Page 3 - Table of Contents; Page
3 69-0887—1 Table of Contents Page Prepare for Installation .................................................................................................................... 5Remove Old Ther mostat ......................................................................................................
Page 4 - RECYCLING; not place your old thermostat; Fig. 1. Typical location of a mercury switch
4 69-0887—1 RECYCLING If this thermostat is replacing a thermo-stat that contains mercury in a sealedtube, do not place your old thermostat in the trash. See Fig. 1. Contact yourlocal waste management authority forinstructions regarding recycling and theproper disposal of your old thermostat. If you...
Page 5 - Prepare for Installation; Not compatible with any 120/240 volt circuit.
5 69-0887—1 Prepare for Installation A Check Table 1 to make sure this thermostat is compatible with your system. For moreinfor mation, call Honeywell Customer Assistance, toll-free 1-800-468-1502. Table 1. Compatibility Char t. System Type Compatible With T8131 Gas—Standing Pilot Yes Gas—Electronic...
Page 7 - Remove Old Thermostat; also
7 69-0887—1 Remove Old Thermostat A Test to make certain that your heatingand cooling systems are workingproperly. If either does not work, contactyour local heating/air conditioning dealer.To avoid compressor damage, do notoperate the cooling system when outdoortemperature is below 50 ° F (10 ° C)....
Page 8 - Three Thermostat Wires?
8 69-0887—1 Replacing a Clock Thermostat thathas C or C1 Clock Terminals? If you are replacing a Honeywell Chronotherm®Thermostat, you may find one or two wires thatgo to the C or C1 clock terminals on theChronotherm® Thermostat wiring wallplate. Donot allow them to touch, or you can damageyour tran...
Page 9 - Install Batteries; IMPORTANT; Use a coin to remove the batter y door.
9 69-0887—1 Install Batteries IMPORTANT Batteries must be installed for pro-gramming and operating the thermo-stat and heating/cooling system. A Use two AA alkaline batteries; non-alkaline batteries will not last as long,and can leak, causing damage to thethermostat or the wall surface. Werecommend ...
Page 11 - Program the Thermostat
11 69-0887—1 Program the Thermostat When batteries are installed, your thermostatcan be programmed in your hand, before it ismounted on the wall. If you would prefer to program the thermostatafter it is mounted on the wall, go to page 22,and return later to this programming section. Refer to the per...
Page 14 - Program Schedule; HEATING PROGRAM SCHEDULE; Weekdays; The temperatures cannot be set any higher than 88
14 69-0887—1 Program Schedule HEATING PROGRAM SCHEDULE Weekdays Start Time Heating Temperature WAKELEAVERETURNSLEEP WeekendsWAKESLEEP WAKE and RETURN start times should include extra lead time, based on outside temperatureand furnace response time, to give your furnace a head start to heat the house...
Page 15 - COOLING PROGRAM SCHEDULE
15 69-0887—1 COOLING PROGRAM SCHEDULE Weekdays Start Time Cooling Temperature WAKELEAVERETURNSLEEP WeekendsWAKESLEEP WAKE and RETURN start times should include extra lead time, based on outside temperatureand furnace response time, to give your furnace a head start to heat the house. The temperature...
Page 18 - Temporarily Change temperature; for current period only—press TEMPORARY
18 69-0887—1 A quick guide for operating or making changes follows: NOTE: Set system switch to Heat or Cool to perform the following: Temporarily Change temperature for current period only—press ; TEMPORARY indicator shows on display; this is cancelled at next scheduled change, or to cancel sooner, ...
Page 19 - Return to normal program or start program—press .
19 69-0887—1 Set Schedule Run Program Check Programs—press repeatedly to see each time and temperature; then press . Cancel a program—press until program to cancel shows; then press together. Permanently Change a program—Repeat steps in Heating Program or Cooling Program (page 16and 17), as applicab...
Page 20 - Adjust Fan Operation Switch; out one turn means
20 69-0887—1 Adjust Fan Operation Switch A The thermostat fan operation switch,labeled FUEL SWITCH (see illustration onpage 21), is factory-set in the F position.This is the correct setting for mostsystems. If your system is an electric heatsystem, set the switch to E. The E settingallows the fan to...
Page 22 - Mount Thermostat Mounting Plate
22 69-0887—1 Mount Thermostat Mounting Plate A Position mounting plate on the wall. Usea level to make sure mounting plate islevel. Use a pencil to mark the twomounting holes. 2 Remove mounting plate from the wall,and drill 3/16 in. holes in the wall (ifdrywall) as marked. For firmer materialsuch as...
