Installation and Maintenance 1
Peculiar Smells 1
If You Smell Gas 1
Ventilation 1
Personal Safety 1
Cleaning 2
2. Hob Overview 3
Wok Ring Burner 4
Hob Care 4
3. Cleaning Your Hob 5
Essential Information 5
Hotplate Burners 5
Cleaning Table 6
4. Troubleshooting 7
5. Installation 8
Dear Installer 8
Provision of Ventilation 9
Conversion 9
Positioning the Hob 10
6. Conversion to LPG 13
Injectors 13
Tap Adjustment 14
Ax Label 14
Pressure Testing 14
Lubrication of the Gas Taps 14
Conversion to LP 15
Gas Connection 15
Connection to the Gas Supply 16
Pressure Testing 17
Electrical Connections 18
Hotplate checks 18
Customer Care 18
7. Circuit Diagram 19
8. Technical Data 20
9. Warranty/After Sales Service 22
1. Before You Start...
• DocNo.011-0001 - Introduction gas
Thank you for buying a Rangemaster hob. It should give you
many years trouble-free cooking if installed and operated
correctly. It is important that you read this section before you
start, particularly if you have not used a gas hob before.
CAUTION: This appliance is for cooking purposes
only. It must not be used for other purposes, for
example room heating. Using it for any other
purpose could invalidate any warranty or liability
claim. Besides invalidating claims this wastes fuel.
Installation and Maintenance
In the UK, the hob must be installed by a CORGI registered
gas engineer. The electrical installation should be in
accordance with BS 7671. Otherwise, all installations
must be in accordance with the relevant instructions
in this booklet, with the relevant national and local
regulations, and with the local gas and electricity supply
company requirements.
Make sure that the gas supply is turned on and that the hob is
wired in and switched on (the hob needs an electricity supply
for ignition).
It is recommended that this appliance is serviced annually.
Only a qualied service engineer should service the hob and
only approved spare parts should be used.
Always allow the hob to cool and then switch it o at the
mains before cleaning or carrying out any maintenance work,
unless specied otherwise in this guide.
Peculiar Smells
Make sure the room is well ventilated to the outside air (see
‘Ventilation’ below). People with respiratory problems should
vacate the area for this brief period.
If You Smell Gas
• DO NOT turn electric switches on or off
Ventilation
CAUTION: Using a gas cooking appliance will result in the
production of heat and moisture in the room in which it
is installed. Make that the kitchen is well ventilated; keep
natural ventilation holes open or install a powered cooker
hood that vents outside. If you have several burners on or
use the hob for a long time, open a window or turn on an
extractor fan.
Personal Safety
Accessible parts will become hot during use and will
retain heat even after you have stopped cooking.
Keep babies and children away from the hob and
never wear loose-tting or hanging clothes while
the appliance is in use.
When the hob is not in use make sure that the
control knobs are in the OFF position.
DO NOT use hotplate protectors, foil or hotplate
covers of any description. These may aect the safe
use of your hotplate burners and are potentially
hazardous to health.
Always keep combustible materials, e.g. curtains,
and ammable liquids a safe distance away from
your hob.
Do not spray aerosols in the vicinity of the hob while
it is on.
Use dry oven gloves when applicable – using damp
gloves might result in steam burns when you touch
a hot surface. Do not use a towel or other bulky cloth
in place of a glove – it might catch re if brought into
contact with a hot surface.
Never operate the hob with wet hands.
Never heat unopened food containers. Pressure
build up may make the containers burst and cause
injury.
• DO NOT smoke
• DO NOT use naked flames
• Do turn off the gas at the meter or cylinder
• Do open doors and windows to get rid of the gas
• Do keep people away from the area affected
• Call your gas supplier
If you are using natural gas in the UK ring the National Grid
on: 0800 111 999.
Do not use unstable saucepans. Always ensure that
you position the handles away from the edge of the
hotplate.
Take care NOT to place metallic objects such as
knives, forks, spoons and lids on the hob surface
since they can get hot.
