Airmax MaxAir 100e P2, Design, Installation And Maintenance Instructions

Page: 49 / 68

Page 49
Y & G OUTPUTS to EQUIPMENT - ON
W2 O/B
- ON
W1/EH OUTP
UT
- OFF
After 20 minutes;
G OUTPUT stay
s - ON
Y OUTPUT TURNS - OFF
W1/EH OUTPUT turns - ON
W2 O/B STAYS - ON
Summary: On a call for heat the compressor starts and the reversing valve is energized (heat
pump condensing unit reversing valve normally in the cool position). After 20 minutes the
compressor will stop and the back-up (hydronic heat) starts. The auxiliary heating relays close.
Only if the DIP settings are the same will there be no change in airflow.
Impact on unit control board 7235;
a. The X1 (or X2) relays activate for 20 minutes (depending on wiring). During the 20 minute
period, PWM will be at Y1 or Y2 value, again, depending on the wiring. For this reason do not
connect to X1 or X2 on the 7235.
b. The O state (ON) will be interpreted by the 7235 as “cooling” mode. Since the flows
programmed into the 7235 are SET the same for cooling or heating there will not be any
impact on blower operation.
c. After 20 minutes Z1 and the pump relay (A1) turns on and the X1/X2 relay will drop. This is
because of the W priority programmed into the 7235.
Zone Board DIP Switches Set to;
1. HEAT PUMP
2. DUAL FUEL
3. REV VALVE “O”
WITH “W” THE ONLY INPUT FROM THE THERMOSTAT TO THE ZONE CONTROLLER
The switch configuration results in the following output to the EQUIPMENT terminals
Y & G OUTPUTS to EQUIPMENT - ON
W2 O/B - OFF
W1/EH OUTPUT - OFF
After 20 minutes;
G OUTPUT stay
s - ON
Y OUTPUT TURNS - OFF
W1/EH OUTPUT turns - ON
W2 O/B STAYS - OFF
Summary: On a call for heat the compressor starts and the reversing valve is not energized (heat
pump condensing unit reversing valve normally in the heat position). After 20 minutes the
compressor stops and the back-up (hydronic heat) starts. The auxiliary heating relays close. Only
if the DIP settings are the same will there be no change in airflow.