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White Rodgers 0037-4693
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(For use on 24 Volt AC Heat/Cool and Heat-Only Systems) 1F60-22 SETBACK THERMOSTAT Homeowner: Save this booklet for future use! INSTALLATION & OPERATING MANUAL PHOTO --POSITION ONLY!
Transcript
Page 1: White Rodgers 0037-4693

(For use on 24 Volt AC Heat/Cool and Heat-Only Systems)

1F60-22SETBACKTHERMOSTAT

Homeowner: Save this booklet for future use!

INSTALLATION &OPERATING MANUAL

PHOTO --POSITION ONLY!

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Congratulations!You have selected the 1F60-22 Setback thermostat. This state-of-the-art thermostatenables you to enjoy maximum comfort and convenience. This thermostat automati-cally changes temperature settings, which keeps your home comfortable and in-creases your system’s efficiency while you save time.

Your new thermostat is....• easy to install. You only need one regular screwdriver — all other hardware is

included.• easy to operate.• equipped with built-in minimum timing cycles, which increase system efficiency

and life.

Please read this manual thoroughly before beginning thermostat installation. If youhave questions you may call our technical service department at 1-314-577-1300 ortoll free at 1-800-876-TECH (8:00 AM to 4:30 PM CST).

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In This Guide . . .Your New Thermostat's Features . . . . . . 4Check Your Thermostat's Location. . . . . 5Observe These Safety Precautions . . . . . 6Your New Thermostat's

Components . . . . . . . . . . . . . . . . . . 7Removing the Old Thermostat . . . . . . . . 8Installing Your New Thermostat . . . . . . 8Setting Option Switches . . . . . . . . . . . . . 12Testing Your Thermostat . . . . . . . . . . . . 13Operating Your Thermostat . . . . . . . . . 15

The DisplayThe Time Set ButtonThe Setback ButtonThe SwitchesMinimum Timing Cycles

Programming Your Thermostat . . . . . . 21Planning for Your NeedsEntering Your Program

Maintaining Your Thermostat . . . . . . . 28Replacing the BatteriesReplacing the FuseTroubleshooting Your

Thermostat

Homeowner: Save this booklet for future use!

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YOUR NEW THERMOSTAT’S FEATURES• This thermostat incorporates easy

one-finger operation.• The thermostat has a liquid crystal

display (LCD) that alternatelydisplays time and temperature andshows system status. Celsiustemperature display is optional.

• The thermostat has indicators forAM/PM mode, “setback on”, “coolon”, and “heat on”.

• The thermostat divides the time ofday into 15-minute blocks, provid-ing 48 possible setbacks over a 24-hour period.

• To provide higher efficiency andbetter temperature control, and tohelp increase the life of your system,

this thermostat has automaticminimum cycle on and off timing.

• During power outages, the thermo-stat is powered by two standard1.5V watch batteries. One set ofbatteries is included with yourthermostat. Thermostat program-ming and clock operation are notaffected by power outages whenbatteries are installed.

• The thermostat has a temperaturedifferential switch for controllingtemperature within either 1° F or 3°Fof the set temperature.

• This thermostat controls heat/cool,heat-only, and electric heat systems.

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• This thermostat is capable of meet-ing HUD requirements (may befield-disabled). This thermostat

also meets all state and federalenergy efficiency requirements.

• drafts or dead air spots behind doorsand in corners.

• direct exposure to hot or cold airblowing from ducts.

• direct exposure to sunlight or heatfrom appliances.

• pipes or chimneys located behindthe wall where the thermostat islocated.

• unheated areas behind the thermo-stat, such as an outside wall.

CHECK YOUR THERMOSTAT’S LOCATION

You should install your thermostat aboutfive feet (1.5 meters) above the floor in anarea with good air circulation andaverage temperature. Normally, you cansimply replace your old thermostat withyour new one.

However, you may consider changingthe thermostat’s location if the thermo-stat is affected by:

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OBSERVE THESE SAFETY PRECAUTIONSWARNING

• DO NOT USE on circuits exceedingspecified voltage -- higher voltagewill damage thermostat, and maycause shock or fire hazard.

