OPERATION GUIDE

5 Day/2 Day Electronic DigitalThermostat (for Heat Only Systems)

1F90-60

Operator: Save this booklet for future use!

WHITE-RODGERS

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About Your New Thermostat . . .

Your new White-Rodgers Digital Thermostat uses the technology of a solid-state microcomputerto provide precise time/temperature control. This thermostat offers you the flexibility to designheating and cooling programs that fit your needs.

Please read this manual thoroughly before operating or programming your thermostat. If you havequestions, write to us at the address shown on the back cover of this manual.

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PROGRAMMING YOURTHERMOSTAT .................................... 15PLANNING FOR YOUR NEEDSENTERING YOUR PROGRAM

Set Current Time and DayEnter Heating Program

CHECK YOUR PROGRAMMINGQUESTIONS AND ANSWERS ................. 23

YOUR NEW THERMOSTAT'SFEATURES ............................................ 4

OPERATING YOUR THERMOSTAT ......... 5PARTS OF THE THERMOSTAT

The Back Of the Thermostat BodyThe DisplayThe Thermostat Buttons

OPERATING FEATURES

In This Guide . . .

Operator: Save thisbooklet for future use!

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• Separate 5-day (weekday) and 2-day (week-end) setback programming

• Four separate time/temperature settings per24-hour period

• Computed Energy Management Recovery(EMR)

• Armchair programming capability• Backlit LCD displays continuous set point,

time, and room temperature• 1.5 volt "AA" Energizer® alkaline battery

backup

YOUR NEW THERMOSTAT’S FEATURES

• Preprogrammed temperature control• Adjustable cycle times• Audio and visual prompting during operation• Two hour temperature override• Manual program override (HOLD tempera-

ture)• "Advance Program" key• °F/°C convertibility• Temperature range 40° to 99°F

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OPERATING YOUR THERMOSTAT

Before you begin programming your thermo-stat, you should be familiar with its features andwith the display and the location and operationof the thermostat buttons. The information inthis section will help you become familiar withyour new thermostat so that you can easilyprogram it.

Your thermostat consists of two parts: thethermostat body and the subbase .

Remove power from the system at thecircuit breaker/fuse box before remov-ing or attaching the thermostat body.Equipment damage and/or personal in-jury could occur.

The subbase is attached to the wall, but you canremove the thermostat body for easy program-ming. To remove the thermostat body from thesubbase, grasp the thermostat body and gentlypull it straight out from the subbase. To attachthe thermostat body, line up the six terminal pinson the upper section of the thermostat back withthe matching connector on the subbase. Insertthese, then gently pivot the thermostat bodydown to connect the snap connectors on thelower portion of the thermostat back. Gentlypush until the snap connectors engage. DONOT FORCE OR PRY THE THERMOSTAT, asthis may damage the unit.

CAUTION!

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PARTS OF THE THERMOSTAT

The Back of The Thermostat Body

Turn the thermostat body over. On the back arethe 3 "AA" Energizer® alkaline batteries.

The "AA" Energizer® alkaline batteries providepower to the thermostat when the 24vAC poweris interrupted (for example, when you removethe thermostat from the wall for programming).Fresh batteries will maintain the stored programfor approximately a year. If power loss is longenough for the program to be lost, the thermo-stat will automatically return to the factory pro-grammed heating temperature of 64°F whenpower is restored. You must reprogram thethermostat if this happens.

If the word BATTERY is flashing in the displaywindow, the batteries are low and should bereplaced with fresh "AA" Energizer® alkalinebatteries.

Before removing thermostat from thewall to replace the batteries, remove24vAC power from the thermostat at thebreaker/fuse box.

CAUTION!

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Other than and , the buttons arelocated behind the thermostat door. To open thedoor, put your fingernail in the indentation at thetop of the door, then pull the door out from the topand swing it down on its hinges.

On the following pages there are brief descrip-tions of the display and the thermostat buttons.

BACK OF THERMOSTAT BODY

6-pin Connector Batteries

S3

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1

2

3

4

5The Display

Continuously displays system mode (HEAT,OFF, HOLD). During programming, theprogram period is displayed (MOR, DAY,EVE, or NHT).

Alternately displays room temperature (Fdenotes degrees Fahrenheit and C denotesdegrees Celsius) and time of day (A de-notes AM time and P denotes PM time).

