Heating or Cooling Thermostat and Wallplate or Heating/Cooling Thermostat and Subbase T8090A/191108A, Q682B OWNER’S MANUAL 1 69-0574—2 69-0574-2
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 lower your fuel costs, while awakening (or returning home) to a comfortable temperature. Read this manual to learn how to use your new thermostat.
TABLE OF CONTENTS Features Of Your Thermostat ........................................................................................................... 4 Setting The Temperature .................................................................................................................. 7 Inserting Clock Batteries ................................................................................................................... 8 Setting The Clock .....................................................
Features Of Your Thermostat 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 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 clockwise to match the correct AM or PM time to the time indicator. 6 TIME INDICATOR. Arrow head indicates time for 24-hour dial. 7 PROGRAM INDEX WHEEL.
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 SCALEPLATE. Calibrated to match the heating system current draw in amperes. 13 ANTICIPATOR SETTING LEVER. Must be adjusted to match the heating system primary control current.
15 191108AJ WALLPLATE. Provides mounting base and wiring connections for heating-only or cooling-only thermostat. 15 M2421 16 Q682B SUBBASE. Provides mounting base, wiring connections and manual switching control for heating/cooling thermostat.
Setting The Temperature 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 temperature you want for normal comfort periods. HIGH TEMPERATURE SETTING LEVER (RED MARK) LOW TEMPERATURE SETTING LEVER (BLUE MARK) 50 NOTE: You may override the time program by setting both the red and blue levers to the same temperature set point.
Inserting Clock Batteries BATTERY LOCATION FOR (2) AAA BATTERIES; INSTALL WITH POSITIVE ENDS UP 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 interrupted when using 24 Vac powering method. Install batteries in thermostat as shown in Fig. 2. Once a year or when batteries are dead, replace with two new AAA alkaline batteries.
Setting The Clock Time ends, move the minute hand carefully in a clockwise direction 23 hours. Do NOT reverse the minute hand, or damage to timer mechanism may occur. 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 clockwise direction. DO NOT reverse the minute hand. When time is correctly set, the Time Indicator Arrow (see Fig.
Programming up to six temperature changes with the pins supplied. We recommend at least five hours for each energy saving period. You can program your thermostat to automatically lower and raise the temperature one or more times every 24 hours. 24-HOUR PROGRAM DIAL (GRAY AREA FOR NIGHT SETTINGS) Before setting your program: FLIP-UP COVER Lift thermostat flip-up cover and you'll find the 24-hour program dial. The slots on the program dial (Fig.
To change the pins or add a new energy savings period: • • • Decide when you want the energy savings period to start and insert a blue pin at the notch that corresponds to this time. After the blue pin engages, the furnace will be off until room temperature drops to the energy savings set point. 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.
Setting the Cooling Program: Decide when you want the energy savings period to start and insert a red pin at the notch that corresponds to this time. After the red pin engages, the air conditioner will be off until room temperature rises to the energy savings set point. 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.
Start Or End Programs With Manual Program Advance Button IMPORTANT:To prevent damage to the program Press the button to immediately begin an energy savings period or return to the normal setting. After pressing the button, check the program indicator to ensure the system is in the desired mode. If the program indicator shows blue, the lower temperature is in effect; if it shows red, the higher temperature is in effect. Using the manual advance button will not affect the stored program.
Troubleshooting Your Honeywell thermostat requires little or no attention. Most problems can generally be traced to the following: Problem No heat. Check Action — 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 reset breaker. — furnace power switch. May be Off. Move switch to ON. — pilot flame. May be out. Relight pilot flame per furnace manufacturers instructions.
Troubleshooting (continued) Problem Check Action Energy savings — program dial for proper day or temperature program night phase. 12 hours off. Turn timer ahead 12 hours. Move setting knob clockwise only. Rooms do not warm up at programmed time. 2 — timer program for heating system. May need more time to warm up rooms. Move red pin one-half hour earlier on the program dial. Temperature change occurs at the wrong time. — programs pins for correct time locations. Relocate pins to desired settings.
Troubleshooting (continued) Problem Room temperatures are not correct (continued). Check Action — 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–Move temperature setting levers 5°F (3°C) below room temperature. Cooling system should start. If the system does not operate, call a qualified technician.
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. (See figure on page 23 for anticipator location.) Increase anticipator setting by 0.05. Observe burner operation. Burner-on time too long. — anticipator setting.
Troubleshooting (continued) Problem No cooling (continued) Check 1 Action — condenser switch position. Located outdoors and may be turned OFF. Move to ON position. — thermostat connections. Check Turn OFF power to cooling system. for correct terminal hookups. Repair any frayed or broken wires. Firmly tighten all terminal screws. Thermostat setting and thermometer reading disagree. — other. Contact a qualified service technician for assistance. — level position of thermostat.
Troubleshooting (continued) Problem Check Action Thermostat setting and thermometer reading disagree (continued). — calibration of thermometer. Clock does not run. — thermostat connections at the two C terminals. If no connections, clock needs batteries in order to run. 3 Batteries may not have been installed. Batteries may need replacement See instructions on page 24. Install as shown on page 8. Replace with two new AAA alkaline batteries as shown on page 8.
Troubleshooting (continued) Problem Clock does not run (continued). Clock loses time. Check Action — 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. — power. May be interrupted. Make sure power is on. Reset clock. — high limit control.
Troubleshooting (continued) Problem Clock loses time (continued). Check Action — batteries may need replacement. Replace with two new AAA alkaline batteries as shown on page 8. We recommend Energizer® batteries. 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.
Voltage At Clock Terminals AC Voltge at C-C Terminals 0 Vac. Up to 15 Vac. 15 to 30 Vac. 69-0574—2 Check 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. System transformer used to power the clock is inadequate. 2. Additional (separate) transformer used to power the clock has inadequate voltage. 1. Spring fingers o thermostat not making proper contact with subbase terminals. 2. Clock has failed. 22 1. 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 (Fig. 6). Observe the heating system operation after each adjustment. ANTICIPATOR SCALEPLATE ANTICIPATOR SETTING LEVER NOTE: Most hot water systems require a setting of 1.2A.
Thermometer Adjustment The thermometer has been accurately calibrated at the factory and should only need adjustment 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 table near thermometer of known accuracy. Allow at least five minutes for cover thermometer to sense area temperature, then THERMOMETER BACKSIDE OF SLOT compare the readings.
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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 conditioner.
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.
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 D.F. ©Honeywell Inc. 1995 69-0574—2 Rev.
