Boiler Inspection And Maintenance; Why Is Regular Maintenance Important; Checking The Flue Gas System, Combustion Air Supply, Air Inlet And Ventilation Openings; Inspection Of The Boiler And Burner - Buderus Logano G234X Installation And Service Instructions Manual

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Boiler inspection and maintenance

Note the following when performing preventive maintenance:
DANGER: Danger to life from electric shock!
▶ When performing maintenance, label all connection
cables before disconnecting them.
▶ If cables are connected incorrectly, the system may
not operate correctly, with possibly dangerous
consequences.
▶ Always check that the heating system is working properly after
carrying out any maintenance work.
9.1

Why is regular maintenance important?

Heating systems must be serviced annually for the following
reasons:
• To maintain high efficiency Economical operation (low fuel
consumption)
• To achieve a high level of operational safety
• to maintain the cleanest combustion.
• To ensure reliable operation and a long service life
Maintenance work may be carried out only by a trained and certified
installer or service company. If parts are replaced, Bosch approved
Buderus components may be used. A service must be carried out once a
year. The results of the inspection must be recorded in the maintenance
log ( page 31).
Spare parts can be ordered from Bosch with the aid of
the parts list.
9.2 Checking the flue gas system, combustion air supply,
air inlet and ventilation openings
▶ Check the flue gas system, including the combustion air supply.
▶ Check air inlet and ventilation openings.
▶ Remedy any defects immediately.
▶ Make sure that the combustion air supply and the ventilation
openings are not blocked at any point.
9.3

Inspection of the boiler and burner

▶ Perform a visual inspection of the boiler and burner for external dirt
accumulation.
▶ If dirt is found, clean boiler and burner.
Logano G234X – 6 720 811 233 (2014/05)
Boiler inspection and maintenance
9.4

Preparing the boiler for cleaning

DANGER: Risk of fatal injury from electric current when
appliance is opened up!
▶ Before opening the boiler:
Disconnect heating system from the power supply
via the ON/OFF switch or the appropriate building
fuse.
▶ Take measures to ensure that the heating system
cannot be accidentally reactivated.
WARNING: Risk of fire from foreign objects!
Foreign objects between the main orifice and burner rod
inlet opening can cause a fire.
▶ Ensure that there are no objects at this location.
▶ When working on an open boiler: Secure appliance
components and cables to prevent them from getting
between the openings during operation.
▶ Shut down the heating system ( Section 7.1, page 24).
▶ Remove front wall of boiler ( Fig. 18, page 18)
DANGER: Risk of fatal injury from explosion of
flammable gases!
▶ Operations on the gas lines may be carried out only
by properly licensed gas contractors.
▶ Wait five (5) minutes until all gas has dissipated.
Check whether there is any smell of gas, including at
floor level. If you smell gas: STOP!
Check that the gas shutoff valve is closed. Repeat the
odor test. If you do not smell gas, proceed to the next
step.
▶ Turn the gas valve ON/OFF knob [1] clockwise to the OFF position.
Do not use excessive force.
1
Fig. 30 Gas valve in OFF position
[1] ON/OFF knob (OFF position)
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