Table A3 - Control Board Connector Descriptions (Bottom) - Maritime Geothermal Nordic PC Series Installation And Service Manual

TABLE A3 - Control Board Connector Descriptions (Bottom)

Name Description
GND BACnet MS/TP
B BACnet MS/TP
A BACnet MS/TP
STAGE1 Compressor Stage 1
STAGE2 Compressor Stage 2
RV_#1 Reversing Valve #1
RV_#2 Reversing Valve #2
SOL#1 Solenoid#1 (NC#1)
SOL#2 Solenoid#2
24VAC Power supply for board
COM Power supply for board
AI_5 Analog In Channel 5
AI_4 Analog In Channel 4
AI_3 Analog In Channel 3
AI_2 Analog In Channel 2
AI_1 Analog In Channel 1
AI_0 Analog In Channel 0
GND Ground pin
GND Ground pin
5VDC Power for analog sensors
12VDC Power for analog sensors
24VDC Power for analog sensors
A MODBUS
B MODBUS
GND MODBUS
ISSUE 03: 1-Oct-2021
Ground for shield if required.
RS-485 for BACnet communication.
RS-485 for BACnet communication.
Starts / stops the compressor.
Not used.
Off in pool heat mode, energized in air reheat or heat rejection modes.
Off in pool heat mode or air reheat modes, energized in heat rejection mode.
Off in pool heat mode or air reheat modes, energized in heat rejection mode.
Not used.
24VAC power for control board.
GND for control board.
Optional pool water external sensor (type 3 or 7 10k thermistor).
0 to 5VDC or 4-20mA user settable with board jumper.
0 to 5VDC or 4-20mA user settable with board jumper.
0 to 5VDC or 4-20mA user settable with board jumper.
0 to 5VDC or 4-20mA user settable with board jumper.
Optional compressor current sensor.
Ground for analog sensors.
Ground for analog sensors.
5VDC power supply for sensors.
12VDC power supply for sensors.
24VDC power supply for room sensor/user interface (room thermostat).
RS485 communication for room sensor/user interface (room thermostat).
RS485 communication for room sensor/user interface (room thermostat).
Ground for shield if required.
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