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INDUSTRIE
Burner Pressure C.H. and D.H.W.
8.6
To Range Rate the Boiler C.H.(not required on standard installations)
The boiler can be range rated for an output from 9.7 kW up to 23.3 kW. When the boiler is supplied it is
factory set at the maximum output 23,3 kW.
Procedure
a. Release the control panel fixing screws (fig. 30) and lower panel.
b. Loosen the screw in the burner pressure test point (fig. 22) and attach a gauge.
c. Switch on the electricity supply to relight the main burner.
Balance tube
Black cable
White cable
Fig. 22
P1
12
11 10
9 8 7 6 5 4 3 2 1
X1
13
12
P1
Fig. 24
20
Test point burner pressure
Gas valve
Modureg
Test point inlet pressure
Fig. 23
P2
6
5
4
2
1
4
3
2
1
X4
X2
9
8
7
6
5
4
3
X5
10
9
7
6
5
3
2
1
2
1
3
X7
X3
L7
P2
RY1
RY2
JP4
JP1
X8
TR1
22
20
18
16
14
12
10
8
6
4
2
0
kW
Note 1 - Modulation is available on central heating, so the
procedures must be carried out while the system is relatively
cold. Recheck boiler thermostat is set to maximum.
d. Adjust the potentiometer P1 on the PCB (fig. 24) in the
control panel until the required burner pressure is obtained
(Anticlockwise to reduce the pressure).
Note 2 - The range of inputs with corresponding burner
pressure is given on the Data badge which is situated
behind the top front panel. Further informations is on (fig.
230V
50Hz
2
1
23).
1
e. With the pressure set, turn off the electrical supply and
X6
2AT
mark the set input on the Data badge (with sticker supplied).
F1
RY4
Burner Pressure C.H. and D.H.W.
P1 = C.H. range rating to be set on site (if required)
P2 = D.H.W. temperature (factory set, not be adjusted)
Pressure
settings
Natural Gas
L.P.G.
9.7
12.8
23.3
Minimum
mbar
2.7
7.9
28.6
Maximum
mbar
14.5
36.0
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