Zanussi Cooktop ZGF 982 User Manual

GAS HOB  
MODE L ZGF 982  
INSTRUCTION BOOKLE T  
Please read this instruction booklet before using the appliance  
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Con t en t s  
For the Installer  
For the User  
Tech n ical Dat a  
Page 1 0  
Descript ion  
of t h e Hob  
Page 5  
Page 6  
Im port an t Safet y  
Requ irem en t s  
Operat ion  
Page 1 1  
Page 1 2  
Page 1 2  
Page 1 3  
Main t en an ce  
an d Clean in g  
In st allat ion  
Page 7  
Page 8  
Page 8  
Page 9  
Gas Con n ect ion  
Bu ildin g In  
Som et h in g  
Not Work in g  
Elect rical Con n ect ion Page 1 4  
Service an d  
Spare Part s  
Wirin g Diagram  
Fau lt Fin din g  
Com m ission in g  
Page 1 5  
Page 1 6  
Page 1 8  
Peace of Min d  
for 2 4 Mon t h s  
Con version from  
n at u ral gas t o LPG  
Page 1 8  
This appliance complies with the following  
E.E.C. Directives:  
* 73/23 - 90/683  
Guide to Use the instructions  
(Low VoltageDirective);  
The following symbols will be found in the text to  
guide you throughout the Instructions:  
* 93/68 (General Directives);  
* 89/336 (Electromagnetical  
Compatibility Directive);  
* 90/396 (Gas Appliances),  
and subsequent modifications  
Safety Instructions  
Step by step instructions for an  
operation  
Hints and Tips  
i
4
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Descript ion of t h e Hob  
2
3
4
3
5
1
6
7
8
9
10  
11  
1. Hob Top  
2. Auxiliary Burner  
3. Semi-rapid Burners  
4. Ultra-rapid Double-crown Burner  
5. Rapid Burner  
6. Ignition pushbutton  
7. Control knob for front left burner (auxiliary)  
8. Control knob for back left burner (semi-rapid)  
9. Control knob for central burner (ultra-rapid)  
10. Control knob for back right burner (semi-rapid)  
11. Control knob for front right burner (rapid)  
INSTALLATION  
WHEN THE HOB IS FIRST INSTALLED  
Any gas installation must be carried out by  
a registered CORGI installer, and in  
accordance with existing rules and  
regulations.  
Once the hob has been installed, it is  
important to remove any protective  
materials, which were put on in the factory.  
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.  
5
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Operat ion  
HOB BURNERS  
To light a burner, push the relevant control knob in,  
turn it anticlockwise to maximum position, and  
depress the ignition pushbutton marked by a small  
electric spark symbol. Then adjust the flame as  
required.  
If the burner does not ignite, turn the control knob to  
zero, and try again.  
To ensure maximum burner efficiency, you should  
only use pots and pans with a flat bottom fitting the  
size of the burner used (see table).  
Burner  
minimum maximum  
diameter  
diameter  
Ultra-rapid  
(Double-crown)  
Large (rapid)  
Medium (semi-rapid)  
Small (Auxiliary)  
180 mm.  
160 mm.  
120 mm.  
80 mm.  
260 mm.  
240 mm.  
220 mm.  
160 mm.  
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.  
As soon as a liquid starts boiling, turn down  
the flame so that it will barely keep the  
liquid simmering.  
i
Using the W ok Stand  
A wok stand is provided to enable you to use a round  
bottomed wok on the hob. The wok stand must only  
be used on the central burner, and should not be used  
with any other type of wok or pan.  
When fitting the wok stand, ensure the recesses in the  
frame fit securely onto the bars of the pan supports,  
as shown in the diagram.  
Take care when frying food in hot oil or fat,  
as the overheated splashes could easily  
ignite.  
If the control knobs become difficult to  
turn, please contact your local Zanussi  
Service Force Centre.  
6
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Main t en an ce an d Clean in g  
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.  
