Blue Seal G50 User manual

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Revision 3/F3601
SERVICE MANUAL
G50 / G50-8 GAS RANGE

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WARNING: ALL INSTALLATION AND SERVICE REPAIR WORK MUST BE CARRIED
OUT BY QUALIFIED PERSONS ONLY.

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CONTENTS
This manual is designed to take a more in depth look at the G50 gas ranges for the purpose of
making the units more understandable to service people.
There are settings explained in this manual that should never require to be adjusted, but for
completeness and those special cases where these settings are required to change, this manual
gives a full explanation as to how, and what effects will result.
SECTION PAGENO.
1. SPECIFICATIONS ........................................................................................................ 5
2. INSTALLATION ............................................................................................................ 8
3. OPERATION ................................................................................................................. 10
3.1 Operation
3.2 Explanation of Control System
4. MAINTENANCE ............................................................................................................ 12
5. TROUBLE SHOOTING GUIDE..................................................................................... 13
5.1 Hob
5.2 Oven
6. SERVICE PROCEDURES............................................................................................. 17
6.1 Fault Diagnosis
6.2 Access
6.3 Replacement
6.4 Adjustment / Calibration
7. SPARE PARTS ............................................................................................................. 31
8. PARTS DIAGRAM ........................................................................................................ 32
8.1 Main Assembly
8.2 Gas Piping Assembly
9. SERVICE CONTACTS .................................................................................................. 38
IMPORTANT: MAKING ALTERATIONS MAY VOID WARRANTIES AND APPROVALS.

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1. SPECIFICATIONS
Dimensions shown in millimetres.
LEGEND
- Gas connection entry point - ¾” BSP male
G50 A G50 B
G50 C G50 D
MODEL: G50

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Dimensions shown in millimetres.
LEGEND
- Gas connection entry point - ¾” BSP male
MODEL: G50-8
G50-8 A
G50-8 C
G50-8 B
G50-8 D

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INSTALLATION CLEARANCES
Non-Combustible Combustible
Sides 0 mm 25 mm
Back 25 mm 25 mm
CATEGORY
I2H, I3P
HEAT INPUT
Input Gas Rate
G20 G31
G50 D 36.0 kW 3.45 m³/h 2.54 m³/h
G50 C 31.5 kW 3.02 m³/h 2.22 m³/h
G50 B 27.0 kW 2.59 m³/h 1.89 m³/h
G50 A 22.5 kW 2.16 m³/h 1.57 m³/h
G50-8 D 46.0 kW 4.41 m³/h 3.25 m³/h
G50-8 C 41.5 kW 3.98 m³/h 2.93 m³/h
G50-8 B 37.0 kW 3.55 m³/h 2.60 m³/h
G50-8 A 22.5 kW 3.12 m³/h 2.29 m³/h
GAS PRESSURE
Natural 10 mbar (4.0” w.g)
Propane 37 mbar (14.8” w.g)
GAS CONNECTION SPECIFICATIONS
R¾ BSP male
INJECTOR SIZES
Natural (G20) Propane (G31)
Open Burners
Main Ø1.90 mm Ø1.10 mm
Pilot Ø0.32 mm Ø0.20 mm
Griddle
Main Ø2.10 mm Ø1.20 mm
Pilot Ø0.32 mm Ø0.20 mm
Oven
Main Ø2.80 mm Ø1.50 mm
Pilot Ø0.32 mm Ø0.20 mm
INDIVIDUAL FEATURES
Spillage tray: Vitreous enamelled 20 gauge
trays.
297mm x 625 mm x 13mm.
Trivets: Self locating, vitreous enamelled
cast iron.
293mm x 358mm x 43mm
WEIGHT (NETT)
G50 D 220 kg
G50-8 D 295 kg
OVEN INTERNAL DIMENSIONS
Height 430 mm
Width 665 mm
Depth 660 mm

