DeLonghi DFG 903 Operation instructions

DFG 903
Professional cooker
Before operating this cooker,
please read these instructions carefully
Users Operating Instructions
GB

2
Dear Customer
Thank you for choosing one of our appliances which has been carefully designed and
built by our specialist staff and thoroughly tested to satisfy your cooking requirement.
We suggest that you read this Instruction Booklet so that you will understand fully how
to operate the appliances.
Please keep the booklet handy. You may wish to refer to it at a later date.
De Longhi

3
Contents
Model DFG 903
Page Number
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Assembling the backguard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Features and technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Control panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Minute counter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
How to use the hob burners . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
How to use the gas oven . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
How to use the grill . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Oven light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Important notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
After sales service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Do’s and do not’s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Care and maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
For the installer
Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Fitting the adjustable feet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
Stability bracket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
Provision for ventilation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
Gas installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
Conversion to LPG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
Lubrication of the gas taps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
Electrical installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34

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Introduction
Congratulations on your purchase of this Delonghi gas cooker which has been carefully
designed and produced to give you many years of satisfactory use.
Before using this appliance it is essential that the following instructions are carefully read and
fully understood.
We would emphasise that the installation section must be fully complied with for your safety
to ensure that you obtain the maximum benefits from your appliance.
Fig. 1
This cooker has been designed, constructed and marketed in compliance with:
- safety requirements of EEC Directive “Gas” 90/396;
- safety requirements of EEC Directive “Low voltage” 73/23;
- protection requirements of EEC Directive “EMC” 89/336;
- requirements of EEC Directive 93/68.
A
B
Backguard
Before installing the cooker, assemble the backguard “C” (fig. 1).
Please note that :
•The backguard “C” can be found
packed at the rear of the cooker.
•Before assembling remove any
protective film/adhesive tape.
•Remove the two spacers “A” and
the screw “B” from the rear of the
cooktop.
•Assemble the backguard as
shown in figure 1 and fix it by
screwing the central screw “B”
and the spacers “A”.
This appliance is designed and manufactured solely for the cooking of domestic
(household) food and in not suitable for any none domestic application and therefore
should not be used in a commercial environmement.
The appliance guarantee will be void if the appliance is used within a none domestic
environnement i.e. a semi commercial, commercial or communal environment.

5
Features and technical data
Fig. 2
2
13
4
6
5
Identification label
When you open the oven
door the indentification label
is at the bottom right hand
side.
Gas burners
1. Triple-ring burner (TC) 3,50 kW
2. Semi-rapid burner (SR) 1,75 kW
3. Rapid burner (R) 3,00 kW
4. Auxiliary burner (A) 1,00 kW
5. Semi-rapid burner (SR) 1,75 kW
6. Auxiliary burner (A) 1,00 kW
Gas oven
– Oven burner 6,20 kW
– Grill burner 4,65 kW
– Oven lamp 15 W
– Usable oven volume 99,5 dm3

6
Control panel
Fig. 3
1 2 34 56 789
CONTROL PANEL - Controls description
1. Gas oven / gas grill control knob
2. Minute counter
3. Front left burner control knob
4. Rear left burner control knob
5. Front central burner control knob
6. Rear central burner control knob
7. Rear right burner control knob
8. Front right burner control knob
9. Oven light control knob

7
Minute counter
Minute counter
The minute counter is a timed acoustic
warning device which can be set for a
maximum of 60 minutes.
The knob (Fig. 4) must be rotated
clockwise as far as the 60 minute
position and then set to the required
time by rotating it anticlockwise.
Fig. 4

