Honeywell T8090T - Manuals

8 69-0432—1 Inserting ClockBatteries Power is supplied to the clock by two AAA alkaline batteries (included). Install batteries inthermostat as shown in Fig. 2. Once a year orwhen batteries are dead, replace with two newAAA alkaline batteries. We recommendEnergizer ® batteries. BATTERY LOCATION FOR(...

9 69-0432—1 Setting the Clock Lift thermostat flip-up cover and you’ll find the 24-hour program dial, slotted in 10-minuteincrements. Adjust the clock to the current timeby moving the minute hand carefully in a clock-wise direction. DO NOT reverse the minute hand. When time is correctly set, the tim...

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

11 69-0432—1 Programming You can program your thermostat to automatically lower and raise the temperatureone or more times every 24 hours. Before setting your program ■ To insert a pin, push it straight into theselected notch on the program dial until it iscompletely seated. ■ Lift thermostat flip-u...

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

13 69-0432—1 Setting the Heating Program ■ Decide when you want the temperature to reach the comfort level. Find the notch on the dialthat 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. ■ De...

14 69-0432—1 Setting the Cooling Program ■ Decide when you want the temperature to reach the comfort level. Find the notch on the dialthat 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 h...

15 69-0432—1 Troubleshooting 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 orCOOL position. 1 Move system switch to HEATposition. —fuse or circuit breaker....

16 69-0432—1 Troubleshooting (continued) (continued) PROBLEM CHECK ACTION No heat. —other. Contact a qualified service technicialfor assistance. Energy savingtemperature program12 hours off. —program dial for proper day ornight phase. Turn clock ahead 12 hours. Moveminute hand clockwise only. Rooms ...

18 69-0432—1 Troubleshooting (continued) (continued) PROBLEM CHECK ACTION No cooling. 2 —system switch. May be in OFF orHEAT 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 b...

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. PR...

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 pow...

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 forproper system operation. See Fig. 6. M8596 MOVE INDICATORTO 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 co...

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 ofyour furnac...

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, OntarioM1P ...