86
4.5
GAS CONVERSION
A kit is supplied complete with the necessary
change-over materials for operation with
butane gas (G30) or propane gas (G31).
Operate in the following manner for changing
over from one gas to another (fig. 22):
–Close the gas cock.
–Slide out the burner unit.
– Replace the main nozzles (6) supplied in a
kit, inserting the copper washer (4). Use
a ø 7 spanner to perform this operation.
– Remove the “METANO/GPL” connector
link on the card and set it on
“GPL”
(4
fig. 15).
–To set the values of maximum and mini-
mum gas pressure, follow the instruc-
tions given in section 4.3.
When the working pressures have
been adjusted, reseal the regulators.
–After have ultimated the conversion of
the boiler, please stick onto the casing
panel the plate showing the relevant fee-
ding gas which is included into the kit.
NOTE: When reassembling components
which you have removed, replace gas seals;
test all gas connections after assembly
using soapy water or a product made spe-
cifically for the purpose, being sure not to
use open flame. Transformation must be
performed by authorised personnel only.
4.6
DISMANTLING THE SKIRT
The skirt may be removed completely to facili-
tate boiler maintenance, as shown in fig. 23.
4.7
CLEANING AND
MAINTENANCE
Carry out the cleaning of the generator in
the following way:
–Turn the main switch off to stop electric
power reaching the boiler and close the
gas feed cock.
–Remove the outer casing and the gas
burner manifold unit . To clean the bur-
ner, blow in a jet of air, so as to remove
any dust particles that may have accu-
mulated.
–Clean the heat exchanger, removing any
dust or residue from combustion. When
cleaning the heat exchanger or the bur-
ners, chemical products or steel bru-
shes MUST NOT BE USED.
Make sure that the tops of the burners
wit h t he holes ar e fr ee fr om
encrustations.
–Reassemble the items removed from
the boiler, making sure to follow the cor-
rect sequence.
–Check operation of the main burner.
–After assembly of all the gas connec-
t i o n s , t h e s e m u s t b e t e s t e d f o r
soundness, using soapy wat er or
appropriate products. DO NOT USE
Fig. 22
KEY
1 Swivel connection 1/2”
2 Locknut 1/2”
3 Burner manifold
4 Washer ø 6.1
5 Burners
6 Nozzle M6
7 Screw
25
20
15
10
8,1 (7.000) 11,6 (10.000)
17,4 (15.000)
23,2 (20.000)
POTENZA TERMICA kW (kcal/h)
PRESSIONE UGELL
O mbar
30
35
7
29,0 (25.000)
25
30
Fig. 21/b
Pressure/heat output diagram for propane gas (G31)
N
OZZLE
PRESSURE
mbar
HEAT OUTPUT kW (kcal/h)
1
2
Fig. 23
