41
Once the gas pressure is set turn off the boiler and re-
connect the detection electrode.
NB.: It may be necessary to reset the flame failure reset
a number of times during this operation.
Remove the pipe from the test point and tighten the
screw “C” to the pressure test point in order to seal off
the gas. Carefully check the pressure test points for gas
leaks (valve inlet and outlet), reconnect the
compensation pipe D1.
IMPORTANT!
Whenever you disassemble and reassemble the gas
connections, always check for leaks using a leak
detection fluid.
N
OTE
:
ALWAYS CHECK THE GAS RATES FOLLOWING
ADJUSTMENT
.
Natural gas G20
Butane L.P.G. G30
Propane L.P.G. G31
Gas rate max....................................................
3.52 m
3
/h
2.63 kg/h
2.58 kg/h
Gas rate min.....................................................
1.2 m
3
/h
0.89 kg/h
0.88 kg/h
Nominal inlet pressure .....................................
20 mbar
28 mbar
37 mbar
Burner injector diameter...................................
1.23 mm
0.74 mm
0.74 mm
Gas valve restrictor diameter ...........................
9.0 mm
9.0 mm
9.0 mm
16.1
Changing the Type
of Gas
The boiler can be converted to use either methane (natural) gas
(G20) or LPG (G30 - G31) by an Authorised Service Centre.
The operations that must be performed are the following:
1.
Adjust the maximum and minimum thermal capacity values for the
boiler (see table below).
Minimum Pressure
Nominal Pressure
G20
G30-G31
G20
G30-G31
2.7
12.5
12.5
27.9
(1 mbar = 10.197mm column of water)
The outlet pressure of the gas cock is obtained by completely loosening the screw on the solenoid. The maximum pressure of the gas
to the burner will be equal to the nominal delivery pressure minus the head loss within the gas valve.
Genus 30 Plus
Maximum Heating Circuit Power
Gas :
G20
PROPANE
BUTANE
Output
Inlet
Inlet
Inlet
(kW)
Pressure
Pressure
Pressure
(mbar)
(mbar)
(mbar)
8
0.7
7.1
5.6
12
1.6
15.3
11.5
16
2.8
21.7
15.2
20
4.4
29.5
21.3
24
6.3
30.2
23.5
28
8.6
Summary of Contents for GENUS 30 Plus
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