Installation Instructions Strebel Q-boiler range
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14 Maintenance
Maintenance or changes to the unit may only be carried out by an authorised technician.
14.1
The frequency of maintenance
We advise to carry out an inspection/overhaul to the boiler every year, but at least after
two years and an overhaul every four years, depending from the running hours
mentiond in the warranty conditions. When doing this the circumstances of the boiler’s
location must be taken into account. From this one can determine whether to deviate
from this advice. Please contact the country distributor for further guidance on the
frequency ans service requirements.
14.2
Maintenance activities
To carry out the maintenance activities please follow the next procedure:
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switch off the power supply;
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remove the screw behind the door on the front of the casing;
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Lift the casing and remove it towards the front.
The air box
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remove the transparant air box;
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clean the box with a cloth with a simple (non-abrasive) cleaning agent;
The fan unit and burner cassette
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remove the electrical connection plug from the gas valve and fan motor;
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loosen the nut of the gas pipe under the gas valve;
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replace the gasket by a new one;
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loosen the front cross head screw of the black plastic silencer;
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after this turn the two clamping rods ¼ turn and remove them by pulling them
forward. Note the right turning direction (red indicator);
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slightly lift the fan unit and remove it towards the front of the heat exchanger;
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remove the burner cassette out of the fan unit;
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check the burner cassette on wear, pollution and possible cracks. Clean the burner
cassette with a soft bruch and vacuum cleaner. If burners are cracked replace the
complete burner cassette;
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replace the gaskets between burner and fan unit and the gasket between fan unit
and heat exchanger;
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check the venturi and the gas-air distribution plate for pollution and clean this part,
if necessary with a soft brush and vacuum cleaner. If the air box contains a lot of
dirt it is plausible that the fan itself is dirty as well. To clean this, the fan has to be
removed from the hood and the venturi. Clean the fan with a soft brush and a
vacuum cleaner. Replace the gasket and ensure that all gaskets of the fan parts are
mounted correctly.
Heat exchanger
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check the heat exchanger for contamination. Clean this if necessary with a soft
brush and a vacuum cleaner. Prevent dirt falling down into the heat exchanger.
Flushing the heat exchanger from the top down is not permitted
Refitting of the components is done in reverse order.
Make sure that during refitting the clamping rods they are put in the right
position. They should be turned vertical.
