Typical Applications - York AHP18 Technical Manual

255029-YTG-M-0610
THERMOSTAT
R
G
Y
W2
E
W / W1
O
X / L
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

UPFLOW
Johnson Controls Unitary Products
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
BOARD
R
G
Y / Y2
Y1
W2
W1
O
HUM
X / L
COM
DOWNFLOW
HUMIDISTAT *
HORIZONTAL RIGHT
HORIZONTAL LEFT
HEAT PUMP
R
Y
W1 66
W
O
X / L
C
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