Function
Hold time/interruption
Recharging/heat request
Function
Setpoint
If activation occurs via the time program LEG05 THM.DISINF.TIMEPRO-
GRAM, the circulation pump is activated and the station control is
deactivated. Monitoring and safeguarding of the temperature must be
done externally.
This mode is maintained for the duration of the defined time slot. The
circulation pump is only stopped if the domestic hot water tempera-
ture is
once the time slot has elapsed.
Request for heat on the primary side, with an additional sensor in the
heat source:
If the temperature at the tank top sensor TO1 is lower than the cur-
rent setpoint PRI02 TANK TOP SETPOINT TEMP, recharging is activated
or heat is requested. If the current setpoint plus NAC03 SWITCH ON
RECHARCHING is exceeded at the tank top sensor TO1, recharging is
blocked or the heat request is cancelled. Recharging can also be
restricted via a time program.
n T1O < T1Oset, then NALAD active.
n T1O> T1Oset + NAC03 SWITCH ON RECHARGING, then NALAD
blocked.
n T1Oset (normal operation) = BAS01 DHW TEMP.SETPOINT + DIFF.
n T1Oset (legionella protection) = LEG01 TEMP TERM. DISINFECTION +
DIFF.
If there is active communication in the eBUS network, the recharging
setpoint relayed is PRI02 TANK TOP SETPOINT TEMP plus 5 K.
Dynamic temperature difference
DIFF is a dynamically calculated temperature differ-
ence that is required between the primary and sec-
ondary side of the plate heat exchanger in order to
reach the desired domestic hot water temperature at
the current flow rate.
Communication
03/2024 Item no. 215790 EA no. 1321
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