Main Combi 30 HE Installation & Service Instructions Manual page 31

12.0 CHANGING COMPONENTS
12.5 Injectors (Fig. 52)
1. Remove the burner as described in Section 12.4.
2. Undo the screws securing the injector manifold to
the inlet elbow and remove the manifold.
3. Unscrew and replace injectors as required and
examine the sealing gasket, replacing as necessary.
Reassemble in reverse order.
12.6 Electrodes (Fig. 52)
1. Remove the four screws securing the combustion
box door and remove the door.
2. Undo the screws securing the burner to the
injector manifold. Draw the burner out of the
combustion box, pulling the electrode grommets
from the slots in the combustion box lower panel.
3. Disconnect the lead and grommet from the
electrode being replaced. Undo the securing screw
and withdraw the electrode to the burner.
4. Reassemble in reverse order.
12.7 Insulation (Fig. 53)
1. Remove the four screws securing the combustion
box door and remove the door.
2. Slide the side insulation pieces carefully out of
their carriers.
3. To replace the rear insulation piece it is necessary
to remove the heat exchanger as described in
Section 12.3 and slide out the side pieces.
4. The combustion box door insulation piece can be
replaced by carefully bending up the two retaining
tabs.
5. Replace all insulation pieces and reassemble in
reverse order.
Electrodes
Electrode
Grommets
Electrode
Leads
Side Insulation
Combustion
Box Door
Fig. 53
Injector
Manifold
Injector
Burner
Fig. 52
Rear Insulation
Side Insulation
Front Insulation
Inlet Elbow
Gasket
31