Servicing & Parts Replacement; Ignition Microswitch; Gas Shut-Off Microswitch - Valor 4190 Installer's Manual

• Always turn off the gas supply before commencing any servicing (The inlet elbow for
this appliance incorporates an isolating valve).
• This product uses fuel effect pieces, burner compartment walls and gaskets containing
Refractory Ceramic Fibres (RCF), which are man-made vitreous silicate fibres. Excessive
exposure to these materials may cause temporary irritation to eyes, skin and respiratory
tract. Consequently, it makes sense to take care when handling these articles to ensure that
the release of dust is kept to a minimum. To ensure that the release of fibres from these
RCF articles is kept to a minimum, during installation and servicing we recommend that
you use a HEPA filtered vacuum to remove any dust and soot accumulated in and around
the fire before and after working on the fire. When replacing these articles we recommend
that the replaced items are not broken up, but are sealed within a heavy duty polythene
bag, clearly labelled as RCF waste. This is not classified as "hazardous waste" and may be
disposed of at a tipping site licensed for the disposal of industrial waste. Protective clothing
is not required when handling these articles, but we recommend you follow the normal
hygiene rules of not smoking, eating or drinking in the work area and always wash your
hands before eating or drinking.
• Check that the appliance is clean and that soot or debris is not
blocking the gaps between the coals causing an imperfect flame.
• Check that soot or debris is not impairing the electrode spark or
pilot burner.
• Check that soot or debris is not blocking any of the slots in the main
burner.
• After servicing, make sure that the ceramic walls and coals are
replaced correctly as described in the installation instructions.
Always test for gas soundness and spillage after servicing the appliance.
13.1 To remove the ignition microswitch (Figures 35 & 36)
The ignition microswitch is stamped V4NT9C4YC
13.1.1 Remove the bottom front cover and the fire front casting.
13.1.2 Detach the microswitch cover by removing one screw and
pulling clear of the location lug (see figure 35).
13.1.3 Disconnect the leads from the ignition microswitch (The
lower of the two microswitches - See figure 36).
13.1.4 Detach the microswitch and insulation pad by removing two
screws.
13.1.5 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.
13.2 To remove the gas shut-off microswitch (Figures 35, 36
& 37)
The gas shut-off microswitch is stamped V4NT9C2YCGPX or
V4NT9C2YCAUX.
13.2.1 Remove the bottom front cover and the fire front casting.
13.2.2 Detach the microswitch cover by removing one screw and
pulling clear of the location lug (see figure 35).
13.2.3 Loosen the thermocouple nut to free the microswitch leads and
pull the leads clear of the thermocouple interrupter block (see figure
37).
13.2.4 Detach the microswitch assembly by removing two screws (see
figure 36 ).
13.2.5 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.
13 SERVICING & PARTS REPLACEMENT
Fig. 35 Microswitch cover removal
Fig. 36 Microswitches
Fig. 37 Thermocouple interrupter block
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