Carrier 48SS018-060, 48SX024-060 User Manual

48SS018-060 48SX024-060 Single Package Gas Heating/

Electric Cooling Units

Installation, Start-Up and

Service Instructions

CONTENTS

Page

SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . 1-9

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

RECEIVING AND INSTALLATION . . . . . . . . . . . 10-22

Step 1 Ð Check Equipment . . . . . . . . . . . . . . . . . . 10

·IDENTIFY UNIT

·INSPECT SHIPMENT

Step 2 Ð Provide Unit Support . . . . . . . . . . . . . . 10

·ROOF CURB

·SLAB MOUNT

·FLUSH MOUNT

Step 3 Ð Field Fabricate Ductwork . . . . . . . . . . . 10 Step 4 Ð Provide Clearances . . . . . . . . . . . . . . . . 10 Step 5 Ð Rig and Place Unit . . . . . . . . . . . . . . . . . 10

·UNITS WITHOUT BASE RAIL

·UNITS WITH OPTIONAL BASE RAIL

Step 6 Ð Connect Condensate Drain . . . . . . . . . 13 Step 7 Ð Install Flue Hood . . . . . . . . . . . . . . . . . . 13 Step 8 Ð Install Gas Piping . . . . . . . . . . . . . . . . . . 13 Step 9 Ð Install Duct Connections . . . . . . . . . . . 16

·CONFIGURING UNITS FOR DOWNFLOW (VERTICAL) DISCHARGE

Step 10 Ð Install Electrical Connections . . . . . 18

·HIGH-VOLTAGE CONNECTIONS

·SPECIAL PROCEDURES FOR 208-V OPERATION

·CONTROL VOLTAGE CONNECTIONS; NON-INTEGRATED CONTROL MOTOR (NON-ICM) UNITS

·CONTROL VOLTAGE CONNECTIONS; INTEGRATED CONTROL MOTOR (ICM) UNITS

·HEAT ANTICIPATOR SETTING

·TRANSFORMER PROTECTION

PRE-START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22,23 START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23-44 MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44-47 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . 48-50 START-UP CHECKLIST . . . . . . . . . . . . . . . . . . . . . CL-1

NOTE TO INSTALLER Ð Before the installation, READ THESE INSTRUCTIONS CAREFULLY AND COMPLETELY. Also, make sure the User's Manual and Replacement Guide are left with the unit after installation. The furnace is NOT to be used for temporary heating of buildings or structures under construction.

SAFETY CONSIDERATIONS

Installation and servicing of air-conditioning equipment can be hazardous due to system pressure and electrical components. Only trained and quali®ed personnel should install, repair, or service air-conditioning equipment.

Fig. 1 Ð Unit 48SX Shown With Optional Base Rail

Untrained personnel can perform basic maintenance functions of cleaning coils and ®lters. All other operations should be performed by trained service personnel. When working on air-conditioning equipment, observe precautions in the literature, tags and labels attached to the unit, and other safety precautions that may apply.

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

Improper installation, adjustment, alteration, service, maintenance, or use can cause carbon monoxide poisoning, ®re, or an explosion which can result in personal injury or unit damage. Consult a quali®ed installer, service agency, or gas supplier for information or assistance. The quali- ®ed installer or agency must use only factory-authorized kits or accessories when modifying this product.

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

General Ð The 48SS,SX units (see Fig. 1) are fully selfcontained, combination Category I gas heating/electric cooling units designed for outdoor installation. See Fig. 2-9 (pages 2-9) for unit dimensions. All unit sizes have discharge openings for both horizontal and down¯ow con®gurations, and are factory shipped with all 4 duct openings covered. Units may be installed either on a rooftop or a ground-level cement slab. See Fig. 10 for roof curb dimensions.

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

Book	1	4		PC 111	Catalog No. 534-721	Printed in U.S.A.	Form 48SS,SX-12SI	Pg 1	9-98	Replaces: 48SS,SX-11SI
Tab	1a	6a

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 MAT'L. in. (mm)

Maximum extension of overhangs . . . . . . . . . . . . . . . 48 (1219)

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

Duct side of unit . . . . . . . . . . . . . . . . . . . . . . . . 2 (51)

Side opposite ducts . . . . . . . . . . . . . . . . . . .	.	. 14 (356)
Bottom of unit . . . . . . . . . . . . . . . . . . . . . .	. . . . . 0
Flue panel . . . . . . . . . . . . . . . . . . . . . . .	.	. 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)

	ELECTRICAL	UNIT WEIGHT			CORNER WEIGHT			UNIT HEIGHT
UNIT					(lb/kg)			(in./mm)
	CHARACTERISTICS
		lb	kg	A	B	C	D	E
48SS180040	208/230-1-60	272	123	81/37	62/28	76/35	53/24	24.1/613
48SS024040	208/230-1-60	303	138	97/44	43/20	123/56	40/18	24.1/613
48SS024060	208/230-1-60	315	143	100/45	46/21	126/57	43/20	24.1/613
48SS030040	208/230-1-60, 208/230-3-60	320	145	100/45	47/21	126/57	47/21	24.1/613
48SS030060/080	208/230-1-60, 208/230-3-60	332	149	103/46	50/22	129/58	50/23	24.1/613
48SS036060/080	208/230-1-60, 208/230-3-60, 460-3-60	336	153	86/39	76/35	111/50	63/29	24.1/613
48SS036100/120	208/230-1-60, 208/230-3-60, 460-3-60	348	158	89/40	79/36	114/52	66/30	24.1/613
48SS042060/080	208/230-1-60, 208/230-3-60, 460-3-60	375	170	95/43	86/39	119/54	75/34	28.1/714
48SS042100/120	208/230-1-60, 208/230-3-60, 460-3-60	387	176	98/45	89/40	122/55	78/35	28.1/714