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It is important that this oven is installed
correctly, and that the operation is correct
before handing over to the user.
This appliance must be installed in
accordance with national installation codes
and in accordance with relevant national /
local codes covering gas and fire health.
UNITED KINGDOM - Gas Safety (Installation
& Use) Regulations 1984 (Amendment
1990).
NOTE:
Do not store or use gasoline or any other
flammable vapours or liquids in the vicinity of
this or any other appliances.
Do not obstruct or block the appliance’s flue.
Never directly connect a ventilation system to
the appliance flue outlet.
Installation must allow for sufficient flow of
fresh air for the combustion air supply.
Installation must include adequate ventilation
means, to prevent dangerous build up of
combustion products.
2.1 BEFORE CONNECTION
Check the type of gas, the specified operating
pressure and the hourly consumption. This
information is clearly stated on the rating plate
which is located to the left of the control panel.
When checking pressure, be certain that all
other equipment on the same gas line is
turned on.
Check the gas supply characteristics for the
type of gas, supply line pressure and capacity.
A regulator is supplied with appliances for use
on natural gas. (These should be fitted only
by a licensed gas fitter).
The operating pressures for the respective
gases are:
Natural (G20) 1.0kPa / 10 mbar (4.0" WG)
Propane (G31) 3.7kPa / 37 mbar (14.8" WG)
The pressure test point for measurement of
correct appliance operating pressure is
located at the hob left front corner.
2. INSTALLATION
On Propane gas the pressure is controlled by
the supply pressure.
On Natural gas the pressure is controlled by
the appliance’s regulator, which can be
adjusted to obtain correct operating pressure.
2.2 ASSEMBLY
1) Tilt the oven onto its LH side and fit both
the right front leg and right rear roller in
the corresponding leg rings.
2) Secure each one in place with the screw
attached.
3) Lift up the LH side of the oven, then fit and
secure the front LH leg and rear LH roller
as described in (1) and (2).
4) Check that all are in place and tightened
firmly.
5) Adjust the two front feet to make the oven
steady and level.
Gas Connection
1) The gas regulator is supplied only for
connection to a Natural gas supply.
2) Units for use on Propane gas do not have
a regulator supplied, as the pressure is
controlled by a supply regulator at the
Propane gas supply tank.
3) It is important that adequately sized piping
runs directly to the connection joint on the
unit, with as few tees and elbows as
possible to give maximum supply volume.
4) An accessible shut-off valve must be fitted
on the supply line before the connection
joint and pressure regulator.
5) A suitable jointing compound which resists
the breakdown action of LP Gas must be
used on every gas line connection, unless
compression fittings are used.
6) Check all connections for leakage.
DO NOT USE A FLAME
WARNING: ALL INSTALLATION AND SERVICE REPAIR WORK MUST BE CARRIED
OUT BY QUALIFIED PERSONS ONLY.

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Location
1) It is important to have a minimum of
25mm (1") of air space at the rear and
sides of the unit from combustible
surfaces.
2) It is important to have a minimum of 1100
mm top clearance above the cooking
surface to a non-combustible ceiling or
shelf and a minimum of 1500mm top
clearance above the cooking surface to a
combustible ceiling of shelf.
2.3 COMMISSIONING
Before leaving the new installation, check that
the gas pressures are correct (refer to the
specifications section). Then check operation
of the unit as detailed in the operation section.
NOTE:
If for some reason it is not possible to get the
appliance to function correctly, contact the
supplier.
Shut off the gas supply before any
maintenance work is done on the appliance.
Operate the oven for about one hour to
remove any fumes or odours which may be
present.
2.4 RATING PLATE LOCATION
The rating plate for G50 ranges is located to
the left of the control panel.
Figure 2.1
Rating plate

