T8131A,B Programmable Thermostat OWNER’S GUIDE Weekday/Weekend (5-day/ 2-day) Programmable Heat and/or Cool Low Voltage (20 to 30 Vac) Thermostat and Mounting Plate 1 69-0887—1 69-0887-1
Direct any questions concerning the application of this thermostat to Honeywell Customer Assistance at 1-800-468-1502, Monday-Friday 7:00 a.m.-5:30 p.m., Central time. Welcome to the world of comfort and energy savings with your new Honeywell programmable thermostat. By following the programing instructions in this manual, your new thermostat will automatically control the temperature in your home, keeping you comfortable while saving energy.
Table of Contents Page Prepare for Installation .................................................................................................................... 5 Remove Old Thermostat ................................................................................................................. 7 Replacing a Clock Thermostat that has C or C1 Clock Terminals .................................................. 8 Install Batteries ..........................................................................
RECYCLING MERCURY SWITCH If this thermostat is replacing a thermostat that contains mercury in a sealed tube, do not place your old thermostat in the trash. See Fig. 1. Contact your local waste management authority for instructions regarding recycling and the proper disposal of your old thermostat. M3701 Fig. 1. Typical location of a mercury switch in a thermostat. If you have questions, call Honeywell Inc. at 1-800-468-1502.
Prepare for Installation A Check Table 1 to make sure this thermostat is compatible with your system. For more information, call Honeywell Customer Assistance, toll-free 1-800-468-1502. Table 1. Compatibility Chart.
2 Acquire tools and items (below) as needed. Also purchase two AA alkaline batteries; we recommend Energizer® batteries.
5 Loosen screws holding thermostat to subbase, wallplate or wall, and lift away. 6 Disconnect wires from old thermostat or subbase. As you disconnect each wire, use masking tape to label it with the old terminal designation. If there are only two wires, they do not require labeling. If there is an extra wire that is not connected to your old thermostat, you also will not be connecting it to your new thermostat. Keep the wires from falling back into the wall by wrapping them around a pencil as shown.
Replacing a Clock Thermostat that has C or C1 Clock Terminals? have a variation of a heat pump or multistage system. This thermostat is not compatible with such systems. If you would like information about which programmable thermostats will work with your system, call Honeywell Customer Assistance at 1-800-468-1502. If you are replacing a Honeywell Chronotherm® Thermostat, you may find one or two wires that go to the C or C1 clock terminals on the Chronotherm® Thermostat wiring wallplate.
Install Batteries IMPORTANT Batteries must be installed for programming and operating the thermostat and heating/cooling system. REMOVING BATTERY DOOR A Use two AA alkaline batteries; nonalkaline batteries will not last as long, and can leak, causing damage to the thermostat or the wall surface. We recommend Energizer® batteries. 2 Make sure the thermostat is set to the OFF position. 3 Use a coin to remove the battery door.
indicator eventually stops flashing. bAt Lo stays on without flashing to indicate the thermostat and heating/cooling system have stopped working and the batteries are almost completely dead. IMPORTANT Although the thermostat has a low battery indicator, replace the batteries once a year to prevent the thermostat and heating/cooling system from shutting down due to lack of battery power. After the batteries are completely dead, the bAt Lo indicator disappears, leaving a completely blank display.
time periods are available. These periods can be seen individually on the display as you press the Set Schedule key. Program the Thermostat When batteries are installed, your thermostat can be programmed in your hand, before it is mounted on the wall. WAKE is the time period you want the house at a comfortable temperature when you get up and while you get ready for work or school.
sleeping. (Again, lower for heating or higher for cooling. For more comfortable sleeping, some homeowners choose not to raise the cool temperature during the night.) at work or school. (This will be a lower temperature during heating season, or a higher temperature during cooling season.) RETURN is the time period you want the house at a comfortable temperature for activities before bedtime.
it. For example, a house that is occupied during weekdays would only require programs for WAKE and SLEEP. NOTE: Using sharp fingernails or pencil points can damage the keypad. If you make an error at any time during programming, press the Run Program key and continue again at the last step. Before programming, remove the clear plastic overlay covering the display. When pressing the keys, use the ball of your finger or a soft pencil eraser.
Program Schedule HEATING PROGRAM SCHEDULE Weekdays WAKE 1 LEAVE RETURN 1 SLEEP Heating Temperature 2 Start Time Weekends WAKE 1 SLEEP WAKE and RETURN start times should include extra lead time, based on outside temperature and furnace response time, to give your furnace a head start to heat the house. 2 The temperatures cannot be set any higher than 88°F (31°C) or any lower than 45°F (7°C).
