LG | HB6422A | LG HB6422A Owner’s Manual

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Built-In Gas Cooktops
Installation and Operating Instructions
To avoid the risk of accidents or damage to the Gas Cooktops,
it is essential to read these operating instructions
before it is installed or used for the first time.
And please keep this manual for later reference.
P/No.: MFL62060303
Introduction ................................................................................. 3
1. Instructions for safe and proper use ....................................... 3
Instructions for the installer ...................................................... 5
2. Positioning of the hob ............................................................. 5
3. Electrical connection .............................................................. 9
4. Gas connection .................................................................... 10
5. Adaptation to different types of gas ...................................... 12
6. Final operations .................................................................... 15
Instructions for the user .......................................................... 17
7. Using the hob ....................................................................... 17
8. Cleaning and maintenance .................................................. 19
These instructions are valid only for end user countries whose
identification symbols appear on the cover of this manual.
authorised person who must carry out a suitable check of the gas
system, install the appliance, set it functioning and carry out an
inspection test.
INSTRUCTIONS FOR THE USER: these contain user advice,
description of the commands and the correct procedures for
cleaning and maintenance of the appliance.
1. Instructions for safe and proper use
This manual is an integral part of the appliance and therefore must
be kept in its entirety and in an accessible place for the whole
working life of the cooking hob. We advise reading this manual and
all the instructions therein before using the cooking hob. Also keep
the series of nozzles supplied. Installation
must be carried out by qualified personnel in accordance with the
regulations in force. This appliance is intended for domestic uses
and conforms to current regulations in force. The appliance has
been built to carry out the following functions: Cooking and
heating-up of food. All other uses are considered improper.
The manufacturer declines all responsibility for improper use.
Do not leave the packing in the home environment. Separate the
various waste materials and take them to the nearest special
garbage collection centre.
It is obligatory for the electrical system to be grounded according to
the methods required by safety rules.
The plug to be connected to the power cable and the socket must
be the same type and must conform to current regulations.
Never unplug by pulling on the cable.
Immediately after installation carry out a brief inspection test of
the cooking hob, following the instructions below. Should the
appliance not function, disconnect it from the supply and call the
nearest technical assistance centre.
Never attempt to repair the appliance.
Always check that the control knobs are in the position
“ZERO”(OFF) when you finish using the hob.
The identification plate, with technical data, serial number and
marking is clearly visible under the casing.
The plate on the casing must not be removed.
Before connecting the device, make sure that it has been regulated for
the type of gas that will feed it, checking the label under the casing.
Do not put pans without perfectly smooth and flat bottoms on the
cooking hob grids.
Do not use recipients or griddle plates that extend beyond the
external perimeter of the hob.
The hob is to be used by adults only. Do not let unsupervised
children play with the hob.
This appliance is designed for cooking food and it shall not be used
as a space heater.
Do not spray aerosols in the vicinity of this appliance while it is in
The manufacturer declines all responsibility for damage to
persons or things caused by non-observance of the above
prescriptions or by interference with any part of the appliance or
by the use of non-original spares.
Instructions for the installer
2. Positioning of hob
This appliance shall be installed only by authorized persons in
accordance with AS5601 - Gas Installations, any statutory
regulations, local gas regulations, municipal building codes,
electrical wiring regulations, and the manufacturer's installation
Clearance around the appliance must comply with the requirements
of AS5601.
The following operation requires building and/or carpentry work so
must be carried out by a competent tradesman. Installation can be
carried out on various materials such as masonry, metal, solid wood
or plastic laminated wood as long as they are heat resistant
(T 90°C). Never use silicone or other insulating products when
installing the appliance; use only the rubber gasket provided.
2.1 Attachment to support structure
Create an opening with the dimensions shown
in the figure in the top surface of the counter,
keeping a minimum distance of 50 mm from
the rear border. This appliance can therefore
be mounted against walls higher than the
work surface on condition that a certain
distance “X” be kept between the appliance and the wall as shown
in the figure so as to avoid damage from overheating. Make sure
there is a minimum of 750 mm between the hot plate flames and
any shelf that may be installed directly above them. Accurately
position the gasket provided all around the outer edge of the hole in
the top surface as shown in the figures below, pressing it down so
as to make it adhere properly. For measurements, refer to the figure
depending on the hob model to be installed, bearing in mind that in
both models the front and rear sides must skim the hole. Secure the
hob to the counter with brackets A (supplied). Carefully trim any
excess from border B of the gasket. The distances in the following
Instructions for the installer
drawing refer to the hole on the inner side of the gasket.
In case of installation on a hollow compartment with doors, a
separating panel has to be placed under the hob. Keep a minimum
distance of 10 mm between the bottom of the unit and the panel
surface. The panel has to be easily removable to allow access in
the event of technical service.
