Zanussi Cooktop ZGF 780 IT User Manual

Instruction  
booklet  
Gas hob  
ZGF 780 IT  
GB  
IE  
 
Contents  
Important Safety Information ................................................................... 4  
Description of the Hob...................................................................................... 6  
Instructions for the User ........................................................................... 7  
Operation ......................................................................................................... 8  
Maintenance and Cleaning ............................................................................. 11  
Something Not Working? ................................................................................ 13  
Instructions for the Installer ................................................................... 14  
Engineer technical data .................................................................................. 14  
Important safety requirements......................................................................... 16  
Installation ...................................................................................................... 18  
Gas Connection ............................................................................................. 18  
Building In ...................................................................................................... 19  
Building over a cupboard or drawer ................................................................ 19  
Building over a kitchen unit with door ............................................................. 19  
Fitting the Hob into the Worktop.....................................................................20  
Electrical Connections .................................................................................... 21  
Wiring diagram ............................................................................................... 22  
Fault Finding................................................................................................... 23  
Commissioning ............................................................................................... 26  
Conversion from Natural Gas to LPG .............................................................. 27  
Guide to Use the instructions  
The following symbols will be found in the text to guide you throughout the Instructions:  
Safety Instructions  
Step by step instructions for an operation  
)
Hints and Tips  
Environmental information  
U
This appliance is manufactured according to the following EEC directives:  
2006/95 EEC - 2004/108 EEC - 90/396 EEC, current edition.  
MANUFACTURER :  
ELECTROLUX ITALIA S.p.A.  
C.so Lino Zanussi, 30  
33080 Porcia (PN) - ITALY  
3
 
Important Safety Information  
You MUST read these warnings carefully before installing or using  
the hob. If you need assistance, contact our Customer Care  
Department on 08705 727 727.  
Installation  
z
This appliance must be installed and serviced by a competent person as  
stated in the Gas Safety (Installation and Use) Regulations Current Editions  
and the IEE Wiring Regulations.  
z
For appliances installed in the Republic of Ireland please refer to NSAI-  
Domestic Gas Installations I.S.813 Current Editions and the ETCI Rules for  
Electrical Installations.  
z
z
Remove all packaging before using the hob.  
Ensure that the gas and electrical supply complies with the type stated on  
the rating plate, located near the gas supply pipe.  
z
Do not attempt to modify the hob in any way.  
People Safety  
z
This hob is designed to be operated by adults. Do not allow children to play  
near or with the hob.  
z
This appliance is not intended for use by children or other persons whose  
physical, sensory or mental capabilities or lack of experience and knowledge  
prevents them from using the appliance safely without supervision or instruction  
by a responsible person to ensure that they can use the appliance safely.  
z
z
The hob gets hot when it is in use. Children should be kept away until it has  
cooled.  
Children can also injure themselves by pulling pans or pots off the hob.  
During Use  
z
This hob is intended for domestic cooking only. It is not designed for  
commercial or industrial purposes.  
z
This appliance is not connected to a combustion products evacuation device.  
It must be installed and connected in accordance with current installation  
regulations. Particular attention shall be given to the relevant requirements  
regarding ventilation.  
z
When in use a gas cooking hob will produce heat and moisture in the room  
in which it has been installed. Ensure there is a continuous air supply, keeping  
air vents in good condition or installing a cooker hood with a venting hose.  
4
 