The appliance is not intended to be operated by
means of external timer or separated remote-control
system.
Never leave the hotplate unattended at high heat settings.
Pans boiling over can cause smoking, and greasy spills may
catch on re. Use a deep fat thermometer whenever possible
to prevent fat overheating beyond the smoking point.
1
Never leave a chip pan unattended. Always heat fat
slowly, and watch as it heats. Deep fry pans should
be only one third full of fat. Filling the pan too full
of fat can cause spill over when food is added. If you
use a combination of oils or fats in frying, stir them
together before heating, or as the fats melt.
Foods for frying should be as dry as possible. Frost on frozen
foods or moisture on fresh foods can cause hot fat to bubble
up and over the sides of the pan. Carefully watch for spills or
overheating of foods when frying at high or medium high
temperatures. Never try to move a pan of hot fat, especially a
deep fat fryer. Wait until the fat is cool.
Do not use water on grease res and never pick up a
aming pan. Turn o the controls and then smother
a aming pan on a surface unit by covering the pan
completely with a well tting lid or baking tray. If
available, use a multi-purpose dry chemical or foamtype re extinguisher.
Take care that no water seeps into the appliance.
Only certain types of glass, glass-ceramic, earthenware or
other glazed containers are suitable for hotplate cooking;
others may break because of the sudden change in
temperature.
Cleaning
In the interests of hygiene and safety, the hob should be kept
clean at all times as a build up of fats and other foodstus
could result in a re.
Clean only the parts listed in this guide.
Clean with caution. If a wet sponge or cloth is used to wipe
spills on a hot surface, be careful to avoid steam burns. Some
cleaners can produce noxious fumes if applied to a hot
surface.
2
ArtNo.316-0025 RGG77 hob control to high
ArtNo.316-0026 RGG77 hob control to low
Semi-rapid
Diameter: 16 - 18 cm
Gas burner: 1.75 kW
Semi-rapid
Diameter: 16 - 18 cm
Gas burner: 1.75 kW
Auxilliary
Diameter: 10 - 14 cm
Gas burner 1.0 kW
Rapid
Diameter: 20 - 22 cm
Gas burner 3.0 kW
Wok Ring
Diameter: 22 - 24 cm
Gas burner 3.8 kW
2. Hob Overview
Fig. 2.1
TypeMaterialPower supply
RMB70HPNGFGL/Glass230 V ~ 50Hz
The diagram by each of the control knobs indicates which
burner that knob operates (Fig. 2.1). Each burner has a
special Flame Safety Device (FSD) that stops the ow of gas if
the ame goes out.
To light a burner, push in and turn the associated control
knob anti-clockwise (Fig. 2.2) to the ‘high’ position indicated
by the large ame symbol [
]. Keep the knob pressed down
for 3-5 seconds to let the gas through to the burner. The
igniter should spark and light the gas.
If, when you let go of the control knob the burner goes out,
then the safety device has not held in. Turn the control to the
o position and wait one minute then try again, this time
holding in the control knob for slightly longer.
Adjust the ame to suit by turning the control knob clockwise
(Fig. 2.3).
Ensure that the ames are under the pans. Using a lid will
help the contents boil more quickly (Fig. 2.4).
Large pans should be spaced well apart.
Fig. 2.2
Fig. 2.3
Fig. 2.4
ArtNo.311-0001 Right pans gas
3
Fig. 2.5
Fig. 2.6
Fig. 2.7
ArtNo.311-0002 Pan with rim
Art No. 311-0003 Simmer aids
Pans and kettles with concave bases or down turned base
rims should not be used (Fig. 2.5).
Simmering aids, such as asbestos or mesh mats, are NOT
recommended. They will reduce burner performance and
could damage the pan supports (Fig. 2.6).
You should also avoid using unstable and misshapen pans
that may tilt easily, and pans with a very small base diameter,
e.g. milk pans, single egg poachers (Fig. 2.7).
The minimum recommended pan diameter is 120mm. The
maximum allowable pan base diameter is 250mm.
