Honeywell T8090T manual

69-0432-1 Zone Thermostat Heating/Cooling Thermostat and Subbase or W allplate Model T8090T OWNER’S MANUAL[...]

2 69-0432—1 Welcome to the world of energy savings with your new Honeywell Trol-A-Temp Zone ® Thermostat. Your new thermostat will automatically control the temperature in your home to provide a high level of comfort plus energy savings when programmed according to the instructions in this manual. With zone control, you heat or cool each zone or[...]

3 69-0432—1 Table of Contents PAGE Features of Your Thermostat .................................................................................................... ........ 4 Setting the Temperature ........................................................................................................ ........... 7 Inserting Clock Batteries ....[...]

4 69-0432—1 Features of Y our Thermostat 1 FLIP-UP COVER. Lift it up to set clock for energy savings and normal temperature periods. 2 THERMOSTAT COVER. 3 THERMOMETER. Provides accurate room temperature reading. 4 CLOCK. This clock provides a 24-hour slotted dial to hold the programming pins. 5 CLOCK HANDS. Turn minute hand clock- wise to match t[...]

5 69-0432—1 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 PRO GRAM AD V ANCE BUTTON. Allows change from comfort to energy savings setting and vice versa without changing the program. 12 HEAT ANTICIPATO[...]

6 69-0432—1 15 WALLPLATE Provides mounting base and wiring con- nections for control of zones other than zone 1 in heating or heating-cooling systems. 16 SUBBASE Provides mounting base, wiring connec- tions and manual switching for control of zone 1 in heating or heating-cooling systems. M2421 15 M8690 W Y R G 16[...]

7 69-0432—1 Setting The T emperature For Heating: ■ Set the left lever (blue mark) to the energy savings temperature you want when you are sleeping or the associated zone is unoccu- pied. ■ Set the right lever (red mark) to the temp- erature you want for normal comfort periods. NOTE: You may override the time program by setting both the red a[...]

8 69-0432—1 Inserting Clock Batteries Power is supplied to the clock by two AAA alkaline batteries (included). Install batteries in thermostat as shown in Fig. 2. Once a year or when batteries are dead, replace with two new AAA alkaline batteries. We recommend Energizer ® batteries. BATTERY LOCATION FOR (2) AAA BATTERIES; INSTALL WITH POSITIVE E[...]

9 69-0432—1 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 a clock- wise direction. DO NOT reverse the minute hand. When time is correctly set, the time indicator arrow (see Fig. 3) will point [...]

10 69-0432—1 Daylight Savings Time When Daylight Savings Time starts, move the minute hand carefully in a clockwise direction one hour. When Daylight Savings Time ends, move the minute hand carefully in a clockwise direction 23 hours. Do NOT reverse the minute hand, or damage to the timer mechanism may occur.[...]

11 69-0432—1 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 ■ To insert a pin, push it straight into the selected notch on the program dial until it is completely seated. ■ Lift thermostat flip-up cover and you’ll find the 24-hour pr[...]

12 69-0432—1 pin is inserted at 6:00 AM for high temperature (comfort period); a blue pin is inserted at 10:00 PM for low temperature (energy saving period). Two additional sets of pins are located in the program pin storage area. You can set up to six temperature changes with the pins supplied. We recomment at least five hours for each energy sa[...]

13 69-0432—1 Setting the Heating Program ■ Decide when you want the temperature to reach the comfort level. Find the notch on the dial that is one-half hour before this time and insert a red pin. The half-hour head start gives the furnace time to heat the house before you wake up or arrive home. ■ Decide when you want the energy saving period[...]

14 69-0432—1 Setting the Cooling Program ■ Decide when you want the temperature to reach the comfort level. Find the notch on the dial that is 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 savi[...]

15 69-0432—1 Tr oub leshooting Your Honeywell Trol-A-Temp ® Thermostat requires little or no attention. Most problems can be traced to the following. (continued) PROBLEM CHECK ACTION No heat. —system switch. May be in OFF or COOL position. 1 Move system switch to HEAT position. —fuse or circuit breaker. If blown or tripped, replace fuse or r[...]

16 69-0432—1 Troubleshooting (continued) (continued) PROBLEM CHECK ACTION No heat. —other. Contact a qualified service technicial for assistance. Energy saving temperature program 12 hours off. —program dial for proper day or night phase. Turn clock ahead 12 hours. Move minute hand clockwise only. Rooms do not warm up at programmed time. —t[...]

17 69-0432—1 Troubleshooting (continued) (continued) PROBLEM CHECK ACTION Room temperatures are not correct. —thermostat circuits. HEATING—Make sure zone 1 sy- stem switch is set at HEAT and fan switch is set at AUTO. Move temp - erature setting levers on the appro- priate zone thermostat 5° F [3° C] above room temperature. Heating should s[...]

18 69-0432—1 Troubleshooting (continued) (continued) PROBLEM CHECK ACTION No cooling. 2 —system switch. May be in OFF or HEAT position. 1 Move switch to COOL position. —fuse or circuit breaker. If fuse is blown or breaker tripped, replace or reset. —condenser switch position. Located outdoors and may be turned Off. Move to ON position. —c[...]

19 69-0432—1 Troubleshooting (continued) 1 Applicable on zone 1 thermostat only. 2 Not applicable on heating-only system. If this Troubleshooting section has not solved the problem, call a qualified Trol-A-Temp ® customer service at or service technician, 1-800-828-8367 for additional assistance. PROBLEM CHECK ACTION Clock does not run. —volta[...]

20 69-0432—1 Voltage at Clock Terminals AC VOLTAGE AT C-R TERMINALS POSSIBLE CAUSE CHECK ACTION 0 Vac 1. System power is Off. 1. Restore power. 2. Short in clock power supply wiring. 2. Replace wiring. 3. Limit switch contacts stuck open. 3. Free or replace limit switch. 4. Transformer supplying power is burned out. 4. Replace transformer. Up to [...]

21 69-0432—1 Servicing the Thermostat Heat Anticipator Setting The T8090T Thermostat has an adjustable heat anticipator that was factory-set at 0.1A. The heat anticipator must be set at 0.1A for proper system operation. See Fig. 6. M8596 MOVE INDICATOR TO 0.1A Fig. 6—Heat anticipator setting.[...]

22 69-0432—1 Thermometer Adjustment The thermometer was accurately calibrated at the factory and should only need adjustment if it was dropped or mishandled. If the setpoint lever and the thermometer reading do not agree, follow the procedure below. Remove the thermostat cover and open the flip-up cover. Set the thermostat cover on a table near a[...]

23 69-0432—1 If you have questions regarding the installation and programming of your Honeywell Trol-A- Temp ® Thermostat, please contact a Trol-A-Temp ® customer servoce re[resentative at 1-800- 828-8367. Before you call, please have the following information available: Make and model of your furnace, old thermostat and air conditioner.[...]

D.F. ©Honeywell Inc. 1995 Printed in Mexico Rev. 1-95 Form Number 69-0432—1 Home and Building Control Home and Building Control Helping You Control Your World Honeywell Inc. Honeywell Limited—Honeywell Limitée 1985 Douglas Drive No. 740 Ellesmere Road Golden Valley, MN 55422 Scarborough, Ontario M1P 2V9 M3375[...]