Carrier 48EJ, 48EW User Manual

48AJ,AK,AW,AY020-060 with Reciprocating Compressor 48EJ,EK,EW,EY024-068 Single Package Rooftop Units Electric Cooling/Gas Heating

Installation, Start-Up and

Service Instructions

CONTENTS

Page SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . 1 INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-58

Step 1 — Provide Unit Support . . . . . . . . . . . . . . . . . . . 1

•ROOF CURB

•ALTERNATE UNIT SUPPORT

Step 2 — Rig and Place Unit . . . . . . . . . . . . . . . . . . . . . 2

•POSITIONING

•ROOF MOUNT

Step 3 — Field Fabricate Ductwork . . . . . . . . . . . . . . . 2

Step 4 — Make Unit Duct Connections . . . . . . . . . . . 2

Step 5 — Install Flue Hood . . . . . . . . . . . . . . . . . . . . . . 28

Step 6 — Trap Condensate Drain . . . . . . . . . . . . . . . . 28

Step 7 — Install Gas Piping . . . . . . . . . . . . . . . . . . . . . 28 Step 8 — Controls Options . . . . . . . . . . . . . . . . . . . . . . 29

•STAGED GAS UNIT APPLICATIONS

•THERMISTORS

•CONSTANT VOLUME APPLICATIONS

•VARIABLE AIR VOLUME (VAV) APPLICATIONS

Step 9 — Make Electrical Connections . . . . . . . . . . 33

•POWER WIRING

•FIELD POWER SUPPLY

•FIELD CONTROL WIRING

Step 10 — Make Outdoor-Air Inlet

Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

•ECONOMIZER

•ECONOMIZER SETTINGS

Step 11 — Position Power Exhaust/Barometric

Relief Damper Hood. . . . . . . . . . . . . . . . . . . . . . . . . . . 52

Step 12 — Install All Accessories . . . . . . . . . . . . . . . 54

Step 13 — Field Modifications. . . . . . . . . . . . . . . . . . . 57

START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58-89

SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89-102

TROUBLESHOOTING. . . . . . . . . . . . . . . . . . . . . . . 103-115

START-UP CHECKLIST . . . . . . . . . . . . . . . . . . . CL-1,CL-2

SAFETY CONSIDERATIONS

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

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

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

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

1.Improper installation, adjustment, alteration, service, or maintenance can cause property damage, personal injury, or loss of life. Refer to the User’s Information Manual provided with this unit for more details.

2.Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance.

What to do if you smell gas:

1.DO NOT try to light any appliance.

2.DO NOT touch any electrical switch, or use any phone in your building.

3.IMMEDIATELY call your gas supplier from a neighbor’s phone. Follow the gas supplier’s instructions.

4.If you cannot reach your gas supplier, call the fire department.

Disconnect gas piping from unit when pressure testing at pressure greater than 0.5 psig. Pressures greater than 0.5 psig will cause gas valve damage resulting in hazardous condition. If gas valve is subjected to pressure greater than 0.5 psig, it must be replaced before use. When pressure testing field-supplied gas piping at pressures of 0.5 psig or less, a unit connected to such piping must be isolated by closing the manual gas valve(s).

INSTALLATION

Step 1 — Provide Unit Support

1.All panels must be in place when rigging.

2.Unit is not designed for handling by fork truck.

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

Book	1	PC 111	Catalog No. 534-739	Printed in U.S.A.	Form 48A,E-1SI	Pg 1	107	11-01	Replaces: 48E-6SI
Tab	1a

ROOF CURB — For vertical discharge units, assemble or install accessory roof curb in accordance with instructions shipped with this accessory. See Fig. 1-4. Install insulation, cant strips, roofing, and counter flashing as shown. Ductwork can be installed to roof curb before unit is set in place. Curb should be level. This is necessary to permit unit drain to function properly. Unit leveling tolerance is shown in Fig. 1-3. Refer to Accessory Roof Curb Installation Instructions for additional information as required. When accessory roof curb is used, unit may be installed on class A, B, or C roof covering material.

IMPORTANT: The gasketing of the unit to the roof curb is critical for a watertight seal. Install gasket with the roof curb as shown in Fig. 1-3. Improperly applied gasket can also result in air leaks and poor unit performance.

ALTERNATE UNIT SUPPORT — When the preferred curb or slab mount cannot be used, support unit with sleepers on perimeter, using unit curb support area. If sleepers cannot be used, support long sides of unit (refer to Fig. 5-16) with a minimum number of 4-in. x 4-in. pads spaced as follows: 48AJ,AK,AW,AY020-030 and 48EJ,EK,EW,EY024-034 units require 3 pads on each side; 48AJ,AK,AW,AY035-050 and 48EJ,EK,EW,EY038-048 units require 4 pads on each side; 48AJ,AK,AW,AY060 and 48EJ,EK,EW,EY054-068 units require 6 pads on each side. Unit may sag if supported by corners only.

Step 2 — Rig and Place Unit — Inspect unit for transportation damage. See Tables 1A and 1B for physical data. File any claim with transportation agency.

Do not drop unit; keep upright. Use spreader bars over unit to prevent sling or cable damage. Level by using unit frame as a reference; leveling tolerance is shown in Fig. 1-3. See Fig. 17 for additional information. Unit operating weight is shown in Table 2.

NOTE: On retrofit jobs, ductwork may be attached to old unit instead of roof curb. Be careful not to damage ductwork when removing old unit. Attach existing ductwork to roof curb instead of unit.

Four lifting lugs are provided on the unit base rails as shown in Fig. 5-16. Refer to rigging instructions on unit.

POSITIONING — Maintain clearance, per Fig. 5-16, around and above unit to provide minimum distance from combustible materials, proper airflow, and service access.

Do not install unit in an indoor location. Do not locate unit air inlets near exhaust vents or other sources of contaminated air. For proper unit operation, adequate combustion and ventilation air must be provided in accordance with Section 5.3 (Air for Combustion and Ventilation) of the National Fuel Gas Code, ANSI Z223.1 (American National Standards Institute).

Although unit is weatherproof, guard against water from higher level runoff and overhangs.

Locate mechanical draft system flue assembly at least 4 ft from any opening through which combustion products could enter the building, and at least 4 ft from any adjacent building.

When unit is located adjacent to public walkways, flue assembly must be at least 7 ft above grade.

ROOF MOUNT — Check building codes for weight distribution requirements. See Fig. 17. Unit operating weight is shown in Table 2.

Step 3 — Field Fabricate Ductwork — Secure all ducts to building structure. Use flexible duct connectors between unit and ducts as required. Insulate and weatherproof all external ductwork, joints, and roof openings with counter flashing and mastic in accordance with applicable codes.

NOTE: Due to width of the horizontal supply/return ductwork, provisions should be made for servicing of the outdoor air filters (i.e., catwalk over ductwork).

Ducts passing through an unconditioned space must be insulated and covered with a vapor barrier. Outlet grilles must not lie directly below unit discharge. The return duct must have a 90-degree elbow before opening into the building space if the unit is equipped with power exhaust.

To attach ductwork to roof curb, insert duct approximately 10 to 11 in. up into roof curb. Connect ductwork to 14-gage roof curb material with sheet metal screws driven from inside the duct.

For vertical supply and return units, tools or parts could drop into ductwork and cause an injury. Install a 90-degree elbow turn in the supply and return ductwork between the unit and the conditioned space. If a 90-degree elbow cannot be installed, then a grille of sufficient strength and density should be installed to prevent objects from falling into the conditioned space.

Step 4 — Make Unit Duct Connections

48AJ,AK,EJ,EK UNITS — Unit is shipped for through-the- bottom duct connections. Field-fabricated ductwork should be attached to the roof curb. Supply and return duct dimensions are shown in Fig. 5-7 and 11-13. Air distribution is shown in Fig. 18 and 19. Refer to installation instructions shipped with roof curb for more information.

48AW,AY,EW,EY UNITS — Remove shipping covers from supply and return air openings. Attach field-supplied ductwork to unit. Connect to the unit with a single duct for all supply openings and with a single duct for all return openings. Splitting of the airflow into branch ducts should not be done at the unit. Sufficient duct length should be used prior to branching to ensure the air temperatures are well mixed within the ductwork. See Fig. 8-10 and 14-16 for duct opening dimensions. Secure all ducts to building structure. Air distribution is shown in Fig. 8-10 and 14-16.

Install accessory barometric relief or power exhaust in the field-fabricated return ductwork. Refer to Step 11 — Position Power Exhaust/Barometric Relief Damper Hood section on page 52 for more information.

Instructions continued on page 28.

2

3

Fig. 1 — Roof Curb — 48AJ,AK020-030 and 48EJ,EK024-034 Units

4

Fig. 2 — Roof Curb — 48AJ,AK034-050 and 48EJ,EK038-048 Units

5

Fig. 3 — Roof Curb — 48AJ,AK060 and 48EJ,EK054-068 Units

NOTES:

1.Unless otherwise specified, all dimensions are to outside of part.

2.Seal strip to be placed covering reference holes.

3.Phantom lines represent seal strip. Total length required is 75 linear ft.

4.If existing seal strip around roof curb seems damaged, replace it. Total length required is 62 linear ft.

5.Five crossrails are field located per dimensions shown and secured using self-tapping screws.

6.48A and 48E series units will overhang existing “DD” or “DF” roof curbs by 2.98″ at indoor motor end and 15.08″ at compressor end.

7.Ductwork (field supplied) must be notched to clear three crossrails.

8. Dimensions in [ ] are millimeters.

6

Fig. 4 — Roof Curb Adapter — (48AJ,AK060 and 48EJ,EK054-068 Units on 48DD,DF054-064 Retrofit, Part No. CRRCADPT005A00)

	NOTES:			OPERATING			CORNER WEIGHT (lbs)
	1.	Weights include economizer (standard).	UNIT SIZE		A	B
				WEIGHT*	(ft-in.)	(ft-in.)	1	2	3	4
	2.	Center of Gravity.		(lbs)
	3.	Do not locate adjacent units with flue discharge facing economizer	48AJ/AK (Low Heat) 020	5142	6- 03/8	3-63/16	1082	1174	1502	1384
			48AJ (High Heat) 020	5222	6- 15/16	3-611/16	1126	1194	1494	1408
		inlet.
		Min Clearances to be:	48AJ/AK (Low Heat) 025	5228	5- 95/8	3-8	1103	1103	1511	1511
		Adjacent Units: 15′-0″ [4572].	48AJ (High Heat) 025	5308	5-103/32	3-85/16	1135	1120	1516	1537
		Top of Units: No Overhang.
		Condenser Coil: 4′-0″ [1219].	48AJ/AK (Low Heat) 027	5325	5- 95/8	3-8	1123	1123	1539	1539
		Economizer Side: 6′-0″ [1829].
		Heat Side: 4′-0″ [1219].	48AJ (High Heat) 027	5405	5-103/32	3-85/16	1156	1140	1544	1565
	4.	Filter Access Side: 10′-0″ [3048]. (For removal of evaporator coil.)	48AJ/AK (Low Heat) 030	5325	5- 95/8	3-8	1123	1123	1539	1539
		For smaller service and operational clearances contact Carrier Appli-	48AJ (High Heat) 030	5405	5-103/32	3-85/16	1156	1140	1544	1565
		cation Engineering Department.

