Ferroli Domina 80 E Installation, Service And User Instructions Manual page 45

11. Take off the combustion chamber cover by removing the three securing screws.
12. Lift off flue hood and flue baffle plate.
13. Pull off the ignition and flame rectification leads from their respective electrodes.
14. Undo the gas union in the centre of burner rail and take out the two securing screws. Remove the
burner rail and clean rail and injectors.
15. Remove two screws securing the burner assembly and remove the assembly. Clean burners.
16. Clean heat exchanger with a soft brush.
17. Re-assemble baffle, flue hood and fan assembly, secure with screws previously removed.
18. Refit burner assembly and burner rail.
19. Reconnect ignition and flame rectification leads.
20. Reconnect gas union and tighten.
21. Refit combustion chamber cover, secure with screws.
22. Examine seals on room sealed cover refit cover and secure with screws.
23. Turn on gas and electricity.
24. Fire boiler and check all gas joints for soundess.
25. Check flame picture and all controls for correct operation.
26. Check room sealed cover for leakage.
27. Check domestic water flow rate and temperature is within specifications.
28. Check operation of all safety cut off devices.
29. If a combustion analyser is to be used there are test points provided on the front of the room sealed
cover. The right hand grommet is for air and the left hand one is for flue gas. The boiler must reach
operating temperature before this test is carried out (normally 10-15 minutes). CO/CO2 ratio should
not exceed 0.0080. Immediatly after servicing (0.0040 at any other time)
30. Refit case and secure with screws.
31. Leave boiler set to customers requirements.
6.04 Flue Gas Analysis
1. The appliance should be checked visually
for obvious defects.
2. After removing the jacket on the boiler
there are two test point, one for flue gas
and the other for air.
3. Open the air and flue gas test points;
4. Introduce the probes as far as the retainer;
5. Turn on the hot water tap;
6. Turn the domestic hot water stat to maxi-
mum;
7. Allow the boiler to reach thermal equilib-
rium (10 - 15 min.);
8. Take reading;
9. The CO/CO ratio should be 0.0040 or be-
2
low. If the reading is above this then a full
strip down service must be carried out and
the cause remedied.
10. Following a full strip down service and af-
ter reaching thermal equilibrium the permis-
sible reading is 0.008 or below.
N.B.: To ensure correct readings the boiler must have reached normal operating temperature. Testing the
boiler before thermal equilibrium has been attained will give incorrect readings.
N.B.: If you have only 1 probe, measure separately air and flue gas, close the test point not in use.
DOMINA 80 E
AIR
FLUE
Fig. 34
45