8
How to use the hob burners
Hob burners
Each hob burner is controlled by a
separate gas tap operated by a control
knob (fig. 5) which has 3 positions marked
on the control panel, these are:
– Symbol ●: tap closed (burner off)
– Symbol : High (maximum)
– Symbol : Low (minimum)
Push in and turn the knob anti-clockwise
to the selected position.
Lighting of the hob burners
To ignite the burner, the following instructions are to be followed:
1) Lightly press and turn the knob anti-clockwise, and position the knob indicator to the
symbol printed on the control panel (fig. 5).
2) Press the knob to operate the electric ignition; or, in the case of a mains failure light the
burner with a match or lighted taper.
3) Adjust the burner according to the setting required.
Low High
To turn the burner off, fully rotate the knob clockwise to the off position: ●.
The maximum setting of the control tap is for boiling, the minimum setting is for slow
cooking and simmering.
All working positions must be choosen between the maximum and minimum setting, never
between the maximum setting and the “OFF” position.
Fig. 5
Electric ignition
The sparks generated by the electrodes close to the burners will ignite the choosen
burner. Whenever the lighting of the burners is difficult due to peculiar conditions of
the gas features or supply, it is advised to repeat the ignition with the knob on
“minimum” position.

Burners Pan diameter
Auxiliary 12 ÷ 14 cm
Semi-rapid 16 ÷ 24 cm
Rapid 24 ÷ 24 cm
Triple-ring 26 ÷ 28 cm
do not use pans with concave or convex bases
9
Fig. 6a
Choice of burner
The burner must be choosen according to the diameter of the pans and energy required.
Saucepans with handles which are excessively heavy, in relationship to the weight of the
pan, are safer as they are less likely to tip.
Pans which are positioned centrally on burners are more stable than those which are offset.
It is far safer to position the pan handles in such a way that they cannot be accidentally
knocked.
When deep fat frying fill the pan only one third full of oil.
DO NOT cover the pan with a lid and DO NOT leave the pan unattended.
In the unfortunate event of a fire, leave the pan where it is and turn off all controls.
Place a damp cloth or correct fitting lid over the pan to smother the flames.
DO NOT use water on the fire.
Leave the pan to cool for at least 30 minutes.
AIR FLOW
(cooling fan) AIR FLOW (cooling fan) AIR FLOW (cooling fan)
CORRECT USE OF RAPID BURNER
Fig. 6b

10
Correct use of the triple-ring burner
The flat-bottomed pans are to be placed directly onto the pan-support.
To use the WOK you need to place the proper stand in order to avoid any faulty
operation of the triple-ring burner (Fig. 7a - 7b).
Fig. 7a
WRONG
Fig. 7b
CORRECT

11
How to use the gas oven
Lighting the oven gas burner
The thermostat allows the automatic control of the temperature.
The gas delivery to the oven burner is controlled by a two way thermostatic tap (oven
and grill burners) with flame-failure device.
To light the oven burner operate as follow:
1) Open the oven door
2) Lightly press and turn the thermostat knob anti-clockwise to max position “ ”.
3) Press the knob right down to prime the electric ignition.
WARNING: Risk of explosion! The oven door must be open during this operation.
In case of power cut, press the knob and immediately approach a lighted match to the
opening “A” (fig. 8). Never continue this operation for more than 15 seconds. If the
burner has still not ignited, wait for about 1 minute prior to repeating the ignition.
4) Wait about 10/15 seconds after the burner lighting before releasing the knob (time of priming
of the valve).
5) Close the oven door slowly and adjust the burner
according to the power required.
Should the flame of the burner estinguish
for any reason, the safety valve will cut off
automatically the gas flow to the tap.
To re-start operation, take the knob to “off”
position, wait for at least 1 minute and
repeat operations as above explained.
Oven thermostat
The oven thermostat (fig. 9) is marked with
numbers, these correspond to the oven
temperature, in addition the “OFF” position is
shown by the
symbol ●.
To choose the
required oven
temperature (check
with the “Oven
cooking
temperatures”), turn
the control knob until
its line mark is level
with the number
required on the
control panel (facia). Fig. 8
A
Fig. 9

