Friedrich RT4 - Manuals

3 Package Contents/Tools Required Package includes: RT4 non-programmable thermostat on base, thermostat cover, wiring labels, screws and wall anchors, Installation, Operation and Application Guide. Tools required for installation: Drill with 3/16” bit, hammer, screwdriver. General Description • The ...

4 ELECTRICAL SHOCK HAZARD – Turn off power at the main service panel by removing the fuse or switching the appropriate circuit breaker to the OFF position before removing the existing thermostat. 1. Turn off power to the heating and cooling system by removing the fuse or switching off the appropriat...

6 Replace the old labels with the enclosed new labels: Replacing Wiring Labels Old New Type F, G G Fan control relay B B Heat active reversing valve Y, Y6 Y Cooling control H, W, 4 W Heating control C C Transformer, common side M, 4, RH, RS, R R Transformer, hot side

7 Setting the Room Temperature (Setpoint Temperature) Step 1: Press the or button; the current temperature setpoint displays. Step 2: Press the or button until the desired temperature setpoint displays. The new temperature setting is automatically saved. After 5 seconds, the display returns to showi...

8 caution! : Do not switch system to cool if the outdoor temperature is below 50°F (10°C). This can damage the air conditioning system and may cause personal injury. Action: Set the Mode switch to Cool . Press the button until the temperature setting is 3°F below the room temperature. Result: The A/...

9 Wiring Diagram NOTE: B terminal used on heat pump models only C R W Y B G C R W Y B O G T H E R M O S T A T F R I E DR I CH P T A C HARDWIRED

10 Troubleshooting Symptom Remedy The system is not turning on Check the wiring (see Installation, Page 4) LCD is blank Check the wiring (see Installation, Page 4) Thermostat is not properly controlling the fan Check that the Gas/Electric switch is set to electric Thermostat is continuously turning ...