Page 24 - Wire Thermostat Terminals
24 69-0887—1 Wire Thermostat Terminals NOTE: All wiring must comply with localcodes and ordinances. If unsureabout household wiring procedures,call your local heating/air conditioningcontractor. Refer to the masking tape labels you placed onthe wires when you removed your old thermostat. A Match the...
Page 28 - Mount Thermostat
28 69-0887—1 Mount Thermostat NOTE: To remove thethermostatfrom thewall, first pullout at thebottom ofthermostat,then removethe top. M879 B. PRESS LOWER EDGE OF CASE TO LATCH. C. SWING COVER OPEN TO CHECK OPERATION. A. ENGAGE TABS AT TOP OF THERMOSTAT AND MOUNTING PLATE.
Page 29 - Heating; Press key until setting is about 10; Cooling
29 69-0887—1 Check Thermostat Operation AfterProgramming and Installing Heating Do not check heating system operation suchas the gas valve, zone valve or oil burnercontrol by jumpering thermostat terminals atthe primar y control. This damages the thermo-stat. Instead, jumper R and W wires at thether...
Page 31 - Set Fan and System Switches; First set the fan switch.; AUTO: Normal setting for most; Then set the system switch.; OFF: Both the heating and air
31 69-0887—1 Set Fan and System Switches First set the fan switch. AUTO: Normal setting for most homes. A single-speed fan tur nson automatically with the airconditioner or furnace. A two-speed fanusually runs on high with the air conditionerand on low with the furnace. Exception: If Fan Operation S...
Page 32 - Troubleshooting Guide; You have reached the temperature setting limit.
32 69-0887—1 Troubleshooting Guide IF… THEN… Display will not come on. ■ Check that the green light emitting diode (LED)located to the left of the LCD is lit, indicating thether mostat is powered proper ly. Temperature display will not go lower ■ You have reached the temperature setting limit. than ...
Page 33 - Check for correct wiring and good connections.; Cooling will not come on.; Check that the green LED is lit.
33 69-0887—1 Heating will not come on (Cont). ■ Check the system fuse or circuit breaker andreplace or reset, if necessar y. ■ Check for correct wiring and good connections. ■ If temperature setting is higher than currenttemperature and displays HEAT, contact HoneywellCustomer Assistance at 1-800-46...
Page 34 - Allow time for the furnace to heat up and the fan to; heat is coming from the registers.
34 69-0887—1 Cooling will not come on (Cont). ■ If temperature setting is lower than currenttemperature, and displays COOL, move systemswitch from COOL to OFF for ten minutes. Afterten minutes, return switch to COOL position. If theair conditioner comes on, compressor could havereached its high limi...
Page 35 - The furnace or air conditioner; Contact your heating or air conditioner contractor.; The thermostat’s current setting; Check that the wiring hole in the wall behind the; does not match the display; wallplate was plugged with insulation to prevent; bAt Lo remains on display after; Remove batteries. Wait one hour. Install fresh; fresh batteries are installed.
35 69-0887—1 The furnace or air conditioner ■ Contact your heating or air conditioner contractor. on-time is too short or too long. If further assistance is needed, call HoneywellCustomer Assistance at 1-800-468-1502. The thermostat’s current setting ■ Check that the wiring hole in the wall behind t...
Page 36 - Toll-free Customer Assistance
36 69-0887—1 Toll-free Customer Assistance For all questions concerning this thermostat, please read and follow the instructions. If additionalassistance is needed, call Honeywell Customer Assistance toll-free at 1-800-468-1502, Monday-Friday, 7:00 a.m.-5:30 p.m. Central time. Before you call, pleas...
Page 39 - Limited One-Year Warranty
39 69-0887—1 Limited One-Year Warranty Honeywell warrants this product, excluding batter y, to be free from defects in the workmanship or materials, under nor mal use and service, for a period of one (1) y ear from the date of purchase by the consumer. If, at any time during the warranty period, the...
Page 40 - Home and Building Control
40 69-0887—1 69-0887—1 Rev. 5-96 J.S. Printed in MexicoCopyright © 1996 Honeywell Inc. All Rights Reserved Home and Building Control Honeywell Inc. 1985 Douglas Drive North Golden Valley, MN 55422 Helping You Control Your World Home and Building Control Honeywell Limited-Honeywell Limitée 155 Gordon...