Overall dimensions: location of gas and electrical connection points
(all measures in mm).
* Dimension A, C : Clearances are
these for the hose assembly
2.2 Clearance above and around domestic appliances
Extract from AS5601
1 Overhead clearances – (Measurement A)
Range hoods and exhaust fans shall be installed in accordance with
the manufacturer’s instructions. However, in no case shall the
clearance between the highest part of the hob of the cooking
appliance and a range hood be less than 600 mm or, for an overhead
exhaust fan, 750 mm.
Any other downward facing combustible surface less than 600 mm
above the highest part of the hob shall be protected for the full width
and depth of the cooking surface area in accordance with Clause However, in no case shall this clearance to any surface be
less than 450 mm.
2 Side clearances – (Measurements B & C)
Instructions for the installer
Where B, measured from the periphery of the nearest burner to any
vertical combustible surface, is less than 200 mm, the surface shall be
protected in accordance with Clause to a height C of not less
than 150 mm above the hob for the full dimension (width or depth) of
the cooking surface area. Where the cooking appliance is fitted with a
‘splashback’, protection of the rear wall is not required.
3 Additional requirements for Freestanding and Elevated Cooking
Appliaces – (Measurements D & E)
Where D, the distance from the periphery of the nearest burner to a
horizontal combustible surface is less than 200 mm, then E shall be
10 mm or more, or the horizontal surface shall be above the trivet.
See insets above.
1 Requirement 3 does not apply to a freestanding or elevated
cooking appliance which is designed to prevent flames or the
cooking vessels from extending beyond the periphery of the
2 The ‘cooking surface area’ is defined as that part of the
appliance where cooking normally takes place and does not
include those parts of the appliance containing control knobs.
3 For definition of hob, see Clause 1.4.64.
4 For definition of trivet, see Clause 1.4.109.
5 Consideration is to be given to window treatments when
located near cooking appliances. See Clause 5.3.4.
3. Electrical connection
Make sure that the voltage and capacity of the power line conform
to the data shown on the plate located under the casing. Do not
remove this plate for any reason.
The plug on the end of the supply cable and the wall socket must
be the same type and conform to the current electrical system
regulations. Check that the power line is adequately grounded.
On the power line, install an omnipolar cut-off device with contact
cut-off distance greater than or equal to 3 mm, located in an easily
accessible position near the unit.
Do not use reducers, adapters or shunts.
If the power cable is replaced, the wire section on the new cable
must not be less than 1.5 mm2 (3 x 1.5 cable), keeping in mind
that the end to be connected to the hob must have the ground
wire (yellow-green) longer by at least 20 mm. Use only
H05V2V2-F cable or similar which has a maximum temperature
of 90°C. Any replacement needed should be carried out by a
specialised technician who should make the mains connections
according to the following diagram.
L = brown
N = blue
= yellow-green
The manufacturer will not be liable for any damage to
persons or property caused by non-observance of the above
instructions or deriving from the tampering of even a single part
of the hob.
Instructions for the installer
4. Gas connection
Use pipe-joint compound made for use with Natural U.L.P. gas.
The burner it controls is shown next to each knob (the
example corresponds to the front left burner).
This appliance is suitable for installation with Natural
Gas or ULPG (propane). Refer to page 12 for the
relevant burner pressure and appropriate injector sizes.
When the appliance is to be connected to Natural Gas
then the pressure regulator supplied must be fitted to the
gas inlet. A test point (for checking the gas pressure) is
supplied either with the regulator or as a separate fitting
in the case of ULPG (propane) appliances.
Connection of the appliance to the gas supply must be in
accordance with the requirements of AS5601. A 1/2” BSP connector
at the inlet is recommended and the gas supply line to the
appliance must be of adequate length to allow sufficient withdrawal
of appliance for service or disconnection and be:
1. annealed copper pipe or;
2. flexible hose according to AS/NZ1869 & be at least Class
“B”, 10 mm diameter.
The cooker must be installed with provision to allow the gas to be
turned off and disconnected for servicing and removal of the appliance
as required from the gas supply. Before the cooker is operated make
certain all relevant parts are placed in the correct position.
When the installation is completed the installation connections of
cooker will require to be leak tested, the burner operating pressure
and flame checked and adjusted.
Warranty service calls do not cover these adjustments!
To check the operating pressure of the appliance it is recommended
at least 2 large size burners are used. Ensure appliance is secured
to wall when installation is completed.
N.G. The regulator supplied must be fitted to the 1/2 BSP thread at
the rear of the appliance. An approved manual shut-off valve must
be installed. The N.G. regulator must be checked and adjusted to
1.0kPa after installation.
U.L.P.G. Can be connected to the inlet fitting directly.
