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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 disc shows any signs of (water) damage or degradation it must be exchanged. Also
check if there are any indications in the burner room of a high condensate level (caused by a blocked condensate
trap) that might have wetted the rear wall insulation. When this has happened the rear wall insulation must also
be replaced.
Only use the insulation disc that is supplied by the heater manufacturer.
The same procedure must be applied on the insulation and gaskets fitted on the burner door.
Rear wall insulation disk; changing procedure:
If the insulation disk has been degraded or damaged, it has to be replaced.
- Wait until the heat exchanger has cooled down. This is to prevent that de protective plastic film of the new in-
sulation disc sticks to the wall of the heat exchanger.
- make the old insulation wet, by spraying water over it. This in order to keep airborne dust to a minimum.
- with a knife, cut a cross in the
insulation
disk, avoiding the central insert
(on the back, not visible)
- make a square cut around the
central
insert
- remove the segments
- remove the central insert
The new disc has the clip on the
back.
- do NOT remove the film on the
new disc
- with the central insert on the
back, place
the new insulation disk by push-
ing it to
the rear of the wall. A "click"
means the
fitting is ok.
Replacement of burner door insulation.
Removal of the insulation:
- remove the electrode
- remove the defective insulation by sliding under the
periphery of the insulation a thin tool to loosen the
insulation and remove it.
- remove and clean the residues of the insulation and silicone glue
E93.1804.014
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