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Wiring
Heat Pump HVAC System Wiring
•
Check your system information to be sure and note the color of original thermostat wire and the terminal it was
connected to. No matter what the old stat connection was (O or B), connect the wire to the thermostats W2/O
terminal. The setting of the C/O Type will set the correct system operation. For change over with cool systems
(Orange wire, O terminal): set C/O type to w/cool (most common and default setting). For change over with heat
systems (Brown wire, B terminal): set C/O type to w/heat.
•
2nd Stage Heat
- Enable second stage heating outputs. If you have a single stage heating system, leave this set to
N
. If you have a 2 stage heating system, set to
Y
to enable.
•
Aux Heat (HP)
- If you have auxiliary heat strips, set this to
Y
to enable.
•
2nd Stage Cool
- Enable second stage cooling outputs. If you have a single stage cooling system, leave this set to
N
. If you have a two stage cooling system, set to
Y
to enable.
Thermostat Back
Heat Pump HVAC System
Thermostat Connection
G Fan
W1 Aux Heat
Y1 Compressor Stage 1
R 24VAC Return
C 24VAC Common
Y2 Compressor Stage 2
O Change Over Valve
For Heat Pump systems, connect the 24R connection
to either the 24RC or 24RH
Y1
G
Y2
RS2
RS2
RSC
HC
24RC
W1
24RH
W2/O
RS1
RS1
RSC
H1
24C
Cooling 24V
Fan
Cooling stage 1
Cooling stage 2
Remote Sensor 2
Remote Sensor 2
Sensor shield
Humidity Relay Com
24VAC Com
24V Heating
Aux Heating
Change Over Valve
Remote Sensor 1
Remote Sensor 1
Sensor shield
Humidity Relay
Remote Outside Sensor
Remote Indoor Sensor
Shielded cable
Shielded cable
Humidifier/Dehumidifier
Contact
Closure
Input
Note!
If you get heating when you
expected cooling, change the C/O
type to the opposite setting.
Setup
To set the HVAC system type, go to the
Thermostat Info screen and press
Setup
button.
•
Type
- Set the HVAC System Type: set to
Heat Pump
•
Fan Type
- Automatically set for heat
pump systems. Ignore this setting.
•
C/O type
- Change Over (reversing) Valve
Type. Heat pumps change from heating to
cooling by reversing operation.You must
configure the thermostat’s changeover
valve setting to work correctly with your
HVAC system.
