Strebel S-WG 100, Installation, Operating And Maintenance Manual, Page: 118 / 125

E09.012.246 Manual S-WG
119
Ignition / ionisation electrode
When the complete burner is removed, it is also very easy to check the ignition electrode. First check if the dis-
tances between the electrodes and between the electrode and the burner are according to the graph below.
When these are not correct, try to bend the electrodes in the right position. Notice: the electrodes undergo high
temperatures, therefore the electrodes become hard and are difficult to bend. While being bent, used electrodes
might break or burst. Check the electrode, after bending, for any tear/crack and signs of rust. When they are
burst/cracked or rusty, replace the electrode. Also replace the electrode when there is a crack in the ceramic
insulation of the electrode. When the electrode is to be replaced, also the gasket should be renewed.
Burner door gaskets
When these gaskets have changed colours at some parts, the rubber has cured and/or has damages, these
gaskets 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 si-
phon) 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.
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
before placing back on the unit
Point of view in next picture
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