacts W2 when second stage is required. When thermostat is satisﬁed, contacts open, deenergizing the heater relay and the IFR.

SEQUENCE OF OPERATION — ICM UNITS Evaporator Fan — With the fan switch in the ON position,

24 v is supplied to the ICM motor through the ‘‘G’’ terminal on the thermostat. This voltage provides continuous power to the indoor (evaporator) fan motor (IFM). If the fan switch is moved back to the AUTO position and there is not a call for heating or cooling, 24 v is removed from the ‘‘G’’ terminal and the evaporator fan remains energized for the delay timing. When the fan switch is in AUTO, the fan cycles with either the call for heating or cooling.

Cooling — On a call for cooling, 24 v is supplied to the compressor contactor (C) and IFM simultaneously through the ‘‘Y’’ and ‘‘G’’ terminals of the thermostat. Energizing the contactor closes the normally open set of contacts supplying power to both the compressor and outdoor (condenser) fan motor (OFM). On the loss of the call for cooling, 24 v is removed from the ‘‘Y’’and ‘‘G’’terminals of the thermostat, deenergizing the compressor and OFM. The evaporator fan remains energized for the delay timing.

NOTE: Once the compressor has started and then stopped, it cannot be restarted again until 5 minutes have elapsed.

Heating — If accessory electric heaters are installed, on a call for heat, circuits R-W and R-G are made through the thermostat contacts, energizing the heater relay and IFM. If the heaters are staged, then the thermostat closes the second set of contacts, W2, when the second stage is required. When the thermostat is satisﬁed, contacts open, deenergizing the heater relay and the IFM.

Page 36

Table 8 — Dry Coil Air Delivery* — Horizontal Discharge (Deduct 10% for 208 v) — Unit 50SS

UNIT SIZE

MOTOR

SPEED

230 AND 460 V HORIZONTAL DISCHARGE

External Static Pressure (in. wg)

0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0

018

Low

Watts 230 225 220 210 195 170 ————— Cfm760745725695640540—————

High

Watts ————270235200———— Cfm————850700450————

024

Low

Watts 280 275 265 255 250 245 240 ———— Cfm820810755700660600560————

Med

Watts 365 360 350 345 340 330 320 310 300 — — Cfm 1025 1010 975 940 900 850 800 720 630 — —

High

Watts — — 490 480 470 460 445 430 410 390 380 Cfm — — 1300 1255 1200 1150 1080 1005 915 790 620

030

Low

Watts — 460 450 420 400 380 360 335 — — — Cfm — 1240 1190 1125 1060 995 920 840 — — —

Med

Watts — — — 480 460 435 410 375 — — — Cfm — — — 1280 1200 1115 1020 910 — — —

High

Watts —————560530510490460— Cfm—————1270 1180 1080 1000 870 —

036

Low

Watts 470 460 455 445 430 415 400 380 350 — — Cfm 1280 1250 1230 1200 1150 1100 1050 980 890 — —

Med

Watts 550 535 520 500 480 460 440 410 385 — — Cfm 1500 1450 1400 1330 1270 1190 1120 1030 940 — —

High

Watts ————625595550520500470425 Cfm————1540 1440 1325 1220 1110 1000 800

042

Low

Watts 730 700 680 645 615 580 535 490 430 — — Cfm 1620 1590 1550 1510 1460 1390 1310 1210 1050 — —

High

Watts —————850800750700650610 Cfm—————1780 1670 1550 1400 1230 1050

048

Low

Watts 1080 1040 1020 970 910 840 785 730 680 620 540 Cfm 2100 2090 2080 2060 1980 1900 1810 1710 1590 1450 1200

High

Watts 1230 1190 1125 1060 1010 940 880 820 760 710 660 Cfm 2390 2340 2280 2210 2150 2030 1900 1770 1630 1480 1300

060

Low

Watts 1150 1100 1050 1010 950 900 850 800 730 650 — Cfm 2500 2410 2330 2260 2170 2080 1990 1880 1750 1580 —

High

Watts —————117011101050 990 920 880 Cfm—————2470 2340 2200 2040 1870 1700

*Air delivery values are based on operating voltage of 230 v or

460 v, dry coil, without ﬁlter or electric heater. Deduct wet coil, ﬁlter, and electric heater pressure drops to obtain external 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.

