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Aprilaire 8620 - page 1
Model 8 6 2 0 Thermostat with Event-Based ™ Air Cleaning and Humidity or V entilation Control READ AND SAVE THESE INSTRUCTIONS Ow ne r ’ s Man u al Includes Operating Instructions and Warranty Information ...
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Aprilaire 8620 - page 2
2 3 WARNING Do not use sharp instruments to press touch screen. Only use your fingertips. Thermostat features ........................... 3 Controls & display overview ................... 4-5 T ABLE OF CONTENTS ABOUT YOUR NEW THERMOST A T OPERA TION INDOOR AIR QUALITY FUNCTIONS Select system mode (EM HEA T/HEA T/OFF/COOL/AUTO) ................ ...
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Aprilaire 8620 - page 3
4 5 CONTROLS & DISPLA Y OVERVIEW – HOME SCREEN ABOUT YOUR NEW THERMOST A T CONTROLS & DISPLA Y OVERVIEW – MAIN MENU ABOUT YOUR NEW THERMOST A T NOTES: ? ...
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Aprilaire 8620 - page 4
6 7 OPERA TION Press [MODE] to select: EM HEA T : (only for heat pumps with auxiliary heat) Thermostat controls auxiliary heat. Heat pump will not operate in EM HEA T mode. HEA T : Thermostat controls only the heating system. OFF: Heating and cooling systems are off. COOL: Thermostat controls only the cooling system. AUTO: ...
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Aprilaire 8620 - page 5
8 9 OPERA TION MAINTENANCE REMINDERS ? ...
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Aprilaire 8620 - page 6
10 11 INDOOR AIR QUALITY FUNCTIONS Press [AIR CLEANING] on the Home screen to enter the Air Cleaning screen. If installed, air cleaning can operate in five different modes. Air cleaning will activate the fan for the purpose of air cleaning. Off: The air cleaner will not call the fan for the purpose of air cleaning. Note: If air cleaning is installe ...
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Aprilaire 8620 - page 7
12 13 INDOOR AIR QUALITY FUNCTIONS Press [HUMIDITY CONTROL] on the Home screen to enter the Humidity Control screen. The Humidity Control screen is used to access control for ? ...
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Aprilaire 8620 - page 8
14 15 INDOOR AIR QUALITY FUNCTIONS HUMIDITY CONTROL (CONTINUED) In manual mode it is important to anticipate a drop in outdoor temperature and reduce the setting accordingly to avoid excessive condensation. Use the following ? ...
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Aprilaire 8620 - page 9
16 17 INDOOR AIR QUALITY FUNCTIONS HUMIDITY CONTROL (CONTINUED) If dehumidification is installed the thermostat can dehumidification with either a whole home dehumidifier or with ...
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Aprilaire 8620 - page 10
18 19 INDOOR AIR QUALITY FUNCTIONS Humidity Control Screen with only Dehumidification Installed HUMIDITY CONTROL (CONTINUED) DONE BUTTON ? ...
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Aprilaire 8620 - page 11
20 21 INDOOR AIR QUALITY FUNCTIONS Press [FRESH AIR] on the Home screen to enter the Fresh Air screen. If ventilation is installed, Fresh Air can operate in four different modes. Off: V entilation will not run. Automatic: ? ...
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Aprilaire 8620 - page 12
22 23 PROGRAM SCHEDULE AND HOLDS Press [MENU] to enter the main menu. Press [SET CLK/DA TE] to enter clock menu. SET TIME AND DA TE Press or to set the hour . Press [Next] , then or to set the minute. Press [Next] , then or to set the month. Press [Next] , then or to set the day . Press [Next] , then or to set the year . Press [DONE] to save and ex ...
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Aprilaire 8620 - page 13
24 25 Event designator Start time Set temperature Fan Heat Cool W AKE LEA VE RETURN UNDERST ANDING PROGRAM SCHEDULES (CONTINUED) PROGRAM SCHEDULE AND HOLDS ? ...
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Aprilaire 8620 - page 14
26 27 PROGRAM SCHEDULE AND HOLDS Press [Next] , then [FAN] to set the fan mode of the first event. CHANGING PROGRAM SCHEDULES (CONTINUED) Press [Next] to advance to the next event. Press [DONE] to save the sc ...
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Aprilaire 8620 - page 15
28 29 PROGRAM SCHEDULE AND HOLDS PERMANENT PROGRAM HOLD Press [HOLD] to permanently hold the temperature at its current setting while the schedule is running. This will override the temperature settings for all events. ? ...
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Aprilaire 8620 - page 16
30 31 PROGRAM SCHEDULE AND HOLDS Press [Next] , then or to set end date. Press [Next] , then or to set end time. Press [DONE] to save and exit, Or [CANCEL] to exit without saving. The thermostat will save and exit if nothing is pressed within 20 seconds. PROGRAM SCHEDULE HOLDS – V ACA TION (CONTINUED) Press [Next] , then [FAN] to set the fan mode ...
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Aprilaire 8620 - page 17
32 33 USER SYSTEM SETTINGS T ABLE SETUP MENU bold . ...
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Aprilaire 8620 - page 18
34 Visit us on-line at www .aprilaire.com to register your Aprilaire product. If you do not have on-line access, please mail a postcard with your ? ...
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Aprilaire 8620 - page 19
www.aprilaire.com 10009856 4.12 B2205747B ...
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