Replacing components
Installation and maintenance instructions ecoTEC plus 0020134833_01
77
14
i
The plug on the Venturi has latching lugs with
which it engages in the slot. You have to release
the latching lug by pushing it in to pull off the
plug.
>
Remove the plug from the Sensor of the venturi (
1,
¬ fig. 14.8
).
>
Unscrew the two cap nuts at the top (
5, ¬ fig. 14.8
) and
bottom (
4, ¬ fig. 14.8
) of the gas valve. Counterhold at
the opposite side of gas valve when unscrewing, or
unscrew both cap nuts at the same time.
>
Unscrew the fixing screw (
3, ¬ fig. 14.8
) of the gas valve
out of the bracket.
i
Since the fixing screw is difficult to access
beneath the retaining plate, alternatively, you
can remove the entire fan assembly (
¬ sec-
tion 14.3
).
>
Remove the gas valve from the bracket.
>
Refit the new gas valve in reverse order. Use new seals.
>
When the cap nuts are being screwed to the gas valve,
counterhold at the opposite side of the gas valve or
tighten both cap nuts simultaneously (
¬ fig. 14.6
).
>
After installing the new gas valve, perform a gas family
check (
¬ section 12.1.5
) and a gas ratio setting (
¬ sec-
tion 10.12
).
14.5
Replacing the Venturi including the mass
flow sensor
1
2
3
14.9
Replacing the Venturi including the mass flow sensor
>
Remove the air intake pipe (
¬ section 12.4.1
).
>
Remove the plug from the Sensor of the venturi (
1,
¬ fig. 14.9
).
>
Unscrew the cap nut (
3 ¬ fig. 14.9
) of the gas connecting
pipe (
2 ¬ fig. 14.9
) from the gas valve.
>
Remove the Venturi including the gas supply pipe from
the fan by turning the bayonet fitting on the Venturi
anti-clockwise as far as it goes and removing it from the
fan.
2
1
6
5
4
3
14.10
Removing the gas connecting pipe
Содержание ecoTEC plus VUI
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