Pressure/heat output diagram for natural gas (G20)
11
10
9
8
7
6
5
4
3
2
1
8, 1 (7.000) 11,6 (10.000)
17,4 (15.000)
Pressure/heat output diagram for butane gas (G30)
30
25
20
15
10
5
8, 1 (7.000) 11,6 (10.000)
17,4 (15.000)
Pressure/heat output diagram for propane gas (G31)
35
30
25
20
15
10
5
8, 1 (7.000) 11,6 (10.000)
17,4 (15.000)
30
25
23,2 (20.000)
29,0 (25.000)
HEAT OUTPUT kW (kcal/h)
POTENZA TERMICA kW (kcal/h)
25
30
23,2 (20.000)
29,0 (25.000)
HEAT OUTPUT kW (kcal/h)
POTENZA TERMICA kW (kcal/h)
Fig. 22/a
25
30
23,2 (20.000)
29,0 (25.000)
HEAT OUTPUT kW (kcal/h)
POTENZA TERMICA kW (kcal/h)
Fig. 22/b
4.3
ADJUSTMENT OF HEAT
OUTPUT FOR HEATING
To adjust boiler heat output for heating pur-
poses, i.e., modifying the setting made at the
factory which is approximately 16 kW, use a
screwdriver to adjust the heating heat out-
put trimmer (10 fig. 17).
To increase working pressure, turn the trim-
mer clockwise; to reduce pressure, turn the
trimmer counterclockwise.
To facilitate the operations of adjusting heat
output, see the pressure/heat output dia-
grams for natural gas (methane) and buta-
ne or propane gas (figg. 22 - 22/a - 22/b).
4.4
GAS CONVERSION
Fig. 22
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 chan-
ging over from one gas to another (fig. 23):
– Close the gas cock.
– Slide out the burner unit.
– Replace the main nozzles delivered with
the kit (6), inserting the copper washer
(4). Use a 7 spanner to perform this
operation.
– Insert the "GPL-MET" connector link on
the card and set it on "GPL" (7 fig. 17).
– To set the values of maximum and mini-
mum gas pressure, follow the instruc-
tions given in section 4.2, according to
the type of gas valve used.
When the working pressures have
been adjusted, reseal the regulators.
– After have ultimated the conversion of
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
WARNING: To ensure a perfect seal,
always use the washer (4) supplied
in the kit when replacing nozzles,
even in burner units for which it is
not specified.
Fig. 23
99