Modena Installation
and Service Manual 10
08/06
7. SERVICING INSTRUCTIONS
The heater is fitted with a pilot light and flame-sensing device which is also an oxygen depletion sensor
(O.D.S). This is not adjustable and must not be put out of action. If any parts of this system requires
replacement only original manufacturers parts must be used.
The following servicing procedure should be carried out regularly and only by a qualified person.
i. Ensure that the heater is turned off and is cold.
ii. Remove the front panel, glass frame securing screws and the glass frame (Fig.2)
iii. Carefully remove any deposits of dirt, lint etc, from the vermiculite burner bed, aeration
holes and pilot assembly with a soft brush. Do not use a vacuum cleaner near the
vermiculite burner bed.
iv. Clean the pilot aeration ‘hole’.
v. Inspect the catalyst for sign of damage and dirt. The expected life of the catalyst is in
excess of 11,000 hours (10 years of normal use). After this time the catalyst should be
replaced. If there are any deposits of dirt or soot on the catalyst clean with a soft brush
and a vacuum cleaner.
vi. Due to high temperatures reached within the heater, surface cracks may appear on the back
board behind the flames. This is quite normal and will not affect the safe operation of the
heater. Replace the glass frame.
vii. Check the high and low burner setting pressures as described in 5) COMMISSIONING
THE HEATER.
viii. Check the safe operation of the heater.
If a combustion analyser is available check the combustion performance of the stove as
follows:
a) With the heater cold remove the combustion test cover (Fig.6).
Light the heater on HIGH and after 15 minutes check the combustion performance is
in accordance with Fig.7.
b) If the Co figures are more than given in Fig.7 below the catalyser this suggests that
either the aeration holes on the burner require cleaning or new vermiculite granules
are required. Turn OFF the heater and investigate and correct.
c) If the Co figures are more than given in Fig.7 above the outlet grille this suggests that
the catalyser is due for changing.
d) Replace the combustion test cover.
ix. Check that the purpose provided air vent is non-obstructed.