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

16.1 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 29 and requires adjustment, loosen the two aeration shutter
screws, slide the aeration shutter to the position
shown in figure 29 and tighten the fixing screws.

16.2 To remove the ignition microswitch.

(See figures 30 & 31).
1. Remove the firefront from the fascia
2. Disconnect the leads from the ignition
microswitch (The lower of the two microswitches
- See figure 30).
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.
16.3 To remove the gas shut-off
microswitch.
See figures 30 & 31.
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 31).
3. Detach the bridging bracket, microswitch
assembly by removing two screws (See figure
30).
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.
16.4 To remove the fascia.
Remove the fascia in the reverse order to that
shown in the fascia fitting guide. The fascia
fitting guide is supplied with the fascia and
should be left inside or attached to this guide.
Always remember to remove the control linkage screw (See figure 32).
©
Baxi Heating U.K. Limited 2010.
INSTALLER GUIDE
Figure 30. Microswitches
Page 32
Figure 29. Aeration shutter setting
Figure 31. Thermocouple interrupter
block