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3.1.3 OVEN
1) Open oven doors. Push in thermostat
knob and rotate anti-clockwise to the
PILOT ( ) position.
2) Hold in the thermostat knob.
3) With the thermostat knob held in, light the
pilot burner by pressing the piezo button.
View the lit pilot burner through the
inspection hole.
4) Release knob approximately 10 seconds
after lighting pilot.
5) Pilot should now remain alight - if not,
repeat steps 2 to 4.
6) The oven temperature can now be set by
rotating the control knob anticlockwise to
any position from the 1 - 7 markings. The
control knob requires to be slightly
depressed when starting from the pilot
position, however once out of the pilot
position it can be freely turned up or
down.
See the temperature conversion chart
below for oven centre temperatures
obtained at the gas mark settings 1 - 7.
3. OPERATION
NOTE: A full user’s operation manual is supplied with the product and can be used for further
referencing of installation, operation and service.
3.1.1 HOB OPEN BURNERS
Flame Failure Protection is incorporated by
way of a thermo-electric system for each
burner which will shut off the gas supply to
that burner in the event that the burner goes
out, so that raw gas is not expelled.
1) Select the burner, depress and turn the
corresponding knob anti-clockwise to full
position ( ).
2) With control knob depressed, light burner.
3) Release knob approximately 10-20
seconds after lighting burner.
4) Burner should stay alight - if not, repeat
Steps 2-3.
5) The burner can now be operated. At this
position it is full ( ).
6) To achieve simmer control, depress knob
and rotate fully anti-clockwise. Or operate
between full ( ) and low ( ) positions.
7) When main burner is not required, turn
knob clockwise back to the off position.
3.1.2 GRIDDLES
1) Depress the control knob and rotate anti-
clockwise to the pilot ( ) position.
2) With the control knob depressed, press
the piezo button to ignite the pilot burner.
Repeat until lit.
3) Release knob approximately 10 seconds
after lighting pilot.
4) Pilot should now remain alight - if not,
repeat steps 2 to 4.
5) Full flame can now be achieved by
rotating control anti-clockwise to the first
stop ( ).
6) Low flame can be achieved by depressing
the control knob and rotating fully anti-
clockwise ( ).
3.1 OPERATION
Gas Mark 1 2 3 4 5 6 7
Temp °C 100 130 160 190 225 260 290

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SAFETY SYSTEM
The purpose of the safety system is to shut off
the flow of gas if the flame goes out. It is
comprised of the flame itself, the
thermocouple, and the flame failure gas valve.
The burner flame is lit by holding in the gas
control knob, which in turn temporarily pushes
the plunger inside the safety valve open and
allows gas to flow through. Once the burner
is lit, the thermocouple will begin to generate
millivolts (after about 10 to 30 seconds of
being heated) and will energize the
electromagnet inside the gas valve. Once
energized the electromagnet holds the
plunger inside the gas valve in the open
position. The plunger has to have been
pushed all the way in for the electromagnet to
be able to hold it in place. If the burner flame
goes out for some reason, the thermocouple
will cool after about 10 to 30 seconds and
stop generating millivolts. The electromagnet
will then de-energize, and the plunger will
snap shut, cutting off the flow of gas.
Detail of each component in the safety system
is explained below.
THERMOCOUPLE
The thermocouple is a device that generates
electricity when heat is applied to the tip.
The tip of the thermocouple is located in the
burner flame, and the nut at the other end of
the thermocouple screws into the back of the
gas valve. Inside the copper tubing is a wire
which is joined at the tip but insulated from the
rest of the tubing. These two parts (the
copper tubing and wire) make up the "wiring"
for an electrical circuit. When these two
dissimilar metals, wire and tip, are heated an
electrical voltage is produced. This type of
thermocouple generates between 7 and 30
millivolts when heated in the pilot flame.
Figure 3.1
3.2 EXPLANATION OF CONTROL
SYSTEM
Insulator Nut Conductor Tip
Internal
Wire
position, stopping the flow of gas.
Millivolts are provided to the electromagnet by
the thermocouple (not shown) which
generates millivolts when heated. The
thermocouple screws into a fitting at the back
of the gas valve to make an electric
connection. By pressing in the gas control
knob, the plunger can be temporarily held
open while lighting. There's two reasons for
this; gas has to flow through the safety valve
to make it possible to light the burner, and
secondly the plunger has to be pushed all the
way in for the electromagnet to hold it in. I.e.;
the electromagnet is strong enough to hold
the plunger in once there, but is not strong
enough to pull it in by itself. Sometimes a
problem with the flame not staying lit after
releasing the button can be attributed to not
pushing the plunger all the way in.
The Troubleshooting Guide (Section 5) should
be used to identify any incorrect operation.
On correct identification of the operating fault
the Troubleshooting Guide will make
reference to the corrective action required, or
refer to the Fault Diagnosis section and/or
Inside the body of the gas valve is an
electromagnet connected to a spring loaded
plunger. When the electromagnet is
energized, it holds the plunger in, allowing gas
to flow through the valve. When the
electromagnet is
de-energized, the plunger snaps to the closed
Figure 3.2
Thermocouple
Gas flow
Electromagnet
Plunger
Shaft
Knob
Gas flow Plunger
ELECTROMAGNETIC FLAME FAILURE
GAS VALVE
The purpose of the safety valve is to shut off
the flow of gas if the pilot flame goes out.

