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Set-back difference
by set-back of the current flow temperature.
The amount of time in which the priority for the DHW circuit is given is set in the
Priority in case
of deviation
parameter.
Function
WE Configuration
Priority for
DHW circuit
OFF
10 min
FB8 = ON, Ab
Priority in case of deviation / 2to 10 min
6.10 Forced charging of the DHW storage tank (Anl 2, 3, 5, 7, 8 and 9)
This function is always configured when the system has at least one storage tank sensor.
To provide the full room heating performance when the time-of-use of the heating circuits be
-
gins, existing storage tanks are charged one hour before the time-of-use of the heating circuits
starts.
6.11 Thermal disinfection of the DHW storage tank
In all systems with DHW heating, the DHW storage tank is thermally disinfected on a selected
day of the weekor every day. The storage tankis heated up to 70°C. Thermal disinfection starts
at 0.00h and finishes at 4.00h at the latest.
Thermal disinfection for preventing legionella infection causes
4
high return flow temperatures during the disinfection cycle (return flow temperature limita-
tion suspended),
4
high storage temperatures after thermal disinfection has been concluded,
4
lime scale (possibly), which can have a negative effect on heat exchanger performance.
Note!
This function is not available when a storage tank thermostat is used.
Function
WE Configuration
Thermal disinfection OFF
3 (Mi)
FB7 = ON
Day of the week / 1–7 = daily, 1, 2 to 7 = Mon, Tue to Sun
56 EB 5476 EN
Functions of the DHW circuit