Displays the setpoint temperature.

5 DAY indicates that the displayed programis the weekday program. 2 DAY indicatesthat the displayed program is the weekendprogram.

The word BATTERY flashes on the displaywhen the "AA" alkaline batteries are weakand should be replaced. The word BAT-TERY is displayed continuously (non-flash-ing) when thermostat is running on batterypower only.

On millivolt systems, the thermostat oper-ates on battery power and the word BAT-TERY will always be displayed continuously.If you have a millivolt system, you shouldchange your batteries at least once a year toensure optimum thermostat operation.

NOTE

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SYSTEMSWITCH

HEAT-OFF

TIMEFWD

TIMEBACK

SETCLOCK

SETDAY

VIEWPRGM

RUNPRGM

HOLDTEMP

ADVPRGM

1 2 3

4

2 DAY 5 DAY

2

3

4

5 DAY

5

BATTERY

WHITE-RODGERS DIGITAL COMFORT SET II

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The Thermostat Buttons

Sets the system mode (HEATing or OFF).

Runs display forward or backward throughtime, day, or anticipation settings duringprogramming.

Used with TIMEFWD and TIME

BACK to set current time.

Used with TIMEFWD and TIME

BACK to set the current

day of the week. Also used in conjunction

with the SETCLOCK button to enter anticipation

setting mode.

Used to initiate or review thermostat pro-gramming.

Used to start program operation after pro-gramming. Also used to return thermostatto program operation after being in HOLDmode.

Used to manually override programming tohold at a selected temperature (when HOLDis displayed).

Used to advance thermostat program to thenext program period (for example, from theMOR program to the DAY program).

(Red arrow) Raises temperature setting(99°F or 37°C maximum).

(Blue arrow) Lowers temperature setting(40°F or 4°C minimum).

The red indicator light glows whenever heat-ing system is operating.

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14

13

12

11

10

9

8

7

6

11

SYSTEMSWITCH

TIMEFWD

TIMEBACK

SETCLOCK

SETDAY

VIEWPRGM

RUNPRGM

HOLDTEMP

ADVPRGM

8 9 10 11 12 13

1415 16

7

6

HEAT-OFF

5 DAY

WHITE-RODGERS DIGITAL COMFORT SET II

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OPERATING FEATURES

Now that you are familiar with the thermostatdisplay and buttons, read the following informa-tion to learn about the many features of thethermostat.

• COMPUTED ENERGY MANAGEMENTRECOVERY (EMR) — The thermostat’smicrocomputer can be set to automaticallycalculate the time it will take to change thetemperature to the next program setting.Then the thermostat will activate the heat-ing system to change the temperature sothat the desired temperature is reached atthe beginning of the next program period.As an example of this feature, assume thatyou have programmed your thermostat toprovide an overnight heating temperature of

62°F, and that during the next programperiod, beginning at 6:00 AM, you haveprogrammed a temperature of 70°F. Thethermostat will automatically activate theheating system at about 5:00 AM, so thatthe programmed 70°F temperature isreached by about 6:00 AM.The thermostat is configured at the factoryso that this feature is disabled. If you wishto have this feature, refer to the installationinstructions for this thermostat, or contactyour local heating/cooling contractor.

• TWO HOUR TEMPERATURE OVER-RIDE — Press or until thedisplay shows the temperature you want.The thermostat will override current pro-gramming and keep the room temperatureat the selected temperature for two hours.After two hours, the thermostat will auto-matically revert to the program.

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• HOLD TEMPERATURE — The thermostatcan hold any temperature within its rangefor an indefinite period, without reverting to

the program. Press HOLDTEMP . HOLD will be

displayed. Then choose the desired holdtemperature by pressing or .The thermostat will hold the room tempera-ture at the selected setting until you press

RUNPRGM to start program operation again. This

feature is ideal for energy conservation whenthe building is unoccupied for an extendedperiod of time.

• "ADVANCE PROGRAM" KEY — PressADV

PRGM to change the thermostat to the next

program period. This will temporarily over-ride the program, until the next programperiod begins (for example, pressing this

key while in the DAY program will advancethe thermostat to the EVE program, whichwill remain in effect until the NHT programbegins).

• °F/°C CONVERTIBILITY — Press TIMEFWD and

TIMEBACK at the same time until the temperature

display is in °C (Celsius). To display °F,repeat the process.