z
z
z
Ensure a good ventilation around the appliance. A poor air supply could cause  
lack of oxygen.  
When using the hob for a long period time, the ventilation should be  
improved, by opening a window or increasing the extractor speed.  
Do not use this hob if it is in contact with water. Do not operate the hob with  
wet hands.  
z
z
Ensure the control knobs are in the ‘OFF’ position when not in use.  
When using other electrical appliances, ensure the cable does not come  
into contact with the hot surfaces of the cooking appliance.  
z
Unstable or misshapen pans should not be used on the hob as unstable  
pans can cause an accident by tipping or spillage.  
z
z
z
Never leave the hob unattended when cooking with oil and fats.  
Never use plastic or aluminium foil dishes on the hob.  
Perishable food, plastic items and areosols may be affected by heat and  
should not be stored above or below the hob unit.  
z
This appliance cannot be cleaned with steam or with a steam cleaning  
machine.  
Service  
z
This hob should only be repaired or serviced by an authorised Service  
Engineer and only genuine approved spare parts should be used.  
U Environmental Information  
z
After installation, please dispose of the packaging with due regard to  
safety and the environment.  
z
When disposing of an old appliance, make it unusable, by cutting off the  
cable.  
z
The symbol  
on the product or on its packaging indicates that this  
product may not be treated as household waste. Instead it shall be handed  
over to the applicable collection point for the recycling of electrical and  
electronic equipment. By ensuring this product is disposed of correctly,  
you will help prevent potential negative consequences for the environment  
and human health, which could otherwise be caused by inappropriate  
waste handling of this product. For more detailed information about  
recycling of this product, please contact your local city office, your  
household waste disposal service or the shop where you purchased the  
product.  
5
 
Description of the Hob  
3
3
5
4
1
2
6
1. Hob Top  
2. Auxiliary Burner  
3. Semi-rapid Burner  
4. Rapid Burner  
5. Triple Crown  
6. Control knobs  
6
 
Instructions for the User  
INSTALLATION  
Any gas installation must be carried out by a registered  
competent person, and in accordance with existing rules and  
regulations.  
The relevant instructions are to be found in the second section of this  
manual.  
Please, ensure that, once the hob is installed, it is easily accessible for  
the engineer in the event of a breakdown.  
WHEN THE HOB IS FIRST INSTALLED  
Once the hob has been installed, it is important to remove any protective  
materials, which were put on in the factory.  
The manufacturer will not accept liability, should the above instructions or  
any of the other safety instructions incorporated in this book be ignored.  
Keep this instruction book for future reference and ensure it is  
passed on to any new owner.  
These instructions are only valid for countries whose identification  
symbols are shown on the cover of this instruction booklet and on  
the appliance itself.  
7
 
Operation  
Hob burners control knobs  
The symbols on the knobs mean that :  
there is no gas supply (“off” position)  
there is maximum gas supply  
there is minimum gas supply  
z
Lighting the burners  
For easier lighting, proceed before  
putting a pan on the pan support.  
To light a burner:  
turn the relevant knob anti-clockwise to  
maximum position ( ), then push it  
)
z
down to ignite the burner.  
z
Upon ignition, keep the knob pushed  
down about 5 seconds. This will  
allow the "thermocouple" (see Fig.1 -  
letter D) to be heated and the safety  
device to be switched off, otherwise  
the gas supply would be interrupted.  
Fig. 1  
Triple crown burner  
z
Then adjust the flame as required.  
A
B
If the burner accidentally goes out, turn  
the control knob to the "off" position  
and wait for at least 1 minute before  
trying to light the burner again.  
If you cannot light the flame even after  
several attempts, check the "cap"  
(see Fig.1 - letter A) and the"crown"  
(see Fig.1 - letter B) are in the correct  
position.  
D
C
A - Burner cap  
To switch off a burner:  
To put the flame out, turn the knob to the  
symbol ( z ).  
B - Burner crown  
C - Ignition electrode  
D - Thermocouple  
)
z
8
 
