York K3EU180A50 Maintenance, Blower Motor and Drive Data, Power and Control Wiring

TABLE 7 - BLOWER MOTOR AND DRIVE DATA
Motor	Blower	Adjustable Motor Pulley		Fixed Blower Pulley			Belt
	Range	Pitch Dia	Bore	Pitch Dia.	Bore			Pitch Lg.
(HP/kW)						Designation
	(RPM)	(In./mm)	(In./mm)	(In./mm)	(In./mm)			(In./mm)
3 / 2.2	615/800	3.4 - 4.4 / 86	78/ 22.2	8.0 / 203	1 / 25	A54		55.3 / 1405
		- 112

MOTOR SPECIFICATIONS

•1450 RPM

•380/415-3-50

•Solid base

•56 Frame

•Inherently protected

•Permanently lubricated ball bearings

POWER AND CONTROL WIRING

Install electrical wiring in accordance with appli- cable national, local and municipal codes. The unit should be grounded in accordance with these codes.

Route the power wires into the unit through one of the 78" (22.2mm) dia.knockouts in the panel with the supply air opening and connect them to the terminals on blower motor contactor 10M. Route the control wires into the unit through the other 78" (22.2mm) dia.knockout and connect them to the terminals on block 4TB. Refer to the unit drawing in Figure 7 for the locations of these knockouts.

If the unit includes an electric heat accessory, route the power wires into heater control box in- stead of the unit. Refer to the electric heat in- structions for additional installation information.

Refer to Table 4 to size the disconnect switch, the power wiring and the fuses. Refer to Figure 8 for typical field wiring.

NOTE: Three phase motor rotation may be incor- rect when the unit is first started up. Re- verse phase (leads L1 and L2) at contactor to obtain the correct rotation.

TERMINALS ON	TERMINALS ON BLOCK 3TB OF
	THE BLOWER UNIT

1-STAGE COOLING THERMOSTAT 2TH0870124

FIG 8 - TYPICAL FIELD WIRING (Cooling only)

MAINTENANCE

FILTERS — The filters must be replaced as often as necessary		LUBRICATION — The bearings for the blower shaft and the
to assure good air flow and filtering action.		blower motors are permanently lubricated and should not re-
		quire additional lubricant.
EVAPORATOR COIL — Do not allow dirt to accumulate on the		DRAIN PAN — The drain pan should be inspected regularly
evaporator coil or other parts of the evaporator air circuit. Clean
		to assure proper drainage.
as often as necessary to assure good system performance.
Use a brush, vacuum cleaner attachment or other suitable		BELTS — Maintain belt tension to extend belt life. Replace
means.		when signs of failure begin to appear.	Norman
		035-12124-000 Rev. A (0501)
UnitarySubject to change without notice. Printed in U.S.A		Supersedes: 550.39-N5YI (894)
Copyright  by York International Corporation
	5005
Products	York		OK
	Drive		73069
Group