42
Installation and maintenance instructions ecoTEC plus 0020244998_04
13.6.2 Replacing the fan
1
2
3
4
5
6
7
1.
Remove the air intake pipe.
2.
Remove the three plugs from the gas valve assembly
(5
)
.
3.
Remove the plug from the sensor on the Venturi
(3)
by
pushing in the latching lug.
4.
Remove the plug/plugs
(4)
(depending on the unit
design) from the fan motor by pushing in the latching
lug in each case.
5.
Unscrew the two union nuts
(7)
and
(6)
on the gas valve
assembly. Use an open-ended spanner to counterhold
the opposite side of the gas valve assembly when un-
screwing.
6.
Unscrew the three screws
(2)
between the mixture pipe
(1)
and the fan flange.
1
3
2
7.
Remove the entire unit comprising the fan, Venturi and
gas valve assembly from the product.
8.
Unscrew the gas valve assembly fixing screw
(2)
from
the retainer.
9.
Remove the gas valve assembly from the retainer.
10. Remove the Venturi
(3)
, including the gas connection
pipe
(1)
, from the fan by turning the bayonet fitting on
the Venturi anti-clockwise as far as it goes and remov-
ing it straight from the fan.
1
2
11. Remove the gas valve assembly retainer
(1)
from the
fan by unscrewing the three screws
(2)
.
12. Replace the defective fan.
2
1
3
4
5
13. Refit the components in the reverse order. New seals
(4)
and
(5)
must be used for this. 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)
.
14. Screw the flexible gas supply to the gas valve
assembly. Use new seals for this.
15. When tightening the union nut on the gas valve as-
sembly, use an open-ended spanner to counterhold
the opposite side of the gas valve assembly.
16. Perform a gas family check after installing the new fan.
13.6.3 Replacing the gas valve assembly
Note
To replace the gas valve assembly, you will need
a Torx T20. To replace the gas valve assembly
directly from the front, you will need an offset
screwdriver or a Torx T20 socket. If you do not
have access to an offset screwdriver or the like,
you must first remove the entire unit comprising
the fan with gas valve assembly before you can
remove the gas valve assembly from the retainer.