Do not keep the control knob pressed for more than 15  
seconds.  
If the burner does not light even after 15 seconds, release  
the control knob, turn it the "off" position and wait for at  
least 1 minute before trying to light the burner again.  
When switching on the mains, after installation or a power cut, it is quite  
normal for the spark generator to be activated automatically.  
In the absence of electricity, ignition can occur without the electrical  
device; in this case, approach the burner with a flame, push the relevant  
knob down and turn it anti-clockwise until it reaches the maximum  
position.  
If the control knobs become difficult to turn, please contact your local  
Service Force Centre.  
Using the hob correctly  
To ensure maximum burner efficiency, it is strongly recommended that  
you use only pots and pans with a flat bottom fitting the size of the burner  
used, so that flame will not spread beyond the bottom of the vessel (see the  
table below).  
Burner  
minimum  
diameter  
maximum  
diameter  
Triple crown  
Large (rapid)  
180 mm  
160 mm  
260 mm  
260 mm  
Medium (semi-rapid)  
rear  
front  
120 mm  
120 mm  
220 mm  
180 mm  
Small (auxiliary)  
80 mm  
180 mm  
As soon as a liquid starts boiling, turn down the flame so that it will  
barely keep the liquid simmering.  
Use only pans or pots with flat bottom.  
If you use a saucepan which is smaller than the  
recommended size, the flame will spread beyond the bottom  
of the vessel, causing the handle to overheat.  
9
 
Carefully supervise cooking with fat or oil, since these types of  
foodstuff can result in a fire, if over-heated.  
The stainless steel can become  
tarnished if excessively heated.  
Therefore prolonged cooking with  
potstones, earthenware pans or  
cast-iron plates is inadvisable. Also,  
do not use aluminium foil to protect  
the top during use.  
Make sure pots do not protrude  
over the edges of the cooktop and  
that they are centrally positioned on  
the rings in order to obtain lower gas  
consumption.  
Do not place unstable or deformed pots on the rings: they  
could tip over or spill their contents, causing accidents.  
Pots must not enter the control zone.  
10  
 
Maintenance and Cleaning  
Before any maintenance or cleaning can be carried out, you  
must DISCONNECT the hob from the electricity supply.  
The hob is best cleaned whilst it is still warm, as spillage can  
be removed more easily than if it is left to cool.  
This appliance cannot be cleaned with steam or with a steam  
cleaning machine.  
The Hob Top  
Regularly wipe over the hob top using a soft cloth  
well wrung out in warm water to which a little  
wasing up liquid has been added. Avoid the use  
of the following:  
- household detergent and bleaches;  
- impregnated pads unsuitable for non-stick  
saucepans;  
- steel wool pads;  
- bath/sink stain removers.  
Should the hob top become heavily soiled, the  
following products are recommended:  
- For stainless steel hobs use a proprietary  
stainless steel cleaner.  
- For other hobs use Hob Brite or Bar Keepers Friend.  
Do not leave acid or alkaline substances (e.g. vinegar, salt,  
lemon juice, etc.) on the cooktop.  
The Burners  
The burner caps and crowns can be removed for cleaning.  
Wash the burners caps and crowns using hot soapy water, and remove  
marks with a mild paste cleaner. A well moistened soap impregnated  
steel wool pad can be used with caution, if the marks are particularly  
difficult to remove.  
After cleaning, be sure to wipe dry with a soft cloth.  
11  
 
Pan Supports  
Wash the pan supports using hot soapy  
water. If necessary, a paste cleaner or a soap  
impregnated steelwool pad can be used with  
caution.  
The pan supports are not dishwasher  
proof; they must be washed by hand. After  
cleaning, be sure to wipe dry with a soft  
cloth. Take care when drying them as the  
enamelling process occasionally leaves  
rough edges. If necessary, remove stubborn  
stains using a paste cleaner.  
YES  
NO  
After cleaning, make sure that the pan  
supports are correctly positioned, as  
shown in the diagram.  
Pay attention when replacing the  
pan supports in order to avoid  
damaging the hob top.  
The Ignition electrode  
The electric ignition is obtained through a  
ceramic electrode which contains a metal  
electrode (Fig. 1 letter C - page 8). Keep  
these components very clean, to avoid  
difficult lighting, and check that the burner  
crown holes (Fig. 1 letter B - page 8) are not  
obstructed.  
12  
 
