Aprilaire Event-Based 8620 - Air Cleaning Control Manual

ABOUT YOUR NEW DEVICE

Do not use sharp instruments to press touch screen. Only use your fingertips.

PRODUCT FEATURES

• Indoor air quality control.
  • Humidification automatic or manual control.
  • Dehumidification.
  • Event-Based air cleaning.
  • Ventilation with temperature and humidity limits.

Note: The 8620 can only control one of the following per installation: ventilation, whole home dehumidifier or humidifier.

• Temperature control.
• Heat Blast raises the room temperature 3°F to 5°F.
• Large touch screen with adjustable backlight – constant backlight available.
• Message center provides feedback, instructions and service reminders.
• 7 day programmability or separately programmable weekday/weekend schedules.
• User interface can be removed from the wall for easy programming (batteries must be installed).
• 24VAC or battery powered, with front battery door access for fast, easy replacement.
• Displays room temperature, room humidity, temperature setting, and outdoor temperature.
• Programmable fan control with fan circulation mode.
• Easy to use temperature control can override program schedule at any time.

CONTROLS & DISPLAY OVERVIEW

HOME SCREEN

NOTES: BACKLIGHT IS ACTIVATED WITH FIRST BUTTON PRESS AND AUTOMATICALLY TURNS OFF.
NOT ALL BUTTONS WILL BE DISPLAYED IN EVERY INSTALLATION.

MAIN MENU

OPERATION

SELECT SYSTEM MODE

(EM HEAT/HEAT/OFF/COOL /AUTO)
Press [MODE] to select:
EM HEAT: (only for heat pumps with auxiliary heat)
Thermostat controls auxiliary heat. Heat pump will not operate in EM HEAT mode.
HEAT: Thermostat controls only the heating system.
OFF: Heating and cooling systems are off.
COOL: Thermostat controls only the cooling system.
AUTO: (if enabled in installer setup) Thermostat automatically selects heating or cooling depending on the indoor temperature.
Press [DONE] to save and exit, Or [CANCEL] to exit without saving. The thermostat will save and exit if nothing is pressed within 10 seconds.

CHANGE TEMPERATURE SET POINT

Press or to adjust the current set point. (See Program Schedule Holds for more information.)

SELECT FAN SETTING

(ON/AUTO/CIRC)
When the fan mode is changed during a program event it remains in that mode until the next event starts. The fan must be programmed to FAN ON in the schedule to run continuously through all events.

Press [FAN] to select:
ON: Fan runs continuously. Use this mode for maximum air circulation/filtering.
AUTO: Fan runs only when the heating or cooling system is on.
CIRC: Same as AUTO, but ensures the fan is on for at least 30 minutes per hour. Use this mode for a balance of energy savings and air circulation/cleaning.
Press [DONE] to save and exit, Or [CANCEL] to exit without saving. The thermostat will save and exit if nothing is pressed within 10 seconds.

CLEAN SCREEN

Press [MENU] to enter the main menu.
Press [CLEAN SCREEN] to disable the touch screen for 30 seconds for cleaning.
Note: Use a soft damp cloth to clean the screen. Use water or household glass cleaner. Do not spray liquids directly on the screen.

MAINTENANCE REMINDERS

Maintenance reminders are set up by the installer to indicate when the equipment is due for service. If a maintenance reminder is displayed, call your HVAC dealer for service. They can be cleared by pressing [MENU] to enter the main menu. Press and select YES to service reminders and then press [Next]. Press and to select YES for each reminder you would like to reset. Press [Next] to go to the next reminder or [Back] to go to a previous reminder. Press [DONE] to reset the selected service reminders.

SCREEN LOCKOUT

The user can disable certain features of the thermostat. (see User System Setting Table for details.) This feature can be overridden by pressing and holding [MENU] for 7 seconds.

BATTERY INSTALLATION

The thermostat can be battery powered, AC powered or both. when wired for AC power, the batteries are optional and only provide back-up power to the clock.
The thermostat has a memory backup that saves the thermostat's settings in case of a power interruption. The system settings will be retained but the clock will reset after 90 seconds with no battery or AC power.
The reset button located under the battery cover can be used to reset the thermostat to factory defaults.

The reset button should only be used by the installer.

INDOOR AIR QUALITY FUNCTIONS

EVENT-BASED AIR CLEANING

Press [AIR CLEANING] on the Home screen to enter the Air Cleaning screen.

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 installed, air cleaning will still occur during normal fan operation during heating, cooling or other indoor air quality events.

Constant Clean: This option will provide the maximum amount of air cleaning available. The air cleaner will be active for 24 hours a day, seven days a week.

