Aprilaire 8365 Operating Instructions Manual

Aprilaire 8365 Operating Instructions Manual

Heat/cool multi-stage 5/2 day programmable
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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

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Questions and answers

Mila
May 1, 2025

How to change Fahrenheit to Celsius

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1 comments:
Mr. Anderson
May 16, 2025

To change Fahrenheit to Celsius on the Aprilaire 8365:

1. Locate the manual switch marked “F” (Fahrenheit) and “C” (Celsius) at the top center of the circuit board.
2. Move the switch to the “C” position.
3. Press the RESET button located just below the LCD display to apply the change.

The display will then show the temperature in Celsius.

This answer is automatically generated

Summary of Contents for Aprilaire 8365

  • Page 1: Operating Instructions

    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...
  • Page 2: Table Of Contents

    PRODUCT FEATURES ..........2 GETTING FAMILIAR WITH YOUR APRILAIRE THERMOSTAT ....3 OPERATING INSTRUCTIONS .
  • Page 3: Product Features

    Electronic Thermostat, you have made a significant step toward conserving energy usage and costs, while improving your indoor comfort. In fact, the Aprilaire Electronic Thermostat Models 8363, 8365 & 8366 have earned the “E ® ” designation of the U. S. Environmental Protection NERGY Agency (EPA).
  • Page 4: Thermostat, Controls, Display

    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 Check Equipment Light (Models 8346 & (Models 8346 & 8365 only) Large, Backlit Display 8365 only) Set Time –...
  • Page 5: Operating Instructions

    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 In HEAT mode, the thermostat will will control the cooling system and control the heating system.
  • Page 6: Fan Operation

    FAN OPERATION The thermostat has two settings for fan operation, AUTO and ON. AUTO In the AUTO setting, the fan In the ON setting, the fan will operates only when the heating or operate continuously. cooling equipment is on. PROGRAMMING YOUR THERMOSTAT – MODELS 8363, 8365 & 8366 SET CURRENT TIME AND DAY 1.
  • Page 7: Program Events

    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.
  • Page 8: To Change The Heating Program

    TO CHANGE THE HEATING PROGRAM WAKE – WEEKDAY RETURN – WEEKDAY 1. Move the MODE switch to the 6. Press the PROGRAM button and then LM to ADJUST the HEAT position. weekday RETURN time. 2. Press the PROGRAM button and then LM to ADJUST the 7.
  • Page 9: Battery Replacement

    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.
  • Page 10: Cleaning The Thermostat

    • • ADJUST TO CHANGE °F TO °C The Aprilaire Thermostat is capable of displaying temperatures in Fahrenheit or Celsius. 1. Place the MODE switch in the OFF mode. 2. Push and hold both of the temperature ADJUST buttons simultaneously (L and M) until “ROOM”...
  • Page 11: To Change Differential Setting

    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. Push and hold both of the temperature ADJUST buttons simultaneously (L and M) until “ROOM”...
  • Page 12: To Change Temperature Offset

    ADJUST ADJUST TO CHANGE TEMPERATURE OFFSET Aprilaire thermostats are factory tested and calibrated within 1° Fahrenheit. However, it may be desirable to adjust the reading of the thermostat to coincide with other temperature measuring devices. 1. Place the MODE switch in the OFF mode.
  • Page 13: To Change The Water Panel Indicator Setting

    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 (L and M) until “ROOM”...
  • Page 14: To Change The Air Filter Indicator Setting

    LIGHT ADJUST TO CHANGE THE AIR FILTER INDICATOR SETTING The Aprilaire Thermostat is capable of indicating when the air filter should be changed. 1. Place the MODE switch in the OFF mode. 2. Push and hold both of the temperature ADJUST buttons simultaneously (L and M) until “ROOM”...
  • Page 15: To Set Number Of Weekend Events (Programmable Models Only)

    Disable the feature Disposable Panel 1 month Washable Electrostatic 3 months Extended Media (Aprilaire) 6-12 months 6 or 12 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.
  • Page 16: Limited Warranty

    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. Research Products Corporation’s exclusive obligation under this warranty shall be to...

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