To Remove The Pilot Unit; To Remove The Shut-Off Tap - Valor Fires 963 Installer And Owner Manual

20.10 To remove the pilot unit.

1. Remove the burner unit (See section 20.6).
2. Detach the pilot pipe from the pilot unit.
3. Detach the thermocouple from the interrupter
block by unscrewing the thermocouple nut.
4. Detach the electrode lead from the underside of
the electrode tab.
5. Remove the two screws securing the pilot unit
(See figure 43).
6. Refit in the reverse order.
Note:
1. The pilot unit is an atmosphere sensing
device. It must be replaced as a whole assembly.
Its individual components are not separately
replaceable.
2. 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 tightening the thermocouple
nut. Do not over tighten the nut.

20.11 To remove the shut-off tap.

(See figure 44).
1. Remove the burner unit (See section
20.6).
2. If lying the burner on its back, ensure
that the work surface is suitably protected.
This will avoid damage to the work
surface. Turn the burner unit upside down.
Detach the thermocouple and interrupter
block from the tap (See section 20.9
paragraphs 2 - 4).
3. Detach the pilot pipe from the tap.
4. Detach the inlet pipe.
5. Remove the hexagonal nut securing the
tap to the mounting bracket.
6. Detach the elbow by unfastening the
hexagonal nut connecting it to the flow
rate controller. Lift the tap (complete with elbow) clear.
7. Loosen the hexagonal locknut securing the elbow to the tap. Remove the elbow by
rotating it.
8. If fitting a new tap, remove the hexagonal nut at the mounting bracket end of the
old tap and fit to the replacement tap. Refit in the reverse order. The joint between the
elbow and tap should have a suitable thread sealant applied to prevent leaks (This
must have a constant working temperature of at least 80°C). When refitting, make
©
Baxi Heating U.K. Limited 2010.
INSTALLER GUIDE
Figure 44. (Viewed from rear with burner
turned over)
Page 44
Figure 43.