Automatic: The air cleaner will run a minimum of 30 minutes every hour. The air cleaner will monitor the amount of time your heating and cooling system runs; if 30 minutes is not reached the air cleaner will automatically turn on. This will maximize the amount of air cleaning while minimizing energy consumption.

Event Clean (3 hour cycle): When selected, the air cleaner will run for 3 hours continuously and then return to the most recent mode of Off, Automatic, or Constant Clean. This option only cleans the air when needed; an example would be after vacuuming.

Allergies (24 hour cycle): When seasonal allergies spike and outside air quality is at its worst, choose this option. your air cleaner will run continuously for 24 hours, then return to the most recent mode of Off, Automatic, or Constant Clean.

Note: The thermostat will manage fan and air cleaning selections when the selections overlap.

HUMIDITY CONTROL

Press [HUMIDITY CONTROL] on the Home screen to enter the Humidity Control screen.

The Humidity Control screen is used to access control for both humidification and dehumidification.
If humidification is installed it can be controlled in two modes, automatic or manual.
Automatic or manual mode is configured by the installer. To determine which mode the thermostat is set to, see the diagrams below.

In automatic mode you will receive the optimum amount of humidity so that your home and its furnishings are protected from the damaging effects of excess condensation or low humidity during heating season. The thermostat automatically adjusts your home's relative Humidity based on the outdoor temperature.

Humidity Control Screen for Humidification in Automatic Mode

The humidity setting needs to be set initially to meet your home's conditions. Please follow these steps when adjusting your thermostat.

1. Adjust the humidity setting to "3" which is within normal range. During the next 24-48 hours it may be necessary to adjust the setting for more or less humidity, depending on your personal comfort and home's requirements.
2. During the coldest portion of the first heating season, minor adjustments may be necessary. This is dependent upon your home's construction.

The relative Humidity in your home will now be accurately controlled to meet your needs and should not need further adjustment during future heating seasons.

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 table to determine the proper Relative Humidity setting.

Humidity Control Screen for Humidification in Manual Mode

If dehumidification is installed the thermostat can be configured, through the installer set-up, to control dehumidification with either a whole home dehumidifier or with the air conditioner (cooling unit).
The thermostat will allow you to set the desired humidity (% relative Humidity) level in your home and can be used to turn the dehumidification On or Off.
Use the dehumidification adjustment to set the dehumidification setpoint to 60% when first installed. Allow dehumidification to run until the initial setpoint is reached, before deciding if you want to change the humidity setting.

Humidity Control Screen with only Dehumidification Installed

Raise the setting if you prefer the air to be less dry; this will reduce the amount of time that dehumidification runs.

Lower the setting if you prefer the air to be more dry; this will increase the amount of time that dehumidification runs.

Your comfort is the best measure of how to adjust your setting. When first installed, your dehumidifier has to remove all the moisture that is initially in your home. The home acts like a sponge so the moisture in the materials of your home is at the same level as the air. After drying the air, the materials of the home will release the moisture back into the air until they are again at the same level. As a result, it is not uncommon for dehumidification to operate for an extended period of time when it is first installed.

Energy Saving Tip #1:
Adjust the setting to be as high as is comfortable to reduce dehumidification run time – if it feels clammy or smells damp or moldy lower the setting. To save energy, turn the dehumidifier control OFF when you open your windows just as you would with air conditioning.

Energy Saving Tip #2:
If vacating your home for an extended period in the summer, set the Relative Humidity at 60% and set the cooling setpoint as high as you are comfortable setting it to in cooling mode. Consult with appropriate professionals regarding the highest temperature that is safe for your pets or possessions. This will keep the humidity at a controlled level to help prevent mold while minimizing the amount of the cooling energy used. Vacation hold is a convenient way to adjust the dehumidification and cooling setpoint when you will be away.

If dehumidification is done with the air conditioner, the thermostat will cool up to 3°f beyond the cooling setpoint for dehumidification. note overcooling may not be sufficient to meet the dehumidification setpoint.

FRESH AIR

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: Ventilation will not run.
Automatic: Ventilation will cycle based on the parameters set by the installer to meet your home's ventilation requirements.
3 Hour Event: Ventilation will be constantly energized for 3 hours and then the fresh air mode will return to Off or Automatic depending on which was mode was most recently active. This option is used when fresh air is needed. An example would be after cooking.
24 Hour Event: Ventilation will be constantly energized for 24 hours and then the fresh air mode will return to Off or Automatic depending on which was mode was most recently active. This option is used when a large amount of fresh air is desired. An example would be a day with desirable outdoor conditions.

