Carrier 48SX024-048 User Manual

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Page 1

Packaged Gas Heating/

Electric Cooling Units

Installation, Start-Up and

48SS018-060 48SX024-048

COMMERCIAL

UNITARY

SYSTEMS

Service Instructions

SAFETY CONSIDERATIONS ...........................

General RECEIVING AND INSTALLATION

Step 1 — Check Equipment

• IDENTIFY UNIT

• INSPECT SHIPMENT

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

• ROOF CURB

• SLAB MOUNT

• FLUSH MOUNT

Step 3 — Field Fabricate Ductwork ....

Step 4 ~ Provide Clearances...........................

Step 5 — Rig and Place Unit

• UNITS WITHOUT BASE RAIL

• UNITS WITH OPTIONAL BASE RAIL

Step 6 — Connect Condensate Drain ...

Step 7 — Install Flue Hood..............................

Step 8 — Install Gas Piping ............................

Step 9 - Install Duct Connections

• CONFIGURING UNITS FOR DOWNFLOW

Step 10 — Install Electrical Connections .

• HIGH-VOLTAGE CONNECTIONS

• SPECIAL PROCEDURES FOR 208-V

• CONTROL VOLTAGE CONNECTIONS

• HEAT ANTICIPATOR SETTING

• TRANSFORMER PROTECTION

PRE-START-UP START-UP . . MAINTENANCE START-UP CHECKLIST

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

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

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

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

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

(VERTICAL) DISCHARGE

OPERATION

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

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

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

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

Page

. 1-9

.. 1

10-20

. , 10

10 10

13 13 13 16

. . 21

21-38 39-44

. CL-1

Fig. 1 — Typical 48SS Unit Shown

Follow all safety codes. Wear safety glasses and work gloves. Use quenching cloth for unbrazing operations. Have fire extinguisher available for all brazing operations.

A WARNING

Improper installation, adjustment, alteration, service, maintenance, or use can cause carbon monoxide poi soning, fire, or an explosion which can result in personal injury or unit damage. Consult a qualified installer, service agency, or gas supplier for informa tion or assistance. The qualified installer or agency must use only factory-authorized kits or accessories when mod ifying this product.

NOTE TO INSTALLER — Before the installation, READ THESE INSTRUCTIONS CAREFULLY AND COM PLETELY. Also, make sure the User’s Manual and Replacement Guide are left with the unit after installation*

Before performing service or maintenance operations on unit, turn off gas supply then unit main power switch. Electrical shock could cause personal injury.

A WARNING

SAFETY CONSIDERATIONS

Installation and servicing of air-conditioning equipment can be hazardous due to system pressure and electrical com ponents. Only trained and qualified personnel should install, repair, or service air-conditioning equipment.

Untrained personnel can perform basic maintenance func tions 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.

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

Book|1 |4 PC 111 Catalog No 534-842 Printed in U S A Form 48SS,SX-2SI Pg 1 5-94 Replaces: 48SS,SX-1 SI Tab la 6a

General — The 48SS,SX units (see Fig. 1) are fully self-

contained, combination gas heating/electric cooling units designed for outdoor installation. See Fig. 2-9 for unit di mensions. All unit sizes have discharge openings for both horizontal and downflow configurations, and are factory shipped with all 4 duct openings covered. Units may be in stalled either on a rooftop or a ground-level cement slab. See Fig. 10 for roof curb dimensions.

Page 2

REQ’D CLEARANCES FOR SERVICING In. (mm) Duct panel

Unit top Side opposite ducts Compressor access (Except for NEC requirements)

REQ’D CLEARANCES TO COMBUSTIBLE MAIL in (mm)

Maximum extension of overhangs ... 48 (1219) Unit top . 14 (356) Duct side of unit 0 Side opposite ducts 9 (229) Bottom of unit ... 0 Flue panel . . .30 (762)

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

36 (914) 36 (914) 36 (914)

NEC REQ’D 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)

Í n/16' (43.2)

-17 1/16'-

I (433 9) LOPTIONAL SUPPLY

CG - Center of Gravity MATL - Material

LEGEND

COND — Condenser NEC — National Electrical Code LV — Low Voltage REQ’D - Required

NOTE; Clearances must be maintained to prevent recirculation of air from outdoor-fan discharge

AIR OPENING

OPTIONAL RETURN AIR OPENING

3/16

(46 2)

7/8* (22.2) OIA CONTROL ENTRY \

UNIT

48SS180040 48SS024040 48SS024080 48SS030040 48SS030060/080 48SS036060/080 48SS036100/120 48SS042060/080 48SS042100/120

UNIT

48SS018040 48SS024040 48SS024060 48SS030040 48SS030060/080 48SS036060/080 48SS036100/120 48SS042060/080 48SS042100/120

1 1/0' C20 6) OIA. POWER ENTRY

1 5/8' (41 3) DIA

GAS ENTRY

1/2' - 14 NPT

GAS CONNECTION

ELECTRICAL

CHARACTERISTICS

In./mm

163/16/420 7

203/16/522.3

0 7/0' (22.23)

ALTERNATE LV ENTRY

EVAP COIL ACCESS

LEFT SIDE VIEW

FLUE PANEL

FLUE HOOD

2 5/16^

(58.0)

UNIT WEIGHT

lb kg

208/230-1-60

272

123 208/230-1-60 303 138 208/230-1-60 315 208/230-1-60 320 208/230-1-60 208/230-1-60

324 147 94/43 336 153

143 100/45

145 100/45

A B

81/37 62/28 76/35 97/44

86/39 76/35 111/50 63/29 208/230-1-60 348 158 89/40 208/230-1-60 375 170 208/230-1-60 387 176

In./mm

18's/i6/481.0

CENTER OF GRAVITY In./mm

X Y Z

25 07/637 27 07/688

26.98/685

26.71/678 27 15/689

20 59/523

23.35/593 23 27/591 23 46/596

22.36/568

10 85/276

95/43 86/39 119/54 75/34

98/45 89/40 122/55 78/35

27.50/698 22.48/571 27 40/696 22 44/570

22'5/ie/582.6

27.01/686 22 44/570

26.94/684

22 44/570

12 7/321

1 1/4' (31.75)

^ALTERNATE POWER ENTRY

2 3/16

(55 6)

CORNER WEIGHT

(Ib/kg)

C D

53/24

43/20

123/56

40/18 46/21 126/57 43/20 47/21 126/57 47/21

63/29 115/52 52/24

79/36 114/52 66/30

COMPRESSOR ACCESS PANEL

UNIT HEIGHT

(in./mm)

24 1/613 24 1/613

24.1/613 24 1/613 24 1/613

24.1/613 24 1/613

28.1/714 28 1/714

Fig. 2 - 48SS018-042 Without Base Rail, Unit Dimensions

Page 3

REQ’D CLEARANCES FOR SERVICING, in (mm) Duct panel

Unit top Side opposite ducts Compressor access ... (Except for NEC requirements)

REQ’D CLEARANCES TO COMBUSTIBLE MATL in (mm) Maximum extension of overhangs

Unit top . .

Duct side of unit . ...

Side opposite ducts . . Bottom of unit Flue panel

48 (1219)

NEC REQ’D CLEARANCES in (mm) Between units, control box side

Unit and ungrounded surfaces, control box side Unit and block or concrete walls and other grounded surfaces, control box side

42 (1067)

36 (914)

42 (1067)

. . 0 36 (914) 36 (914) 36 (914)

14 (356)

. 0

9 (229)

. . .0

30 (762)

52 49 9/16'

(1320.8) (1259 3)

-45 1/2'

OPTIONAL SUPPLY AIR OPENING

OPTIONAL RETURN

AIR OPENING

^1 13/16'

(46 2)

7/8' (22.2) OIA CONTROL ENTRY

I 5/8' (41 3) DIA GAS ENTRY 1/2' - 14 NPT GAS CONNECTION

REAR VIEW

UNIT

ELECTRICAL

CHARACTERISTICS

48SS018040 208/230-1-60 48SS024040 208/230-1-60 48SS024060 208/230-1-60 48SS030040 208/230-1-60, 208/230-3-60 48SS030060/080 208/230-1-60, 208/230-3-60 48SS036060/080 208/230-1-60, 208/230-3-60, 460-3-60, 575-3-60 48SS036100/120 208/230-1-60, 208/230-3-60, 460-3-60, 575-3-60 48SS042060/080

208/230-1-60, 208/230-3-60, 460-3-60 399 181 101/46 92/42

48SS042100/120 208/230-1-60, 208/230-3-60, 460-3-60 411

UNIT

48SS018040

in./mmGin./mm

CENTER OF GRAVITY in./mm

Y Z

25 04/636 22 72/577

48SS024040 26 90/683 3 20 17/512 3 48SS024060 26 82/681 2 20.22/513 6 48SS030040 48SS030060/080 48SS036060/080

19%/504.8 22W565 4

26 57/674.9 20.1/509.3 26 93/684

21 1/535.4

27.31/693 7 21 0/532 6

13 16/334 3

48SS036100/120 27 23/691 6 21 0/533 1 48SS042060/080 48SS042100/120

23%/606 4 26V4/666 8

26 87/682 5 21 0/533 1

26.81/681 21 0/533 7

14 96/380

UNIT WEIGHT

296 135 327

149 103/47 49/22

339 155

106/48 52/24

CORNER WEIGHT

A B

87/40 68/31

344 157 106/48 53/24 356

162

102/46 71/32 360 164 92/42 82/37 372

169 95/43 85/39

187 104/47

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

NOTE: Clearances must be maintained to prevent recirculation of air from outdoor-fan discharge

95/43

(Ib/kg)

C D E

82/37 59/27 129/59 46/21 27 4/697 132/60 49/22 27 4/697 132/60 53/24 27 4/697 123/56 60/27 27 4/697 117/53

69/31 27.4/697 120/55 72/33 125/57

81/37 128/58 84/38 31.4/798

LEGEND

UNIT HEIGHT

(in./mm)

27.4/697

27 4/697 31 4/798

Fig. 3 — 48SS018-042 With Optional Base Rail Unit Dimensions

Page 4

o 7/8 (22.23)

ALTERNATE LV ENTRY

1 1/4 (31.75)

ALTERNATE POWER ENTRY

5/8 -

(16 S)

BLOWER ACCESS -

PANEL

COMPRESSOR ACCESS PANEL

RIGHT SIDE VIEW

1 13/16'

(46.2)

OPTIONAL SUPPLY AIR OPENING

-4 3/4'

(120 6)

12l5/1215/16

(312.7)

BURNER AND CONTROL BOX

ACCESS PANEL

REQ’D CLEARANCES FOR SERVICING, in. (mm) Duct panel . .

Unit top . Side opposite ducts Compressor access (Except for NEC requirements)

. . 0 36 (914) 36 (914) 36 (914)

REQ’D CLEARANCES TO COMBUSTIBLE MAIL in (mm) Maximum extension of overhangs . . 48(1219)

Unit top. ... ... 14(356)

Duct side of unit ... .0

Side opposite ducts .... 9 (229)

Bottom of unit Flue panel 30 (762)

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

. . 0

NEC REQ’D 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)

y-2 3/16' ^3/4' NPT (19.0)

(55 6) DRAIN OUTLET

FRONT VIEW

UNIT

ELECTRICAL

CHARACTERISTICS

UNIT WEIGHT

48SS048080 208/230-1-60 414 188 48SS048100/120/140

208/230-1-60

426

193

48SS060080 208/230-1-60 453 206 48SS060100/120/140 208/230-1-60 465

UNIT

48SS048080 48SS048100/120/140 48SS060080 28.36/720 48SS060100/120/140

CENTER OF GRAVITY (In./mm)

28 76/731

28.42/722

23 46/596

23.42/595 23 27/591

27 95/710

23 23/590

211

15 35/390

15.35/390

15.35/390 15 35/390

Fig. 4 — 4888048,060 Without Base Rail, Unit Dimensions

CORNER WEIGHT

(Ib/kg)

B C D

83/38 158/72

107/49

86/39 159/72 71/32

110/50

93/42

117/53

96/44

120/55

66/30

167/76 76/35 167/76 82/37

LEGEND

CG — Center of Gravity MAT’L COND — Condenser NEC LV — Low Voltage REQ'D

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

— Material — National Electrical Code — Required

Page 5

o 15/16^ 1 9/16' (23.8)„ (39.7)¿ B.

-45 1/2

ALTERNATE POWER ENTRY

1 1/4'

C31.75)

OPTIONAL RETURN

AIR OPENING

52 49 9/16"

(1320.0) (1259.3)

13/16

(46 2)

OPTIONAL SUPPLY AIR OPENING

REQ'D CLEARANCES FOR SERVICING, in. (mm) Duct panel

Unit top Side opposite ducts Compressor access (Except for NEC requirements)

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

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

36 (914) 36 (914) 36 (914)

REQ’D CLEARANCES TO COMBUSTIBLE MAIL in (mm) Maximum extension of overhangs

Unit top

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

Duct side of unit ... ... 0

Side opposite ducts . ... 9 (229)

Bottom of unit ... ... 0

Flue panel ... 30 (762)

. . .14 (356)

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

48 (1219)

NEC REQ’D CLEARANCES in (mm) Between units, control box side

Unit and ungrounded surfaces, control box side 36 (914) Unit and block or concrete walls and other grounded surfaces, control box.side . . 42 (1067)

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

42 (1067)

UNIT

48SS048080

48SS048100/120/140

48SS060080 48SS060100/120/140

UNIT

48SS048080 48SS048100/120/140 48SS060080 48SS060100/120/140

COMPRESSOR ACCESS PANEL

208/230-1-60, 208/230-3-60, 460-3-60, 575-3-60 438 199 113/51 89/40 164/75 72/33 208/230-1-60, 208/230-3-60, 460-3-60, 575-3-60 208/230-1-60, 208/230-3-60, 460-3-60, 575-3-60 208/230-1-60, 208/230-3-60, 460-3-60, 575-3-60

CENTER OF GRAVITY (in./mm)

28.54/724 9 20 00/508

28.22/716 8

28.18/715.6 27 79/705.9

ELECTRICAL

CHARACTERISTICS

Y Z

17.66/448 6

20.05/509 3

20.19/512.8

17 66/448.6

17.66/448 6

20.23/513.8 17 66/448 6

UNIT WEIGHT

lb kg

450 205 477 217 489

CG — Center of Gravity COND — Condenser LV — Low Voltage

222 126/57 102/46 173/79 88/40

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

CORNER WEIGHT

(Ib/kg)

A B C D

116/53

92/42 165/75

123/56 99/45 173/79

LEGEND

MAT’L — Material NEC — National Electrical Code REQ'D — Required

77/35 82/37

Fig. 5 - 4888048,060 With Optional Base Rail, Unit Dimensions

Page 6

8 l/4'-<

(203.6)

OPTIONAL SUPPLY AIR OPENING

-4 13/16

(122,2)

„

12 5/16

(312 7)

OPTIONAL RETURN AIR OPENING

13/16'

(46 2)

1 1/4' 01.0) DIA

ALTERNATE POWER ENTRY

LEFT SIDE VIEW

REQ’D CLEARANCES FOR SERVICING in. (mm) Duct panel .0

Unit top 36(914) Side opposite ducts 36(914) Compressor access 36(914) (Except for NEC requirements)

REQ’D CLEARANCES TO COMBUSTIBLE MAIL, in. (mm) Maximum extension of overhangs . . 48(1219)

Unit top........................... 14 (356)

Duct side of unit . .... .0

Side opposite ducts 9 (229)

Bottom of unit . . .... . . 0

Flue panel . . 30 (762) NEC REQ’D 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)

BLOWER ACCESS-

PANEL

5/0- ^COMPRESSOR ACCESS PANEL

UNIT

48SX024040 48SX024060 48SX030040 48SX030060/080 48SX036060/080 48SX036100/120

UNIT

48SX024040

RIGHT SIDE VIEW

ELECTRICAL

CHARACTERISTICS

208/230-1-60 333 151 208/230-1-60 208/230-1-60 208/230-1-60 348 158 208/230-1-60 366 166 94/43 208/230-1-60 378

CENTER OF GRAVITY (in./mm)

26.71/678 20.06/510

48SX024060 26.64/677 20.12/511

BURNER AND CONTROL BOX

ACCESS PANEL

UNIT WEIGHT

lb kg A

345 157 336 153 97/44 66/30 118/54 55/25

172

12 65/321 12 65/321

48SX030040 27 06/687 21 05/535 12.65/321 48SX030060/080 48SX036060/080 48SX036100/120

26.98/685 21 07/535 12.65/321

27.14/689 27 06/687

21 10/536 12 65/321 21 12/536

12 65/321

CORNER WEIGHT

104/47 50/23 107/49

100/45

53/24

69/31 121/55 58/26 84/38

97/44

87/40

(Ib/kg)

130/59 133/60

117/53 120/55

49/22

52/24

71/32

74/34

LEGEND

CG — Center of Gravity COND — Condenser LV — Low Voltage

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

MAT’L - Material NEC — National Electrical Code REQ’D — Required

Fig. 6 — 48SX024-036 Without Base Rail, Unit Dimensions

Page 7

REQ'D CLEARANCES FOR SERVICING in (mm) Duct panel

Unit top ... .

