PRESTIGE 42-50-75-100-120 Solo : A1007856 - 664Y6200 • G
en
42
EN
FR
NL
ES
IT
DE
PL
RU
MAINTENANCE
REMOVAL AND INSTALLATION OF THE BURNER
Set-up conditions
• Boiler shut down
• External power supply isolated
• Gas supply closed
• Front and top panels removed (refer to “Removal and Installation of the Front and Top Panels”
on page 32), as required.
• Electrode removed (refer to “Removal, Check and Installation of the Burner Electrode” on page 41).
Removal procedure
1. Disconnect the plugs from the fan assembly (
5
) and from the gas valve (
6
).
2. Disconnect the air inlet (
8
).
3. Release the gas connection (
7
).
4. Disconnect the fan assembly (
5
) from the burner hood (
1
) by unscrewing the screw at the fan
seal clamp (
3
). Discard fan seal.
5. Using an open-end spanner, release the burner hood attaching nuts (
2
) and retain for reinstal-
lation.
6. Lift the burner assembly with the burner hood insulation (
10
). For the Prestige 42-50-75 Solo,
rotate it slightly to get it out of the exchanger.
Try not to damage the insulation block in the exchanger, nor the burner hood.
7. Check the insulation block condition and replace it if required.
Check that there is no discoloured or cracked area on the burner hood. If there is, contact
ACV's maintenance department.
8. Remove and replace the seals and gaskets.
9. If required, clean the exchanger, see “Cleaning the Exchanger” on page 44.
Installation procedure
1. Reinstall the burner hood insulation block (
10
) under the burner hood (
1
).
2. Reinstall the burner assembly into the exchanger.
3. Install the attaching nuts (
2
) and fasten them in a crosswise pattern at the required tightening
torque (refer to “Torque Values” on page 44).
4. Reinstall the fan assembly (
5
), with the new fan seal (
3
), on the burner hood (
1
) by torquing the
screw on the fan seal clamp (
4
). Refer to “Torque Values” on page 44.
5. Reconnect the gas connection (
7
).
6. Reconnect the air inlet (
8
).
7. Connect the plug(s) on the gas valve (
6
) and fan assembly (
5
).
Follow-on tasks
1. Install the electrode on the burner assembly, refer to “Removal, Check and Installation of the
Burner Electrode” on page 41
Detail of burner components
1. Burner hood
2. Attaching nuts
3. Fan seal with check valve
4. Fan clamp with 1 attachment screw
5. Fan assembly
6. Gas valve / Venturi assembly
7. Gas connection
8. Air inlet
9. Burner tube
10. Burner hood insulation
11. Flame sight glass
12. Electrode assembly
