McQuay MWH

MCQUAY Service Guide Book Controller Configuration
33
6.0 CONVERSION CONFIGURATION
6.1 Auxiliary Heater Conversion
U1.5 Heatpump with Auxiliary Heater
To convert the standard U1.5 heatpump PCB to
auxiliary heater application, the following
components need to be added onto the PCB:
1. Heater relay (240V/20A)
2. Transistor, 2SC945
3. Diode, IN4003
Board U1.5 Heatpump with Auxiliary Heater
Heater Relay
(RLY 8)
Transistor
(Q3)
Diode
(
D17
)