Siete opposite ducts Compressor access (Except for NEC requirements)

REQ'D CLEARANCES TO COMBUSTIBLE MATE in (mm) Maximum extension of overhangs

Unit top Duct side of unit . Side opposite ducts Bottom of unit Flue panel

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

48 (1219)

NEC REQ’D CLEARANCES in. (mm) Between units, control box side

Unit and ungrounded surfaces, control box side Unit and block or concrete walls and other grounded surfaces, control box side

7/8 (22.2) OIA CONTROL ENTRY

42 (1067)

36 (914) 36 (914) 36 (914)

14 (356)

. 0

9 (229)

. . 0

30 (762)

36 (914)

OPTIONAL RETURN

AIR OPENING

52 49 9/16"

(1320.8) (1259.3)

^1 13/16"

(46.2)

1 11/16'

(43.2)

17 1/16 -

I (433.9)

^OPTIONAL SUPPLY

AIR OPENING

1 5/8 (41 3) OIA GAS ENTRY 1/2" - 14 NPT GAS CONNECTION

REAR VIEW

UNIT

48SX024040

ELECTRICAL

CHARACTERISTICS

208/230-1-60

48SX024060 208/230-1-60 48SX030040 208/230-1-60

UNIT WEIGHT

357 163 110/50 369 168 113/51 59/27 360

48SX030060/080 208/230-1-60 372

164 169 106/48 75/34 127/58 64/29

LEFT 510E VIEW

A B

103/47 72/33

48SX036060/080 208/230-1-60, 208/230-3-60, 460-3-60 390 177 100/45 48SX036100/120 208/230-1-60, 208/230-3-60, 460-3-60 402

UNIT

48SX024040

CENTER OF GRAVITY (In./mm)

X Y

26 57/674 9

20 17/512 3 14 96/380 0

183 103/47 93/42 127/57

48SX024060 26 51/673 3 20.22/513 6 14 96/380 0

48SX030040 26 90/683 3 21.09/535 7 14 96/380 0 48SX030060/080 26 83/681.5 21 11/536.2 14 96/380.0 48SX036060/080 26.99/685 5 21 14/537 0 14.96/380 0 48SX036100/120 26 92/683 8 21 14/537 0

14 96/380.0

Fig. 7 — 48SX024-036 With Optional Base Rail, Unit Dimensions

CORNER WEIGHT

(Ib/kg)

C D

136/62

56/25

55/25 139/63 58/26 124/56 61/28

90/41 123/56 77/35

80/36

LEGEND

CG — Center of Gravity MAT'L — COND — Condenser NEC — LV — Low Voltage REQ’D —

NOTE: Clearances must be maintained to prevent recirculation of air from outdoor-fan discharge

Material National Electrical Code Required

Page 8

RIGHT SIDE VIEW

REQ'D CLEARANCES FOR SERVICING in. (mm)

Duct panel ... . . 0

Unit top 36(914) Side opposite ducts 36 (914) Compressor access 36(914) (Except for NEC requirements)

REQ’D CLEARANCES TO COMBUSTIBLE MATL in (mm) Maximum extension of overhangs

Unit top Duct side of unit . Side opposite ducts . . Bottom of unit . . Flue panel ...

. 48 (1219)

14 (356)

. 0

9 (229)

. . 0

30 (762)

NEC REQ’D CLEARANCES in (mm) Between units, control box side

Unit and ungrounded surfaces, control box side Unit and block or concrete walls and other grounded surfaces, control box side

7/8' C22.2) DIA. CONTROL ENTRY

42 (1067)

36 (914)

42 (1067)

1 1/4 (31.8) DIA

ALTERNATE POWER ENTRY

7/0 (22.2) DIA

ALTERNATE LV ENTRY

. 17 1/16'

(433.9)

OPTIONAL SUPPLY AIR OPENING

COMPRESSOR ACCESS PANEL

EVAP COIL OPTIONAL RETURN

AIR OPENING

^1 13/16'

C46.2)

UNIT

488X042060,080 488X042100,120 48SX048080

48SX048100/120/140

UNIT

48SX042060,080 48SX042100,120 48SX048080 48SX048100/120/140

• 1 5/8' (41.3) DIA GAS ENTRY

1/2' - 14 NPT

GAS CONNECTION

REAR VIEW

ELECTRICAL

CHARACTERISTICS

208/230-1-60 208/230-1-60 208/230-1-60

UNIT WEIGHT

391 403 183 103/47 94/43 123/56 422

208/230-1 -60 434 197

CENTER OF GRAVITY (in./mm)

26 66/677

Y Z

21 19/538

26.61/676 21.21/539 15 35/390 28 45/723 19.95/507 15.35/390

28.35/720 19 99/508 15 35/390

Fig. 8 — 488X042,048 Without Base Rail, Unit Dimensions

CORNER WEIGHT

A B C

178 100/45 91/41 120/55

192

109/50 85/39 112/51 88/40

CG — Center of Gravity MAT’L —

15 35/390

COND — Condenser NEC — LV - Low Voltage REQ’D -

(Ib/kg)

80/36

83/38 158/72 161/73

70/32

73/33

LEGEND

Material National Electrical Code Required

NOTE: Clearances must be maintained to prevent recirculation of air from outdoor-fan discharge

Page 9

10 1/16

(450 0)

5 5/0

(142.9)t

1 3/16-

(20 6)

— 10 -I

(253.0)

RIGHT SIDE VIEW

ALTERNATE POWER ENTRY

EVAP COIL ACCESS

ALTERNATE LV ENTRY

-11 1/21

(292.1)

12 13/16'.

LEFT SIDE VIEW

1 \/4

C31.75)

0 7/0

(22.23)\

13 1/2' (342.9)

ACCESS PANEL

_-3 5/16'

'^(BA.I)

37 7/16"

(950 9)

11 'S/16'

■ (207.31.4 f

1 3/8'(34.9)

1 9/16' (23.8)„

(39.7)^ B

S2 49 g/16'

(1320.8) (1259.3)

REQ’D CLEARANCES FOR SERVICING in. (mm)

Duct panel . . ... . . 0

Unit top . . 36(914) Side opposite ducts ... 36(914)

Compressor access 36(914)

(Except for NEC requirements) REQ’D CLEARANCES TO COMBUSTIBLE MATL. in (mm)

Maximum extension of overhangs Unit top Duct side of unit . Side opposite ducts Bottom of unit Flue panel

LEGEND

— Center of Gravity

COND

— Condenser

— Low Voltage

MAT’L

— Material

NEC

— National Electrical Code

REQ’D

— Required

o 15/16=^

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

OPTIONAL RETURN

OPTIONAL SUPPLY AIR OPENING

~ 4Í7l219)

........................0

COMPRESSOR ACCESS PANEL

14 (356)

. . 9 (229)

. . 0

. . 30 (762)

AIR OPENING

13/16'

(46 2)

UNIT

488X042060,080 488X042100,120 488X048080

ELECTRICAL

CHARACTERI8TIC8

208/230-1-60, 208/230-3-60, 460-3-60 208/230-1-60, 208/230-3-60, 460-3-60 427 194 109/50 208/230-1-60, 208/230-3-60, 460-3-60 446 293 115/52 91/41 164/75

UNIT WEIGHT

lb kg

189 106/48

415

488X048100/120/140 208/230-1-60, 208/230-3-60, 460-3-60 458 208

UNIT

488X042060,080 488X042100,120 48SX048080 488X048100/120/140 28.16/715.3

CENTER OF GRAVITY (in./mm)

X Y Z

26.55/674 4 21 22/539 0

26.50/673.0 21.24/539.6

28.25/717 6 20 04/509 0 20 08/510 0 17.66/448 6

17 66/448.6

17.66/448.6

Fig. 9 — 488X042,048 With Optional Base Rail, Unit Dimensions

CORNER WEIGHT

B C D

97/44 126/57 86/39

100/45 129/59 89/40

118/54

94/43 167/76 79/36

(Ib/kg)

76/35

NOTE: Ciearances must be maintained to prevent recirculation of air from outdoor-fan discharge

NEC REQ’D CLEARANCES, in (mm) Between units, control box side

Unit and ungrounded surfaces, control box side Unit and block or concrete walls and other grounded surfaces, control box side

42 (1067)

36 (914)

42 (1067)

Page 10

RECEIVING AND INSTALLATION

Step 1 - Check Equipment

IDENTIFY UNIT — The unit model number and serial num ber are stamped on unit identification plate. Check this information against shipping papers and job data.

INSPECT SHIPMENT — Inspect for shipping damage while unit is still on shipping pallet. If unit appears to be dam aged 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 pack

ages until installation.

Step 2 - Provide Unit Support

ROOF CURB — Install accessory roof curb in accordance with instructions shipped with curb. See Fig. 10 for roof curb dimensions. 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 ap plied gasketing can also result in air leaks and poor unit performance.

Curb should be level to within Vi inch. 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 be flush on the front of the unit (to allow condensate drain installation) and should extend 2 in. on the three remaining sides of the unit. See Fig. 11. Install a 6-in. gravel apron in front of condenser-air inlets to prevent obstruction of airflow by grass or shrubs. Do not secure the unit to the slab except when required by local codes.

FLUSH MOUNT — Place side of unit with duct panel flush against transition. On units with optional base rails, the skirt on duct-panel side of unit can be removed or relocated to allow unit to be mounted flush against transitions that ex tend below basepan of unit. To move skirt, proceed as follows:

1. Remove 4 screws holding skirt to base rail Retain screws.

2. Remove skirt or slide skirt inwards until alternate clear

ance holes align with base rails.

3. Secure with screws removed in Step 1. Holes align with

base rails.

To remove wood support under unit (with base rail only), loosen 4 screws above rigging holes and slide assembly out through rectangular hole.

Step 3 — Field Fabricate Ductwork — Secure all ducts to roof curb and building structure on vertical dis

charge units. Do not connect ductwork to unit. For horizon tal applications, field-supplied flanges should be attached to horizontal discharge openings and all ductwork should be secured to the flanges. Insulate and weatherproof all external ductwork, joints, and roof openings with counter flashing and mastic in accordance with applicable codes.

Ducts passing through an unconditioned space must be

insulated and covered with a vapor barrier.

If a plenum return is used on a vertical unit, the return should be ducted through the roof deck to comply with ap plicable fire codes.

A minimum clearance is not required around ductwork. Cabinet return-air static shall not exceed — .25 in. wg.

Step 4 — Provide Clearances — The required min imum operating and service clearances are shown in Fig. 2-9. Adequate combustion, ventilation, and condenser air must be provided.

A CAUTION

Do not restrict condenser airflow. An air restriction at either the outdoor-air inlet or the fan discharge can be detrimental to compressor life.

The condenser fan pushes air through the condenser coil and discharges it through the bank of louvers in the top cover, the decorative grille on the right side of the unit, 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 place the unit where water, ice, or snow from an overhang or roof will damage or flood the unit. Do not in stall the unit on carpeting, tile, or other combustible mate rials. The unit may be installed on wood flooring or on Class A, B, or C roof covering materials.

Step 5 — Rig and Place Unit

A CAUTION

When installing the unit on a rooftop, be sure the roof will support the additional weight. Refer to Fig. 2-9 for corner weight information.

Use spreader bars or crate top when rigging the unit. The units must be rigged for lifting as shown in Fig. 12 and 13 Refer to Tables 1 and 2 for operating weight and to Fig. 2-9 for corner weights. Use extreme caution to prevent damage

when moving the unit. Unit must remain in an upright po sition during all rigging and moving operations. The unit

must be level for proper condensate drainage; therefore, the

ground-level pad or accessory roof curb must be level be fore setting the unit in place. When a field-fabricated sup

port is used, be sure that the support is level and properly

supports the unit.

Page 11

FLAT

PITCHED

PART NUMBER

50SS900015 50SS900016 50SS900017

“A”

8" [203] 11" [279] 14" [356]

50SS900019 8" [203] 50SS900020 50SS900021 50SS900022 50SS900023 50SS900024

8" [203] 13«/ie" [344]

8" [203] 16%" [416]

8" [203] 19V4" [489]

8" [203] 22%" [568]

8" [203] 25%" [651]

“B” PITCH

— -

— —

10%" [276]

1:12 2:12 3:12

4.12 5:12 6:12

NOTES:

Roof curb must be set up for unit being instaiied

Seai strip must be applied as required for unit being instaiied.

Dimensions in [ ] are in miilimeters

Roof curb is made of 16 gage steel

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

Service ciearance 4 ft on each side

7 Direction of airfiow.

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

Fig. 10 — Roof Curb Dimensions

Page 12

FLUSH WITH SLAB-

■ ^ -I T

___

2 0”

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. Remove 4 screws to slide wood support through

rectangular hole in rail

A CAUTION

All panels must be in place when rigging.

12 0”

CONCRETE SU\B-

Fig. 11 - Slab Mounting Details

SECURE SCREW

AGAINST BASEPAN

TO HOLD LIFTING

BRACKET IN PLACE

DETAIL A

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 wooden top skid when rigging, to prevent rigging straps from damaging unit

A CAUTION

All panels must be in place when rigging.

UNIT

48SS

Size lb

018 024 030 036 042 447 203 048 060

UNIT

48SX

024 405 030 408 185 036 438 199 042 048 494 224

MAX

WEIGHT

332 150 375 170 384 174 408 185

486 220

525 238

184

210

463

mm in. mm in. mm

in.

49 4 1255 22.0 559 24.85 631

40.4 1255

24.3

618

22 4

570 24.85 631 565 24 85

22.3

22.5 570.7

21.0 533

21.5 545

22 8

579 28.9 733

22 4

569 28.9 733

22.4

569 28.9 733

22.8 579 34.9 885

21.1

536 34.9 885

24 85

631 631

28.85 733

34.85 885

UNIT

48SS

Size lb

018 024 030 036 042 435 197 048 474 215 060 513 233

UNIT

48SX

024 393 178 030 396 180 036 426 193 49 4 042 451 205 048 482 219

MAX

WEIGHT

in.

145

320

165

363

172

380 396 180 49 4

A B C

mm in. mm in. mm

24.4 619

22.6 574 28.2 715

22.5 571 28.2 715

1255 22.2

22.6 574 32.2 816

21.2 538 38.2 969

21.6 549 38.2 969

22.9

22.6 574

1255 22.5

22.9

21.3 540

28.2

28.2 715

563

582 32.2

32.2 571 32.2 582 38.2

38.2

715

816 816 816 969 969

Fig. 13 - Suggested Rigging For Units With

Optional Base Rail

UNITS WITHOUT BASE RAIL - If accessory rigging brackets are to be used for rigging, install them as follows:

A WARNING

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

Never use lifting brackets when the temperature is be low -10 F.

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 grav ity. (See Fig. 2, 4, 6, 8, and 12.).

2. Position paint protectors and foam strips between screws and painted surface of unit. Tighten screws until they make contact with the paint protectors.

3. Secure device or hook of sufficient strength to hole in bracket as shown in detail “A” of Fig. 12.

4. If wood top is available, use it for a spreader bar to pre vent straps from damaging unit. If wood top is not avail able, use spreader bars of sufficient length.

Page 13

UNITS WITH OPTIONAL BASE RAIL - Lifting holes are provided in optional base rail as shown in Fig. 12. Op erating weights are shown in Tables 1 and 2. Refer to Rig ging instructions on unit.

Protective wood support must be removed from unit be fore unit is mounted to curb. Remove 4 screws that secure support above rigging holes in rails. Slide support out through rectangular hole in rail. See Fig. 13.

Step 6 — Connect Condensate Drain

NOTE: When installing condensate drain connection be sure to comply with local codes and restrictions.

Model 48SS,SX disposes of condensate water through a

¥4 in. NPT fitting which exits through the compressor ac

cess panel. See Fig. 2-9 for location.

Install field-supplied condensate trap at end of conden sate connection to ensure proper drainage. See Fig. 14.

V'MIN.

If the installation requires draining the condensate water away from the unit, install a 2-in. trap at the 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 overflow ing. Prime the trap with water. Connect a drain tube using a minimum of y4-in. PVC or V4-m. copper pipe (all fieldsupplied) at the outlet end of the 2-in. trap. Do not under size the tube. Pitch the drain tube downward at a slope of at least one in. for every 10 ft of horizontal run. Be sure to check the drain tube for leaks.

Condensate water can be drained directly onto the roof in rooftop installations (where permitted) or onto a gravel apron in ground-level installations. When using a gravel apron, make sure it slopes away from the unit.

Step 7 — Install Flue Hood — The flue hood as

sembly is shipped screwed to the control box in the burner compartment. Remove the burner access panel to locate the assembly.

A CAUTION

The venting system is designed to ensure proper vent ing. The flue hood assembly must be Installed as indi cated in this section of the unit installation instructions.

Install the flue hood as follows:

1. Remove from shipping location. Place vent cap assem bly over flue panel. Orient screw holes in vent cap with holes in the flue panel.