• DO NOT SHORT OUT TERMI-NALS on gas valve or primarycontrol to test. Shorts or incorrectwiring will burn out heat anticipa-tor, and may cause personal injuryand/or property damage.

• DISCONNECT POWER at the mainfuse or circuit breaker box beforebeginning thermostat removal/installation. This will preventelectrical shock and/or damage tothe heating/cooling system orthermostat.

CAUTION• If in doubt about whether you

wiring is millivolt, line, or lowvoltage, have it inspected by aqualified heating/air conditioningcontractor.

• Do not exceed specification ratings(24 v AC -- 30v AC max., 1 amp.)

• Wiring must conform to local andnational codes and ordinances.

• This thermostat is a precisioninstrument and should be handledcarefully. Rough handling ordistorting components could causethe thermostat to malfunction.

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YOUR NEW THERMOSTAT’S COMPONENTSYour thermostat consists of two parts:the base and the cover. To remove thecover, grasp it and pull it out from thebase. Take a few minutes to becomefamiliar with the location of switches andbuttons on the thermostat. You will usethem during installation and operation ofyour new thermostat. To replace thecover, align the cover with the base andpush until it snaps into place. Do notforce the cover onto the base, as this maydamage the thermostat.

1. Liquid Crystal Display (LCD)2. 1°/3° Differential Switch3. Fuse4. Terminal Screws5. Temperature-Set Sliding Switch6. Gas/Electric Heat Switch7. Reset Button

8. Fan Switch (used on heat/cool systems only)9. Setback Switch10. System (Cool-Off-Heat) Switch11. Batteries12. SET BACK Button13. TIME SET Button14. F°/C° Switch

Y G RW°F

°C

3° 1°

1

2 3 4

5

6

78910111213

Figure 1. Thermostat base

14

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REMOVING THE OLD THERMOSTAT1. Disconnect 120v AC power.2. Remove the cover from the old

thermostat.3. Remove terminal wires one at a time.

As you remove each wire, tag the

wire with the terminal identification(such as Y, W, R) as shown on the oldthermostat base.

4. When all wires are removed, removethe old thermostat base from the wall.

1. Disconnect120v AC power.2. Remove the thermostat cover from

the base.3. Pull the wires through the opening

above the terminal screws on thethermostat base. Check the wireends; they should be stripped andcorrosion-free.

INSTALLING YOUR NEW THERMOSTAT

STOP!If your system has five or six wires, readthe following cautionary statements. Ifyour system has two or four wires, godirectly to step 4.

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If you have a two-transformer(5-wire) system and both heatand cool transformer secondar-ies are grounded, you cannotuse this thermostat, even if thetransformers are properlyphased.

Never connect the common(neutral) wire on the 24v ACside of the transformer to thethermostat.

For systems where neither oronly one of the transformers isgrounded, you may use thisthermostat only if the transform-ers are properly phased. Use fig.4 to wire the thermostat. If youare not sure of your particularapplication, contact a qualifiedservice person or call the techni-cal service number foundelsewhere in this booklet.

4. Connect wires to the appropriateterminals on the base. See table 1 andfigs. 2, 3, and 4 to match the taggedwires with the correct terminals.

CAUTION NOTE

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W Y G R

Thermostat Terminals

Transformer

24v 120v ACHeatingSystem

Neutral

Hot

Figure 3. 4-Wire Heat/Cool

Fan Relay

Cooling System

W Y G R

Thermostat Terminals

Transformer

24v 120v ACHeatingSystem

Neutral

Hot

24v 120v AC

Hot

Neutral

Transformer

Figure 4. 5-Wire (2-transformer) Heat/Cool

Fan Relay

Cooling System

TYPICAL SYSTEM WIRING DIAGRAMS

W Y G R

Thermostat Terminals

Transformer

24v 120v ACHeatingSystem

Neutral

Hot

Figure 2. 2-Wire Heat-only

OLD THERMOSTATMARKINGS

W-RMARKINGS

R, RC and/or RH*, or V R

G or F G

Y, C, or Y6 Y

W, H, or 4 W

* On systems that have both RC and RH wires, see cautionary statements for 5-wire system

Table 1. THERMOSTAT WIRING

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5. When connections are complete,push excess wire back into the wall’sopening. Plug the opening with afire-resistant insulating material, suchas fiberglass insulation, to preventdrafts that could affect thermostatoperation.

