Replacing components
74 Installation and maintenance instructions ecoTEC plus 0020116700_01
14
> Replace the defective fan.
4
1
3
2
5
14.5 Installing the gas valve
> Refit the components in the reverse order. It is impera-
tive that you use new seals (4 and 5, ¬fig.14.5).
> Pay attention to the order in which the three screws
between the fan and the mixture pipe are screwed in, as
per the numbering 1, 2 and 3 (¬fig.14.5).
14.6 Tightening the cap nuts on the gas valve
> Screw the flexible gas pipe to the gas valve. Use new
seals.
When the cap nuts are being screwed to the gas valve,
counterhold the opposite side of the gas valve or screw
both cap nuts to the gas valve simultaneously.
> Perform a gas family check after fitting the new fan
(¬section12.1.5).
14.4 Replacing the gas valve
b
Caution.
Risk of material damage caused by mak-
ing unauthorised settings.
Modifications to the gas pressure regulator
on the gas valve can destroy the gas valve
and cause operating faults on the boiler.
> Never modify the factory setting for the
gas pressure regulator in the gas valve
1
14.7 Gas pressure regulator
Gas valves with gas pressure regulators (1, ¬fig.14.7) are
not installed in all boilers There are also versions without
gas pressure regulators.
1
2
5
4
3
14.8 Replacing the gas valve
> Remove the air intake pipe (¬section 12.4.1).
> Remove the three plugs from the gas valve
(2, ¬fig.14.8).
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