2. Secure flue hood to flue panel by inserting a single screw on the right side, the left side, and the top of flue hood.

Step 8 — Install Gas Piping — The gas supply pipe

enters the unit through the access hole provided. The gas connection to the unit is made to the '/2-in. FPT gas inlet on the manual shutoff or gas valve.

Install a gas supply line that runs to the heating section. Refer to Table 3 and the National Fuel Gas Code (NFGC) for gas pipe sizing. mended that a black iron pipe is used. Check the local util ity for recommendations concerning existing lines. Size gas supply piping for 0.5 in. wg maximum pressure drop. Never

use pipe smaller than the Vi-in. FPT gas inlet on the unit gas valve.

For natural gas applications, the gas pressure at unit gas connection must not be less than 4.0 in. wg or greater than

13 in. wg while the unit is operating. For propane applica tions, the gas pressure must not be less than 4.0 in. wg or greater than 13 in. wg at the unit connection.

When installing the gas supply line, observe local codes pertaining to gas pipe installations. Refer to the NFGC ANSI (American National Standard’s Institute) Z223.1-1988 NFPA (National Fire Protection Association) latest edition (in Canada, CAN/CGA B149.1, (2)-M86). In the absence of local building codes, adhere to the following pertinent recommendations :

1. Avoid low spots in long runs of pipe. Grade all pipe

'/4 inch in every 15 ft to prevent traps. Grade all hori

zontal runs downward to risers. Use risers to connect to heating section and to meter.

2. Protect all segments of piping system against physical

and thermal damage. Support all piping with appro priate straps, hangers, etc. Use a minimum of one hanger every 6 ft. For pipe sizes larger than ommendations of national codes.

3 Apply joint compound (pipe dope) sparingly and only to

male threads of joint when making pipe connections. Use only pipe dope that is resistant to action of liquefied petroleum gases as specified by local and/or national codes.

Never use Teflon tape.

4. Install sediment trap in riser leading to heating section per Fig. 15. This drip leg functions as a trap for dirt and condensate.

5. Install an accessible, external, manual main shutoff valve in gas supply pipe within 6 ft of heating section.

6. Install ground-joint union close to heating section be tween unit manual shutoff and external manual main shut off valve.

7. Pressure-test all gas piping in accordance with local and national plumbing and gas codes before connecting pip ing to unit.

NOTE: Pressure test the gas supply system after the gas supply piping is connected to the gas valve. The supply piping must be disconnected from the gas valve during the testing of the piping systems when test pressure in excess of 0.5 psig. Pressure test the gas supply piping

system at pressures equal to or less than 0.5 psig. The

unit heating section must be isolated from the gas piping

system by closing the external main manual shutoff valve

and slightly opening the ground-joint union.

Do not use cast-iron pipe. It is recom

'/2 in., follow rec

Page 14

Table 1 — Physical Data — Unit 48SS

UNIT SIZE 48SS NOMINAL CAPACITY (ton) OPERATING WEIGHT (lb)

Without Base Rail With Optional Base Rail

COMPRESSORS

Quantity

REFRIGERANT (R-22)

Charge (lb)

REFRIGERANT METERING DEVICE Aoutrol™ Device

Orifice ID (in.)

CONDENSER COIL

Rows...Fins/in. Face Area (sq ft)

CONDENSER FAN

Nominal Cfm Diameter (in.) Motor Hp (Rpm)

EVAPORATOR COiL

Rows Fins/in. Face Area (sq ft)

EVAPORATOR FAN

Nominai Airflow (Cfm) Size (in.)

FURNACE SECTION*

Burner Orifice No. (Qty...driii size)

Naturai Gas

Burner Orifice No. (Qty...drill size)

Propane Gas

RETURN-AiR FILTERS (in.)f

Throwaway

018040 024040

1V2 2 2 272 303 315 320 324 324

296

Rotary Reciprocating

1 2 60 2 75 2 75 3 40 3 40 3 40 .030

1. .17 1. .17

5.95

1700

18 18

Vs (850) Vs (850)

3 15

1 83 2 29 600

10 X 10 10 X 10

1. 32 1 32 2 38 1 ..32

1...41 1 .41

20 X 20 20 X 20 20 X 20 20 X 24 20 X 24 20 X 24 20 X 24

327

.030 030 030 .030 .030 032

5 95 5 95 5 95 5.95 5 95 5 95

1700 1700 1900 1900 1900 1900

3 15 3 15

800 800 1000 1000 1000 1200

024060 030040 030060 030080 036060

339 344 356 356

1. .17 2. .17 2. .17

18 18 18 18 18

Va (850) Va (850) Va (850)

2 29

10 X 10

2 46

2V2 2V2 2V2

2...17

Va (850)

3 .15

2.29

10 X 10

1...41 2.. 46 2 42 2. 46

3 . 15 3.. 15 3 15

2 29 2 29 3 06

Direct Drive

10 X 10

2 38

10 X 10 10 X 10

2 32

336 360

4 30

2. .17 2. .17 2. .17

'A (1050)

2 38 2. 32

036080 036100

3 3

336 348 348 360

4 30

032

5 95 5 95 5 95

1900 1900 1900

18 18 18

'A (1050) '/4 (1050) 'A (1050)

3 15 3 15 3 15 3 06 3 06 3.06

1200 1200 1200

10 X 10 10 X 10 10 X 10

2 42 3 44

20 X 24 20 X 24 20 X 24

036120

372 372

4 30

032

3 36 3 32

4.30 .032

2. .17

3 42

UNIT SIZE 48SS NOMINAL CAPACITY (ton) OPERATING WEIGHT (lb)

Without Base Raii

With Optionai Base Rail

COMPRESSORS

Quantity

REFRIGERANT (R-22)

Charge (lb)

REFRIGERANT METERING Acutroi' Device

DEVICE

Orifice ID (in.)

CONDENSER COIL

Rows...Fins/in. Face Area (sq ft)

CONDENSER FAN

Nominal Cfm Diameter (in.) 18 Motor Hp (Rpm) 'A (1050)

EVAPORATOR COIL

Rows Fins/in. 3. .15 Face Area (sq ft)

EVAPORATOR FAN Direct Drive

Nominal Airflow (Cfm) Size (in.)

FURNACE SECTiON*

Burner Orifice No.

(Qty...driii size)

Natural Gas

Burner Orifice No.

(Qty...driil size)

Propane Gas

RETURN-AIR FILTERS (in.)t

Disposable

•Based on altitude of 0-2000 feet tRequired filter sizes shown are based on the larger of the ARI (Air Conditioning & Refrigeration Institute) rated

cooling airflow or the heating airflow at a velocity of 300 ft/min for disposable type or 450 ft/min for high-capacity

type Air filter pressure drop must not exceed 0 08 in wg

**Sq inch. Filter is mounted external to unit

042060 042080 042100 042120 048080 048100 048120 048140

3'/2

375 375 387 387 414 399

5 20

034 .034

2. .17 2. .17 2. 17

7.04 7 04 1900

3 33 3.33 1400 1400

10 X 10 10 X 10 10 X 10

2. 38 2 32

2. 46

24 X 24

3V2

399 411 411

Reciprocating

5 20

1900

'A (1050)

3. .15

2 42

24 X 24

3Va 3'/2 4 4 4 4

5.20 5 20 6.50 6 50

034 034 030 030

7.04 7 04 8.67 8 67 8 67 8 67

1900 1900 2400

18 18 20 20

'A (1050) '/4 (1050) Vs (1050)

3. .15 3...15 3.. 15 3. 15 3. 15 3. 15 4. 15 3 33 3.33 4 44 4.44 4.44 4.44

1400 1400 1600 1600 1600 1600

3 36 3.32

3 44

24 X 24 24 X 24 24 X 30 24 X 30

438 450 450 450 477

2...17 2...17 2. 17

10 X 10 10 X 10 10 X 10 10 X 10 10 X 10

2 32

3 42

2 42

426 426 426 453

6 50

030

2. .17

2400 2400 2400

Vs (1050) V3 (1050) Vs (1050) Vs (1050) Vs (1050) V3 (1050) Vs (1050)

3 36 3.. 32 3.. 30

3 44 3 42 3 40

24 X 30 816** 24 X 30

060080 060100 060120 060140

Hermetic Scroii

6 50

030

2. 17

7 00

030

2. .17 8 67 8 67 8 67 8 67

2400 2400 2400 2400

4.44 4.44 4.44 4.44

1995 1995 1995

10 X 10 10 X 10 10 X 10 10 X 10

2 32 3. 36 3.32

3 42 3. 44 3.42 3 40

465 489

7 00 7 00 7 00

030 030 030

2. .17 2. .17 2. .17

4.. 15 4.. 15 4. 15

24 X 30 24 X 30 960**

5 5

465 465 489 489

1995

3 30

Page 15

Table 2 — Physical Data — Unit 48SX

UNIT SIZE 48SX NOMINAL CAPACITY (ton) 2 OPERATING WEIGHT (lb)

Without Base Rail With Optional Base Rail

COMPRESSORS

Quantity

REFRIGERANT (R-22)

Charge (lb)

REFRIGERANT METERING DEVICE Acutrol'“ Device

Orifice ID (In.) 034

CONDENSER COIL

Rows...Fins/in. 2.. 17 Face Area (sq ft)

CONDENSER FAN

Nominal Cfm 2200 2200 Diameter (in.) 20 Motor Hp (Rpm) У4 (1100) '/4 (1100) У4 (1100) У4 (1100)

EVAPORATOR COIL

Rows Fins/in. Face Area (sq ft) 36 3.6 2 7 2.7 27 36

EVAPORATOR FAN

Nominal Airflow (Cfm) 800 Size (in.)

FURNACE SECTION*

Burner Orifice No. (Qty...drill size)

Natural Gas

Burner Orifice No. (Qty...drlll size)

Propane Gas

RETURN-AIR FILTERS (in.)t

Disposable

024040 024060

333 345 357 369

39 39

7.0 70

2. .15 2 15

10 X 10 10 X 10 10 X 10 10 X 10 10 X 10 10 X 10 10 X 10 10 X 10 10 X 10

1 32

1 41

24 X 24 24 X 24 24 X 24 24 X 24 24 X 24 24 X 24 24 X 24 24 X 24 24 X 24

.034 .030 030

2.. 17

800

2 38 2 46

030040

2Уг

336 360

4.5 45

2.. 17 2.. 17 70 70

2200 2200 2200 2200

3 15 3 15 3 15 4 15

1000 1000 1000

1 32

1 .41 2 .46 2.42 2. .46 2 42 3 ..44

030060

2Уг 2Уг 3

348 348 366 372 372 390

20 20

2 38

030080

Scroii

45 54

030 032

2.. 17 70

У4 (1100)

Direct Drive

2 32

036060

2.. 17 70

У4 (1100)

1200 1200 1200 1200

2 38

036080 036100 036120

3 3 3

366 390 402

5.4 032

2.. 17 2.. 17 2.. 17 70 7.0 70

2200 2200

20 20 20

У4 (1100) У4 (1100) У4 (1100)

4. 15 4 .15 4 15 36

2 32

378 378

54 5.4

032 .032

3.6

3 36 3 32

402

2200

3 42

UNIT SIZE 48SX NOMINAL CAPACITY (ton) ЗУг ЗУ2 ЗУ2 ЗУ2 4 4 4 4 OPERATING WEIGHT (lb)

Without Base Rail With Optional Base Rail

COMPRESSORS

Quantity

REFRIGERANT (R-22)

Charge (lb)

REFRIGERANT METERING

DEVICE

Orifice ID (in.)

CONDENSER COIL

Rows...Fins/in. 2.. 17 2.. 17 2.. 17 2.. 17 2.. 17 2.. 17 2.. 17 2.17 Face Area (sq ft)

CONDENSER FAN

Nominal Cfm Diameter (in.) Motor Hp (Rpm)

EVAPORATOR COIL

Rows Fins/in. Face Area (sq ft)

EVAPORATOR FAN Direct Drive

Nominal Airflow (Cfm) Size (in.)

FURNACE SECTION*

Burner Orifice No.

(Qty...drill size)

Natural Gas

Burner Orifice No.

(Qty...drill size)

Propane Gas

RETURN-AIR FILTERS (in.)t

Disposable

*Based on an altitude of 0-2000 feet fRequired filter sizes shown are based on the ARI (Air Conditioning & Refrigeration Institute) rated heating airflow at

a velocity of 300 ff/min for disposable type or 450 ft/min for high-capacity type Air filter pressure drop must not exceed 0.08 in. wg

**Sq inch Filter is mounted external to unit.

042060

391 391 403 403 422 434 434

415 415 427 427 446 458

5.7

034 034 034 .034 .034 034 034

2400 2400 2400 2400 2400 2400 2400

20 20 20 20 20 20

3...15

4.4 44 44 44 44

1400

lOx 10 10 X 10 10 X 10 10 X 10 10 X 10

2. .38 2 32 3 36 3 .32 2 ..32

2 46 2 42 3 44 3 42

24 X 30

042080 042100 042120 048080 048100 048120

Scroll

5 7

8.7 87 8.7 8.7 8.7 87

3 . 15 3.15 3 . 15

1400 1400 1400 1600 1600

24 x30

57 57 58

Acutrol" Device

24 X 30 24 X 30

4.15

2 .42

24 X 30

5 8 5.8 5.8

4.. 15 4.15

4.4 4.4 44

10 X 10 10 X 10 10 X 10

3 36 3 32 3.. 30

3 44 3 42 3.. 40

24 X 30 24 X 30 816**

458 458

20 20

1600 1600

048140

434

.034

8 7

2400

4 ..15

Page 16

(Text continued from page 13)

A CAUTION

Unstable operation may occur when the gas valve and manifold assembly are forced out of position while connecting improperly-routed rigid gas pip ing to the gas valve. Use a backup wrench when making connection to avoid strain on, or distortion of, the gas control piping.

A CAUTION

If a flexible conductor is required or allowed by the authority having jurisdiction, black iron pipe shall be installed at the gas valve and shall extend a min imum of 2 in. outside the unit casing.

A WARNING

Never use a match or other open flame when check ing for gas leaks. Never purge gas line into com bustion chamber. Failure to follow this warning could result in an explosion causing personal injury or death.

8. Check for gas leaks at the field-installed and factoryinstalled gas lines after all piping connections have been completed. Use soap-and-water solution (or method spec ified by local codes and/or regulations).

CONFIGURING UNITS FOR DOWNFLOW (VERTICAL) DISCHARGE

A WARNING

Before performing service or maintenance operations on the system, turn off main power to unit or electrical shock could result.

1. Open all electrical disconnects before starting any serv ice work.

2. Remove return duct cover located on duct panel. Figure 16 shows duct cover removed. Save duct cover and screws.

3. Locate lances in basepan insulation that are placed over the perimeter of the vertical duct opening cover (Fig. 17).

4. Using a straight edge and shop knife, cut and remove the insulation around the perimeter of the cover. Remove and save 5 screws securing the cover to the basepan and slide out the cover. Discard the cover (Fig. 18).

5 Remove supply duct cover located on duct panel.

Figure 16 shows duct cover removed. Save duct cover and screws.

6. Remove and discard 2 screws which secure vertical dis charge opening cover to basepan (Fig. 19). Slide cover forward to disengage, then tilt and remove cover through vertical discharge opening in bottom of unit. Discard duct cover (Fig. 20).

Step 9 — Install Duct Connections — The unit

has duct flanges on the supply- and return-air openings on the side and bottom of the unit. See Fig. 2-9 for connection

sizes and locations.

A CAUTION

Collect ALL screws that were removed. Do not leave screws on rooftop as permanent damage to the roof may occur.

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

8. It is recommended that the basepan insulation around the perimeter of the vertical return-air opening be se cured to the basepan with aluminum tape. Applicable local codes may require aluminum tape to prevent ex posed fiberglass.

Cover both horizontal duct openings with the duct cov

9. ers from Steps 2 and 5. Make sure opening is air- and watertight.

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

NOTE: The design and installation of the duct system must be in accordance with the standards of the NFPA for instal

lation of nonresidence-type air conditioning and ventilating systems, NFPA 90A or residence-type, NFPA 90B; and/or

local codes and residence-type, NFPA 90B; and/or local codes

and ordinances.

Page 17

Table 3 — Maximum Gas Flow Capacity*

NOMINAL

IRON PIPE,

SIZE

(In.)

V2 .622

% .824

1V4 1.380 1400

IV2

‘Capacity of pipe in cu ft of gas per hr for gas pressure of 0.5 psig or iess. Pressure drop of 0 5-in. wg

(based on a 0.60 specific gravity gas). Ref: Tabie C-4, Nationai Fire Protection Association NFPA54.

fThis iength inciudes an ordinary number of fittings.

INTERNAL DIAMETER

(In.)

