External Connections To The Heat Pump - Bosch EHP 6-11 LW User And Installation Manual

External connections to the heat pump

These are the external connections that must be made for the heat pump:
Power supply 3-phase: 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 3-phase incorrect.
See more information in the section What to do if a fault occurs.
Power supply 1-phase: The power supply is connected to terminals L, N, and PE.
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 must 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): Is connected if the heat pump is to produce hot water. Connect
to terminal block GT3 X on the terminal card. On the LW 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): Is connected if room sensor infl uence is required.
Alarm lamp, room sensor
Terminal card
for external
connections
63
Connecting the heat pump to the power supply
Terminal card
230 V