Ariston PK640RGH Operating Instructions | Page 9

Ariston Cooktop Operating Instructions - PK640RGH.
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indicated and must comply with current electrical regulations 

(the earthing wire must not be interrupted by the circuit-

breaker). The supply cable must not come into contact with 

surfaces with temperatures higher than 50°C.

! The installer must ensure that the correct electrical 

connection has been made and that it is compliant with 

safety regulations.

Before connecting to the power supply, make sure that:

•  The appliance is earthed and the plug is compliant with 

the law.

•  The socket can withstand the maximum power of the 

appliance, which is indicated on the data plate.

•  The voltage is in the range between the values indicated 

on the data plate.

•  The socket is compatible with the plug of the appliance. 

If the socket is incompatible with the plug, ask an 

authorised technician to replace it. Do not use extension 

cords or multiple sockets.

! Once the appliance has been installed, the power supply 

cable and the electrical socket must be easily accessible.

! The cable must not be bent or compressed.

! The cable must be checked regularly and replaced by 

authorised technicians only (see Assistance).

! The manufacturer declines any liability should these safety 

measures not be observed.

Gas connection

Check The Gas Type

! Before installation, check that the gas type (natural gas 

or Universal LPG) of the cooker is suitable for the gas type 

available to the installation. It is extremely dangerous to use 

the wrong gas type with any appliance, as fire or serious 

injury can result.

This cooker is supplied from the factory already set for 

Natural Gas. To convert the cooker to LPG (or back to 

Natural Gas from LPG), follow the directions later in this 

section.

Fit regulator supplied for Natural Gas (if applicable) at rear 

of appliance, and as close as practicable to the appliance.

It is recommended that an isolating valve and union be 

fitted, to enable simple disconnection for servicing. These 

are to be in an accessible location.
! Check that the pressure of the gas supply is consistent 

with the values indicated in Table 1 (“Burner and nozzle 

specifications”). This  will  ensure  the  safe  operation  and 

longevity  of  your  appliance  while  maintaining  efficient 

energy consumption.

Pipe or Hose Connection

This  appliance  is  suitable  for  use  with  either  a  flexible 

connection or rigid copper connection.

Either a rigid metal pipe with fittings in compliance with the 

standards in force must be used for connecting to the nipple 

union (threaded ½”G male fitting) situated at the rear of the 

appliance to the right (fig.8), or an approved flexible hose 

of class B or D.

Should it be necessary to turn the fitting, the gasket 

(supplied with the appliance) must be replaced.

If a flexible hose is used, it should be as short as possible 

with a maximum length of 1.2 metres;

•  The flexible connection must be approved to class B or 

D of AS/NZS1869 as a minimum.

•  it should not be bent, kinked or compressed;

•  it  should  not  be  in  contact  with  the  rear  wall  of  the 

appliance or in any case with parts which may reach a 

temperature of 50°C;

•  it should not come into contact with pointed parts or sharp 

corners;

•  it should not be subject to any pulling or twisting forces;

•  it should be easy to inspect along its entire length in order 

to be able to check its condition.

•  The supply connection point must be accessible with the 

appliance installed.

•  The inner diameters of the pipe are as follows:

  8 mm for LPG;

  13 mm for Natural Gas.

Checking the tightness of the connection

Upon completion of installation, check the gas circuit, the 

internal connections and the taps for leaks using a soapy 

solution (never a flame). Also check that the connecting pipe 

cannot come into contact with moving parts which could 

damage or crush it. Make sure that the natural gas pipe is 

adequate for a sufficient supply to the appliance when all 

the burners are lit

Duplicate Data Plate

Where the data plate is obscured by cabinetry when the 

cooker is in the installed position, place a duplicate data 

plate on a surface of the cabinetry adjacent to the cooker.
Adapting to different types of gas
To adapt the hob to a different type of gas other than default 

type (indicated on the rating plate at the base of the hob or 

on the packaging), the burner nozzles should be replaced 

as follows:
1. Remove the hob grids and slide the burners off their 

seats.

2. Unscrew the nozzles using a 7 mm socket spanner, and 

replace them with nozzles for the new type of gas (see 

table 1 “Burner and nozzle characteristics”).

3. Reassemble the parts following the above procedure in 

the reverse order.

4. Once this procedure is finished, replace the old rating 

sticker with one indicating the new type of gas used. 

Sticker are available from any of our Service Centres.

Replacing  the  nozzles  on  separate  “double  flame  “ 

burners

1. Remove the grids and slide the burners from their 

housings. The burner consists of 2 separate parts (see 

figure);

2. Unscrew the burers with a 7 mm wrench spanner. The 

internal burner has a nozzle, the external burner has 

two (of the same size). Replace the nozzle with models 

suited to the new type of gas (see table 1).

3. Replace all the components by repeating the steps in 

reverse order.

AUS

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