Friedrich RT4 User's Manual
Contents
1. e FAX 210 357 4480 www friedrich com2. Manual Changeover IF nt R I A Non Programmable Hardwired Non Programmable Electronic Thermostat Made in USA e For use with Friedrich PTAC and Vert I Pak Systems e 30 Minute Power Loss Memory Retention A Installation Operation amp Application Guide riedrich Table of Contents Parts DIAM BEE 1 Specifications Important Safety Information Package Contents Tools Required General Een WEE 3 To Remove Existing Thermostat To Install Thermostat Replacing Wiring Labels iii oa 6 Operation A Quick Test Wiring Diagrams Troubleshooting CAUTION This thermostat should be installed by trained technicians only Adhere to all local and national codes Disconnect all power to the system before installing removing or cleaning Parts Diagram Celsius Fahrenheit O O Jumper _ O lo IO Heat Pump Gas cal ump Jumper aay Ki ooooooo Electric Gas Electric Reset Button a EE Switch eo oi UL y i Auto On Cool ot Heat A O Mode Switch Fan Switch Specifications Input e Voltage 18 30 VAC Output Maximum 1 amp per terminal 3 amp total for all te
3. displayed Press the v or A button to select desired setting Changing Fahrenheit to Celsius The temperature displays in degrees Fahrenheit as a factory set default Follow these steps to change to degrees Celsius Step 1 Remove the cover Step 2 Move the F C jumper to the desired position F or C using the center pin as a common Step 3 Press the Reset button once and reinstall the cover Your LCD readout changes accordingly Starting the Thermostat Step 1 Move the Fan Auto On switch into the Auto position Step 2 Move the Mode switch to Heat or Cool depending on the season A Quick Test 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 v button until the temperature setting is 3 F below the room temperature Result The A C system and fan should turn on Action Set the Mode switch to Off Result The A C should turn off there may be a fan delay Action Set the Mode switch to Heat Press the button until the temperature setting is 3 F above the room temperature Result The heating systems and fan should turn on there may be a time delay depending on your system Action Set the Mode switch to Off Result The heating system should turn off there may be a fan delay Action Set the Fan switch to On continuous indoor fan operation Result The blow
4. er fan should turn on Action Set the Fan switch to Auto Result The blower fan should turn off If the above test was successful you have a proper installation If not Double check that wires are securely connected and are connected to the proper terminals Consult the troubleshooting section see Page 10 Wiring Diagram Diagram HARDWIRED D lt D O OO PJ VU LO ss HD m nn om O W SD CO gt cd OD OS Dm TI d NOTE B terminal used on heat pump models only 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 on and off Increase the temperature differential see Setting a New Temperature Differential Page 7 Temperature display is not accurate Your thermostat has two options for temperature readout Fahrenheit default or Celsius check that the jumper is properly set to your preference Plug the hole for wiring behind the thermostat with non flammable insulation to prevent airflow into the thermostat 10 riedrich Friedrich Air Conditioning Co Post Office Box 1540 San Antonio Texas 78295 1540 4200 N Pan Am Expressway e San Antonio Texas 78218 5212 210 357 4400
5. ion Drill with 3 16 bit hammer screwdriver General Description e The RT4 thermostat is a hardwired digital mercury free non programmable electronic thermostat e Compatible with single stage heating cooling systems and heat pump systems e Separate setpoints for heating and cooling Freeze Protection Feature Protects pipes from freezing If the room temperature drops to 40 F the thermostat automatically turns on the heat the thermostat must be in the Heat position Built in Compressor Protection for Air Conditioners to protect the A C s compressor there is a 5 minute delay between the system turning off and the A C starting 30 minute power loss memory retention protection To Remove Existing Thermostat or switching the appropriate circuit breaker to the OFF position before removing the existing CH ELECTRICAL SHOCK HAZARD Turn off power at the main service panel by removing the fuse thermostat 1 Turn off power to the heating and cooling system by removing the fuse or switching off the appropriate circuit breaker 2 Remove cover of old thermostat This should expose the wires 3 Label the existing wires with the enclosed wire labels before removing wires See table on Page 6 for old and new label identification 4 After labeling wires remove wires from wire terminals 5 Remove existing thermostat base from wall 6 Refer to the following section for instructions on how to install this thermostat To Ins
6. per connection Double check that each wire is connected to the proper terminal Seal hole for wires behind thermostat with non flammable insulation or putty Set the Gas Electric switch to electric and heat pump jumper to NON HP Set the temperature scale jumper to Fahrenheit or Celsius Replace cover on thermostat by snapping it in place Turn on power to the system at the main service panel Replacing Wiring Labels Replace the old labels with the enclosed new labels Old New Type RG G Fan control relay B B Heat active reversing valve Y Y6 Y Cooling control H W 4 W Heating control C Transformer common side M 4 RH RS R R Transformer hot side Operation Setting the Room Temperature Setpoint Temperature Step 1 Press the v or A button the current temperature setpoint displays Step 2 Press the v or A button until the desired temperature setpoint displays The new temperature setting is automatically saved After 5 seconds the display returns to showing the current room temperature Setting a New Temperature Differential The default temperature differential is 1 When your room temperature varies by 1 F the thermostat turns on your system If you notice your system turning on and off too frequently increase the temperature differential Step 1 Remove the cover and press the Reset button once Step 2 For the first 10 seconds of operation the temperature differential is
7. rminals Temperature Ranges Temperature control range 45 F to 90 F 7 C to 32 C Accuracy 1 F 0 5 C e Differential range 1 F to 3 F 0 5 C to 1 5 C Accuracy 1 F 0 5 C e System configurations Single stage heat pump Terminations R C W Y B O G Room temperature e Note This thermostat is designed for Single stage electric setpoint heating heating cooling systems and heat pump Room temperature systems It will retain your setpoint temperatures in memory for up to 30 minutes during a power outage Temperature differential setting Important Safety Information e Always turn off the thermostat before installing removing cleaning or servicing turn off the power at the main power source by unscrewing fuse or switching off circuit breaker Do not switch to Cool if outside temperature is below 50 F 10 C this could damage your A C system and cause injury Do not install on voltages higher than 30 VAC e All wiring must conform to local and national building and electrical codes and ordinances e While cleaning do not get soap directly on thermostat switches or LCD readout only use a damp cloth with a mild soap to wipe the outside of the thermostat cover 2 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 installat
8. tall 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 IMPORTANT Thermostat installation must conform to local and national building and electrical codes and ordinances Note Mount the thermostat about five feet above the floor Do not mount the thermostat on an outside wall in direct sunlight behind a door or in an area affected by a vent or duct 1 Turn off power to your system Move the Mode switch to Off 2 Move the Fan switch to Auto 3 To remove cover insert and twist a coin or screwdriver in the slots on the sides of the thermostat To Install Thermostat continued 4 ERST gt 12 13 14 15 16 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 Mark the placement of the mounting holes Set thermostat base and cover away from working area Using a 3 16 drill bit drill holes in the places you have marked for mounting Use a hammer to tap supplied anchors into mounting holes Align thermostat base with mounting holes and feed the control wires through wire opening Use supplied screws to mount thermostat base to wall CAUTION Be sure exposed portion of wires does not touch other wires Tighten screws on terminal block Gently tug wire to be sure of pro
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