COOLING PROGRAM SCHEDULE Weekdays WAKE 1 LEAVE RETURN 1 SLEEP Start Time Cooling Temperature 2 Weekends WAKE 1 SLEEP 1 WAKE and RETURN start times should include extra lead time, based on outside temperature and furnace response time, to give your furnace a head start to heat the house. 2 The temperatures cannot be set any higher than 88°F (31°C) or any lower than 45°F (7°C).
This guide can be used for programming your new thermostat. NOTE: Batteries are required for operation and programming. When inserting batteries, set the system switch to OFF. Remove the battery door (on the thermostat left side) using a coin at the bottom. Follow the instructions on pages 9 and 10.
Time Temp Ahead Warmer Use to program WAKE time and Back to program WAKE temperature for Mon-Fri. Cooler Repeat sequence for LEAVE, RETURN, and SLEEP. Press Set Schedule Time Ahead until SAT, SUN, WAKE and SET appear on the display. Use to program Back Temp Warmer WAKE time and to program WAKE temperature for SAT-SUN. Repeat sequence for SLEEP. Cooler Cooling Program With system switch at COOL, follow the same instructions as for the Heating Program.
A quick guide for operating or making changes follows: NOTE: Set system switch to Heat or Cool to perform the following: Temp Warmer Temporarily Change temperature for current period only—press ; TEMPORARY Cooler indicator shows on display; this is cancelled at next scheduled change, or to cancel sooner, press Run Program Temp .
Check Programs—press Set Schedule repeatedly to see each time and temperature; then press Run Program . Time Ahead Cancel a program—press Set Schedule until program to cancel shows; then press together. Back Permanently Change a program—Repeat steps in Heating Program or Cooling Program (page 16 and 17), as applicable. Return to normal program or start program—press 19 Run Program . Questions? Call Honeywell Customer Assistance 1-800-468-1502.
setting screws A and B on the back of the thermostat. Use the heating system table shown in the illustration (page 21) as a guide. Adjust Fan Operation Switch A The thermostat fan operation switch, labeled FUEL SWITCH (see illustration on page 21), is factory-set in the F position. This is the correct setting for most systems. If your system is an electric heat system, set the switch to E.
• Electric Furnace—leave at the Warm Air Furnace setting (A— leave in, B—out one turn). NOTE: This thermostat does not have a setting for steam/ gravity air. Cycles would not be long enough for accurate temperature control.
Mount Thermostat Mounting Plate WALL ANCHORS (2) WIRES THROUGH WALL OPENING A Position mounting plate on the wall. Use a level to make sure mounting plate is level. Use a pencil to mark the two mounting holes. 2 Remove mounting plate from the wall, and drill 3/16 in. holes in the wall (if drywall) as marked. For firmer material such as plaster or wood, drill 7/32 in. holes. Gently tap the anchors (provided) into the drilled holes until flush with the wall.
3 Reposition the mounting plate over the holes, pulling the wires through the wiring opening. Loosely insert the two mounting screws into the holes. 4 Level for appearance only; thermostat functions properly even when not level. Tighten the mounting screws.
If the wires are still too short, use the wire connectors (purchased locally) to extend the wires. See figure for guidelines on using wire extenders. Wire Thermostat Terminals NOTE: All wiring must comply with local codes and ordinances. If unsure about household wiring procedures, call your local heating/air conditioning contractor. METHOD TO INCREASE WIRE LENGTH Refer to the masking tape labels you placed on the wires when you removed your old thermostat.
2 Loosen the terminal screws and slip each wire beneath its matching terminal. See illustration (below) for proper wiring technique. Securely tighten the terminals. 3 Plug the hole in the wall with insulation to help prevent drafts from adversely affecting thermostat operation. PROPER WIRING TECHNIQUE 5/16 IN.
3-WIRE HEAT-ONLY 4-WIRE COOL-ONLY A A B B W W Y C C G R R HEATING RELAY OR VALVE COIL COOLING CONTACTOR COIL 1 L1 (HOT) L2 1 Y G POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. FAN RELAY 1 L1 (HOT) L2 M9213 1 26 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
5-WIRE HEAT/COOL A B W C HEATING RELAY OR VALVE COIL Y G R FAN RELAY COOLING CONTACTOR COIL 1 L1 (HOT) L2 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
Mount Thermostat NOTE: To remove the thermostat from the wall, first pull out at the bottom of thermostat, then remove the top. A. ENGAGE TABS AT TOP OF THERMOSTAT AND MOUNTING PLATE. B. PRESS LOWER EDGE OF CASE TO LATCH. C. M879 28 SWING COVER OPEN TO CHECK OPERATION.
