5. Fully service burner and replace electrodes, if required
(a)
The fan limit thermostat
(b) The front outer case panel
(c) Remove and support flue
(d) Remove Rear panel
(e) The heat exchanger cover plate, front and rear.
(f) Brush any deposits from all of the flue ways using a brush. Also brush down
the heat exchanger tubes.
(g) Remove any soot from the bottom of the combustion chamber with a vacuum
cleaner.
(h) Inspect soundness of combustion chamber/heat exchanger.
(i) Replace all items in reverse order.
NOTE
: Fit new gasket or seal to gas exchanger box, cleaning door where
necessary.
Note: Regarding External Heaters
If the heater is housed within an Air Handling Unit, there will be sufficient room
to allow servicing. Servicing as per our standard internal procedures.
Please note in extreme weather conditions, always ensure any electrical
connections etc are protected and do not allow water onto them.
If stand alone external heater, there will be a door, which is hinged up over to
allow protection to the engineer from weather conditions; an illustration of the
external heater can be found in
section 5 Fig 1
.
Wet Conditions
If it is found that the area in which the heater is installed has become
wet/flooded, the heater must be electrically isolated immediately and an
investigation to find out if any water has penetrated into the heater controls. If so,
ensure they are dried out properly before re-installing the electric supply.
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