1 049 680 465 375 320 285 260 240 220 205

1.610 2100 1460 1180 990

10 20 30 40

175 120 97 360 250 200 170

950 770

82 73 66 61

600 580 530 490 460

LENGTH OF PIPE, FTf

50 60 70 80

151 138 125 118

900 810

750 690 650

90 100

53 50 44

110

430

125

150 175

40 103 93 84 77 72 195 175 400 360 325 620

160 145 135

550 500 460 430

200

— —

300 280

SUPPLY DUCT

OPENiNG

RETURN DUCT

OPENiNG

Fig. 16 — Supply and Return Duct Openings

Fig. 18 — Vertical Duct Cover Removed

Fig. 17 - Lance Location for Vertical Duct

Opening Cover

Fig. 19 — Removal of Vertical Discharge

Opening Cover

Page 18

Fig. 20 — Vertical Discharge Cover Removed

Adhere to the following criteria when selecting, sizing,

and installing the duct system:

1. Units are shipped with all 4 duct openings covered. Re move appropriate panels for intended installation.

2. Select and size ductwork, supply-air registers, and return-air grilles according to American Society of Heating, Refrigeration and Air Conditioning Engineers (ASHRAE) recommendations.

3. Use flexible transition between rigid ductwork and unit to prevent transmission of vibration. The transition may be screwed or bolted to duct flanges. Use suitable gas kets to ensure weathertight and airtight seal.

4. All units must have field-supplied filters or accessory filter rack installed in the return-air side of the unit. Rec ommended sizes for filters are shown in Tables 1 and 2.

5. Size all ductwork for maximum required airflow (either heating or cooling) for unit being installed. Avoid abrupt duct size increases or decreases or performance may be affected.

6. Adequately insulate and weatherproof all ductwork located outdoors. Insulate ducts passing through uncon ditioned space, and use vapor barrier in accordance with latest issue of Sheet Metal and Air Conditioning Contractors National Association (SMACNA) and Air Conditioning Contractors of America (ACCA) mini mum installation standards for heating and air condition

ing systems. Secure all ducts to building structure.

7. Flash, weatherproof, and vibration-isolate all openings

in building structure in accordance with local codes and good building practices.

Step 10 — Install Electrical Connections

A WARNING

The unit cabinet must have an uninterrupted, unbroken electrical ground to minimize the possibility of per

sonal injury if an electrical fault should occur. This ground may consist of an electrical wire connected to the unit ground lug in the control compartment, or conduit ap proved for electrical ground when installed in accor dance with NEC (National Electrical Code) ANSI/ NFPA (latest edition) (in Canada, Canadian Electrical

Code CSA [Canadian Standards Association] C22.1)

and local electrical codes. Do not use gas piping as an

electrical ground. Failure to adhere to this warning could result in personal injury or death.

A CAUTION

Failure to follow these precautions could result in dam

age to the unit being installed:

1. Make all electrical connections in accordance with NEC ANSI/NFPA (latest edition) and local electrical codes governing such wiring. In Canada, all electrical connec tions must be in accordance with CSA standard C22.1 Canadian Electrical Code Part 1 and applicable local codes. Refer to unit wiring diagram.

2. Use only copper conductor for connections between fieldsupplied electrical disconnect switch and unit. DO NOT USE ALUMINUM WIRE.

3. Be sure that high-voltage power to unit is within oper ating voltage range indicated on unit rating plate.

4. Do not damage internal components when drilling through any panel to mount electrical hardware, conduit, etc. On 3-phase units, ensure phases are balanced within 2 per cent. Consult local power company for correction of im proper voltage and/or phase imbalance.

HIGH-VOLTAGE CONNECTIONS - The unit must have a separate electrical service with a field-supplied, water proof, 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 Table 4 for electrical data.

The field-supplied disconnect switch box may be mounted on the unit over the high-voltage inlet hole when the standard power and low-voltage entry points are used. See Fig. 2-9 for acceptable location.

Standard Power Entry — Proceed as follows to complete the high-voltage connections to the unit:

1. Connect ground lead to chassis ground connection when using separate ground wire.

2. Run high-voltage leads into unit control box.

3. Locate black and yellow wires connected to line side of contactor.

4. Cut wires at partition where they exit control box.

5. Strip back leads and connect to high voltage leads. On 3-phase units, blue wire is provided stripped back and ready to connect to high voltage lead. See unit wiring label and Fig. 21.

Page 19

THERMOSTAT (TYPICAL)

(^(y)(^(R)0

LEADS (SEE UNIT

WIRING LABEL)

LEGEND

---------

Field Control-Voltage Wiring

-------

— Field High-Voltage Wiring

NOTE: Use biue wire for 3-phase units only

Fig. 21 — High- and Control-Voltage Connections

Alternate Power Entry

Remove knockouts in fixed compressor panel located on duct panel side of unit.

Route high-voltage leads into high-voltage terminal box. Connect ground wire to green-yellow wire using field-

supplied splice. Connect power wires to unit high-voltage leads. On 3-phase units, locate blue wire projecting from com

pressor junction box. Cut wire at partition and route into high-voltage junction box through grommet in back of junction box.

On 3-phase units, strip back blue lead and connect to

third leg of the power wires.

SPECIAL PROCEDURES FOR 208-V OPERATION

A WARNING

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

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

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

Save the wirenut. Connect the red lead to the contactor terminal from which

the orange lead was disconnected. Using the wirenut removed from the red lead, insulate

the loose terminal on the orange lead. Wrap the cover with electrical tape so that the metal ter

minal cannot be seen.

CONTROL VOLTAGE CONNECTIONS - Locate the room thermostat on an inside wall in the space to be conditioned, where it will not be subjected to either a cooling or heating

source or direct exposure to sunlight. Mount the thermostat

4 to 5 ft above the floor NOTE. Do not use any type of power-stealing thermostat.

Unit control problems may result.

Use no. 18 American Wire Gage (AWG) color-coded, insulated (35 C minimum) wires to make the control volt age connections between the thermostat and the unit. If the thermostat is located more than 100 ft from the unit (as measured along the control voltage wires), use no. 16 AWG color-coded, insulated (35 C minimum) wires.

Standard Connection — A grommeted, control-voltage in let hole is located in the flue panel adjacent to the control access panel. See Fig 2-9. Provide a drip loop before run ning wire through panel.

Run the low-voltage leads from the thermostat, through the inlet hole, and into unit low-voltage splice box.

Locate five 18-gage wires leaving control box. These lowvoltage connection leads can be identified by the colors red, green, yellow, brown, and white). (See Fig. 21.) Cut wires at the point where they exit control box. On 48SX024,030, do not cut yellow wire. Stripped yellow lead is located in connection box. Ensure the leads are long enough to be routed into the low-voltage splice box located below the right side of the control box. Route leads through hole in bottom of control box and make low-voltage connections as shown in Fig. 21. Secure all cut wires, so that they do not interfere with operation of unit.

Alternate Connection — Remove knockout in compressor fixed panel located below high-voltage knockout. Remove rubber grommet from standard low-voltage power entry and install it in hole left when knockout was removed. Route thermostat wires through grommet providing drip loop at panel Connect low-voltage leads as shown in Fig. 21. On 48SX024 and 030 units, the yellow wire originating from discharge thermostat of compressor must be cut and routed into low-voltage section of junction box.

HEAT ANTICIPATOR SETTING - The room thermostat heat anticipator must be properly adjusted to ensure proper heating performance. Set the heat anticipator, using an am meter between the W and R terminals to determine the exact required setting.

NOTE: For thermostat selection purposes, use 0.18 amp for the approximate required setting.

Failure to make a proper heat anticipator adjustment will result in improper operation, discomfort to the occupants of the conditioned space, and inefficient energy utilization; however, the required setting may be changed slightly to provide a greater degree of comfort for a particular installation.

Recommended thermostats are as follows:

TYPE

Single-Stage Heating and Cooling Manual Changeover

Auto. Changeover

•Recommended for use with subbase HH93AZ040

tRecommended for use with subbase HH93AZ176

PART NO.

HH01AD040* HH01AD046 HH01PC184

HH07AT174t

HH01PC185

TRANSFORMER PROTECTION - The unit transformer

protection may be one of 2 types.

The first transformer type may contain an auto, reset over current protector for control circuit protection. If this de vice trips, it may reset without warning, starting the heat ing or cooling section of this product. Use caution when servicing; if overcurrent protector continues to trip, there is a problem in the low-voltage electrical circuit, such as an electrical short, ground, or transformer overload. Discon nect power, correct the condition, and check for normal unit operation.

The second transformer type is of the energy-limiting type. It is set to withstand a 30-second overload or shorted secondary condition.

Page 20

Table 4 — Electrical Data

UNIT 48SS

018

024 030 036

042 048 060

030

036

042

048 060

036 042

048

060

UNIT 48SX

024

030

036

042

048 036

042 048

036 042 048

AWG — American Wire Gage COND — Condenser FLA — Fail Load Amps HACR — Heating, Air Conditioning and Refrigeration LRA — Locked Rotor Amps MCA — Minimum Circuit Amps MOCP — Maximum Overcurrent Protection RLA — Rated Load Amps

‘Fuse or HACR breaker NOTES:

1. in compliance with NEC (Nationai Electricai Code) requirements for muitimotor 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 CGA (Canadian Gas Association) units may be fuse or circuit breaker

2. Minimum wire size is based on 60 C copper wire, if other than 60 C wire is used, or if iength exceeds wire length in table, de termine size from NEC.

3. Unbalanced 3-Phase Supply Voltage

Never operate a motor where a phase imbalance in supply volt age is greater than 2%. Use the following formula to determine

the percent of voltage imbalance.

V-PH-HZ

208/230-1-60

208/230-3-60

460-3-60

208/230-1-60

208/230-3-60

460-3-60

LEGEND

VOLTAGE

RANGE

Max RLA

Min

187 253 18.0

253

187

414

506

253

187

253 13.9 88.0

187

506 6.8

414

COMPRESSOR

LRA FLA

7.6 45.0 07 1 8 12.0 15

12.4 61.0 07 20 18.2 30

14.4

20.4

26.4

32.1

9.4

11 7

140 91 0 150 99 0 193 123.0

56 40 0 0.8 1.4 9.2 64

8.2

100 62 0 1.1 32 16.8 25

12 9 150

16.7

20.0

26.4

10.9 75.0

15.0 99.0

5.4 40.0 0.8 1.4 9.0 10 14

8.2 49 5 0.8 2.3

82.0

96.0 104 0 129 0 169 0

66 0

75.0 1.4 2.8 18.8 30

42 0 50 0

62.5

76.0

95.0

104.0

129.0

44.0

COND

FAN

MOTOR

1 4 1 4

1.4

2.1

2.1 6.8 49.0

1.4

2.1

2.1 08

1.1

1.4

1.4 1 4

1.4

1.4 1 4

0.8 1.6 10.9 15 14

INDOOR

FAN

FLA

2.0

2.8

4.0

5.0 40.1 60

2.0

4.0 22.9 35

5.0 25.9 40

6.8 33.0 50 20

2.3

2.0

2.6

2.8

3.1

5.0

2.8 17.8 25 12 70

3 1 21.9 30

% Veltage imbalance

^ .|QQj^ max voltage deviation from average voltage

Example: Supply voltage is 460-3-60.

Determine maximum deviation from average voltage. (AB) 457 - 452 = 5 V (BC) 464 - 457 = 7 V (AC) 457 - 455 = 2 V

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

% Voltage Imbalance = 100 x —^

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

maximum allowable 2%.

POWER SUPPLY

MCA

21.8 26 7 40

30.9 50

15.5

108

13.7

19.5 22 8 25 1

29.5

39.4

25.2

134

MOCP*

60 25

10 14 15 20

30 30 30 45 60

20 14

AB = 452 V BC = 464 V AC = 455 V

Average Voltage =

= 1 53%

average voltage

457

AWG 60 C MIN WIRE

SIZE

14 12 10 100 10 90

8 6 100 6 100

12 80 12 65 10 85 10 75

14 14 12 100

12 10 10 10

10 60 10 80

452 -H 464 -I- 455

1371

= 457

MAX WIRE

LENGTH

(ft)

100

100 100 100

100

100 100 100

75 80

75 95

80 90

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

Page 21

PRE-START-UP

A WARNING

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

1. Follow recognized safety practices and wear protec tive goggles when checking or servicing refrigerant system.

2. Do not operate compressor or provide any electric power to unit unless compressor terminal cover is in place and secured.

3. Do not remove compressor terminal cover until all electrical sources are disconnected.

4. Relieve and reclaim all refrigerant from system be fore touching or disturbing anything inside terminal box if refrigerant leak is suspected around compres sor terminals.

5. Never attempt to repair soldered connection while refrigerant system is under pressure.

6. Do not use torch to remove any component. System contains oil and refrigerant under pressure. To re move a component, wear protective goggles and pro ceed as follows:

a. Shut off gas supply and then electrical power to

unit.

b. Relieve and reclaim all refrigerant from system

using both high- and low-pressure ports.

c. Cut component connecting tubing with tubing cut

ter and remove component from unit.

d. Carefully unsweat remaining tubing stubs when

necessary. Oil can ignite when exposed to torch flame.

Before lighting the unit for the first time, perform the following: If the gas supply pipe was not purged before connecting the unit, it will be full of air. It is recommended that the ground joint union be loos ened, and the supply line be allowed to purge until the odor of gas is detected. Never purge gas lines into a combustion chamber. Immediately upon detec tion of gas odor, retighten the union. Allow 5 min utes to elapse, then light unit

Make sure that outdoor-fan blade is correctly posi tioned in fan orifice. Leading edge of outdoor-fan blade should be

ifice (see Fig. 22).

Make sure that air filter(s) is in place.

Make sure that condensate drain trap is filled with water to ensure proper drainage.

Make sure that all tools and miscellaneous loose parts have been removed.

‘/2 in. maximum from plastic fan or

Proceed as follows to inspect and prepare the unit for ini

tial 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.

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

broken lines, loose parts, disconnected wires, etc.

b. Inspect for oil at all refrigerant tubing connections

and on unit base. Detecting oil generally indicates a refrigerant leak. Leak-test all refrigerant tubing con nections using electronic leak detector, halide torch, or liquid-soap solution. If a refrigerant leak is detected, see Check for Refrigerant Leaks section below.

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.

4. Verify the following conditions:

A CAUTION

Do not purge gas supply into the combustion cham ber. Do not use a match or other open flame to check for gas leaks. Failure to follow this warning could result in an explosion causing personal injury or death.

START-UP

Check for Refrigerant Leaks - Proceed as follows

to locate and repair a refrigerant leak and to charge the unit:

1. Locate leak and make sure that refrigerant system pres sure has been relieved and reclaimed from both highand low-pressure ports.

2. Repair leak following accepted practices. NOTE: Install a filter drier whenever the system has been

opened for repair.

3. Add a small charge of R-22 refrigerant vapor to system and leak-test unit.

4. Evacuate and reclaim refrigerant from refrigerant sys tem if additional leaks are not 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 refrig

erant to compensate for internal volume of filter drier.

Page 22

Start Up Heating Section and Make

Adjustments

A CAUTION

Complete the required procedures given in Pre-Start-Up section above before starting the unit.

A CAUTION

These units are designed to consume the rated gas in puts using the fixed orifices at specified manifold pres

sures as shown in Table 5. DO NOT REDRILL THE ORIEICES UNDER ANY CIRCUMSTANCES.

Do not jumper any safety devices when operating the unit.

Make sure that burner orifices are properly aligned. Un stable operation may occur when the burner orifices in the manifold are misaligned.

Follow the lighting instructions on the heating section operation label (located inside the burner or blower access door) to start the heating section.

NOTE; Make sure that gas supply has been purged, and

that all gas piping has been checked for leaks. CHECK HEATING CONTROL - Start and check the unit

for proper heating control operation as follows: (See fur nace lighting instructions located inside burner or blower access panel.)

1. Place the room thermostat SYSTEM switch in the HEAT position and the fan switch in the AUTO, position.

2. Set the heating temperature control of the thermostat above room temperature.

3. The induced-draft motor will start.

4. After a call for heating, the main burner should light within 5 seconds. If the burners do not light, there is a 22-second delay before another 5-second try. If the burn ers still do not light, this sequence is repeated. If the burners do not light within 15 minutes from the initial call for heat, there is a lockout. To reset the control, break the 24-v power to W.

5. The evaporator fan will turn on 45 seconds after the flame has been established. The evaporator fan will turn off 45 seconds after the thermostat has been satisfied.

CHECK GAS INPUT — Check gas input and manifold pres sure after unit start-up. (See Table 5.) If adjustment is required proceed as follows.

The rated gas inputs shown in Table 5 are for al titudes from sea level to 2000 ft above sea level. These in puts are based on natural gas with a heating value of

1050 Btu/ft^ at 0.65 specific gravity, or propane gas with a heating value of 2500 Btu/ft^ at 1.5 specific gravity. For elevations above 2000 ft, reduce input 4% for each

1000 ft above sea level. When the gas supply being used has a different heating value or specific gravity, refer to na tional and local codes, or contact your distributor to deter mine the required orifice size.

Table 5 — Rated Gas Inputs at

ADJUST GAS INPUT — The gas input to the unit is determined by measuring the gas flow at the meter or by measuring the manifold pressure. Measuring the gas flow at the meter is recommended for natural gas units. The man ifold pressure must be measured to determine the input of propane gas units.

