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9 Inspection and maintenance
Logano plus GB402 – 6 720 804 428 (2012/09)
38
9.9 Refitting detached parts
Reassemble all boiler parts that were removed for inspection and
maintenance purposes in the reverse order.
Check all gaskets for wear and damage.
Replace gaskets if required.
9.9.1 Fitting the fan
Push the fan underneath the screws undone on the underside of the
carriage. Lower the fan slightly at the front and insert a new gasket [1]
into the groove in the carriage.
Secure the fan to the carriage using all 4 screws.
Fig. 62 Replacing the fan/carriage gaskets
After the fan installation, check the gasket for correct seating.
9.9.2 Fitting the ventilation air collector and the gas valve
Secure the mounting plate on the fan. Position the rear semi-shell of
the ventilation air collector on the studs of the mounting plate and
push the fan inlet nozzle over the studs towards the semi-shell, then
secure it.
Push the impeller onto the studs, so that the marking points upwards.
Secure the front semi-shell with clips to the ventilation air collector.
Push the compensation hose onto the ventilation air collector.
Secure the gas valve with the nozzle plate on the studs.
9.9.3 Fitting the burner
Insert the gasket on the top of the carriage.
Insert the O-ring into the mixture manifold.
Insert the burner together with the mixture manifold into the boiler
combustion chamber.
Push the carriage towards the boiler block.
Secure the mixture manifold on the carriage using 4 screws.
Secure the mixture manifold at the front section of the boiler using
4nuts.
Plug all necessary cables into the gas valve and fan, and the plug-in
connections into the electrode block. During this step, route
ionisation cable [1] as shown in 63 (below the guide rod).
Fig. 63 Plug-in connection at the electrode block
9.9.4 Fitting the gas line to the gas valve
Insert a new O-ring into the gas valve flange.
Secure the gas valve to the fan using 4 screws.
Secure the flange of the gas connection again to the gas valve using
4screws.
9.9.5 Fitting the ventilation air unit
Push the ventilation air hose together with the connector onto the
ventilation air collector and secure with a hose clip at the upper
adaptor.
Observe the specified replacement interval for gaskets
( Chapter 9.13, page 39).
When fitting the impeller ensure that the marking points
upwards.
DANGER: Risk to life through escaping flue gas!
During installation, look out for faulty gaskets and
ensure they are seated correctly. Replace faulty
gaskets.
Observe the order of assembly described.
There is an indicator window on the top of the flange so
you can check from the outside that a gasket has been
inserted.
NOTICE: System damage through contaminated air.
Prior to fitting the ventilation air hose, check the
ventilation air grille (integrated into the lower hose
adaptor) for contamination and clean if required.
38


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