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4. MAINTENANCE
EXTERIOR
Clean with detergent. Baked on deposits or
discoloration may require a good quality
stainless steel cleaner or stainless steel wool.
Always apply cleaner when the unit is cold
and rub in the direction of the grain.
INTERIOR
Do not use wire brushes, steel wool or other
abrasive materials. Clean the oven regularly
with a good quality domestic oven cleaner.
Once a week, remove and clean built up
grease etc. from the oven racks and bottom
spill over cover.
MAINTENANCE
To achieve the best results cleaning must be
regular and thorough, and all controls and
mechanical parts checked and adjusted
periodically by a competent serviceman. If
any small faults occur, have them attended to
promptly. Don't wait until they cause a
complete breakdown. It is recommended that
a service check is conducted every 6 months.
NOTE: The gas supply must be OFF during
cleaning or maintenance.
4.1 CLEANING
It is recommended that a service check is
conducted every six months.
1) Visual check of the pilot and main burners,
to see if correct size flame, and colour on
main burner.
2) Check the gas pressure with a manometer
(water gauge).
3) Check and clean inside control area,
making sure that all connections are
secure.
4) Check condition of the gas supply pipe,
regulator and fittings.
5) Check for gas leaks at all fittings inside
and outside the unit.
6) Check gas control operation, smooth to
operate. Regrease gas controls if
required (refer service section).
7) Check thermocouple operation, burner
should hold quickly after lighting, replace
thermocouple if required.
8) Adjust the door ball catches. Check the
striker plates for wear.
4.2 ROUTINE PROCEDURES

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5. TROUBLE SHOOTING
WARNING: ALL INSTALLATION AND SERVICE REPAIR WORK MUST BE CARRIED
OUT BY QUALIFIED PERSONS ONLY.
5.1 HOB
Open Burners
FAULT POSSIBLE CAUSE REMEDY
MAIN BURNERS WILL NOT
LIGHT
Wrong size or blocked injectors.
Obstruction in burner.
Incorrect supply pressure.
Faulty gas control.
Replace / clean injectors.
(Refer service section 6.3.2)
Clean burner.
Check supply pressure.
Replace gas control.
(Refer service section 6.3.4)
MAIN BURNER GOES OUT
WHEN KNOB RELEASED
Releasing knob before the
thermocouple is heated.
Thermocouple faulty.
(Refer fault diagnosis 6.1.1)
Gas magnet faulty.
(Refer fault diagnosis 6.1.1)
Hold control in for longer (30 s),
see if pilot will stay lit.
Replace thermocouple.
(Refer service section 6.3.3)
Replace gas magnet.
(Refer service section 6.3.13)
NO LOW FIRE Incorrect supply pressure.
Low fire adjustment incorrect.
Check supply pressure.
Adjust.
(Refer service section 6.4.3)
MAIN BURNER FLAME
INCORRECT COLOUR
(YELLOW / WAVY)
Aeration setting incorrect. Adjust aeration.
(Refer service section 6.4.1)

