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Initial start-up 66

Code No. 549758

Rev. nº 10/0418

9.2.1. Adjusting the position of the Venturi. Models ED260, ED340, ED460, ED660

 Stop the machine.

 Switch off or close and mechanically lock the power supply and the manual gas inlet valve.

 Wait a reasonable time to ensure that there are no high temperature surfaces inside the machine.

 Remove the back cover (ED260 and ED340) or the intermediate back cover (ED460 and ED660) or the

upper rear left-hand side cover (ED900 and ED1250) as appropriate.

 Loosen the Allen screw (C, Fig. 9.2 and 9.3) and adjust the position of the Venturi body (B).

In ED260, ED340, ED460, ED660 models:

 Moving the Venturi upwards: increases the combustion air flow.

 Moving the Venturi downwards: reduces the combustion air flow.

In ED900, ED1250 models:

 Moving the Venturi towards the burner: increases the combustion air flow.

 Moving the Venturi towards the injector: reduces the combustion air flow.

Fig. 9.2

Fig. 9.3

 As a guide:

 The lack of combustion air produces an orange flame and the combustion is smoky.

 An increase in combustion air produces a blue flame. If air flow is excessive, it tends to separate the

flame from the burner.

 Set the position of the Venturi.

 Replace all the covers and connect the electricity and gas supply.

 Repeat the initial test and analyse the combustion products (Fig. 9.1).

 Repeat the operations described as many times as necessary in order to achieve combustion values

consistent with the current requirements in the country where the dryer is installed.

It is advisable to keep a log of the gas analyser readings along with the machine’s technical documentation.

9.3. Machines with electric heating

Check that the machine’s power consumption is correct and consistent with the values set out in the table in

Section 4.4.

GIRBAU ED900 User Manual

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