Friedrich RT4 User Manual

Manual ChangeoverNon-Programmable HardwiredRT4Non-Programmable Electronic ThermostatInstallation, Operation & Application Guide• For use with Frie

8caution!: 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 per

9Wiring DiagramNOTE: B terminal used on heat pump models onlyCRWYBGCRWYBOGTHERMOSTATFRIEDRICHPTACHARDWIRED

10TroubleshootingSymptom RemedyThe system is not turning on Check the wiring (see Installation, Page 4)LCD is blank Check the wiring (see Installation

Friedrich Air Conditioning Co.Post Office Box 1540 • San Antonio, Texas 78295-15404200 N. Pan Am Expressway • San Antonio, Texas 78218-5212(210) 357-4

Table of ContentsParts Diagram ...

1Parts DiagramMode Switch Fan SwitchCelsius/Fahrenheit JumperReset ButtonHeat Pump/Non-Heat Pump JumperGas/Electric SwitchF–CNON–HP HPCool HeatOffOnAu

2SpecificationsInput: • Voltage: 18-30 VAC Output: • Maximum: 1 amp per terminal (3 amp total for all terminals)Temperature Ranges: • Temperature c

3Package Contents/Tools RequiredPackage includes: RT4 non-programmable thermostat on base, thermostat cover, wiring labels, screws and wall anchors,

4ELECTRICAL SHOCK HAZARD – Turn off power at the main service panel by removing the fuse or switching the appropriate circuit breaker to the OFF posit

5To Install Thermostat (continued)4. Put thermostat base against the wall where you plan to mount it (Be sure wires will feed through the wire openin

6Replace the old labels with the enclosed new labels:Replacing Wiring LabelsOld New TypeF, G G Fan control relayB B Heat active reversing valveY, Y6 Y

7Setting the Room Temperature (Setpoint Temperature)Step 1: Press the or button; the current temperature setpoint displays. Step 2: Press the or