6
1H/1C Heat Pump (no auxiliary heat)
Rc Power [1]
R [R+Rc joined by jumper]
O/B Changeover valve [4]
Y Compressor relay
G Fan relay
C 24VAC common
S1 Optional outdoor/remote sensor
2H/1C Heat Pump (with auxiliary heat)
L Equipment monitor [5]
Aux/E Auxiliary/Emergency heat relay (Heat 2)
Rc Power [1]
R [R+Rc joined by jumper]
O/B Changeover valve [4]
Y Compressor relay
G Fan relay
C 24VAC common
S1 Optional outdoor/remote sensor
2H/2C Heat Pump (no auxiliary heat)
Y2 Compressor 2 relay
Rc Power [1]
R [R+Rc joined by jumper]
O/B Changeover valve [4]
Y Compressor 1 relay
G Fan relay
C 24VAC common
S1 Optional outdoor/remote sensor
3H/2C Heat Pump (with auxiliary heat)
Y2 Compressor 2 relay
L Equipment monitor [5]
Aux/E Auxiliary/Emergency heat relay (Heat 2)
Rc Power [1]
R [R+Rc joined by jumper]
O/B Changeover valve [4]
Y Compressor 1 relay
G Fan relay
C 24VAC common
S1 Optional outdoor/remote sensor
Wiring guide—heat pump systems
Wiring
See [notes] below
[1] Power supply. Provide disconnect means and overload protection as required.
[4] O/B set to control as either O or B in installer setup.
[5] Heat pump reset (powered continuously when thermostat is set to Em. Heat; system monitor
when set to Heat, Cool, or Off).
NOTE: The product data sheets have more extensive wiring diagrams and is
available at customer.resideo.com.
DEHUMIDIFICATION WITH LOW SPEED FAN
Wire the thermostat IAQ relay to the low speed fan
for dehumidification control at the equipment. The
thermostat relay can be set to normally open or
normally closed in the thermostat installer setup.
1
C
K
R
C
R
U1
U1
120
VAC
24
VAC
C
R
THERMOSTAT
DEHUMIDIFICATION
WITH LOW SPEED FAN
FIELD INSTALL JUMPER
BETWEEN R AND U1
OR
C
K
R
C
R
U1
U1
120
VAC
24
VAC
C
R
SYSTEM
TRANSFORMER
120
VAC
24
VAC
HUM, DEHUM OR
VENT TRANSFORM-
ER
THERMOSTAT
POWERED
HUMIDIFIER,
DEHUMIDIFIER
OR VENTILATOR
POWERED HUMIDIFIER, DEHUMIDIFIER OR VENTILATOR
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