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Connecting to the power supply
External connections Accessory unit
Power supply:
Connected to terminals L, N and PE.
CANbus:
Communication cable between the circuit boards in the control
cabinet, heat pump and accessory unit. Connect to terminals GND,
CANL, CANH and 12V. See more under section CANbus.
Q2, Mixing valve:
Connect to terminal Do2 (Open), N (Zero) and Do3 (Close).
H1, Any additional heat alarm:
Closing during operation causes alarm Fault on additional heat for
heating system.
Do1, Starting additional heat:
Connect the cable to electric or oil-fi red boiler contactor. Only connect
when a hot water heater is included. NOTE: Maximum relay output
load, 1800W resistive, 600W inductive. At greater loads, an
intermediate relay must be installed, not included.
Warning
Do not mix up the 12V and CAN-
bus connections! If 12V (or other
incorrect voltage) is supplied to the
CANbus contacts, the processors in the
CANbus are destroyed.
To Control cabinet
Strap
Open
Close
Note
S1 must be in position Term here and on
the IOB circuit board in the heat pump.
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