Immergas MAGIS M4-30 Use And Installation page 97

9) For SMART GRID:
The unit has the smart grid function, there are two ports on the PCB to connect the SG signal and the EVU signal as follows:
1. When the EVU contact is closed and the SG contact is closed, as long as DHW mode is set in a valid way, the heat pump
gives DHW mode priority and the temperature setpoint of the DHW mode switches to 70°C. If T5<69°C, the TBH is ac-
tive, T5>70°C, the TBH is not active.
2. When the EVU contact is closed and the SG contact is open, as long as DHW mode is set in a valid way and the mode
is active, the heat pump gives DHW mode priority. If T5<T5S-2, the TBH is active, if T5≥T5S+3, the TBH is not active.
3. When the EVU contact is open and the SG contact is closed, the unit runs normally.
4. When the EVU contact is open and the SG contact is open, the unit runs as follows: the unit will not work in DHW mode
and the TBH will not be valid; the disinfect function will not be valid. The maximum operating time for cooling/heating
is "SG RUNNING TIME", then the unit will switch off.
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