5.Bottom ducts designed to be attached to accessory roof curb. If unit is mounted on dunnage, it is recommended the ducts must be sup-

ported by cross braces as done on accessory roof curb.	UNIT SIZE	OPERATING	A (mm)	B (mm)	CORNER WEIGHT (kg)
6. Dimensions are in inches [mm].		WEIGHT*			1	2	3	4
		(kg)
	48AJ/AK (Low Heat) 020	2332	1839	1072	491	533	681	628
	48AJ (High Heat) 020	2369	1862	1085	511	542	678	639
	48AJ/AK (Low Heat) 025	2371	1768	1118	500	500	686	686
	48AJ (High Heat) 025	2408	1781	1125	515	508	688	697
	48AJ/AK (Low Heat) 027	2415	1768	1118	509	509	698	698
	48AJ (High Heat) 027	2452	1781	1125	524	517	700	710
	48AJ/AK (Low Heat) 030	2415	1768	1118	509	509	698	698
	48AJ (High Heat) 030	2452	1781	1125	524	517	700	710

7

Fig. 5 — Base Unit Dimensions — 48AJ,AK020-030

	NOTES:					OPERATING			CORNER WEIGHT (lbs)
	1.	Weights include economizer (standard).			UNIT SIZE		A	B
						WEIGHT*	(ft-in.)	(ft-in.)	1	2	3	4
	2.	Center of Gravity.				(lbs)
					48AJ/AK (Low Heat) 035	6004	7-811/16	3-107/8	1380	1209	1595	1820
	3.	Do not locate adjacent units with flue discharge facing economizer
		inlet.			48AJ (High Heat) 035	6164	7-101/8	3-113/16	1447	1251	1607	1859
		Min Clearances to be:			48AJ/AK (Low Heat) 040	6514	7-55/16	3-107/8	1442	1264	1779	2030
		Adjacent Units: 15′-0″ [4572].			48AJ (High Heat) 040	6674	7-613/16	3-113/16	1512	1307	1787	2068
		Top of Units: No Overhang.
		Condenser Coil: 4′-0″ [1219].			48AJ/AK (Low Heat) 050	6725	7-311/16	3-101/2	1449	1294	1878	2104
		Economizer Side: 6′-0″ [1829].			48AJ (High Heat) 050	6885	7-53/16	3-1013/16	1519	1337	1886	2142
		′	″	[1219].
		Heat Side: 4 -0
		Filter Access Side: 10′-0″ [3048]. (For removal of evaporator coil.)
	4.	For smaller service and operational clearances contact Carrier Appli-				OPERATING
	5.	cation Engineering Department.			UNIT SIZE		A (mm)	B (mm)	CORNER WEIGHT (kg)
		Bottom ducts designed to be attached to accessory roof curb. If unit is				WEIGHT*			1	2	3	4
		mounted on dunnage, it is recommended the ducts must be supported				(kg)
		by cross braces as done on accessory roof curb.			48AJ/AK (Low Heat) 035	2723	2355	1191	626	548	723	826
	6.	Dimensions are in inches [mm].
					48AJ (High Heat) 035	2796	2390	1199	656	567	729	843
					48AJ/AK (Low Heat) 040	2955	2268	1191	654	573	807	921
					48AJ (High Heat) 040	3027	2306	1199	686	593	811	938
					48AJ/AK (Low Heat) 050	3050	2228	1181	657	587	852	954
					48AJ (High Heat) 050	3123	2266	1189	689	607	856	972

8

Fig. 6 — Base Unit Dimensions — 48AJ,AK035-050

	NOTES:			5. Bottom ducts designed to be attached to accessory roof curb. If unit is mounted
	1. Weights include economizer (standard).			on dunnage, it is recommended the ducts must be supported by cross braces as
	2.	Center of Gravity.		done on accessory roof curb.
				6. Base unit weights include outdoor air hoods and filters (indoor fan motor is not
	3. Do	not locate adjacent units with flue	dis-	included). Add indoor motor, FIOPs and accessories for total operating weight.
				7. VAV motor weights include indoor motor, VFD, compressor electric unloaders,
	charge facing economizer inlet.
				VFD transducer and associated wiring.
	Min Clearances to be:
				8. Dimensions are in inches [mm].
		Adjacent Units: 15′-0″ [4572].
	Top of Units: No Overhang.
	Condenser Coil: 4′-0″ [1219].
	Economizer Side: 6′-0″ [1829].
	Heat Side: 4′-0″ [1219].
	Filter Access Side: 15′-0″ [4572]. (For
	removal of evaporator coil.)
	4. For smaller service and operational clear-
	ances contact Carrier Application Engineer-
	ing Department.

BASE UNIT WEIGHTS (See Note 6) lbs (kg)

			060
48AJD/AKD		8930 (4051)
48AJE		9170 (4159)
		CENTER OF GRAVITY				% OF TOTAL WEIGHT
UNIT SIZE			ft-in.	Millimeters		AT EACH CORNER
		A	B	A	B	1	2	3	4

48AJD/AKD060 10-711/16 3-1019/32 3242 1184 21.7 19.3 27.7 31.2

48AJE060		11-211/16 4-19/32			3422 1235 23.9 19.4 25.4 31.3

9

Fig. 7 — Base Unit Dimensions — 48AJ,AK060

	NOTES:					OPERATING			CORNER WEIGHT (lbs)
	1. Weights include economizer (standard).				UNIT SIZE		A	B
						WEIGHT*	(ft-in.)	(ft-in.)	1	2	3	4
	2.	Center of Gravity.				(lbs)
					48AW/AY (Low Heat) 020	5182	6- 03/8	3-63/16	1090	1183	1514	1395
	3. Do not locate adjacent units with flue discharge facing economizer
		inlet.			48AW (High Heat) 020	5262	6- 15/16	3-611/16 1134		1203	1505	1419
		Min Clearances to be:			48AW/AY (Low Heat) 025	5268	5- 95/8	3-8	1111	1111	1523	1523
		Adjacent Units: 15′-0″ [4572].			48AW (High Heat) 025	5348	5-101/8	3-85/16	1144	1128	1527	1548
		Top of Units: No Overhang.
		Condenser Coil: 4′-0″ [1219].			48AW/AY (Low Heat) 027	5365	5- 95/8	3-8	1132	1132	1551	1551
		Economizer Side: 6′-0″ [1829].			48AW (High Heat) 027	5445	5-101/8	3-85/16	1165	1149	1555	1577
		′	″	[1219].
		Heat Side: 4 -0
		Filter Access Side: 10′-0″ [3048]. (For removal of evaporator coil.)			48AW/AY (Low Heat) 030	5365	5- 95/8	3-8	1132	1132	1551	1551
	4. For smaller service and operational clearances contact Carrier				48AW (High Heat) 030	5445	5-101/8	3-85/16	1165	1149	1555	1577
		Application Engineering Department.
	5. Dimensions are in inches [mm].
					UNIT SIZE	OPERATING	A (mm)	B (mm)	CORNER WEIGHT (kg)
						WEIGHT*			1	2	3	4
						(kg)
					48AW/AY (Low Heat) 020	2351	1839	1072	495	537	687	633
					48AW (High Heat) 020	2387	1862	1085	515	546	683	644
					48AW/AY (Low Heat) 025	2390	1768	1118	504	504	691	691
					48AW (High Heat) 025	2426	1781	1125	519	512	693	702
					48AW/AY (Low Heat) 027	2434	1768	1118	513	513	704	704
					48AW (High Heat) 027	2470	1781	1125	528	521	705	715
					48AW/AY (Low Heat) 030	2434	1768	1118	513	513	704	704
					48AW (High Heat) 030	2470	1781	1125	528	521	705	715

10

Fig. 8 — Base Unit Dimensions — 48AW,AY020-030

NOTES:

1.Weights include economizer (standard).

2. Center of Gravity.

3.Do not locate adjacent units with flue discharge facing economizer inlet.

Min Clearances to be:

Adjacent Units: 15′-0″ [4572].

Top of Units: No Overhang. Condenser Coil: 4′-0″ [1219]. Economizer Side: 6′-0″ [1829]. Heat Side: 4′-0″ [1219].

Filter Access Side: 10′-0″ [3048]. (For removal of evaporator coil.)

4.For smaller service and operational clearances contact Carrier Application Engineering Department.

5.Dimensions are in inches [mm].

11

UNIT SIZE	OPERATING	A	B	CORNER WEIGHT (lbs)
	WEIGHT*	(ft-in.)	(ft-in.)	1	2	3	4
	(lbs)
48AW/AY (Low Heat) 035	6044	7- 811/16	3-107/8	1389	1217	1606	1832
48AW (High Heat) 035	6204	7-101/8	3-113/16	1456	1259	1617	1871
48AW/AY (Low Heat) 040	6554	7- 311/16	3-107/8	1451	1271	1790	2042
48AW (High Heat) 040	6714	7- 613/16	3-113/16	1521	1315	1798	2080
48AW/AY (Low Heat) 050	6765	7- 311/16	3-101/2	1458	1301	1889	2117
48AW (High Heat) 050	6925	7- 53/16	3-1013/16 1528		1345	1897	2155
UNIT SIZE	OPERATING	A (mm)	B (mm)	CORNER WEIGHT (kg)
	WEIGHT*			1	2	3	4
	(kg)
48AW/AY (Low Heat) 035	2741	2355	1191	630	552	728	831
48AW (High Heat) 035	2814	2390	1199	661	571	734	849
48AW/AY (Low Heat) 040	2973	2268	1191	658	577	812	926
48AW (High Heat) 040	3045	2306	1199	690	596	816	944
48AW/AY (Low Heat) 050	3069	2228	1181	661	590	857	960
48AW (High Heat) 050	3141	2266	1189	693	610	860	977

Fig. 9 — Base Unit Dimensions — 48AW,AY035-050

NOTES:

1.Weights include economizer (standard).

2. Center of Gravity.

3.Do not locate adjacent units with flue discharge facing economizer inlet.

Min Clearances to be:

Adjacent Units: 15′-0″ [4572].

Top of Units: No Overhang. Condenser Coil: 4′-0″ [1219]. Economizer Side: 6′-0″ [1829]. Heat Side: 4′-0″ [1219].

Filter Access Side: 15′-0″ [4572]. (For removal of evaporator coil.)

4.For smaller service and operational clearances contact Carrier Application Engineering Department.

