Installation Manual
Floor standing storage boiler – Cod. 99949NA – November 2002
13
CONVERSION OF
GAS TYPE
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) on boilers with pilot flame ignition, the pilot flame jet 6 (fig.3) must be changed to suit the type of gas used; undo fixing nut 8 on the thin
aluminium gas pipe 9 and change the jet;
g) 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.
h) calibrate the new max. and min. settings for the modulator.
DATA TABLE
Models:
RBA CS 24 E
RBA CS 100 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.a.)
20(204) 30(306)
37(377)
Minimum feed pressure
mbar(mm c.a.)
17(173.4) 20(204)
25(255)
Main burner: 24 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
