York AHP18 THRU 60 Cooling Models with Electric Heat Wiring, SINGLE-STAGE Cooling Wiring

255029-YTG-J-1007

COOLING MODELS WITH ELECTRIC HEAT WIRING

MA SERIES - Air Handler Control Wiring

MA SERIES - Air Handler Control Wiring

Typical A/C - Cooling only Applications

Typical A/C with Electric Heat Applications

THERMOSTAT

AIR HANDLER

1 - STAGE

THERMOSTAT

AIR HANDLER

1 - STAGE

BOARD

BOARD

R

R

AIR CONDITIONING

R

R

AIR CONDITIONING

G

G

G

G

Y

Y / Y2

Y

Y

Y / Y2

Y

W1

Y1

Y1

W2

W2

W2

W2

C

W1

HUMIDISTAT *

W1

W1

HUMIDISTAT *

O

C

O

HUM

HUM

X / L

X / L

COM

C

COM

C

COOLING MODELS WITH ELECTRIC HEAT WIRING

*Optional dehumidification humidistat switch contacts open on humidity 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 position if Humidistat is used.

3. MODE Jumper on AH control board should be set to A/C for air conditioners.

		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.

Unitary Products Group 11