Comfort Stat CP1717, Owner'S Manual, Page: 6 / 8

Ÿ Insert the tabs on top of the thermostat body into the slots at the top of the wallplate. Press the bottom of the thermostat body into the snap on the bottom of the
wallplate. Refer to Figure 2. (NOTE: Do not force the thermostat onto the wallplate, as the terminal pins may be damaged. If it does not snap properly, the thermostat
may not work.)
Ÿ
Insert the two AA size alkaline batteries, observing the polarity marked inside the battery compartment.
Ÿ Switch on the main power at the panel or furnace.
Wiring Diagrams
X­No Connection
Selector Switches
In order for this thermostat to control your system, the system type must be specified by the selector switches on the printed circuit board inside the thermostat. There
is also a selector switch for your choice of Fahrenheit or Celsius temperature display. See figure 6.
Ÿ
Heating System Selector (HG – HE switch)
The factory position for this switch is in the “HG” position. Leave it in this position if you have a gas furnace or an oil burner. If you have an electric furnace, test to see
whether the Heat and Fan come on as expected after installation. If the Fan operation is normal, leave it in the “HG” position. If the Fan does not come on within a
minute of the thermostat calling for heating, change the switch position to “HE”. The system selector has no effect in the cooling mode.
NOTE: “HG” position is for gas and most other systems. “HE” position is for certain electric systems having a fan relay.
Ÿ
System Selector (STANDARD – HEAT PUMP switch)
R G W Y
Rh/B Rc/O
Wallplate
Terminals
Jumper
Fan
Relay Heat Relay
or Valve Cool
Contactor Heat/Cool
24V Supply
System
Selector STD
HP
Fan
Relay Reversing
Valve Compressor
Contactor
Wallplate
Terminals
R G W Y
Rh/B
Rc/O
System
Selector
HP
STD
Fan
Relay
R
Wallplate
Terminals
Heat 24V
Supply
Cool
Contactor Heat Relay
or Valve Cool 24V
Supply
No Jumper
W
G
Rh/B
Y
Rc/O
System
Selector
HP
STD
Jumper
24V
Supply
Heat
Mode Cool
Mode
OR
Heat 24V or
Millivolt Supply
Heat Relay
or Valve
Wallplate
Terminals
R
Jumper
G
W
Y
Rh/B Rc/O
System
Selector
HP
STD
Wallplate
Terminals
R
System
Selector
Heat 24V
Supply Heat Relay
or Valve
G
W Y
Rh/B Rc/O
Jumper
HP
STD
Fan
Relay
Fan
Relay
Wallplate
Terminals
R
Cool
Contactor Cool 24V
Supply
G W Y
Rh/B Rc/O
System
Selector
HP
STD Jumper
4­Wire Heat/Cool System
5­Wire/Heat Cool System
Single­Stage Heat Pump System
2­Wire Heat Only System
3­Wire Heat Only System
3­Wire Cool Only System
Connect to proper Reversing
Valve Terminals. See Table A