12

5.Base unit weights include outdoor air hoods and filters (indoor fan motor is not included). Add indoor motor, FIOPs and accessories for total operating weight.

6.VAV motor weights include indoor motor, VFD, compressor electric unloaders, VFD transducer and associated wiring.

7.Dimensions are in inches [mm].

8.For side-supply/return applications, a single return and supply ductwork connection

is recommended for covering all three return and all three supply openings. The entire area around the duct openings is available for a 1.5″ duct flange attachment.

BASE UNIT WEIGHTS (See Note 6) lbs (kg)

		060
48AWD/AYD	8970 (4069)
48AWE	9210 (4178)
	CENTER OF GRAVITY				% OF TOTAL WEIGHT
UNIT SIZE		ft-in.	Millimeters		AT EACH CORNER
	A	B	A	B	1	2	3	4

48AWD/AYD060 10-711/16 3-1019/32 3242 1184 21.7 19.3 27.7 31.2

48AWE060

11-211/16 4-19/32

3422 1235 23.9 19.4 25.4 31.3

Fig. 10 — Base Unit Dimensions — 48W,AY060

NOTES:

1.Weights include economizer (standard).

2. Center of Gravity.

3.Do not locate adjacent units with flue discharge facing economizer inlet.

Min Clearances to be:

Adjacent Units: 15′-0″ [4572].

Top of Units: No Overhang. Condenser Coil: 4′-0″ [1219]. Economizer Side: 6′-0″ [1829]. Heat Side: 4′-0″ [1219].

Filter Access Side: 10′-0″ [3048]. (For removal of evaporator coil.)

4.For smaller service and operational clearances contact Carrier Application Engineering Department.

5.Bottom ducts designed to be attached to accessory roof curb. If unit is mounted on dunnage, it is recommended the ducts must be supported by cross braces as done on accessory roof curb.

6.Dimensions are in inches [mm].

13

Fig. 11 — Base Unit Dimensions — 48EJ,EK024-034

NOTES:

1.Weights include economizer (standard).

2. Center of Gravity.

3.Do not locate adjacent units with flue discharge facing economizer inlet.

Min Clearances to be:

Adjacent Units: 15′-0″ [4572].

Top of Units: No Overhang. Condenser Coil: 4′-0″ [1219]. Economizer Side: 6′-0″ [1829]. Heat Side: 4′-0″ [1219].

Filter Access Side: 10′-0″ [3048]. (For removal of evaporator coil.)

4.For smaller service and operational clearances contact Carrier Application Engineering Department.

5.Bottom ducts designed to be attached to accessory roof curb. If unit is mounted on dunnage, it is recommended the ducts must be supported by cross braces as done on accessory roof curb.

6.Dimensions are in inches [mm].

14

Fig. 12 — Base Unit Dimensions — 48EJ,EK038-048

NOTES:

1.Weights include economizer (standard).

2. Center of Gravity.

3.Do not locate adjacent units with flue discharge facing economizer inlet.

Min Clearances to be:

Adjacent Units: 15′-0″ [4572].

Top of Units: No Overhang. Condenser Coil: 4′-0″ [1219]. Economizer Side: 6′-0″ [1829]. Heat Side: 4′-0″ [1219].

Filter Access Side: 15′-0″ [4572]. (For removal of evaporator coil.)

4.For smaller service and operational clearances contact Carrier Application Engineering Department.

5.Bottom ducts designed to be attached to accessory roof curb. If unit is mounted on dunnage, it is recommended the ducts must be supported by cross braces as done on accessory roof curb.

6.Base unit weights include outdoor air hoods and filters (indoor fan motor is not included). Add indoor motor, FIOPs and accessories for total operating weight.

7.VAV motor weights include indoor motor, VFD, compressor electric unloaders, VFD transducer and associated wiring.

8.Dimensions in are in inches [mm].

15

BASE UNIT WEIGHTS (See Note 6) lbs (kg)

			054			058			064	068
	48EJD/EKD		6805 (3087)			7055 (3200)			7305 (3314)	7480 (3393)
		48EJE	7045 (3196)			7295 (3309)			7545 (3422)	7720 (3502)

	CENTER OF GRAVITY				% OF TOTAL WEIGHT
UNIT SIZE	Inches		Millimeters		AT EACH CORNER
	A	B	A	B	1	2	3	4
48EJD/EKD054	130.9	46.9	3325	1192	22.4	19.6	27.0	30.9
48EJE054	133.8	47.4	3397	1204	23.1	19.8	26.3	30.7
48EJD/EKD058	132.1	47.5	3354	1207	22.9	19.5	26.5	31.1
48EJE058	139.5	49.6	3544	1260	25.3	19.6	24.1	31.1
48EJD/EKD064	125.3	45.2	3181	1149	20.7	19.6	29.1	30.7
48EJE064	132.2	47.2	3359	1199	22.8	19.7	26.7	30.8
48EJD/EKD068	127.7	46.6	3242	1184	21.7	19.3	27.7	31.2
48EJE068	134.7	48.6	3422	1235	23.9	19.4	25.4	31.3

Fig. 13 — Base Unit Dimensions — 48EJ,EK054-068

NOTES:

1.Weights include economizer (standard).

2. Center of Gravity.

3.Do not locate adjacent units with flue discharge facing economizer inlet.

Min Clearances to be:

Adjacent Units: 15′-0″ [4572].

Top of Units: No Overhang. Condenser Coil: 4′-0″ [1219]. Economizer Side: 6′-0″ [1829]. Heat Side: 4′-0″ [1219].

Filter Access Side: 15′-0″ [4572]. (For removal of evaporator coil.)

4.For smaller service and operational clearances contact Carrier Application Engineering Department.

5.Dimensions in are in inches [mm].

16

Fig. 14 — Base Unit Dimensions — 48EW,EY024-034

NOTES:

1.Weights include economizer (standard).

2. Center of Gravity.

3.Do not locate adjacent units with flue discharge facing economizer inlet.

Min Clearances to be:

Adjacent Units: 15′-0″ [4572].

Top of Units: No Overhang. Condenser Coil: 4′-0″ [1219]. Economizer Side: 6′-0″ [1829]. Heat Side: 4′-0″ [1219].

Filter Access Side: 15′-0″ [4572]. (For removal of evaporator coil.)

4.For smaller service and operational clearances contact Carrier Application Engineering Department.

5.Dimensions in are in inches [mm].

17

Fig. 15 — Base Unit Dimensions — 48EW,EY038-048

NOTES:

1.Weights include economizer (standard).

2. Center of Gravity.

3.Do not locate adjacent units with flue discharge facing economizer inlet.

Min Clearances to be:

Adjacent Units: 15′-0″ [4572].

Top of Units: No Overhang. Condenser Coil: 4′-0″ [1219]. Economizer Side: 6′-0″ [1829]. Heat Side: 4′-0″ [1219].

Filter Access Side: 15′-0″ [4572]. (For removal of evaporator coil.)

4.For smaller service and operational clearances contact Carrier Application Engineering Department.

5.Base unit weights include outdoor air hoods and filters (indoor fan motor is not included). Add indoor motor, FIOPs and accessories for total operating weight.

6.VAV motor weights include indoor motor, VFD, compressor electric unloaders, VFD transducer and associated wiring.

7.For side-supply/return applications, a single return and supply ductwork connection is recommended for covering all three return and all

three supply openings. The entire area around the duct openings is available for a 1.5″ duct flange attachment

8.Dimensions in are in inches [mm].

18

BASE UNIT WEIGHTS (See Note 6) lbs (kg)

		054				058			064			068
48EWD/EYD		6845 (3105)				7095 (3218)			7345 (3332)			7520 (3411)
48EWE		7085 (3214)				7335 (3327)			7585 (3441)			7760 (3520)

	CENTER OF GRAVITY				% OF TOTAL WEIGHT
UNIT SIZE	Inches		Millimeters		AT EACH CORNER
	A	B	A	B	1	2	3	4
48EWD/EYD054	130.9	46.9	3325	1192	22.4	19.6	27.0	30.9
48EWE054	133.8	47.4	3397	1204	23.1	19.8	26.3	30.7
48EWD/EYD058	132.1	47.5	3354	1207	22.9	19.5	26.5	31.1
48EWE058	139.5	49.6	3544	1260	25.3	19.6	24.1	31.1
48EWD/EYD064	125.3	45.2	3181	1149	20.7	19.6	29.1	30.7
48EWE064	132.2	47.2	3359	1199	22.8	19.7	26.7	30.8
48EWD/EYD068	127.7	46.6	3242	1184	21.7	19.3	27.7	31.2
48EWE068	134.7	48.6	3422	1235	23.9	19.4	25.4	31.3

Fig. 16 — Base Unit Dimensions — 48EW,EY054-068

2	A
	3

B

1 4

48AJ,AK,AW,AY UNITS

		CENTER OF GRAVITY					PERCENT OF TOTAL WEIGHT
UNIT	Inches			Millimeters			AT EACH CORNER (%)
	A		B	A	B	1	2	3	4
48AJ,AKD020	72.4		42.2	1839	1072	21.0%	22.8%	29.2%	26.9%
48AJE020	73.3		42.7	1862	1085	21.6%	22.9%	28.6%	27.0%
48AW,AYD020	72.4		42.2	1839	1072	21.0%	22.8%	29.2%	26.9%
48AWE020	73.3		42.7	1862	1085	21.6%	22.9%	28.6%	27.0%
48AJ,AKD025	69.6		44.0	1768	1118	21.1%	21.1%	28.9%	28.9%
48AJE025	70.1		44.3	1781	1125	21.4%	21.1%	28.6%	29.0%
48AW,AYD025	69.6		44.0	1768	1118	21.1%	21.1%	28.9%	28.9%
48AWE025	70.1		44.3	1781	1125	21.4%	21.1%	28.6%	29.0%
48AJ,AKD027	69.6		44.0	1768	1118	21.1%	21.1%	28.9%	28.9%
48AJE027	70.1		44.3	1781	1125	21.4%	21.1%	28.6%	29.0%
48AW,AYD027	69.6		44.0	1768	1118	21.1%	21.1%	28.9%	28.9%
48AWE027	70.1		44.3	1781	1125	21.4%	21.1%	28.6%	29.0%
48AJ,AKD030	69.6		44.0	1768	1118	21.1%	21.1%	28.9%	28.9%
48AJE030	70.1		44.3	1781	1125	21.4%	21.1%	28.6%	29.0%
48AW,AYD030	69.6		44.0	1768	1118	21.1%	21.1%	28.9%	28.9%
48AWE030	70.1		44.3	1781	1125	21.4%	21.1%	28.6%	29.0%
48AJ,AKD035	92.7		46.9	2355	1191	23.0%	20.1%	26.6%	30.3%
48AJE035	94.1		47.2	2390	1199	23.5%	20.3%	26.1%	30.2%
48AW,AYD035	92.7		46.9	2355	1191	23.0%	20.1%	26.6%	30.3%
48AWE035	94.1		47.2	2390	1199	23.5%	20.3%	26.1%	30.2%
48AJ,AKD040	89.3		46.9	2268	1191	22.1%	19.4%	27.3%	31.2%
48AJE040	90.8		47.2	2306	1199	22.7%	19.6%	26.8%	31.0%
48AW,AYD040	89.3		46.9	2268	1191	22.1%	19.4%	27.3%	31.2%
48AWE040	90.8		47.2	2306	1199	22.7%	19.6%	26.8%	31.0%
48AJ,AKD050	87.7		46.5	2228	1181	21.6%	19.2%	27.9%	31.3%
48AJE050	89.2		46.8	2266	1189	22.1%	19.4%	27.4%	31.1%
48AW,AYD050	87.7		46.5	2228	1181	21.6%	19.2%	27.9%	31.3%
48AWE050	89.2		46.8	2266	1189	22.1%	19.4%	27.4%	31.1%
48AJ,AKD060	125.3		45.2	3181	1149	21.7%	19.3%	27.7%	31.2%
48AJE060	132.2		47.2	3359	1199	23.9%	19.4%	25.4%	31.3%
48AW,AYD060	127.7		46.6	3242	1184	21.7%	19.3%	27.7%	31.2%
48AWE060	134.7		48.6	3422	1235	23.9%	19.4%	25.4%	31.3%

