Baxi Combi 133 HE Plus Installation & Servicing Instructions Manual page 46

Injector Pipe
(100 & 80 HE models
Injector Pipe
Gas Valve Securing
Screws
Boiler Side
Electrical Plug
Fig. 67
Sensor
Leads
Securing Nut
Condensate Trap
Locknut
Condensate
Drain Pipe
Fig. 68
46
© Baxi Heating UK Limited 2005
Gasket
Aluminium
'O' Ring
Spacer
13.0
It is necessary to remove the fan before changing the
injector pipe, condensate trap and gas valve (see
section 13. 21).
13.22
1. Loosen the screw retaining the gas injector pipe at
the venturi (100 & 80 HE Plus models)
2. Remove the injector pipe by pulling out from the 'O'
ring joint in the gas valve.
3. Fit the new injector pipe and reassemble in reverse
order, applying Greasil 4000 (Approved Silicone
Grease) to both "O" rings.
13.23
1. Release the facia securing screws
down the facia box.
2. Loosen nut at gas inlet pipe at tap rail.
3. Undo the gas pressure pipe from the gas valve.
Gas Pressure
Pipe
4. Undo the screw and disconnect the electrical plug
from the gas valve.
5. Remove the two gas valve securing screws from
inside the air box holding the gas valve.
6. Remove the gas valve and inlet pipe from the airbox
side.
Gas Valve
7. Remove the four screws securing the gas inlet pipe
to the valve and refit to the new valve.
Gas Inlet Pipe
Flange
8. Remove the aluminium spacer and its gasket and
"O" ring from the gas valve.
9. Fit the aluminium spacer, "O" ring and its gasket to
the new valve.
10. Fit the new gas valve and reassemble in reverse
order. Test for gas soundness. NOTE: It is essential that
you ensure gas soundness as they are under negative
pressure.
13.24
1. Disconnect the condensate trap from the base of the
heat exchanger.
2. Disconnect the condensate drain (outside the boiler)
from the condensate trap.
3. Undo the condensate trap lock nut.
4. Remove the condensate trap from the boiler.
5. Disconnect the sensor leads.
Fit the new condensate trap and reassemble in reverse
order.
Changing Components
Injector Pipe (Fig. 67)
Gas Valve (Fig. 67)
1 / turn and hinge
4
Condensate Trap (Fig. 68)