8. BLOWER EXTENSION FOR HUMIDITY CONTROL

If the heating equipment has not run long enough to allow the humidifier to meet the humidity demand, the thermostat will continue the blower after a heat call. One second before the thermostat turns off the heating terminal(s), the fan terminal will be energized thus extending blower operation. If the fan terminal was on as part of the heat call it will remain on, if it was not on it will be turned on. The thermostat will operate the blower for no less than 5 minutes after the heat call and not more than 15 minutes. This will allow the humidifier to continue to put moisture in the air to satisfy the humidity demand. This feature can be enabled or disabled and can only be used when an ADHC is part of the installation.

Note: To take full advantage of this feature, the humidifier must be plumbed to hot water.

To enable blower extension:

1.Make sure the thermostat is in the OFF mode.

2.Press and hold both the ▲ and ▼ buttons for 3 seconds.

– The display will show the ADV. SETTINGS MENU.

3.Use the ▲ or ▼ button to highlight “BLOWER EXTENSION” and press the SELECT button.

4.To cancel, press the BACK button

5.To change whether Blower Extension is enabled (on) or disabled (off), press the ▲ or ▼ button to highlight either ON or OFF.

6.To finish and return to the ADV. SETTINGS MENU, press the SELECT button.

9.MONITORS – AIR FILTER, SERVICE HUMIDIFIER, UV LAMP, SERVICE HVAC

The thermostat monitors time and can display scheduled reminders for the user to service their humidifier, change their filter and UV lamps, and to remind the user to schedule an HVAC system maintenance check. All monitors are strictly time based, so setting a filter monitor to three months will result in the change reminder being displayed in three months, regardless of how much the HVAC system has run in that period. All monitors can also be turned off for installations where one or more of the components may not be installed. When the thermostat has verified that a monitor setting has been reached, a message is displayed on the thermostat

(at the message center location where date and time are normally displayed) and the label for the multi-function button normally labeled INFO changes to CALL DEALER.

To set humidifier, filter, UV and HVAC service reminder schedules:

1.Press the MENU button.

2.Use ▲ or ▼ button to highlight SETTINGS, then press the SELECT button. Press the BACK button to cancel.

3.Use ▲ or ▼ button to highlight MONITORS, then press SELECT. Press BACK to cancel.

4.Use ▲ or ▼ button to highlight the monitor you wish to set (AIR FILTER, SERVICE HUMIDIFIER, UV LAMP or SERVICE HVAC) then press the SELECT button. Press the BACK button to cancel.

5.Use ▲ or ▼ button to highlight the amount of time you wish to set then press the SELECT button. Press the BACK button to cancel.

6.Pressing the SELECT button, after setting the schedule, takes you back to the MONITORS screen.

To set additional reminder schedules return to step 3.

To finish, press the BACK button three times to return to normal operation.

To reset an active monitor:

1.Press the CALL DEALER button.

2.Press the RESET button.

3.This will reset the monitor and return you to the Main Screen.

Important: When an ADHC is installed with the thermostat, either directly or as part of a Model 6504 Intelligent Zoned Comfort System, the service humidifier monitor will automatically be set to AUTO. AUTO is not a choice unless an ADHC is present. Set to AUTO, the ADHC will initiate “service humidifier” based on humidifier type and run time.

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Aprilaire 8570 installation instructions Press the Menu button, Press the Call Dealer button Press the Reset button