RT5 1 Heat/1 Cool Manual Changeover Battery or Hardwired Non-Programmable Electronic Thermostat • For use with Friedrich PTAC units ONLY • Backlit Display • Filter Check • Status Indicator Light • Relay Outputs (minimum voltage drop in thermostat) • Two-Speed Fan Installation, Operation & Application Guide
Table of Contents Parts Diagram............................................................................................................................................... 1 Specifications ............................................................................................................................................... 2 Important Safety Information ........................................................................................................................
Parts Diagram 1
Specifications Electrical rating: • 24 VAC (18-30 VAC) • DC Power: 3.0 VDC (2 “AA” batteries included) • 1 amp maximum per terminal • 3 amp maximum total load Temperature control range: 45°F to 90°F (7°C to 32°C) Accuracy: ± 1°F (± 0.
To Remove Existing Thermostat 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 the appropriate circuit breaker off. 2. Remove cover of old thermostat. This should expose the wires. 3. Label the existing wires with the enclosed wire labels before removing wires. 4.
To Install Thermostat (continued) 2. To remove cover, insert and twist a coin or screwdriver in the slots on the sides of the thermostat. 3. Put thermostat base against the wall where you plan to mount it (Be sure wires will feed through the wire opening in the base of the thermostat). 4. Mark the placement of the mounting holes. 5. Set thermostat base and cover away from working area. 6. Using a 3/16” drill bit, drill holes in the places you have marked for mounting. 7.
HARDWIRED PRE-INSTALLED JUMPER C F R I E D R I C H C RH P T A C R RC W W Y Y B B O GL GL GH GH T H E R M O S T A T 5
Configuration Mode The configuration mode is used to set the RT5 to match your heating/cooling system. The RT5 functions with Friedrich PTAC models. Ensure that the thermostat is configured for air conditioning with ELECTRIC HEAT ONLY. To configure the RT5, perform the following steps: 1. Remove the cover of the thermostat by gently pulling on one of the corners. 2. Simultaneously hold the SW5 and SW6 buttons in for 5 seconds while the RT5 is in OFF mode. 3.
Configuration Mode Settings (continued) 3. Temperature Differential (1°F to 3°F) (0.5°C to 1.5°C) – Set the number of degrees between your “setpoint” temperature and your “turn on” temperature. or button to set differential value. Press the Press the SW6 button to advance to the next screen. 4. Minimum Cool Setpoint (45°F to 75°F) (7°C to 24.0°C) Adjust to control the minimum Cool set temperature allowed. or button to select. Press the Press the SW6 button to advance to the next screen.
6. Room temperature offset (+9°F to -9°F) (+4.5°C to -4.5°C) Adjust to calibrate displayed room temperature to match actual room temperature. Note: When not set to 0, ROOM will display or button to select. Press the Press the SW6 button to advance to the next screen. SET ROOM 7. Maximum compressor cycles allowed per hour (-, 2-6) - = as many as needed, 2-6 = maximum cycles/hour Press the or button to select. Press the SW6 button to advance to the next screen. SET ROOM 8.
Testing the Thermostat Once the thermostat is installed, it should be thoroughly tested. caution!: Do not energize the air conditioning system when the outdoor temperature is below 50 degrees. It can result in equipment damage or personal injury. Cool Test 1. 2. 3. 4. Slide Mode switch to Cool mode. Adjust set temperature so it is 5 degrees below room temperature. Air conditioning should come on within a few seconds. Status indicator may come on.
(Testing the thermostat continued from Page 9) Fan Test 1. Slide Fan switch to On position. 2. Indoor fan turns on. 3. Slide Fan switch to Auto position. 4. Indoor fan turns off. Auto On Auto On Mode of Operation The RT5 is a single-stage heat, single-stage cool thermostat. The RT5 can use 24 VAC or batteries as a power supply. The RT5 can be hardwired and have no batteries installed in the battery compartment. It can also run on battery power only.
Troubleshooting Symptom Remedy No display For Hardwired Installation Check for 24 VAC at thermostat; display is blank when 24 VAC is not present For Battery Installation Display is blank when batteries are drained or installed incorrectly System fan does not come on properly Verify wiring is correct Thermostat turns on and off too frequently Adjust temperature differential (see “Temperature Differential,” Step 3, Page 6) Check position of gas/electric switch Fan runs continuously Check fan On/Auto
Friedrich Air Conditioning Co. Post Office Box 1540 • San Antonio, Texas 78295-1540 4200 N. Pan Am Expressway • San Antonio, Texas 78218-5212 (210) 357-4400 • FAX (210) 357-4480 www.friedrich.