6. Attach the thermostat base to the wallusing the two screws provided.

7. Check the wires on the thermostatbase terminals; they should not betouching one another or any otherpart of the thermostat.

8. Set the option switches to desiredpositions (see SETTING OPTIONSWITCHES).

9. Reconnect 120v AC power to system.The thermostat display should nowbe operating.

If 120v AC power is to bedisconnected immediately afterthermostat installation, omitstep 10 (to conserve batterypower). Perform step 10 whenpower is restored to the system.

10. Pull battery insulation tab downfirmly and remove. This will engagethe batteries.

11. Replace the thermostat cover.Ensure that the system switch is inthe Off position before you begintesting (see TESTING YOUR

THERMOSTAT).

NOTE

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SETTING OPTION SWITCHESThe 1°/3° DIFFERENTIAL SWITCH islocated to the right of the display on thebase. The thermostat is preset at 1°F. Atthis setting, the thermostat will maintainthe room temperature within 1°F of theset temperature (this results in morefrequent system on/off cycles). If youmove the switch to the left, the thermo-stat will maintain the room temperaturewithin 3°F of the set temperature (result-ing in longer on/off cycles). Normally,the 1°F setting is used.

The F°/C° SWITCH is located below thedisplay on the base. When you move theswitch up, the temperature will be

displayed in degrees Fahrenheit. Whenyou move the switch down, the tempera-ture will be displayed in degrees Celsius.

The GAS/ELECTRIC SWITCH is locatedabove the setback switch on the base.When you move the switch right, the fanwill turn on immediately when thefurnace turns on (for electric heaters).When you move the switch to the left,the fan will come on after the furnacewarms up (for gas furnaces).

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TESTING YOUR THERMOSTATFollow these steps to ensure that yourthermostat is correctly installed. Youmay want to refer to YOUR NEWTHERMOSTAT’S COMPONENTS tohelp you locate switches you will useduring testing. If at any time duringtesting your system does not work asindicated, stop testing immediately,disconnect the batteries and the 120vAC power, and check thermostatwiring. If wiring is correct, see TROU-BLESHOOTING YOUR THERMO-STAT.

1. Move the system (Cool-Off-Heat)switch to the Off position.

If you have a heat only system,omit steps 2 and 3. Go directlyto step 4.

2. (For heat/cool systems only). Movethe fan switch to the Cont. position.The system fan should come on.Move the fan switch to the Autoposition. The system fan should turnoff.

NOTE

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If the outside temperature isbelow 40°F, OMIT STEP 3.Running the air conditionerwhen the temperature is below40°F can damage the compres-sor.

3. (For heat/cool systems only). Movethe system switch to Cool. Move thetemperature-set switch until it is setto a temperature that is approxi-mately 5°F below the displayed roomtemperature. The air conditionershould come on within two minutes.Move the temperature-set switch at

least 5°F above the displayed roomtemperature. The air conditionershould shut off within two minutes.

4. Move the system switch to Heat.Move the temperature-set switchuntil it is set to a temperature that isapproximately 5°F above the dis-played room temperature. Thefurnace should come on within twominutes. Move the temperature-setswitch at least 5°F below the dis-played room temperature. Thefurnace should turn off within twominutes (although the fan maycontinue to run for several moreminutes).

CAUTION

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Use this section to learn about theoperation of the display, buttons, andswitches on your new thermostat. Youwill also find information about thethermostat’s built-in minimum timingcycles. If you installed your thermostat,you are already familiar with the displayand switch locations. If someone elseinstalled your thermostat for you, youmay want to refer to YOUR NEWTHERMOSTAT’S COMPONENTS tohelp you locate buttons and switches on

the thermostat. After you are familiarwith the operation of your thermostat,refer to PROGRAMMING YOURTHERMOSTAT to set your thermostatfor your needs.Before you begin this section, move thesystem switch to the Off position. Thiswill prevent the system from cycling andcausing possible damage while youexperiment with the buttons andswitches.

