105
sure/heat.output.for.natural.gas.(metha-
ne). and. propane. gas. are. available. (figs..
16. -. 16/a).. To. ensure. proper. operation,.
check. that. the. burner. flame. looks. like.
the.one.shown.in.fig..17..
4.5
CONVERSION TO ANOTHER GAS
For.the.functioning.with.propane.gas.(G31),.
a.kit.with.what.is.needed.for.the.conversion.
is.supplied..
To.convert.from.one.gas.to.another.follow.
the.instructions.below.(fig..17):
–. Close.the.gas.tap
–. Replace. the. main. nozzles. (6). supplied.
in. kit,. the. aluminium. washer. ø. 10. (5);.
to. carry. out. this. operation. use. a. ø. 12.
wrench.
–. Remove. the. supply. fitting. of. the. pilot.
burner.and.substitute.the.nozzle.(2).
–. Insert. the. “GPL-MET”. bridge. of. the.
connector.of.the.electronic.panel.onto.
the.“GPL”.position.(7.fig..10).
–. For. the. setting. of. the. values. of. the.
maximum. gas. pressure. and. the.
minimum. follow. the. indications. as.
specified.in.point.4.3..
.
Once the operating pressure chan-
ges have been carried out seal the
regulators.
–. The. supply. pressure. must. never. be.
greater.than.50.mbar.
–. Once. the. operations. have. been. fini-
shed. apply. the. label. with. gas. pre-
settings. supplied. with. the. kit. to. the.
shell.panel.
NOTE: After the assembly the sealing
capacity of all the gas connections must
be tested, using soapy water and special
products, and avoiding the use of naked
flames. The conversion must be carried
out only by authorised personnel.
4.6
DISASSEMBLY OF
EXPANSION VESSEL
Before. disassembly. the. expansion. ves-
sel,.empty.the.boiler.of.water..After.the.
assembly.ensure.that.the.expansion.ves-
sel.is.pre-filled.to.a.pressure.of.1.bar.
4.7
CLEANING AND MAINTENANCE
Carry.out.the.cleaning.of.the.generator.in.
the.following.way.(fig..18):
–. Remove. the. electricity. supply. to. the.
boiler.and.close.the.gas.supply.tap.
–. Dismantle.the.gas.group.completely.
–. Dismantle.the.lid;.clean.the.interstices.
of.the.boiler.structure,.going.from.the.
top. to. the. bottom. with. an. adequate.
brush.
–. In. cleaning. the. burners. chemical. pro-
ducts. or. steel. brushes. must. never. be.
used..Make.sure.that.the.top.perforated.
part.of.the.burners.is.free.of.encrusta-
tions.
–. During.the.assembly.and.disassembly.
25
20
15
10
10.000
15.000
20.000
POTENZA TERMICA kcal/h
PRESSIONE UGELLO mbar
30
35
5
25.000
30.000
22
32
Diagram pressure/heat output for propane gas (G31)
Fig..16/a
NOZZLE.PRESSURE.(mbar)
15
14
13
12
11
10
9
8
7
6
5
10.000
15.000
20.000
POTENZA TERMICA kcal/h
PRESSIONE UGELLO mbar
25.000
30.000
22
32
Fig..16
Diagram pressure/heat output for natural gas (methane)
NOZZLE.PRESSURE.(mbar)
HEAT.OUTPUT.kW.(kcal/h)
HEAT.OUTPUT.kW.(kcal/h)
Funzionamento corretto
Bruciatore
Funzionamento anomalo
7
1
2
3
4
5
6
Pretranci
da staccare
7
Fig..17
KEY
1. Pilot.burner
2. Pilot.nozzle
3. Pilot.supply.tube
4. Burner.collector
5. Aluminium.washer.ø.10
6. Main.nozzle
7. Combustion.chamber.front.panel
Correct.operation
Anomalous.operation
Burner