	UNIT	F	G	CENTER OF GRAVITY in./mm
		in./mm	in./mm	X	Y	Z
	48SS018040			25.07/637	20.59/523
	48SS024040			27.07/688	23.35/593
	48SS024060			26.98/685	23.27/591
	48SS030040	169¤16/420.7	1815¤16/481.0	26.71/678	23.46/596	10.85/276
	48SS030060/080			27.15/689	22.36/568
	48SS036060/080			27.50/698	22.48/571
	48SS036100/120			27.40/696	22.44/570
	48SS042060/080	209¤16/522.3	2215¤16/582.6	27.01/686	22.44/570	12.7/321
	48SS042100/120			26.94/684	22.44/570

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

NOTES:

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

2.Adequate clearance around air openings into combustion chamber must be provided.

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

2

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 MAT'L. in. (mm)

Maximum extension of overhangs . . . . . . . . . . . . . . . 48 (1219)

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

Duct side of unit . . . . . . . . . . . . . . . . . . . . . . . . 2 (51)

Side opposite ducts . . . . . . . . . . . . . . .	. . . . . . 14 (356)
Bottom of unit . . . . . . . . . . . . . . . . . .	. .	.	. . . . . . 0
Flue panel . . . . . . . . . . . . . . . . . . .	. .	.	. .	. 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)

	ELECTRICAL	UNIT WEIGHT			CORNER WEIGHT			UNIT HEIGHT
UNIT					(lb/kg)			(in./mm)
	CHARACTERISTICS
		lb	kg	A	B	C	D	E
48SS018040	208/230-1-60	296	135	87/40	68/31	82/37	59/27	27.4/697
48SS024040	208/230-1-60	327	149	103/47	49/22	129/59	46/21	27.4/697
48SS024060	208/230-1-60	339	155	106/48	52/24	132/60	49/22	27.4/697
48SS030040	208/230-1-60, 208/230-3-60	344	157	106/48	53/24	132/60	53/24	27.4/697
48SS030060/080	208/230-1-60, 208/230-3-60	356	162	102/46	71/32	123/56	60/27	27.4/697
48SS036060/080	208/230-1-60, 208/230-3-60, 460-3-60	360	164	92/42	82/37	117/53	69/31	27.4/697
48SS036100/120	208/230-1-60, 208/230-3-60, 460-3-60	372	169	95/43	85/39	120/55	72/33	27.4/697
48SS042060/080	208/230-1-60, 208/230-3-60, 460-3-60	399	181	101/46	92/42	125/57	81/37	31.4/798
48SS042100/120	208/230-1-60, 208/230-3-60, 460-3-60	411	187	104/47	95/43	128/58	84/38	31.4/798

	UNIT	F	G	CENTER OF GRAVITY in./mm
		in./mm	in./mm	X		Y	Z
	48SS018040			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	197¤8/504.8	221¤4/565.4	26.57/674.9	20.1	/509.3	13.16/334.3
	48SS030060/080			26.93/684	21.1	/535.4
	48SS036060/080			27.31/693.7	21.0	/532.6
	48SS036100/120			27.23/691.6	21.0	/533.1
	48SS042060/080	237¤8/606.4	261¤4/666.8	26.87/682.5	21.0	/533.1	14.96/380
	48SS042100/120			26.81/681	21.0	/533.7

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

NOTES:

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

2.Adequate clearance around air openings into combustion chamber must be provided.

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

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 MAT'L. in. (mm)

Maximum extension of overhangs . . . . . . . . . . . . . . . 48 (1219)

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

Duct side of unit . . . . . . . . . . . . . . . . . . . . . . . . 2 (51)

Side opposite ducts . . . . . . . . . . . . . . . . . . .	.	. 14 (356)
Bottom of unit . . . . . . . . . . . . . . . . . . . . . .	. . . . . 0
Flue panel . . . . . . . . . . . . . . . . . . . . . . .	.	. 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)

	ELECTRICAL	UNIT WEIGHT			CORNER WEIGHT
UNIT						(lb/kg)
	CHARACTERISTICS
		lb	kg	A	B		C	D
48SS048080	208/230-1-60, 208/230-3-60, 460-3-60	414	188	107/49	83/38		158/72	66/30
48SS048100/120/140	208/230-1-60, 208/230-3-60, 460-3-60	426	193	110/50	86/39		159/72	71/32
48SS060080	208/230-1-60, 208/230-3-60, 460-3-60	453	206	117/53	93/42		167/76	76/35
48SS060100/120/140	208/230-1-60, 208/230-3-60, 460-3-60	465	211	120/55	96/44		167/76	82/37

	UNIT	CENTER OF GRAVITY (in./mm)
		X	Y	Z
	48SS048080	28.76/731	23.46/596	15.35/390
	48SS048100/120/140	28.42/722	23.42/595	15.35/390
	48SS060080	28.36/720	23.27/591	15.35/390
	48SS060100/120/140	27.95/710	23.23/590	15.35/390

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

NOTES:

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

2.Adequate clearance around air openings into combustion chamber must be provided.

