York AHP18 - Manual (Page 11)

255029-YTG-M-0610
Johnson Controls Unitary Products 11
* 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
SINGLE-STAGE COOLING WIRING
THERMOSTAT
AIR HANDLER
BOARD
HEAT PUMP
R R R
G G
Y
W / W1
O
W
O O
C
X / L X / L
C
Y / Y2
Y1
Y
W1 66
W2
W1
HUM
COM
HUMIDISTAT *
W2
E
X / L
And Newer UPG Single Stage HP Systems
Single Stage H/P with Standard Demand Defrost Control Board
CONTROL WIRING - AHP or MA Series Air Handler
UPFLOW DOWNFLOW
HORIZONTAL RIGHT
HORIZONTAL LEFT