Removing Gas Valve - Potterton Paramount four Installation Manual

Fig.38 Removing the heat exchanger
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11. Pull the burner together with mixing tube, fan and air intake silencer
forwards and out.
12. Clean the burner pipe with a soft brush.
13. Use a new seal when installing the gas burner.
Caution
Use new seals.
When re-fitting, new seals should be used, particularly for the the
gas connecting pipe.
Caution
Make sure the spring disc is in the right position.
Make sure the spring disc is in the right position during installation.
Check the torque again after setting the burner.
Recommended torque: 9 Nm.

10.4.3 Removing gas valve

1. Remove the electrical connections from the gas valve.
2. Loosen both threaded connections on the gas valve and remove the
gas valve.
Note
Use new seals when installing the gas valve.
10.4.4 Removing the heat exchanger
Carry out the following steps if the heat exchanger has to be completely
removed.
Note
The burner must have been removed.
To make removal easier, the gas valve should also have been
removed.
1. Close disconnector valves in flow and return.
2. Drain off the boiler water.
3. Pull the plugs from boiler sensors (flow and return).
4. Loosen the screw connectors of flow and return on the heat ex­
changer (flat seal).
5. Remove the air vent.
6. Paramount four 30/40: Remove the plastic retainer from the top of
the heat exchanger. For this, remove 2 screws from the casing cover
7. Take the holding clips off.
8. Lift the heat exchanger off the flue gas collector and lift it out.
9. Pull the cable off the water pressure monitor.
10. Undo the screwed connector at the pump replacement pipe and re­
move the pipe or pump.
11. Paramount four 50/80: Remove the return pipe.
12. Pull the plug off the gas valve, loosen and remove the gas valve.
13. Paramount four 95/115: Remove the connection line between the
heat exchanger and the collector box.
14. Remove the retaining ring and push the slide coupling on the flue
pipe upwards.
15. Paramount four 50/80: Remove the gas pipe.
16. Pull the siphon off.
17
17. Loosen nuts at the collector box, remove clip and disassemble col­
lector box.
RA-0000481
18. Loosen nuts for the retaining plate on the rear wall, lift heat ex­
changer with retaining plate from the rear wall and take out.
19. Clean the heat exchanger according to the maintenance instruc­
tions.
For more information, see
Removing the gas burner, page 131
Removing gas valve, page 133
10 Maintenance
Paramount four 30 – 115 kW 133