Page 37

Table 9 — Dry Coil Air Delivery* — Vertical Discharge (Deduct 10% for 208 v) — Unit 50SS

UNIT SIZE

MOTOR

SPEED

230 AND 460 V VERTICAL DISCHARGE

External Static Pressure (in. wg)

0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0

018

Low

Watts 230 225 220 210 195 170 —————

Cfm760745725695640540—————

High

Watts ————270235200————

Cfm————850700450————

024

Low

Watts 280 275 265 255 250 245 240 ————

Cfm820810755700660600560————

Med

Watts 365 360 350 345 340 330 320 310 300 — —

Cfm 1025 1010 975 940 900 850 800 720 630 — —

High

Watts — — 490 480 470 460 445 430 410 390 380

Cfm — — 1300 1255 1200 1150 1080 1005 915 790 620

030

Low

Watts — 460 450 420 400 380 360 335 — — —

Cfm — 1240 1190 1125 1060 995 920 840 — — —

Med

Watts — — — 480 460 435 410 375 — — —

Cfm — — — 1280 1200 1115 1020 910 — — —

High

Watts —————560530510490460—

Cfm—————1270 1180 1080 1000 870 —

036

Low

Watts 470 460 455 445 430 415 400 380 350 — —

Cfm 1280 1250 1230 1200 1150 1100 1050 980 890 — —

Med

Watts 550 535 520 500 480 460 440 410 385 — —

Cfm 1500 1450 1400 1330 1270 1190 1120 1030 940 — —

High

Watts ————625595550520500470425

Cfm————1540 1440 1325 1220 1110 1000 800

042

Low

Watts 730 700 680 645 615 580 535 490 430 — —

Cfm 1620 1590 1550 1510 1460 1390 1310 1210 1050 — —

High

Watts —————850800750700650610

Cfm—————1780 1670 1550 1400 1230 1050

048

Low

Watts 1080 1040 1020 970 910 840 785 730 680 620 540

Cfm 2100 2090 2080 2060 1980 1900 1810 1710 1590 1450 1200

High

Watts 1230 1190 1125 1060 1010 940 880 820 760 710 660

Cfm 2390 2340 2280 2210 2150 2030 1900 1770 1630 1480 1300

060

Low

Watts 890 850 810 780 740 710 660 630 580 — —

Cfm 2500 2410 2330 2260 2170 2080 1970 1860 1700 — —

High

Watts — — — 1000 960 910 870 830 790 750 —

Cfm — — — 2480 2370 2250 2120 2000 1850 1690 —

Table 10 — Dry-Coil Air Delivery* — Horizontal Discharge (Deduct 10% for 208 V) — Unit 50SX

UNIT

50SX

MOTOR

SPEED

AIR

DELIVERY

230 AND 460 VOLT HORIZONTAL DISCHARGE

External Static Pressure (in. wg)

0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0

024, 030

Low

Watts 280 275 265 255 250 245 240 ———— Cfm 820810755700660600560————

Med

Watts 365 360 350 345 340 330 320 310 300 — — Cfm 1025 1010 975 940 900 850 800 720 630 — —

High

Watts — — 490 480 470 460 445 430 410 390 380 Cfm — — 1300 1255 1200 1150 1080 1005 915 790 620

036

Low

Watts 520 495 474 458 445 425 ————— Cfm 1375 1335 1290 1240 1200 1140 —————

Med

Watts 575 560 535 510 480 460 440 425 — — — Cfm 1520 1490 1450 1400 1380 1300 1200 1080 — — —

High

Watts ————650614575540510480— Cfm ————1560 1500 1380 1280 1170 1060 —

042

Low

Watts 490 480 470 460 450 430 410 390 — — — Cfm 1400 1380 1340 1300 1250 1200 1140 1070 — — —

Med

Watts 590 580 560 545 525 505 480 450 420 — — Cfm 1600 1560 1540 1470 1430 1360 1300 1220 1120 — —

High

Watts —————700670640600560500 Cfm —————1780 1670 1600 1480 1340 1100

048†

Low

Watts 1050 1000 970 930 870 810 750 680 600 — — Cfm 1850 1830 1800 1785 1750 1700 1640 1500 1330 — —

High

Watts — — — 1050 1000 930 870 810 740 665 — Cfm — — — 2000 1940 1850 1750 1635 1500 1300 —

LEGEND AND NOTES FOR TABLES 9 AND 10 *Air delivery values are based on operating voltage of 230 v or

460 v, dry coil, without ﬁlter or electric heater. Deduct wet coil, ﬁlter, and electric heater pressure drops to obtain external static pressure available for ducting.

†Size 048 is 460 v.

