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Marvair Wall Mount H/P MAA1020H-1048H/MGA1072H I&O Manual
02/2021 Rev.2
Wires from temperature
sensor mounted in
supply air.
Figure 6 - Temperature Sensor Wires
2. Turn the unit on and the Hot Gas Reheat is operating.
3. Set the digital VOM for DC milliamp voltage. The milliamp voltage shown on the meter’s
display corresponds to the desired air temperature (ºF). Insert the probes of the meter into the
negative (black) and positive (red) set point test terminals on the board. Carefully, and in small
increments, turn the blue knob on the potentiometer until the volt meter displays the desired
milliamp voltage (temperature). Airxcel Commercial Group recommends 70ºF and no lower
than 68ºF and no higher than 78ºF. Allow the refrigerant system to stabilize for at least five
minutes and adjust the temperature as desired.
Adjustment Knob
Positive (Red)
Negative (Black)
Figure 7 - Desired Temperature Set Point
