Checking The Aeration Setting Of The Burner; To Remove The Ignition Microswitch; To Remove The Gas Shut-Off Microswitch - Valor Fires 953 Installer And Owner Manual

INSTALLER GUIDE

17.1 Checking the aeration setting of the burner.

1. The aeration shutter is factory set for use with a 'pebble' ceramic fuel effect. It is
important to ensure that the aeration setting is correct for the ceramic fuel effect used.
Check the aeration shutter setting even if fitting the 'pebble' fuel effect (See figure
30).
2. To adjust the aeration setting, loosen
the two aeration shutter screws, slide the
aeration shutter to the position shown in
figure 30 and tighten the fixing screws.
17.2 To remove the ignition
microswitch.
(See figures 31 & 32).
1. Remove the firefront casting and the
front cover casting.
2. Disconnect the leads from the ignition
Figure 30. Aeration shutter settings
microswitch (The lower of the two
microswitches - See figure 31).
3. Detach the microswitch and
insulation pad by removing two
screws.
4. Replace in the reverse order.
5. 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 31 & 32).
1. Remove the firefront casting and
Figure 31. Microswitches
the front cover casting.
2. Loosen the thermocouple nut to free
the microswitch leads and pull the leads
clear of the thermocouple interrupter block
(See figure 32).
3. Detach the bridging bracket,
microswitch assembly by removing two
screws (See figure 31).
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.
Figure 32. Thermocouple interrupter block
Page 36
©
Baxi Heating U.K. Limited 2010.