THERMEx THW20 - Page 40

Heat Pump Manual
40
SERVICE and MAINTENANCE
Controller Input and Output Schematic
Connector Type Control
Outputs – 1 to 8 across
the top of the board
24VDC 1 Compressor enable
2 Hot Gas defrost – circuit 1
3 Compressor 2 enable
4 Hot gas defrost enable – circuit 2
5 Fan enable
6 Master fault
7 Master Run
8 Pump enable
Inputs – 1- 24 across the
bottom of the board
IN1
IN2
IN3
IN4
IN5
IN6
IN7
IN8
IN9
IN10
0-10V Input
0-10V NC Input
0-10V NC Input
0-10V/ NTC thermistor
0-10V/ NTC thermistor
0-10V/ NTC thermistor
0-10V/ NTC thermistor
0-10V NC input
0-10V Input
0-10V input
Flow rate and flow switch
Compressor 1 fault
Compressor 2 fault
Return temp or evaporator temp
Process temperature storage tanks
Supply temperature
Discharge temperature circuit 2
Discharge temperature circuit 1
Suction pressure circuit 1
Suction pressure circuit 2/ Discharge pressure circuit 1