How to Wire a 3M-22 Filtrete Room Thermostat For 2-wire Heating Only Systems | ||
Thermostat Terminal ID | Wire Color or ID | Two-Wire Heat Thermostat Hookup - Comments |
White or W | White wire coming to the thermostat from the heater or from the secondary (C) terminal on the transformer, this wire connects the heat. | |
Red or R or RH | Red wire coming to the thermostat from transformer secondary (R) terminal. This connects the heat power. Leave in place the jumper wire between RH and RC. | |
C if present | If a third 'C' wire is present this wire is used to provide power to the 3M-22 thermostat. Otherwise this thermostat is powered only by its batteries. |
How to Wire a 3M-22 Filtrete Room Thermostat For 3-Wire Heat Systems | ||
Thermostat Terminal ID | Wire Color or ID | Comments |
White or W | W connects to heat | |
Red or R or RH | RH connects to heat power | |
Green or G or F (fan) | This wire (if present) controls the fan in forced warm air systems, fan convector heaters, and similar systems that use a fan. | |
C - Common | If a 'C' wire is also present this wire is used to provide power to the 3M-22 thermostat. Otherwise this thermostat is powered only by its batteries. |
How to Wire a 3M-22 Filtrete Room Thermostat For 4-Wire Heating & Air Conditioning Systems | ||
Thermostat Terminal ID | Wire Color or ID | Comments |
White or W | W connects to heat | |
Yellow or Y | Y connects to the cooling compressor/condenser unit | |
Red or R or RH | RH connects to heat power | |
Green or G or F (fan) | This wire (if present) controls the fan in forced warm air systems, fan convector heaters, and similar systems that use a fan. | |
C - Common | If a 'C' wire is also present this wire is used to provide power to the 3M-22 thermostat. Otherwise this thermostat is powered only by its batteries. |
How to Wire a 3M-22 Filtrete Room Thermostat For 4-Wire Heat Pump System | ||
Thermostat Terminal ID | Wire Color or ID | Comments |
O or B wire | Connect the O or B wire to terminal O - this operates the reversing or 'change-over' valve that switches between heating & cooling mode. If both O & B wires are present (as with Trane heat pumps), connect O wire to O terminal For Trane heat pumps connect the B wire to the C terminal. For other HVAC equipment, tape off the B wire. Watch out: do not connect the B wire to the B terminal on this thermostat. | |
Yellow or Y | Y connects to the cooling compressor/condenser unit | |
Red or R or RH | RH connects to heat power | |
Green or G or F (fan) | This wire (if present) controls the fan in forced warm air systems, fan convector heaters, and similar systems that use a fan. | |
C - Common | If a 'C' wire is also present this wire is used to provide power to the 3M-22 thermostat. Otherwise this thermostat is powered only by its batteries. |
How to Wire a 3M-22 Filtrete Room Thermostat For 5-Wire Heating & Air Conditioning Systems | ||
Thermostat Terminal ID | Wire Color or ID | Comments |
White or W | W connects to heat | |
Yellow or Y | Y connects to the cooling compressor/condenser unit | |
Jumper wire between these two terminals | Remove this jumper wire or clip so that RC and RH are no longer connected together | |
Red or R or RH | RH connects to heat power | |
RC wire | RC connects power | |
Green or G or F (fan) | This wire (if present) controls the fan in forced warm air systems, fan convector heaters, and similar systems that use a fan. | |
C - Common | If a 'C' wire is also present this wire is used to provide power to the 3M-22 thermostat. Otherwise this thermostat is powered only by its batteries. |
How to Wire a 3M-22 Filtrete Room Thermostat For 5-Wire Heat Pump with Auxiliary or Backup Heat | ||
Thermostat Terminal ID | Wire Color or ID | Comments |
O or B wire | Connect the O or B wire to terminal O - this operates the reversing or 'change-over' valve that switches between heating & cooling mode. If both O & B wires are present (as with Trane heat pumps), connect O wire to O terminal For Trane heat pumps connect the B wire to the C terminal. For other HVAC equipment, tape off the B wire. Watch out: do not connect the B wire to the B terminal on this thermostat. | |
W2 wire | The W2 wire controls the auxiliary heat or backup heat source. | |
Yellow or Y | Y connects to the cooling compressor/condenser unit | |
Red or R or RH | RH connects to heat power | |
Green or G or F (fan) | This wire (if present) controls the fan in forced warm air systems, fan convector heaters, and similar systems that use a fan. | |
C - Common | If a 'C' wire is also present this wire is used to provide power to the 3M-22 thermostat. Otherwise this thermostat is powered only by its batteries. |
How to Wire a 3M-22 Filtrete Room Thermostat For Heat Pump with Two-Stage Auxiliary or Backup Heat | ||
Thermostat Terminal ID | Wire Color or ID | Comments |
White or W | W or W1 operates the auxiliary stage 1 backup heat | |
W2 wire | W2 operates the auxiliary stage 2 backup heat | |
Yellow or Y | Y or Y1 operates the first stage cooling system | |
Y2 wire | Y2 operates the second stage of 2-stage cooling systems | |
Red or R or RH | RH connects to heat power | |
C - Common | If a 'C' wire is also present this wire is used to provide power to the 3M-22 thermostat. Otherwise this thermostat is powered only by its batteries. |