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6
Shutting down the heating system
6.1
Standard shutdown
B Switch off the ON/OFF switch on the control unit
(position "0").
This switches off the boiler and all its components
(such as the burner).
B Close the main fuel shut-off valve.
NOTICE: System damage due to frost!
When the heating system is switched off, it
can freeze up if there is a frost.
B Leave the heating system permanently
switched on.
B Drain the heating system and DHW
pipework at the lowest possible point to
protect the heating system against
freezing while it is switched off.
NOTICE: System damage due to frost!
The heating system can freeze up during a
power failure or if the power supply has
been switched off.
B Check the "Control unit settings" to
ensure the system remains operational
(especially when there is a risk of frost).
Fig. 59 Shutting down the heating system
1
ON/OFF switch
UNI 7000 F
6.2
In the event of an emergency, e.g. a fire, proceed as
follows:
B Never put yourself at risk of fatal injury. Your own
B Close the main fuel shut-off valve.
B Isolate the heating system from the mains power
1
Shutting down the heating system | 39
In an emergency
safety is paramount.
supply via the heating system emergency stop switch
or the corresponding domestic fuse.
6 720 803 940 (2010/03)
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