T8190A/191108AJ, Q682 Heating or Cooling Thermostat and Wallplate or Heating/Cooling Thermostat and Subbase D.F. Rev. 9-94 ©Honeywell Inc.
Welcome… Recycling Notice to the world of energy savings with your new Honeywell 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 Page Features of Your Thermostat ............................................................................................................ 4 Setting the Temperature .................................................................................................................. 7 Inserting Timer Batteries ................................................................................................................... 8 Setting the Timer ...............................................
FeaturesOf Your Thermostat 1 FLIP-UP COVER. Lift it up to set clock for energy saving and normal temperature periods. 2 THERMOSTAT COVER. Lift up and remove to adjust heat anticipator. 3 THERMOMETER. Provides accurate room temperature reading. 4 TEMPERATURE SETTING LEVERS. Left (blue mark) controls the low temperature, right (red mark) controls the high temperature. 5 TIMER. This timer provides a 24-hour slotted dial to hold the programming pins. 6 TIMER SETTING KNOB.
8 PROGRAM INDEX WHEEL. Controls high and low temperature at specific time of day as set by program pins. 9 PROGRAM PINS. Must be inserted into 24hour timer dial slots to control program index wheel. 10 PIN SLOTS. Located on 24-hour dial at 10minute intervals for program pin insertion. 11 PROGRAM DIAL. 24-hour dial with light band to indicate daytime and dark band to indicator nighttime. 12 HEAT ANTICIPATOR SCALEPLATE. Calibrated to match the heating system current draw in amperes.
15 WALLPLATE (Included with thermostat.) Provides mounting base and wiring connections for heating-only or cooling-only thermostat. 15 M2421 16 SUBBASE (Optional, not included with thermostat; ordered separately.) Provides mounting base, wiring connections and manual switching control for heating/cooling thermostat. See Setting Subbase Switches section for additional information.
Setting the Temperature ForHeating: ■ Set the left lever (blue mark) to the energy saving 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 LOW TEMPERATURE SETTING LEVER 50 NOTE: You may override the time program by setting both the red and blue levers to the same temperature setpoint.
Inserting Timer Batteries BATTERY LOCATION FOR (2) AAA BATTERIES; INSTALL WITH POSITIVE ENDS UP Power is supplied to the timer 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 timer if power is interrupted when using a 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 Timer the knob carefully in a clockwise direction 23 hours. Do NOT reverse the knob, 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 timer to the current time by carefully turning the knob clockwise . DO NOT reverse the knob.
Programming 24-HOUR PROGRAM DIAL (GRAY AREA FOR NIGHT SETTINGS) You can program your thermostat to automatically lower and raise the temperature one or more times every 24 hours, depending on the number of program pins used. FLIP-UP COVER Before setting your program Notice the slots on the program dial (Fig. 4). The dial is slotted for the program pins that can be inserted at 10-minute intervals. ■ Lift thermostat flip-up cover and you will find the 24-hour program dial.
reset the pins when the seasons change. You will also probably want to change the lever positions. 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 recommend at least five hours for each energy saving period.
NIGHT ENERGY SAVING PERIOD BEGINS 10:00 PM ENDS 6:00 AM DAY BEGINS ENERGY 7:30 AM SAVING ENDS PERIOD 4:00 PM WINTER SUMMER PROGRAM PROGRAM TEMPERATURE PIN IN TEMPERATURE PIN IN CONTROL °F °C CONTROL °F °C 58 27 80 14 BLUE RED 68 20 RED 75 24 BLUE 58 14 BLUE 80 27 RED 68 20 RED 75 24 BLUE To set 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.
Setting Subbase Switches (if applicable) The subbase fan switch controls fan operation as follows: ON—Fan operates continuously. AUTO—Fan operates with cooling equipment as controlled by the thermostat or with the heating equipment as controlled by the plenum fan switch. In electric heat, heat pump and fan coil systems, the fan is controlled by the thermostat in heating and cooling. To switch positions, use thumb or index finger to slide the lever to the desired position.
