REMEHA W40 Installation And Maintenance Instructions Manual page 38

12.3 Maintenance
If the appliance is checked for technical combustion
problems and the result is that either combustion or
heat exchanger are no longer at the optimum level,
maintenance should be carried out. This maintenance
will consist of:
- cleaning the heat exchanger with a nylon brush or
compressed air and possibly rinsing with water
- cleaning the fan
- cleaning the siphon.
Work order (see fig. 26):
- Switch off the appliance via the burner switch on the
instrument panel on the front.
- Disconnect the electrical power supply to the
appliance.
- Close the cock in the gas pipe to the appliance.
- Remove the front cover and the two side covers.
- Open the catch on the instrument panel and tilt the
panel forwards.
Attention:
To prevent a short-circuit in the external connections or
in the instrument panel as a result of the unexpected
penetration of leak water, you are advised to cover the
instrument panel.
- Remove the cover from the air box.
- Remove the pipes (E) from the inlet mixer.
- Open the union nut for the gas pipe in the air box (A) .
Remember!!!
To prevent the flexible gas pipe twisting, when slacken-
ing and tightening the union nut (A1), the hexagon nut
(A2) should be held in place with a spanner, see fig. 25.
A2
A1
Fig. 25 ((Dis)assembly of the gas pipe
- Remove the bolts from the attachment strips (B) . The
fastening strips can then be removed.
- Remove the electrical connection from the fan (D).
- Lift the burner from the fan carefully upwards and
remove the burner from the appliance.
- Check the burner seal on the heat exchanger.
If damaged or hardened, replace the seal
(recommended: replace every 3 years).
Attention:
The metal-fibre layer on the burner is susceptible to
mechanical damage and should therefore be handled
with care. Do not touch with brushes or other sharp
objects.
- To inspect/clean the heat exchanger, the hold-down
strips (F) on the underside and sides must be removed
(brass wing nuts). Also remove the 3 metal screws on
the underside of the inspection plate (G) .
- Now remove the inspection plate (H) .
- If necessary, remove the 3 guide plates (I) between the
aluminium finned pipes, in order to clean the finned
pipes.
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remeha W40/60-m ECO