Fig. 4 Ð 48SS048,060 Without Base Rail, Unit Dimensions

4

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 MAT'L. in. (mm)

Maximum extension of overhangs . . . . . . . . . . . . . . . 48 (1219)

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

Duct side of unit . . . . . . . . . . . . . . . . . . . . . . . . 2 (51)

Side opposite ducts . . . . . . . . . . . . . . . . . . .	.	. 14 (356)
Bottom of unit . . . . . . . . . . . . . . . . . . . . . .	. . . . . 0
Flue panel . . . . . . . . . . . . . . . . . . . . . . .	.	. 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)

	ELECTRICAL	UNIT WEIGHT			CORNER WEIGHT
UNIT						(lb/kg)
	CHARACTERISTICS
		lb	kg	A	B		C	D
48SS048080	208/230-1-60, 208/230-3-60, 460-3-60	438	199	113/51	89/40		164/75	72/33
48SS048100/120/140	208/230-1-60, 208/230-3-60, 460-3-60	450	205	116/53	92/42		165/75	77/35
48SS060080	208/230-1-60, 208/230-3-60, 460-3-60	477	217	123/56	99/45		173/79	82/37
48SS060100/120/140	208/230-1-60, 208/230-3-60, 460-3-60	489	222	126/57	102/46		173/79	88/40

	UNIT	CENTER OF GRAVITY (in./mm)
		X	Y	Z
	48SS048080	28.54/724.9	20.00/508	17.66/448.6
	48SS048100/120/140	28.22/716.8	20.05/509.3	17.66/448.6
	48SS060080	28.18/715.6	20.19/512.8	17.66/448.6
	48SS060100/120/140	27.79/705.9	20.23/513.8	17.66/448.6

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

NOTES:

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

2.Adequate clearance around air openings into combustion chamber must be provided.

Fig. 5 Ð 48SS048,060 With Optional Base Rail, Unit Dimensions

5

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 MAT'L. in. (mm)

Maximum extension of overhangs . . . . . . . . . . . . . . . 48 (1219)

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

Duct side of unit . . . . . . . . . . . . . . . . . . . . . . . . 2 (51)

Side opposite ducts . . . . . . . . . . . . . . .	. . . . . . 14 (356)
Bottom of unit . . . . . . . . . . . . . . . . . .	. .	. .	. . . . . 0
Flue panel . . . . . . . . . . . . . . . . . . .	. .	. .	. . 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)

	ELECTRICAL	UNIT WEIGHT			CORNER WEIGHT
UNIT					(lb/kg)
	CHARACTERISTICS
		lb	kg	A	B	C	D
48SX024040	208/230-1-60	333	151	104/47	50/23	130/59	49/22
48SX024060	208/230-1-60	345	157	107/49	53/24	133/60	52/24
48SX030040	208/230-1-60	336	153	97/44	66/30	118/54	55/25
48SX030060/080	208/230-1-60	348	158	100/45	69/31	121/55	58/26
48SX036060/080	208/230-1-60, 208/230-3-60, 460-3-60	366	166	94/43	84/38	117/53	71/32
48SX036100/120	208/230-1-60, 208/230-3-60, 460-3-60	378	172	97/44	87/40	120/55	74/34

	UNIT	CENTER OF GRAVITY (in./mm)
		X	Y	Z
	48SX024040	26.71/678	20.06/510	12.65/321
	48SX024060	26.64/677	20.12/511	12.65/321
	48SX030040	27.06/687	21.05/535	12.65/321
	48SX030060/080	26.98/685	21.07/535	12.65/321
	48SX036060/080	27.14/689	21.10/536	12.65/321
	48SX036100/120	27.06/687	21.12/536	12.65/321

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

NOTES:

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

2.Adequate clearance around air openings into combustion chamber must be provided.

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

6

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 MAT'L. in. (mm)

Maximum extension of overhangs . . . . . . . . . . . . . 48 (1219)

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

Duct side of unit . . . . . . . . . . . . . . . . . . . . . . 2 (51)

Side opposite ducts . . . . . . . . . . . . . . . . . . . . 14 (356)

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

Flue panel . . . . . . . . . . . . . . . . . . . . . . . . 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)

	ELECTRICAL	UNIT WEIGHT			CORNER WEIGHT
UNIT					(lb/kg)
	CHARACTERISTICS
		lb	kg	A	B	C	D
48SX024040	208/230-1-60	357	163	110/50	56/25	136/62	55/25
48SX024060	208/230-1-60	369	168	113/51	59/27	139/63	58/26
48SX030040	208/230-1-60	360	164	103/47	72/33	124/56	61/28
48SX030060/080	208/230-1-60	372	169	106/48	75/34	127/58	64/29
48SX036060/080	208/230-1-60, 208/230-3-60, 460-3-60	390	177	100/45	90/41	123/56	77/35
48SX036100/120	208/230-1-60, 208/230-3-60, 460-3-60	402	183	103/47	93/42	127/57	80/36

	UNIT	CENTER OF GRAVITY (in./mm)
		X	Y	Z
	48SX024040	26.57/674.9	20.17/512.3	14.96/380.0
	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

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

NOTES:

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

2.Adequate clearance around air openings into combustion chamber must be provided.

