Zanussi ZGF 643 manual Adaptation to different types of gas, By-pass screw

6. Adaptation to different types of gas

INJECTORS REPLACEMENT

•Remove the pan supports.

•Remove the burner's caps and crowns.

•With a socket spanner 7 unscrew and remove the injectors (Fig. 7), and replace them with the ones required for the type of gas in use (see table 2).

•Reassemble the parts, following the same procedu- re backwards.

•Replace the rating label (placed near the gas supply pipe) with the relevant one for the new type of gas supply. You can find this label in the package of the injectors supplied with the appliance.

Should the feeding gas pressure be different or variable compared with the required pressure, an appropriate pressure adjuster must be fitted on the gas supply pipe, in compliance with the rules in force.

ADJUSTMENT OF MINIMUM LEVEL

To adjust the minimum level of the burners, proceed as follows:

•Light the burner.

•Turn the knob on the minimum position.

•Remove the knob.

•With a thin screwdriver, adjust the by-pass screw (see Fig. 8). If changing from natural gas to LPG, completely tighten clockwise the screw, until a small regular flame is obtained.

•Finally check the flame does not go out when quickly turning the knob from the maximum position to the minimum position.

This procedure can easily be carried out, anyhow the hob has been positioned or built in the working top.

Table 2 : injectors - (*) suitable for G25 too.

Fig. 7 FO 0392

Fig. 8

By-pass

screw

Table 1 : BY-pass diameters

Burner	Ø By-pass	Tap
	in 1/100	colour
	of mm.
Auxiliary	28	White
Semi-rapid	32	Blue
Rapid	40	White/Red

BURNER	NORMAL	REDUCED			NORMAL
	POWER	POWER			POWER
	kW	kW	NATURAL GAS			LPG
			G20 - 20 mbar		28-30/37 mbar
			inj. 1/100	m3/h	inj. 1/100	g/h - G30	g/h - G31
Auxiliary (small)	1	0,33	70*	0,095	50	72		71
Semi-rapid (medium)	2	0,45	96*	0,190	71	145		143
	Natural gas :
Rapid (big)	3	0,65	119*	0,286	86	203		200
	LPG : 2,8

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