Johnson Controls Unitary Products
13
5151060-YTG-F-1116
TYPICAL THERMOSTAT CONNECTION
*
Optional dehumidification humidistat switch contacts open on humidity rise.
NOTES:
1. “Y/Y2” Thermostat wire must be connected for full CFM and applications requiring 60 second blower off delay for SEER enhancement.
2. Move HUM STAT jumper on air handler control board to YES position if humidistat is used.
3. For heat pump applications - set AC/HP jumper on air handler control board to the HP position.
.
*
Optional dehumidification humidistat switch contacts open on humidity rise.
NOTES
:
1. “Y/Y2” Thermostat wire must be connected for full CFM and applications requiring 60 second blower off delay for SEER enhancement.
2. Remove humidistat jumper on air handler control board.
3. For heat pump applications - set AC/HP jumper on air handler control board to the HP position.
Cooling Models with and without Electric Heat Wiring
Air Handler Control Wiring
Typical A/C - Cooling only Applications
THERMOSTAT
P3 ON AIR
HANDLER
BOARD
1 - STAGE
AIR CONDITIONING
R
R
G
Y
W1
W2
C
G
W1
W2
Y
C
Y / Y2
Y1
O
HUM
C
(COM)
HUMIDISTAT
*
A0407-001
THERMOSTAT
1 - STAGE
AIR CONDITIONING
R
R
G
Y
W1
W2
C
G
W1
W2
Y
C
Y / Y2
Y1
O
HUM
Air Handler Control Wiring
Typical A/C with Electric Heat Applications
HUMIDISTAT
*
P3 ON AIR
HANDLER
BOARD
C
(COM)
P2 ON AIR
HANDLER
BOARD
HUM
EAC
ELECTRIC AIR
CLEANER RELAY
1 - STAGE
AIR CONDITIONING
Air Handler Control Wiring
Typical A/C with Cooling and
Electric Heat Applications
24V HUMIDIFIER
HUMIDISTAT
Two-Stage Heat Pump Wiring
CONTROL WIRING - Air Handler & UPG HP Systems Two Stage H/P with York Guard VI Board &
Copeland “Ultra Tech” Conventional Application - Not Hot Heat Pump
THERMOSTAT
AIR HANDLER BOARD
2 - STAGE SCROLL HEAT PUMP
R
R
R
G
G
Y2
E
W
W
O
O
O
X / L
X / L
C
C
Y / Y2
Y1
Y1
Y2 OUT
Y2
W2 OUT
W1 OUT
BS
W2
W1
HUM
C (COM)
HUMIDISTAT*
Y1
A0408-001
Air Handler with Communicating AC or HP
A+
R
C
B-
A+
R
C
B-
A+
R
C
B-
R
G
Y/Y2
Y1
W2
W1
O
HUM
COM
TOUCH SCREEN
COMMUNICATING
CONTROL
AIR HANDLER
COMMUNICATING
CONTROL
AC/HEAT PUMP
COMMUNICATING
CONTROL
EAC
A0409-001
