Honeywell T8112C Owner'S Manual Download Page 10 | Manualshive

Page: 10 / 20

Honeywell T8112C Owner'S Manual Download Page 10

10

69-0862—4

5.

Replace the battery door.

As batteries are running low, bATLo indicator

flashes for one to two months before batteries

run out completely. Replace batteries as soon

as possible after indicator starts flashing.

After batteries are completely dead, bAtLo

indicator disappears, leaving the display

completely blank and the heating and/or cooling

system not operating.

M5781

INSTALL TWO AA ALKALINE
BATTERIES AS SHOWN

M5782

Auto On

Fan

Cool Off Heat

System

FAN SWITCH

SYSTEM
SWITCH

TU

AM

LEAVE

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Summary of Contents for T8112C

Page 1: ... U S Registered Trademark 2004 Honeywell International Inc All Rights Reserved 69 0862 4 Electronic Programmable Thermostat Owner s Manual ...

Page 2: ...dule 5 Set Current Time Day 6 Heating Program 6 Cooling Program 7 Operating Your Thermostat 7 Using Programming Features 7 Setting Fan Switch 8 Setting System Switch 9 Maintaining Your Thermostat 9 Installing Batteries 9 Troubleshooting Guide 12 Limited One Year Warranty 17 ...

Page 3: ...e time the thermostat turns on the heating cooling equipment after an energy saving period When deciding what time to set for your WAKE period include extra lead time depending on the outside temperature and your furnace response time to give the furnace a head start to heat the house before you get up This will be a higher tem perature during heating season and a lower temperature during cooling ...

Page 4: ...and temperatures you desire for weekdays and weekends If you decide not to program the thermostat it automatically controls heating at 68 F 20 C and cooling at 78 F 20 C 24 hours a day Also you do not need to enter a time and temperature program for all periods if your schedule does not require it For example a house that is occupied during weekdays would only require programs for WAKE and SLEEP W...

Page 5: ... lead time based on outside temperature and furnace response time to give your furnace a head start to heat the house b The temperatures cannot be set higher than 88 F 26 C or lower than 45 F 7 C Weekdays Start Time Heating Temperatureb Cooling Temperatureb WAKE a LEAVE RETURNa SLEEP Weekends WAKE a SLEEP ...

Page 6: ...ide using a coin at the bottom See Maintaining Your Ther mostat section Set Current Time Day To set time press and release Set Clock Day key once Press Time keys until current time shows To set the day press and release the Set Clock Day key again Press Time keys until current day shows Press Run Program key Heating Program With the System switch set to Heat press and release the Set Schedule key ...

Page 7: ... Press and release Run Program key to start the program Operating Your Thermostat Using Programming Features Temporarily Change temperature for current period only Press Temp keys to set desired temperature The change cancels itself at the next scheduled program change to cancel sooner press Run Program key M8473 Auto On Fan Cool Off Heat System TU AM LEAVE USE TO SET CURRENT DAY AND TIME USE TO S...

Page 8: ...et Schedule key until the program to cancel shows Pressing the two Time keys together cancels the program Permanently Change a program Repeat the steps in the Heating Program or Cooling Program sections as applicable Return to the normal program or the starting program Press Run Program key once Setting Fan Switch Fan switching positions are Auto Normal setting for most homes A single speed fan tu...

Page 9: ...st be installed for pro gramming and operation of the ther mostat and heating cooling system 1 Purchase two AA alkaline batteries non alkaline batteries do not last as long and can leak causing damage to the thermo stat or wall surface 2 Make sure the thermostat is set in the Off position 3 Use a coin to remove the battery door 4 Install the fresh batteries making sure the positive and negative te...

Page 10: ...ly Replace batteries as soon as possible after indicator starts flashing After batteries are completely dead bAtLo indicator disappears leaving the display completely blank and the heating and or cooling system not operating M5781 INSTALL TWO AA ALKALINE BATTERIES AS SHOWN M5782 Auto On Fan Cool Off Heat System FAN SWITCH SYSTEM SWITCH TU AM LEAVE ...

Page 11: ... are installed within 20 to 30 seconds of removing the old ones the thermostat does not have to be reprogrammed If the display is blank the batteries are dead or incorrectly installed and the thermostat has to be reprogrammed See Programming Your Thermostat section for instructions ...

Page 12: ...ntly clean battery contacts using a soft pencil eraser Do not use anything abrasive on the clips Temperature display does not go lower than 45 F 7 C or higher than 88 F 31 C during programming The temperature setting limit is reached The setting range is 45 to 88 F 7 to 31 C Temperature change occurs at the wrong times Check program times for the period in question Be sure that AM and PM indicatio...

Page 13: ...ank or displays bAtLo install fresh batteries If temperature setting is higher than current temperature and System On indicator is lit contact your local dealer Cooling does not come on Check that System switch on thermostat is set to Cool Allow a minimum of five minutes for time guard protection to expire Check the system fuse or circuit breaker and replace or reset if necessary If display is bla...

Page 14: ...current temperature and System On indicator is lit move System switch from Cool to Off for ten minutes After ten minutes return switch to the Cool position If the air conditioner comes on the compressor could have reached its high limit temperature protection and shut down If air conditioner does not come on after ten minutes and the System On indicator is lit contact your local dealer If two or f...

Page 15: ...emperature setting does not match the display temperature to within 1 Check that the wiring hole in the wall behind the wallplate was plugged with insulation to prevent drafts that could adversely affect thermostat operation Be aware that it is normal for the current setting and display temperature to differ occasionally During recovery from setback or setup setting and display temperature can dif...

Page 16: ...s a Class B digital apparatus which complies with Canadian Radio Interference Regulations CRC c 1374 bAtLo remains on display after fresh batteries are installed Remove the batteries Wait one hour Install fresh alkaline batteries If Then ...

Page 17: ...ell s option within a reasonable period of time If the product is defective i return it with a bill of sale or other dated proof of purchase to the dealer or contractor where you purchased it or ii package it carefully along with proof of purchase including date of purchase and a short description of the malfunction and mail it postage prepaid to the following address In the U S Honeywell Return G...

Page 18: ... THIS PRODUCT Some states do not allow the exclusion or limitation of incidental or consequential damages so this limitation may not apply to you THIS WARRANTY IS THE ONLY EXPRESS WARRANTY HONEYWELL MAKES ON THIS PRODUCT THE DURATION OF ANY IMPLIED WARRANTIES INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE IS HEREBY LIMITED TO THE TWO YEAR DURATION OF THIS WARRANTY...

Page 19: ...19 69 0862 4 ...

Page 20: ...0 04 www honeywell com yourhome Automation and Control Solutions Honeywell International Inc Honeywell Limited Honeywell Limitée 1985 Douglas Drive North 35 Dynamic Drive Golden Valley MN 55422 Scarborough Ontario M1V 4Z9 ...

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