12
Oven cooking temperatures
MARK APPROX. HEAT OF TYPE OF DISH TO COOK
TEMP. OVEN
150 150°C Very cool Meringue cakes,
oven slow cooking items
• 165°C Cool or Milk puddings, very rich fruit
slow oven cakes, i.e., Christmas
180 180°C Cool or Stews, casseroles, braising,
slow oven rich fruit cakes, i.e., Dundee
• 195°C Warm oven Biscuits, rich plain cakes
i.e., Madeira. Low temp. roasting
210 210°C Moderate Plain cakes, Victoria
oven sandwich, raised meat pies
• 225°C Fairly hot Small cakes, savoury flans,
oven fish
240 240°C Hot oven Plain cakes and buns, swiss rolls,
fruit pies. High temp. roasting
• 245°C Moderately Bread and bread rolls etc., scones,
hot oven flaky and rough puff pastry,
yorkshire pudding
270 270 Very hot Sausage rolls, mince pies, puff
• 285 oven pastry, pizza
Browning ready cooked dishes

13
How to use the gas grill
Lighting the grill gas burner
The grill burner generates the infra-red rays for grilling.
To light the grill burner operate as follow:
1) Open the oven door.
2)
Lightly press and turn the thermostat knob clockwise to the position (fig. 11).
3) Press the knob right down to prime the electric ignition.
WARNING: Risk of explosion! The oven door must
be open during this operation.
In case of power cut, press the knob and put a lighted
match to the right and left side of the burner (fig. 10).
Never continue this operation for more than 15
seconds. If the burner has still not ignited, wait
for about 1 minute prior to repeating the ignition.
4) Wait about 10/15 seconds after the burner lighting
before releasing the knob (time of priming of the
valve).
5) Half-close the oven door slowly.
Should the flame of the burner estinguish for
any reason, the safety valve will cut off
automatically the gas flow to the tap. To re-start
operation, take the knob to “off” position, wait for at least 1 minute and repeat
operations as above explained.
Do not grill with oven door closed.
Always fit the heat shield supplied with the cooker under the front panel
before commencing operations (Fig. 12).
WARNING. The heat shield and the oven door reaches a very high temperature
whilst in use. Keep children away and allow to cool before removing.
Fig. 10
Fig. 11

14
Notes:
– The grill burner has only one setting, that is full-on
– It is important that the heat shield is fitted the correct way up, as shown in the figure 12.
Oven light
Fig. 13
The cooker is equipped with a light that illuminates
the oven to enable visually controlling the food
that is cooking.
This light is controlled by a switch knob (fig. 13).
Fig. 12
IMPORTANT WARNING
For best results when using the grill, place the shelf on the second level and when using the
grill pan handle avoid contact with the heat shield which will be
HOT during use

15
Important notes
Installation, and any demonstration, information or adjustments are not included in the
warranty.
The cooker must be installed by a qualified person in accordance with the Gas Safety
(Installation and Use) (Amendment) Regulations 1990 and the relevant building/l.E.E
Regulations.
Failure to install the appliance correctly could invalidate any manufacturers warranty and
lead to prosecution under the above quoted regulation.
In the UK C.O.R.G.I registered installers are authorised to undertake the installation and
service work in compliance with the above regulations. All Comet authorised installers are
C.O.R.G.I. registered.
Attention
The appliance gets very hot, mainly around the cooking areas. It is very important
that children are not left alone in the kitchen when you are cooking.
After Sales Service
If you should require After Sales Service please contact your nearest COMET Service Centre.
For technical information telephone the Comet Customer Help Line 0113 2793520.

16
Do’s and do not’s
Do’s and do not’s
• Do always grill with the oven door ajar and with heat baffle mounted.
• Do read the user instructions carefully before using the cooker for first time.
• Do allow the oven to heat for one and a half hours, before using for the first time, in order
to expel any smell from the new oven insulation, without the introduction of food.
• Do clean your oven regularly.
• Do remove spills as soon as they occur.
• Do always use oven gloves when removing food shelves and trays from the oven.
• Do not allow children near the cooker when in use.
• Do not allow fat or oils to build up in the oven trays, or oven base.
• Do not place cooking utensils or plates directly onto the oven base.
• Do not grill food containing fat without using the grid.
• Do not cover the grilling grid with aluminium-foil.
• Do not use the oven tray for roasting.
• Do not place hot enamel parts in water. Leave them to cool first.
• Do not allow vinegar, coffee, milk, saltwater, lemon or tomato juice to remain in contact
with enamel parts (inside the oven and on the oven tray).
• Do not use abrasive cleaners or powders that will scratch the surface of the stainless steel
and the enamel.
• Do not attempt to repair the internal workings of your oven.
• Do remove the protective film before the first use.
• Fire risk! Do not store flammable material in the oven and in the storage compartment.
For your safety
The product should only be used for its intended purpose which is for the cooking of
domestic foodstuffs.
Under no circumstances should any external covers be removed for servicing or
maintenance except by suitably qualified personnel.