Fig. 17 — Rigging Information

19

48EJ,EK,EW,EY UNITS

		CENTER OF GRAVITY					PERCENT OF TOTAL WEIGHT
UNIT	Inches			Millimeters			AT EACH CORNER (%)
	A		B	A	B	1	2	3	4
48EJ,EW,EK,EYD024	72.4		42.2	1839	1072	21.0	22.8	29.2	26.9
48EJ,EWE024	73.3		42.7	1862	1085	21.6	22.9	28.6	27.0
48EJ,EW,EK,EYD028	69.6		44.0	1768	1118	21.1	21.1	28.9	28.9
48EJ,EWE028	70.1		44.3	1781	1125	21.4	21.1	28.6	29.0
48EJ,EW,EK,EYD030	69.6		44.0	1768	1118	21.1	21.1	28.9	28.9
48EJ,EWE030	70.1		44.3	1781	1125	21.4	21.1	28.6	29.0
48EJ,EW,EK,EYD034	69.6		44.0	1768	1118	21.1	21.1	28.9	28.9
48EJ,EWE034	70.1		44.3	1781	1125	21.4	21.1	28.6	29.0
48EJ,EW,EK,EYD038	92.7		46.9	2355	1191	23.0	20.1	26.6	30.3
48EJ,EWE038	94.1		47.2	2390	1199	23.5	20.3	26.1	30.2
48EJ,EW,EK,EYD044	89.3		46.9	2268	1191	22.1	19.4	27.3	31.2
48EJ,EWE044	90.8		47.2	2306	1199	22.7	19.6	26.8	31.0
48EJ,EW,EK,EYD048	87.7		46.5	2228	1181	21.6	19.2	27.9	31.3
48EJ,EWE048	89.2		46.8	2226	1189	22.1	19.4	27.4	31.1
48EJ,EW,EK,EYD054	130.9		46.9	3325	1192	22.4	19.6	27.0	30.9
48EJ,EWE054	133.8		47.4	3397	1204	23.1	19.8	26.3	30.7
48EJ,EW,EK,EYD058	132.1		47.5	3354	1207	22.9	19.5	26.5	31.1
48EJ,EWE058	139.5		49.6	3544	1260	25.3	19.6	24.1	31.1
48EJ,EW,EK,EYD064	125.3		45.2	3181	1149	20.7	19.6	29.1	30.7
48EJ,EWE064	132.2		47.2	3359	1199	22.8	19.7	26.7	30.8
48EJ,EW,EK,EYD068	127.7		46.6	3242	1184	21.7	19.3	27.7	31.2
48EJ,EWE068	134.7		48.6	3422	1235	23.9	19.4	25.4	31.3

RIGGING WEIGHTS

48AJ,AK,AW,AY UNITS

UNIT				MAXIMUM UNIT WEIGHTS (lb)*
	020	025	027		030	035		040	050	060
48AJ,AKD	5142	5228	5325		5325	6004		6514	6725	8930
48AJ,AKE	5222	5308	5405		5405	6164		6674	6885	9170
48AW,AYD	5182	5268	5365		5365	6044		6554	6765	8970
48AW,AYE	5262	5348	5445		5445	6204		6714	6925	9210

*Includes outdoor-air hoods, filters, largest available indoor-fan motor, modulating power exhaust, and the largest available variable frequency drive (VFD).

NOTES:

1. Center of gravity.

2.On 020-050 includes 500 lbs and on 060 725 lbs for modulating power exhaust.

3.On 020-050 includes 170 lbs and on 060 55 lbs for economizer hoods. Includes 45 lbs for the economizer hood packaging.

4.Add 220 lbs for copper coil on the 020-030 size.

5.Add 284 lbs for copper coil on the 035 size.

6.Add 380 lbs for copper coil on the 040-050 size.

7.Add 651 lbs for copper coil on the 060 size.

48EJ,EK,EW,EY UNITS

	UNIT					MAXIMUM UNIT WEIGHTS (lb)*
		024	028	030	034	038	044	048	054	058	064	068
	48EJ,EKD	5142	5228	5304	5304	5943	6237	6622	8029	8377	8755	8930
	48EJE	5222	5384	5384	5384	6103	6397	6782	8269	8617	8995	9170
	48EW,EYD	5182	5404	5344	5344	5983	6277	6662	8069	8417	8795	8970
	48EWE	5262	5492	5424	5424	6143	6437	6822	8309	8657	9035	9210

*Includes outdoor-air hoods, filters, largest available indoor-fan motor, modulating power exhaust, and the largest available variable frequency drive (VFD).

NOTES:

1. Center of gravity.

2.Sizes 024-048 includes 500 lb and sizes 054-068 includes 725 lb for modulating power exhaust.

3.Sizes 024-048 includes 170 lb and sizes 054-068 includes 255 lb for economizer hoods.

4.Economizer hood packaging includes 45 lb.

5.For sizes 024-034 add 220 lb for copper coil.

6.For sizes 038-044 add 284 lb for copper coil.

7.For 048 size add 380 lb for copper coil.

8.For 054 size add 271 lb for copper coil.

9.For 058 size add 407 lb for copper coil.

10.For 064 size add 489 lb for copper coil.

11.For 068 size add 651 lb for copper coil.

Fig. 17 — Rigging Information (cont)

20

Table 1A — Physical Data — 48AJ,AK,AW,AY Units

UNIT 48AJ,AK,AW,AY					020D/E							025D/E							027D/E							030D/E
NOMINAL CAPACITY (tons)			20							25							27							30
BASE UNIT OPERATING WEIGHT (lb)												See Operating Weights Table 2.
COMPRESSOR
Quantity...Type (Ckt 1 , Ckt 2)		1...06D328, 1...06D818									2...06D328							2...06D328					1...06D537, 1…06D328
Number of Refrigerant Circuits			2							2							2							2
Oil (oz) (Ckt 1 , Ckt 2)			115, 88									115 ea.							115 ea.							115 ea.
REFRIGERANT TYPE															R-22
Operating Charge (lb-oz)
Circuit 1			25-0							25-0							29-0							27-0
Circuit 2			31-0							25-0							28-0							29-0
CONDENSER COIL *					Cross-Hatched 3/8" Copper Tubes, Aluminum Lanced, Aluminum Pre-Coated, or Copper Plate Fins
Quantity			1							1							1							1
Rows...Fins/in.			4...15							4...15							4...15							4...15
Total Face Area (sq ft)			33.3							33.3							33.3							33.3
CONDENSER FAN															Propeller Type
Nominal Cfm			13,420							13,420							13,420							13,420
Quantity...Diameter (in.)			2...30							2...30							2...30							2...30
Motor Hp			1							1							1							1
EVAPORATOR COIL										Cross-Hatched Copper Tubes, Aluminum Plate Fins
Tube Size (in.)			3/8							3/8							3/8							3/8
Rows...Fins/in.			4...15							4...15							4...15							4... 5
Total Face Area (sq ft)			31.7							31.7							34.7							34.7
EVAPORATOR FAN															Centrifugal Type
Quantity...Size (in.)				2...20 X 15						2... 20 X 15							2... 20 X 15							2... 20 X 15
Type Drive					Belt							Belt							Belt							Belt
Nominal Cfm			8,000							10,000							11,000							12,000
Motor Hp		5			10			15	7.5			10			15	10			15			20	10			15			20
Motor Frame Size		184T			215T			254T	213T			215T			254T	215T			254T			256T	215T			254T			256T
Motor Bearing Type					Ball							Ball							Ball							Ball
Maximum Allowable Rpm			1200							1200							1200							1200
Motor Pulley Pitch Diameter		4.9			4.4			5.7	5.4			6.1			5.5	4.4			4.9			5.9	4.4			5.7			5.9
Nominal Motor Shaft Diameter (in.)		11/8			13/8			13/8	13/8			13/8			15/8	13/8			15/8			15/8	13/8			15/8			15/8
Fan Pulley Pitch Diameter (in.)		12.4			8.6			9.1	12.4			11.1			8.7	9.4			8.1			8.7	9.0			9.1			8.7
Nominal Fan Shaft Diameter (in.)					115/16							115/16							115/16							115/16
Belt Quantity		1			2			2	1			1			2	2			2			2	2			2			2
Belt Type		BX56			BX50			5VX530	BX56			5VX590			5VX570	BX50			5VX500			5VX530	BX50			5VX530			5VX530
Belt Length (in.)		56			63			53	56			59			57	50			50			53	50			53			53
Pulley Center Line Distance (in.)		16.0-18.7			15.6-18.4		15.0-17.9		15.6-18.4			15.6-18.4		15.0-17.9		15.6-18.4			15.0-17.9		15.0-17.9		15.6-18.4			15.0-17.9		15.0-17.9
Factory Speed Setting (rpm)		717			924			1096	773			962			1106	848			1059			1187	884			1096			1187
FURNACE SECTION
Rollout Switch Cutout
Temp (F) †			225							225							225							225
Burner Orifice Diameter	(in. ...drill size)
Natural Gas	Std		.111...34							.111...34							.111...34							.111...34
Liquid Propane	Alt		.089...43							.089...43							.089...43							.089...43
Thermostat Heat Anticipator Setting
Stage 1 (amps)			0.1							0.1							0.1							0.1
Stage 2 (amps)			0.1							0.1							0.1							0.1
Gas Input (Btuh)	Stage 1		262,500/394,000							262,500/394,000							262,500/394,000							262,500/394,000
	Stage 2		350,000/525,000							350,000/525,000							350,000/525,000							350,000/525,000
Efficiency (Steady State) (%)			82							82							82							82
Temperature Rise Range			15-45/35-65							15-45/35-65							15-45/35-65							15-45/35-65
Manifold Pressure (in. wg)
Natural Gas	Std		3.5							3.5							3.5							3.5
Liquid Propane	Alt		3.5							3.5							3.5							3.5
Gas Valve Quantity			2							2							2							2
HIGH-PRESSURE SWITCH (psig)
Cutout			426							426							426							426
Reset (Auto.)			320							320							320							320
LOW-PRESSURE SWITCH (psig)
Cutout			27							27							27							27
Reset (Auto.)			67							67							67							67
RETURN-AIR FILTERS
Quantity...Size (in.)			10...20 x 24 x 2							10...20 x 24 x 2							10...20 x 24 x 2							10...20 x 24 x 2
OUTDOOR AIR FILTERS					8...16 x 25							8...16 x 25							8...16 x 25							8...16 x 25
Quantity...Size (in.)					4...20 x 25							4...20 x 25							4..20 x 25							4...20 x 25

		LEGEND
Al	—	Aluminum
Bhp	—	Brake Horsepower
Cu	—	Copper

*Sizes 020-030: Circuit 1 uses the lower portion of condenser coil, Circuit 2 uses the upper portion.