Press key until the setting is about 10°F (6°C) above room temperature. Heating should start and the fan should run after a short delay (immediately if fan operation switch is set in E position). Check Thermostat Operation After Programming and Installing Heating Do not check heating system operation such as the gas valve, zone valve or oil burner control by jumpering thermostat terminals at the primary control. This damages the thermostat. Instead, jumper R and W wires at the thermostat.
Press the key until the setting is about 10°F (6°C) below room temperature. The cooling equipment and fan should start. NOTE: When cooling setting is changed, thermostat can delay up to five minutes before turning on the air conditioner. This delay protects the compressor. Move the system switch to COOL and the fan switch to AUTO. Cool Off Heat Auto On Press the key until the setting is about 10°F (6°C) above room temperature. The cooling equipment and fan should stop.
more efficient electronic air cleaning. (In a heat-only system, the fan runs continuously only when the fan relay is connected to the thermostat.) Set Fan and System Switches First set the fan switch. Auto On AUTO: Normal setting for most homes. A single-speed fan turns on automatically with the air conditioner or furnace. A two-speed fan usually runs on high with the air conditioner and on low with the furnace. Then set the system switch.
Troubleshooting Guide IF… Display will not come on. THEN… ■ Check that the green light emitting diode (LED) located to the left of the LCD is lit, indicating the thermostat is powered properly. Temperature display will not go lower than 45°F (7°C) or higher than 88°F (31°C) during programming. ■ You have reached the temperature setting limit. The setting range is 45°F to 88°F (7°C to 31°C). Temperature change occurs at the wrong times. ■ Check the program times for the period in question.
Heating will not come on (Cont). ■ Check the system fuse or circuit breaker and replace or reset, if necessary. ■ Check for correct wiring and good connections. ■ If temperature setting is higher than current temperature and displays HEAT, contact Honeywell Customer Assistance at 1-800-468-1502. Cooling will not come on. ■ Check that the green LED is lit. ■ Check that the switch on the thermostat is set to COOL. ■ Check the system fuse or circuit breaker and replace or reset, if necessary.
Cooling will not come on (Cont). ■ If temperature setting is lower than current temperature, and displays COOL, move system switch from COOL to OFF for ten minutes. After ten minutes, return switch to COOL position. If the air conditioner comes on, compressor could have reached its high limit temperature protection and shut down. If the air conditioner does not come on after ten minutes and displays COOL, contact Honeywell Customer Assistance at 1-800-468-1502. The house is too warm or too cool.
The furnace or air conditioner on-time is too short or too long. ■ Contact your heating or air conditioner contractor. If further assistance is needed, call Honeywell Customer Assistance at 1-800-468-1502. The thermostat’s current setting does not match the display temperature. ■ Check that the wiring hole in the wall behind the wallplate was plugged with insulation to prevent drafts that could adversely affect thermostat operation.
Toll-free Customer Assistance For all questions concerning this thermostat, please read and follow the instructions. If additional assistance is needed, call Honeywell Customer Assistance toll-free at 1-800-468-1502, MondayFriday, 7:00 a.m.-5:30 p.m. Central time. Before you call, please have the following information available—thermostat model number and date code, type of heating/cooling system (for example, hot water, warm air, oil, or gas), and number of wires connected to the thermostat.
TYPICAL ENERGY SAVINGS FOR REPRESENTATIVE CITIES IN THE U.S. AND CANADA Savings for Once-A-Day 10°F (5°C) decrease Savings for Twice-A-Day 10°F (5°C) decrease* Savings for 5°F (3°) summer increase Approximate percentage of energy cost savings 30% 28% 26% 24% 22% 20% 18% 16% 14% 12% 10% 8% 6% 4% 2% Minneapolis St. Paul Montreal Ottawa Toronto Edmonton Regina Winnipeg Calgary Moncton North Bay Quebec St.
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Limited One-Year Warranty Honeywell warrants this product, excluding battery, to be free from defects in the workmanship or materials, under normal use and service, for a period of one (1) year from the date of purchase by the consumer. If, at any time during the warranty period, the product is defective or malfunctions, Honeywell shall repair or replace it (at Honeywell’s option) within a reasonable period of time.
NOTICE: This equipment is a Class B digital apparatus, which complies with Canadian Radio Interference Regulations, CRC c.1374. Home and Building Control Honeywell Inc. 1985 Douglas Drive North Golden Valley, MN 55422 Home and Building Control Honeywell Limited-Honeywell Limitée 155 Gordon Baker Road North York, Ontario M2H 2C9 69-0887—1 Rev. 5-96 J.S. Printed in Mexico Copyright © 1996 Honeywell Inc.