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32 | Shutting down
SB625WS/SB745WS6 720 805 218 (2016/02)
7 Shutting down
7.1 Shutting down the heating system
Shut down your heating system via the control unit. Switching off the
control unit also switches off the burner automatically.
Set the On/Off switch of the control unit to "0" (Off).
Isolate the fuel supply to the burner.
7.2 Shutting down the heating system in an emergency
In dangerous situations, immediately close the main fuel shut-off
valve and the power supply of the heating system via the boiler room
main breaker or the heating system emergency stop switch.
Isolate the fuel supply to the burner.
Never put your life at risk. Your own safety is paramount.
8 Inspection and maintenance
8.1 Why is regular maintenance important?
Heating systems require regular maintenance and service for the
following reasons:
to maintain a high level of efficiency and to operate the system
economically (low fuel consumption),
to achieve a high level of operational reliability
to maintain the cleanest possible combustion
The operator is required to have the entire heating system at least once
a year maintained, serviced and cleaned.
We recommend that an annual inspection and as-required service
contract is signed.
The servicing work carried out should be recorded.
Burner servicing should be carried out in accordance with the
instructions of the burner manufacturer.
8.2 Maintenance
Analyze the combustion flue gas before commencing any maintenance.
The results of flue gas analysis can give a clear idea of what servicing or
repairs are needed.
8.2.1 Opening the door
Turn the system’s main power switch OFF.
Close all the fuel cocks.
System A
Make sure that the safety bolts [1] on the side of the boiler are tight.
Fig. 32 Tighten safety bolts
[1] Safety bolts
System A and B
Remove the main fixing bolts ( Fig. 33, [2]) holding the door in
place.
NOTICE: Risk of system damage through frost.
When there is a frost, the heating system can freeze up if
it is not operational, e.g. because of a fault shutdown.
When there is a risk of frost, protect your heating
system against freezing up.
If your heating system has been shut down for
several days due to a fault shutdown and there is a
risk of frost, drain the heating water at the drain & fill
valve. Also leave the air vent valve at the highest
point in the system open.
NOTICE: Risk of system damage through frost.
The heating system can freeze up as a result of a power
failure or if the power has been switched off.
Check the "Control unit settings" to ensure the
system remains operational (especially when there is
a risk of frost).
NOTICE:
Always keep the oil supply valve shut off if the burner
is shut down for an extended period of time.
Only in emergencies, switch OFF the heating system via
the boiler room breaker or the heating system
emergency stop switch.
Only use genuine Bosch spare parts. You can order spare
parts from the spare parts catalog.
DANGER: Risk to life from electric shock!
Before opening a unit: disconnect electrical power
and lock to prevent accidental reactivation.
DANGER: Risk to life from explosion of flammable
gases!
Work on gas components must only be carried out by
qualified and authorized gas fitters.
NOTICE:
All cover plates, enclosures, and guards must be in
place at all times, except during maintenance and
servicing.
1
1
6 720 805 218-39.1T
The first time you open the door, remove the spare hinge
assembly ‘B’ (bushing, bolt, and washer) opposite the
pivot side of the door.
32


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