Something Not Working?  
If the hob is not working correctly, please carry out the following checks  
before contacting your local Service Force Centre.  
SYMPTOM  
SOLUTION  
There is no spark when  
lighting the gas.  
Check that the unit is plugged  
in and the electrical supply is  
switched on.  
Check that the RCCB has not  
tripped (if fitted).  
Check the mains fuse has not  
blown.  
Check the burner cap and  
crown have been replaced  
correctly, e.g. after cleaning.  
The gas ring burns unevenly.  
Check the main jet is not  
blocked and the burner crown  
is clear of food particles.  
Check the burner cap and  
crown have been replaced  
correctly, e.g. after cleaning.  
If after all these checks, your hob still does not operate correctly, contact  
your local Service Force Centre.  
Please note that it will be necessary to provide proof of purchase for any  
in-guarantee service calls.  
In-guarantee customers should ensure that the above checks have been  
made as the engineer will make a charge if the fault is not a mechanical or  
electrical breakdown.  
13  
 
Instructions for the Installer  
Engineer technical data  
OVERALL DIMENSIONS  
CUT OUT DIMENSIONS  
Width:  
Depth:  
744 mm  
510 mm  
Width:  
Depth:  
560 mm  
480 mm  
SUPPLY CONNECTIONS  
Gas:  
R 1/2 inch (1/2 inch male) Rear right hand corner  
Electric:  
230 V~ 50 Hz supply, 3 core flexible cable with  
non rewireable plug fitted with a 3 amp cartridge fuse  
HEAT INPUT  
Front Left Burner  
(semi-rapid)  
Rear Left Burner  
(semi-rapid)  
2.0 kW (6826 BTU/HR)  
2.0 kW (6826 BTU/HR)  
4.0 kW (13652 BTU/HR)  
3.0 kW (10239 BTU/HR)  
1.0 kW (3413 BTU/HR)  
Central Burner  
(Triple Crown)  
Rear Right Burner  
(rapid)  
Front Right Burner  
(auxiliary)  
APPLIANCE CLASS  
APPLIANCE CATEGORY  
GAS SUPPLY  
3
II2H3+  
Natural gas G20 (2H) 20 mbar  
14  
 
Gas burners  
BURNER  
RAPID  
SEMI-RAPID AUXILIARY TRIPLECROWN  
TYPEOFGAS  
POSITION  
MAX MIN MAX MIN MAX MIN  
MAX  
MIN  
NOMINAL THERMAL  
POWER  
kW  
3.0  
0.75  
2.0  
0.45  
1.0  
0.33  
4.0  
1.2  
NATURAL GAS  
20 mbar  
NOMINAL FLOW  
RATE  
m3/h 0.286 0.057 0.190 0.038 0.095 0.028  
0.381  
146  
0.114  
VALUE =  
37.78 MJ/m3  
Ws - 50.7 MJ/ m3  
NOZZLE REFERENCE  
1/100mm  
119 Adjust.  
96 Adjust. 70 Adjust.  
Adjust.  
NOMINAL THERMAL  
LPG GAS  
28-30/37 mbar  
VALUE =  
POWER  
kW  
2.8  
0.75  
2.0  
0.45  
1.0  
0.33  
4.0  
1.2  
NOMINAL FLOW  
RATE  
g/h  
202 43.5  
86 42  
144  
71  
29  
32  
72  
50  
21,5  
28  
291  
98  
87  
56  
49.92 MJ/Kg  
NOZZLE REFERENCE  
1/100mm  
15  
 
