Operating instructions

DHW heating with gas fired combi boilers
If the flow switch detects that hot
water is being extracted (> 3 l/min)
then the burner, circulation pump and
3-way valve are switched on or chan-
ged over. The burner modulates
according to the DHW outlet tempera-
ture and is limited by the temperature
limiter (82 °C) on the boiler side.
DHW heating with a gas fired boiler
The burner, the circulation pump and
the three-way valve are started or
changed over if the cylinder tempera-
ture lies 2.5 K below the set cylinder
temperature.
In the delivered condition, the set boil-
er water temperature is 20 K higher
than the set DHW temperature (adjus-
table via coding address "60"). The
burner will be switched OFF and the
circulation pump run-on time will
begin, if the actual cylinder tempera-
ture exceeds the set cylinder tem-
perature by 2.5 K.
Boosting DHW heating
The booster heating function is acti-
vated if a switching period is selected
for the fourth time phase.
The set temperature value for the
heating boost is adjustable in coding
address "58".
Weather-compensated control unit (cont.)
93
Function description
5692 672 GB