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SERVICE AND SPARES
10
SERVICE AND SPARES
To ensure the appliance correct functioning we
recommend an annual inspection or if necessary
maintenance.
Your appliance must only be serviced by a
qualified service engineer.
DANGER:
B ISOLATE THE MAINS GAS SUPPLY
BEFORE STARTING ANY WORK AND
OBSERVE ALL RELEVANT SAFETY
PRECAUTIONS.
NOTICE: COMPONENTS
B After replacement of any components
always check for gas tightness. Where
relevant carry out functional checks as
described in the commissioning section.
Damaged O-rings or gaskets must be
replaced.
NOTICE:
B Service work must be carried out by a
competent registered engineer.
NOTICE:
B SERVICE MUST NOT BE ATTEMPTED IF A
CO/CO2 ANALYSER IS NOT AVAILABLE.
B Use only genuine spare parts.
B Order accessories according to the list of spare parts
provided with the appliance.
B Substitute dismantled joints and o-rings with new
ones.
B Only the following lubricants must be used:
– On hydraulic parts: Unisilikon L 641
(part number 8 709 918 413)
– Threaded joints: HFt 1 v 5
(part number 8 709 918 010)
10.1 PERIODIC MAINTENANCE TASKS
FUNCTIONAL CHECKS
B Ensure that all safety, regulatory and checking
components are in good working order.
HEAT EXCHANGER
B Inspect the heat exchanger.
B If it is dirty:
46
– Dismantle the combustion chamber and remove
the heat exchanger overheat thermostat (
[8]).
– Clean the chamber with a pressurized water jet.
B If the dirt resists: soak soiled parts in hot water with
detergent and clean carefully.
B If necessary: de-scale the interior of the heat
exchanger and connection tubes.
B Reassemble the heat exchanger using new gaskets
and o-rings.
B Remount the heat exchanger overheat thermostat on
its support.
BURNER
WARNING: Burner damage!
The burner surface is very fragile.
B Do not touch the burner surface, take
extra caution during the maintenance
operations!
B Inspect the burner annually and clean if necessary.
B If it is very dirty (grease, soot): Dismantle the burner
and soak it in hot water with detergent and clean it
carefully.
B Verify if the flame is stable and blue without signs of
yellow flames.
Yellow burner flames are an indication of
improper combustion. Check flue
termination and ventilation in line with the
manufacturer's instructions.
B Verify CO
levels (
chapter 9.3) and adjust if
2
necessary.
6 720 646 322 (2012/05)
Fig. 2
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