Valor 520AN Installation & Operation Manual - page 18
18
18 SERVICING INFORMATION
- (For qualified service
engineers only)
The repair parts are shown on the separate repair parts leaflet. Please
always quote Part Number and description with requests for spares.
TURN OFF THE GAS AND MAKE SURE THAT THE
APPLIANCE IS COOL BEFORE COMMENCING ANY
SERVICING. ALWAYS TEST FOR GAS SOUNDNESS AND
CORRECT VENTING OF COMBUSTION PRODUCTS AFTER
REFITTING THE APPLIANCE.
Methods of removal of the window unit and control knob are
described in the installation and cleaning sections of this manual.
18.1 TO REMOVE THE REAR BURNER TUBE
1.
Open the cast door remove the window unit assembly and logs.
2.
Unscrew the two screws securing the burner tube to the left side of
the firebox. Lift the burner tube clear.
3.
Refit in the reverse order. When refitting make sure that the burner
tube is properly located over the injector carrier at the right side.
18.2 TO REMOVE THE FRONT BURNER TUBE
1.
Open the cast door remove the window unit and logs.
2.
Remove the screw securing the firebox front cross rail at the left side
and decorative baffle.
3.
Slacken the screw securing the cross rail and decorative baffle at the
right side and swing the rail upwards at the left side to give access to
the burner tube screws.
4.
Unscrew the two screws securing the burner tube to the left side of
the firebox. Lift the burner tube clear.
5.
Refit in the reverse order. When refitting make sure that the burner
tube is properly located over the injector carrier at the right side.
18.3 TO REMOVE THE ELECTRODE
1.
Disassemble the outer case by reversing the procedures outline earlier
in the installation manual until the condition shown in Figure 16 is
reached. Carefully lift the sides and ashlip assembly forward and away
from the heater.
2.
Though not essential for access to the electrode, it is recommended
that the window unit and logs are removed so that the electrode tip
position can be checked when replaced.
3.
Remove the two screws securing the electrode unit to the bulkhead
panel outside the right side of the firebox. Pull the electrode with lead
attached clear.
4.
Disconnect the lead from the electrode.
5.
Refit in the reverse order.
18.4 TO REMOVE THE PILOT & CROSS LIGHTING
BURNER
1.
Open the cast door remove the window unit assembly and logs.
2.
To gain clear access to the pilot burner screw, detach the right hand
front log support by removing two screws - see figure 28.
3.
Remove the pilot and cross lighting burner by unscrewing the two
screws fixing it to the bracket at the right side of the firebox - see
figure 28.
4.
Refit in the reverse order.
18.5 TO REMOVE THE PILOT JET
1.
Remove the two screws securing the firebox front cross rail and
decorative baffle. Lift rail and baffle clear.
2.
Remove the pilot and cross lighting burner - see section 19.4
3.
Disconnect the pilot pipe at the jet end and spring clear of the
carrier.
4.
Remove the pilot jet and carrier from the bracket.
5.
Refit in the reverse order. Test for leaks
Fig. 28 Firebox internal fixings