York AHP18 Typical Applications, CONTROL WIRING - AHP or MA Series Air Handler, Heat Pump, Board

255029-YTG-M-0610

		CONTROL WIRING - AHP or MA Series Air Handler
		And Newer UPG Single Stage HP Systems
		Single Stage H/P with Standard Demand Defrost Control Board
		AIR HANDLER			HEAT PUMP
THERMOSTAT			BOARD
	R		R			R
	G		G
	Y		Y / Y2			Y
			Y1
	W2		W2
	E		W1			W1 66
	W / W1					W
	O		O			O
			HUM	HUMIDISTAT *
	X / L		X / L			X / L
	C		COM			C

SINGLE-STAGE COOLING WIRING

*Optional dehumidification humidistat switch contacts open on rise. Notes:

1. “Y” Terminal on Air Handler Control Board must be connected for full CFM and applications requiring 60 second blower off delay for SEER enhancement.

2. Move HUM STAT Jumper on AH Control Board to YES/NO position.

3. MODE Jumper on AH control board should be set to HP for heat pumps.

4. To change quantity of heat during HP defrost cycle - Reverse connections at W1 & W2 on Air Handler Control Board.

TYPICAL APPLICATIONS

HORIZONTAL RIGHT

UPFLOW

DOWNFLOW

HORIZONTAL LEFT

Johnson Controls Unitary Products 11