Marvair MAA1018A - Figure 5. Economizer Control Board

20
Marvair MAA/MGA Wall Mount AC Installation & Operation Manual
12/2021 Rev.16
1 2 3 4
5
6
7
89
1. W1 Economizer Sensor Selector
Jumper Pins 1 & 2 for enthalpy sensor
Jumper Pins 2 & 3 for dry bulb sensor
4. W3 Sensor Brand Selector
Jumper Pins 1 & 2 for Honeywell sensor
Jumper Pins 2 & 3 for Prism sensor
7. Minimum Position Potentiometer
0% to 100%. Factory setting is 50%.
2. Field connection from
CommStat 4 (2) terminal
5. For Honeywell sensors 8. W2 Minimum Position
Potentiometer Jumper
Jumper Pins 1 & 2 to Disable (Factory setting)
Jumper pins 2 & 3 to Enable
3. Field connection from CommStat 4
(MAR) terminal
6. For Prism sensors 9. Enthalpy Dip Switches
Set points are same as previous
Honeywell controller.
Factory setting is 4 (63°F/17.2°)
1=A (73°F/23.8°C) 2=B (70°F/21.1°C)
3=C (67°F/19.4°C) 4=D (63°F/17.2°)
Figure 5. Economizer Control Board