Marvair MAA/MGA Wall Mount AC Installation & Operation Manual
09/2021 Rev.15
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Brand of Sensor Selection (W3 jumper)
Honeywell enthalpy and dry bulb sensors are currently the only brand of sensors used in the air conditioners.
Jumper W3 allows us to use alternative brands at a future date. On all current air conditioners, pins 1
& 2 are jumpered on W3. See item 4 in Figure 4.
Figure 3. Enthalpy Sensor Temperature Control Points
Marvair Economizer Controller
Figure 4. Electrical Controls, MAA Alternate Construction
