42
GB
0,00
2,00
4,00
6,00
8,00
10,00
12,00
14,00
mbar
0
200
400
600
800
1000 1200 1400 1600 1800 2000
kW
G20
G30-
G31
Fig.1
DG
If the burner is to operate inside the operating range where a gas diaphragm is
present, you must install it.
2)
Gas reduction diaphragm - (G 1300)
When the maximum power of the burner is selected inside the shaded area (see Fig. 1), to increase the gas pres-
sure signal in order to maintain the gas signal and air signal ratio within the operational limits of the valve, insert
the gas reduction diaphragm (DG) provided with the burner.
Shaded area.
Work area with gas
reduction diaphragm
Work area without gas reduc-
tion diaphragm
Assembly of the gas reduction diaphragm - (G 1300)
To insert the gas reduction diaphragm disassemble the combustion head as indicated in the “MAINTENANCE”
chapter, section “Burner opening and access to the combustion head
1 - Remove the rubber gasket (G) (Fig. 2)
2 - Insert the DG reduction disk inside the gas flange ring (part A, Figure 3).
At the end of the operation the DG reduction disk must be installed as in Figure 3.
1 - Remove the rubber gasket G
2 - Insert the DG reduction disk inside the
gas flange ring (part A, Figure 3).
Fig.3
A
Fig.2
