28
for the technician
First firing, regulation and servicing instructions
Gas transformation
ATTENTION: the operations described below must be carried out only by qualified
personnel [authorized from HERMANN Ltd].
For gas conversion, use the nozzles supplied by boiler manufacturer only.
Using LPG, it is absolutely necessary to install a pressure reducer upstream the boiler.
1. while boiler is not working (green light flashing), select
parameter 1. Push knobs
or according
to:
0 for natural gas working
1 for LPG working
and store pressure pushing
;
2. Check that pressure and gas input are enough to
guarantee the correct functioning of the appliance.
3. Disconnect the boiler from the supply.
4. Remove front cover: unscrew screws located above
boiler, shift small blocking plate [1], remove front cover
[2] lifting it up. On “SE” models, open sealed combustion
chamber.
5. Disassemble pipe connecting Gas valve with burner.
6. Remove ramp containing nozzles and substitute it with
correct one, using a 7mm spanner. Reassemble ramp
and pipe, substituting gaskets. On “SE” models, close
sealed combustion chamber.
LEDOM
forebmuN
selzzon
02GSAGLARUTAN13G/03GGPL
ØselzzoN
)mm001/1(
erusserpsaG
)rabm(
ØselzzoN
)mm001/1(
erusserpsaG
)rabm(
ES/E32ARUE31021
02
57
73/03ES/E82ARUE5102157
ES23ARUE5103177
7. Check, with burner ON, that there are no gas leaks and that the pressure upstream the boiler
is:
Natural gas: min.17 – max. 25 mbar
Buthane: min. 25 – max 35 mbar
Propane: min. 25 – max 37 mbar
RAMP AND NOZZLES
REMOVAL
1
2
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