Carrier 48SX024-048 User Manual

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.

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

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

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

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

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

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

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

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)

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.

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

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.

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

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

+ 31 hidden pages

Carrier 48SX024-048 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