Hoover HGH 640 B, HGH 640 W, HGH 640 SX Setting Of The Gas Burners, Regulating The Minimum Flame

Models: HGH 640 SW HGH 640 B HGD 750 SGH HGD 640 SGH HGH 640 X HGD 750 GH HGH 640 SB HGD 640 GH HGD 750 X HGH 640 SX HGH 640 W

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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

 

G31

G30 29mbar

 

 

 

 

25mbar

 

 

 

 

 

 

G31 37mbar

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Working

Ø gas jet

Ø gas jet

STD. Dim

l/h

g/h

g/h

 

Qn

l/h

min.Dim

reg.

 

reg.

reg.

 

reg.

burner

1/100 mm

1/100 mm

kW

G20

G30

G31

 

kW

G25

kW

air

 

air

air

 

air

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

large

120

80

2,65

252

193

189

 

2,5

277

0,65

4 mm

 

2 mm

4 mm

 

5 mm

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

medium

93

61

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

 

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

 

15 mm

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SETTING OF THE GAS BURNERS

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

 

 

 

 

AIR REGULATION

 

 

SCREW

 

 

DOUBLE RING

 

 

MAXI

Fig. 7

 

FISH

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

8

IE GB

Page 9
Image 9
Hoover HGH 640 B manual Setting Of The Gas Burners, Regulating The Minimum Flame, Screws regulating for differend models