INSTALLER’S GUIDE
Page 20
Fig. 27 Slider knob
attachment
Fig. 26 Thermocouple Interrupter Block
Fig. 25 Microswitches
10.1
To remove the ignition microswitch
See figures 24 & 25.
The ignition microswitch is stamped V4NT9C4YC
10.1.1
Remove the “ash pan” casting and bottom front
casting.
10.1.2
Detach the microswitch cover by removing one
screw and pulling clear of the location lug (see figure 24).
10.1.3
Disconnect the leads from the ignition microswitch
(The lower of the two microswitches - See figure 25).
10.1.4
Detach the microswitch and insulation pad by
removing two screws.
10.1.5
Replace in the reverse order. Check that
the microswitch operates correctly by fully closing
it and observing that there are sparks at the pilot
electrode.
10.2
To remove the gas shut-off microswitch
See figures 24, 25 & 26.
The gas shut-off microswitch is stamped
V4NT9C2YCGPX or V4NT9C2YCAUX.
10.2.1
Remove the “ash pan” casting and
bottom front casting.
10.2.2
Detach the microswitch cover by
removing one screw and pulling clear of
the location lug (see figure 24).
10.2.3
Loosen the thermocouple nut to
free the microswitch leads and pull the
leads clear of the thermocouple interrupter
block (see figure 26).
10.2.4
Detach the bridging bracket,
microswitch assembly and insulation pad by removing two
screws (see figure 25).
10.2.5
Replace in the reverse order. When refitting the leads to
the interrupter block, make sure that they are secured firmly to
give a good electrical contact.
10.3
To replace the control slide knob
10.3.1
Detach the front fascia.
10.3.2
Detach the slider knob from the slider bar. See figure 27.
10.3.3
Refit in the reverse order.
Fig. 24 Microswitch Cover
Removal