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40 | Shutting down the heating system
8
Shutting down the heating system
CAUTION: Risk of system damage from
freezing.
If the heating system has been switched off,
it may freeze up in cold weather conditions.
B Leave the heating system switched on as
long as possible.
B Protect a disabled heating system from
freezing by draining the heating system
and hot water pipes at the lowest point.
8.1
Shutting down normally
B When using ext. aquastat/control: Shut off main
heating system by turning off the emergency shut-off
switch (position "OFF"). This switches off the boiler
with all its components.
B Further shut-down procedure
control documentation.
Fig. 60
Heating system emergency shut-off switch
B Shut off fuel supply by closing main valve.
6 720 648 162 (2011/08)
refer to aquastat/
7 747 019 141-35.1RS
8.2
Shutting down the heating system in
an emergency
Use the heating system emergency shut-off
switch located outside the boiler room or
the heating system circuit-breaker for
emergency shutdown.
What to do in an emergency
Explain to the customer what to do in an emergency, e.g.
a fire.
B Never put yourself at risk of fatal injury. Your own
safety must always take the highest priority.
B Shut off fuel supply by closing main valve.
B Disconnect the heating system from the electrical
power supply by means of the emergency shutoff
switch or the heating system circuit-breaker.
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