DCN: 2012-11-222-1 Page 1
™
Installation Guide
Model CH-THSTAT-W
This thermostat is compatible with most HVAC systems, including the following:
•
24VAC systems
Note: requires both the 24R and 24C (common) wires
•
Standard gas/oil/electric heating systems
o
1 stage heating and cooling
o
2 stage heating and cooling
•
Heat Pump systems:
o
1 stage heating and cooling
o
2 stage heating and cooling
o
2
nd
or 3
rd
stage Auxiliary heating (heat strips)
•
Do NOT use for line voltage controls (120/240VAC)
Stop! Before removing your existing thermostat be sure to label the wires with the wiring
labels included. Label the wires as they were
connected to the old thermostat terminals
and record them below.
We strongly recommend you
take a picture of your existing thermostat wiring
connections. This will enable you to reconnect your old thermostat if you encounter a
problem installing the CH-THSTAT-W and will assist in trouble shooting the installation, if
needed.
CAUTION: The typical wire colors noted below may be different from your installation.
Standard HVAC System Wiring
Thermostat
Terminal Marking
Meaning
Typical Wire
Color
Record the
old thermostat
wire color
connected to this terminal here
C
24VAC Common
Blue
R (or RH)
24VAC Return (heating system)
Red
G
Fan
Green
W or W1
Heat stage 1
White
Y or Y1
Cool stage 1
Yellow
W2
Heat stage 2
Orange
Y2
Cool stage 2
Black
Heat Pump HVAC System Wiring
Thermostat
Terminal Marking
Meaning
Typical Wire
Color
Record the
old thermostat
wire color connected
to this
terminal here
C
24VAC Common
Blue
R
24VAC Return
Red
G
Fan
Green
W or W1
Aux Heat
White
Y or Y1
Compressor stage 1
Yellow
O (or B*)
Change Over Valve
Orange
(brown*)
Y2
Compressor stage 2
Black
* if you have a terminal marked “B” with a brown wire attached to it, that means you have a changeover (C/O) with heating
type heat pump system. Be sure to set the change over type in the
Installer Settings
menu to
C/O Type: w/Heat.
Otherwise leave it set to
w/Cool
.
