Replacing The Fan - Vaillant ecoTEC plus SERIES Installation And Maintenance Instructions Manual

14.3

Replacing the fan

7
6
14.2 Removing the fan
> Remove the air intake pipe (¬ section 12.4.1).
> Remove the three plugs from the gas valve
(5, ¬ fig. 14.2).
i
The plugs on the fan motor and the venturi have
latching lugs with which they engage in the slot.
You have to push in the latching lug to pull off
the plug.
> Remove the plug from the venturi sensor (3, ¬ fig. 14.2).
> Remove the plug(s) (depending on the boiler version)
(4, ¬ fig. 14.2) from the fan motor.
> Unscrew the two cap nuts at the top (7, ¬ fig. 14.2) and
bottom (6, ¬ fig. 14.2) from the gas valve. Counterhold at
the opposite side of gas valve when unscrewing, or
unscrew both cap nuts at the same time.
> Unscrew the three screws (2, ¬ fig. 14.2) between the
mixture pipe (1, ¬ fig. 14.2) and the fan flange.
Caution.
b
Risk of damage to the gas pipe.
The corrugated gas pipe can be damaged
by incorrect handling.
> Do not suspend the gas valve on the flex-
ible corrugated gas pipe.
> Do not suspend any loads on the corru-
gated gas pipe.
Installation and maintenance instructions ecoTEC plus 0020116700_01
Replacing components
1
1
2
3
3
4
5
14.3 Removing the gas valve and venturi from fan
> Remove the entire fan/venturi/gas valve unit from the
boiler.
> Unscrew the fixing screw (2, ¬ fig. 14.3) of the gas valve
out of the bracket.
> Remove the gas valve from the bracket.
> Remove the venturi (3, ¬ fig. 14.3) with the gas connect-
ing pipe (1, ¬ fig. 14.3) out of the fan by turning the bayo-
net fitting of the venturi anti-clockwise as far as it will go
and pulling it out of the fan (straight).
2
14.4 Removing the bracket of the gas valve
> Remove the bracket (1, ¬ fig. 14.4) of the gas valve from
the fan by unscrewing the three screws (2, ¬ fig. 14.4).
14
2
1
73