Blower Motor and Drive Data, Control Wiring

TABLE 7 - BLOWER MOTOR AND DRIVE DATA

	Motor	Blower	Adjustable Motor Pulley				Fixed Blower Pulley		Belt
Model	Motor	Range	Pitch Dia			Bore	Pich Dia.	Bore	Designa-	Pitch Lg.
Model	(HP/kW)*	Range	Pitch Dia			Bore	Pich Dia.	Bore	Designa-	Pitch Lg.
	(HP/kW)*	(RPM)	(In./mm)	(In./mm)			(In./mm)	(In./mm)	tion	(In./mm)
		(RPM)	(In./mm)	(In./mm)			(In./mm)	(In./mm)	tion	(In./mm)
KEU090	112 / 1.1	650/850	3.4 - 4.4 /	7	8	/ 22.2	7.5 / 190	1 / 25	A37	38.3 /	973
			86 - 112
KEU120	2 / 1.5	700/910	3.4 - 4.4 /	7	8	/ 22.2	7.0 / 178	1 / 25	A37	38.3 /	973
			86 - 112

*All motors are 1450 RPM and have a 56 frame, inherent protection and permanently lubricated ball bearings The motors have a solid base and a 1.15 serv- ice factor. All 3-phase motors are wired for 380/415V power supply.

550.39-N4YI

MOTOR SPECIFICA-

TIONS

•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 applicable national, local and municipal codes. The unit should be grounded in ac- cordance with these codes.

Remove the 13 8" (35mm) knockout from the unit rear panel. Route the power wiring conduit through this opening. Connect the conduit to the required field-supplied fitting and the power wiring to blower motor contactor 10M in unit control box.

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

CONTROL WIRING

Route the low voltage control wiring through the 7 8" (22.2mm) hole (with bushing) in the units rear panel. Add 12" (25mm) con- duit fitting to the 7 8" (22.2mm) hole in the unit control box, route control wiring through this opening and connect them to the ter- minals on block 4TB.

Refer to Table 6 to size the disconnect switch, the power wiring and the fuses. Refer to Figure 10 for typical field wiring.

NOTE: Three phase motor rotation may be incorrect when the unit is first started up. Reverse phase (leads L1 and L2) at contactor to obtain the correct rotation.

4 - WIRE

LUG ON NEUTRAL TERMI-

NAL BLOCK

TERMINALS ON		TERMINALS ON BLOCK 3TB OF
1 - S TA G E C O O L I N G		THE BLOWER UNIT
THERMOSTAT
THERMOSTAT
2TH0870124

FIG. 10 - TYPICAL FIELD WIRING (Cooling only)

Unitary Products Group

K4EU120A50A, K5EU090A50A specifications

The York K4EU120A50A and K5EU090A50A are high-performance commercial air conditioning units designed for efficiency and reliability. These models integrate advanced technology to meet the demanding cooling needs of various commercial spaces.

One of the primary features of the K4EU120A50A is its high capacity cooling ability, rated at 120,000 BTU, making it ideal for medium to large commercial environments such as office buildings, retail stores, and warehouses. The K5EU090A50A offers a slightly lower capacity of 90,000 BTU, suitable for smaller commercial areas or specific zoned applications within larger buildings. Both units are equipped with energy-efficient compressors that ensure optimal performance while reducing overall energy consumption.

The K4EU and K5EU series utilize variable speed technology, which allows the units to adjust their cooling output based on the space's specific requirements. This feature not only enhances comfort by maintaining consistent temperatures but also contributes to lower operating costs. The inverter-driven compressor technology further enhances energy efficiency by continuously adjusting the cooling output to match the varying demands of the environment.

Both models include advanced air filtration systems designed to improve indoor air quality. The filters capture dust, pollen, and other airborne particles, promoting a healthier atmosphere for occupants. Additionally, the units feature a robust and corrosion-resistant cabinet design, ensuring durability even in harsh conditions.

Installation flexibility is another strong point of the K4EU and K5EU series. These units can be installed in various configurations, including rooftop, ground level, or wall-mounted setups, accommodating different building designs and layouts. The user-friendly control system allows for easy adjustments and monitoring, providing real-time data on performance and energy usage.

The York K4EU120A50A and K5EU090A50A models are also designed with quiet operation in mind. The sound-attenuating components reduce noise levels, making them suitable for environments where noise can be a concern.

In summary, the York K4EU120A50A and K5EU090A50A are distinguished by their high cooling capacities, energy efficiency, advanced technology, and enhanced indoor air quality features. They provide reliable cooling solutions tailored to the needs of commercial users, ensuring comfort and sustainability in a variety of settings.