The Hob Top  
Regularly wipe over the hob top using a soft cloth  
well wrung out in warm water to which a little  
washing up liquid has been added. Avoid the use of  
the following:  
FO 2347  
- 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, it is  
recommended that a cleaning product such as Hob  
Brite or Bar Keepers Friend is used.  
Pan Supports and W ok Stand  
To keep the pan supports in the correct position, they  
are hooked into hinges at the back of the hob.  
The pan supports can be lifted for easier cleaning, as  
shown in fig. 1.  
Fig. 1  
To remove the pan supports completely, proceed as  
shown in fig. 2.  
The pan supports and the Wok Stand are dishwasher  
proof. If washing them by hand, take care when  
drying them as the enamelling process occasionally  
leaves rough edges. If necessay, remove stubborn  
stains using a paste cleaner.  
FO 2032  
The Burners  
The burner caps and crowns can be removed for  
cleaning.  
Fig. 2  
Wash the burners taps 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.  
7
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Som et h in g Not Work in g?  
If the hob is not working correctly, please carry out the following checks before contacting your local Zanussi  
Service Force Centre.  
IMPORTANT: If you call out an engineer to a fault listed below, or to repair a fault caused by incorrect use or  
installation, a charge will be made even if the appliance is under guarantee.  
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 Zanussi 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.  
When you contact them, they will need the following  
information:  
1. Your name, address and post code.  
2. Your telephone number  
3. The model and the serial number (which can be  
found on the rating plate)  
4. Clear and concise details of the fault, for example  
when does the fault occur and how often.  
5. Date of purchase  
Service an d Spare Part s  
CUSTOMER CARE  
For general enquiries concerning your Zanussi  
appliance, contact our Customer Care Department by  
letter or telephone as follows:  
If you require spare parts or an engineer contact your  
local Service Force Centre by telephoning:  
Customer Care Department  
ZANUSSI  
55-77 High Street  
Slough  
0870 5 929929  
Your call will be routed to your local Service Force  
Centre. For further details, please see the  
accompanying Customer Care Booklet.  
Berkshire  
SL1 1DZ  
Tel: 08705 - 727727  
8
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Peace of Min d for 2 4 Mon t h s  
ZANUSSI GUARANTEE CONDITIONS  
Eu ropean Gu aran t ee  
If you should move to another country within Europe  
then your guarantee moves with you to your new  
home subject to the following qualifications:  
We, Zanussi, undertake that if, within 24 months of  
the date of the purchase, this Zanussi appliance or  
any part thereof is proved to be defective by any  
reason only of faulty workmanship or materials, we  
will, at our option, repair or replace the same FREE  
OF ANY CHARGE for labour, materials or carriage  
on condition that:  
* The guarantee starts from the date you first  
purchased your product.  
* The guarantee is for the same period and to the  
same extent for labour and parts as exist in the  
new country of use for this brand or range of  
products.  
* The appliance has been correctly installed and  
used only on the gas and electricity supply stated  
on the rating plate.  
* This guarantee relates to you and cannot be  
transferred to another user.  
* The appliance has been used for normal domestic  
purpose only, and in accordance with the  
manufacturer's instructions.  
* Your new home is within the European  
Community (EC) or European Free Trade Area.  
* The product is installed and used in accordance  
with our instructions and is only used  
* The appliance has not been serviced, maintained,  
repaired, taken apart or tampered with by any  
person not authorised by us.  
domestically, i.e. a normal household  
* The product is installed taking into account  
regulations in your new country.  
* All service work under this guarantee must be  
undertaken by a Zanussi Service Centre.  
* Any appliance or defective part replaced shall  
become the Company's property.  
Before you move, please contact your nearest  
Customer Care centre, listed below, to give them  
details of your new home. They will then ensure that  
the local Service Organisation is aware of your move  
and able to look after you and your appliances.  
* This guarantee is in addition to your statutory and  
other legal rights.  
Home visits are made between 8.30am and 5.30pm  
Monday to Friday. Visits may be available outside  
these hours, in which case a premium will be  
charged.  
