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

Page: 48 / 68

Page 48
WITH “W” THE ONLY INPUT FRO M 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 - ON
W1/EH OUT PUT - OFF
After 20 minutes
;
Y & G OUTPUTS stay
- ON
W1/EH OUTPUT turns - ON
W2 O/B STAYS
– O
n
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 continues to run and provide heat 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.
I
mpact on unit control board 72
35
;
a. T he 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. T he O state (ON) will be interpreted by the 7235 as “ cooling” mode, but only during the first 20
minutes. 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 “B”
WITH “W” THE ONLY IN PUT FROM THE THERMOSTAT TO THE ZONE CONTROLLER
The switch configuration results in the following output to the EQUIPMENT terminals