Measure Gas Flow (Natural Gas Units) — Minor adjust ment to the gas flow can be made by changing the man ifold pressure. The manifold pressure must be maintained between 3.4 and 3.6 in. wg. If larger adjustments are required, change main burner orifices following the rec ommendations of national and local codes.

NOTE: All other appliances that use the same meter must be turned off when gas flow is measured at the meter.

Proceed as follows:

1. Turn off gas supply to unit.

2. Remove pipe plug on manifold (see Fig. 23), then con nect manometer at this point. Turn on gas to unit.

3. Record number of seconds for gas meter test dial to make one revolution.

4 Divide number of seconds in Step 3 into 3600 (number

of seconds in one hour).

5. Multiply result of Step 4 by the number of cu ft shown

for one revolution of test dial to obtain cu ft of gas flow per hour.

6. Multiply result of Step 5 by Btu heating value of gas to obtain total measured input in Btuh. Compare this value with heating input shown in Table 5. (Consult the local gas supplier if the heating value of gas is not known.)

EXAMPLE: Assume that the size of test dial is 1 cu ft, one revolution takes 30 seconds, and the heating value of the

gas is 1050 Btu/ft^. Proceed as follows:

1. 30 seconds to complete one revolution.

2. 3600 ^ 30 = 120.

3. 120 X 1 = 120 ft^ of gas flow/hr.

4. 120 X 1050 = 126,000 Btuh input.

If the desired gas input is 120,000 Btuh, only a minor

change in the manifold pressure is required.

Indicated Manifold Pressures

When a unit is converted to propane, different size orifices must be used. See separate natural-topropane conversion kit instructions.

tBased on aititudes from sea ievei to 2000 ft above sea ievei. For aititudes above 2000 ft, reduce input

I NC

NOTE: Unit sizes 018 and 060 are 48SS only.

NUMBER

UNIT 48SS,SX

018040, 024040, 030040 024060, 030060, 036060, 042060 030080, 036080, 042080,

048080, 060080 036100, 042100, 048100, 060100 036120, 042120, 048120, 060120 048140, 060140 3 40 130 4.0 130

rating 4% for each 1000 ft above sea ievei. In Canada, from 2000 ft above sea level to 4500 ft above sea level, derate the unit 10%.

ORIFICES

1 4.0 2

2 4.0 3

3 4.0 13.0

GAS SUPPLY PRESSURE

Min

4.0 130

4.0

Natural

(in. wg)

Max

13.0

Propane

Min Max

4.0

13.0

130

13.0

130

MANIFOLD PRESSURE

(in. wg)

Natural

Propane

3.5 3.5 32 40,000 41

3.5 3.5

3.5 35 32

3.5 3.5

3.5 3.5 32 35

3.5

NATURAL GAS PROPANE*

Orifice

Heating Drill Size

38 60,000 46 60,000

36 100,000

Input

(Btuh)t

80,000

120,000

136,000

Orifice

Heating Drill Size

42 44

42 40 136,000

Input

(Btuh)t

40,000

80,000

100,000 120,000

Page 23

CHECK BURNER ELAME - With burner access panel removed, observe the unit heating operation. Watch the burner flames to see if they are light blue and soft in appearance, and that the flames are approximately the same for each burner. See Fig. 24. Refer to Maintenance section for in formation on burner removal.

AIRFLOW AND TEMPERATURE RISE - The heating section for each size unit is designed and approved for heat ing operation within the temperature-rise range stamped on the unit rating plate.

BURNER FLAME

Fig. 23 — Burner Assembly

Observe manifold pressure and proceed as follows to ad

just gas input:

1. Remove cover screw over regulator adjustment screw on gas valve.

2. Turn regulator adjustment screw clockwise to increase gas input, or turn regulator adjustment screw counter clockwise to decrease input. Manifold pressure must be between 3.4 and 3.6 in. wg.

A WARNING

Unsafe operation of the unit may result if manifold pressure is outside this range. Personal injury or unit

damage may result.

3. Replace cover screw cap on gas valve.

4. Turn off gas supply to unit. Remove manometer from pressure tap and replace pipe plug on gas valve. Turn on gas to unit and check for leaks.

Measure Manifold Pressure (Propane Units') — The main burner orifices on a propane gas unit are sized for the unit rated input when the manifold pressure is 3.5 in. wg.

Proceed as follows to adjust gas input on a propane gas

unit:

1. Turn off gas to unit.

2. Remove pipe plug on manifold (see Fig. 23), then con nect manometer at this point.

3. Turn on gas to unit.

4. Remove cover screw over regulator adjustment screw on gas valve.

5. Adjust regulator adjustment screw for a manifold pres sure reading of 3.5 in. wg. Turn adjusting screw clock wise to increase manifold pressure, or turn adjusting screw counterclockwise to decrease manifold pressure.

6. Replace cover screw.

7. Turn off gas to unit. Remove manometer from pressure tap. Replace pipe plug on gas valve, then turn on gas to unit. Check for leaks.

Table 6 shows the approved temperature-rise range for each heating input, and the air delivery cfm at various tem perature rises The heating operation airflow must produce a temperature rise that falls within the approved range.

Refer to Maintenance section on page 39 to adjust heat ing airflow when required.

HEATING SEQUENCE OF OPERATION - See Fig. 25-30 and unit wiring label.

On a call for heating, terminal “W” of the thermostat is energized, starting the induced-draft motor. When the halleffect sensor on the induced-draft motor senses that it has reached the required speed, the burner sequence begins. The indoor-fan motor is energized 45 seconds after flame is established. When the thermostat is satisfied and “W” is deenergized, the burners stop firing and the indoor-fan mo tor shuts off after a 45-second time-off delay.

A LED (light-emitting diode) indicator is provided on the control board to monitor operation. The control board is lo cated by removing the burner access panel. During normal operation, the LED is continuously on. See chart below for error codes:

LED Indications

ERROR CODE

Normal Operation

Hardware Failure

Fan On/Off Delay Modified Limit Switch Fault Flame Sense Fault Five Consecutive Limit Switch Faults Ignition Lockout Fault Inducer Switch Fault Rollout Switch Fault Internal Control Fault

NOTES: 1 There is a 3-second pause between error code displays.

2 If more than one error code exists, all applicable error codes will

be displayed in numerical sequence

3 This chart is on the wiring diagram located inside the burner ac

cess panel.

LED INDICATION

1 Flash 2 Flashes 3 Flashes 4 Flashes 5 Flashes 6 Flashes 7 Flashes

8 Flashes

On Off

Page 24

MAXIMUM HIRE SIZE 2 AW6

230 VOLT OPERATION AS SHOWN. FOR 208 VOLT OPERATION REVERSE RED AND ORN

LEADS ON TRANSFORICR.

NOTES: 1 If any of the original wire furnished must be replaced, it must be replaced

2 Thermostat: HH07AT174, HH01AD040, HH01AD046 Subbase: HH93AZ040, 3 Use copper conductors only

with type 90 C wire or its equivalent. HH93AZ176

Blower Relay Contactor Capacitor Crankcase Heater Compressor Motor Combustion Relay Equipment Fuse Link Flame Sensor Fuse Ground Gas Valve Relay Hall Effect Sensor High-Voltage Transformer Ignitor Induced-Draft Motor Indoor-Fan Motor Integrated Gas Control Internal Protector Limit Switch Main Gas Valve

Fig. 25 — 208/230-1-60 Wiring Diagram, Units 48SS018-060

Outdoor-Fan Motor Power Quadruple Terminal Rollout Switch Transformer

Field Splice

Terminal (Marked) Terminal (Unmarked) Splice Splice (Marked)

Factory Wiring Field Control Wiring Field Power Wiring Accessory or Optional Wiring To Indicate Common Potential Only, Not to Represent Wiring

Page 25

^lEU)

_____

i~i_

MAXIMUM WIRE SIZE 2 AWG

230 VOLT OPERATION AS SHOWN. FOR 208

VOLT OPERATION REVERSE RED AM) ORN LEADS ON TRANSFORMER.

Sy£PU(

1 £.OtÆR__'fì_

GRN-YEL—

CH C036 i 042 ONLY)

GRN-YEL

----

1|>

^QF^-aW-VEL-

COWHESSOl

CEB

<H)

NOTES: 1 If any of the original wire furnished must be replaced, it must be replaced

with type 90 C wire or its equivalent

2 Thermostat: HH07AT174, HH01AD040, HH01AD046 Subbase: HH93AZ040,

HH93AZ176

3 Use copper conductors only

CAP l(oiaT^ CAP 2(oqt^

Fig. 26 — 208/230-3-60 Wiring Diagram, Units 48SS030-060

Blower Relay Contactor Capacitor Crankcase Heater Compressor Motor Combustion Relay

Equipment Fuse Link Flame Sensor Fuse

Ground

Gas Valve Relay Hall Effect Sensor High-Voltage Transformer Ignitor Induced-Draft Motor Indoor-Fan Motor Integrated Gas Control Internal Protector Limit Switch Main Gas Valve

Terminal (Marked) Terminal (Unmarked) Splice

Splice (Marked)

Factory Wiring Field Control Wiring

Field Power Wiring Accessory or Optional Wiring To Indicate Common Potential Only, Not to Represent Wiring

Page 26

MAXIMUM WIRE SUPPLY_ _ft_ —YEL SIZE 2 AWS < _

NOTES: 1 If any of the original wire furnished must be replaced, it must be replaced

with type 90 C wire or its equivalent

2 Thermostat: HH07AT174, HH01AD040, HH01AD046 Subbase: HH93AZ040,

HH93AZ176

3. Use copper conductors only

Fig. 27 — 460-3-60 Wiring Diagram, Units 48SS036-060

Blower Relay Contactor Capacitor Crankcase Heater Compressor Motor Combustion Relay

Equipment

Fuse Link

Flame Sensor

Fuse

Ground

Gas Valve Relay

Hall Effect Sensor

High-Voltage Transformer

Ignitor

Induced-Draft Motor

Indoor-Fan Motor

Integrated Gas Control

Internal Protector

Limit Switch

Main Gas Valve

Outdoor-Fan Motor Power Quadruple Terminal Rollout Switch Transformer

Field Splice

Terminal (Marked) Terminal (Unmarked) Splice Splice (Marked)

Factory Wiring Field Control Wiring

Field Power Wiring Accessory or Optional Wiring To Indicate Common Potential Only, Not to Represent Wiring

Page 27

MAXIMUM WIRE SIZE 2 AWG

230 VOLT OPERATION AS SHOWN FOR 208

VOLT OPERATION REVERSE RED AND ORN LEADS ON TRANSFORMER

YEL—( 0FM)-6ftN-YELn

BRN-VO' 1

COMPRESSOR

CAP 2 (®(D(D^ CAP i(oaT^

NOTES:

1. If any of the original wire furnished must be replaced, it must be replaced with type 90 C wire or its equivalent.

2 Thermostat: HH07AT174, HH01AD040, HH01AD046 Sub

base: HH93AZ040, HH93AZ176

3. Use copper conductors only.

Fig. 28 - 208/230-1-60 Wiring Diagram, Units 48SX024-048

American Wire Gage Blower Motor Blower Relay Contactor Capacitor Crankcase Heater Combustion Motor Compressor Motor Combustion Relay Compressor Time Delay Discharge Thermostat Equipment Fuse Link Flame Sensor Fuse Ground Gas Valve Relay Hall Effect Sensor High-Voltage Transformer Ignitor Induced-Draft Motor Indoor-Fan Motor Indoor-Fan On Integrated Gas Control Internal Protector Limit Switch

Main Gas Valve National Electrical Code Outdoor-Fan Motor Power Quadruple Terminal Rollout Switch Start Thermistor Transformer

Field Splice

Terminal (Marked) Terminal (Unmarked) Splice Splice (Marked)

Factory Wiring Field Control Wiring Field Power Wiring Accessory or Optional Wiring To Indicate Common Potential Only, Not to Represent Wiring

Page 28

MAXIMUM WIRE I

SIZE 2 AWG -kJ

BLU-

EQUIP GND

230 VOLT OPERATION AS SHOWN. FOR 208

VOLT OPERATION REVERSE RED AND ORN LEADS ON TRANSFORMER.

COOLING FAN LOGIC

T T+30 G

ENERGIZED

0 45 T T+30 W BR W BR

ENERGIZED ENERGIZED DE-ENERGIZED DE-ENERGIZED

DE-ENERGIZED

HEATING FAN LOGIC

________

\/-T-r-\ l"l rsrr

OFF

o o

SINGLE STAGE HEAT 8 SINGLE STAGE

COOL THERMOSTAT (TYP) COMMON

rcOMP AREA^ ¡DISCONNECT

L PER NEC I

COMP AREA

MAIN PWR

1 1

COMPONENT

ARRANGEMENT

MAIN

<2^ <S>

(O)

C©D

GAS SECTION

C@0 BLK “

BLK_/^

YEL—( 0FM)-6RN-YEL->

COMPRESSOR

(E>

CAP IIOCITO

m m

NOTES:

1 If any of the original wire furnished must be replaced, it must be

replaced with type 90 C wire or its equivalent

2 Thermostat: HH07AT174, HH01AD040, HH01AD046 Sub

base: HH93AZ040, HH93AZ176

3 Use copper conductors only

a>-vJ

[Z l]

CAP 2(001^

AWG

BM BR C CAP CH CM COMP CR CTD DT EQUIP FL FS FU GND GVR

[,^g

HVTRAN I IDM -

IFM

IFO

IGC

American Wire Gage

—

Blower Motor NEC — National Electrical Code

—

Blower Relay Contactor

—

Capacitor

—

Crankcase Heater

—

Combustion Motor

—

Compressor Motor Combustion Relay Compressor Time Delay

Discnarge Thermostat Equipment Fuse Link Fiame Sensor

Fuse Ground Gas Valve Relay

Hall Effect Sensor

High-Voltage Transformer

Ignitor

Induced-Draft Motor

Indoor-Fan Motor

Indoor-Fan On

Integrated Gas Control

Internal Protector

Limit Switch

MGV — Main Gas Valve

OFM — Outdoor-Fan Motor PWR — Power QT — Quadruple Terminal RS — Rollout Switch ST — Start Thermistor TRAN

— Transformer

Field Splice

<I>

Terminal (Marked) Terminal (Unmarked)

Splice Splice (Marked)

Factory Wiring Field Control Wiring Field Power Wiring Accessory or Optional Wiring

To Indicate Common Potential

Only, Not to Represent Wiring

Fig. 29 — 208/230-3-60 Wiring Diagram, Units 48SX036-048

Page 29

MAXIMUM WIRE SIZE 2 AWG ■<

GRN-YEL

-----

111

NOTES:

1 If any of the original wire furnished must be replaced, it must be

replaced with type 90 C wire or its equivaient

2 Thermostat: HH07AT174, HH01AD040, HH01AD046 Sub

base: HH93AZ040, HH93AZ176

3 Use copper conductors oniy

American Wire Gage

Biower Motor

Biower Reiay Contactor Capacitor Crankcase Heater Combustion Motor Compressor Motor Combustion Reiay Compressor Time Delay

Discharge Thermostat

Equipment

Fuse Link

Flame Sensor

Fuse

Ground

Gas Valve Relay

Hall Eftect Sensor

High-Voltage Transformer

Ignitor

Induced-Draft Motor

Indoor-Fan Motor

Indoor-Fan Cn

Integrated Gas Control

Internal Protector

Limit Switch

Main Gas Valve

National Electrical Code

Cutdoor-Fan Motor

Power

Ouadruple Terminal

Rollout Switch Start Thermistor Transformer

Field Splice

Terminal (Marked) Terminal (Unmarked)

Splice

Splice (Marked)

Factory Wiring

Field Control Wiring

Field Power Wiring Accessory or Optional Wiring To Indicate Common Potential

Only, Not to Represent Wiring

Fig. 30 - 460-3-60 Wiring Diagram, Units 48SX036-048

Page 30

Start Up Cooling Section and Make Adjustments

A CAUTION

Complete the required procedures given in the Pre-

Start-Up section on page 21 before starting the unit.

Do not jumper any safety devices when operating the unit.

Do not operate the compressor when the outdoor tem perature 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 OFE posi tion. Observe that blower motor starts when FAN switch is placed in ON position and shuts down when FAN switch is placed in AUTO, position.

2. Place SYSTEM switch in COOL position and FAN switch in AUTO, position. Set cooling control below room tem perature. Observe that compressor, condenser fan, and evaporator blower motors start. Observe that cooling cycle shuts down when control setting is satisfied. The indoor fan will continue to run for 30 seconds.

3. When using an auto.-changeover room thermostat, place both SYSTEM and FAN switches in AUTO, positions. Observe that unit operates in heating mode when tem perature control is set to “call for heating” (above room temperature) and operates in cooling mode when tem perature control is set to “call for cooling” (below room temperature).