France  
Senlis  
+33 (0)3 44 62 29 99  
Germany Nürnberg +49 (0)911 323 2600  
Italy  
Pordenone +39 (0)1678 47053  
Stockholm +46 (0)8 738 79 50  
Exclu sion s  
Sweden  
UK  
This guarantee does not cover:  
Slough  
+44 (0)1753 219897  
* Damage or calls resulting from transportation,  
improper use or neglect, the replacement of any  
light bulbs or removable parts of glass or plastic.  
* Costs incurred for calls to put right an appliance  
which is improperly installed or calls to appliance  
outside the European Community (EC) or  
European Free Trade Area.  
* Appliances found to be in use within a  
commercial or similar environment, plus those  
which are the subject to rental agreements.  
* Products of Zanussi manufacture which are not  
marketed by Zanussi.  
9
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In st ru ct ion s for t h e In st aller  
Engineer technical data  
OVERALL DIMENSIONS  
SUPPLY CONNECTIONS  
Gas:  
Width:  
Depth:  
Height:  
Weight:  
860 mm.  
510 mm.  
72 mm.  
12 Kg.  
RC 1/2 inch (1/2 inch male) Rear right hand corner  
Electric:  
230-240V 50Hz supply, 3 core flexible cable with  
non rewireable plug fitted with a 3 amp cartridge  
fuse.  
CUT OUT DIMENSIONS  
Width:  
Depth:  
830 mm.  
480 mm.  
Thickness: 30 mm.  
Ign it ion HT Spark  
Spark Generator Ispra Control's BF 50066 - 240V 0.6 YA T 120  
Spark Gap Fixed  
Rear Left Burner (semi rapid)  
Rear Right Burner (semi rapid)  
Heat Input 2.0 kW (6824 BTU/HR)  
Heat Input 2.0 kW (6824 BTU/HR)  
Front Left Burner (auxiliary)  
Front Right Burner (rapid)  
Heat Input 1.0 kW (3412 BTU/HR)  
Heat Input 3.0 kW (10236 BTU/HR)  
Central Burner (Ultra-rapid Double-crown)  
Heat Input 3.5 kW (11942 BTU/HR)  
BURNER  
RAPID  
(large)  
SEMI-RAPID  
(medium)  
AUXILIARY  
(small)  
ULTRA-RAPID  
(double-crown)  
POSITION  
MAX  
MIN  
MAX  
MIN  
MAX  
MIN  
MAX  
MIN  
NOMINAL THERMAL  
POWER  
kW  
3.0  
0.65  
2.0  
0.45  
1.0  
0.33  
3.5  
1.2  
NOMINAL FLOW  
RATE  
m3/h  
0.286  
119  
0.062  
0.190  
96  
0.043  
0.095  
70  
0.031  
0.333  
136  
0.114  
NOZZLE REFERENCE  
1/100 mm  
Adjust.  
Adjust.  
Adjust.  
Adjust.  
NOMINAL THERMAL  
POWER  
kW  
2.8  
0.65  
2.0  
0.45  
1.0  
0.33  
3.5  
1.2  
NOMINAL FLOW  
RATE  
g/h  
202  
86  
47  
40  
144  
71  
32  
32  
72  
50  
24  
28  
252  
93  
86  
56  
NOZZLE REFERENCE  
1/100 mm  
APPLIANCE CLASS : 3  
Burner  
Dia. Tap By-pass  
1/100 mm  
Tap colour  
APPLIANCE  
CATEGORY: II2H3+  
Auxiliary  
Semi-rapid  
Rapid  
28  
32  
40  
56  
Green  
Green/Blue  
Green/Black  
Black/Red  
APPLIANCE  
GAS SUPPLY: Natural gas G20 / 20mbar  
Ultra-rapid  
Aeration adjustment none  
10  
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Im port an t safet y requ irem en t s  
This hob must be installed in accordance with the Gas  
Safety (Installation and Use) Regulations (Current  
Edition) and the IEE Wiring Regulations (Current  
Location  
Edition).  
The hob may be located in a kitchen, a kitchen/diner  
or bed sitting room, but not in a bathroom or shower  
room.  