• ADJUSTABLE HEATING CYCLE TIMES(ANTICIPATION) — If the heating systemis turning on and off too often (short cycles)or not often enough (long cycles), you maywant to adjust the anticipation setting.

To adjust heat anticipation, press SETCLOCK and

SETDAY at the same time. The display will show

HEAT 5 (this is the factory preprogrammed

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heating anticipation setting). You may se-lect any anticipation setting from 2 to 40(note that for hydronic systems, a mini-mum anticipation setting of 15 is recom-mended ). Whenever adjusting anticipa-tion, increase or decrease the displayednumber by only one or two digits, then let thesystem run for a while to see if the adjust-ment is sufficient. If the heat cycles are too

short, press TIMEFWD to increase the cycle time.

If the heat cycles are too long, press TIMEBACK to

decrease the cycle time. Press RUNPRGM to

return to your program.• LOW BATTERY INDICATOR — The word

BATTERY will flash on the display if the"AA" alkaline batteries are low and should

be replaced. The word BATTERY will bedisplayed continuously (non-flashing) when24v AC power is not being supplied to thethermostat and the thermostat is operatingon battery power only. On millivolt systems,the word BATTERY will be displayed con-tinuously (see PARTS OF THE THERMO-STAT).

• AUDIO PROMPTING — Each time youpress a button, the thermostat will beep.

• BACKLIT DISPLAY — When you pressany button on the thermostat, the display islit for approximately eight seconds.

• SYSTEM INDICATOR LIGHT — The redlight on the upper right part of the thermostatindicates system operation (see PARTS OFTHE THERMOSTAT).

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Now you are ready to program your thermostat.This section will help you plan your thermostat'sprogram to meet your needs.

For maximum comfort and efficiency, keep thefollowing in mind when planning your program.

• When heating your building, program thetemperatures to be cooler when the buildingis vacant or during periods of low activity.

PLANNING FOR YOUR NEEDS

First, answer the following questions to help youdecide what your needs are. If you are using thethermostat for a commercial application (a store,

office building, etc.), answer questions 1 through4. If you are using the thermostat in your home,answer questions 5 through 8.

FOR COMMERCIAL APPLICATIONS:1a. What time does the first person arrive at the

building in the morning?b. What temperature should the building be at

this time? This will be your MOR (morning)temperature setting.

2a. What time do the building occupants reacha maximum activity level (using lights, equip-ment, meeting rooms, etc.)?

b. What temperature should the building be atthis time? This will be your DAY tempera-ture setting.

PROGRAMMING YOUR THERMOSTAT

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3a. What time do the building occupants reacha minimum activity level (limited personnelin building)?

b. What temperature should the building be atthis time? This will be your EVE (evening)temperature setting.

4a. What time does the building become va-cant?

b. What temperature should the building be atthis time? This will be your NHT (night)temperature setting.

IN YOUR HOME:5a. What time does the first person get up in the

morning?b. What temperature should the house be at

this time? This will be your MOR (morning)temperature setting.

6a. What time does the last person leave thehouse in the morning?

b. What temperature should the house be atthis time? This will be your DAY tempera-ture setting.

7a. What time does the first person arrive homein the evening?

b. What temperature should the house be atthis time? This will be your EVE (evening)temperature setting.

8a. What time does the last person go to bed atnight?

b. What temperature should the house be atthis time? This will be your NHT (night)temperature setting.

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Now look at the factory preprogrammed timesand temperatures shown at the right. If this

program will suit your needs, simply press RUNPRGM

to begin running the factory preset program.

If you want to change the preprogrammed timesand temperatures, do the following.

Determine the time periods and heating tem-peratures for your weekday program. You mustprogram 4 periods for each day (MOR, DAY,EVE, and NHT). However, you may use thesame heating temperatures for consecutive timeperiods. You can choose start times and heat-ing temperatures independently for both week-day and weekend programs. Use the table on

the following page to plan your program timeperiods, and the temperatures you want duringeach period. You may also want to look at thesample program table to get an idea of how thethermostat can be programmed.

