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HomeMatic HM-CC-RT-DN Manual

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18 Activating frost protection
operation (radiator switched
off)
If the room does not need to be heated, the valve can
be closed. The valve is only opened if there is a risk of
frost.However,thecalcicationprotectionfunctionis
still active.
• Press the Auto/Manu button (
), until Manu appears
in the display.
• In manual mode (Manu), turn the handwheel an-
ticlockwise until „OFF“ is displayed.
• To save changes and leave manual mode, press the
Auto/Manu button (
) again.
19 Additional functions in
connection with CCU
If the radiator thermostat is used in connection with a
HomeMatic Central Control Unit, additional functions
can be used via the software interface WebUI (You
willndfurtherinformationinthedownloadareaofthe
website www.homematic.com):
19.1 Setting valve protection function
The radiator thermostat can be protected against val-
vecalcicationautomatically.Therefore,anautomatic
routine descaling is performed once a week. The valve
completely opens and closes once. This avoids that
thevalvepingetsstuckduetocalcication.During
this period, operation is not possbile. Routine desca-
ling is factory-set to run once a week on Saturdays at
11:00 h.
In connection with the HomeMatic Central Con-
trol Unit the time for the routine descaling can
individually be adjusted.
“CAL” is displayed during descaling.
19.2 Switching time/date display
The factory setting will show the time on the display.
The display of date and time can be switched via the
WebUI.
19.3 Maximum valve opening
A maximum valve opening of 100% is set in the factory
settings. The maximum valve opening position (0-100
%) can be adjusted via the WebUI.
19.4 Maximum setpoint temperature
A maximum setpoint temperature of 30.5°C is set in
the factory settings. The maximum setpoint tempera-
ture (15.0 to 30.5°C) can be adjusted via the WebUI.
… 48 …


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