Important safety requirements  
This hob must be installed in accordance with the Gas Safety (Installation and Use)  
Regulations (Current Edition) and the IEE Wiring Regulations (Current Edition).  
For appliances installed in the Republic of Ireland please refer to NSAI- Domestic  
Gas Installation I.S. 813 Current Editions and the ETCI Rules for Electrical  
Installations.  
Provision for Ventilation  
Detailed recommendations are contained in the following British Standards Codes  
Of Practice: B.S. 6172/ B.S. 5440, Par. 2 and B.S. 6891 Current Editions.  
The hob should not be installed in a bed sitting room with a volume of less than 20  
m3. If it is installed in a room of volume less than 5 m3 an air vent of effective area of  
100 cm2 is required. If it is installed in a room of volume between 5 m3 and 10 m3 an  
air vent of effective area of 50 cm2 is required, while if the volume exceeds 11 m3 no  
air vent is required.  
However, if the room has a door which opens directly to the outside no air vent is  
required even if the volume is between 5 m3 and 11 m3.  
If there are other fuel burning appliances in the same room, B.S. 5440 Part 2  
Current Edition, should be consulted to determine the requisite air vent requirements.  
For appliances installed in the Republic of Ireland please refer to the NSAI- Domestic  
Gas Installation I.S. 813 Current Editions Table Four.  
16  
 
Location  
The hob may be located in a kitchen, a  
kitchen/diner or bed sitting room, but  
not in a bathroom or shower room.  
600  
M
IN.  
Ensure that there is a minimum distance  
of 55 mm between the rear cut out edge  
and the wall.  
A minimum distance of 450 mm must  
be left between the side edges of the  
cut out and any adjacent cabinets or  
walls.  
The minimum distance combustible  
material can be fitted above the hob in  
line with the edges of the hob is 400  
mm If it is fitted below 400 mm a space  
of 50 mm must be allowed from the  
edges of the hob.  
The minimum distance combustible  
material or a cooker hood can be fitted  
above the hob is 650 mm.  
For appliances installed in the Republic of Ireland please refer to NSAI- Domestic  
Gas Installation I.S 813 Current Edition Section 7- Permitted Locations of Appliance.  
17  
 
Installation  
IMPORTANT  
Any gas installation must be carried out by a GAS SAFE REGISTER  
installer.  
Please, ensure that, once the hob is installed, it is easily accessible for the  
engineer in the event of a breakdown.  
The manufacturer will not accept liability, should the above instructions or  
any of the other safety instructions incorporated in this instruction booklet  
be ignored.  
On the end of the shaft,  
which includes the G 1/2"  
threaded elbow, adjustment  
is fixed so that the washer  
is fitted between the  
components as shown in  
the diagram. Screw the  
parts together without using  
excessive force.  
A) End of shaft with nut  
B) Washer  
C) Elbow  
Gas Connection  
Connection to the gas supply should be with either rigid or semi-rigid pipe, i.e. steel  
or copper.  
The connection should be suitable for connecting to R 1/2 (1/2 BSP male thread).  
When the final connection has been made, it is essential that a thorough leak test is  
carried out on the hob and installation.  
Ensure that the main connection pipe does not exert any strain on the hob.  
It is important to install the elbow correctly, with the shoulder on the  
end of the thread, fitted to the hob connecting pipe.  
Failure to ensure the correct assembly will cause leakage of gas.  
Check to be sure that all connections to the unit are completely gas-tight;  
use a soap solution to do this, never a flame.  
18  
 
Building In  
Building over a cupboard or drawer  
If the hob is to be installed above a cupboard or drawer it will be necessary to fit a  
heat resistant board below the base of the hob on the underside of the work surface.  
It is also recommended to carry out the electrical connection to the hob as shown  
in diagrams 1 and 2.  
Building over a kitchen unit  
with door  
1
Proper arrangements must be taken in  
designing the furniture unit, in order to avoid  
any contact with the bottom of the hob which  
can be heated when it is operated. The  
recommended solution is shown in diagram 3.  
The panel fitted under the hob ("a") should  
be easily removable to allow easy access if  
technical assistance is needed. The space  
behind the kitchen unit ("b") can be used for  
connections.  
Dimensions are given in mm.  
2
3
19  
 