IMPORTANT: Scroll compressors in units 48SS048,060 and 48SX036-048 are direction-oriented. Three-phase units must be checked to ensure proper compressor 3-phase power lead orientation. If not cor rected 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 turn ing backwards, scroll compressors emit elevated noise levels, and the difference between compressor suc tion and discharge pressures may be dramatically lower than normal.

CHECKING AND ADJUSTING REFRIGERANT CHARGE

— The refrigerant system is fully charged with R-22 refrig

erant, 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 inside of the compressor access door. The label includes a “Superheat Charging Table” and a “Required Suction-Tube (F) Temperature” chart.

An accurate superheat, thermocouple-, or thermistortype thermometer, a sling psychrometer, and a gage mani fold 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.

A CAUTION

When evaluating the refrigerant charge, an indicated adjustment to the specified factory charge must always be very minimal. If a substantial adjustment is indi cated, 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 serv ice 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). c. Suction-tube temperature (F) at low-side service

fitting.

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

5. Using “Superheat Charging Table,” compare outdoorair temperature (F db) with evaporator inlet-air temper ature (F wb) to determine desired system operating superheat temperature. See Tables 7A-7G and 8A-8E.

6. Using “Required Suction-Tube (F) Temperature” table, compare desired superheat temperature with suc tion (low-side) operating pressure (psig) to determine proper suction-tube temperature. See Table 9.

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 sec tion on page 21.

INDOOR AIRFLOW AND AIRFLOW ADJUSTMENTS

A CAUTION

For cooling operation, the recommended airflow is 350

to 450 cfm for each 12,000 Btuh of rated cooling ca

pacity. For heating operation, the airflow must pro

duce a temperature rise that falls within the range stamped on the unit rating plate.

Table 6 shows the temperature rise at various airflow rates.

Tables 10-13 show both heating and cooling airflows at var

ious external static pressures. Refer to these tables to de termine the airflow for the system being installed. See Table 14 for wet coil pressure drop.

NOTE: Be sure that all supply- and return-air grilles are open, free from obstructions, and adjusted properly.

A WARNING

Shut off gas supply then disconnect electrical power to the unit before changing blower speed. Electrical shock can cause personal injury or death.

Page 31

Airflow can be changed by changing the lead connec

tions of the blower motor.

Unit 48SS two- or 3-speed motors (except size 030) are factory wired for low speed operation. Unit 48SS030 is fac tory wired for medium speed. Units 488X024,036, and 048 two- or 3-speed motors are factory wired for low speed; units 488X030 and 042 are factory wired for medium speed.

For 208/230-v and A.O. 8mith 460-v Blower Motors — The motor leads are color-coded as follows:

3-8PEED

black = high speed

blue = medium speed

2-8PEED

black = high speed

red

low speed

red = low speed

To change the speed of the blower motor, remove the fan motor speed leg lead from the blower relay (BR). This wire is attached to terminal BM for single-phase and 3-phase units. To change the speed, remove and replace with lead for de sired blower motor speed. Insulate the removed lead to avoid

contact with chassis parts.

Table 6 - Air Delivery (Cfm) at Indicated Temperature Rise and Rated Heating Input

For 460-v GE Motors

The motor leads are color coded

as follows:

3-8PEED

black = high blue = jumper orange = medium

2-8PEED

black = high blue = jumper red = low

red = low

To change the speed of the blower motor, remove fan motor speed lead from the blower relay (BR) and replace with the lead for the desired blower motor speed. The mo tor 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 terminal BM of BR.

To select high speed on 460-v GE motors, separate the black

(female QC) from the blue lead (male QC) and connect the black lead to the BR. Insulate the blue lead to avoid con

tact with any chassis parts.

HEATING

(Btuh)

40,000 1389 60,000 2083 1667 1389 1190 80,000 2778

100,000 3472 2778 2315 1984 120,000 140,000

NOTE: Dashed areas do not fall within the approved temperature rise range of the unit.

20 25 30 35

1111 926 794

2222 1852 1587

4167 3333 2778 5037

4029 3358 2878

2381 2083 1852 1667

40 45 50

694 617 1042 926 1389 1235 1111 1010 926 855 794 1736 1543 1389 1263 1157

2518 2238

TEMPERATURE RISE °F

55 60 65 70

556 833 758

2014

- — — - —

1515 1389 1282 1831 1679

— — —

1068 992 926

1549 1439

1190

75 80 85 90

—

— —

—

1111 1343 1259 1185 1119

— —

868

1042

—

— —

980 926

Page 32

TEMP (F)

Airi CIN 1

COND

SPH 17.3

SPH 13.8

100 SPH 105 110 SPH 115

SPH 10.2

80 SPH

SPH 6.1

SPH

8.2

* *

56 58 60 62

18.5

14.9 16 1 17.3 20.7 24.1

11.4 12 5 13.7 17 1 20.6

LEGEND

Ewb — Entering Wet Bulb

SPH — Superheat at Compressor (F)

TEMP (F)

AIR ENT

56 58 60 62 64

16.2

14.7

10.9

8.4

7.5

6.6

65 70 75 80 85 90 95

100

SPH SPH SPH 16.0 SPH SPH SPH 11.1 SPH SPH 73

105 SPH 110 115

SPH

18.2 190

17 1 17.6

14.8

13.7 13.3

8.5

6.2

LEGEND

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

Table 7A — Superheat Charging Table, 48SS018

EVAP AIR - CFM

600

Evap Air — Ewb (F

64 66 68 70

19.6

20.8

24.2 27.7

28.5 29.3 29.3 25 7 27.3 27.3

22.9 25.2 25.2 88 62

* it *

it * A it

9.5 10.2

6.5 *

6.6 10.0 13.5

5.0 *

it ii

13.6 17.0

8.1

11.4 15.2 19.0

6.2 9.4 13.2 17.0 18.5 73

5.3 9.1

20.1 23.1 23 9 24.1 25.4 26.1

17.3 21 1 22.6 24.1

11.1 149

6.7

*Do not attempt to charge system under these conditions — refrig

erant slugging may occur.

Table 7B — Superheat Charging Table, 48SS024

EVAP AIR - CFM

800

Evap Air — Ewb (F)

66 68 70

19.9 20.7 22.5 24.2 25.1

18.1

16.4

18.6

16.6 18.3 20.1 21.0

14.6 14 5

12.9 12.5 14.3 16.0

10.7

8.4

7.7 69 7.3 7.6 7.8 10.2

* *

10.4 12.2 13.9 16.3 84

7.9 8.9 9.9

* *

20.4 22 1

16.3

10.1

18.0

11.9 14.3

5.5 5.8 8.1 *

*Do not attempt to charge system under these conditions — refrig

erant slugging may occur.

23.0

19.7 21.3 22.4 184

122

6.1

29.3

27.3

25.2

27.1

23.0

24.0

24.9

22.8

20.8

28.6

20.5

17.2

129

15.9

10.8 138

8.8 11.8

25.9

26.6 27.2 27.9

72 74

29.3

27.3 27 3

25.2 25.2

25.6

22.0 23.5 25.0 20 0

21 5

19.5 21.7

18.9 21.9

16.8 19.8

14.8 17.8

72 74

23.9 24 9 26 0 27.1 28 1

21.8 23.3

20.7

18.7

21 5

19.9

16.6 18.2

14.6

166 18.6 20.6 22.6

12.5 14.9

10.5

13.3 16.1 18.9

8.4 11 6

24 8

23.5 24.6 22 3 23 1

21.0

19.8 21.4

173

14.9 18.1 21.3

26.2 27.7

25.8

23.8

22.2 23 4

23.0

19.7

22.1

21.7

TEMP (F)

AIR ENT

SPH 14.2 SPH 13.6 SPH 13.0

80 SPH 10.9

SPH 8.9

90 SPH

95 100 105 110 115

SPH SPH 7.3 SPH

SPH SPH

LEGEND

Ewb — Entering Wet Bulb

- Superheat at Compressor (F)

15.1 16.1 17.1

14.1

13.0 110

8.3

7.8 78

6.7 6.7 *

Table 7C — Superheat Charging Table, 48SS030

EVAP AIR - CFM

1000

Evap Air — Ewb (F)

8.9

8.4

7.3

14.6

15.0 17.1

130 13.0 15.1 17.2 19.2

11.0

10.9

8.9 8.9 12.0 15.1 18.2 84

8.3 10.9 13.6 16.2

78 78 9.9 12.0

7.3 67

* *

7.3 93

6.7 88 10.9 13.0

* *

62 64 66

19.2

•21.3 23.3

19.2

21.3

13 6 16.1 187 20.1

14.1 16.1 18.2 20.2 20.9 21.7

11 4

136

6.7 8.9 10.9

6.8 8.9

*Do not attempt to charge system under these conditions — refrig

erant slugging may occur.

68 70

24.7

25.9 27.2 27 8 28.5

22 8 24.2 25 7

20.9 22.6 24 2

21.4 192 177

15.6

15.0

20 2 21.2 22 4 23.5

19.2

176 19.7

17.1

72 74

26.3

24.8

22.7 23.6

20 8

21.6 22.5

20 2 20.7

19.1

19.4 19.8

13.0 15.0 17.1 18.0

10.9 13.0

15.0

165 18.0

26.9

25.4 24 4

18.9

Page 33

Table 7D — Superheat Charging Table, 48SS036

TEMP (F)

AIR ENT

SPH 84 8.4 84 84 SPH 50 5.0 5.0 5.0 90 SPH SPH SPH SPH SPH SPH SPH SPH SPH

LEGEND

— Entering Wet Bulb — Superheat at Compressor (F)

Ewb SPH

65 70 75 80 85 90

95 100 105 110 115

56 58 60 62 64

★ * * *

* *

* * * * * *

* *

* * *

* *

* * *

* * * *

12.5 16.7 18.7 20.7 * *

* * * *

* *

5.4

* * * *

* * * •*

EVAP AIR - CFM

1200

Evap Air — Ewb (F)

66 68

13.1 15.9 186

9.6 13 1

6.0

103 14.5

75 125

5.4 * *

* *

*Do not attempt to charge system under these conditions — refrig

erant slugging may occur

Table 7E — Superheat Charging Table, 48SS042

TEMP (F)

COND

65 70 75 80 SPH 22.5 22.5 22.5 23.7 85 90

95 100 105 110 SPH 17.8 17.8 178 18.4 19.1 19.7 21.2 22.7 115

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

SPH 27.2 27.2 27.2 SPH 25 1 25.1 25.1 SPH

SPH SPH SPH SPH 20.3 20 3 20.3 21 0 21.7 SPH 19.8 19.8 19.8

SPH

LEGEND

54 56

23 1

22 0

21.5

20.9 20 9 20.9 21.6 22.2

15.7 15.7

23.1

22.0

21.5

58 60 62 64

28.9 30.5 32.2 32.5 32.9 33.2

26.8 28.5 30.1 30.8 31 5 32.2

23.1 24.8 26.4

22.0 22.7 23.3 24.0 25.7 27.5

21.5 22.1 22.8 23.4

20 5

157 164 170 17.7

EVAP AIR - CFM

Evap Air — Ewb (F

28 1 29.1

24.9

21.1

1400

66 68 70 72 74

26 0 27 4

25 0

22.9 24 3 25.8 27.2

22.3 23 6 24.9 26 2

21.8 22.9 24.1

19.5

22.0 23.4

20.0

166

10.4

8.4

6.4 *

* *

30 2

28.8 30.2

26.6

21.4

17.9

15.9

13.9 15.2

12.5

11.3 14 1 10 0

8.7

9.3

100 11.9

31.2

29 2 29.1 28.9

28.2 28 2

25 2 25.4

24.2 24 6 23 2

72 74

24.8 26.1

21.3 22 7

19.3

17.3 18.6 20 0

146 168 18.8

135 17.1 20.7

13.0 17.3 21 7

12.4 15.6 187

33 2 33 2 33.2

32.0

30.9 30 6 30.3

30.0 29 8 29.5

27.3 27 3 27.3 26 3 26 5 26.6

23 7 24.2

20 6 22.0

16.5

17.0 19.8

13.8 158

31.9 31.7

28 1 28.1

25 6 25.9 24 9 25.3

24.0

179

28 8

24.8

TEMP (F)

COND

65 70 75 80 85 90

95 100 105 110 115

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

SPH 190 SPH 15.4 SPH 11.9 SPH 8.4 SPH 5.0 50 5.0 5.0 7.5 10.1 11.8 SPH SPH SPH SPH SPH SPH

LEGEND

54 56 58 60 62 64

* * *

* *

Table 7F — Superheat Charging Table, 48SS048

EVAP AIR - CFM

1600

Evap Air — Ewb (F

19.0 19.0

15.4 15.4

11.9

8.4 8.4 8.4 * * * *

* *

•*

11.9 11.9 14.6 17.2

* * * *

* *

* * *

19.0

15.4 18.1 20.8 22 5 24.1

* * *

21.7

11.0 137 15.4

* * * * * * ★ * * * * * *

24 3

26.0

18.9 20.6

*Do not attempt to charge system under these conditions — refrig

erant slugging may occur.

9.0

6.2 9.4 *

68 70 72

27.7

17.0 19.5 22 0

13.5 16.7

11.4

7.3

27.9

25.1

22.3 24.0 25.8

14.7

12.6 106 13.8

53 8.5

5.3 10.6 160

28 2 28.4

26.1 27.1

24.5

20 0 23.2 26 4

17.9 21.1 24.4

15.9 19 1 22.3

17.0 20 3

11 8 15.0 18.2

11.2

155 19.8

28.6

28.1 27 5

27.0

21.3

Page 34

Table 7G — Superheat Charging Table, 48SS060

EVAP AIR - CFM

AIR ENT

65 70 75 80 85 90

95 100 105 110 115

COND

SPH 20 1 SPH SPH 13.0 SPH 10.9

SPH SPH 6.9

SPH 5.0 SPH SPH SPH SPH

54 56

16 5

* *

20.1

16.5

13.0

10.9

8.9 69

5.0

LEGEND

Ewb — Entering Wet Bulb

SPH — Superheat at Compressor (F)

TEMP (F)

Airt Cr * 1

65 70 75 80 85 90

95 100 105 110

115

COND

SPH 22.1 SPH SPH 150 SPH 92 SPH SPH SPH SPH SPH SPH SPH

18.5

22.1

18.9

15.4

9.5

LEGEND

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

Evap Air — Ewb (F

20.1

16.5

13.0 109

8.9

20.1 165 17.3 18.0 20.6

13.0

10.9

8.9

69 6.9 8.4 9.9

5.0

* *

20.1

14.5

12.4 104

6.3 * *

64 66

20 1

16.0

13.9 11 9

22.6

18.5

16.5 19.0 20 6 22.2 144 17.0

12.4 14.9

7.8

10.3

5.8 8.3 *

* *

*Do not attempt to charge system under these conditions — refrig

erant slugging may occur

62 8.8

Table 8A - Superheat Charging Table, 48SX024

EVAP AIR - CFM

800

Evap Air — Ewb (F

22.8 23.2 25 3 27.4 29.5

19.3

15.7

* *

9.7 *

19.6

16.1

9.9 *

* *

22.2

19.2

14.4

64 66

24.8

22.3

18.9

96 15.5

7.2 12.5 178

9.4 14.2 7 1 106 14.5

* *

*Do not attempt to charge system under these conditions — refrig

erant slugging may occur.

27.5 28 3 29.1 30.0 25 4 23 3 21 3 22.6

7.1

25 2

23.1

21.1

25.6 26.1

24.0

22.3 23.5 24.7

189 20 9 22.9 24 9

17.3 196 22 0 24.3

12.9

10.8

15.6 18.3

13.9 17.0 123 15.7 192

6.7

10.6 14.4 89 13 1

68 70 72

29.8

26.7

24.7

30.2 30.5

28.1

26.0 27.3 27.4 24 0

20.1 22 4 175

20 9 24.2 24.2 24.2

18.3

11.4 84

15.8 20.1 21.6 23.1

13.2 18.0 19.5 21.0

53 107 16.0

26 6 27.0

24.8

25.6 26.5

25.9

23.8

21 1

25 4

23 8

20.1 23.2

22.7

183

22.2

17.4 21 6

74 76

32.1

30.0

29.4

31.3

30.0 28 7 28.0

27.4

25 3

26 1

26.8

24 8 25.1 25.5

22.1

22.9

17.5

23 6

19.0

TEMP (F)

AIR ENT

54 56 65 70

75 80 85 90

95 100 105 110 115

SPH 11.2 SPH 7.6 SPH SPH SPH

SPH SPH SPH SPH

SPH

* *

LEGEND

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

Table 8B — Superheat Charging Table, 48SX030

EVAP AIR - CFM

1000

Evap Air — Ewb (F)

58 60

11.2

7.7 77 7.7 12.1

•*

11.2

* * *

11.2 14.9 18.6 22.3 *

* *

• 64 66

16.6

9.4 147

8.5 13.5 18.5 76

ttr

12.3

10.0

7.7 11.5

*Do not attempt to charge system under these conditions — refrig

erant slugging may occur.