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FAULT POSSIBLE CAUSE REMEDY
PILOT BURNER WILL NOT
LIGHT
No gas supply.
Gas pressure too low.
Blocked pilot injector.
Knob on gas control won’t go
fully in.
Ensure gas supply is connected
and on (bottles not empty).
Check gas supply pressure.
(Refer specifications section)
Clean or replace pilot injector.
(Refer service section 6.3.8)
Remove obstruction / correct
control panel mounting.
Replace gas control.
(Refer service section 6.3.12)
PILOT FLAME SMALL / LAZY
/ YELLOW
Gas pressure too low.
Blocked pilot injector.
Check gas supply pressure.
(Refer specifications section)
Clean or replace pilot injector.
(Refer service section 6.3.8)
PILOT GOES OUT WHEN
KNOB RELEASED
Releasing knob before the
thermocouple is heated.
Pilot flame too small.
(Refer fault:Pilot Flame Small)
Thermocouple faulty.
(Refer fault diagnosis 6.1.2)
Gas magnet faulty.
(Refer fault diagnosis 6.1.2)
Hold control in for longer (30 s),
see if pilot will stay lit.
Correct fault.
Replace thermocouple.
(Refer service section 6.3.9)
Replace gas magnet.
(Refer service section 6.3.13)
GRIDDLE BURNER WILL NOT
LIGHT
Wrong size or blocked injectors.
Obstruction in burner.
Incorrect supply pressure.
Faulty gas control.
Replace / clean injector.
(Refer service section 6.3.6)
Clean burner.
Check supply pressure.
Replace gas control.
(Refer service section 6.3.12)
PILOT GOES OUT WHEN
MAIN BURNER COMES ON
Incorrect gas pressure.
Faulty gas control.
Check supply / adjust pressure.
(Refer specifications section)
Replace gas control.
(Refer service section 6.3.12)
PIEZO IGNITOR NOT
SPARKING
Short in high tension lead.
(Refer fault diagnosis 6.1.3)
Piezo faulty.
(Refer fault diagnosis 6.1.3)
Replace lead.
(Refer service section 6.3.11)
Replace piezo.
(Refer service section 6.3.10)
NO LOW FIRE Incorrect supply pressure.
Low fire adjustment incorrect.
Check supply pressure.
Adjust.
(Refer service section 6.4.3)
Griddle Burners

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5.2 OVEN
FAULT POSSIBLE CAUSE REMEDY
PIEZO IGNITOR NOT
SPARKING
Short in high tension lead.
(Refer fault diagnosis 6.1.3)
Piezo faulty.
(Refer fault diagnosis 6.1.3)
Replace lead.
(Refer service section 6.4.1)
Replace piezo.
(Refer service section 6.4.2)
PILOT WON’T LIGHT Knob on gas control won’t go
fully in.
No gas supply.
Gas pressure too low.
Blocked pilot spud.
Remove obstruction. Correct
control / wrapper mounting.
Replace gas control.
(Refer service section 6.4.4)
Ensure gas is connected and
on (bottles not empty).
Check gas supply pressure.
(Refer specifications section)
Clean or replace pilot spud.
Refer service section 6.4.6)
PILOT FLAME SMALL Gas pressure too low.
Pilot adjustment screw out of
adjustment.
Pilot spud restricted.
Check gas supply pressure.
(Refer specifications section)
Adjust pilot adjustment screw.
(Refer service section 6.5.6)
Clean pilot spud.
(Refer service section 6.4.8)
PILOT GOES OUT WHEN
KNOB RELEASED
Releasing knob before the
thermocouple heated.
Pilot flame too small.
(Refer fault:Pilot Flame Small)
Thermocouple faulty.
(Refer fault diagnosis 6.1.2)
Hold control in for longer (30 s),
see if pilot will stay lit.
Correct fault.
Replace thermocouple.
(Refer service section 6.4.9)
PILOT FLAME YELLOW /
LAZY
Gas pressure incorrect.
Restriction in pilot spud or
aeration.
Check gas supply pressure.
(Refer specifications section)
Clean or replace as required.
(Refer service section 6.4.8)
PILOT GOES OUT WHEN
MAIN BURNER COMES ON
Incorrect gas pressure.
Faulty gas control.
Check supply / adjust pressure.
(Refer specifications section)
Replace gas control.
(Refer service section 6.4.4)
PILOT GOES OUT WHILE
OVEN IN USE, CAN RE-LIGHT
Gas supply - incorrect or
fluctuating pressure.
Thermocouple faulty.
(Refer fault diagnosis 6.1.2)
Draught at installation (blowing
pilot out).
Check supply / adjust pressure.
Replace thermocouple.
(Refer service section 6.4.9)
Shield oven from excessive
breeze.

