Potterton Osprey CF 125, Installation & Service Instructions Manual, Page: 23 / 30

Service & Replacement of Parts - Page 23
4.7 Gas Valve
•
Gain General Access - See 4.1
1. Remove burner assembly - See 4.6
2. Disconnect gas valve lead.
3. Unscrew pilot tube and thermocouple.
4. Remove inlet and outlet plates.
5. Re-assemble in reverse order.
6. Check burner pressure and gas rate against the data
badge using the pressure test point and gas meter,
shown in Fig. 13.
4.8 Pilot Interrupter
•
Gain General Access - See 4.1
1. Remove interrupter wires from overheat thermostat.
2. Unscrew thermocouple.
3. Re-assemble in reverse order.
4.9 Pilot Assembly
•
Gain General Access - See 4.1
1. Unscrew igniter.
2. Unscrew thermocouple and pilot tube.
3. Remove 2 screws and remove pilot assembly.
4. Re-assemble in reverse order.
4.10 Burner
•
Gain General Access - See 4.1
1. Remove burner assembly - See 4.6
2. Remove burner insulation.
3. Unscrew 3 screws in burner plate and remove burner.
4. Re-assemble in reverse order.
4.11 Cleaning Heat Exchanger
•
Gain General Access - See 4.1
1. Remove burner assembly - See 4.6
2. Remove 4 wing nuts holding top panel on.
3. Remove brush from holder and clean as required.
4. Re-assemble in reverse order.
Note: If insulation is to be removed wet first to reduce fibre
breakdown.
Important: After any work carried out involving gas carrying
components a full gas soundness test procedure should be
carried out in accordance with BS 6891.