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Honeywell T8090A/191108A manual

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Table of contents for the manual

  • Page 1

    1 69-0574—2 Heating or Cooling Thermostat and W allplate or Heating/Cooling Thermostat and Subbase T8090A/191108A, Q682B OWNER’S MANUAL 69-0574-2[...]

  • Page 2

    69-0574—2 2 Welcome to the world of energy savings with your new Honeywell fuel saver thermostat. The Honeywell name is your assurance of accurate control and reliable operation for years to come. Your new thermostat will automatically lower and raise the temperature in your home one or more times every 24 hours. This allows you to significantly [...]

  • Page 3

    3 69-0574—2 TABLE OF CONTENTS Features Of Your Thermostat .................................................................................................... ....... 4 Setting The Temperature ........................................................................................................ .......... 7 Inserting Clock Batteries ...........[...]

  • Page 4

    69-0574—2 4 Features Of Y our Thermostat 8 TEMPERATURE SETTING LEVERS. Left (blue mark) controls the low temperature, right (red mark) controls the high temperature. 1 FLIP-UP COVER. Lift it up to set clock for energy savings and normal temperature periods. 2 THERMOSTAT COVER. Lift up and remove to adjust heat anticipator. 3 THERMOMETER. Provides[...]

  • Page 5

    5 69-0574—2 9 PROGRAM PINS. Must be inserted into 24-hour clock dial slots to control program index wheel. 10 PIN SLOTS. Located on 24-hour dial at 10-minute intervals for program pin insertion. 11 MANUAL PROGRAM ADVANCE BUTTON. Allows change from comfort to energy savings setting and vice versa without changing the program. 12 HEAT ANTICIPATOR S[...]

  • Page 6

    69-0574—2 6 15 191108AJ WALLPLATE. Provides mount- ing base and wiring connections for heating-only or cooling-only thermostat. 16 Q682B SUBBASE. Provides mounting base, wiring connections and manual switching control for heating/cooling thermostat. M2421 15 AUTO OFF COOL HEAT ON FAN B O W Y R G M719 16[...]

  • Page 7

    7 69-0574—2 Setting The T emperature For Heating: Set the left lever (blue mark) to the energy savings temperature you want when you are sleeping or your home is unoccupied. Set the right lever (red mark) to the tem- perature you want for normal comfort periods. NOTE: You may override the time program by setting both the red and blue levers to th[...]

  • Page 8

    69-0574—2 8 Inserting Clock Batteries Power is supplied to the clock by the 24 Vac transformer, by two AAA alkaline batteries (included), or by the heating or cooling control circuit. Backup batteries may be installed to supply power to the clock if power is inter- rupted when using 24 Vac powering method. Install batteries in thermostat as shown[...]

  • Page 9

    9 69-0574—2 Setting The Cloc k Lift thermostat flip-up cover and you’ll find the 24-hour program dial, slotted in 10-minute increments. Adjust the clock to the current time by moving the minute hand carefully in clock- wise direction. DO NOT reverse the minute hand. When time is correctly set, the Time Indicator Arrow (see Fig. 3) will point to[...]

  • Page 10

    69-0574—2 10 Pr ogramming You can program your thermostat to automatically lower and raise the temperature one or more times every 24 hours. Before setting your program: Lift thermostat flip-up cover and you'll find the 24-hour program dial. The slots on the program dial (Fig. 4) are for the program pins that can be inserted at ten-minute in[...]

  • Page 11

    11 69-0574—2 To change the pins or add a new energy savings period: • To insert a pin, push it straight into the selected notch on the program dial until it’s completely seated. • To remove a pin, press against program dial and pull the pin straight out. DO NOT attempt to change a pin if it is engaged with the program index wheel. • On he[...]

  • Page 12

    69-0574—2 12 Setting the Cooling Program: Decide when you want the temperature to reach the comfort level. Find the notch on the dial that’s one-half hour before this time and insert a blue pin. The half-hour head start gives the air conditioner time to cool the house before you wake up or arrive home. Decide when you want the energy savings pe[...]

  • Page 13

    13 69-0574—2 Star t Or End Pr ograms With Manual Pr ogram Adv ance Button IMPORTANT: To prevent damage to the program advance mechanism, DO NOT use the program advance button within a 30-minute period before or after a program change. The manual program advance button enables immediate, one-time-only program changes to accommodate temporary sched[...]