Sizes 035-050: Circuit 1 uses the left condenser coil, Circuit 2 the right. All units have intertwined evaporator coils.

†Rollout switch is manual reset.

NOTE: High heat is for 48AJ,AW only.

21

Table 1A — Physical Data — 48AJ,AK,AW,AY Units (cont)

UNIT 48AJ,AK,AW,AY					035D/E						040D/E							050D/E							060D/E
NOMINAL CAPACITY (tons)			35						40							50							60
BASE UNIT OPERATING WEIGHT (lb)											See Operating Weights Table 2.
COMPRESSOR
Quantity...Type (Ckt 1 , Ckt 2)					2...06D537			1...06D537, 1...06EA250								2…06EA250								2...06EA265
Number of Refrigerant Circuits			2						2							2							2
Oil (oz) (Ckt 1 , Ckt 2)					115 ea.				115, 224									224 ea.							304 ea.
REFRIGERANT TYPE
Operating Charge (lb-oz)
Circuit 1			34-8						51-8							50-0							79-8
Circuit 2			34-8						49-8							50-0							79-8
CONDENSER COIL *						Cross-Hatched 3/8" Copper Tubes, Aluminum Lanced, Aluminum Pre-Coated, or Copper Plate Fins
Quantity			2						2							2							2
Rows...Fins/in.			3...15						4...15							4...15									4…15
Total Face Area (sq ft)			58.3						66.7							66.7							100
CONDENSER FAN														Propeller Type
Nominal Cfm			27,064						27,064							27,064							43,900
Quantity...Diameter (in.)			4...30						4...30							4...30							6...30
Motor Hp			1						1							1							1
EVAPORATOR COIL									Cross-Hatched Copper Tubes, Aluminum Plate Fins
Tube Size (in.)			3/8						1/2							1/2							1/2
Rows...Fins/in.			4...15						6...15							6...15							4...17
Total Face Area (sq ft)			34.7						31.3							31.3							48.1
EVAPORATOR FAN														Centrifugal Type
Quantity...Size (in.)					2...20 X 15						2...20 X 15							2...20 X 15							3...20 X 15
Type Drive					Belt						Belt							Belt							Belt
Nominal Cfm			14,000						16,000							20,000							24,000
Motor Hp		10			15		20	15			20			25	20			25			30	25			30			40
Motor Frame Size		215T			254T		256T	254T			256T			284T	256T			284T			286T	284T			286T			324T
Motor Bearing Type					Ball						Ball							Ball							Ball
Maximum Allowable Rpm			1200						1200							1300							1200
Motor Pulley Pitch Diameter		6.1			5.3		5.7	5.3			5.7			7.5	6.3			8.1			7.5	5.3			8.1			9.4
Nominal Motor Shaft Diameter (in.)		13/8			15/8		15/8	15/8			15/8			17/8	15/8			17/8			17/8	17/8			17/8			21/8
Fan Pulley Pitch Diameter (in.)		13.7			9.5		9.5	9.5			9.5			11.1	11.1			12.5			11.1	9.1			12.5			13.6
Nominal Fan Shaft Diameter (in.)					115/16						115/16							115/16							115/16
Belt Quantity		1			2		2	2			2			2	2			2			2	3			3			2
Belt Type		5VX610			5VX530		5VX550	5VX530			5VX550			5VX590	5VX570			5VX630			5VX590	5VX530			5VX630			5VX650
Belt Length (in.)		61			53		55	53			55			59	57			63			59	53			63			65
Pulley Center Line Distance (in.)		15.6-18.4			15.0-17.9		15.0-17.9	15.0-17.9			15.0-17.9		14.6-17.6		15.0-17.9			14.6-17.6		14.6-17.6		15.2-17.5			14.7-17.2		14.2-17.0
Factory Speed Setting (rpm)		779			976		1050	976			1050			1182	993			1134			1182	1019			1134			1214
FURNACE SECTION
Rollout Switch Cutout
Temp (F) †			225						225							225							225
Burner Orifice Diameter (in. ...drill size)
Natural Gas	Std		.120...31						.120...31							.120...31							.120...31
Liquid Propane	Alt		.096...41						.096...41							.096...41							.096...41
Thermostat Heat Anticipator Setting
Stage 1 (amps)			0.1						0.1							0.1							0.1
Stage 2 (amps)			0.1						0.1							0.1							0.1
Gas Input (Btuh)	Stage 1	300,000/600,000						300,000/600,000							300,000/600,000							582,000/ 873,000
	Stage 2	400,000/800,000						400,000/800,000							400,000/800,000							776,000/1,164,000
Efficiency (Steady State) (%)			82						82							82							82
Temperature Rise Range			10-40/30-60						10-40/30-60							10-40/30-60							10-40/30-60
Manifold Pressure	(in. wg)
Natural Gas	Std		3.5						3.5							3.5							3.3
Liquid Propane	Alt		3.5						3.5							3.5							3.3
Gas Valve Quantity			2						2							2							3
HIGH-PRESSURE SWITCH (psig)
Cutout			426						426							426							426
Reset (Auto.)			320						320							320							320
LOW-PRESSURE SWITCH (psig)
Cutout			27						27							27							27
Reset (Auto.)			67						67							67							67
RETURN-AIR FILTERS
Quantity...Size (in.)			10...20 x 24 x 2						10...20 x 24 x 2							10...20 x 24 x 2							16...20 x 24 x 2
OUTDOOR AIR FILTERS					8...16 x 25						8...16 x 25							8...16 x 25							12...16 x 25
Quantity...Size (in.)					4...20 x 25						4...20 x 25							4...20 x 25							6...20 x 25

		LEGEND
Al	—	Aluminum
Bhp	—	Brake Horsepower
Cu	—	Copper

*Sizes 020-030: Circuit 1 uses the lower portion of condenser coil, Circuit 2 uses the upper portion.

Sizes 035-050: Circuit 1 uses the left condenser coil, Circuit 2 the right. All units have intertwined evaporator coils.

†Rollout switch is manual reset.

NOTE: High heat is for 48AJ,AW only.

22

Table 1B — Physical Data — 48EJ,EK,EW,EY Units

UNIT 48EJ,EK,EW,EY				024D/E							028D/E							030D/E							034D/E
NOMINAL CAPACITY (tons)			20						25								27.5							30
OPERATING WEIGHT (lb)											For Operating Weights see Table 2.
COMPRESSOR
Type Ckt 1				06D328							06D328							06D537							06D537
Ckt 2				06D818							06D328							06D328							06D537
Number of Refrigerant Circuits			2						2								2							2
Oil (oz) (Ckt 1, Ckt 2)			115, 88								115 ea.							115 ea.							115 ea.
REFRIGERANT TYPE															R-22
Operating Charge (lb-oz)
Circuit 1*			25-0						25-0								25-0							25-0
Circuit 2			31-0						25-0								25-0							25-0
CONDENSER COIL							Cross-Hatched 3/8″ Copper Tubes, Aluminum Lanced, Aluminum Pre-Coated, or Copper Plate Fins
Quantity			1						1								1							1
Rows...Fins/in.			4...15						4...15								4...15							4...15
Total Face Area (sq ft)			33.3						33.3								33.3							33.3
CONDENSER FAN														Propeller Type
Nominal Cfm			13,420						13,420								13,420							13,420
Quantity...Diameter (in.)			2...30						2...30								2...30							2...30
Motor Hp (1075 Rpm)			1						1								1							1
EVAPORATOR COIL								Cross-Hatched 3/8″ Copper Tubes,								Aluminum Plate Fins, Intertwined Circuits
Rows...Fins/in.			4...15						4...15								4...15							4...15
Total Face Area (sq ft)			31.7						31.7								31.7							31.7
EVAPORATOR FAN														Centrifugal Type
Quantity...Size (in.)				2...20x15							2...20x15							2...20x15							2...20x15
Type Drive				Belt							Belt							Belt							Belt
Nominal Cfm			8,000						10,000								11,000							12,000
Motor Hp		5		10†			15	7.5			10†			15		10		15†			20		10		15†			20
Motor Frame Size (Standard)		S184T		S215T			D254T	S213T			S215T			D254T		S215T		D254T			S256T		S215T		D254T			S256T
(High Efficiency)		S184T		S215T			S254T	S213T			S215T			S254T		S215T		S254T			S256T		S215T		S254T			S256T
Motor Bearing Type				Ball							Ball							Ball							Ball
Maximum Allowable Rpm			1200						1200								1200							1200
Motor Pulley Pitch Diameter		4.9		4.4			5.7	5.4			6.1			5.5		4.4		4.9			5.9		4.4		5.7			5.9
Nominal Motor Shaft Diameter (in.)		11/8		13/8			15/8	13/8			13/8			15/8		13/8		15/8			15/8		13/8		15/8			15/8
Fan Pulley Pitch Diameter (in.)		12.4		8.6			9.1	12.4			11.1			8.7		9.4		8.1			8.7		9.0		9.1			8.7
Nominal Fan Shaft Diameter (in.)				115/16							115/16							115/16							115/16
Belt, Quantity...Type		1...BX56		2...BX50		2...5VX530		1...BX56			1...5VX570			2...5VX530		2...BX50		2...5VX500		2...5VX530		2...BX50			2...5VX530		2...5VX530
Belt, Length (in.)		56		50			53	56			59			57		50		50			53		50		53			53
Pulley Center Line Distance (in.)		16.0-18.7		15.6-18.4		15.0-17.9		15.6			-18.4			15.0-17.9		15.6-18.4		15.0-17.9					15.6-18.4		15.0-17.9
Factory Speed Setting (rpm)		717		924			1096	773			962			1106		848		1059			1187		884		1096			1187
FURNACE SECTION
Rollout Switch Cutout Temp (F)**			225						225								225							225
Burner Orifice Diameter
(in. ...drill size)
Natural Gas	Std		.111...34						.111...34								.111...34							.111...34
Liquid Propane	Alt		.089...43						.089...43								.089...43							.089...43
Thermostat Heat Anticipator
Setting (amps)
Stage 1			0.1						0.1								0.1							0.1
Stage 2			0.1						0.1								0.1							0.1
Gas Input (Btuh)	Stage 1 Low		265,600						265,600								265,600							265,600
	High		398,400						398,400								398,400							398,400
	Stage 2 Low		350,000						350,000								350,000							350,000
	High		525,000						525,000								525,000							525,000
Efficiency (Steady State) (%)			82						82								82							82
Temperature Rise Range			15-45/35-65						15-45/35-65								15-45/35-65							15-45/35-65
Gas Pressure to Unit Range (in. wg)			5-13.5						5-13.5								5-13.5							5-13.5
Manifold Pressure (in. wg)
Natural Gas	Std		3.5						3.5								3.5							3.5
Liquid Propane	Alt		3.5						3.5								3.5							3.5
Gas Valve Quantity			2						2								2							2
Field Gas Connection Size
(in.-FPT)			1.5						1.5								1.5							1.5
HIGH-PRESSURE SWITCH (psig)
Cutout			426						426								426							426
Reset (Auto.)			320						320								320							320
LOW-PRESSURE SWITCH (psig)
Cutout			7						7								7							7
Reset (Auto.)			22						22								22							22
RETURN-AIR FILTERS (W x H x T)
Quantity...Size (in.)			10...20 x 24 x 2						10...20 x 24 x 2								10...20 x 24 x 2							10...20 x 24 x 2
OUTDOOR-AIR FILTERS				8...16 x 25							8...16 x 25							8...16 x 25							8...16 x 25
Quantity...Size (in.)				4...20 x 25							4...20 x 25							4...20 x 25							4...20 x 25
POWER EXHAUST							Direct Drive, 3-Speed, Single-Phase Motor (Factory-Wired for High Speed) and Forward Curved Fan
Motor, Quantity...Hp															4...1
Fan, Diameter...Width (in.)															11...10