Troubleshooting Your Honeywell thermostat requires little or no attention. Most problems can generally be traced to the following. Problem No heat. 2 Check — System switch may be in OFF or COOL position. — Fuse or circuit breaker. — Furnace power switch may be OFF. — Pilot flame may be out. — Thermostat connections. — Other. 14 Action Move system switch to HEAT position. If blown or tripped, replace fuse or reset breaker. Move switch to ON .
Troubleshooting (Continued) Problem Energy saving temperature program is 12 hours. Rooms do not warm up at the programmed 2 time. Temperature change occurs at the wrong time. Room temperatures are not correct. Check — Program dial for proper day or night phase. Action Turn timer ahead 12 hours. Turn knob clockwise only. — Timer program for heating system may need more time to warm up rooms. Move red pin one-half hour earlier on the program dial. — Program pins for correct time locations.
Troubleshooting (Continued) Problem Room temperatures are not correct (continued). Check — Thermostat circuits. Burner-on time too short. — Anticipator setting. (See Fig. 6 for anticipator location.) Burner-on time too long. — Anticipator setting. (See Fig. 6 for anticipator location.) Action Heating mode—Move temperature setting levers 5° F [3° C] above room temperature. Heating system should start. Cooling mode—Move temperature setting levers 5° F [3° C] below room temperature.
Troubleshooting (Continued) Problem No cooling. 1 Check Action — System switch may be in OFF or HEAT position. — Fuse or circuit breaker. Move switch to COOL position. — Condenser switch position. Located outdoors and may be turned off. — Thermostat connections. Check for correct terminal hookups. Repair any frayed or broken wires. Firmly tighten all terminal screws. — Other. If fuse is blown or breaker tripped, replace or reset. If fuse blows again, call the heating and air conditioning dealer.
Troubleshooting (Continued) Problem Thermostat setting and thermometer reading disagree. Timer does not run. Check — Level position of thermostat. — Area around thermostat for drafts or radiant heat. — Calibration of thermometer. —Thermostat connections at the two C terminals. If no 3 connections, timer needs batteries in to run. — Batteries may not have been installed. — Batteries may need replacement. — If new batteries are installed and timer still does not run.
Troubleshooting (Continued) Problem Check Timer does not — Voltage across the two C run (continued). terminals. Timer loses time. — Pins in program dial. If pins are not completely seated in program dial, jamming with index wheel can occur. — Power may be interrupted. — High limit control. If timer powered through system transformer, power to timer and equipment may be off on safety. — Filter may be clogged. Safety limit on equipment can cut off power to system.
Troubleshooting (Continued) Problem Timer loses time (continued). Check — Batteries may need replacement. Action Replace with two new AAA alkaline batteries as shown in Fig. 2. 1 Not applicable on model used in heating-only system. 2 Not applicable on model used in cooling-only system. 3 If timer is not battery powered, timer may still use batteries for backup.
VoltageAtTimerTerminals AC Voltages at C-CTerminals 0 Vac. Up to 15 Vac. 15 to 30 Vac. Check — System power off. — Short in timer power supply wiring. — Limit switch contacts stuck open. — Transformer supplying power is burned out. — System transformer used to power the timer is inadequate. — Additional (separate) transformer used to power the timer has inadequate voltage. — Spring fingers on thermostat not making proper contact with subbase terminals. — Timer has failed. 21 Action — Restore power.
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 was accurately calibrated at the factory and should only need adjustment if it has been dropped or mishandled. If the setpoint 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 a thermometer of known accuracy. Allow at least five minutes for cover thermometer to sense area temperature; then compare the readings.
If you have questions regarding the installation and programming of your Honeywell thermostat, please visit our web site at www.honeywell.com/yourhome or call the 24-hour automated information line at 1-800-468-1502.
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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.
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