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16
Fig. 25
6.11
GAS VALVE (see fig. 23)
Carry out component removal procedure as de-
scribed in 6.4.
The gas valve must be changed as complete unit.
Unclip and remove the air chamber cover.
Disconnect the electrical plug from the gas valve.
Disconnect silicone tube from gas valve regulator.
Slacken and unscrew gas valve inlet and outlet
connections. Please note, the sealing washers
must be discarded and replaced with new sealing
washers. The gas valve can now be removed.
Replace in the reverse order. Refer to section
seven for detailed instructions on how to set-up
the gas valve. WARNING, A GAS SOUNDNESS
CHECK MUST BE CARRIED OUT.
6.12
FAN (see fig. 23)
Carry out component removal procedure as de-
scribed in 6.4.
Unclip and remove the air chamber cover.
Disconnect the electrical plug from the fan.
Locate and remove the 4 bolts that secure the fan
to the pre-mix manifold.
Replace in reverse order.
6.13
BURNER (see fig. 24)
Carry out component removal procedure as de-
scribed in 6.4.
Unclip and remove the air chamber cover.
Locate and remove the 8 nuts (10mm) securing
the pre-mix manifold/burner assembly.
Disconnect the gas valve outlet pipe at its
connection to the pre-mix manifold. Disconnect
the silicone pipe from the pre-mix manifold. Gently
pull away the fan/pre-mix manifold assembly
from the heat exchanger. Remove the earth wire
from the burner earth tab and gently lift the burner
from its location.
Replace in the reverse order. Please note, ensure
all seals are in good condition, taking care to
ensure they are replaced correctly.
6.14
ELECTRODE (see fig. 24 & 25)
Carry out component removal procedure as de-
scribed in 6.4.
Unclip and remove the air chamber cover.
Remove the electrode lead. Remove the 2 screws
that secure the electrode to the combustion cover,
and gently withdraw the electrode.
Replace in the reverse order, ensuring that the
electrode seal is in good condition and that the
combustion cover insulation board is undisturbed.
6.15
INJECTOR (see fig. 26)
Carry out component removal procedure as de-
scribed in 6.4.
Unclip and remove the air chamber cover.
Remove the fan as detailed in 6.12 using a 17mm
socket, locate and unscrew the injector.
Replace in the reverse order.
Fig. 22
Fig. 24
Fig. 26
Housing
P.C.B.
Cover
Gas
valve
Silicone
tube
Outlet
Inlet
Pre-mix manifold
Fan securing bolts
Fig. 23
Fan
Securing nuts
Spark
electrode
Gas valve outlet
connection
All dimensions in mm.
Injector
Fan
Burner plate