OPERATING YOUR THERMOSTAT

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THE DISPLAY

The display indicates system status inthree ways (see fig. 5).

1. AM/PM display: When the A isdisplayed, the time indicated is AM.When the P is displayed, the timeindicated is PM.

2. Time/temperature display: The timedisplay is a 12-hour clock. The

temperature is displayed either indegrees Fahrenheit or degreesCelsius, depending on which optionyou choose (see SETTING OPTIONSWITCHES). The time and tempera-ture are alternately displayed.

3. Indicator arrows: These arrowsindicate which part of the system iscurrently operating. The top arrowindicates that the setback mode isactivated. The middle arrow indi-cates that the heating system isactivated. The bottom arrow indi-cates that the cooling system isactivated (if applicable). If youcurrently have the system switch inthe Off position, there may not beany arrows displayed.

A

P

Figure 5. LCD Display

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THE TIME SET BUTTON

Press and release the time set button.The time setting will advance oneminute. Press and hold down the timeset button. The time setting will advanceone minute per second for four seconds.Then it will advance rapidly through the24-hour time period.

THE SETBACK BUTTON

You will use the setback button toprogram the temperature setback timeperiods you want. Press and release thesetback button. The top arrow on thedisplay should now be visible. Press and

TIMESET

SETBACK

release the setback button again. Thesetback indicator on the display shouldnow be off. You will find more informa-tion about using the setback button inPROGRAMMING YOUR THERMO-STAT.

THE SWITCHES

You use the temperature-set slidingswitch to set the desired room tempera-ture. The actual room temperature mayvary from the temperature you set,depending on setback switch anddifferential option switch settings.

You use the system (Cool-Off-Heat)switch to activate (or deactivate) yoursystem. When the switch is in the Off

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position, all systems will be off. Whenthe switch is in the Heat position, thethermostat will cycle only the heatingsystem. If you have a heating/coolingsystem, when the switch is in the Coolposition, the thermostat will cycle onlythe cooling system.

The setback switch allows you todetermine how much the temperaturewill change during setback periods. Theswitch settings (0°F, 5°F, 10°F, and 15°F)indicate how much the temperature willbe adjusted during setback periods. Youwill find more information about usingthe setback switch in PROGRAMMINGYOUR THERMOSTAT.

You use the fan switch only if you havea heat/cool system. When the switch isin the Auto position, the fan will cycleautomatically when the heat/cool systemturns on. When the switch is in the Cont.position, the fan will run continuously.

The option switches allow you to adjustyour thermostat to meet your needs.You will find more information about theoption switches in SETTING OPTIONSWITCHES.

You use the reset button if you want tocancel any thermostat programming.You also use this button to overrideminimum cycle times.

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reached. After the furnace turns off, itwill not turn on again for at least sixminutes. After six minutes, the furnacewill turn on if the room temperature isbelow the set/setback temperaturerange. The heat indicator arrow on thedisplay will flash if the furnace is waitingto turn on after the six-minute minimumcycle time has expired.

In the cooling mode, once the coolingunit has turned on, it will continue to runfor at least six minutes, even if the set (orsetback) temperature is reached in lessthan six minutes. If the room tempera-ture does not reach the set/setbacktemperature during the minimumperiod, the cooling unit will continue to

MINIMUM TIMING CYCLES

The thermostat has built-in timing cyclecontrols. These controls increase theefficiency of your system and protect thesystem from turning on and off exces-sively (excessive cycling may damage thesystem or shorten its life).

In the heating mode, once the furnacehas turned on, it will continue to run forat least four minutes, even if the set (orsetback) temperature is reached in lessthan four minutes. If the room tempera-ture does not reach the set/setbacktemperature during the minimumperiod, the furnace will continue to rununtil the set/setback temperature is

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run until the set/setback temperature isreached. After the cooling unit turns off,it will not turn on again for at least sixminutes. After six minutes, the coolingunit will turn on if the room temperatureis above the set/setback temperaturerange. The cool indicator arrow on thedisplay will flash if the cooling unit iswaiting to turn on after the six-minuteminimum cycle time has expired.