Fresh Air Screen

PROGRAM SCHEDULE AND HOLDS

SET TIME AND DATE

Press [MENU] to enter the main menu.
Press [SET CLK/DATE] to enter clock menu.

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 exit, Or [CANCEL] to exit without saving. The thermostat will save and exit if nothing is pressed within 20 seconds.

UNDERSTANDING PROGRAM SCHEDULES

The daily schedule is split into four sections:
WAKE: temperature you would prefer to wake up to.
LEAVE: temperature when you are away from the house.
RETURN: temperature you would prefer to return home to.
SLEEP: temperature you would prefer while sleeping.

The times shown in the table below are the defaults. The start time and temperature of each section can be changed to fit your schedule. (See Changing Program schedules section)
This thermostat is pre-set to use the following program settings (see table below). we recommend these settings, since they can reduce your heating/cooling expenses. The fan program is pre-set to AUTO for all events.

Optionally, the thermostat can be set to a two event schedule. (See Setup Menu)

PROGRESSIVE RECOVERY

The Progressive Recovery feature allows the thermostat to activate the heating and cooling equipment PRIOR to a scheduled event in order to reach the desired temperature at the start of that scheduled event.
Example: If the WAKE time is 6 am, and the temperature is 70°, the heat will come on before 6 am, so the temperature is 70° by the time you wake at 6 am.

CHANGING PROGRAM SCHEDULES

Press [MENU] to enter the main menu.

Press [SET SCHEDULE] to enter schedule programming.

Press or to select the day.

Note: This step is not displayed for weekday/weekend schedules.

Press [Next], then or to set the start time of the first event.

Press [Next], then or to set the setpoints of the first event.

Press [Next], then [FAN] to set the fan mode of the first event.

Press [Next] to advance to the next event
Repeat above process for each remaining event.
Press [DONE] to save the schedule for the day.

The thermostat will display the COPY option.

Press [COPY] to copy the schedule of the day just programmed to any other day.
OR
Press [CANCEL] to proceed to the next day and repeat the above process.

HEAT BLAST

Heat Blast will raise the current room temperature 3°F to 5°F based on the installer set-up, and then resume normal operation.

Press [Heat Blast] to activate Heat Blast.
Note: Heat Blast button is only available if it is enabled in the Installer Setup and the thermostat is in Heat or Emergency Heat mode.

To cancel Heat Blast press [CANCEL], or [Heat Blast], or the temperature adjust buttons.

PROGRAM SCHEDULE HOLDS

TEMPORARY PROGRAM HOLD

Press or to immediately adjust the temperature when the schedule is running. This will temporarily hold the temperature setting until the next scheduled event.

Press or to adjust the end time of the hold. If end time is not adjusted, the Temporary Hold will end at the start of the next event.

To cancel the Temporary Hold, press [CANCEL HOLD].

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. With the thermostat in Permanent Hold, the temperature setting and fan mode can be adjusted and will stay at that setting until the hold is cancelled.

To cancel the Permanent Hold, press [CANCEL HOLD].

VACATION PROGRAM HOLD

This energy saving feature allows you to suspend the programmed schedule for extended periods of time. The temperature and dehumidification setpoint (optional) you select will be maintained 24 hours a day until the vacation program hold end date and time. Once the end date and time have been surpassed, the previously programmed schedule will resume. If you return earlier than expected, press [CANCEL HOLD] to resume the programmed schedule.

Press [MENU] to enter the main menu.

Press [SET VACATION] to enter vacation program hold.

Press or to adjust the temperature setting.

Press [NEXT], then adjust the dehumidification setting.
Note: If dehumidification in vacation mode is not enabled this step will be skipped.

Press [Next], then [FAN] to set the fan mode.

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.

SETUP MENU

HOW TO ENTER THE SETUP MENU TO CHANGE SETTINGS

Press [MENU] to enter the main menu.

Press [SETUP] to enter the setup menu.

Press [Next] or [Back] to page through the settings (the setting is displayed in the message center).

Press or to adjust the setting. (selected option flashes.)
Press [DONE] to save and exit, Or [CANCEL] to exit without saving.
The thermostat will discard changes and exit if nothing is pressed within 60 seconds.

USER SYSTEM SETTINGS TABLE

The following table is the list of the settings and their details. Default settings are shown in bold.

WARRANTY REGISTRATION

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 name, address, phone number, product purchased and date of purchase to: Research Products Corporation, P.O. BOX 1467, Madison, WI 53701

Documents / Resources

References

• AprilAire Home

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