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4.5
Gas Valve
1
. Turn the gas coc
k
OFF and disconnect
the electrical plug.
2.
P
ull off the earth lead and sensing pipe.
3. Undo the nuts on the venturi inlet pipe
and valve inlet pipe. Remove the gas valve.
4. Examine the sealing washers, replace if
necessary.
5
. Reassemble in reverse order, ensuring
the sealing washers are in place.
I
M
PORTANT:
The
C
O
2
must be chec
k
ed
and adjusted (see
C
ommissioning
C
hec
k
s
on p.3
1
and 32).
4.6
Fan
1
. Remove the air box front cover.
2. Undo the nut on the gas inlet pipe to the
venturi and pull the sensing pipe off the fan.
Examine the sealing washer and replace if
necessary.
3. Undo the screws securing the manifold to
the extension piece.
4.
P
artially remove the manifold and fan
assembly, being careful to retain the injector
in the venturi. Disconnect the fan electrical
plugs before completely removing the
assembly.
5
. Undo the screws securing the fan to the
venturi and fit the new fan, replacing the seal
if necessary.
6. Examine the gas
k
et behind the manifold
and replace if necessary.
7
. Reassemble in reverse order, ensuring
that the injector is in place and the sensing
pipe is connected to the fan.
Fig. 20
Gas Valve
Valve
Inlet
P
ipe
Gas Feed
Elbow
Earth
L
ead
Sensing
P
ipe
Venturi Inlet
P
ipe
C
over
Fan
Venturi
Manifold
Burner
Gas
k
et
Sensing
P
ipe
Injector
Sealing Washer
Sealing Washer
3
8
© Baxi Heating UK Ltd 2015