Potterton Suprima 100L, Installation & Service Instructions Manual

Page: 26 / 100

Supplied By www.heating spares.co Tel. 0161 620 6677
Publication No. 5102696 26
4.3.7 Gas Valve 30 - 80 models
Gain General Access - See 4.1
1. Pull off the electrical connector at the valve.
2. Remove the gas cock by unscrewing the
four long hexagonal head screws from the
base of the valve.
3. Remove the burner - See 4.3.4.
4. Remove the screw securing the controls
assembly to the top of the valve.
5. Remove the two screws securing the side
and rear insulation assembly to the front of
the chassis and remove assembly.
6. Remove the three screws securing the gas
valve manifold assembly to the chassis and
remove the complete assembly.
7. Remove the three M5 x 16mm screws
securing the gas manifold to the gas valve.
8. Use a new 'O' ring and refit the manifold to
the new gas valve.
9. Re-assemble in reverse order, use a new
side panel gasket and 'O' ring in the gas
cock.
10. Check that the burner pressure is in
accordance with the information on the
boiler data badge. If adjustment is required,
turn the pressure adjusting screw anti -
clockwise to increase pressure or clockwise
to decrease.
To Service the Boiler & Component Replacement
Fig. 18
Gas Pressure
adjuster