  • Page 14

    69-0574—2 14 Tr oubleshooting Your Honeywell thermostat requires little or no attention. Most problems can generally be traced to the following: Problem Check Action No heat. — system switch. May be in OFF or COOL position. Move system switch to HEAT position. — fuse or circuit breaker. If blown or tripped, replace fuse or reset breaker. — [...]

  • Page 15

    15 69-0574—2 Troubleshooting (continued) Problem Check Action Energy savings temperature program 12 hours off. — program dial for proper day or night phase. Turn timer ahead 12 hours. Move setting knob clockwise only. Rooms do not warm up at programmed time. — timer program for heating system. May need more time to warm up rooms. Move red pin[...]

  • Page 16

    69-0574—2 16 Troubleshooting (continued) (continued) Problem Check Action Room temperatures are not correct (continued). — thermostat circuits. HEATING-ONLY SYSTEM—Move temperature setting levers 5°F (3°C) above room temperature. Heating system should start. If the system does not operate, call a qualified technician. COOLING ONLY SYSTEM–[...]

  • Page 17

    17 69-0574—2 Troubleshooting (continued) Problem Check Action Room Temperatures are not correct ( continued). With system switch at COOL, move temperature setting levers 5°F (3°C) below room temperature. Cooling system should start. If the systems do not operate, call a qualified technician. Burner-on time too short. — anticipator setting. (S[...]

  • Page 18

    69-0574—2 18 Troubleshooting (continued) Problem Check Action No cooling 1 (continued) — condenser switch position. Located outdoors and may be turned OFF. Move to ON position. — thermostat connections. Check for correct terminal hookups. Repair any frayed or broken wires. Firmly tighten all terminal screws. Turn OFF power to cooling system. [...]

  • Page 19

    19 69-0574—2 Troubleshooting (continued) 3 Problem Check Action Thermostat setting and thermometer reading disagree (continued) . — calibration of thermometer. See instructions on page 24. Clock does not run. — thermostat connections at the two C terminals. If no connections, clock needs batteries in order to run. Batteries may not have been [...]

  • Page 20

    69-0574—2 20 Troubleshooting (continued) (continued) Problem Check Action Clock does not run (continued) . — pins in program dial. If pins are not completely seated in program dial, jamming with index wheel may occur. Push down on pins to make sure they are completely seated in program dial. Clock loses time. — power. May be interrupted. Make[...]

  • Page 21

    21 69-0574—2 Troubleshooting (continued) 1 Not applicable on model used in heating-only system. 2 Not applicable on model used in cooling-only system. 3 If clock is not battery powered, clock may still use batteries for backup. If this Troubleshooting section has not solved the problem, call your qualified heating service technician or Honeywell [...]

  • Page 22

    69-0574—2 22 Voltage At Clock Terminals AC Voltge at C-C Terminals Check Action 0 Vac. 1. System power off. 2. Short in clock power supply wiring. 3. Limit switch contacts stuck open. 4. Transformer supplying power is burned out. 1. Restore power. 2. Replace wiring. 3. Free or replace limit switch. 4. Replace transformer. Up to 15 Vac. 1. System [...]

  • Page 23

    23 69-0574—2 Servicing The Thermostat Cycle Rate Adjustment The equipment should cycle on and off just enough to keep the room temperature close to the temperature lever settings. If the thermostat seems to cycle the heating system too fast or too slow, adjust the cycle rate by moving the anticipator setting lever one indicator mark at a time (Fi[...]

  • Page 24

    69-0574—2 24 Thermometer Adjustment The thermometer has been accurately calibrated at the factory and should only need adjust- ment if it has been dropped or mishandled. If the set point lever and the thermometer reading do not agree, follow the procedure below. Remove thermostat cover and open the flip-up cover. Set the thermostat cover on a tab[...]

  • Page 25

    25 69-0574—2[...]

  • Page 26

    69-0574—2 26 If you have questions regarding the installation and programming of your Honeywell thermostat, please contact the Honeywell Customer Assistance Center at 1-800-468-1502, Monday-Friday, 7:00 AM to 5:30 PM, Central time. Before you call, please have the following information available: make and model of furnace, old thermostat and air [...]

  • Page 27

    27 69-0574—2 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 sh[...]

  • Page 28

    69-0574—2 28 D.F. ©Honeywell Inc. 1995 Rev. 1-95 Form Number 69-0574—2 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[...]