Checking The Aeration Setting Of The Burner; To Remove The Ignition Microswitch; To Remove The Gas Shut-Off Microswitch - Valor 940 Installer And Owner Manual

17.1 Checking the aeration setting of the burner.

1. The aeration shutter is factory set and should
not require adjustment. If the shutter is not as
shown in figure 46 and requires adjustment,
loosen the two aeration shutter screws, slide the
aeration shutter to the position shown in figure 46
and tighten the fixing screws.

17.2 To remove the ignition microswitch.

See figures 47 & 48.
1. Remove the bottom front cover and
the fire front casting.
2. Disconnect the leads from the ignition
microswitch (The lower of the two
microswitches - See figure 47).
3. Detach the microswitch and insulation
pad by removing two screws.
4. 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.
17.3 To remove the gas shut-off
microswitch.
(See figures 47 & 48).
1. Remove the bottom front cover and the fire
front.
2. Loosen the thermocouple nut to free the
microswitch leads and pull the leads clear of
the thermocouple interrupter block (See figure
48).
3. Detach the bridging bracket, microswitch
assembly by removing two screws (See figure
47).
4. 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.
©
GDC Group Ltd. 2011
INSTALLER GUIDE
Page 41
Figure 46. Aeration shutter setting
Figure 47. Microswitches
Figure 48. Thermocouple interrupter
block