NOTES:

1. Do not operate the unit at a cooling airﬂow that is less than 350cfmforeach 12,000 Btuh of rated cooling capacity.Evaporatorcoil frosting may occur at airﬂows below this point.

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

Page 38

Table 11 — Dry-Coil Air Delivery* — Vertical Discharge (Deduct 10% for 208 V) — Unit 50SX

UNIT SIZE

50SX

MOTOR

SPEED

AIR

DELIVERY

230 AND 460 VOLT VERTICAL DISCHARGE

External Static Pressure (in. wg)

0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0

024, 030

Low

Watts 280 275 265 255 250 245 240 ————

Cfm 820810755700660600560————

Med

Watts 365 360 350 345 340 330 320 310 300 — —

Cfm 1025 1010 975 940 900 850 800 720 630 — —

High

Watts — — 490 480 470 460 445 430 410 390 380

Cfm — — 1300 1255 1200 1150 1080 1005 915 790 620

036

Low

Watts 520 495 474 458 445 425 —————

Cfm 1375 1335 1290 1240 1200 1140 —————

Med

Watts 575 560 535 510 480 460 440 425 — — —

Cfm 1520 1490 1450 1400 1380 1300 1200 1080 — — —

High

Watts ————650614575540510480—

Cfm ————1560 1500 1380 1280 1170 1060 —

042

Low

Watts 490 480 470 460 450 430 410 390 — — —

Cfm 1400 1380 1340 1300 1250 1200 1140 1070 — — —

Med

Watts 590 580 560 545 525 505 480 450 420 — —

Cfm 1600 1560 1540 1470 1430 1360 1300 1220 1120 — —

High

Watts —————700670640600560500

Cfm —————1780 1670 1600 1480 1340 1100

048†

Low

Watts 1050 1000 970 930 870 810 750 680 600 — —

Cfm 1850 1830 1800 1785 1750 1700 1640 1500 1330 — —

High

Watts — — — 1050 1000 930 870 810 740 665 —

Cfm — — — 2000 1940 1850 1750 1635 1500 1300 —

*Air delivery values are based on operating voltage of 230 v or

460 v, dry coil, without ﬁlter or electric heater. Deduct wet coil, ﬁlter, and electric heater pressure drops to obtain external static pressure available for ducting.

†Size 048 is 460 v.

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.

Table 12 — Dry-Coil Air Delivery* — Fan Only and

Cooling; Horizontal and Vertical Discharge for

Integrated Control Motor Units at 230 V

(Deduct 10% from Cfm for 208-V Operation)

UNIT 50SX FAN ONLY

(Cfm)

COOLING

(Cfm)

048 1400 1600 060 1750 2000

*Air delivery values are for dry coil at 230 v.Airﬂow is independent of

external static pressure within 65% of table values up to

0.8 in. wg.

NOTE: Do not operate the unit at a cooling airﬂow that is less than 350 cfm for each 12,000 Btuh of rated cooling capacity. Evaporatorcoil icing may occur at airﬂows below this point. Water blow-off may occur at airﬂows above 450 cfm per 12,000 Btuh of rated cooling capacity.

Page 39

Table 13 — Wet Coil Pressure Drop

UNIT SIZE

AIRFLOW

(cfm)

PRESSURE DROP

(in. wg)

018*

600 0.069 700 0.082 800 0.102 900 0.116

024

600 0.039 700 0.058 800 0.075 900 0.088

030

900 0.088 1000 0.095 1200 0.123

036

1000 0.068 1200 0.088 1400 0.108 1600 0.123

042

1000 0.048 1200 0.069 1400 0.088 1600 0.102

048

1400 0.068 1600 0.075 1800 0.088

060

1700 0.082 1900 0.095 2100 0.108 2300 0.123

*Unit 50SS only.

Table 14 — Accessory Electric Heater Pressure Drop (in. wg)

HEATER

CFM

600 800 1000 1200 1400 1600 1800 2000 2200

5-20 0.030 0.033 0.037 0.042 0.047 0.052 0.060 0.067 0.075

Table 15 — Filter Pressure Drop (in. wg)

UNIT SIZE

50SS

FILTER

SIZE

(in.)

CFM

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

018, 024 20 x 20 0.05 0.07 0.08 0.10 0.12 0.13 — ———————————— 030, 036 20x24—————0.10 0.11 0.13 0.14 ——————————

042 24x24—————— — —0.110.12 0.14 0.15 ———————

048, 060 24x30—————— — — — —0.09 0.10 0.11 0.12 0.13 0.14 0.15 0.17 0.18

UNIT

SIZE

50SX

FILTER

SIZE

(in.)

