Protection Menu / 8.4 - Overload Protection
If the electric heating spiral for DHW (relay R1) and the electric heating spiral for space heating (relay R2) are connected to the same electrical phase, and the current capacity of that phase is lower than the sum of the current draws of both spirals, an overload may occur, triggering the circuit breaker.
Enabling the option will cause that, in the event of a request to activate both relays R1 and R2, relay R2 (electric heating for space heating) will remain off for the entire duration of the request for relay R1 (DHW electric heating). Thus, DHW heating takes precedence.