*Sizes 024-034: Circuit 1 uses the lower portion of condenser coil, Circuit 2 uses the upper portion.

Sizes 038-048: Circuit 1 uses the left condenser coil, Circuit 2 the right. All units have intertwined evaporator coils. †Motor and drive shown will deliver approximately 2.5 in. wg net external static. For more information, see Table 3. **Rollout switch is manual reset.

NOTE: High heat is for 48EJ,EW only.

23

Table 1B — Physical Data — 48EJ,EK,EW,EY Units (cont)

UNIT 48EJ,EK,EW,EY				034D/E						044D/E							048D/E
NOMINAL CAPACITY (tons)			35						40								45
OPERATING WEIGHT (lb)								For Operating Weights see Table 2.
COMPRESSOR
Type Ckt 1				06D537						06EA250							06EA265
Ckt 2				06D537						06EA250							06EA250
Number of Refrigerant Circuits			2						2								2
Oil (oz) (Ckt 1, Ckt 2)				115 ea.						224 ea.							304, 224
REFRIGERANT TYPE										R-22
Operating Charge (lb-oz)
Circuit 1*			34-0						35-0								41-0
Circuit 2			34-0						35-0								41-0
CONDENSER COIL				Cross-Hatched 3/8″ Copper Tubes, Aluminum Lanced, Aluminum Pre-Coated, or Copper Plate Fins
Quantity			2						2					1			1
Rows...Fins/in.			4...15						4...15					4...15			3...15
Total Face Area (sq ft)			58.3						58.3								66.7
CONDENSER FAN										Propeller Type
Nominal Cfm			27,064						27,064								27,064
Quantity...Diameter (in.)			4...30						4...30								4...30
Motor Hp (1075 Rpm)			1						1								1
EVAPORATOR COIL							Cross-Hatched	3/8″ Copper Tubes, Aluminum Plate Fins, Intertwined Circuits
Rows...Fins/in.			3...15						3...15								4...15
Total Face Area (sq ft)			34.7						34.7								34.7
EVAPORATOR FAN										Centrifugal Type
Quantity...Size (in.)				2...20x15						2...20x15							2...20x15
Type Drive				Belt						Belt							Belt
Nominal Cfm			14,000						16,000								18,000
Motor Hp		10		15†			20	15		20†			25	20			25†			30
Motor Frame Size (Standard)		S215T		D254T			S256T	D254T		S256T			S284T	S256T			S284T			S286T
(High Efficiency)		S215T		S254T			S256T	S254T		S256T			S284T	S256T			S284T			S286T
Motor Bearing Type				Ball						Ball							Ball
Maximum Allowable Rpm			1200						1200								1200
Motor Pulley Pitch Diameter		6.1		5.3			5.7	5.3		5.7			7.5	6.3			8.1			7.5
Nominal Motor Shaft Diameter (in.)		13/8		15/8			15/8	15/8		15/8			17/8	15/8			17/8			17/8
Fan Pulley Pitch Diameter (in.)		13.7		9.5			9.5	9.5		9.5			11.1	11.1			12.5			11.1
Nominal Fan Shaft Diameter (in.)				115/16						115/16							115/16
Belt, Quantity...Type		1...5VX610		2...5VX530			2...5VX550	2...5VX530		2...5VX550			2...5VX590	2...5VX570			2...5VX630			2...5VX590
Belt, Length (in.)		61		53			55	53		55			59	57			63			59
Pulley Center Line Distance (in.)		15.6-18.4		15.0		-17.9		15.0		-17.9			14.6-17.6	15.0-17.9			14.6-17.6
Factory Speed Setting (rpm)		779		976			1050	976		1050			1182	993			1134			1182
FURNACE SECTION
Rollout Switch Cutout Temp (F)**			225						225								225
Burner Orifice Diameter
(in. ...drill size)
Natural Gas	Std		.120...31						.120...31								.120...31
Liquid Propane	Alt		.096...41						.096...41								.096...41
Thermostat Heat Anticipator
Setting (amps)
Stage 1			0.1						0.1								0.1
Stage 2			0.1						0.1								0.1
Gas Input (Btuh)	Stage 1 Low		303,500						303,500								303,500
	High		607,000						607,000								607,000
	Stage 2 Low		400,000						400,000								400,000
	High		800,000						800,000								800,000
Efficiency (Steady State) (%)			82						82								82
Temperature Rise Range			10-40/30-60						10-40/30-60								10-40/30-60
Gas Pressure to Unit Range (in. wg)			5-13.5						5-13.5								5-13.5
Manifold Pressure (in. wg)
Natural Gas	Std		3.5						3.5								3.5
Liquid Propane	Alt		3.5						3.5								3.5
Gas Valve Quantity			2						2								2
Field Gas Connection Size
(in.-FPT)			1.5						1.5								1.5
HIGH-PRESSURE SWITCH (psig)
Cutout			426						426								426
Reset (Auto.)			320						320								320
LOW-PRESSURE SWITCH (psig)
Cutout			7						7								7
Reset (Auto.)			22						22								22
RETURN-AIR FILTERS (W x H x T)
Quantity...Size (in.)				10...20 x 24 x 2						10...20 x 24 x 2							10...20 x 24 x 2
OUTDOOR-AIR FILTERS				8...16 x 25						8...16 x 25							8...16 x 25
Quantity...Size (in.)				4...20 x 25						4...20 x 25							4...20 x 25
POWER EXHAUST				Direct Drive, 3-Speed, Single-Phase Motor (Factory-Wired for High Speed) and Forward Curved Fan
Motor, Quantity...Hp									4...1
Fan, Diameter...Width (in.)									11...10

*Sizes 024-034: Circuit 1 uses the lower portion of condenser coil, Circuit 2 uses the upper portion.

Sizes 038-048: Circuit 1 uses the left condenser coil, Circuit 2 the right. All units have intertwined evaporator coils. †Motor and drive shown will deliver approximately 2.5 in. wg net external static. For more information, see Table 3. **Rollout switch is manual reset.

NOTE: High heat is for 48EJ,EW only.

24

Table 1B — Physical Data — 48EJ,EK,EW,EY Units (cont)

