For more information, see
Remounting the burner, page 105
10.2.5 Cleaning the siphon
1. Remove the burner.
2. Access the siphon.
3. Disconnect the pipe coming from the combustion chamber (SIRIUS
THREE FS 50 and SIRIUS THREE FS 70 only).
4. Disconnect the pipe from the flue gas exchanger.
5. Disconnect the condensates discharge pipe.
Important
Use a pair of pliers to remove the spring tightening clamps.
6. Remove the siphon from the heating body by taking out the retaining
screw with a cross-head screwdriver.
7. Clean the bottom of the siphon with water.
8. Completely fill the siphon.
Danger
Fill the siphon to the top. If the siphon is empty, there is a danger
of poisoning by combustion products.
9. Put the siphon back on the heating body and put the retaining screw
back in place with a cross-head screwdriver.
10. Reconnect the pipe from the combustion chamber, the pipe from the
flue gas exchanger and, finally, the condensates discharge pipe.
Important
Use a pair of pliers to put the spring tightening clamps back in
place.
11. Remount the burner.
For more information, see
Accessing the internal boiler components, page 36
Remounting the burner, page 105
10.2.6 Remounting the burner
1. Remount the pipe connecting the gas valve to the Venturi unit.
2. Remount the burner, the Venturi and the fan.
Important
Do not forget to remount the igniter on the burner.
Caution
Respect the torque on the burner fastening nuts: 5 N.m +/- 0.5.
Caution
Always use a new tightness gasket to reconnect the gas supply.
3. Reconnect the ignition electrode, the safety thermostat on the
combustion chamber door and the flame detection sensor.
4. Open all valves.
5. Check the tightness of the burner using a leak detection spray.
6. Put the covers back in place on the boiler.
Important
For the SIRIUS THREE FS 50 and SIRIUS THREE FS 70 models,
put the panel located in front of the burner back in place.
7. Reconnect the earth wire.
8. Re-commission the boiler.
Fig.124 Removing the siphon
MW
-3
0
0
0
1
0
4
5
4
3
10 Maintenance
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