The pressure must be checked to ensure it is operating
at 2.75kPa. A separate test point fitting must be installed
between the piping & the appliance for the pressure to
be checked to ensure it is operating at 2.75kPa.
4.1 Connection to ULPG
Use a pressure regulator and make the connection to the tank
according to the provisions of standards regulations in force. Make
sure that feed pressure conforms to the levels shown in the table in
paragraph “5.2 Regulation for ULPG”.
4.2 Ventilation of rooms
Caution – This hob may only be installed and operated in rooms
permanently ventilated in accordance with current regulations.
For proper operation of a gas appliance it is essential for the air
necessary for combustion of the gas to be able to flow naturally into
the room. Air must flow directly into the room through openings in
its outside walls. This (these) opening (s) must have a free passage
cross-section of at least 100 cm2, or 200 cm2 for appliances not
equipped with gas safety device. These openings must be
constructed so that they cannot be obstructed indoors or outdoors,
and should preferably be close to the floor on the side opposite to
the combustion gas discharge point. If it is not possible to make the
openings in the room where the cooker is installed, the necessary
air may be taken from an adjoining room, proveded it is not a
bedroom or a room with fire risk.
4.3 Discharge of combustion products
Discharge of combustion products must be guaranteed by means of
hoods connected to a natural draught flue with certain efficiency, or
by means of forced aspiration. An efficient aspiration system
requires careful planning by a specialist capable of installing it,
respecting the positions and distances prescribed by standards.
After installation, the installer must issue a certificate of conformity.
Instructions for the installer
5. Adaptation to different types of gas
Before performing any cleaning or maintenance work, detach
the appliance from the electrical socket.
The hob has been inspected for natural gas at a pressure of 1.0
kPa. For functioning with other types of gas the nozzles must be
replaced and the primary air adjusted.
To replace the nozzles and regulate the burners, you have to
remove the top as described in the following paragraph.
5.1 Removing the hob
1. Remove all the knobs, the grids, the burner caps and the flamecaps;
2. remove the screws and the nuts A that secure the burner
3. remove plates B;
4. lift the hob from its seat;
5. replace the burner nozzles in accordance with the reference gas
6. regulate the primary air as described in paragraph “5.2
Regulation for ULPG”.
5.2 Regulation for ULPG
Loosen screw A and push support B all the way. Use a double head
wrench to remove nozzle C and assemble the suitable one,
following the instructions indicated in the reference charts, with
respect to the type of gas to use. The screwing torque of the nozzle
should never exceed 3 Nm. Reposition support B so that nozzle C
is covered perfectly.
Move the Venturi tube D to regulate the air flow until distance “X” is
reached indicated in the chart in paragraph “5.4 Regulation of
primary air” and then secure the tube by means of screw A. After
the regulations have been carried out, restore the seals with sealing
wax or equivalent material.
Burner (*)
Auxiliary (1)
Semi rapid (2)
Rapid (3)
Wok (4)
ULPG – 2.75 kPa
Nominal gas
(*) For burner reference numbers, see page 16.
Instructions for the installer
5.3 Regulation for natural gas
The hob has been adjusted for natural gas at a pressure of
1.0kPa. To allow the unit to work with this type of gas, perform the
same operations described in paragraph “5.2 Regulation for ULPG”,
but choose the nozzles and regulate the primary air for natural gas,
as shown in the following table and in paragraph “5.4 Regulation of
primary air”. After the regulations have been carried out, restore the
seals with sealing wax or equivalent material.
Auxiliary (1)
Semi rapid (2)
Rapid (3)
Rapid (4)
Wok (5)
NG – 1.0 kPa
Nominal gas
5.4 Regulation of primary air
Referred to distance “X” in mm.
Auxiliary (1)
Semi-rapid (2)
Rapid (3)
Rapid (4)
Wok (5)
NG – 1.0 kPa
LPG – 2.75 kPa
To identify the burners on your hob, refer to the drawings in point
“6.3 Arrangement of burners on hob”
6. Final operations
Having carried out the above adjustments, reassemble the
appliance following, backwards, the instructions in paragraph “5.1
Removing the hob”.
6.1 Regulation of minimum for natural gas
Replace the components on the burner and slide
the knobs on the gas tap pins.
Light the burner and set it at minimum position.
Remove the knob and turn the regulation screw
inside or next to the gas tap pin (depending on the
model) until you get a suitable minimum flame.
Replace the knob and check burner flame stability:
(rapidly turning the knob from maximum to minimum position, the
flame should not go out).
6.2 Regulation of minimum for ULPG
To regulate the minimum for ULPG, completely tighten (clockwise)
the screw inside or next to the gas tap pin (depending on the
model). The diameters of the by-passes for each burner are given
in table “5.2 Regulation for ULPG”.