You may temporarily override theminimum timing cycle in three ways:

• Move the temperature-set slidingswitch at least 5°F from its currentposition.

• Move the system switch from itscurrent position and back (forexample, moving the system switchfrom Heat to Cool and back to Heatagain will override the minimumcycle time).

• Press the reset button to resetprogramming and override mini-mum timing cycle. Pressing thereset button will also cancel anythermostat programming you havedone and reset the time of day to12:00 PM.

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PROGRAMMING YOUR THERMOSTAT Programming your new thermostat iseasy. Follow these procedures forplanning and programming, then youwill be ready to enjoy complete comfortand efficiency.

Please save these instructions!You may want to change yourthermostat programming at afuture date.

NOTE

PLANNING FOR YOUR NEEDS

This thermostat is designed to providecomfort and efficiency by allowing youto program setback time periods. Asetback is a time period during which thethermostat will automatically raise thetemperature (during the cooling season)or lower the temperature (during theheating season). Most users programsetbacks for times when they will besleeping or out of the house. When thesetback time period ends, the thermostatautomatically resets the temperature.The thermostat allows you to programsetbacks in blocks as small as 15 minutes,

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on the quarter hour (6:00 AM to 6:15 AMor 10:30 PM to 10:45 PM are examples ofthe smallest blocks of time you canprogram for a setback).

Look at the sample programming table toget an idea of how you can program yourthermostat. Table 2 shows programmingplans for a household where the home isunoccupied during the day, and for ahousehold where the home is occupiedduring the day.

Use table 3 (or make your own) to planthe programmed setbacks you will need.If you refer to your table while program-ming your thermostat, programming willbe much easier for you. Remember that

Sample program when home is unoccupied during day

TypicalSchedule

Go to bed at 10:00 PM

Wake up at 6:00 AM

Last person leaves for work at 8:15 AM

First person arrives home from work at 5:15 PM

BEGINSetback

Time

10:00 PM

8:00 AM

ENDSetback

Time

5:45 AM

5:00 PM

Table 2. Samples of Typical Program Plans

Sample program when home is occupied during day

Go to bed at 10:00 PM

Wake up at 6:00 AM

10:00 PM

5:45 AM

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Table 3. Your Programming Plan

Your ScheduleBEGINSetback

Time

ENDSetback

Time

you can program up to 48 setbacks in a24-hour period. This may be useful ifpeople in your household work differentshifts, or if your home is unoccupied forshort periods during the day or evening(for example, you may want to use thesetback feature while you attend anevening class).

ENTERING YOUR PROGRAM

Follow these steps to program yourthermostat. Before you begin program-ming, press the reset button to erase anyprograms that you may have enteredwhile experimenting with your thermo-stat.

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You must complete steps 2through 4 within one minute. Ifyou do not complete these stepswithin one minute, start again atstep 1.

1. Look at your programming plantable 3 to determine your firstplanned “begin setback” time, thenpress and hold the time set buttonuntil this time is displayed (alsocheck the display for the correct AMor PM mode).

2. Press the setback button.3. Check the display. The setback

indicator arrow should be on.

4. Look at your programming plantable 3 to determine your firstplanned “end setback “time, thenpress and hold the time set buttonuntil this time is displayed.

5. Press the setback button.6. Check the display. The setback

indicator arrow should be off.Your first setback time is programmed!To program all the setbacks you want,just repeat steps 1 through 6 for eachbegin/end setback time period. Afteryou have programmed all desiredsetback time periods , you may want toreview your programmed setbackperiods. If so, proceed to step 7. If youdon’t want to review your programming,omit step 7 and proceed to step 8.

