Setting of the GAS Burners

Table of gas consumption

1W = 0,860 kcal/h

X dimension according

to Gas type

G20/G25

G30

G20 20mbar

G25

G20

G30

G25

G31

G30 29mbar

25mbar

G31 37mbar

Working

Ø gas jet

STD. Dim

l/h

g/h

l/h

min.Dim

reg.

burner

1/100 mm

G20

G30

G31

G25

air

large

120

2,65

252

193

189

2,5

277

0,65

4 mm

2 mm

4 mm

5 mm

medium

1,5

143

109

107

1,45

161

0,38

2 mm

5 mm

2 mm

7 mm

maxi

2x94

2x65

3,3

314

238

236

3,1

343

0,9

15 mm

0 mm

15 mm

double ring

2x94

2x65

3,3

314

238

236

3,1

343

0,9

13 mm

0 mm

13 mm

15 mm

fish

2x94

2x65

3,3

314

238

236

3,1

343

0,9

15 mm

0 mm

15 mm

When the jets have been changed it is necessary to set the correct air gap by keeping to the setting “X” as shown in the table “ gas consumption” fig 7. Warning the value of ‘ X ‘ setting varies in relation to the size of gas burner and type of gas chosen.

A good flame must be of medium length (fig.8B), excessive air will cause the flame to be short and with sharp colour (fig.8C): in this case it is necessary to extend out the tu- be for the air setting from the burner body, if there is insufficient air the flame will ap- pear weak and long (fig. 8A): in this case push the tube of the air setting back into the burner body. To adjust the air setting tube loosen the retaining screw.

Once the air is correctly set secure the screw over the tube ( fig. 7).

For dimensions «X» see table of gas consumption

	SMALL
	MEDIUM
BURNER	LARGE
	FIXING
BURNER CAP	SCREW
BURNER CAP
	AIR REGULATION
	SCREW
	DOUBLE RING
	MAXI	Fig. 7
	FISH	Fig. 7

Fig. 8

REGULATING THE MINIMUM FLAME

After lighting the burners, turn the control knob to the minimum setting and then remo- ve the knob (this can easily be removed by apply a gentle pressure).

Using a small «Terminal» type screwdriver the regulating screw can be adjusted as in Fig. 9. Turning the screw clockwise reduces the gas flow, whilst turning it anticlockwise increases the flow – Use this adjustment to obtain a flame of approximately 3 to 4 mm in length and then replace the control knob.

When the gas supply available is LPG (Bottle gas)- the screw to set the idle flame must be turned (clockwise) to the end stop.

Screws regulating (for differend models)

Fig. 9

IE GB

HGH 640 SW, HGH 640 B, HGD 750 SGH, HGD 640 SGH, HGH 640 X specifications

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