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External connections Optima
Power supply:
Connect to terminals L1, L2, L3, N and PE. It is important that the
phase sequence is the same as in the electric boiler.
CANbus:
Communication cable between the heat pump and electric boiler.
Connect to terminals GND, CANL, CANH and 12V. See more under
section CANbus.
E4, Heating cable:
The drainage pipe from the heat pump’s discharge water vessel may
need to be fi tted with a heating cable. The heating cable is connected to
terminals Do4, N. See section Accessories/Options.
External connections
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.
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