NOTE

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7. Press and hold the time set button.Watch the display. When a pro-grammed “begin setback” time isdisplayed, the setback indicatorarrow will turn on. You may checkthe programmed “begin setback”time by releasing the time set buttonwhen the indicator arrow turns on(keep in mind that the time displayedwill probably not be the exact timeyou programmed, since it may takeyou a moment to release the buttonafter the indicator arrow turns on).Press and hold the time set buttonagain. When a programmed “endsetback” time is displayed, thesetback indicator arrow will turn off.You may check the programmed“end setback” time by releasing the

time set button when the indicatorarrow goes off. You may keeppressing, holding, and releasing thetime set button until you havechecked all your programmedsetback time periods.

8. Set the time of day by pressing thetime set button until the correct timeis displayed (also check the AM/PMmode).

9. Move the temperature-set slidingswitch (see fig. 6) to the temperatureyou want maintained when the houseis occupied.

10 21 32 °C

Figure 6. Temperature-Set Sliding Switch

• • • • •

•••

50 60 70 80 90 °F

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10. Move the setback switch to thedesired position. The setback switchhas four settings (0°F, 5°F, 10°F, and15°F). This switch tells the thermo-stat how much to adjust the tempera-ture during setback periods. Forexample, if (in the winter) you wantto maintain the temperature at 68°Fwhen the house is occupied, but youwant the temperature to be 63°Fwhen you are sleeping or the house isunoccupied, you should move thesetback switch to 5°F. The thermostatwill then maintain the temperature at5°F below the set temperature during

setback periods. Table 4 showsexamples of possible set temperaturesand setback switch combinations youmight use.

11. Move the system switch to Heat orCool as desired.

Your thermostat is now programmedand will adjust the temperature whensetback program times are displayed.

To reprogram your thermostat, press thereset button to cancel previous program-ming. Then you may reprogram byfollowing the above steps.

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Table 4. Set/Setback Temperature Examples

....during setback periods, the temperature will be....

If set temperaturewhen home isoccupied is...

....and setback switch is set to....

SAMPLE TEMPERATURE/SETBACK TEMPERATURES FOR HEATING SEASON

68°F

72°F

75°F

0°F5°F10°F15°F0°F5°F10°F15°F0°F5°F10°F15°F

68°F63°F58°F53°F72°F67°F62°F57°F75°F70°F65°F60°F

....during setback periods, the temperature will be....

If set temperaturewhen home isoccupied is...

....and setback switch is set to....

SAMPLE TEMPERATURE/SETBACK TEMPERATURES FOR COOLING SEASON

72°F

75°F

79°F

0°F5°F10°F15°F0°F5°F10°F15°F0°F5°F10°F15°F

72°F77°F82°F87°F75°F80°F85°F90°F79°F84°F89°F94°F

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MAINTAINING YOUR THERMOSTATWhen properly installed and maintained,your new thermostat is designed toprovide years of service. This sectioncontains information about replacingbatteries and troubleshooting thethermostat and system. This informationis provided to help ensure that yourthermostat will continue to providecomplete comfort control.

REPLACING THE BATTERIES

Two batteries have been included withyour thermostat. These batteries providepower to the thermostat during anypower interruptions. The thermostat is

not designed to run on battery poweralone, but the batteries will maintainyour programming and the time of dayin the event of a power interruption.Battery life is dependent on systemswitch position and frequency andduration of power interruptions. Tomaintain full battery power at all times,you should replace the batteries once ayear.

The thermostat’s batteries are the sametype used in many watches and digitalclocks. These batteries are available inmost stores that carry watch batteries,

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and the dealer where your thermostatwas purchased should also carry replace-ment batteries.

You may use the following battery typesas replacements: 303BP, WS14,RW22,Type A, 8002, ANSI No. S-15, IECNo. SR44, NEDA No. 1107SO, or equiva-lent.

Follow these steps to replace batteries.

1. Remove the thermostat cover.2. Locate the batteries (they are above

the time set button).3. Gently remove the old batteries. Be

careful not to damage the thermostat.

4. Insert the new batteries with the flat(+) side up.

5. Replace the cover.If you are experiencing short battery life,it may be due to the type or condition ofyour heating/cooling system. To extendbattery life, you should follow one ofthese two procedures.