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

7

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 MAT'L. in. (mm)

Maximum extension of overhangs . . . . . . . . . . . . . . . 48 (1219)

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

Duct side of unit . . . . . . . . . . . . . . . . . . . . . . . . 2 (51)

Side opposite ducts . . . . . . . . . . . . . . . . . . .	.	. 14 (356)
Bottom of unit . . . . . . . . . . . . . . . . . . . . . .	. . . . . 0
Flue panel . . . . . . . . . . . . . . . . . . . . . . .	.	. 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)

	ELECTRICAL	UNIT WEIGHT			CORNER WEIGHT
UNIT					(lb/kg)
	CHARACTERISTICS
		lb	kg	A	B	C	D
48SX042060/080	208/230-1-60, 208/230-3-60, 460-3-60	391	178	100/45	91/41	120/55	80/36
48SX042100/120	208/230-1-60, 208/230-3-60, 460-3-60	403	183	103/47	94/43	123/56	83/38
48SX048080	208/230-1-60, 208/230-3-60, 460-3-60	422	192	109/50	85/39	158/72	70/32
48SX048100/120/140	208/230-1-60, 208/230-3-60, 460-3-60	434	197	112/51	88/40	161/73	73/33
48SX060080	208/230-1-60, 208/230-3-60	453	206	117/53	93/42	167/76	76/35
48SX060100/120/140	208/230-1-60, 208/230-3-60	465	211	120/55	96/44	167/76	82/37

	UNIT	CENTER OF GRAVITY (in./mm)
		X	Y	Z
	48SX042060/080	26.66/677	21.19/538	15.35/390
	48SX042100/120	26.61/676	21.21/539	15.35/390
	48SX048080	28.45/723	19.95/507	15.35/390
	48SX048100/120/140	28.35/720	19.99/508	15.35/390
	48SX060080	28.36/720	23.27/591	15.35/390
	48SX060100/120/140	27.95/710	23.23/590	15.35/390

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

NOTES:

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

2.Adequate clearance around air openings into combustion chamber must be provided.

Fig. 8 Ð 48SX042-060 Without Base Rail, Unit Dimensions

8

		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 MAT'L. in. (mm)
		Maximum extension of overhangs . . . . . . . . . . . . . . . 48 (1219)
		Unit top . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 (356)
		Duct side of unit . . . . . . . . . . . . . . . . . . . . . . . . 2 (51)
		Side opposite ducts . . . . . . . . . . . . . . . . . .	.	.	. 14 (356)
		Bottom of unit . . . . . . . . . . . . . . . . . . . . .	. . . . . . 0
		Flue panel . . . . . . . . . . . . . . . . . . . . . .	.	.	. 36 (914)
	LEGEND
CG	Ð Center of Gravity
COND	Ð Condenser
LV	Ð	Low Voltage
MAT'L	Ð	Material
NEC	Ð	National Electrical Code
REQ'D	Ð	Required

	ELECTRICAL	UNIT WEIGHT			CORNER WEIGHT
UNIT					(lb/kg)
	CHARACTERISTICS
		lb	kg	A	B	C	D
48SX042060,080	208/230-1-60, 208/230-3-60, 460-3-60	415	189	106/48	97/44	126/57	86/39
48SX042100,120	208/230-1-60, 208/230-3-60, 460-3-60	427	194	109/50	100/45	129/59	89/40
48SX048080	208/230-1-60, 208/230-3-60, 460-3-60	446	293	115/52	91/41	164/75	76/35
48SX048100/120/140	208/230-1-60, 208/230-3-60, 460-3-60	458	208	118/54	94/43	167/76	79/36
48SX060080	208/230-1-60, 208/230-3-60	477	217	123/56	99/45	173/79	82/37
48SX060100/120/140	208/230-1-60, 208/230-3-60	489	222	126/57	102/46	173/79	88/40

	UNIT	CENTER OF GRAVITY (in./mm)
		X	Y	Z
	48SX042060,080	26.55/674.4	21.22/539.0	17.66/448.6
	48SX042100,120	26.50/673.0	21.24/539.6	17.66/448.6
	48SX048080	28.25/717.6	20.04/509.0	17.66/448.6
	48SX048100/120/140	28.16/715.3	20.08/510.0	17.66/448.6
	48SX060080	28.18/715.6	20.19/512.8	17.66/448.6
	48SX060100/120/140	27.79/705.9	20.23/513.8	17.66/448.6

NOTES:

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

2.Adequate clearance around air openings into combustion chamber must be provided.

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)

Fig. 9 Ð 48SX042-060 With Optional Base Rail, Unit Dimensions

9

RECEIVING AND INSTALLATION

Step 1 Ð Check Equipment

IDENTIFY UNIT Ð The unit model number and serial number are stamped on unit identi®cation plate. Check this information against shipping papers and job data.

INSPECT SHIPMENT Ð Inspect for shipping damage while unit is still on shipping pallet. If unit appears to be damaged or is torn loose from its anchorage, have it examined by transportation inspectors before removal. Forward claim papers directly to transportation company. Manufacturer is not responsible for any damage incurred in transit.

Check all items against shipping list. Immediately notify the nearest Carrier Air Conditioning office if any item is missing.

To prevent loss or damage, leave all parts in original packages until installation.

Step 2 Ð Provide Unit Support

ROOF CURB Ð Install accessory roof curb in accordance with instructions shipped with curb. See Fig. 10 for roof curb dimensions. Install insulation, cant strips, roo®ng, and ¯ashing. Ductwork must be attached to curb.

IMPORTANT: The gasketing of the unit to the roof curb is critical for a watertight seal. Install gasketing material supplied with the roof curb. Improperly applied gasketing can also result in air leaks and poor unit performance.

Curb should be level to within 1¤4 inch. This is necessary for unit drain to function properly. Refer to accessory roof curb installation instructions for additional information as required.

