Electronic Thermostats MODEL 8344 HEAT/COOL NON-PROGRAMMABLE MODEL 8346 HEAT PUMP NON-PROGRAMMABLE MODEL 8348 HEAT/COOL MULTI-STAGE NON-PROGRAMMABLE MODEL 8363 HEAT/COOL 5/2 DAY PROGRAMMABLE MODEL 8365 HEAT PUMP 5/2 DAY PROGRAMMABLE MODEL 8366 HEAT/COOL MULTI-STAGE 5/2 DAY PROGRAMMABLE Operating Instructions READ AND SAVE THESE INSTRUCTIONS
TABLE OF CONTENTS PRODUCT FEATURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 GETTING FAMILIAR WITH YOUR APRILAIRE THERMOSTAT . . . . . . . . . . . . . . .3 OPERATING INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 Operating Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 Temporarily Raise and Lower Temperature . . . . . . . . . . . . . . . . .
PRODUCT FEATURES • Large, easy to read, backlit display. • Simple programming with 4 events for weekdays and selectable 2 or 4 events on the weekend. • Pre-programmed with ENERGYSTAR‚ recommended settings. • Set point and room temperature are displayed simultaneously. • Freeze protection. • Low battery indicator. • High temperature protection (Models 8344, 8348, 8363 and 8366). • Temporary and permanent (vacation) hold. • Change Water Panel indicator. • Change air filter indicator.
GETTING FAMILIAR WITH YOUR APRILAIRE THERMOSTAT See Figure 1 for a description of the thermostat and controls. Figure 1 PROGRAMMABLE MODELS ONLY Auxiliary Heat Light (Models 8346 & 8365 only) Set Time – Hour, AM/PM, Minute, Day Events – Temperature and Time Check Equipment Light (Models 8346 & 8365 only) AUX Large, Backlit Display CHECK WAKE LEAVE RETURN SLEEP OVERRIDE CURRENT TIME F C Press to Hold temperature.
OPERATING INSTRUCTIONS OPERATING MODES Your thermostat has three operating modes, COOL, OFF and HEAT. Heat pump Models 8346 & 8365 have an additional EMERGENCY HEAT mode (E-HEAT on display). COOL HEAT In the COOL mode, the thermostat will control the cooling system and maintain your cooling set point. In HEAT mode, the thermostat will control the heating system. NOTE: There is a 4-minute delay after a cooling call is completed. This is to protect the equipment’s compressor from short cycling.
FAN OPERATION The thermostat has two settings for fan operation, AUTO and ON. AUTO ON In the AUTO setting, the fan operates only when the heating or cooling equipment is on. In the ON setting, the fan will operate continuously. PROGRAMMING YOUR THERMOSTAT – MODELS 8363, 8365 & 8366 SET CURRENT TIME AND DAY 1. Press CURRENT TIME and use the to ADJUST the current hour. IMPORTANT: ADJUST HOUR TO APPROPRIATE AM/PM SETTING. NOTE: The flashing information is being adjusted. 2.
PROGRAM EVENTS Your thermostat has 5/2 (5 weekdays and 2 weekend days) programming functionality, which allows the user to set four events for the weekdays (Monday through Friday) and two or four events for the weekend (Saturday and Sunday). The events are WAKE, LEAVE, RETURN and SLEEP. If you are normally home on the weekend, you can set up your thermostat to use only 2 events (WAKE and SLEEP) on Saturday and Sunday. WAKE is the time and temperature setting you desire when you wake in the morning.
TO CHANGE THE HEATING PROGRAM WAKE – WEEKDAY 1. Move the MODE switch to the HEAT position. 2. Press the PROGRAM button and then to ADJUST the weekday WAKE time. 3. Press the PROGRAM button again to advance to and adjust the WAKE temperature. LEAVE – WEEKDAY 4. Press the PROGRAM button and then to ADJUST the weekday LEAVE time. 5. Press the PROGRAM button again to advance to and adjust the LEAVE temperature. RETURN – WEEKDAY 6. Press the PROGRAM button and then to ADJUST the weekday RETURN time. 7.
BATTERY REPLACEMENT NOTE: New batteries must be replaced within one minute after removal of old batteries. If more than one minute elapses the programmed settings will be lost and revert to the factory settings. See Figures 3 and 4 for cover removal and battery orientation. Replace batteries once per year or when “LOW BATTERY” appears on the display. This will keep the thermostat working properly. Replace with two new AA alkaline batteries. 1. Move FAN switch to AUTO setting. 5. Replace housing. 2.
CLEANING THE THERMOSTAT If the surface of the thermostat becomes dirty it can be cleaned with plain water or a non-abrasive household cleaner including glass cleaner. When using any cleaner, be careful not to get any into the interior of the thermostat. Do not spray any liquid directly onto the thermostat. Spray the cleaner on to a soft cloth and wipe the surface of the thermostat.
3. Display will show only the room temperature and scale. Use the or button to toggle between Fahrenheit (F) or Celsius (C). 4. Press the LIGHT button repeatedly until “DONE” is displayed. F C LIGHT ADJUST TO CHANGE DIFFERENTIAL SETTING (d1) The Aprilaire Thermostat is capable of adjusting the differential to change how often the heating and cooling equipment will cycle on and off. 1. Place the MODE switch in the OFF mode. 2.
1. Place the MODE switch in the OFF mode. 2. Push and hold both of the temperature ADJUST buttons simultaneously ( and ) until “ROOM” and “OFF” are no longer displayed. 3. Press the LIGHT button until “d2” is displayed. Press and Hold Simultaneously MODE Cool • Off • Heat LIGHT ADJUST 4. Thermostat will display “d2” and a number 1, 2 or 3. The number indicates the degrees from the first stage differential setting (d1) before a call for heating or cooling is made. 5.
5. Press the LIGHT button repeatedly until “DONE” is displayed. OR LIGHT ADJUST ADJUST TO CHANGE THE WATER PANEL INDICATOR SETTING The Aprilaire Thermostat is capable of indicating when the Water Panel of a humidifier should be changed. 1. Place the MODE switch in the OFF mode. 2. Push and hold both of the temperature ADJUST buttons simultaneously ( and ) until “ROOM” and “OFF” are no longer displayed. 3. Press the LIGHT button several times until “CHANGE WATER PANEL” is displayed on the thermostat.
3. Press the LIGHT button several times until “WATER PANEL” is displayed on the thermostat. 4. Use the or button to set this value to “1” if the home has an Aprilaire Model 400 whole house humidifier. The Water Panel in the Model 400 should be changed twice per season and this feature will cause the Water Panel Change Alert to appear on the display 90 days after the first alert.
CHANGE FILTER CHANGE FILTER LIGHT ADJUST TABLE 1 FILTER TYPE CHANGE FREQUENCY THERMOSTAT SETTING Disable the feature OFF Disposable Panel 1 month Washable Electrostatic 3 months 3 6-12 months 6 or 12 Extended Media (Aprilaire) 1 TO SET NUMBER OF WEEKEND EVENTS (MODELS 8363, 8365 AND 8366 ONLY) Use this feature to set the number of events for the weekend program.
LIMITED WARRANTY Your Research Products Corporation Aprilaire® Thermostat unit is expressly warranted for two (2) years from date of installation to be free from defects in materials and workmanship.