17
Cleaning the hob
Spillage on the hob can usually be removed by a damp soapy cloth. More obstinate stains
can be removed by rubbing gently with a soapy scouring pad or mild household cleaner.
Important:
As a safety measure, before you start cleaning the cooker be sure to disconnect it from the
mains supply.
Do not use a steam cleaner because the moisture can get into the appliance thus
make it unsafe.
Care and maintenance
Gas taps
If a tap becomes stiff, do not force; contact your local COMET Service Centre.
Flexible tube
From time to time, check the flexible tube connecting the gas supply to the cooker.
It must be always in perfect condition; in case of damage arrange for it to be replaced by a
C.O.R.G.I. registered installer.
Cleaning oven parts after use
The oven interior and the chromium plated shelves can be cleaned by damp soapy cloth.
Obstinate stains can be removed with nylon scouring pads and gentle, non-abrasive, liquid
cleaner. Provided the oven is wiped over immediately after roasting, only the minimum of
cleaning should be necessary.
Stainless steel surfaces
The stainless steel front panels on this cooker (facia, oven door, drawer or storage
compartment) are protected by a finger-print proof lacquer. To avoid damaging this
lacquer, do not clean the stainless steel with abrasive cleaners or abrasive cloths or scouring
pads.
ONLY SOAP/WARM WATER MUST BE USED TO CLEAN THE STAINLESS STEEL SURFACES.

18
Burners
They can be removed and washed only with
soapy water.
Detergents can be used but must not be
abrasive or corrosive.
Do not use abrasive sponges or pads.
Do not put in dishwasher.
After each cleaning, make sure that the burner-
caps, as well as the burners, have been well
wiped off and CORRECTLY POSITIONED.
It is essential to check that the burner flame
distributor F and the cap C has been correctly
positioned (see fig. 14) - failure to do so can
cause serious problems.
Check that the electrode “S” (fig. 14) is always
clean to ensure trouble-free sparking.
Note:
The electrode S must be very carefully
cleaned.
To avoid damage to the electric ignition
do not use it when the burners are not in
place.
Triple ring burner
The triple ring burner must be correctly positioned (see fig. 15); the burner rib must be
enter in their logement as shown by the arrow.
The burner correctly positioned must not rotate (fig. 16).
Then position the cap Aand the ring B(fig. 16).
Fig. 15 Fig. 16
AB
F
C
S
Fig. 14

19
Storage compartment
– The storage compartment is accessible through the pivoting panel.
Fig. 17
Fig. 18
Removal of the inner glass door panel
–The inner glass door panel can easily be removed for cleaning by unscrewing
the four screws (fig. 17).
–When re-assembly ensure that the inner glass is correctly positioned and do not
over tighten the screws.
Changing the oven light
1. Disconnect the electrical power supply (for example, by switching off the main
power switch).
2. Unscrew the light cover
3. Fit a new bulb.
4. Refit the cover.
Note:
Use only bulbs designed to resist up to 300°C with the following characteristics: 15 W,
230 V, type E-14.
Spare bulbs can be ordered from Accessories direct telephone [phone].

20
Oven floor
The oven floor “F” (fig. 21) can be easily removed to facilitate cleaning.
Remember to replace the floor correctly afterwards.
Be careful not to confuse the tray “L” with the oven floor “F”.
Fig. 21
L
F
Assembling and removing the side racks
Hang up the wires racks on the oven walls (fig. 19)
Slide the required grid or tray into the guides (fig. 20).
Fig. 19 Fig. 20