Friedrich RT6 - User Manual

Icon Descriptions
Specifications
Electrical rating: •24VAC(18-30VAC)
 •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(±0.5°C)
System congurations:2-stageheat,1-stagecool,heatpump,electric
Timing:Anti-shortCycle:4minutes(bypassanti-shortcycledelaybyreturningtoOFFmodefor5seconds)
 BacklightOperation:10seconds
Terminations:R,C,GL,GH,O/B,Y,W
RT6
Electronic Thermostat
Installation, Operation & Application Guide
• 1-Stage Heat/1-Stage Cool Systems
• Congurable to: 2-stage heat pump
• Large Display With Backlight
• Selectable Fahrenheit or Celsius
Parts Diagram
Conguration
switch
Lo/Hifan
switch
Reset
switch
Left(system)
button
Right(fan)
button
Downbutton
Upbutton
YO/BGHGLCR W
RESET CONFIG
Package Contents/Tools Required
Package includes:RT6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
Important Safety Information
WARNING! : Always turn off power at the main power supply before installing, cleaning, or removing
thermostat.
• Thisthermostatisfor24VACapplicationsonly;donotuseonvoltagesover30VAC
• Allwiringmustconformtolocalandnationalelectricalandbuildingcodes
• Donotuseairconditioningwhentheoutdoortemperatureisbelow50degrees;thiscandamageyourA/Csystem
andcausepersonalinjuries
• Usethisthermostatonlyasdescribedinthismanual
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. 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 Install 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 ve feet above the oor. 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theheatingandcoolingsystembyremovingthefuseorswitchingtheappropriatecircuit
breakeroff.
2. Toremovecover,pullgentlyattheseamatthetop.
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. Useahammertotapsuppliedanchorsinmountingholes.
8. Alignthermostatbasewithmountingholesandfeedthecontrolwiresthroughslitinthermalintrusionbarrierand
intowireopening.
9. Usesuppliedscrewstomountthermostatbasetowall.
10. Insertstripped,labeledwiresinmatchingwireterminals.
 CAUTION!:Be sure exposed portion of wires does not touch other wires.
11. Gentlytugwiretobesureofproperconnection.Doublecheckthateachwireisconnectedtotheproper
terminal.
12. Turnonpowertothesystematthemainservicepanel.
13. Congurethermostattomatchthetypeofsystemyouhave.
14. Replacecoveronthermostatbysnappingitinplace.
15. Testthermostatoperationasdescribedin“TestingtheThermostat”.
Terminal Designator Descriptions
 R – 24VAChot
 C – 24VACcommon
 O/B – Congurable
 O–Coolactivereversingvalve(FreidrichPTHP)
 B–Heatactivereversingvalve(FreidrichVert-I-Pak,Kuhl+HP)
 Y – 1ststagecool,1ststageheatforheatpumps
 W – 1ststageheatfornon-heatpumpsystems,auxiliaryheatforHPsystems
 GL – Lowfan
 GH – Highfan
RT6 Output Chart
Wiring Diagrams
Heat/Cool Systems Heat pump with electric backup
120
VAC
24VAC
LowFan
HighFan
Compressor
ReversingValve
AuxiliaryHeat
Transformer
C
GL
GH
O/B
Y
W
R
120
VAC
24VAC
LowFan
HighFan
Cool
Heat
Transformer
C
GL
GH
O/B
Y
W
R
Fanoperationicon
Coolingoperationicon
Heatingoperationicon
Heatsetpointwhenblinking
Coolsetpointwhenblinking
Roomtemperature
offsetactivated
COOL
HEAT
Configuration
1
ST
Cool 1
ST
Heat 2
ND
Heat
Heat/CoolandsinglestageHPmodels ELC Y,G W,G,B N/A
PDH(PTHP)modelsonly HP‘O’Cong Y,G,O Y,G Y,W,G
TheRT6thermostatiscongurablefordifferentsystems.Thecongurationdirectlyaffectstheoutputs.
Usetheoutputcharttocorrectlycongureandwirethethermostattoyoursystem.
OFF
1. VerifytheRT6isintheOFFmode.
 PresstheSYS(left)buttonuntiloffmodedisplays.
2. Removethecoverofthethermostatbygentlypullingnearoneofthecornersat
thetopofthethermostat.
Configuration Mode
Presstheupordownbuttontochangesettingswithineachscreen.
Toexitcongurationmode,presstheCONFIGswitchfor1second.
Presstherightbuttontoadvancetothenextscreen.
Note:Pressing the left button will return you to the previous screen.
Down
button
Up
button
Left
button
Right
button
ThecongurationmodeisusedtosettheRT6tomatchyourheating/coolingsystem.TheRT6functionswithheat
pump,airconditioning,orelectricheatsystems.
Note: Thermostat comes congured for 1-stage heat / 1-stage cooling for use with all heat/cool and single-stage heat
pump models.For Friedrich PTHP models follow the instructions below to congure the thermostat for two-stage
heat pump operation using the ‘O’ terminal.
ToconguretheRT6,performthefollowingsteps:
3. PresstheCONFIGbuttonfor1secondwhiletheRT6isinOFF mode.
CONFIG

Friedrich RT6 Specifications

General

Stages	1 Heat/1 Cool
Power Source	Battery
Hold Function	Yes
Backlight	Yes
Battery Life	Up to 1 Year

Summary

Thermostat Installation and Removal

Installing the RT6 Thermostat

Detailed steps for installing the thermostat, including safety precautions and wiring.

Removing the Existing Thermostat

Instructions for safely removing an old thermostat, including labeling wires.

Thermostat Features and Specifications

Parts Diagram and Wiring

Illustrates thermostat components and provides wiring diagrams for various systems.

Icon and Terminal Descriptions

Explains the meaning of thermostat icons and terminal designators.

Technical Specifications

Lists electrical ratings, temperature control range, accuracy, and system configurations.

Operation and Configuration

Configuration Mode Settings

Guides users through setting up the thermostat for different heating/cooling systems.

Operating Modes Explained

Details the OFF, Heat, and Cool modes of operation for the thermostat.

Set Point Adjustment

Instructions on how to adjust the heat and cool set points.

Testing the Thermostat

Procedures for testing heating, cooling, and fan functions after configuration.

Troubleshooting and Support

Troubleshooting Common Issues

Provides solutions for common thermostat problems like inoperability or cycling issues.

Button Functions Overview

Explains the function of each button on the thermostat interface.