CFM

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

024-036 24 x 24 — — 0.06 0.06 0.07 0.07 0.08 0.09 0.10 —————————— 042-060 24 x 30 — — — — — — — — 0.08 0.09 0.09 0.10 0.11 0.12 0.13 0.14 0.15 0.17 0.18

Page 40

MAINTENANCE

To ensure continuing high performance, and to minimize the possibility of premature equipment failure, periodic maintenance must be performed on this equipment. This cooling unit should be inspected at least once each year by a qualiﬁed service person. Totroubleshoot cooling of units, refer to Troubleshooting chart in back of book.

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 SERIOUS PERSONAL INJURY AND POSSIBLE DAMAGE TO THIS EQUIPMENT.

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 and check

lubrication each cooling season. Clean and lubricate (if required) when necessary. For ﬁrst heating season, inspect blower wheel bimonthly to determine proper cleaning frequency.

4. Check electrical connections for tightness and controls

for proper operation each cooling season. Service when necessary.

Failure to follow these warnings could result in serious personal injury:

1. Turn off electrical power to the unit before performing any maintenance or service on the 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.

Air Filter

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 1 and 2 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.

Replace ﬁlters with the same dimensional size and type as originally provided, when necessary.

Unit Top Removal

NOTE: When performing maintenance or service procedures that require removal of the unit top, be sure to

perform all of the routine maintenance procedures that require top removal, including coil inspection and cleaning, and condensate drain pan inspection and cleaning.

Only qualiﬁed service personnel should perform maintenance and service procedures that require unit top removal. Refer to the following top removal procedures:

1. Remove 7 screws on unit top cover surface. (Save all screws.)

2. Remove 4 screws on unit top cover ﬂange. (Save all screws.)

3. Lift top from unit carefully. Set top on edge and make

sure that top is supported by unit side that is opposite duct (or plenum) side.

4. Carefully replace and secure unit top to unit, using screws

removed in Steps 1 and 2, when maintenance and/or service procedures are completed.

Evaporator Blower and Motor

NOTE: Motors without oilers 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.

Lubricate the motor every 5 years if the motor is used intermittently (thermostat FAN switch in AUTO. position), or every 2 years if the motor is used continuously (thermostat FAN switch in ON position).

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.

To clean and lubricate the blower motor and wheel:

1. Remove and disassemble blower assembly as follows:

a. Remove blower access door. b. For standard non-ICM units, disconnect motor lead from

IFR. Disconnect yellow motor lead from terminal L2 of the contactor.

c. Remove blower assembly from all units. Be careful

not to tear insulation in blower compartment.

d. Ensure proper reassembly by marking blower wheel

and motor in relation to blower housing before disassembly.

e. Loosen setscrew(s) which secure wheel to motor shaft.

Remove screws that secure motor mount brackets to housing and slide motor and motor mount out of housing.

2. Lubricate motor as follows:

a. Thoroughly clean all accumulations of dirt or grease

from motor housing.

b. Remove dust caps or plugs from oil ports located at

each end of motor.

c. Use a good grade of SAE 20 nondetergent motor oil

and put one teaspoon (

⁄16oz. or 16 to 25 drops) in

each oil port.

d. Allow time for oil to be absorbed by each bearing,

then wipe excess oil from motor housing.

e. Replace dust caps or plugs in oil ports.

3. Remove and clean blower wheel as follows:

a. Ensure proper reassembly by marking wheel orienta-

tion and cutoff plate location.

b. Remove screws holding cut-off plate, and remove plate

from housing.

Page 41

c. Lift wheel from housing. When handling and/or clean-

ing blower wheel, be sure not to disturb balance weights (clips) on blower wheel vanes.

d. Remove caked-on dirt from wheel and housing with a

brush. Remove lint and/or dirt accumulations from wheel and housing with vacuum cleaner, using soft brush at-

tachment. Remove grease and oil with mild solvent. e. Reassemble wheel and cut-off plate into housing. f. Reassemble motor into housing. Be sure setscrews are

tightened on motor-shaft ﬂats and not on round part of shaft.

Condenser Coil, Evaporator Coil, and Condensate Drain Pan —

Inspect the condenser coil, evaporator coil, and condensate drain pan at least once each year. Proper inspection and cleaning requires the removal of the unit top. See Unit Top Removal section on page 40.

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 a 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 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 tube with clear water. Do not splash water on the insulation, motor, wiring, or air ﬁlter(s). If the drain tube is restricted, clear it with a ‘‘plumbers snake’’or similar probe device. Ensure that the auxiliary drain port above the drain tube is also clear.

