To Remove The Ignition Microswitch - Valor 719 Installer's Manual

INSTALLER GUIDE

17.2 To Remove the Ignition Microswitch

See figures 39 & 40
The ignition microswitch is stamped
V4NT9C4YC
1. Remove the bottom front cover and
the front cover casting.
2. Detach the microswitch cover by
removing one screw and pulling clear of
the location lug. See figure 39.
3. Disconnect the leads from the
ignition microswitch (The lower of the
two microswitches - See figure 40).
4. Detach the microswitch and
Figure 39. Microswitch Cover Removal
insulation pad by removing two
screws.
5. Replace in the reverse order.
6. 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 39, 40 & 41.
The gas shut-off microswitch is
stamped V4NT9C2YCGPX or
Figure 40. Microswitches
V4NT9C2YCAUX.
1.Remove the bottom front cover
and the fire front casting.
2. Detach the microswitch cover by
removing one screw and pulling
clear of the location lug. See figure
39.
3. Loosen the thermocouple nut to
free the microswitch leads and pull
the leads clear of the thermocouple
interrupter block. See figure 41.
4. Detach the bridging bracket,
microswitch assembly by removing
Figure 41. Thermocouple interrupter block
two screws. See figure 40.
Page 31