Factory PreprogrammedHeating Program for ALL days of the Week:

PERIOD TIME TEMPMORDAYEVENHT

5:00 AM9:00 AM4:00 PM10:00 PM

70707064

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WEEKDAY (5 DAY) WEEKEND (2 DAY)

StartTime Temperature

StartTime Temperature

MOR HEAT

DAY HEAT

EVE HEAT

NHT HEAT

Heating Schedule Plan

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WEEKDAY (5 DAY) WEEKEND (2 DAY)

StartTime Temperature

StartTime Temperature

MOR HEAT

DAY HEAT

EVE HEAT

NHT HEAT

SAMPLEHeating Schedule Plan

5:30 AM

8:00 AM

5:00 PM

10:30 PM

7:00 AM

11:00 AM

6:00 PM

11:30 PM

68°F

70°F

70°F

65°F

68°F

65°F

70°F

65°F

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ENTERING YOUR PROGRAM

Follow these steps to enter the heating programyou have selected.

We recommend that you remove the thermostatfrom the wall for programming. Fresh "AA"Energizer® alkaline batteries must be installedto perform off-wall programming. BE SURESYSTEM SWITCH IS SET TO OFF POSITIONBEFORE REATTACHING THERMOSTAT TOSUBBASE!

Set Current Time and Day

1. Press SETCLOCK once. The display will show

minutes only.

EXAMPLE:

2. Press and hold either TIMEFWD or TIME

BACK until you

reach the correct minutes.

3. Press SETCLOCK once. The display window will

show the hour only.

EXAMPLE:

4. Press and hold either TIMEFWD or TIME

BACK until you

reach the correct hour and AM/PM designation(AM begins at midnight; PM begins at noon).

5. Press SETDAY once. The display will show the

day of the week as an abbreviation (MO forMonday, TU for Tuesday, etc.).

6. Press and hold either TIMEFWD or TIME

BACK until you

reach the current day of the week.

NOTE

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7. Press RUNPRGM once. The display will show the

correct time and room temperature alternately.

Enter Heating Program

During programming, if you don’t press anybuttons for 5 minutes, the thermostat will enterthe HOLD mode and will maintain a constanttemperature. The display will revert to thealternating time/temperature display. To re-sume programming after this happens, press

VIEWPRGM until you are at the point where you stopped

programming. Then you may continue to enteryour programs normally. If you want to stop

programming at any time, simply press RUNPRGM to

resume program operation.

1. Press SYSTEMSWITCH until HEAT is displayed.

2. Press VIEWPRGM once. 5 DAY (indicating week-

day program), and MOR, representing themorning heating period, will appear in thedisplay. Also displayed are the currentlyprogrammed start time for the MOR periodand the currently programmed temperature.

EXAMPLE: 5 DAY

This display window shows that for theweekday MOR period, the start time is 5:00AM, and 70° is the programmed tempera-ture (this example reflects factory prepro-gramming).

3. To change the displayed start time to yourselected start time for weekday MOR heat

program, press TIMEFWD or TIME

BACK until your se-

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lected time appears. The time will change in15 minute increments.

4. Press or MOR heating tempera-ture.

5. Press VIEWPRGM . The currently programmed

start time and heating temperature for week-day DAY will be displayed.

6. Repeat steps 3 and 4 to select the start timeand heating temperature for the weekdayDAY program.

7. Repeat steps 3 through 6 for the weekdayEVE and NHT heating programs.

8. After entering your weekday heating pro-gram, repeat steps 1 through 7 for yourweekend programming (keep in mind thatfor weekend programming, the displayshould be changed from 5 DAY to 2 DAY).

10. When you have completed entering your

heating program, press RUNPRGM .

CHECK YOUR PROGRAMMING

Follow these steps to check your thermostatprogramming one final time before beginningthermostat operation. You may change yourprogramming at any time while checking pro-gramming.

1. Press SYSTEMSWITCH until HEAT is displayed.

2. Press and hold VIEWPRGM to view the heating

period times and temperatures in sequencefor weekday, then weekend MOR, DAY,EVE, and NHT program periods.

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3. Press RUNPRGM to begin program operation.

YOUR THERMOSTAT IS NOW COMPLETELYPROGRAMMED AND READY TO AUTOMATI-CALLY PROVIDE MAXIMUM COMFORT ANDEFFICIENCY!