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FAULT POSSIBLE CAUSE REMEDY
MAIN BURNERS WILL NOT
LIGHT
Wrong size or blocked injectors.
Small pilot flame.
(Refer fault:Small Pilot Flame)
Faulty gas control.
Incorrect supply pressure.
Replace / clean injectors.
(Refer service section 6.4.6)
Correct fault.
Replace gas control.
(Refer service section 6.4.4)
Check supply correct pressure.
BURNERS DO NOT BURN
CORRECTLY (ROAR /LIGHT
BACK /INCORRECT COLOUR)
Incorrect supply pressure.
Burner aeration incorrect.
Incorrect injector sizes.
Burner faulty.
Check supply pressure.
Adjust burner aeration slide.
(Refer service section 6.5.1)
Check injector sizes and
replace if necessary.
(Refer service section 6.4.6)
Replace burner.
(Refer service section 6.4.5)
SET TEMPERATURE NOT
REACHED
Gas supply fluctuating.
Gas control faulty.
Thermostat out of calibration.
Check supply correct pressure.
Replace gas control.
(Refer service section 6.4.4)
Recalibrate thermostat.
(Refer service section 6.5.7)
OVEN TOO HOT Thermostat out of calibration. Recalibrate thermostat.
(Refer service section 6.5.7
DOOR DOES NOT CLOSE Tray in way of door.
Door catch setting incorrect.
Door hinges / pins worn.
Correctly position tray in rack.
Adjust.
(Refer service section 6.5.9)
Replace.
(Refer service section 6.4.10)

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6. SERVICE PROCEDURES
WARNING: ALL INSTALLATION AND SERVICE REPAIR WORK MUST BE CARRIED
OUT BY QUALIFIED PERSONS ONLY.
SECTION PAGENO.
6.1 FAULT DIAGNOSIS .............................................................................................................19
6.1.1 Hob Burner Goes Out When Knob Released......................................................19
6.1.2 Pilot Goes Out When Control Knob Released.....................................................19
6.1.3 Piezo Ignitor Not Sparking...................................................................................19
6.2 ACCESS ...............................................................................................................................20
6.2.1 Hob Control Panel ...............................................................................................20
6.2.2 Oven Control Panel .............................................................................................20
6.2.3 Oven Burner ........................................................................................................20
6.2.4 Right Hand Side Panel ........................................................................................20
6.3 REPLACEMENT - HOB........................................................................................................21
6.3.1 Open Burner ........................................................................................................21
6.3.2 Open Burner Injector ...........................................................................................21
6.3.3 Open Burner Thermocouple ................................................................................21
6.3.4 Open Burner Gas Control....................................................................................21
6.3.5 Griddle Burner .....................................................................................................22
6.3.6 Griddle Burner Injector ........................................................................................22
6.3.7 Griddle Burner Pilot .............................................................................................22
6.3.8 Griddle Burner Pilot Injector ................................................................................22
6.3.9 Griddle Burner Pilot Thermocouple .....................................................................23
6.3.10 Griddle Burner Piezo Ignitor ................................................................................23
6.3.11 Griddle Burner H.T. Lead ....................................................................................23
6.3.12 Griddle Burner Gas Control.................................................................................23
6.3.13 Gas Magnet .........................................................................................................24
6.4 REPLACEMENT - OVEN......................................................................................................24
6.4.1 Oven H.T. Lead ...................................................................................................24
6.4.2 Oven Piezo Electrode..........................................................................................24
6.4.3 Oven Piezo Ignitor ...............................................................................................24
6.4.4 Oven Gas Control................................................................................................25
6.4.5 Oven Burner ........................................................................................................25
6.4.6 Oven Burner Injector ...........................................................................................25
6.4.7 Oven Pilot Burner ................................................................................................26
6.4.8 Oven Pilot Burner Injector ...................................................................................26
6.4.9 Oven Thermocouple ............................................................................................26
6.4.10 Door Hinge ..........................................................................................................27
6.4.11 Door Catch ..........................................................................................................27
WARNING: ALWAYS CHECK/TEST FOR GAS LEAKS AFTER SERVICE REPAIRS ON
THE GAS SYSTEM.