Fitting the Hob into the Worktop  
Carry out the building in of the hob as follows:  
• place the seals supplied with the  
hob on the front edge of the cut  
out. Then, place them at 86 mm  
from the side edges and at 10 mm  
from the rear edge, as shown in  
the diagram, taking care that the  
seals meet without overlapping.  
• place the hob in the cut out, taking  
care that it is centred;  
• fix the hob with the relevant fixing  
clamps, supplied with the  
accessories bag, as shown in the  
diagram. When the screws have  
been tightened, the excess seal  
can be removed.  
The edge of the hob forms a double seal  
which prevents the ingress of liquids.  
Seal  
20  
 
Electrical Connections  
Any electrical work required to install this hob should be  
carried out by a qualified electrician or competent person, in  
accordance with the current regulations.  
THIS HOB MUST BE EARTHED.  
Electrical Requirements  
Any permanent electrical installation must comply with the latest I.E.E.  
Regulations and local Electricity Board regulations. For your own safety  
this should be undertaken by a qualified electrician, e.g. your local Electricity  
Board, or a contractor who is on the roll of the National Inspection Council  
for Electrical Installation Contracting (NICEIC).  
The manufacturer declines any liability should these safety  
measures not be observed.  
This hob is designed to be connected to a 230 V~50 Hz AC electrical  
supply.  
Before switching on, make sure the electricity supply voltage is the same  
as that indicated on the hob rating plate.  
The rating plate is located on the bottom of  
the hob. A copy is attached on the back  
cover of this book.  
The hob is supplied with a 3 core flexible  
supply cord incorporating a 3 amp plug  
fitted. In the event of having to change the  
fuse, a 3 amp ASTA approved (BS 1362)  
fuse must be used.  
Should the plug need to be replaced for  
any reason, the wires in the mains lead are  
FO 0390  
coloured in accordance with the following  
code:  
Green and Yellow  
Blue  
Brown  
- Earth  
- Neutral  
- Live  
1) Connect the green and yellow (earth) wire to the terminal in the  
plug which is marked with the letter 'E' or the earth symbol  
or coloured green and yellow.  
)
2) Connect the blue (neutral) wire to the terminal in the plug which  
is marked with the letter 'N' or coloured black.  
21  
 
3) Connect the brown (live) wire to the terminal in the plug which  
is marked with the letter 'L' or coloured red.  
Upon completion there must be no cut, or stray strands of wire present  
and the cord clamp must be secure over the outer sheath.  
A cut off plug inserted into a 13 amp socket is a serious safety  
(shock) hazard. Ensure that the cut off plug is disposed of  
safely.  
The replacement of electric cable must be carried out ex-  
clusively by the service force centre or by personnel with  
similar competencies, in accordance with the current regu-  
lations.  
Permanent Connection  
In the case of a permanent connection, it is necessary that you install a  
double pole switch between the hob and the electricity supply (mains),  
with a minimum gap of 3 mm between the switch contacts and of a type  
suitable for the required load in compliance with the current electric  
regulations.  
The switch must not break the yellow and green earth cable at any point.  
Ensure that the hob supply cord does not come into contact  
with surfaces with temperatures higher than 50 deg. C.  
Wiring diagram  
22  
 
Fault Finding  
Preliminary Electrical Systems Check  
Blue  
Brown  
START  
Isolate appliance  
and carry out:  
A: Earth Continuity  
check.  
Blue  
Green  
Yellow  
Brown  
YES  
NO  
Carry out:  
C: Polarity check.  
Carry out:  
D: Resistance to  
Earth check.  
Has inlet fuse blown?  
NO  
Electricity supply  
should now be  
satisfactory.  
YES  
PLUG (with cover removed)  
Earth Wire  
SOCKET  
(face view)  
Inlet wiring  
faulty.  
Rectify any  
fault.  
Green/Yellow  
( )  
( )  
E
Neutral Wire  
Blue  
N
L
Isolate appliance and  
carry out:  
B: Insulation check.  
Rectify any fault  
including replacing  
fuses as necessary.  
23  
 