SLAB MOUNT Ð 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 ¯ush 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 air¯ow by grass or shrubs. Do not secure the unit to the slab except when required by local codes.

FLUSH MOUNT Ð Place side of unit with duct panel ¯ush against transition. On units with optional base rails, the skirt on duct-panel side of unit can be removed to allow unit to be mounted ¯ush against transitions that extend below basepan of unit. To remove skirt, remove 4 screws holding skirt to base rail. Then, remove skirt.

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 Ð Field Fabricate Ductwork Ð Secure all ducts to roof curb and building structure on vertical discharge units. Do not connect ductwork to unit. For horizontal applications, unit is provided with ¯anges on the horizontal openings. All ductwork should be secured to the ¯anges. Insulate and weatherproof all external ductwork, joints, and roof openings with counter ¯ashing 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 applicable ®re codes.

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

Step 4 Ð Provide Clearances Ð The required minimum operating and service clearances are shown in Fig. 2-9. Adequate combustion, ventilation, and condenser air must be provided, in accordance with section 5.3, Air for Combustion and Ventilation, of the National Fuel Gas Code ANSI (American National Standards Institute) Z223.1 (in Canada, sections 7.2, 7.3 or 7.4 or Can/CGA [Canadian Gas Association] B149 Installation Codes), or applicable provisions of local building code.

Do not restrict condenser air¯ow. 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 ¯ood the unit. Do not install the unit on carpeting, tile, or other combustible materials. The unit may be installed on wood ¯ooring or on Class A, B, or C roof covering materials.

Step 5 Ð Rig and Place Unit

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 position 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 before setting the unit in place. When a ®eld-fabricated support is used, be sure that the support is level and properly supports the unit.

10

		PART NUMBER	``A''
	FLAT	CPRFCURB001A00	89 [203]
		CPRFCURB002A00	119 [279]
	CURB
		CPRFCURB003A00	149 [356]

NOTES:

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

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

3. Dimensions in [ ] are in millimeters.

4.Roof curb is made of 16 gage steel.

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

6.Service clearance 4 ft on each side.

7. Direction of air¯ow.

8.Insulated panels: 1-in. thick ®berglass 1 lb density.

Fig. 10 Ð Roof Curb Dimensions

11

Fig. 11 Ð Slab Mounting Details

NOTICE TO RIGGERS

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

All panels must be in place when rigging.

UNIT	MAX		A				B		C
48SS	WEIGHT
Size	lb	kg	in.		mm	in.		mm	in.	mm
018	332	150				24.3		618	24.85	631
024	375	170				22.4		570	24.85	631
030	384	174				22.3		565	24.85	631
036	408	185	49.4		1255	22.0		559	24.85	631
042	447	203				22.5		571	28.85	733
048	486	220				21.0		533	34.85	885
060	525	238				21.5		545	34.85	885
UNIT
48SX
024	405	184				22.8		579	28.9	733
030	408	185				22.4		569	28.9	733
036	438	199	49.4		1255	22.4		569	28.9	733
042	463	210				22.8		579	34.9	885
048	494	224				21.1		536	34.9	885
060	525	238				21.5		545	34.9	885

Fig. 12 Ð Suggested Rigging for Units Without Base Rail

NOTICE TO RIGGERS

Hook rigging shackles through holes in lifting brackets, as shown in Detail ``A.'' Lifting brackets to be centered around the unit center of gravity. Use wood top skid when rigging, to prevent rigging straps from damaging unit. Remove 4 screws to slide wood support through rectangular hole in rail.

All panels must be in place when rigging.

UNIT	MAX		A				B			C
48SS	WEIGHT
Size	lb	kg	in.		mm	in.		mm	in.		mm
018	320	145				24.4		619	28.2		715
024	363	165				22.6		574	28.2		715
030	380	172				22.5		571	28.2		715
036	396	180	49.4		1255	22.2		563	28.2		715
042	435	197				22.6		574	32.2		816
048	474	215				21.2		538	38.2		969
060	513	233				21.6		549	38.2		969
UNIT
48SX
024	393	178				22.9		582	32.2		816
030	396	180				22.6		574	32.2		816
036	426	193	49.4		1255	22.5		571	32.2		816
042	451	205				22.9		582	38.2		969
048	482	219				21.3		540	38.2		969
060	513	233				21.6		549	38.2		969

Fig. 13 Ð Suggested Rigging for Units With Optional Base Rail

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

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

Never use lifting brackets when the temperature is below −10 F.

Never exceed 200 lbs per bracket of lifting force.

Never use lifting brackets for lifting other models of airconditioning units.

Lifting point should be directly over the unit center of gravity.

1.Position brackets as close to the corners of unit as possible. Be sure brackets are well outside of center of gravity. (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 prevent straps from damaging unit. If wood top is not available, use spreader bars of sufficient length.

12

UNITS WITH OPTIONAL BASE RAIL Ð Lifting holes are provided in optional base rail as shown in Fig. 13. Operating weights are shown in Tables 1 and 2. Refer to rigging instructions on unit.

Protective wood support must be removed from unit before 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 Ð 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 3¤4 in. NPT ®tting which exits through the compressor access panel. See Fig. 2-9 for location.

Condensate water can be drained directly onto the roof in rooftop installations (where permitted) or onto a gravel apron in ground-level installations. Install a ®eld-supplied condensate trap at end of condensate connection to ensure proper drainage. Make sure that the outlet of the trap is at least 1 in. lower than the drain-pan condensate connection to prevent the pan from over¯owing. See Fig. 14. Prime the trap with water. When using a gravel apron, make sure it slopes away from the unit.

