DCN: 141-01652-07 4/30/09
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HVAC SYSTEM CONNECTION
Heat Pump HVAC System Wiring
Installation Notes
Heat Pump HVAC System Setup
System Type: Set the mechanical system type to Heat Pump in the Installer Settings Menu
Single Stage Compressor Systems use Y1 for stage 1 heating/cooling, and W1 for stage 2 Aux
Heating.
Two Stage Compressor Systems use Y1 for stage 1, Y2 for stage 2 heating/cooling, and W1 for stage
3 Aux Heating.
Change Over Valve: You must configure the thermostat’s changeover valve setting to work correctly with
your HVAC system. Check your system information to be sure.
•
Changeover settings are made in the Installer Settings – System Settings - Mechanical Settings
menu.
•
Changeover with cool is the default setting and typical for most systems.
•
If you get cooling when you expect heating, change the C/O type to the opposite setting.
HVAC system transformer: Heat Pump systems have one system transformer. Do not cut the RC/RH
jumper. Wire the HVAC systems 24VAC common (blue wire) to the 24Com terminal, and the 24VAC
return (red wire) to the 24RC or 24RH terminal.
RED
GREEN
WHITE
YELLOW
Z-WAVE Thermostat
W1 HEAT
JP1: internal RC/RH Jumper
Do not cut for HP systems
24RC
ORANGE
BROWN
24RH
G FAN
W2/O or B
Y1 COMP
Typical HVAC system
thermostat wiring color codes.
Be sure to verify your systems
wiring color codes.
Y2 COMP
24COM
Heat Pump HVAC System
G Fan
W 1 Aux Heat
Y1 Compressor Stage 1
R 24VAC RETURN
C 24VAC COMMON
THERMOSTAT CONNECTION
Y2 Compressor Stage 2
Change Over Valve O or B
BLUE
