York E1FB180, E1FB240 Clearances, Compressor Crankcase Heater, Power and Control Wiring

035-16192-001-A-1001

CAUTION: LENGTH OF FORKS MUST BE A MINIMUM OF 54" (when lifting from the compressor end of the unit) and a MINIMUM OF 42" (when lifting from the front or rear of the unit).

Remove the nesting brackets from the four corners on top of the unit. All screws that are removed to take these brackets off must be replaced on the unit.

CLEARANCES

All units require certain minimum clearances for proper opera- tion and service. Refer to Figure 4 for these clearances.

WARNING: Do not permit overhanging structures or shrubs to obstruct air discharge.

Additional height may be required for snow clearance if winter operation is expected.

COMPRESSOR CRANKCASE HEATER

The compressor is equipped with a crankcase heater to pre- vent refrigerant from mixing with crankcase oil during the “OFF” cycle. The heaters will be energized when the com- pressor is not running providing the unit disconnect switch is closed.

TABLE 2 - PHYSICAL DATA

	DESCRIPTION		UNIT MODEL
			EFB180	EFB240
Compressor1		Rating - (Qty) Tons	(2) 7-1/2	(2) 10
		Quantity	2	2
Fans		Diameter - inches	24	26
		Blades/Pitch (°)	3/32	3/36
		Nominal CFM	10862	11395
Fan Motors2		HP	1	1
		RPM	1100	1100
		Rows Deep X Rows High	2 X 40	2 X 40
		Finned Length - inches	130	130
		Face Area - square feet	36.11	36.11
		Tube(Copper) OD - inches	3/8	3/8
		Fins (Aluminum) per inch	18	20
		Holding Charge	1-0/1-0	1-0/1-0
		(Sys 1 / Sys 2)3
		Operating Charge	16-8/17-8	19-0/19-0
		(Sys 1 / Sys 2)4
		Shipping	970	1020
		Operating	980	1040

1These compressors are fully hermetic.

2The ball bearing, 48 frame, single phase condenser fan motor have internal protection and are directly connected to the condenser fins. Motor rotation is counterclockwise when viewing the lead end, which is opposite the shaft end.

3The amount of charge in the unit as shipped from the factory.

4Total operating charge for the condensing unit, matching indoor unit, and 25 feet of interconnecting pipe.

CAUTION: Do not attempt to start the compressor without at least eight hours of crankcase heat or compressor damage will occur.

5 ft.

MIN

	O
O	O
	O
O	O
O
O
	O
O

FIG. 2 - TYPICAL RIGGING

If a unit has just been installed or the unit disconnect switch has been open for a long period of time, move the system switch on the room thermostat to the “OFF” position before closing the unit disconnect switch. Eight hours of crankcase heat are re- quired to drive the liquid refrigerant out of the compressor bef- ore the compressor can be started.

POWER AND CONTROL WIRING

Install electrical wiring in accordance with the latest National Electrical Code (NFPA Standard No. 70) and/or local regula- tions. The unit should be grounded in accordance with these codes.

POWER WIRING

Check the voltage of the power supply against the data on the unit nameplate. Check the size of the power wire, the disconnect switch and the fuses against the data in Table 3.

NOTE: Copper conductors must be installed between the dis- connect switch and the unit.

Refer to Figure 4 for the location of the power wire access opening through the front of the unit. This opening will re- quire a field-supplied conduit fitting.

The field-supplied disconnect switch must be suitable for an outdoor location. Although it should be installed near the unit, do NOT secure it to the unit cabinet.

Refer to Figure 3 for typical field wiring.

CONTROL WIRING

Refer to Figure 4 for the location of the control wire access opening through the front of the unit.

Route the necessary low voltage control wires from terminal block TB2 of the unit control box through this access open- ing to the indoor unit and to the room thermostat. Refer to Figure 3 for typical field wiring.

The room thermostat should be mounted about 5 feet above the floor and located where it will be exposed to normal room air circulation. Do not locate it on an outside wall, near a supply air grille, or where it may be affected by sunlight

4 Unitary Products Group