If the installation requires draining the condensate water away from the unit, install a 2-in. trap at the condensate connection to ensure proper drainage. See Fig. 14. Make sure that the outlet of the trap is at least 1 in. lower than the drainpan condensate connection to prevent the pan from over- ¯owing. Prime the trap with water. Connect a drain tube using a minimum of 3¤4-in. PVC or 3¤4-in. copper pipe (all ®eldsupplied) at the outlet end of the 2-in. trap. Do not undersize 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.

Fig. 14 Ð Condensate Trap

Step 7 Ð Install Flue Hood Ð The ¯ue hood assembly is shipped screwed to the control box in the burner compartment. Remove the burner access panel to locate the assembly.

For units being installed in California Air Quality Management Districts which require NOx emissions of 40 nanograms/joule or less, kit CRLOWNOX001A00 must be installed.

The venting system is designed to ensure proper venting. The ¯ue hood assembly must be installed as indicated in this section of the unit installation instructions.

Install the ¯ue hood as follows:

1.This installation must conform with local building codes and with the National Fuel Gas Code (NFGC), ANSI Z223.1 (in Canada, CAN/CGA B149.1, and B149.2) or NFPA (National Fire Protection Association) latest revision. Refer

to Provincial and local plumbing or wastewater codes and other applicable local codes.

2.Remove from shipping location. Place vent cap assembly over ¯ue panel. Orient screw holes in vent cap with holes in the ¯ue panel.

3.Secure ¯ue hood to ¯ue panel by inserting a single screw on the right side, the left side, and the top of the hood.

Step 8 Ð Install Gas Piping Ð The gas supply pipe enters the unit through the access hole provided. The gas connection to the unit is made to the 1¤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 NFGC for gas pipe sizing. Do not use cast-iron pipe. It is recommended that a black iron pipe is used. Check the local utility for recommendations concerning existing lines. Size gas supply piping for 0.5 in. wg maximum pressure drop. Never use pipe smaller than the 1¤2-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 applications, the gas pressure must not be less than 4.0 in. wg or greater than 13 in. wg at the unit connection.

An 1¤8-in. NPT plugged tapping accessible for test gage connection must be installed immediately upstream of the gas supply connection to the furnace.

When installing the gas supply line, observe local codes pertaining to gas pipe installations. Refer to the NFGC ANSI Z223.1-1988 NFPA 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 1¤4 inch in every 15 ft to prevent traps. Grade all horizontal 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 appropriate straps, hangers, etc. Use a minimum of one hanger every 6 ft. For pipe sizes larger than 1¤2 in., follow recommendations 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 lique®ed petroleum gases as speci®ed by local and/or national codes.

Never use Te¯on 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 between unit manual shutoff and external manual main shutoff valve.

7.Pressure-test all gas piping in accordance with local and national plumbing and gas codes before connecting piping 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 is 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.

13

Table 1 Ð Physical Data Ð Unit 48SS

UNIT SIZE 48SS		018040		024040		024060		030040		030060		030080		036060		036080		036100		036120
NOMINAL CAPACITY (ton)		11¤2			2		2	21¤2		21¤2		21¤2			3		3		3		3
OPERATING WEIGHT (lb)
Without Base Rail		272		303		315		320		332		332		336		336		348		348
With Optional Base Rail		296		327		339		344		356		356		360		360		372		372
COMPRESSORS		Rotary										Reciprocating
Quantity			1										1
REFRIGERANT (R-22)
Charge (lb)		2.60		2.75		2.75		3.40		3.40		3.40		4.30		4.30		4.30		4.30
REFRIGERANT METERING DEVICE											Acutrol™ Device
Ori®ce ID (in.)		.030		.030		.030		.030		.030		.030		.032		.032		.032		.032
CONDENSER COIL
Rows...Fins/in.		1...	17	1...	17	1...	17	2...	17	2...	17	2...	17	2...	17	2...	17	2...	17	2...	17
Face Area (sq ft)		5.95		5.95		5.95		5.95		5.95		5.95		5.95		5.95		5.95		5.95
CONDENSER FAN
Nominal Cfm		1700		1700		1700		1900		1900		1900		1900		1900		1900		1900
Diameter (in.)			18		18		18		18		18		18		18		18		18		18
Motor Hp (Rpm)		1¤8 (850)		1¤8 (850)		1¤8 (850)		1¤8 (850)		1¤8 (850)		1¤8 (850)		1¤4 (1050)		1¤4 (1050)		1¤4 (1050)		1¤4 (1050)
EVAPORATOR COIL		3	15	3	15	3	15	3	15	3	15	3	15	3	15	3	15	3	15	3	15
Rows Fins/in.
Face Area (sq ft)		1.83		2.29		2.29		2.29		2.29		2.29		3.06		3.06		3.06		3.06
EVAPORATOR FAN											Direct Drive
Nominal Air¯ow (Cfm)		600		800		800		1000		1000		1000		1200		1200		1200		1200
Size (in.)		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		10 x 10
Motor Hp			1¤4		1¤4		1¤4		1¤4		1¤4		1¤4		1¤2		1¤2		1¤2		1¤2
FURNACE SECTION*
Burner Ori®ce (Qty...	drill size)	1	32	1	32	2	40	1	32	2	40	2	32	2	40	2	32	2	30	3	32
Natural Gas
Burner Ori®ce (Qty...	drill size)	1	41	1	41	2	47	1	41	2	47	2	42	2	47	2	42	2	40	3	42
Propane Gas
RETURN-AIR FILTERS (in.)²
Throwaway		20 x 20		20 x 20		20 x 20		20 x 24		20 x 24		20 x 24		20 x 24		20 x 24		20 x 24		20 x 24