Condenser Fan

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. Remove 2 screws at bottom of condenser air intake grille

and remove plastic grille.

2. Inspect the fan blades for cracks or bends.

3. If fan needs to be removed, loosen the setscrew and slide

the fan off the motor shaft.

4. When replacing fan blade, position blade so that lead-

ing edge is 2 in. back from condenser inlet grille or

⁄2in. maximum from fan deck. See Fig. 35.

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

shaft when tightening.

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 the control/blower and compressor compartment access panels 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 Cooling Sequence of Operation section on page 35, as an aid in determining proper control operation.

RefrigerantCircuit — Inspect all refrigerant tubing con-

nections and the unit base for oil accumulations annually. Detecting oil generally indicates a refrigerant leak.

If oil is detected or if low cooling performance is suspected, leak-test all refrigerant tubing using an electronic leakdetector, or liquid-soap solution. If a refrigerant leak is detected, refer to Check for Refrigerant Leaks section on page 27.

If no refrigerant leaks are found and low cooling performance is suspected, refer to Checking and Adjusting Refrigerant Charge section on page 27.

Evaporator Airﬂow — The cooling airﬂow does not

require checking unless improper performance is suspected.

If a problem exists, be sure that all supply- and return-air grilles are open and free from obstructions, and that the air ﬁlter is clean. When necessary, refer to Indoor Airﬂow and

AirﬂowAdjustments section on page 34 to check the system airﬂow.

Metering Devices — Refrigerant metering devices are

ﬁxed oriﬁces and are located in the inlet header to the evaporator coil.

Liquid Line Strainer — The liquid line strainer

(to protect metering device) is made of wire mesh and is located in the liquid line on the inlet side of the metering device.

Fig. 35 — Fan Blade Clearance

Page 42

TROUBLESHOOTING COOLING CHART

SYMPTOM CAUSE REMEDY

Compressor and condenser fan will not start.

Power failure Call power company. Fuse blown or circuit breaker tripped Replace fuse or reset circuit breaker. Defective thermostat, contactor, transformer,

or control relay

Replace component.

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. Single-phase units with scroll compressor

(50SS048,060 and 50SX) have a 5-minute time delay

DO NOT bypass this compressor time delay — wait for 5 minutes until time-delay relay is deenergized.

Compressor will not start but condenser fan runs.

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/start capacitor, overload, or start relay

Determine cause and replace.

One leg of 3-phase power dead Replace fuse or reset circuit breaker.

Determine cause.

Three-phase scroll compressor (50SS048, 060; 50SX036-060 units only) makes excessive noise, and there may be a low pressure differential.

Scroll compressor is rotating in the wrong direction

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

Compressor cycles (other than normally satisfying thermostat).

Refrigerant overcharge or undercharge Reclaim refrigerant, evacuate system, and recharge

to capacities shown on nameplate. Defective compressor Replace and determine cause. Insufficient line voltage Determine cause and correct. Blocked condenser Determine cause and correct. Defective run/start capacitor, overload

or start relay

Determine cause and replace. Defective thermostat Replace thermostat.

Faulty condenser-fan motor or capacitor Replace. Restriction in refrigerant system Locate restriction and remove.

Compressor operates continuously.

Dirty air ﬁlter Replace ﬁlter. Unit undersized for load Decrease load or increase unit size. Thermostat set too low Reset thermostat. Low refrigerant charge Locate leak, repair and recharge. Leaking valves in compressor Replace compressor. Air in system Reclaim refrigerant, evacuate system and recharge. Condenser coil dirty or restricted Clean coil or remove restriction.

Excessive head pressure.

Dirty air ﬁlter Replace ﬁlter. Dirty condenser coil Clean coil. Refrigerant overcharged Reclaim excess refrigerant. Air in system Reclaim refrigerant, evacuate system and recharge. Condenser air restricted or air short-cycling Determine cause and correct.

Head pressure too low. Low refrigerant charge Check for leaks, repair and recharge.

Compressor valves leaking Replace compressor. Restriction in liquid tube Remove restriction.

Excessive suction pressure.

High heat load Check for source and eliminate. Compressor valves leaking Replace compressor. Refrigerant overcharged Reclaim excess refrigerant.

Suction pressure too low.

