Potterton Suprima 30, Installation And Service Instructions Manual

Page: 28 / 37

To Service the Boiler & Component Replacement - Page 28
Gas Valve
S
U
P
0
0
1
1
B
Inlet
Pressure
Test Point
Burner Suppor t
Bracket
Burner
Support
Bracket
Securing
Screws
Manifold
Burner
Pressure
Test Point
Gas
Pressure
Adjuster
Electrical
Connector
Side
Casing
Gasket
Side Casing
Side Casing to
Manifold-
Gas Valve
Securing
Screws (3 off)
Side casing to
Manifold-Gas Valve
Securing Holes (3 off)
Gas Valve Gas Valve Gas Valve
Closed Open
Gas Valve
Gas Cock
'O' Ring
Securing
Screws
Gas Cock
Manifold
'O' Ring
Injector
Securing Screws
M5 x 16mm
none standard
(Manifold to
Gas Valve)
Manifold
4.3.7 Gas Valve
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.