UNIT SIZE 48SS		042060		042080			042100		042120		048080		048100		048120		048140			060080		060100		060120		060140
NOMINAL CAPACITY (ton)		31¤2		31¤2			31¤2		31¤2			4		4		4		4			5		5		5		5
OPERATING WEIGHT (lb)
Without Base Rail		375		375			387		387		414		426		426		426			453		465		465		465
With Optional Base Rail		399		399			411		411		438		450		450		450			477		489		489		489
COMPRESSORS					Reciprocating												Hermetic Scroll
Quantity						1													1
REFRIGERANT (R-22)
Charge (lb)		5.20		5.20			5.20		5.20		6.50		6.50		6.50		6.50			7.00		7.00		7.00		7.00
REFRIGERANT METERING													Acutrol Device
DEVICE
Ori®ce ID (in.)		.034		.034			.034		.034		.030		.030		.030		.030			.030		.030		.030		.030
CONDENSER COIL
Rows...Fins/in.		2	...17	2	...17		2	...17	2	...17	2	...17	2	...17	2	...17	2	...17		2	...17	2	...17	2	...17	2	...17
Face Area (sq ft)		7.04		7.04			7.04		7.04		8.67		8.67		8.67		8.67			8.67		8.67		8.67		8.67
CONDENSER FAN
Nominal Cfm		1900		1900			1900		1900		2400		2400		2400		2400			2400		2400		2400		2400
Diameter (in.)			18		18			18		18		20		20		20		20			20		20		20		20
Motor Hp (Rpm)		1¤4 (1050)		1¤4 (1050)			1¤4 (1050)		1¤4 (1050)		1¤3 (1050)		1¤3 (1050)		1¤3 (1050)		1¤3 (1050)			1¤3 (1050)		1¤3 (1050)		1¤3 (1050)		1¤3 (1050)
EVAPORATOR COIL
Rows Fins/in.		3...	15	3...	15		3...	15	3...	15	3...	15	3...	15	3...	15	3...	15		4...	15	4...	15	4...	15	4...	15
Face Area (sq ft)		3.33		3.33			3.33		3.33		4.44		4.44		4.44		4.44			4.44		4.44		4.44		4.44
EVAPORATOR FAN														Direct Drive
Nominal Air¯ow (Cfm)		1400		1400			1400		1400		1600		1600		1600		1600			1995		1995		1995		1995
Size (in.)		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 11		10 x 11		10 x 11		10 x 11
Motor Hp			3 ¤4		3 ¤4			3 ¤4		3 ¤4		3 ¤4		3 ¤4		3 ¤4		3 ¤4			1		1		1		1
FURNACE SECTION*
Burner Ori®ce (Qty...	drill size)	2	40	2	32		2	30	3	32	2	32	2	30	3	32	3	31		2	32	2	30	3	32	3	31
Natural Gas
Burner Ori®ce (Qty...	drill size)	2	47	2	42		2	40	3	42	2	42	2	40	3	42	3	40		3	42	2	40	3	42	3	40
Propane Gas
RETURN-AIR FILTERS (in.)²
Throwaway		24 x 24		24 x 24			24 x 24		24 x 24		24 x 30		24 x 30		24 x 30		24 x 30			24 x 30		24 x 30		24 x 30		24 x 30

*Based on altitude of 0-2000 feet.

²Required ®lter sizes shown are based on the larger of the ARI (Air Conditioning & Refrigeration Institute) rated cooling air¯ow or the heating air¯ow at a velocity of 300 ft/min for throwaway type or 450 ft/min for high-capacity type. For non-standard air ®lters, air ®lter pressure drop must not exceed 0.08 in. wg.

14

Table 2 Ð Physical Data Ð Unit 48SX

UNIT SIZE 48SX		024040		024060		030040		030060			030080			036060		036080		036100		036120
NOMINAL CAPACITY (ton)			2		2	21¤2		21¤2			21¤2				3		3		3		3
OPERATING WEIGHT (lb)
Without Base Rail		333		345		336		348			348			366		366		378		378
With Optional Base Rail		357		369		360		372			372			390		390		402		402
COMPRESSORS											Scroll
Quantity												1
REFRIGERANT (R-22)
Charge (lb)			3.9		3.9		4.5		4.5			4.5			5.4		5.4		5.4		5.4
REFRIGERANT METERING DEVICE										Acutrol™ Device
Ori®ce ID (in.)		.034		.034		.030		.030			.030			.032		.032		.032		.032
CONDENSER COIL
Rows...Fins/in.		2	...17	2	...17	2	...17	2...	17		2...	17		2...	17	2...	17	2...	17	2...	17
Face Area (sq ft)			7.0		7.0		7.0		7.0			7.0			7.0		7.0		7.0		7.0
CONDENSER FAN
Nominal Cfm		2200		2200		2200		2200			2200			2200		2200		2200		2200
Diameter (in.)			20		20		20		20			20			20		20		20		20
Motor Hp (Rpm)		1¤4 (1100)		1¤4 (1100)		1¤4 (1100)		1¤4 (1100)			1¤4 (1100)			1¤4 (1100)		1¤4 (1100)		1¤4 (1100)		1¤4 (1100)
EVAPORATOR COIL		2	15	2	15	3	15	3	15		3	15		4	15	4	15	4	15	4	15
Rows Fins/in.
Face Area (sq ft)			3.6		3.6		2.7		2.7			2.7			3.6		3.6		3.6		3.6
EVAPORATOR FAN*											Direct Drive
Nominal Air¯ow (Cfm)		800		800		1000		1000			1000			1200		1200		1200		1200
Size (in.)		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
Motor Hp			1¤4		1¤4		1¤4		1¤4			1¤4			1¤2		1¤2		1¤2		1¤2
FURNACE SECTION²
Burner Ori®ce (Qty...	drill size)	1	32	2	40	1	32	2	40		2	32		2	40	2	32	2	30	3	32
Natural Gas
Burner Ori®ce (Qty...	drill size)	1	41	2	47	1	41	2	47		2	42		2	47	2	42	2	40	3	42
Propane Gas
RETURN-AIR FILTERS (in.)**
Disposable		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

