2. OFFSET

All thermostats are factory calibrated to be accurate to within ±1° of true temperature. An offset is available to allow for agreement with field temperature measuring instruments. The value set will be added to the temperature sensed by the thermostat. The result will be displayed on the thermostat and will be used as the control value.

To change the offset:

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 “SET OFFSET” and press the SELECT button.

4.To cancel, press the BACK button.

5.To change the offset value, press the ▲ or ▼ button to raise or lower the setting between –4° and +4° (°F or °C).

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

3. PROGRESSIVE RECOVERY

Progressive Recovery causes the thermostat to bring on the heating/cooling equipment before the programmed event start time, in order for the temperature to be at the programmed value by the programmed time. The feature can be turned on or off. When turned off, the heating/cooling equipment will not begin bringing the space temperature to the programmed value until the start of the event.

To turn Progressive Recovery on or off:

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 “PROGRESSIVE RECOVERY” and press the SELECT button.

To cancel, press the BACK button

To change whether Progressive Recovery is on or off, press the ▲ or ▼ button to highlight either ON or OFF.

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

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Aprilaire Model 8570 installation instructions Offset, Progressive Recovery, Display will show the ADV. Settings Menu