E93.1001EN.C Manual CD
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Burner door gaskets
When these gaskets have changed colours at some parts, the rubber has cured and/or has damages, these gas-
kets must be replaced. Notice: only use the gaskets that are supplied by the water heater manufacturer.
Fan
When the fan blades are polluted and dirty, carefully clean the blades with a soft brush. Notice: Do not use too
much force on the blades or else the fan might be out of balance and run irregularly, causing noises and fan
failures. Check the fan also for any water damages. In doubt always replace the fan of the water heater.
Insulation
The insulation of the heat exchanger (located on the rear wall inside the heat exchanger and burner door) must
be inspected. If this insulation disk shows any signs of (water) damage or degradation it should be exchanged.
Also check if there are any indications of a high condensate level in the burner room (caused by a blocked siphon)
that might have wetted the rear wall insulation. When this has happened the rear wall insulation should also be
replaced.
Only use the insulation disk that is supplied by the water heater manufacturer.
The same procedure must be applied on the insulation and gaskets fitted on the burner door.
Siphon
Disassemble the siphon and clean every part of it. Check the siphon connection of the heat exchanger for any
blocking or pollution and clean it (if necessary). Check the functioning of the siphon by pouring clean tap water in
the burner room (when burner door is removed). This water will exit the heat exchanger by the siphon. Notice:
Don’t wet the rear wall insulation.
Heat exchanger and burner room
After the removal of the complete burner unit, check if there is any debris and dirt in the heat exchanger. The coils
of the heat exchanger can be cleaned by using a non-metallic brush. After this the dirt and dust can be removed
with a vacuum cleaner and by flushing the burner room with water. Don’t forget afterwards to clean the siphon
once again.
Cleaning the burner room with acid or alkali products is prohibited.
D = 8 - 10 mm
D = 0.315 - 0.393 inch
D
3.5 mm / 0.14 inch
The siphon must always be
filled with water to the edge be-
fore placing back on the unit
Point of view in next picture
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