UNIT SIZE 48SX		042060		042080		042100		042120		048080		048100		048120		048140		060080		060100		060120		060140
NOMINAL CAPACITY (ton)		31¤2		31¤2		31¤2		31¤2			4		4		4		4		5		5		5		5
OPERATING WEIGHT (lb)
Without Base Rail		391		391		403		403		422		434		434		434		453		465		465		465
With Optional Base Rail		415		415		427		427		446		458		458		458		477		489		489		489
COMPRESSORS													Scroll
Quantity													1
REFRIGERANT (R-22)
Charge (lb)			5.7		5.7		5.7		5.7		5.8		5.8		5.8		5.8	7.00		7.00		7.00		7.00
REFRIGERANT METERING												Acutrol Device
DEVICE
Ori®ce ID (in.)		.034		.034		.034		.034		.034		.034		.034		.034		.030		.030		.030		.030
CONDENSER COIL
Rows...Fins/in.		2	...17	2	...17	2	...17	2	...17	2	...17	2	...17	2	...17	2	...17	2	...17	2	...17	2	...17	2	...17
Face Area (sq ft)			8.7		8.7		8.7		8.7		8.7		8.7		8.7		8.7	8.67		8.67		8.67		8.67
CONDENSER FAN
Nominal Cfm		2400		2400		2400		2400		2400		2400		2400		2400		2400		2400		2400		2400
Diameter (in.)			20		20		20		20		20		20		20		20		20		20		20		20
Motor Hp (Rpm)		1¤4 (1100)		1¤4 (1100)		1¤4 (1100)		1¤4 (1100)		1¤4 (1100)		1¤4 (1100)		1¤4 (1100)		1¤4 (1100)		1¤3 (1050)		1¤3 (1050)		1¤3 (1050)		1¤3 (1050)
EVAPORATOR COIL
Rows Fins/in.		3	...15	3	...15	3	...15	3	...15	4	...15	4	...15	4	...15	4	...15	4...	15	4...	15	4...	15	4...	15
Face Area (sq ft)			4.4		4.4		4.4		4.4		4.4		4.4		4.4		4.4	4.44		4.44		4.44		4.44
EVAPORATOR FAN*												Direct Drive
Nominal Air¯ow (Cfm)		1400		1400		1400		1400		1600		1600		1600		1600		1995		1995		1995		1995
Size (in.)		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 11		10 x 11		10 x 11		10 x 11
Motor Hp			3¤4		3¤4		3¤4		3¤4		3¤4		3¤4		3¤4		3¤4		1		1		1		1
FURNACE SECTION²
Burner Ori®ce (Qty...	drill size)	2	40	2	32	2	30	3	32	2	32	2	30	3	32	3	31	2	32	2	30	3	32	3	31
Natural Gas
Burner Ori®ce (Qty...	drill size)	2	47	2	42	2	40	3	42	2	42	2	40	3	42	3	40	3	42	2	40	3	42	3	40
Propane Gas
RETURN-AIR FILTERS (in.)**
Disposable		24 x 30		24 x 30		24 x 30		24 x 30		24 x 30		24 x 30		24 x 30		24 x 30		24 x 30		24 x 30		24 x 30		24 x 30

*Size 048 evaporator fan is equipped with a 460-v or integrated control motor (ICM). Size 060 evaporator fan is equipped with an ICM only. The ICM provides variable speed.

²Based on an altitude of 0-2000 feet.

**Required ®lter sizes shown are based on the ARI (Air Conditioning & Refrigeration Institute) rated heating air¯ow at a velocity of 300 ft/min for throwaway type or 450 ft/min for high-capacity type. For non-standard air ®lters, air ®lter pressure drop must not exceed 0.08 in. wg.

15

(Text continued from page 13)

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

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

Never use a match or other open ¯ame when checking for gas leaks. Never purge gas line into combustion chamber. Failure to follow this warning could result in an explosion causing personal injury or death.

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

Fig. 15 Ð Sediment Trap

Step 9 Ð Install Duct Connections Ð The unit has duct ¯anges on the supplyand return-air openings on the side and bottom of the unit. See Fig. 2-9 for connection sizes and locations.

CONFIGURING UNITS FOR DOWNFLOW (VERTICAL) DISCHARGE

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 service 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 sharp 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 discharge 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).

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 ¯anges 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 secured to the basepan with aluminum tape. Applicable local codes may require aluminum tape to prevent exposed ®berglass.

9.Cover both horizontal duct openings with the duct covers from Steps 2 and 5. Make sure opening is airand watertight.

10.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 installation 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.

16