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FOR THE INSTALLER
External connections to the heat pump
These are the external connections that must be made for the heat pump:
Power supply: The power supply is connected to terminals L1, L2, L3, N and PE. In
the event of a possible phase sequence fault the heat pump will trip the alarm “PHASE
SEQUENCE ERROR”. See more information in the section What to do if a fault occurs.
Mixing valve on the heating circuit: If a second heat curve with a mixing valve is to
be used, the mixing valve is connected to terminal block SV1.
External main pump in the heating system G1 (P1): The external main pump
should be connected to the terminal card in those cases a bypass is required. The
pump is connected to terminal P1.
Return sensor radiator T1 (GT1): Must always be connected. Connect to terminal
GT1.
Outdoor sensor T2 (GT2): Must always be connected. Connect to terminal GT2.
Hot water sensor T3 (GT3): Connected if the heat pump is to produce hot water.
Connect to terminal block GT3 X on the terminal card. On the C model this sensor is
already connected on delivery.
Mixing valve sensor T4 (GT4): Is connected when a mixing valve for a second heat
curve is to be used. Connect to terminal GT4.
Room sensor T5 (GT5): Connected if room sensor infl uence is required. Connect
to terminal block GT5 on the terminal card. The alarm lamp in the room sensor is
connected to the terminal block ALARM LED.
Mixing
valve
G1 (P1)
Terminal card
230 V
Return radiator
Outdoor sensor
Hot water
Mixing valve
Room sensor
Alarm lamp, room sensor
Terminal card
for external
connections
Connecting the heat pump to the power supply
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