projects up from the fire case base. See
figure 29.
10.6
To remove the thermocouple interrupter
block (See figure 30)
10.6.1
Remove the “ash pan” casting and
bottom front
casting.
10.6.2
Detach the thermocouple from the
interrupter block by unscrewing the
thermocouple nut.
10.6.3
Detach the two microswitch leads from
the interrupter block.
10.6.4
Remove the interrupter block by
unscrewing from the gas shut-off tap.
10.6.5
Refit in the reverse order. If the
microswitch leads cannot be easily
attached to the interrupter block when it
is fully tightened to the gas shut-off tap,
slacken it and rotate to allow the leads to
be fitted. Retighten making sure that the
leads remain in place in the interrupter
block. Fit and tighten the thermocouple
nut making sure that the leads are
secured in the interrupter block to give a
good electrical contact.
10.7
To remove the pilot unit
10.7.1
Remove the burner unit- See section 10.4
10.7.2
Detach the pilot pipe from the gas shut-
off tap.
10.7.3
Detach the thermocouple from the
interrupter block by unscrewing the
thermocouple nut.
10.7.4
Detach the electrode lead from the
underside of the electrode tab.
10.7.5
Remove the first screw securing the dust
cage to the pilot unit & burner.
Carefully remove the dust cage and place
aside. See figure 31.
10.7.6
Remove the second screw securing the
pilot unit to the burner. Remove the
pilot unit and place it aside. See figure 31.
10.7.7
Disconnect the pilot pipe from the pilot
unit elbow.
10.7.8
Refit in the reverse order. When refitting
the burner unit, make sure that the
tab at the right side of the battery box is
in front of the “L” shaped bracket which
projects up from the fire case base. See
figure 29.
Note
1 The pilot unit must be replaced as
a whole assembly. Its individual
components are not separately
replaceable.
2. Once removed, ensure that the dust
cage is cleaned before refitting. Make
Page 17
figure 30
Thermocouple interrupter block
figure 31
Pilot unit removal (Dust cage not shown
for clarity)
figure 32
Shut-off tap (viewed from rear with
burner turned over)
INSTALLER GUIDE
Valor 600B610_01 7/12/00 3:23 PM Page 17