Press SYSTEMSWITCH until OFF is displayed. Reattach

thermostat to subbase. Turn on power to the

system. Then press SYSTEMSWITCH to select the

operation mode you want (HEAT or OFF)

1. How can I permanently change a part ofmy program?

Press VIEWPRGM until you reach the time/tem-

perature schedule you want. Then pressTIMEFWD or TIME

BACK and and to change

the program. See PROGRAMMING YOURTHERMOSTAT.

2. How can I have no change in tempera-ture from one time period to another?Simply select the same temperature foreach consecutive time period. For example,you may select the same weekday EVEheating temperature as you did for weekdayDAY, which means the temperature will notchange when the EVE period begins. SeePROGRAMMING YOUR THERMOSTAT .

QUESTIONS AND ANSWERS

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3. How can I finish my programming if thedisplay has already changed to time/temperature?During programming, if no buttons arepressed for five minutes, the thermostat willenter the HOLD mode and maintain a con-stant temperature. The display will changeto the time/temperature mode. To resume

programming, press VIEWPRGM until you return to

the point where you stopped programming.Then you may continue to program thethermostat normally. If you want to stop

programming at this point, press RUNPRGM to

start the normal program function. SeePROGRAMMING YOUR THERMOSTAT .

4. What happens if the electricity goes offor is manually shut off?If you have not installed 3 "AA" alkalinebatteries, the display will go blank and theprogram will be lost in approximately oneminute. When electricity is restored, theclock will reset itself to 12:00 PM (noon) andthe thermostat will maintain a heating tem-perature of 64°F and a cooling temperatureof 82°F until you reenter your program.Setpoint temperature will not be displayed.

If fresh "AA" Energizer® alkaline batteriesare installed, the program will be main-tained for about one year with no 24vACpower present to the thermostat. See OP-ERATING YOUR THERMOSTAT .

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5. What can cause the thermostat displayto freeze or go blank?A completely blank display may indicatethat power has been lost to the thermostatand the backup battery is also dead. How-ever, if there is power to the thermostat andthe display is blank or frozen, static dis-charge is probably the cause.

During periods of low humidity (especiallyduring cold weather), you may feel or see aspark discharge when you touch the ther-mostat. This may cause the program to belost or the thermostat to display incorrectly.To correct this, remove the thermostat fromthe wall and disconnect the battery. Waitabout one minute, then reconnect the bat-tery. The thermostat will revert to the factorypreset program until you reprogram thethermostat. If you don’t want to reprogram

the thermostat immediately, press SYSTEMSWITCH

until OFF is displayed and replace the ther-

mostat on the wall. Then press RUNPRGM to

begin the factory preset program. Or youmay reprogram the thermostat, then re-place it on the wall.

To prevent further static discharge prob-lems, touch another object to release staticbuild-up before touching the thermostat.See OPERATING YOUR THERMOSTAT .

6. The display is flashing BATTERY. Whatdoes this mean?The "AA" batteries installed in the thermo-stat are low and should be replaced withfresh "AA" Energizer® alkaline batteries. SeeOPERATING YOUR THERMOSTAT .

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7. The display shows a continuous (non-flashing) BATTERY. What does thismean?The thermostat is not being supplied with24vAC power. The thermostat is operatingon battery power alone. See OPERATINGYOUR THERMOSTAT.

8. Why doesn’t the temperature change atthe time I programmed?There may be a number of causes for thissituation. The following are primary reasons.

• The thermostat has been configured toenable the EMR function. The EMRfunction will automatically bring on thesystem automatically to bring the tem-perature to the selected level by thebeginning of the next program period.See OPERATING YOUR THERMO-STAT.

• You have programmed the incorrect dayor time. Check your programming (besure that the times you programmed arecorrect AM or PM times). See PRO-GRAMMING YOUR THERMOSTAT .

• The thermostat is in the HOLD mode.

Press RUNPRGM to start program operation.

See OPERATING YOUR THERMO-STAT.

9. Why is the system turning on and off sofrequently (seldom)?The anticipation setting is too low (high). Tochange anticipation settings, see OPER-ATING YOUR THERMOSTAT .

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10. During warmer weather I want to turn myheating system off. Can I do this withoutaffecting my thermostat programming?Any time you wish to turn your system off,

simply press SYSTEMSWITCH until the display shows

OFF. This will not affect your thermostat’sprogramming in any way. To turn the sys-

tem back on, press SYSTEMSWITCH until HEAT is

displayed. The system will automaticallybegin operating according to the currentthermostat program, unless the thermostatis in the HOLD mode. See OPERATINGYOUR THERMOSTAT.