After having regulated the device with gas other than the one
tested, replace the label located on the guard with the one that
corresponds to the new gas. The label is inside the bag that
contains the nozzles provided.
Instructions for the installer
6.3 Arrangement of burners on hob
1. Auxiliary
2. Semi-rapid
3. Rapid
4. Rapid
5. Wok
6.4 Lubrication of gas taps
After a while, the gas tap may become hard to turn or lock. If this
happens, it has to be cleaned inside and re-greased.
This must be done by a qualified technician.
Instructions for the user
7. Using the hob
Before turning on the burners, make sure that the burner rings,
caps and grids have been fitted correctly.
In the Wok burner, notch A must be aligned with pin B.
Grid C provided is intended for use with woks (Chinese pans).
Adapter D comes only with open grids models and is intended
for use with small sized vessels.
Some models do not feature all accessories.
7.1 Ignition of the burners
For each knob the corresponding burner is indicated. The device is
fit with electronic ignition. Simply press and simultaneously turn the
knob counter-clockwise on the low point flame symbol, until the
burner is ignited. Concerning models with valves, push the knob for
approximately 2 seconds in order to keep the flame burning and to
activate the safety device. The burner might go off when the knob is
released. In this case repeat the aforesaid operation keeping the
knob pressed for more than 2 seconds.
Should the burners go off accidentally in the models with valves,
a safety device will trip after approximately 20 seconds to block
the gas outlet even if the tap is open.
Instructions for the user
7.2 Practical advice for using the burners
For better burner performance and minimum gas consumption, flat
bottomed, even recipients must be used, with covers and proportional
in size to the burners (see paragraph “7.3 Diameter of containers”).
To avoid overcooking or damage to the surface top while cooking, all
recipients or griddles must be positioned within the cooking hob
perimeter and must be a minimum distance of 3-4 cm from the knobs.
7.3 Diameter of containers
Ø min. and max. (in cm)
Rapid (3)
Rapid (4)
(*) For burner reference numbers, see page 16.
7.4 Using a griddle plate
A few precautions are necessary if you wish to use a griddle plate:
• leave a gap of at least 160 mm between the edge of the griddle plate and the
side wall;
• if one of the burners close to the wooden rear wall is of triple flame type,
leave a gap of at least 160 mm between this wall and the edge of the griddle
• do not allow the burner flames to extend beyond the edge of the griddle plate;
• operate the burners underneath the griddle plate for 10 minutes at maximum
power, then turn them down to the minimum setting. Never use the griddle
plate for more than 45 minutes.
8. Cleaning and maintenance
Never use a steam jet to clean the appliance.
Before any intervention, disconnect the power supply of the
8.1 Cleaning
Clean the cooking top regularly every time you use it, obviously
after it has cooled.
8.1.1 Regular daily cleaning of the hob
In order to clean and preserve the surface, always use specific
products only, which do not contain abrasive substances or
chlorine-based acid substances.
How to use: pour the product on a damp cloth and wipe the
surface, rinse thoroughly and dry with a soft cloth or deerskin.
8.1.2 Food stains or residues
Do not use metallic sponges or sharp scrapers: they will
damage the surface.
Use normal non-abrasive products and remove spots or
residuals with non-scratch sponges or, if need be, with wood or
plastic utensils.
Rinse thoroughly and dry with a soft cloth or deerskin.
Instructions for the user
8.2 Cleaning of cooking hob components
CAUTION: do not wash these components in a dishwasher. In
normal use of the hob, the stainless steel burner caps and panstands tend to be burnished by the high temperature. Clean
these parts using very fine abrasive sponges or similar
commercial products. Then use a specific paste polish to
restore the steel’s shine. Your local authorised after-sales
technician is able to supply professional products for appliance
cleaning and care.
Grids, caps, flame cap crowns and burners can be
removed for ease of cleaning. Wash them in warm
water using a non-abrasive detergent, taking care to
remove all tough spots. Before remounting, allow the
components to fully dry out.
8.2.1 Ignition plugs and safety devices
For good functioning of the lighting ignition plugs and the
safety devices, keep them very clean.
Check frequently and clean with a damp cloth when
8.2.2 The cover
Clean the glass or steel cover, where mounted, with warm water.
Never use abrasive sponges or detergents. To clean the rear part of
the cooktop, remove the cover by lifting out.
When finished cleaning, refit the cover making sure to insert it
Before lifting up the cover, dry out properly.
Never lower the cover when burners or electric elements are
on or still hot.
LG Service on 1300 LG CARE (1300 54 2273) AUSTRALIA or
0800 LG CARE (0800 54 2273) NEW ZEALAND
LG Electronics Australia
2 Wonderland Drive
Eastern Creek NSW 2766
(ABN : 98 064 531 264)
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