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C6 controller connections

  1. MODBUS A - communication signal A for MODBUS
  2. MODBUS B - communication signal B for MODBUS
  3. Y - 0-10VDC control signal output for hot water mixing valve actuator
  4. GND - ground for hot water mixing valve actuator
  5. +24V - +24VDC power supply for  hot water mixing valve actuator
  6. Y - 0-10VDC control signal output for cold water mixing valve actuator OR modulating DX unit
  7. GND - ground for cold water mixing valve actuator OR modulating DX unit
  8. +24V - +24VDC power supply for cold water mixing valve actuator
  9. Y - 0-10VDC used for external preheater
  10. GND - ground for external preheater
  11. +24V - +24VDC power supply (can be used for second panel)
  12. NTC - connection for supply air sensor (B1)
  13. NTC - connection for supply air sensor (B1)
  14. NTC - connection for return hot water sensor (B5)
  15. NTC - connection for return hot water sensor (B5)
  16. C - common connection for HEATING, COOLING, ALARM voltage free signals
  17. NO - normally open, voltage free HEATING signal for DX unit.
  18. NO - normally open, voltage free COOLING signal for DX unit
  19. NO - normally open, voltage free ALARM signal
  20. L - 220V power supply for hot water pump.
  21. N - neutral for hot water pump.
  22. IN1 - digital input (voltage free) to activate "Override" mode (NORMALLY OPEN)
  23. IN2 - digital input (voltage free) to activate "Kitchen hood" mode (NORMALLY OPEN)
  24. IN3 - digital input (voltage free) to activate "Fireplace" mode (NORMALLY OPEN)
  25. IN4 - digital input (voltage free) for fire system (NORMALLY CLOSED)
  26. GND - ground
  27. GND - ground

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