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6.5 ADJUSTMENT / CALIBRATION ..........................................................................................27
6.5.1 Burner Aeration ...................................................................................................27
6.5.2 Re-greasing Gas Control.....................................................................................27
6.5.3 Hob Low Fire Adjustment ....................................................................................28
6.5.4 Oven High Fire Adjustment .................................................................................28
6.5.5 Oven Low Fire Adjustment ..................................................................................28
6.5.6 Oven Pilot Adjustment .........................................................................................29
6.5.7 Thermostat Calibration ........................................................................................29
6.5.8 Door Ball Catch Setting .......................................................................................30
6.5.9 Door Alignment....................................................................................................30

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6.1 FAULT DIAGNOSIS
Short in high tension lead
If repeated sparking of the piezo shows
intermittent sparking at the electrode, then the
lead should be traced to find area of short.
This can normally be visually seen as the
spark arcs. If the lead is shorting the best
solution is to replace it, as the electrical
insulation strength of the lead may have
deteriorated.
If the spark arc can be seen at the electrode
insulator at the pilot burner instead of at the
electrode tip, then the insulator probably has a
fracture and should be replaced.
Piezo ignitor faulty
If no spark at all can be generated, remove
piezo ignitor and hold close to the hob body,
depress piezo ignitor and if a spark cannot be
generated to hob body the piezo ignitor is
faulty and should be replaced.
NOTE: If piezo ignition fails, the pilot can be
manually lit in the interim until the piezo circuit
is repaired. A standard taper torch or
matches/lighter can be used for manual
back-up ignition.
6.1.3 PIEZO IGNITOR NOT SPARKING
6.1.1 HOB BURNER GOES OUT WHEN
KNOB RELEASED
Thermocouple faulty
Inspect thermocouple for build-up of carbon or
food deposits on the tip. Clean off any
deposits, taking care not to scratch off the
aluminium coating on the thermocouple.
Check that the thermocouple tip is in the
flame zone of the burner. When the burner is
lit, the flame should impinge on the top 5mm
of the thermocouple tip.
NOTE: The thermocouple should not touch
the burner.
Check thermocouple connection to gas
control is firm (loose connections will cause
resistance in millivolt circuit and result in flame
outage).
If connection is OK, then disconnect the
thermocouple from the gas control, light the
burner, and whilst holding the control knob in,
measure voltage between the thermocouple
and earth (e.g. the body of the gas control).
This should read approximately 30mV. If this
reading is less than 10mV then the
thermocouple is faulty—replace.
Gas magnet faulty
If thermocouple milli-voltage is above 10mV,
and the burner still will not hold, then the gas
magnet is faulty - replace.
6.1.2 PILOT GOES OUT WHEN CONTROL
KNOB IS RELEASED
Pilot flame too small
If pilot can be lit but the flame is too small to
impinge on the thermocouple, then check the
gas pressure. If ok, remove pilot injector from
pilot burner and check for blockages and/or
correct size.
Thermocouple faulty
Inspect thermocouple for build-up of carbon or
food deposits on the tip. Clean off any
deposits, taking care not to scratch off the
aluminium coating on the thermocouple.
Check that the thermocouple tip is in the
flame zone of the pilot burner. When the
burner is lit, the flame should impinge on the
top 5mm of the thermocouple tip.
NOTE: The thermocouple should not touch
the burner.
Check thermocouple connection to gas
control is firm (loose connections will cause
resistance in millivolt circuit and result in pilot
outage).
If connection is OK, then disconnect the
thermocouple from the gas control, light the
pilot, and whilst holding the control knob in,
measure voltage between the thermocouple
and earth (e.g. the body of the gas control).
This should read approximately 30mV. If this
reading is less than 10mV then the
thermocouple is faulty—replace.
Gas magnet faulty
If thermocouple milli-voltage is above 10mV,
and the pilot still will not hold, then the gas
magnet is faulty - replace.

-20-
Revision 3/F3601
One screw
6.2 ACCESS
6.2.1 HOB CONTROL PANEL
1) Remove all gas control knobs by pulling
away from the control panel.
2) Remove the two screws securing the
control panel to the hob.
3) Remove the control panel.
Two screws
Figure 6.2.1
6.2.2 OVEN CONTROL PANEL
1) Remove the one screw at the top centre of
the control panel.
2) The control panel will now hinge along
bottom edge.
One screw
Figure 6.2.2
6.2.3 OVEN BURNER
1) Open oven doors.
2) Remove all racks and trays from inside
oven.
3) Remove enamelled tray from bottom of
oven.
4) Remove flame baffle from oven (one
screw).
6.2.4 RH SIDE PANEL
1) Remove two screws at rear of oven.
Figure 6.2.3
Figure 6.2.4
2) Slide RH side panel towards rear of oven
and remove.
Figure 6.2.5