Installation Manual
Combi - cod. 99943NA – November 2002
12
GAS TYPE CONVERSION
Conversion of the boiler
from natural gas to LPG
and vice versa must be
performed by qualified
personnel only.
Conversion is performed
as follows:
a) turn off the main power
switch;
b) close the gas cock;
c) substitute the jets on
the main burner as
follows:
•
undo the gas pipe 5
(fig.1) from the burner
manifold using a size
24 spanner;
•
separate the burner
manifold 2 from the
burner ramps 1 by
undoing the 4 screws 3
using a Philips
screwdriver;
•
fit new jets 4 to the
burner suitable for the
type of gas the boiler
will run on using a no. 7
spanner. The jets must
be fitted with new
gaskets;
•
reassemble the entire burner unit. Use the soapy water method to check for gas leaks each time gas connections are
dismantled and reassembled;
d) change the spring 6 (fig.2) to suit the type of gas used. The spring is located inside the stabiliser in the gas valve 8. To
change the spring, open the fastening clips 2 and, after unhooking the coil 1, remove the modulator core 7 and change the
spring; once this has been done reassemble everything;
e) move the jumper on the circuit board to suit the type of gas (fig.4).
f) replace the gas setting plate that indicates the type of gas and nominal pressure for the boiler. When converting the boiler to
work with a different type of gas, remove the existing plate and replace it with the new one supplied in the conversion kit.
g) calibrate the new max. and min. settings for the modulator.
DATA TABLE
Models:
RSF 20 E
NATURAL GAS G 20
LIQUID BUTAN GAS G 30
LIQUID PROPANE GAS G 31
Lower Wobbe index (15°C; 1013 mbar)
MJ/m3n
45.67 80.58
70.69
Rated feed pressure
mbar(mm c.w.)
20(204) 30(306)
37(377)
Minimum feed pressure
mbar(mm c.w.)
17(173.4) 20(204)
25(255)
Main burner: 13 jets - Ø jet
mm.
1.25 0.75
0.75
Consuption (15°C; 1013 mbar)
mc/h.
2.8
Consuption (15°C; 1013 mbar)
Kg/h.
2.10 2.07
Models:
RSF 24 E
NATURAL GAS G 20
LIQUID BUTAN GAS G 30
LIQUID PROPANE GAS G 31
Lower Wobbe index (15°C; 1013 mbar)
MJ/m3n
45.67 80.58
70.69
Rated feed pressure
mbar(mm c.w.)
20(204) 30(306)
37(377)
Minimum feed pressure
mbar(mm c.w.)
17(173.4) 20(204)
25(255)
Main burner: 13 jets - Ø jet
mm.
1.25 0.77
0.77
Consuption (15°C; 1013 mbar)
mc/h.
3.15
Consuption (15°C; 1013 mbar)
Kg/h.
2.35 2.32
1
2
3
4
5
11
10
8
7
6
9
4
3
1
11
10
2
5
5
13
12
4
7
5
8
6
1
2
3
LEGEND
:
1.
Gas valve mod. VK4105A
2.
Pressure modulator
3.
Inlet pressure point
4.
Outlet pressure point
5.
Electronic ignition board
6.
Gas pipe
7.
Burner manifold
8.
13 ramp gas burner
9.
Injectors
10.
Ignition electrodes
11.
Flame ionisation electrodes
12.
Ignition board fastening screws
13.
Ignition board cover
LEGEND
:
1.
Modulating coil
2.
Fastening clips
3.
Min. gas pressure adjustament srew
4.
Max. gas pressure adjustament core
5.
Core lock nut
6.
Calibrator spring (blue natural gas) (grey L.P.G.)
7.
Pressure modulator
8.
Gas valve stabiliser
GAS BURNER UNIT
PRESSURE MODULATOR
Link Jumper on RAMIRE
ciruit board
Fig. 1
Fig. 2
Fig. 3
Fig. 4
Fig. 5
Summary of Contents for RSF 24 E
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