INSTALLER’S GUIDE
Page 22
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
s
ecuring 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 sure
that it locates squarely onto the pilot unit without any gaps between the cage edges and the
pilot unit.
3. When the thermocouple is removed from the interrupter block, the microswitch
lead terminals in the interrupter block will be loose. Make sure that they are properly
secured to give a good electrical contact when retightening the thermocouple nut.
Fig. 31 Pilot unit removal (Dust
cage not shown for clarity)
Fig 30 Thermocouple interrupter block
