2
3
Identify the existing HVAC System Type from the list below.
Indoor Unit Type
System Type
Gas Furnace
Single Stage Gas Furnace
1 Stage Cooling
Multi Stage Gas Furnace
1 Stage Cooling
2 Stage Cooling
Electric Furnace or
Air Handler
Single Stage PSC Blower, Electric Furnace or Air Handler
1 Stage Cooling
1 Stage Heat Pump
Multi Stage, Variable Speed Blower, Electric Furnace or Air Handler
1 Stage Cooling
1 Stage Heat Pump
2 Stage Cooling
2 Stage Heat Pump
CAUTION: EQUIPMENT DAMAGE HAZARD - Improper system type selection can lead to equipment
damage or high utility costs. Use the System Type list to properly select and setup the control to ensure proper
heating and cooling system operation.
4
Determine if your system has a 24 VAC common wire which is required to power the thermostat.
a.
If your existing thermostat has a terminal labeled C, X, B, or COM with a wire connected to it, skip to step 6.
b.
If your thermostat does not have a C, X, B, or COM terminal, or does not have a wire connected to it, go to step 5.
2
Remove the existing thermostat cover from the wall plate.
Leave wires attached.
Consult instructions that came with existing thermostat as needed.
MERCURY NOTICE
When this control is replacing an old control that contains mercury in a sealed tube, do
not dispose of your old control in the trash. Dispose of properly. Contact your local waste
management authority for instructions regarding recycling and proper disposal of the old
control.
A listing of heating, ventilating and air conditioning wholesalers that participate in the
Thermostat Recycling Corporation’s recycling program are available at
www.thermostat-recyle.org.
Wall plate
Thermostat cover
The look of the existing
thermostat may vary
1
WARNING
Voltage hazard. Can cause electrical shock or equipment damage. Disconnect power to heating and
cooling equipment before beginning installation.
Physical Installation and Wiring