Detailed recommendations are contained in the  
following British Standards Codes Of Practice: B.S.  
6172/ B.S. 5440, Part 2 and B.S. 6891 Current  
Editions.  
Before making the cut out in the worktop ensure that  
the edges of the hob that are to be near either a side or  
rear wall have a minimum distance of 55 mm.  
between the edge of the hob and the wall.  
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 can be  
fitted directly above the hob is 700 mm.  
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 110 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 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.  
A minimum distance of 100 mm. must be left  
between the side edges of the hob and any adjacent  
cabinets or walls.  
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.  
INSTALLATION GUIDANCE INSTRUCTIONS  
INSTALLATION GUIDANCE INSTRUCTIONS  
CLEARANCES REQUIRED WHEN FITTING  
ZANUSSI GAS HOB  
CLEARANCES REQUIRED WHEN FITTING  
ZANUSSI GAS HOB  
WITHOUT A COOKER HOOD ABOVE  
WITH A COOKER HOOD ABOVE  
700 mm  
650 mm  
400 mm  
400 mm  
50 mm  
400 mm  
50 mm  
400 mm  
100 mm  
100 mm  
50 mm  
50 mm  
FO 2027*  
FO 2028*  
11  
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In st allat ion  
IMPORTANT  
This hob must be installed by qualified  
personnel to the relevant British Standards.  
Any gas installation must be carried out by  
a registered CORGI installer.  
The manufacturer will not accept liability,  
should the above instructions or any of the  
other safety instructions incorporated in this  
book be ignored.  
On the end of the shaft, which includes the GJ 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.  
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  
RC 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.  
FO 0264  
A) End of shaft with nut  
B) Washer  
C) Elbow  
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.  
Rect an gu lar cu t -ou t size for h ob  
Cut O ut Size  
The dimensions of the cut-out are given in the  
diagram.  
55 min.  
480  
830  
150 min  
Dimensions are given in mm.  
FO 2349  
12  
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Bu ildin g 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.  
ON/OFF SWITCH  
ON/OFF SWITCH  
2
1
3
a
60  
FLEX  
OUTLET  
b
FLEX  
OUTLET  
FO 0764  
FO 0763  
FO 1013  
Dimensions are given in mm.  
Building over a kitchen unit with door  
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.  
Fitting the Hob into the worktop  
FO 2348  
Carry out the building in of the hob as follows:  
• put the seals supplied with the hob, on the  
edges of the cut out, 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  
and screws, as shown in the diagram. When  
the screws have been tightened, the excess  
seal can be removed.  
Seal  
a
The edge of the hob forms a double seal which  
prevents the ingress of liquids.  
FO 0199  
13  
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Elect rical con n ect ion s  
Any electrical work required to install this  
hob should be carried out by a qualified  
electrician or competent person, in  
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.  
accordance with the current regulations.  
THIS HOB MUST BE EARTHED.  
Th e m an u fact u rer declin es an y liabilit y  
sh ou ld t h ese safet y m easu res n ot be  
observed.  
The switch must not break the yellow and green earth  
cable at any point.  
Th is h ob is design ed t o be con n ect ed t o a  
2 3 0 -2 4 0 V 5 0 Hz AC elect rical su pply.  
Ensure that the hob supply cord does not  
come into contact with surfaces with  
temperatures higher than 50 deg. C.  
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 3amp plug fitted. In the event of  
having to change the fuse, a 3amp 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 coloured in  
accordance with the following code:  
Green and Yellow - Earth  
Blue  
Brown  
- Neutral  
- Live  
— Connect the green and yellow (earth) wire to  
the terminal in the plug which is marked with  
the letter 'E' or the earth symbol  
coloured green and yellow.  
or  
— Connect the blue (neutral) wire to the terminal  
in the plug which is marked with the letter 'N'  
or coloured black.  
— Connect the brown (live) wire to the terminal  
in the plug which is marked with the letter 'L'  
or coloured red.  
