2903397
24
GB
Maintenance
Boiler
Clean the boiler as indicated in its accompanying instructions in
order to maintain all the original combustion characteristics in-
tact, especially the flue gas temperature and combustion cham-
ber pressure.
Combustion
In case the combustion values found at the beginning of the inter-
vention do not respect the standards in force or, in any case, do
not correspond to a proper combustion, contact the Technical
Assistant and have him carry out the necessary adjustments.
Allow the burner to work for 10 min. and then check the combus-
tion readings with the parameters indicated within the appliance
instruction manual.
Then carry out a combustion check verify-
ing:
– Smoke temperature at the chimney;
– Content of CO
2
(%)
– Content of CO (ppm)
– Smoke value according to opacity smokes index according to
Bacharach scale
9.3
Maintenance position
Access to the combustion head, diffuser disc / electrodes
unit and nozzle
Remove the burner out of the boiler, after loosing the fixing
nut to the flange.
Hook the burner to the flange 1), by removing the combus-
tion head 2) after loosing the fixing screws 3).
Remove the diffuser disc-holder assembly 9) from the noz-
zle-holder 8) after loosing its fixing screw.
Screw the nozzle 10).
Fig. 28
4
1
D8057
D8056
2
3
5
6
Summary of Contents for G20D
Page 2: ...Original instructions...