21.1 20 0

17.0

14.2

5.7 99

68 70 72 74 76

22.4 21 6

20.7

19.3

18.0

16.0

14 1

22.5 22.7

22.9

22.0 22 4 22 5 22 5 21 4 22.1 22.1 20 2 21.0 21.6

18.9 19.9

21 1

17.8 19.6 20.7 21.8

16.7 192 20.2 21 2

14.0

18.2

194 20 6

11.4 17.1 18.6 20.1

8.9 13.5

10.0 13.0 16.0

158

23.1

22.0

22.1

22.3

18.0

Page 35

TEMP (F)

AIR ENT

54 56 58

65 70 75 80 85 90

95 100 105 110 115

SPH 21.3 21.3 SPH 19.3 19.3 193 SPH

17.2 172 17.2

SPH 13.6 13.6 13.6 13.6 15.1 166 SPH 10.1 10 1 10 1 SPH 6.5 6.5 SPH SPH SPH SPH SPH

* * * *

LEGEND

Ewb — Entering Wet Bulb

SPH — Superheat at Compressor (F)

TEMP (F)

AIR ENT

54 56 58 60 65 70 75 80 85 90 95

100 105 110 115

SPH 23 9 SPH 21.9 21.9 SPH 198 19.8 198 19.8 20 3 20 8 SPH 16.3 163 16.3 163 17.9 19.6 21.3 SPH

12 7 12.7 127 12 7 15.6 18.4 21 3 21 3

SPH 9.2 SPH 56 5.6 5.6 56 8.5 11.3 14.2 16.2 182 20.2 20.2 SPH SPH SPH SPH

* *

23 9 23.9

9.2 92

* *

LEGEND

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

Table 8C — Superheat Charging Table, 48SX036

EVAP AIR - CFM

1200

Evap Air — Ewb (F

62 64

20.2 21 2 197

23.3 22 2 21 0

21 3

21.3 22.0 22.6 193

17.2 18.5

18.0

11.7 134

60 90

15 0 15.8 135 120 13.4

60 8.7 11 4 14 1

*Do not attempt to charge system under these conditions — refrig

erant slugging may occur

6.5

* * ★

* *

10.1

6.5 8.8 11.2

* *

Table 8D — Superheat Charging Table, 48SX042

EVAP AIR - CFM

1400

Evap Air — Ewb (F)

21 9

k k *

62 64

23.9

21.9

9.2 12.0 *

* * k k k k

24.4 24 9 25 5 25 8 26.1 26 5 25.6 24 7

22.4 22 9

14 9

k k *

80 106 13 1 156

* *

*Do not attempt to charge system under these conditions — refrig

66 68 70 72

23 4 23 7 21 3 21 7 22 0

178

7 1

erant slugging may occur.

68 70 72 74

23 5 23.7

23.8 23.3

22 8

22.3 22 5 22.6 22.0 21.5

21 1

18.5

14.6 157

‘k

* *

21.3 21.4 20.7

18.9 19.3 165

173 168

148

162 16.2 16.2

19.4

18.1 19.0

17.2 17.6

14.9 15.6

8.0 12 1 13.6 15.1

10.0 11.5 13.0

8.0

9.5 11.0

24.1

24 5 24 0 23.5

20 1

19.5

22 4 22.4 22 4

21 5

187

21.7

21.3

21.8 21 3 21 3 21 3

21 8 21 8

19.7 20.8 20.8

20 8 20 2

18.1 18.9 19.6

10 1 13.1 16.1 17.6 19 1

70 105

8.0 12.0 13.5 15.0

14.0

15.5

170

TEMP (F)

AIR ENT

54 56 58

70 75 80 85 90

95 100 105 110 115

SPH SPH 25 0 SPH 22 8 SPH 20 6 SPH 18.3 SPH 133 SPH SPH SPH SPH SPH

27 2 27.2

* *

LEGEND

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

Table 8E — Superheat Charging Table, 48SX048

EVAP AIR - CFM

1600

Evap Air — Ewb (F)

27.2

27.2 27.0 26.7 26.5 26.0

25.0 25.0 25.0 24.8 24 6 24.5 24.5 22 8

22 8

22.8 22.7 22 5 22.4 22 9

20 6 20.6 20.6 20.5 20 4

183

18.3

133 13.3 13.3

82 8.2 8.2 10.2 12 2 142 157 * *

* k k

* *

62 64

18.3 18.3

14.2 152

6.3 84

* * * * *

66 68 70 72 74

20.3

21.4 183 19.8 21.4 163 178 19 3

106 12 9 15.2 17.5 18.1 18 7

7 1

*Do not attempt to charge system under these conditions — refrig

erant slugging may occur.

10 1 13.1 16.1 17.1

7 1

25.6 25 1 24 5 24.0

24.5 24 6 23.8

23.5 24.0

23.1

22.2

22.4 23.5 22 4 21.4

22.9

21 8

20.6

20.9 20 4 19.9

17.3 18.8 19.0 19.2

18 2

10.5 14.0 15.3 16.6 8 0

12.0

13 5

150

Page 36

Table 9 — Required Suction-Tube Temperature (F)*

TEMP (F)

0 2 4 6

8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40

‘Temperature at suction service vaive

61.5

35 37 39 41 43 45 47 49 51 53 55 57 59 59 61 63 65 67 69 71

73 75

64.2 67.1 70.0 73.0

37 39 41 43 45 41 43 45 47 49 45 47 49 47 49 51 53 49 51 51 53 55 57 59 55 57 57 59 61 63

61 63 65 63 65 67 69 65 67 69 71 73 67 69 69 71 73 75 73 75 77 79

77 79 81 83

43 45

53 55

75 77 79 81

71 73 75

47 49

51 53

55 57 59 61 63

61 63

65 67 69

75 77 79 81 83

81 83

76.0 79.2 82.4 85.7

45 47 49 51 53

51 53 55

55 57 59 61 63

61 63 65

65 67 69 71 73

71 73 75 77

77 79 81 83

55 57 59 57

65 67 69 67

75 77 79 77

83 85 85 87 89 87

49 51

73 75

79 81

89 91

55 57

65 67

Table 10 — Dry-Coil Air Delivery* — Horizontal Discharge at 230 and 460 V - Unit 48SS

(Deduct 10% from Cfm and Watts for 208 V Operation)

UNIT

48SS

018

024,

030

036

042

048

060

‘Air deiivery values are without air filter and are for dry coil. See Table 14 for wet coil pressure drop. Deduct field-supplied air filter pressure drop

and wet coil pressure drop to obtain external static pressure available for ducting.

tUnit air delivery is outside of operating range. 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. Evaporator-coil 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.

MOTOR

SPEED

Low

High

Low

Med

High

Low

Med

High

Low

High

Low

High

Low

Med

High

AIR

DELIVERY

Watts Cfm Watts Cfm Watts Cfm Watts Cfm Watts Cfm Watts Cfm Watts Cfm Watts Cfm Watts Cfm Watts

Cfm

Watts

Cfm

Watts

Cfm

Watts

Cfm

Watts

Cfm

Watts

Cfm

0.0 0.1

230 225 760 745 725 695 640 540

t t t t t t t

275 275 857 835 802 371 368 360 349

1079 1063

514

1409 1383 1324

473 447 427 418

1253 1253

519

1414

667

1734

678 635 604 580 550 520

1540 1515 1475 1430

1000 991 970 925 2125 1355 2480 2440 2388 2330

1366 1287

1639 1563

1825

t t t t t t t t t t

2110 2085

1315

t t t t

1027 996 978 919

493

1172 1130 1047 946

500 478

634 609 593

820 785

1750

. 2026

1265

1435 2509

EXTERNAL STATIC PRESSURE (In. wg)

0.2 0.3 0.4 0.5 0.6

220

273

476 460 443 425

854 786

210 195 170

270

269 260 257 249 782

1282

459 439 410

1234 1162 1074 920 829 743

1461 1370

750 700 680

1685 1610 1525

1905 1830 1752 1603 1513

905 846

2025 1905 1830

2040 2009 1960

1212

1375 1310 1265 2450 2386 2310

850

745 345 326 319

1223

395 367

564 541

1375 1280 1225 1128 1020

744 706

904 875 849 830 819

1158 1103 2266 2198

235 200 700 450

717 663

865 783 401 378 344

1156 1068 984 857

346 337 865 829 377 357 340

506 469 436 422

1292

824 804 748 683

1157

493 455 430

649 612 570

1485 1355 1215

641

1752

1900 1845 1775 1045 2125 1175 1108 1010 915 2235 2160 2083 1888

0.7

t t t t t t t t t

t t t

304

960 829 743

606

1603 1398

987

2050

0.8

t t t t t t t t t

293 726

323 768

557 511

1367 1228

925 880

1968 1890

0.9 1.0

t t t t t t t t t t t t t t t t t t

t t t t t t t

637

1228

t t t

t t

t t t t t

Page 37

Table 11 — Dry-Coil Air Delivery^ — Downflow Discharge at 230 and 460 V — Unit 48SS

(Deduct 10% from Cfm and Watts for 208 V Operation)

UNIT

48SS

018

024,

030

036

042

048

060

MOTOR

SPEED

Low

High

Low

Med

High

Low

Med

High

Low

High

Low

High

Low

Med

High

AIR

DELIVERY

Watts Cfm Watts 401 376 Cfm Watts Cfm Watts Cfm Watts Cfm Watts Cfm

Watt Cfm Watts Cfm Watts Cfm Watts Cfm Watts Cfm Watts Cfm Watts Cfm Watts Cfm Watts Cfm

0.0 0.1 0.2 0.3 0.4

t t

1334

t t t t t t t t t t t t t t t t t t t t t t t t t t

EXTERNAL STATIC PRESSURE (in. wg)

0.5

295 251 223 201 176 821

1253 1128

285 284 282 278 274 798 761 378

1011

520 511 487 472

1342 1309 1237 1181

460 439 423

1191 1136 1081 1005 907

511

1316 1244 1178 1104

655 631 603 584 552

1541

637 612 587

1500

790 750 700

1750 1675

847 784 746

1995 1901 1822 1730 1580 1477

970

2075

1291 1247 1195 1130 1076 1025

2395 2348 2291 2230

1490 1400

2530 2475 2420 2355 2289 2223

817 346

371

982 948

492

1458 1367 1292 1178

1450

909

2018 1896

952

2054 2024 1994 1945

753 665 536 322 294 272 996 816

727 368 362 357

470 450 420 392 364

1405

1604

852

928 905 880

1312

658

682 634

906 858

451

1106 1007

398 379 349 322

1005 891 784 657 535

560 526 493 455

1350 1290 1200 1105

679

1509

708

820 801 751 687

1814

1270

639 608 574 547

1421

646

1729

2164 1219 1161 1104

0.6

149 343 250

461

270

581

343 332 771 431 411

795 687 579 471

522 492 459 433 398

1053 920

1323 1221 1094

609 563 516

1582

847 804

1890 1830

2099 2022 1950 1827 1804

0.7 0.8

124 164 229 219 246 167 261 251 244 230 525

703 597 492

892 745

1319

1380 1270

970

2150

450 371 315 301

385 362

297 270 246

332 308 275

806 662

t t t t

1178

639

760

1762

921

1045 985 930

2075

0.9 1.0

t t t t t t

t t t t

610

t t t t t t t t t t t t t t t t

833 810

2008

304 283 387 341 471

349

389

509

1932

Table 12 — Dry-Coil Air Delivery* — Horizontal Discharge at 230 and 460 V — Unit 48SX

(Deduct 10% from Cfm and Watts for 208 V Operation)

UNIT

48SX

024, 030

036

042

048

*Air delivery values are without air fiiter and are for dry coil. See Table 14 for wet coil pressure drop. Deduct field-supplied air filter pressure drop

and wet coil pressure drop to obtain external static pressure available for ducting

tUnit air delivery is outside of operating range.

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. Evaporator-coil 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.

MOTOR

SPEED

Low

Med

High

Low

Med

High

Low

Med

High

Low

High

AIR

DELIVERY

Watts 280 275 265 255 Cfm Watts

Cfm 1025

Watts

Cfm

Watts 520 495 474 458 445 425

Cfm 1375 1335 1290 1240 1200 1140

Watts

Cfm 1520 1490

Watts

Cfm

Watts 490 480 470 460 450 430

Cfm 1400 1380 1340

Watts 590 580 560 545 525 505

Cfm

Watts

Cfm

Watts 1050

Cfm

Watts

Cfm

0.0

820 810 755 700 660 600 560 365

575

1600

1850 1830 1800

0.1

360 350 345 340 330 320 310

1010 t t t

560 535 510 480 460 440

t t t t t

1560 t t t t t t t

1000 970 930 870 810 750

t t t

t t

LEGEND AND NOTES FOR TABLES 11 AND 12

0.2 0.3 0.4

975

t t t

490 480 470 460 445

1300 1255 1200 1150 1080 1005 915

1450 1400 1380 1300 1200 1080

1540 1470

EXTERNAL STATIC PRESSURE (in. wg)

0.5 0.6 0.7 0.8 0.9

250

940 900 850 800 720 630

650 614 575

1560 1500 1380

1300 1250 1200 1140

1430 1360 1300 1220

t t

1785 1050 1000 930 870 810 2000 1940 1850 1750 1635

1750 1700 1640 1500

245

700 670

1780 1670

240

t t

410 390

480 450 420

t t t t t

430 410 390 380

t t t t t t t t

425

540 510 480

1280 1170 1060

1070

640 600

1600 1480

680

t t t

300

t t t t

t t t t t

1120

600

1330

740 665

1500

t t t t

790 620

t t

t t t t

560 500

1340

1300

1100 t t

1.0

t t t

t t t t

Page 38

Table 13 — Dry-Coil Air Delivery* — Downflow Discharge at 230 and 460 V — Unit 48SX

(Deduct 10% from Cfm and Watts for 208 V Operation)

UNIT

48SX

024, 030

036

042

048

*Air delivery values are without air filter and are for dry coil See Table 14 for wet coil pressure drop. Deduct field-supplied air filter pressure drop

and wet coil pressure drop to obtain external static pressure available for ducting.

tUnit air delivery is outside of operating range. 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 Evaporator-coil 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.

MOTOR

SPEED

Low

Med

High

Low

Med

High

Low

Med

High

Low

High

AIR

DELIVERY

Watts 280 275

Cfm 820 810

Watts

Cfm

Watts

Cfm

Watts 520

Cfm

Watts

Cfm

Watts

Cfm

Watts

Cfm

Watts

Cfm 1600 1560

Watts

Cfm

Watts 1050 1000 970 930

Cfm 1850

Watts

Cfm

0.0 0.1

365 360

1025 1010

t t t t

1375 1335

575 560

1520 1490

t t t t

490 480

1400 1380

590 580

t t t

t t t t t t

495

t t

1830

0.2 0.3

265 755 700 350 975 490

1300 1255

474 458

1290

535 510

1450 1400

470 460

1340

560

1540

1800

EXTERNAL STATIC PRESSURE (in. wg)

0.4

255

345 940 480

1240

1300 1250

545

1470

1785 1750 1050 2000 1940

250 660 340

900

470 460 445 430

1200 1150 1080

445

1200

480

1380

t t

650 614

1560

450

525

1430

870

1000

t t

0.5

245 240 600 330 850

425

1140

460

1300

1500

430

1200

505 480 450

1360 1300

700

1780

810

1700

930

1850

0.6 0.7

560 320 310 800 720

t t t t

440 425

1200 1080

575

1380

410 390

1140 1070

670 640

1670 1600

750 680

1640 1500

870 810

1750

t t

1005

540

1280 1170 1060

1220

1635

0.8

t t t t t t

300 630 410 390 915 790 620

t t t t t t t

510

420

1120

600 560 500

1480

600

1330

740

1500

t t

0.9

t t t

t t t t

480

t t t t t t t

1340 1100

t t t t

665

1300

1.0

380

t t

Table 14 — Wet Coil Pressure Drop

UNIT SIZE

018*

024

030

036

042

048 1600 0.075

060*

‘Unit 48SS only.

AIRFLOW

(cfm)

600 0.069 700 800 900

600 0.039 700 800 900

900 1000 1200

1000 1200 1400 1600

1000 ■; 0 048 1200 0.069 1400 1600

1400 0.068 1800

1700 1900 2100 2300

PRESSURE DROP

(in. wg)

0 082

0102 0116

0.058

0.075

0.088

0.095

0.123

0.068

0.088

0.108 0123

0.088

0.102

0.088

0.082

0.095

0.108

0.123

Page 39

COOLING SEQUENCE OE OPERATION — With the room thermostat SYSTEM switch in the COOL position and the FAN switch in the AUTO, position, the cooling sequence of operation is as follows:

When the room temperature rises to a point that is slightly above the cooling control setting of the thermostat, the ther mostat completes the circuit between thermostat terminal R to terminals Y and G. These completed circuits through the thermostat connect contactor coil (C) (through unit wire Y) and blower relay coil (BR) (through unit wire G) across the 24-v secondary of transformer (TRAN)

The normally-open contacts of energized contactor (C) close and complete the circuit through compressor motor (COMP) to condenser (outdoor) fan motor (OEM). Both motors start instantly.