PROCEDURE 1. Short battery life maybe caused by the opening of the furnace’shigh temperature limit switch during theheating cycle. Limit switch opening maybe related to airflow reduction in thesystem. Airflow reduction is oftencaused by dirty filters, a loose fan belt,blocked cold air returns, or having too

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many registers closed. Check yoursystem to ensure that there are no airflowproblems.

If you continue to experience shortbattery life after fixing airflow problems,your furnace has a limit switch thatfunctions even when airflow is adequate.In this case, a 24 V single-pole , normally-open (SPNO) relay must be added to thesystem using the following procedure.

A qualified service personshould perform this installation.

1. Disconnect 120v AC power from thesystem.

2. Obtain a 24v SPNO relay (No. 8A04-1).

3. Connect the limit switch to thecontact side of the relay (see fig. 7,part B ).

4. Reconnect power to the system. Testthe system and thermostat (seeTESTING YOUR THERMOSTAT).

CAUTION

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Figure 7. Relay Installation

ATypical wiring of gas furnace

showing possible limit switch locationTypical wiring method using SPNO

relay and limit in gas furnace

B

24 v

Trans-former

Limit

Limit

Limit

Thermostat

GasValve

R W

120 v

Limit

Hot Neutral

Relay

24 v

Trans-former

Thermostat

GasValve

R W

120 v

Limit

Hot Neutral

PROCEDURE 2. Shortbattery life may also becaused by repeated powerinterruptions. These furnacescause power interruptionsduring normal operation:

If you own one of thesesystems, you should installthe resistor that was includedwith your thermostat usingone of the three followingmethods (depending onsystem type).

Bryant, Payne, Day & Night, and Carrier Series

579 585580 48KLA

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A qualified service personshould perform the resistorinstallation.

Method 1. (For heat/cool systems only.)

1. Disconnect 120v AC power fromsystem.

2. Install the resistor between the Wand Y terminals on the thermostat(see fig. 8). Do not allow the resistorto come into contact with any otherthermostat components.

CAUTION

Figure 8. Install resistor at thermostat (method 1)

1KΩ, 0.5W resistor

W Y G RD6

D7

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Do not connect the resistor to theR terminal at the thermostat orthe furnace. System damagewill occur.

3. Replace thermostat cover and restorepower to the system.

4. Test thermostat and system opera-tion (see TESTING YOUR

THERMOSTAT).

CAUTION Method 2. (For heat-only or heat/coolsystems.)

This installation requires anadditional wire that will runfrom the furnace low voltageterminal block to the thermostat.

1. Disconnect 120v AC power fromsystem.

2. Attach a wire to terminal C on thefurnace low voltage terminal block.Attach the wire’s other end to theresistor using a wire nut connector.Attach the resistor to the W terminal

NOTE

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on the thermostat (see fig. 9). Donot allow the resistor or wire tocome into contact with any otherthermostat components.

3. Replace the thermostat cover andrestore power to the system.

4. Test thermostat and system opera-tion (see TESTING YOUR

THERMOSTAT).

Furnace Low VoltageTerminal Block

ThermostatTerminals

Four-wire(heat/cool)

Two-wire(heat only)

To Cooling Unit

W

R

Gh

Gc

C

Y

W R G Y

Figure 9. Install resistor betweenthermostat and furnace (method 2)

1KΩ, 0.5W resistor Wire NutConnector

AddedWire

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Method 3. (For heat-only or heat/coolsystems.)

This installation requires anadditional wire that will runbetween the W and C terminalson the furnace low voltageterminal block.

1. Disconnect 120v AC power fromsystem.

2. Attach a wire to terminal C on thefurnace low voltage terminal block.Attach the wire’s other end to the

resistor using a wire nut connector.Attach the resistor to the W terminalon the furnace low voltage terminalblock (see fig. 10). Do not allow theresistor or wire to come into contactwith any other furnace components.

3. Restore power to the system.4. Test thermostat and system opera-

tion (see TESTING YOUR THERMOSTAT).

NOTE

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REPLACING THE FUSE

If the thermostat has been incorrectlywired, or if the thermostat’s specifica-tions were exceeded, you must replacethe fuse. Check and correct the wiringand/or the load, then follow these stepsto replace the fuse.