A. EARTH CONTINUITY CHECK  
Appliance must be electrically disconnected - meter set on W (Ohms)  
x 1 scale and adjust zero if necessary.  
Test leads from any appliance earth point to earth pin on plug.  
Resistance should be less than 0.1 W (Ohm), check all earth wires  
for continuity and all contacts clean and tight.  
B. INSULATION CHECK  
Appliance electrically disconnected, all switches ON.  
a) meter set on W (Ohms) x 1 scale.  
Test leads from L to N in appliance terminal block. If meter reads  
«0» then there is a short circuit.  
b) meter set on W (Ohm) x 100 scale.  
Repeat test with leads from L to E. If meter reads less than ×  
(infinity) there is a fault.  
NOTE - Should it be found that the fuse has failed but no fault is indicated  
- a detailed continuity check (i.e. by disconnecting and checking each  
component) is required to trace the faulty component.  
It is possible that a fault could occur as a result of local burning/arcing but  
no fault could be found under test. However a detailed visual inspection  
should reveal evidence of burning around the fault.  
24  
 
Ignition System / Gas Ignition  
YES  
Check gas supply at  
burner  
Ignitor does not spark  
NO  
Check plug top fuse and  
replace if necessary  
Light burner manually  
Check polarity and  
earth continuity of  
supply point  
Check by pass simmer  
adjusted  
Check fitting  
of burners  
Check position of the  
electrode  
Check earth continuity  
of appliance  
Check continuity from the tip of  
each electrode to the terminals  
1 to 4 on the ignitor unit  
Check continuity from 'N' on the  
mains connector block and "O" on  
the ignitor unit  
Check continuity from 'L' on the  
mains connector block and the  
taps ignition switches  
Check for breaks in the  
insulation of the HT leads  
Check continuity from ignition  
switches connector to ignitor unit  
Change the ignitor unit  
25  
 
Commissioning  
When the hob has been fully installed it will be necessary to check the  
minimum flame setting. To do this, follow the procedure below.  
1) Turn the gas tap to the MAX position and ignite.  
)
2) Set the gas tap to the MIN flame position then turn the control  
knob from MIN to MAX several times. If the flame is unstable or  
is extinguished follow the procedure below.  
Procedure:  
1) Re-ignite the burner and set  
)
to MIN.  
2) Remove the control knob.  
3) To adjust, use a thin bladed  
screwdriver and turn the  
adjustment screw (see  
diagram) until the flame is  
steady and does not  
Minimum adjustment  
extinguish, when the knob is  
screw  
turned from MIN to MAX.  
Repeat this procedure for all  
burners.  
Pressure Testing  
The pressure testing must be carried out on the burners.  
Proceed as follows:  
)
1) Remove the pan supports and the burner caps and crowns.  
2) Fit manometer tube over the injector.  
3) Turn on the burner gas supply and ignite another burner supply.  
The pressure reading should be nominally 20 mbar and must be  
between 17 mbar and 25 mbar.  
4) Turn off the burner supplies.  
26  
 
Conversion from Natural Gas to LPG  
IMPORTANT  
The replacement/conversion from natural gas to LPG should only be  
undertaken by a competent person.  
It is important to note that this model is designed for use with natural gas but can be  
converted for use with butane or propane gas providing the correct injectors are  
fitted. The gas rate is adjusted to suit.  
Method  
1) Ensure that the gas taps are in the 'OFF' position  
)
2) Isolate the hob from the electricity supply  
3) Remove all pan supports, burner caps, rings and crowns.  
4) With the aid of a 7mm box spanner the burner injectors can then be  
unscrewed and replaced by the appropriate LPG injectors.  
TO ADJUST THE GAS RATE  
With the aid of a thin bladed screwdriver completely tighten down the by  
pass adjustment screw. Upon completion stick the replacement rating plate  
on the under side of the hob.  
27  
 
39712-8001  
04/09 R.A  
 

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