11. I live in an area where daylight savingstime is observed. How do I change thethermostat clock twice a year withoutaffecting thermostat programming?To change your clock, follow the instruc-tions for setting current time and day. SeeENTERING YOUR PROGRAM. Thermo-stat programming is not affected when youchange the clock.

12. Do I have to reprogram my thermostatafter I change the batteries?When the thermostat is on the wall and thesystem has power, the thermostat is beingpowered by a 24v AC source. If power islost, or if the thermostat is removed from thewall, the program will be retained for ap-proximately one minute if there are nobatteries installed or if the installed batteries

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are dead. If you are changing the batteriesafter seeing a flashing BATTERY on thedisplay, the installed batteries may be dead.If you remove the old batteries and installfresh ones within one minute, you shouldnot lose your thermostat programming. Af-ter installing new batteries, follow the proce-dures in CHECK YOUR PROGRAMMINGto determine whether your programmingwas maintained. If the thermostat main-

tains programming, press SYSTEMSWITCH until OFF

is displayed, put the thermostat back on the

wall, press SYSTEMSWITCH to select the operating

mode you want, then press RUNPRGM to start

program operation. If the program is lost,reprogram the thermostat. See PROGRAM-MING YOUR THERMOSTAT.

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NOTES

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NOTES

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WARRANTY INFORMATION

THIS WARRANTY STATEMENT SUPERSEDES ALL WARRANTYSTATEMENTS DATED PRIOR TO MARCH 1, 1988.

White-Rodgers Division of Emerson Electric Co. (“Seller”) warrants that itsproducts purchased for resale (the “Products”) will be free from defects inmaterial and workmanship under normal use and service for a period of twelve(12) months from date of installation. Seller’s obligation under this warranty, andPurchaser’s exclusive remedy for the breach thereof, shall be limited to, atSeller’s option, Seller’s replacement of any defective Product F.O.B. Seller’sfactory, or Seller’s issuance of a credit in the amount of the purchase price ofsuch Product for resale as described below. Seller shall have the option ofrequiring the return of any defective Product, transportation charges prepaid,before recognizing any claim. This warranty shall not apply to any Product (1)which has been repaired or altered outside Seller’s factory or by other than Sellerin any manner so as, in Seller’s judgement, to affect its serviceability or properoperation; (2) which has been subjected by persons other than Seller to improperhandling, operation, maintenance, repair or alteration; or (3) which has beensubjected to misuse, negligence, or accident.

This warranty extends only to persons or organizations who purchase theProducts for resale. THE FOREGOING CONSTITUTES SELLER’S SOLERESPONSIBILITY UNDER THIS WARRANTY, AND PURCHASER’SEXCLUSIVE REMEDY FOR BREACH THEREOF. EXCEPT AS OTHERWISEEXPRESSLY SET FORTH IN THIS AGREEMENT, THERE ARE NO OTHERWARRANTIES, EXPRESS OR IMPLIED, WHETHER OF MERCHANTABILITY,FITNESS FOR A PARTICULAR PURPOSE, OR OTHERWISE. SELLERSHALL NOT BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL ORCONSEQUENTIAL DAMAGES IN CONNECTION WITH THE SALE, RESALEOR USE OF THE PRODUCTS.

Complete warranty information and instructions for replacing/returning warrantyproducts can be found in the White-Rodgers Product Catalog, or by telephoningor writing to:

White-Rodgers DivisionEmerson Electric Co.9797 Reavis RoadSt. Louis, Missouri 63123-5329(314) 577-1300

WARRANTY INFORMATION FOR CONSUMERSWhen you purchase a White-Rodgers Division product, it is typically forreplacement of a device which has failed on existing residential or commercialequipment, or a component of new equipment purchased for modernization.

While our warranty does not extend to you, your contractor or dealer is protectedby a one-year product warranty from White-Rodgers. Your supplier can rely ona nearby White-Rodgers wholesaler for prompt credit or replacement.

Part No. 37-5110A

9151

If you need further information on programming or operation, write to:

White-Rodgers Division, Emerson Electric Co.9797 Reavis RoadSt. Louis, MO 63123-5329Attn: Technical Service Department

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