1. Disconnect the 120v AC power.2. Obtain a 1 amp., 250v, AGC type

Normal-Blo fuse.3. Locate the old fuse above the

thermostat wire terminals. Removethe old fuse.

4. Install the new fuse.5. Replace the thermostat cover and

restore power to the system.

Furnace Low VoltageTerminal Block

ThermostatTerminals

Four-wire(heat/cool)

Two-wire(heat only)

To Cooling Unit

W

R

Gh

Gc

C

Y

W R G Y

Figure 10. Install resistorat furnace (method 3)

1 KΩ, 0.5WResistor

Wire NutConnector

Added wire

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6. Test thermostat and system operation(see TESTING YOUR THERMO-STAT).

TROUBLESHOOTING YOURTHERMOSTAT

If you suspect that your thermostat is notworking correctly, use table 5 to help youisolate the problem. You may be able tosolve the problem yourself, but someprocedures should be performed only bya qualified service person (this is notedin the “Action” column).

If you or your service person cannotsolve the problem using this manual as aguide, you may call our technical serviceline at 1-314-577-1300 or toll free 1-800-876-TECH (8:00 AM to 4:30 PM CST).

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No display 1. Miswired • Check thermostat wiring.

2. No voltage to thermostat

• Remove batteries. Check for 20-24v AC between R & W terminals with system switch in OFF position. If no voltage, check for limit switch operation.

3. Switch in Cool position on heat only system

• Move system switch to Heat position and replace batteries.

Table 5. Troubleshooting Table

INSTALLING YOUR THERMOSTAT

OPERATING YOUR THERMOSTAT; MAINTAINING YOUR THERMOSTAT

------

PROBLEMPOSSIBLE

CAUSE ACTION TO TAKEIN MANUAL,

REFERENCE SECTION ...

Heat will not turn on

1. Not in Heat mode • Move system switch to Heat position.

2. Not calling for heat • Check heat indicator arrow on display. If off, move temperature slide to the right and ensure thermostat is not in setback mode.

OPERATING YOUR THERMOSTAT

OPERATING YOUR THERMOSTAT

3. Bad gas valve, no pilot, bad relay open limit

• Ensure heat indicator arrow is on. Check for voltage at gas valve. Call 800 number for assistance.

OPERATING YOUR THERMOSTAT

4. Blown fuse • Check wiring. Replace fuse. MAINTAINING YOUR THERMOSTAT

4. Blown fuse • Check wiring. Replace fuse. MAINTAINING YOUR THERMOSTAT

(Table continued on next page)

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Cooling system will not turn on

1. Not in Cool mode

• Check cool indicator arrow on display. If off, move temperature slide to the left and ensure thermostat is not in setback mode.

2. Not calling for cool

• Move system switch to Cool

3. Bad compressor contactor

• Check for voltage at compressor contactor - call service person for repair.

OPERATING YOUR THERMOSTAT

OPERATING YOUR THERMOSTAT

------

PROBLEMPOSSIBLE

CAUSE ACTION TO TAKEIN MANUAL,

REFERENCE SECTION ...

Large temperature swing

1. Thermostat location

• Relocate thermostat.

2. Differential switch set to 3°F

• Move differential switch to 1°F.

CHECK YOUR THERMOSTAT'S LOCATION

SETTING OPTION SWITCHES

On/off cycles too short

1. Thermostat location

• Relocate thermostat.

2. Differential switch set to 1°F

• Move differential switch to 3°F.

3. Miscalibrated • Thermostat is calibrated at factory at 70°F and should need no further calibration - if calibration is needed, call 800 number for assistance.

Frozen display 1. Static electricity • Push reset button.

CHECK YOUR THERMOSTAT'S LOCATION

SETTING OPTION SWITCHES

------

OPERATING YOUR THERMOSTAT

4. Blown fuse • Check wiring. Replace fuse. MAINTAINING YOUR THERMOSTAT

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8946

If you need further information on installation or programminginstructions, you may call our technical service department (8:00 AMto 4:30 PM CST) at 1-314-577-1300 or toll free at 1-800-876-TECH.


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