Wok Ring Burner
The wok ring burner is designed to provide even heat over a
large area. It is ideal for large pans and stir frying. For heating
smaller pans, the smaller hotplate burners may be more
ecient.
Woks vary very widely in size and shape. It is important that
the wok sits down on the pan support – however, if the wok is
too small, the cradle will not support it properly (Fig. 2.8).
The cradle should be used on the wok burner only. When you
t the cradle, make sure that it is supported properly on a pan
support and the wok is sitting level in the cradle (Fig. 2.9)..
The cradle will get very hot in use
Fig. 2.8
Fig. 2.9
ArtNo.311-0004 Tipping wok
Hob Care
The burner parts can be removed for cleaning; see ‘Cleaning
your hob’.
You should wipe the top surface of the hob around the
hotplate burners as soon as possible after spills occur. Try to
wipe any spills o while the hob is still warm.
NOTE: The use of aluminium pans may cause metallic
marking of the pan supports. This does not aect the
durability of the enamel and may be cleaned o with an
appropriate metal cleaner.
ArtNo.311-0006 Correct wok sizes
4
ArtNo.316-0009 RG70 triple ring burner
A
C
D
B
F
E
3. Cleaning Your Hob
Essential Information
Allow the cooker to cool and then isolate the electricity
supply before carrying out any thorough cleaning.
Never use paint solvents, washing soda, caustic
cleaners, biological powders, bleach, chlorine based
bleach cleaners, coarse abrasives or salt.
Do not mix dierent cleaning products – they may
react together with hazardous results.
All parts of the hob can be cleaned with hot soapy water –
but take care that no surplus water seeps into the appliance.
Remember to switch on the electricity supply before re-using
the cooker.
Regular cleaning is recommended. For easier cleaning, wipe
away any spillages immediately.
Hotplate Burners
The burner heads and caps can be removed for cleaning.
DO NOT put the burner heads in a dishwasher.
Make sure they are absolutely dry before replacing them.
Fig. 3.1
A
C
B
E
D
A – Cap, B – Head, C – Notch, D – Base, E – FSD, F – Electrode
ArtNo.316-0007 Gas burner
F
Fig. 3.2
The Single Ring Burners
When retting the burner head, ensure that the notch and
opening lines up with the electrode in the base (Fig. 3.1).
Check that the burner head is level and that the cap is tted
centrally on the burner head.
The Wok Ring Burner
The wok ring burner can also be taken apart for cleaning (Fig.
3.2).
When reassembling the burner (Fig. 3.2), the burner head
(C) has two grooves which aligns with the FSD (E) and the
Electrode (F).
Fit the 2 burner caps, making sure that they are seated
properly.
A – Inner burner cap, B – Outer burner cap,
C – Burner head, D – Burner base, E – FSD, F – Electrode
5
ArtNo.050-0009 Cleaning table 1
Hotplate top
Pan supports
Burner caps
Burner heads
Stainless steel or
glass
Enamel coated
cast iron
Enamel
Aluminium
Hot soapy water and a soft cloth.
remove stubborn stains gently
with a nylon scourer.
Cream cleaner and a nylon
scourer; dishwasher.
Cream cleaner and a nylon
scourer; dishwasher.
Cream cleaner or similar with a
soft cloth. Take care not to be too
vigorous.
PartFinish
Recommended
cleaning method
ArtNo.050-0010 Cleaning table 2
Control panel
Control knobs
Stainless steel or
glass
Plastic and brushed
aluminium
Damp soft cloth. Do not use
abrasive cleaners on the
lettering.
Damp soft cloth.
PartFinish
Recommended
cleaning method
Table 3.1 Cleaning the hotplate
Cleaning Table
Refer to the cleaning tables (Table 3.1 Cleaning the hotplate
and Table 3.2 Cleaning outside the hotplate) for details on
cleaning the hob.
The cleaners listed are available from supermarkets or
electrical retailers. For enamelled surfaces use a cleaner that is
approved fro use on vitreous enamel.
Table 3.2 Cleaning outside the hotplate
6
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