Dirty air ﬁlter Replace ﬁlter. Low refrigerant charge Check for leaks, repair and recharge. Metering device or low side restricted Remove source of restriction. Insufficient evaporator airﬂow Increase air quantity. Check ﬁlter — replace if

necessary. Temperature too low in conditioned area Reset thermostat. Outdoor ambient below 40 F Install low-ambient kit. Field-installed ﬁlter-drier restricted Replace.

Page 43

TROUBLESHOOTING COOLING CHART (cont)

SYMPTOM CAUSE REMEDY

Integrated control motor (units 50SX048 208/230 v and 50SX060) IFM does not run.

Blower wheel not secured to shaft. Properly tighten blower wheel to shaft. Insufficient voltage at motor Determine cause and correct. Power connectors not properly seated Connectors should snap easily; do not force.

Integrated control motor (units 50SX048 208/230 v and 50SX060) IFM runs when it should be off.

Motor programmed with a delay proﬁle Allow a few minutes for motor to shut off. With thermostat in OFF the voltage on

G,Y1,Y/Y2,W with respect to common, should be less than

⁄2of actual low

voltage supply

If measured voltage is more than

⁄2, the thermostat is incompatible with motor. If voltage is less than

⁄2, the motor has failed.

Integrated control motor (units 50SX048 208/230 v and 50SX060) IFM operation is intermittent.

Water dripping into motor Verify proper drip loops in connector wires. Connectors not ﬁrmly seated Gently pull wires individually to be sure they

are crimped into the housing.

IFM — Indoor (Evaporator) Fan Motor

Page 44

Page 45

Page 46

PACKAGED SERVICE TRAINING

Our packaged service training programs provide an excellent way to increase your knowledge of the equipment discussed in this manual. Product programs cover:

• Unit Familiarization

• Installation Overview

• Maintenance

• Operating Sequence

A large selection of product, theory, and skills programs is available. All programs include a video cassette and/or slides and a companion booklet. Use these for self teaching or to conduct full training sessions.

For a free Service Training Material Catalog (STM), call 1-800-962-9212. Ordering instructions are included.

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

Book 1 4 Tab 1b 6b

PC 111 Catalog No. 535-022 Printed in U.S.A. Form 50SS,SX-4SI Pg 46 5-95 Replaces: 50SS,SX-3SI

Page 47

Page 48

START-UP CHECKLIST

(Remove and Store in Job File)

I. PRELIMINARY INFORMATION

MODEL NO.: DATE:

SERIAL NO.: TECHNICIAN:

II. PRE-START-UP (insert checkmark in box as each item is completed)

M VERIFY THAT ALL PACKING MATERIALS HAVE BEEN REMOVED FROM UNIT M REMOVE ALL SHIPPING HOLDDOWN BOLTS AND BRACKETS PER INSTALLATION INSTRUCTIONS M VERIFY THAT CONDENSATE CONNECTION IS INSTALLED PER INSTALLATION INSTRUCTIONS M CHECK ALL ELECTRICAL CONNECTIONS AND TERMINALS FOR TIGHTNESS M CHECK THAT INDOOR AIR FILTER IS CLEAN AND IN PLACE M VERIFY THAT UNIT INSTALLATION IS LEVEL M CHECK FAN WHEEL AND PROPELLER FOR LOCATION IN HOUSING/ORIFICE AND SETSCREW

TIGHTNESS

III. START-UP

ELECTRICAL

SUPPLY VOLTAGE L1-L2

L2-L3 L3-L1 COMPRESSOR AMPS L1 L2 L3 INDOOR FAN AMPS

TEMPERATURES

OUTDOOR-AIR TEMPERATURE

RETURN-AIR TEMPERATURE

DB WB

COOLING SUPPLY AIR

PRESSURES

REFRIGERANT SUCTION

PSIG REFRIGERANT DISCHARGE

PSIG M VERIFY THAT 3-PHASE SCROLL COMPRESSOR (50SS048,060; 50SX036-060 UNITS ONLY) IS ROTATING

IN CORRECT DIRECTION

M VERIFY REFRIGERANT CHARGE USING CHARGING CHARTS ON PAGES 28-33.

----------------------------------------------------------------------------------------

CUT ALONG DOTTED LINE

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

Book 1 4 Tab 1b 6b

PC 111 Catalog No. 535-022 Printed in U.S.A. Form 50SS,SX-4SI Pg CL-1 5-95 Replaces: 50SS,SX-3SI

Carrier 50SX024-060, 50SS018, 50SS024, 50SS030, 50SS036 Installation, Start-up And Service Instructions Manual

Specifications and Main Features

Frequently Asked Questions

User Manual