The functions 4
17
We reserve the right to make any changes due to technical modifications.
Operating instructions RC20 room controller • Issue 08/2006
4.3 Heating domestic hot water
The programming unit also offers you the option of heating DHW
in an energy-conscious manner. Adjustment depends on how the
room controller was installed (see section 5.1 "What does the
RC20 room controller regulate?", page 23):
– If the RC20 room controller is the only programming unit in the
system, DHW heating commences automatically 30 minutes
before the heating program starts its day mode. DHW is not
produced during might mode. In day mode, the DHW
circulation pump is started twice every hour for three minutes
to ensure a constant supply of hot water to taps. The DHW
temperature can be set to a maximum of 60 °C
(= factory setting).
– If the RC20 room controller is installed as a remote control unit
for one heating circuit
1)
, DHW heating and the operation of the
DHW circulation pump for the entire heating system is adjusted
using the programming unit (e.g. RC30/RC35). The selected
DHW temperature can be modified using the RC30/RC35 or
the RC20; however, the setting range of the RC30/RC35
applies (max. 80 °C).
4.3.1 Setting the DHW temperature
You can check or change the DHW temperature:
Hold the DHW key down and select the required DHW temperature
using the rotary selector.
WARNING!
RISK OF SCALDING
The factory-set DHW temperature is 60 °C. There is a risk of
scalding at the taps if the temperature is set to above 60 °C.
z If the DHW temperature is set to above 60 °C, you should only
draw off mixed hot and cold water.
+
1)
Not possible for operation using boilers with UBA 1.x.
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