NOTE:  
The earth wire should be about 2 cm. longer  
than the live and neutral wires.  
Upon completion there must be no cut, or stray  
strands of wire present and the cord clamp must be  
secure over the outer sheath.  
FO 0390  
A cut off plug inserted into a 13 amp socket  
is a seriuos safety (shock) hazard. Ensure  
that the cut off plug is disposed of safely.  
14  
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Wirin g Diagram  
L
1
2
3
4
5
6
A
0
220/240  
B
N
A. IGNITOR SWITCH  
B. IGNITOR UNIT  
15  
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Fau lt Fin din g  
Prelim inar y Electrical System s Check  
PLUG (with cover removed)  
SOCKET  
(face view)  
Earth Wire  
Green/Yellow  
( )  
( )  
E
Blue  
Brown  
Green  
Yellow  
START  
Isolate appliance  
and carry out:  
Neutral Wire  
Blue  
A: Earth Continuity  
check.  
N
L
Blue  
Green  
Brown  
Yellow  
Carry out:  
D: Resistance to  
Earth check.  
Electricity supply  
should now be  
satisfactory.  
NO  
YES  
Carry out:  
C: Polarity check.  
A. EARTH CONTINUITY CHECK -  
Appliance must be electrically  
Has inlet fuse blown?  
disconnected - meter set on (Ohms) x 1  
scale and adjust zero if necessary.  
NO  
YES  
a) Test leads from any appliance earth point  
to earth pin on plug. Resistance should  
be less than 0.1 (Ohm), check all earth  
wires for continuity and all contacts clean  
and tight.  
Inlet wiring  
faulty.  
Rectify any  
fault.  
B. INSULATION CHECK - Appliance  
electrically disconnected, all switches ON.  
a) meter set on (Ohms) x 1 scale.  
Test leads from L to N in appliance  
terminal block. If meter reads «0» then  
there is a short circuit.  
Isolate appliance and  
carry out:  
B: Insulation check.  
Rectify any fault  
including replacing  
fuses as necessary.  
b) meter set on (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.  
16  
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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 by pass simmer  
adjusted  
Check polarity and earth  
continuity of supply point  
Check position of the  
electrode  
Check earth continuity  
of appliance  
Check fitting of burners  
Check continuity from 'N' on the  
mains connector block and "O" on  
the ignitor unit  
Check continuity from the tip of  
each electrode to the terminals 1  
to 5 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 ignition  
switch  
Change the ignitor unit  
17  
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Com m ission in g  
When the hob has been fully installed it will be  
necessary to check the minimum flame setting. To do  
this, follow the procedure below.  
- Turn the gas tap to the MAX position and ignite.  
- 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:  
Re-ignite the burner and set to MIN.  
Remove the control knob, insert a thin  
bladed screwdriver down the centre of the  
gas tap control shaft and turn the adjustment  
screw until the flame is steady and does not  
extinguish, when the knob is turned from  
MIN to MAX. Repeat this procedure for all  
burners.  
Pressu re Test in g  
Remove left hand pan support and front left  
burner cap and crown.  
Fit manometer tube over the injector.  
Turn on the burner gas supply and ignite  
another burner.  
The pressure reading should be nominally  
20mbar and must be between 17 mbar and  
25mbar.  
Turn off the burner supplies.  
Con version from Nat u ral Gas t o LPG  
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.  
TO ADJ UST THE GAS RATE  
With the aid of a thin bladed screwdriver completely  
tighten down the by pass adjustment screw, which is  
located down the centre of the gas tap control shaft.  
Upon completion stick the replacement rating plate  
on the under side of the hob.  
Met h od  
• Ensure that the gas taps are in the 'OFF' position  
• Isolate the hob from the electrical supply  
• Remove all pan supports, burner caps, rings, crowns  
and control knobs.  
• With the aid of a 7mm box spanner the burner  
injectors can then be unscrewed and replaced by the  
appropriate LPG injectors.  
IMPORTANT  
The replacement/conversion of the gas hob should  
only be undertaken by a competent person.  
18  
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