UNIT 48EJ,EK,EW,EY				054D/E							058D/E								064D/E							068D/E
NOMINAL CAPACITY (tons)				50							55						60							65
OPERATING WEIGHT (lb)												For Operating Weights see Table 2.
COMPRESSOR
Quantity...Type (Ckt 1, Ckt 2)		1...06EA265, 1...06EA250							1...06EA275, 1...06EA250							1...06EA275, 1...06EA265									2...06EA275
Number of Refrigerant Circuits				2							2						2							2
Oil (oz) (Ckt 1, Ckt 2)				304, 224							304, 224						304, 304							304, 304
REFRIGERANT TYPE															R-22
Operating Charge (lb-oz)
Circuit 1*				50-11							57-0						68-0							81-0
Circuit 2				46-8							48-6						68-0							73-0
CONDENSER COIL						Cross-Hatched			3/8″-in. Copper Tubes, Aluminum Lanced, Aluminum Pre-Coated, or Copper Plate Fins
Quantity		1				1			1				1				2							2
Rows...Fins/in.		3...15				2...15			3...15				2...15				3...15							4...15
Total Face Area (sq ft)				66.6							100.0						100							100
CONDENSER FAN															Propeller Type
Nominal Cfm				30,000							43,900						43,900							43,900
Quantity...Diameter (in.)				4...30							6...30						6...30							6...30
Motor Hp (1075 Rpm)				1							1						1							1
EVAPORATOR COIL								Cross-Hatched 1/2″-in. Copper Tubes, Aluminum Plate Fins, Intertwined Circuits
Rows...Fins/in.				4...17							4...17						4...17							4...17
Total Face Area (sq ft)				45.0							45.0						48.1							48.1
EVAPORATOR FAN															Centrifugal Type
Quantity...Size (in.)				3...20x15							3...20x15								3...20x15							3...20x15
Type Drive				Belt							Belt								Belt							Belt
Nominal Cfm				20,000							22,000						24,000							26,000
Motor Hp		15		20†				25	20		25†				30	25			30†			40	25			30†			40
Motor Frame Size		S254T		S256T				S284T	S256T		S284T				S286T	S284T			S286T			S324T	S284T			S286T			S324T
Motor Bearing Type				Ball							Ball								Ball							Ball
Maximum Allowable Rpm				1200							1200						1200							1200
Motor Pulley Pitch Diameter		4.7		6.1				8.1	5.9		6.7				7.5	5.3			8.1			9.4	6.7			5.9			9.4
Nominal Motor Shaft Diameter (in.)		15/8		15/8				17/8	15/8		17/8				17/8	17/8			17/8			21/8	17/8			17/8			21/8
Fan Pulley Pitch Diameter (in.)		11.1		11.1				12.5	11.1		11.1				11.1	9.1			12.5			13.6	12.5			9.5			13.6
Nominal Fan Shaft Diameter (in.)				115/16							115/16								115/16							115/16
Belt, Quantity...Type		2...5VX550		2...5VX570				2...5VX630	2...5VX570		2...5VX590				2...5VX590	3...5VX530			2...5VX630		2...5VX650		2...5VX610			3...5VX550		2...5VX650
Length (in.)		55		57				63	57		59				59	53			63			65	61			55			59
Pulley Center Line Distance (in.)		15.2-17.5		15.2-17.5				14.7-17.2	15.2-17.5		14.7-17.2				14.7-17.2	14.7-17.2			14.7-17.2		14.2-17.0		14.7-17.2			14.7-17.2			14.3-17.0
Factory Speed Setting (rpm)		741		962				1134	930		1056				1182	1019			1134			1214	938			1087			1214
FURNACE SECTION
Rollout Switch Cutout Temp (F)**				225							225						225							225
Burner Orifice Diameter
(in. ...drill size)
Natural Gas	Std			.120...31							.120...31						.120...31							.120...31
Liquid Propane	Alt			.096...41							.096...41						.096...41							.096...41
Thermostat Heat Anticipator
Setting (amps)
Stage 1				0.1							0.1						0.1							0.1
Stage 2				0.1							0.1						0.1							0.1
Gas Input (Btuh)	Stage 1	441,000/ 873,000							441,000/ 873,000							441,000/ 873,000							441,000/ 873,000
	Stage 2	662,400/1,164,000							662,400/1,164,000							662,400/1,164,000							662,400/1,164,000
Efficiency (Steady State) (%)				82							82						82							82
Temperature Rise Range		10-40/30-60							10-40/30-60								10-40/30-60							10-40/30-60
Gas Pressure to Unit Range (in. wg)				5 - 13.5							5 - 13.5						5 - 13.5							5 - 13.5
Manifold Pressure (in. wg)
Natural Gas	Std			3.3							3.3						3.3							3.3
Liquid Propane	Alt			3.3							3.3						3.3							3.3
Gas Valve Quantity				3							3						3							3
Field Gas Connection Size
(in.-FPT)				2.5							2.5						2.5							2.5
HIGH-PRESSURE SWITCH (psig)
Cutout				426							426						426							426
Reset (Auto.)				320							320						320							320
LOW-PRESSURE SWITCH (psig)
Cutout				7							7						7							7
Reset (Auto.)				22							22						22							22
RETURN-AIR FILTERS (W x H x T)
Quantity...Size (in.)		16...20 x 24 x 2							16...20 x 24 x 2								16...20 x 24 x 2							16...20 x 24 x 2
OUTDOOR-AIR FILTERS				12...16 x 25							12...16 x 25								12...16 x 25							12...16 x 25
Quantity...Size (in.)				6...20 x 25							6...20 x 25								6...20 x 25							6...20 x 25
POWER EXHAUST								Direct Drive, 3-Speed, Single-Phase Motor (Factory-Wired for High Speed) and Forward Curved Fan
Motor, Quantity...Hp													6...1
Fan, Diameter...Width (in.)													11...10

*Circuit 1 uses the left condenser coil. Circuit 2 the right. All units have intertwined evaporator coils.

†Motor and drive shown will deliver approximately 2.5 in. wg net external static pressure. For more information see Table 3. **Rollout switch is manual reset.

NOTE: High heat is for 48EJ,EW.

25

Table 2 — Operating Weights

48AJ,AK,AW,AY Units

UNIT				BASE UNIT WEIGHTS (Lb)*
	020	025	027		030	035		040	050	060
48AJD,AKD	4287	4373	4394		4394	5073		5515	5628	7480
48AJE	4367	4453	4474		4474	5233		5675	5788	7720
48AWD,AYD	4327	4413	4434		4434	5113		5555	5668	7520
48AWE	4407	4493	4514		4514	5273		5715	5828	7760

OPTION/			OPTION/ACCESSORY WEIGHTS (Lb)
ACCESSORY	020	025	027	030	035	040	050	060
Barometric Relief	300	300	300	300	300	300	300	450
Power Exhaust	450	450	450	450	450	450	450	675
Modulating Power Exhaust	500	500	500	500	500	500	500	725
Cu Tubing/Cu Fin Condenser Coil	220	220	220	220	285	285	380	651
Roof Curb (14-in. curb)	365	365	365	365	410	410	410	585

48EJ,EK,EW,EY Units

	UNIT					BASE UNIT WEIGHTS (Lb)*
		024	028	030	034	038	044	048	054	058	064	068
	48EJ,EKD	4287	4373	4373	4373	5012	5238	5525	6805	7055	7305	7480
	48EJE	4367	4453	4453	4453	5172	5398	5685	7045	7295	7545	7720
	48EW,EYD	4327	4413	4413	4413	5052	5278	5565	6845	7095	7345	7520
	48EWE	4407	4493	4493	4493	5212	5438	5725	7085	7335	7585	7760

OPTION/				OPTION/ACCESSORY WEIGHTS (Lb)
ACCESSORY	024	028	030	034	038	044	048	054	058	064	068
Barometric Relief	300	300	300	300	300	300	300	450	450	450	450
Power Exhaust	450	450	450	450	450	450	450	675	675	675	675
Modular Power Exhaust	500	500	500	500	500	500	500	725	725	725	725
Cu Tubing/Cu Fin Condenser Coil	220	220	220	220	285	285	380	271	407	489	651
Roof Curb (14-in. curb)	365	365	365	365	410	410	410	585	585	585	585

CV MOTOR WEIGHTS (Lb)

MOTOR		UNIT		STANDARD	HIGH
				EFFICIENCY	EFFICIENCY
	HP	VOLTAGE
				IFM	IFM
	5	230/460		78	94
		575		78	92
	7.5	230/460		107	135
		575		107	136
	10	230/460		118	164
		575		118	156
	15	230/460		150	217
		575		150	220
	20	230/460		212	250
		575		212	258
	25	230/460		240	309
		575		240	319
	30	230/460		283	355
		575		283	359
	40	230/460		372	415
		575		372	410
	LEGEND
Cu	— Copper
CV	— Constant Volume
FIOP — Factory-Installed Option
HP	— Horsepower
IFM — Indoor Fan Motor
VAV — Variable Air Volume
VFD — Variable Frequency Drive

*Outdoor-air hoods and filters included in base unit weights; indoorfan motors are NOT included.

VAV MOTOR WEIGHTS (Lb)

	MOTOR	UNIT	STANDARD	HIGH
			EFFICIENCY	EFFICIENCY
	HP	VOLTAGE
			IFM	IFM
	5	230/460	125	141
		575	163	177
	7.5	230/460	183	211
		575	193	222
	10	230/460	204	250
		575	204	242
	15	230/460	238	305
		575	240	310
	20	230/460	348	386
		575	304	350
	25	230/460	377	446
		575	375	454
	30	230/460	480	552
		575	418	494
	40	230/460	637	680
		575	587	625

NOTES:

1.Base unit weight includes outdoor-air hoods. Base unit weight does NOT include indoor-fan motor. ADD indoor-fan motor, FIOPs, and accessories for TOTAL operating weight.

2.The VAV motor weights include indoor fan motor and the VFD (variable frequency drive), compressor electric unloaders, VFD transducers, and associated wiring.

26

Table 3 — Evaporator Fan Motor Data

	UNIT	UNIT			FAN		MOTOR			FAN
				MOTOR			SHEAVE	BUSHING		SHEAVE	BUSHING		BELT
	SIZE	SIZE	MOTOR		SHAFT	MOTOR			FAN			BELT
				SHAFT DIA.			PITCH	DIAMETER		PITCH	DIAMETER		TENSION
	48AJ,AK,	48EJ,EK,	HP	(in.)	SPEED	SHEAVE	DIAMETER	(in.)	SHEAVE	DIAMETER	(in.)	(Quantity)	(lb at .25 in.)
	AW,AY	EW,EY			(rpm)		(in.)			(in.)
	020	024	5	1.125	717	BK55	4.9	NONE — 1.125	1B5V124	12.4	B—1.9375	BX56	8
			10	1.375	924	2BK50	4.4	NONE — 1.375	2B5V86	8.6	B—1.9375	(2) BX50	8
			15	1.625	1096	2B5V56	5.7	B — 1.625	2B5V90	9.1	B—1.9375	(2) 5VX530	9
	025	028	7.5	1.375	773	BK60H	5.4	H — 1.375	1B5V124	12.4	B—1.9375	BX56	10
			10	1.375	962	1B5V60	6.1	H — 1.375	1B5V110	11.1	B—1.9375	5VX570	11
			15	1.625	1106	2B5V54	5.5	B — 1.625	2B5V86	8.7	B—1.9375	(2) 5VX530	9
	027	030	10	1.375	848	2BK50	4.4	NONE — 1.375	2B5V94	9.4	B—1.9375	(2) BX50	8
			15	1.625	1059	2B5V48	4.9	B — 1.625	2B5V80	8.1	B—1.9375	(2) 5VX500	10
			20	1.625	1187	2B5V58	5.9	B — 1.625	2B5V86	8.7	B—1.9375	(2) 5VX530	11
	030	034	10	1.375	884	2BK50	4.4	H — 1.375	2B5V90	9.0	B—1.9375	(2) BX50	8
			15	1.625	1096	2B5V56	5.7	B — 1.625	2B5V90	9.1	B—1.9375	(2) 5VX530	9
			20	1.625	1187	2B5V58	5.9	B — 1.625	2B5V86	8.7	B—1.9375	(2) 5VX530	11
	035	038	10	1.375	779	1B5V60	6.1	NONE — 1.375	1B5V136	13.7	B—1.9375	5VX610	12
			15	1.625	976	2B5V52	5.3	B — 1.625	2B5V94	9.5	B—1.9375	(2) 5VX530	10
			20	1.625	1050	2B5V56	5.7	B — 1.625	2B5V94	9.5	B—1.9375	(2) 5VX550	11
	040	044	15	1.625	976	2B5V52	5.3	B — 1.625	2B5V94	9.5	B—1.9375	(2) 5VX530	10
			20	1.625	1050	2B5V56	5.7	B — 1.625	2B5V94	9.5	B—1.9375	(2) 5VX550	11
			25	1.875	1182	2B5V74	7.5	B — 1.875	2B5V110	11.1	B—1.9375	(2) 5VX590	11
	050	048	20	1.625	993	2B5V62	6.3	B — 1.625	2B5V110	11.1	B—1.9375	(2) 5VX570	11
			25	1.875	1134	2B5V80	8.1	B — 1.875	2B5V124	12.5	B—1.9375	(2) 5VX630	11
			30	1.875	1182	2B5V74	7.5	B — 1.875	2B5V110	11.1	B—1.9375	(2) 5VX590	13
	—	054	15	1.625	741	2B5V46	4.7	B — 1.625	2B5V110	11.1	B—1.9375	(2) 5VX550	11
			20	1.625	962	2B5V60	6.1	B — 1.625	2B5V110	11.1	B—1.9375	(2) 5VX570	12
			25	1.875	1134	2B5V80	8.1	B — 1.875	2B5V124	12.5	B—1.9375	(2) 5VX630	12
	—	058	20	1.625	930	2B5V58	5.9	B — 1.625	2B5V110	11.1	B—1.9375	(2) 5VX570	13
			25	1.875	1056	2B5V66	6.7	B — 1.875	2B5V110	11.1	B—1.9375	(2) 5VX590	14
			30	1.875	1182	2B5V74	7.5	B — 1.875	2B5V110	11.1	B—1.9375	(2) 5VX590	14
	060	064	25	1.875	1019	3B5V52	5.3	B — 1.875	3B5V90	9.1	B—1.9375	(3) 5VX530	12
			30	1.875	1134	2B5V80	8.1	B — 1.875	2B5V124	12.5	B—1.9375	(2) 5VX630	14
			40	2.125	1214	2B5V94	9.4	B — 2.125	2B5V136	13.6	B—1.9375	(2) 5VX650	15
	—	068	25	1.875	938	2B5V66	6.7	B — 1.875	2B5V124	12.5	B—1.9375	(2) 5VX610	14
			30	1.875	1087	3B5V58	5.9	B — 1.875	3B5V94	9.5	B—1.9375	(3) 5VX550	13
			40	2.125	1214	2B5V94	9.4	B — 2.125	2B5V136	13.6	B—1.9375	(2) 5VX650	15