The set of normally-open contacts of energized relay BR close and complete the circuit through evaporator blower (indoor) fan motor (IFM). The blower motor starts instantly.

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

The cooling cycle remains “on” until the room temper ature drops to point that is slightly below the cooling control setting of the room thermostat. At this point, the thermostat “breaks” the circuit between thermostat termi nal R to terminals Y and G. These open circuits deenergize contactor coil C and relay coil BR. The condenser and com pressor motors stop. After a 30-second delay, the blower motor stops. The unit is in a “standby” condition, waiting for the next “call for cooling” from the room thermostat.

MAINTENANCE

To ensure continuing high performance, and to minimize the possibility of premature equipment failure, periodic main tenance must be performed on this equipment. This com bination heatlng/cooling unit should be inspected at least once each year by a qualified service person. To trouble shoot heating or cooling of units, refer to Tables 15 and 16.

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

A WARNING

The ability to properly perform maintenance on this equip ment requires certain expertise, mechanical skills, tools, and equipment. If you do not possess these, do not at tempt to perform any maintenance on this equipment other than those procedures recommended in the User’s Manual. FAILURE TO HEED THIS WARN ING COULD RESULT IN SERIOUS PERSONAL INJURY AND POSSIBLE DAMAGE TO THIS EQUIPMENT.

The minimum maintenance requirements for this equip ment 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 heating and 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 heating and cooling season.

Service when necessary.

5. Check and inspect heating section before each heating season. Clean and adjust when necessary.

6. Check flue hood screen and remove any obstructions if

necessary.

7. Check vent screen and clean if necessary.

A WARNING

Failure to follow these warnings could result in serious

personal injury:

1. Turn off gas supply, then 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, etc.

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

4. Should overheating occur, or the gas supply fail to shut off, shut off the external main manual gas valve to the unit, then shut off the electrical supply.

Air Filter

A CAUTION

Never operate the unit without a suitable air filter in the retum-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 heating and cooling season or whenever the filter(s) becomes clogged with dust and lint.

Unit Top Removal

NOTE: When performing maintenance or service proce dures that require removal of the unit top, be sure to per form all of the routine maintenance procedures that require top removal, including: inspection of the heat exchanger area, coil inspection and cleaning, and condensate drain pan inspection and cleaning.

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

1. Turn off gas supply, then turn off electric power to unit.

2. Remove all screws that secure unit top, including screws

around 4 sides and those on top that screw into internal divider panels. Save all screws.

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

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

removed in Step 2, when maintenance and/or service pro cedures are completed. (Be sure to use original screws that have rubber washers to seal out water when secur ing top to internal divider panels.)

Evaporator Blower and Motor

NOTE: Motors without oilers are prelubricated Do not at tempt to lubricate these motors.

For longer life, operating economy, and continuing effi ciency, 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 (thermo stat FAN switch in ON position).

Page 40

Table 15 — Heating Troubleshooting Chart

SYMPTOM

Burners will not ignite.

Inadequate heating.

Poor flame characteristics.

CAUSE

Water in gas line No power to furnace No 24-v power supply to control

circuit

Miswired or loose connections Burned-out heat anticipator in

thermostat

Broken thermostat wire Misaligned spark electrodes

No gas at main burners

Dirty air filter Gas input to furnace too low

Unit undersized for application Restricted airflow Blower speed too low

Limit switch cycles main burners

Incomplete combustion results in: Aldehyde odors, carbon monoxide,

sooting flame, floating flame

REMEDY

Drain. Install drip leg. Check power supply fuses, wiring, or circuit breaker. Check transformer.

NOTE: Some transformers have internal overcurrent protection that requires a cool-down period to reset.

Check all wiring and wirenut connections.

Replace thermostat.

Run continuity check. Replace wire if necessary.

Check flame ignition and sense electrode positioning. Adjust as necessary.

1. Check gas line for air. Purge as necessary. NOTE: After purging gas line of air, wait at least

5 minutes for any gas to dissipate before attempt ing to light unit.

2. Check gas valve.

Clean or replace filter as necessary. Check gas pressure at manifold. Match with that on

unit nameplate. Replace with proper unit or add additional unit. Clean or replace filter. Remove any restriction. Use faster speed tap if available, or install alternate

motor. Check rotation of blower, thermostat heat antic

ipator settings, temperature rise of unit. Adjust as necessary.

1. Tighten all screws around burner compartment.

2. Cracked heat exchanger. Replace.

3. Unit overfired. Reduce input (change orifices or adjust gas line or manifold pressure).

4. Check burner alignment.

A WARNING

Turn off the gas supply, then disconnect and tag elec trical 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 for

direct-drive models:

1. Remove and disassemble blower assembly as follows: a. Remove blower access door. b. Disconnect motor lead from blower relay (BR)

Disconnect yellow lead from terminal L2 of the contactor.

c. Remove blower assembly from unit. Remove screws

securing blower to gas partition and slide assembly out. 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 dis assembly.

e. Loosen setscrew(s) that secures 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 (Yie oz. 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

orientation.

b. Lift wheel from housing. When handling and/or clean

ing blower wheel, be sure not to disturb balance weights

(clips) on blower wheel vanes.

c. 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 attachment. Remove grease and oil with mild

solvent. d. Reassemble wheel into housing. e. Reassemble motor into housing. Be sure setscrews

are tightened on motor shaft flats and not on round

part of shaft.

f. Reinstall blower access door.

4. Restore electrical power, then gas supply to unit. Start unit and check for proper blower rotation and motor speeds during heating and cooling cycles.

Page 41

Table 16 - Cooling Troubleshooting Chart

SYMPTOM CAUSE

Compressor and

condenser fan will

not start.

Compressor will not start but condenser fan runs.

Three-phase scroll

compressor (Units

Power failure Fuse blown or circuit breaker tripped Defective thermostat, contactor, transformer,

or control relay

Insufficient line voltage

Incorrect or faulty wiring Thermostat setting too high Faulty wiring or loose connections in

compressor circuit Compressor motor burned out, seized, or

internal overload open Defective run/start capacitor, overload,

start relay One leg of 3-phase power dead

Scroll compressor is rotating in the wrong direction

48SS048,060 and 48SX036-048 only)

makes excessive noise, and there may be a low pres sure differential.

Compressor cycles

Refrigerant overcharge or undercharge Reclaim refrigerant, evacuate system and

(other than normally satisfying

thermostat).

Compressor operates continuously.

Excessive head pressure.

Head pressure too low.

Excessive suction

pressure.

Suction pressure too low.

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

Defective thermostat

Faulty condenser-fan motor or capacitor Replace.

Restriction in refrigerant system Locate restriction and remove.

Dirty air filter Replace filter.

Unit undersized for load Decrease load or increase unit size. Thermostat set too low

Low refrigerant charge Locate leak, repair and recharge.

Leaking valves in compressor Replace compressor Air in system Condenser coil dirty or restricted

Dirty air filter Replace filter.

Dirty condenser coil

Refrigerant overcharged Reclaim excess refrigerant. Air in system Reclaim refrigerant, evacuate system, and recharge. Condenser air restricted or air short-cycling

Low refrigerant charge Check for leaks, repair and recharge. Compressor valves leaking Replace compressor.

Restriction in liquid tube Remove restriction.

High heat load Check for source and eliminate.

Compressor valves leaking Replace compressor.

Refrigerant overcharged Reclaim excess refrigerant.

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 Inorease air quantity. Check filter — replace if

Temperature too low in conditioned area

Outdoor ambient below 40 F

Field-installed filter-drier restricted Replace.

REMEDY

Call power company. Replaoe fuse or reset circuit breaker. Replace component.

Determine cause and correct. Check wiring diagram and rewire correctly. Lower thermostat setting below room temperature. Check wiring and repair or replace.

Determine cause. Replace compressor.

Determine cause and replace.

Replace fuse or reset circuit breaker. Determine cause.

Correct the direction of rotation by reversing the 3-phase power leads to the unit Shut down unit to allow pressures to equalize.

recharge to capacities shown on nameplate.

Determine cause and replace.

Replace thermostat.

Reset thermostat.

Reclaim refrigerant, evacuate system, and recharge. Clean coil or remove restriction.

Clean coil.

Determine cause and correct.

necessary.

Reset thermostat. Install low-ambient kit.

Page 42

Flue Gas Passageways — To inspect the flue col

lector box and upper areas of the heat exchanger:

1. Remove the combustion blower wheel and motor assem bly according to directions in Combustion-Air Blower

section below.

2. Remove the 3 screws holding the blower housing to the flue collector box cover (see Fig. 31).

3. Remove the 12 screws holding the flue collector box

cover (Fig. 31) to the heat exchanger assembly. Inspect

the heat exchangers.

4. Clean all surfaces as required using the wire brush.

Fig. 32 — Burner Access Panel

BURNER

-ACCESS PANEL

BURNER RACK

MOUNTING SCREW

Fig. 31 — Blower Housing and Flue Collector Box

Combustion-Air Blower — Clean periodically to as

sure proper airflow and heating efficiency. Inspect blower wheel every fall and periodically during heating season. For the first heating season, inspect blower wheel bimonthly to determine proper cleaning frequency.

To inspect blower wheel, remove draft hood assembly. Shine a flashlight into opening to inspect wheel. If cleaning is required, remove motor and wheel as follows;

1. Remove burner access panel. (See Fig. 32.)

2. Remove the 7 screws that attach induced-draft motor mount

ing plate to blower housing. (See Fig. 31.)

3. Slide the motor and blower wheel assembly out of the

blower housing. (See Fig. 33.) Clean the blower wheel. If additional cleaning is required, continue with Steps 4 and 5.

4. To remove blower, remove 2 setscrews. (See Fig. 33.)

5. To remove motor, remove 4 screws that hold blower

housing to mounting plate. Remove the motor cooling fan by removing one setscrew. Remove nuts that hold motor to mounting plate

6. To reinstall, reverse the procedure outlined above.

Fig. 33 — Removal of Motor and Blower Wheel

Limit Switch — Remove blower panel. Limit switch is

located on the gas partition.

Burner Ignition — Unit is equipped with a direct spark

ignition 100% lockout system. Ignition module is lo cated in the control box. Module contains a self-diagnostic LED. During servicing, refer to label diagram for LED interpretation.

If lockout occurs, unit may be reset by either momen tarily interrupting power supply to unit, or turning selector switch to OFF position at the thermostat.

Main Burners — At the beginning of each heating sea

son, inspect for deterioration or blockage due to corrosion or other causes. Observe the main burner flames and adjust if necessary.

Page 43

A CAUTION

When servicing gas train, do not hit or plug orifice spuds.

REMOVAL OF GAS TRAIN

1. Shut off manual gas valve.

2. Shut off power to unit

3. Remove burner access panel. (See Fig. 32.)

4. Disconnect gas piping at unit gas valve.

5. Remove wires connected to gas valve. Mark each wire

6. Remove ignitor and sensor wires at the ignitor module.

7. Remove the mounting screw that attaches the burner rack to the basepan. (See Fig. 31.)

8 Slide the burner rack out of the unit. (See Fig. 31 and

34.)

9. To reinstall, reverse the procedure outlined above.

Straighten bent fins with a fin comb. If coated with dirt or lint, clean the coils with a vacuum cleaner, using the soft brush attachment. Be careful not to bend the fins. If coated with oil or grease, clean the coils with a mild detergentand-water solution. Rinse coils with clear water, using a garden hose. Be careful not to splash water on motors, in sulation, wiring, or air filter(s). For best results, spray con denser coil fins from inside to outside the unit. On units with an outer and inner condenser coil, be sure to clean be tween the coils. Be sure to flush all dirt and debris from the unit base.

Inspect the drain pan and condensate drain line when in specting 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

A CAUTION

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.

Remove 2 screws at bottom and 2 screws along sides of condenser air intake grille and remove plastic grille.

Inspect the fan blades for cracks or bends.

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

3. the fan off the motor shaft.

When replacing fan blade, position blade so that lead

4. ing edge is ‘/2 in. in front of fan orifice. See Fig. 22.

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

Replace grille.

Fig. 34 — Burner Rack Removed

Condenser Coil, Evaporator Coil, and Conden sate Drain Pan — Inspect the condenser coil, evapo

rator 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 39.

The coils are easily cleaned when dry; therefore, inspect and clean the coils either before or after each cooling sea son. Remove all obstructions, including weeds and shrubs, that interfere with the airflow through the condenser coil.

Electrical Controls and Wiring — Inspect and check

the electrical controls and wiring annually. Be sure to turn off the gas supply, and then the electrical power to the unit.

Remove the control, blower, and compressor compart ment 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, re place all the panels. Start the unit, and observe at least one complete heating cycle and one complete cooling cycle to ensure proper operation. If discrepancies are observed in either or both operating cycles, or if a suspected malfunc tion 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 heating and/or cooling sequence of op eration in this publication as an aid in determining proper control operation.

Page 44

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)

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

TIGHTNESS

Ref

nect Dete

If pect leak refri Leal

If man Refi

Gai

unie lem

III. START-UP

ELECTRICAL

SUPPLY VOLTAGE

COMPRESSOR AMPS COMPRESSOR AMPS INDOOR-FAN AMPS

TEMPERATURES

OUTDOOR-AIR TEMPERATURE RETURN-AIR TEMPERATURE COOLING SUPPLY AIR GAS HEAT SUPPLY AIR

PRESSURES

GAS INLET PRESSURE GAS MANIFOLD PRESSURE REFRIGERANT SUCTION REERIGERANT DISCHARGE

L1-L2 L2-L3 LI

1,2 L3 LI L2 LI

1.2 L3

DB DB

IN. WG IN. WG PSIG

PSIG

L3-L1

1.3

LIJ

1= o

z O

< H

3 o

□ VERIFY REFRIGERANT CHARGE USING CHARGING TABLES

□ VERIFY THAT 3-PHASE SCROLL COMPRESSOR ROTATING IN CORRECT DIRECTION

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

Book|1 |4 PC 111 Cataiog No. 534-842 Printed in U S.A Form 48SS,SX-2Si Pg CL-1 5-94 Repiaoes: 48SS,SX-1Si

Tab 1a 6a

Cop

Boo Tab

Page 45

Refrigerant Circuit — 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 sus pected, leak-test all refrigerant tubing using an electronic leak-detector, halide torch, or liquid-soap solution. If a refrigerant leak is detected, refer to Check for Refrigerant Leaks section on page 21.

If no refrigerant leaks are found and low cooling perfor mance is suspected, refer to Checking and Adjusting Refrigerant Charge section on page 30.

Gas Input — The gas input does not require checking unless improper heating performance is suspected. If a prob lem exists, refer to Start-Up section on page 21

Evaporator Airflow — The heating and/or cooling air flow does not require checking unless improper perfor mance is suspected. If a problem exists, be sure that all

supply- and return-air grilles are open and free from ob structions, and that the air filter is clean. When necessary,

refer to Indoor Airflow and Airflow Adjustments section on page 30 to check the system airflow.

Metering Device — Acutrol " Device — This me

tering device is a fixed orifice and is located in the header to the evaporator coll.

Liquid Line Strainer — The liquid line strainer (to

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

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

Book|1 |4 PC 111 Catalog No 534-842 Printed in U S A Form 48SS,SX-2SI Pg 44 5-94 Replaces: 48SS,SX-1 Si Tab la 6a

Carrier 48SX024-048 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

CONTENTS

A WARNING

A WARNING

SAFETY CONSIDERATIONS

Fig. 5 - 4888048,060 With Optional Base Rail, Unit Dimensions

RECEIVING AND INSTALLATION

Step 1 - Check Equipment

Step 2 - Provide Unit Support

A CAUTION

Step 5 — Rig and Place Unit

A CAUTION

A CAUTION

Fig. 11 - Slab Mounting Details

A CAUTION

A WARNING

Step 6 — Connect Condensate Drain

A CAUTION

A CAUTION

A CAUTION

A WARNING

A WARNING

A CAUTION

Step 10 — Install Electrical Connections

A WARNING

A CAUTION

Fig. 21 — High- and Control-Voltage Connections

A WARNING

A CAUTION

START-UP

Check for Refrigerant Leaks - Proceed as follows

A CAUTION

A CAUTION

Table 5 — Rated Gas Inputs at

Indicated Manifold Pressures

A WARNING

LED Indications

Fig. 27 — 460-3-60 Wiring Diagram, Units 48SS036-060

A CAUTION

A WARNING

Table 7B — Superheat Charging Table, 48SS024

Table 7E — Superheat Charging Table, 48SS042

Table 8B — Superheat Charging Table, 48SX030

Table 8D — Superheat Charging Table, 48SX042

MAINTENANCE

A WARNING

A WARNING

Air Filter

A CAUTION

Unit Top Removal

Evaporator Blower and Motor

A WARNING

Fig. 32 — Burner Access Panel

A CAUTION

Condenser Fan

A CAUTION

Fig. 34 — Burner Rack Removed

I. PRELIMINARY INFORMATION

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

III. START-UP

Metering Device — Acutrol " Device — This me