Carrier 50EK, 50EJ, 50EW, 50EY Ð Make Unit Duct Connections, Ð Evaporator Fan Motor Data

Table 2 Ð Evaporator Fan Motor Data

		MOTOR	FAN		MOTOR			FAN				BELT
					SHEAVE	BUSHING		SHEAVE	BUSHING		OUTSIDE
UNIT	MOTOR	SHAFT	SHAFT	MOTOR			FAN					TENSION
					PITCH	DIAMETER		PITCH	DIAMETER	BELT	BELT
SIZE	HP	DIAMETER	SPEED	SHEAVE			SHEAVE					(Lb @
					DIAMETER	(in.)		DIAMETER	(in.)		LENGTH
		(in.)	(rpm)									.24 in.)
					(in.)			(in.)
024	5	1.12	725	BK52	4.6	None-1.125	1B5V110	11.1	B-1.6875	BX59	62	5.02
	10	1.38	924	BK72	6.6	None-1.375	1B5V124	12.5	B-1.6875	BX60	63	7.05
	15	1.62	1088	1B5V68	6.9	B-1.625	1B5V110	11.1	B-1.6875	5VX590	59	9.38
028	7.5	1.38	773	BK55H	4.9	H-1.375	1B5V110	11.1	B-1.6875	BX56	59	6.87
	10	1.38	962	BK67H	6.1	H-1.375	1B5V110	11.1	B-1.6875	BX56	59	7.26
	15	1.62	1119	1B5V70	7.1	B-1.625	1B5V110	11.1	B-1.6875	5VX590	59	9.17
030	10	1.38	843	BK72	6.6	None-1.375	1B5V136	13.7	B-1.6875	BX62	65	6.96
	15	1.62	1056	1B5V66	6.7	B-1.625	1B5V110	11.1	B-1.6875	5VX590	59	9.60
	20	1.62	1182	1B5V74	7.5	B-1.625	1B5V110	11.1	B-1.6875	5VX600	60	11.67
034	10	1.38	896	BK70H	6.4	H-1.375	1B5V124	12.5	B-1.6875	BX60	63	7.20
	15	1.62	1088	1B5V68	6.9	B-1.625	1B5V110	11.1	B-1.6875	5VX590	59	9.38
	20	1.62	1182	1B5V74	7.5	B-1.625	1B5V110	11.1	B-1.6875	5VX600	60	11.17
038	10	1.38	788	2BK47	4.1	None-1.375	2B5V90	9.1	B-1.6875	BX51	54	5.49
	15	1.62	966	1B5V68	6.9	B-1.625	1B5V124	12.5	B-1.6875	5VX630	63	9.22
	20	1.62	1050	1B5V74	7.5	B-1.625	1B5V124	12.5	B-1.6875	5VX650	65	10.02
044	15	1.62	966	1B5V68	6.9	B-1.625	1B5V124	12.5	B-1.6875	5VX630	63	9.54
	20	1.62	1035	1B5V80	8.1	B-1.625	1B5V136	13.7	B-1.6875	5VX670	67	10.37
	25	1.88	1162	1B5V90	9.1	B-1.875	1B5V136	13.7	B-1.6875	5VX680	68	10.88
048	20	1.62	1019	2B5V52	5.3	B-1.625	2B5V90	9.1	B-1.6875	5VX550	55	7.93
	25	1.88	1135	2B5V58	5.9	B-1.875	2B5V90	9.1	B-1.6875	5VX560	56	8.66
	30	1.88	1182	2B5V76	7.5	B-1.875	2B5V110	11.1	B-1.6875	5VX610	59	9.07

NOTE: Motor shaft speed is 1750 rpm. The fan shaft diameter is 111¤16 inches.

ROOF MOUNT Ð Check building codes for weight distri- bution requirements.

Step 3 Ð Field Fabricate Ductwork Ð Secure all ducts to building structure. Use ¯exible duct connectors be- tween unit and ducts as required. 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.

To attach ductwork to roof curb, insert ductwork approxi- mately 10 to 11 in. up into the curb. Connect ductwork to 14-gage roof curb material using sheet metal screw driven from inside the duct.

The units with electric heat require a 1-in. clearance for the ®rst 24 in. of ductwork.

NOTE: A 90-degree elbow must be provided in the duct- work to comply with UL (Underwriters' Laboratories) codes for use with electric heat.

Outlet grilles must not lie directly below unit discharge.

Step 4 Ð Make Unit Duct Connections

50EJ,EK UNITS Ð Unit is shipped for through-the-bottom duct connections. Ductwork openings are shown in Fig. 3 and 4. Attach all ductwork to roof curb. Air distribution is shown in Fig. 8. Refer to installation instructions shipped with accessory roof curb for more information.

50EW,EY UNITS Ð Remove shipping covers from supply and return air openings. Attach ®eld-supplied ductwork to unit. Use a single duct over both return openings and a single duct over both supply openings. See Fig. 5 and 6 for duct opening dimensions. Secure all ducts to the building struc- ture. See Fig. 9. Use ¯exible duct connectors between unit and ducts as required.

Install accessory barometric relief or power exhaust in the ®eld-fabricated return ductwork. Refer to Position Power Exhaust/Barometric Relief Damper Hood Section on page 29 for more information.

Step 5 Ð Trap Condensate Drain Ð See Fig. 3-6 and 10 for drain location. Condensate drain is open to the atmosphere and must be trapped. Install a trapped drain at

Fig. 8 Ð Air Distribution Ð Thru-the-Bottom

Fig. 9 Ð Air Distribution Ð Thru-the-Side

the drain location. One 1-in. FPT coupling is provided in- side unit evaporator section for condensate drain connec- tion. A trap at least 4-in. deep must be used. 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 qual- ity guidelines.

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