NOTES:

1.	Motor shaft speed is 1750 rpm. The fan shaft diameter is 115/16 inches.
2.	All indoor fan motors meet the minimum efficiency requirements
	as established by the Energy Policy Act of 1992 (EPACT), effective
	October 24, 1997.

Fig. 18 — Air Distribution — Thru-the-Bottom

Fig. 19 — Air Distribution — Thru-the-Side

27

Step 5 — Install Flue Hood

48AJ,AK,AW,AY020-050 AND 48EJ,EK,EW,EY024-048 UNITS — Flue hood is shipped inside gas section of unit. To install, secure flue hood to access panel. See Fig. 20A.

48AJ,AK,AW,AY060 AND 48EJ,EK,EW,EY054-068 UNITS — Flue hood and wind baffle are shipped inside gas section of unit. To install, secure flue hood to access panel. Install the two pieces of the wind baffle over the flue hood. See Fig. 20B.

NOTE: When properly installed, flue hood will line up with combustion fan housing. See Fig. 21.

Fig. 21 — Combustion Fan Housing Location

Step 6 — Trap Condensate Drain — See Fig. 5-16 for drain location. Condensate drain is open to atmosphere and must be trapped. Install a trapped drain at the drain location. One 1-in. FPT coupling is provided inside the unit evaporator section for condensate drain connection. A trap at least 4-in. deep must be used. See Fig. 22. Trap must be installed to prevent freeze-up.

Condensate pans are sloped so that water will completely drain from the condensate pan to comply with indoor air quality guidelines. The condensate drain pans are not insulated.

Fig. 20A — Flue Hood Location (48AJ,AK,AW,AY020-050 and 48EJ,EK,EW,EY024-048 Units)

GAS SECTION

ACCESS PANEL

FLUE HOOD

WIND

BAFFLE

TOP VIEW

SIDE VIEW

Fig. 20B — Flue Hood Location (48AJ,AK,AW,AY060 and 48EJ,EK,EW,EY054-068 Units)

Fig. 22 — Condensate Drain Trap Piping Details (Typical Roof Curb or Slab Mount Shown)

Step 7 — Install Gas Piping — Unit is equipped for use with natural gas. Installation must conform with local building codes or, in the absence of local codes, with the National Fuel Gas Code, ANSI Z223.1.

Install manual gas shutoff valve with a 1/8-in. NPT pressure tap for test gage connection at unit. Field gas piping must include sediment trap and union. See Fig. 23. An 1/8-in. NPT is also located on the gas manifold adjacent to the gas valve.

Do not pressure test gas supply while connected to unit. Always disconnect union before servicing.

28

IMPORTANT: Natural gas pressure at unit gas connection must not be less than 5 in. wg or greater than 13.5 in. wg.

Size gas-supply piping for 0.5-in. wg maximum pressure drop. Do not use supply pipe smaller than unit gas connection.

Fig. 23 — Field Gas Piping

OPTIONAL STAGED GAS UNITS — The staging pattern is selected based on Heat Stage Type (HTSTGTYP). Max Capacity per changes default value is selected based on Capacity Maximum Stage (CAPMXSTG). See Table 4.

For complete information and service instructions for Staged Gas Control Units, see Control Operation and Troubleshooting literature.

Step 8 — Controls Options — The control options that the units can provide are based on the following parameters: CV (constant volume) or VAV (variable air volume) operation; stand-alone unit with field-supplied sensors installed (CV or VAV); as a system via Carrier Comfort System (TEMP or VVT® [Variable Volume and Temperature]); optional electronic expansion board installed (CV or VAV); linked to the Carrier Comfort Network; availability of a computer and software (ComfortWORKS® Building Supervisor, and Service Tool) or remote enhanced display accessory installed to access the base control board; and optional factory-installed staged gas control. See Table 5.

NOTE: Access to the base control board allows unit occupancy schedules, unit timeclock, and various set points to be changed from their factory-defined default settings.

Table 4 — 48A,E Series Staged Gas Implementation

NUMBER OF STAGES		MODEL NUMBER POSITION			POSITION		HEAT SIZE
	3		5	6,7,8	HTSTGTYP	CAPMXSTG
				024
				028
				030
	E		S	034	Default=1	Default=20	Low
				038
				044
				048
				020
				025
5 stages				027
	A		S	030	Default=1	Default=20	Low
				035
				040
				050
				038
	E		T	044	Default=1	Default=20	High
				048
				035
	A		T	040	Default=1	Default=20	High
				050
				024
	E		T	028	Default=2	Default=15	High
				030
7 stages				034
				020
	A		T	025	Default=2	Default=15	High
				027
				030
				054
	E		T	058	Default=3	Default=15	High
9 stages				064
				068
	A		T	060	Default=3	Default=15	High
				054
	E		S	058	Default=4	Default=15	Low
11 stages				064
				068
	A		S	060	Default=4	Default=15	Low

29

Table 5 — Controls Options and Configurations (Non-Thermostat Applications)

		UNIT CONFIGURATION	DEFAULT COOLING	DEFAULT HEATING
	CV or VAV Unit with SPT Sensor		Unoccupied Cooling — 90 F (32 C) (SPT)	Unoccupied Heating — 55 F (13 C) (SPT)
			Occupied Cooling — NA	Occupied Heating — NA
	CV Unit with SPT Sensor and Remote		Unoccupied Cooling — 90 F (32 C) (SPT)	Unoccupied Heating — 55 F (13 C) (SPT)
	Start/Stop Switch		Occupied Cooling — 78 F (26 C) (SPT)	Occupied Heating — 68 F (20 C) (SPT)
	VAV Unit Remote Start/Stop Switch Only		Unoccupied Cooling — 90 F (32 C)(SPT)	Unoccupied Heating — 55 F (13 C) (RAT)
			Occupied Cooling — 55 F (13 C) SPT)	Occupied Heating — 68 F (20 C) (RAT)*
	VAV Unit with SPT Sensor and Remote		Unoccupied Cooling — 90 F (32 C) (SPT)	Unoccupied Heating — 55 F (13C) (SPT)
	Start/Stop Switch		Occupied Cooling — 55 F (13 C) (SAT)	Occupied Heating — 68 F (20 C) (RAT)*
		LEGEND
	CV	— Constant Volume
	NA	— Not Available
	RAT — Return-Air Temperature
	SAT — Supply-Air Temperature
	SPT	Space Temperature
	VAV	— Variable Air Volume

*With DIP Switch No. 5 configured to OPEN (Occupied Heat Enabled).

NOTE: Space temperature sensor and remote start/stop switch are field-supplied.

STAGED GAS UNIT APPLICATIONS — The rooftop units may be ordered with an optional factory-installed staged gas control system that monitors heating operation of the rooftop unit.

IMPORTANT: An accessory field-supplied Navigator display module is required for all staged gas control units.

Install Supply-Air Thermistors (Staged Gas Units Only) — Supply-air thermistors are a field-installed factory-provided component. Three supply-air thermistors are shipped with staged gas units and are inside the heating section. Thermistor wires must be connected to SGC (staged gas controller) in the heating section. See Table 6 and Fig 24. The supply-air thermistors should be located in the supply duct with the following criteria:

•downstream of the heat exchanger cells

•equally spaced as far as possible from the heat exchanger cells

•a duct location where none of the supply air thermistors are within sight of the heat exchanger cells

•a duct location with good mixed supply air portion of the unit.

THERMISTORS — All units are equipped with a supply air thermistor (SAT) located in the supply fan discharge and an outdoor air thermistor (OAT) located in the outdoor air hood. Variable air volume (VAV) units are supplied with a return air thermistor (RAT) located on the return air damper support.

CONSTANT VOLUME APPLICATIONS — The units, as shipped, are operable as stand-alone units, using either a standard (mechanical or electronic) 2-stage heat, 2-stage cool thermostat, or with an electronic room sensor and a timeclock to establish unit start and stop times.

With a standard thermostat (programmable is optional), heating and cooling operation is set by space temperature.

With a space sensor and timeclock, the machine will operate at default values unless they are changed using appropriate input devices. The space sensor senses space temperature and may be equipped with a timed override feature, which allows unit operation during unoccupied periods.

The space sensors may be used in multiples of 4 or 9 to achieve space temperature averaging. The use of a space sensor also allows the unit to be turned on and off from a remote signal.

			Table 6 — Thermistor Designations
		PIN	FUNCTION AND LOCATION
	THERMISTOR	CONNECTION		PART NO.
			Thermistors
		POINT
	SAT 1	J8 – 1,2 (SGC)	Supply Air Thermistor (SAT) — Inserted into supply section
			underneath the gas heat section (factory-provided, field-installed)
	SAT 2	J8 – 3,4 (SGC)	Supply Air Thermistor (SAT) — Inserted into supply section	HH79NZ016
			underneath the gas heat section (factory-provided, field-installed)
	SAT 3	J8 – 5,6 (SGC)	Supply Air Thermistor (SAT) — Inserted into supply section
			underneath the gas heat section (factory-provided, field-installed)

30