Operating instructions

Heating the DHW storage cylinder from cold
The heating circuit pump is switched
ON and the three- way diverter valv e
will be changed over, if the cylinder
primary temperature sensor captures
a temperature lower than the set tem-
perature.
&
At a boiler water temperature ≥ set
DHW temperature, the cylinder pri-
mary pump will be switched ON.
&
At a boiler water temperature ≤ set
DHW temperature, the burner will
be switched ON and, after the
required boiler water temperature
has been reached, the cylinder pri-
mary pump will be switched ON.
Thecylinderisthenheateduptothe
set DHW temperature. Heat ing stops
when the set temperat ure has been
reached at the cyl inder primary tem -
perature sensor and at the outlet tem-
perature sensor.
After heating, the cyl inder primary
pump and the three-way diverter
valve remain ON for a further 30 s.
Reheating when DHW is drawn off
When DHW is drawn off, cold water
enters at the bottom of the cylinder.
The heating circu lation pump is
switched ON and the three-way diver-
ter valve is change d over, if the cylin-
der primary temperature s ensor
captures a temperature lower than the
set temperature.
&
At a boiler water temperature ≥ set
DHW temperature, the cylinder pri-
mary pump will be switched ON.
&
At a boiler water temperature ≤ set
DHW temperature, the burner will
be switched ON and, after the
required boiler water temperature
has been reached, the cylinder pri-
mary pump will be switched ON.
The DHW is regulated to the s et tem-
perature via the cylinder primary tem-
perature sensor.
The cylinder continues to be heated
up after the draw-off process has
ended, until the set DHW temperature
has been reached at the cylinder pri-
mary temperature sensor.
The cylinder primary pump and the
three-way diverter valve remain ON
for a further 30 s.
Constant temperature control unit (cont.)
91
Function description
5692 619 GB