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7
Inspection and maintenance
> Reconnect the gas supply (3) to the gas valve, ensur-
ing that a new sealing washer is used and correctly
located. Use the spanner flat at the flexible gas line to
hold the gas fittings.
11
Fig. 7.9 Testing the gas supply for soundness
> Turn on the gas supply and test for soundness. Check
especially the screwed connections (3) and (11).
> Refit the air inlet pipe, ensuring that the blue seal in
the air intake pipe is correctly located.
7.3
Cleaning the condensate siphon
a
Danger!
Risk of poisoning from escaping flue gas!
An empty or insufficiently filled condensate
siphon may allow flue gas to escape into the
room air.
> Fill the condensate siphon with water
before starting up the boiler.
Fig. 7.10 Cleaning the condensate siphon
58
> Remove the lower part (1) of the condensate siphon
by turning the bayonet catch in anticlockwise direc-
tion.
> Clean the siphon part section by rinsing it out with
water.
> Fill the lower part with water until about 10 mm below
the upper edge.
> Fasten the lower part again on the condensate siphon.
7.4
Checking the expansion vessel
Fig. 7.11 Checking expansion vessel admission pressure
i
It is not necessary to perform this check
every year – a check every three years is suf-
ficient.
> Ensure the boiler CH service valves are closed.
> Release the pressure from the boiler.
> Remove valve cap from expansion vessel charge
point.
> Check that the internal charge pressure of the expan-
sion vessel is between (0.75 and 0.9 bar) 75 and
90 kPa.
If the pressure is lower than this the vessel should be
repressurised using an air pump.
> Refit the valve cap.
> Repressurise boiler and heating system.
7.5
Recommissioning the boiler
1
> Carry out electrical safety checks.
> Turn on the electrical supply.
> Open the boiler CH service valves.
> Carry out function checks of boiler operation as previ-
ously detailed.
Instructions for installation and servicing ecoTEC 839592_13
1
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