air-o-steam 57 Series User manual

DOC. NO. 5958 785 01
EDITION 2 J 0107
air - o - steam
®
Series 57
6 GN 1/1
10 GN 1/1
20 GN 1/1
20 GN 2/1
USER MANUAL
GB English Page 1 - 21
DE Deutsch Page 1 - 22
FR Français Page 1 - 24
ELECTRIC CONVECTION STEAMER
I - 450 - BE I - 450 - BE, I - 432 - B, I - 456 - BF

2I-450-BE
Model Capacity Dimensions mm Weight Noise
Height Width Depth kg level
5711-3 6 x 1/1GN 715 890 784 120 < 70 dB (A)
5712-3 10 x 1/1GN 941 890 928 170 < 70 dB (A)
5714-3 20 x 1/1GN 1748 890 928 250 < 70 dB (A)
5717-3 20 x 2/1GN 1748 890 1243 340 < 70 dB (A)
1. Technical data
Model Version Ratedvoltage Control Ratedvoltage Nominalinput Rated Wiring
voltage heatingelements heatingelements output diagramNr.
5711-3 VI 3N AC 400V 50Hz 230V 230V 9 000W 9 300W 883 606-3
5711-3 VII 3N AC 400V 50Hz 230V 230V 9 000W 9 300W 884 607-3
5711-3 VIII, X 3N AC 400V 50Hz 230V 230V 9 000W 9 300W 884 608-3
5712-3 VI 3N AC 400V 50Hz 230V 230V 17 000W 17 300W 883 622-3
5712-3 VII 3N AC 400V 50Hz 230V 230V 17 000W 17 300W 883 619-3
5712-3 VIII, X 3N AC 400V 50Hz 230V 230V 17 000W 17 300W 883 620-3
5714-3 VI 3N AC 400V 50Hz 230V 230V 34 000W 34 500W 883 622-3
5714-3 VII 3N AC 400V 50Hz 230V 230V 34 000W 34 500W 883 619-3
5714-3 VIII, X 3N AC 400V 50Hz 230V 230V 34 000W 34 500W 883 620-3
5717-3 VI 3N AC 400V 50Hz 230V 400V 48 000W 48 900W 883 615-3
5717-3 VII 3N AC 400V 50Hz 230V 400V 48 000W 48 900W 884 609-3
5717-3 VIII, X 3N AC 400V 50Hz 230V 400V 48 000W 48 900W 884 617-3

3
I-450-BE
5717 - 3
5714 - 3
5712 - 3
5711 - 3
Fig. 5 Connections
EZ = Current supply
5 x 2,5mm² PG21 (5711 - 3)
5 x 6mm² PG29 (5712 - 3)
5 x 10mm² PG36 (5714 - 3)
2x (5 x 10mm²) 2x PG29 (5717 - 3)
10 = Funnel for descaling agent
ME =Interior cavity venting
SW = Steam release
ø 40 mm (5711 - 5714 - 3)
40 x 80 mm (5717 - 3)
WA1 = Water discharge
R 11/4" (5711 - 3)
WA2 = Water discharge
Rp 3/4" (5711 - 3)
WA = Water discharge
R 11/4" (5712 - 3)
R 11/4" (5714 - 3)
Rp 11/2" (5717 - 3)
WZ1 = Water
R 3/4" (5711 - 5717 - 3)
WZ2 = Softened water
R 3/4" (5711 - 5717 - 3)

I-450-BE
4
INSTALLATION INSTRUCTIONS
INDEX
1. Unit identification 2
2. Installation and connection 4
2.1. Installation 4
2.1.1. Table top models 4
2.1.2. Free-standing floor units 4
2.2. Electrical connection 4
2.2.1. Connection to the power mains 4
2.3. Water connection 4
2.3.1. Indication for units with steam generator
and connection to drinking water 4
2.3.2. Solid substances 5
2.3.3. Dissolved substances 5
2.4. Connection to the drainage system 5
2.4.1. Open connection to the drainage system 5
2.4.2. Fixed connection to the drainage system 5
2.5 Connection to the exhaust gas discharge 5
2.6. General information 6
2.7. Procedure in case of malfunction 6
2.8. Proper handling and maintenance 6
3. Safety recommendations 6
4. Operating instructions 7
Control panel (fig.1 - 4) 7-10
4.1. Operating instructions - versionVI 11
4.2. Operating instructions - version VII 12
4.3. Operating instructions - version VIII 13
4.4. Operating instructions - version X16
5. Cleaning and maintenance 20
2. Installation and connection
2.1. Installation
2.1.1. Table models 5711-3, 5712-3
The following is to be observed:
- An even and level installation room.
- Keep a distance to heat dissipating units.
- No direct steam and heat influence from neighbouring
units.
- Alignment of the unit by means of the height adjust-
able feets, unit must be preheated.
- Fastening with the enclosed foot plates (screw in or
glue).
For installation as a group keep a distance of at least
500 mm between the units.
2.1.2. Free-standing floor units 5714-3, 5717-3
- even and level installation room.
- alignment of the unit by means of the height-adjust-
able feets. Unit must be preheated.
- uniform clearance.
- trolley must be insertable perfectly.
- alignment of the trolley by inserting spacers between
trolley frame and wheel (available also as accessory).
- when installing several free-standing units or in case of
a very irregular floor the mounting of a wheel-guided
roll-in guide is recommended for a perfect exchange
of all trolleys (available also as accessory).
- When positioning the free-standing models against a
wall/niche a distance of at least 500 mm is recom-
mended for installation and service reasons.
2.2. Electrical connection
See page 6: “Connection of the air-o-steam®units to
the power mains”
- Beforeconnectingtheunit check typeofpowersupply
and voltage available with the data plate.
- Connection according to wiring diagram; wiring dia-
gram is to be found inside the unit.
- Connection shall be carried out by authorized person-
nel only.
- Respecttheregulations, localprescriptionsof theelec-
tric power plant.
Take particular care:
- Duringinstallationtheunit mustbe securedsufficiently
and be equipped with a cut-off device (all-pole cut-off
≥3 mm). Connect an equipotential cable - situated
next to the electrical connection - to the equipotential
screw.
- The unit may be used only with the prescribed safety
devices. (Protection category I).
- Use only flexible connection cables - H07 RN-F.
2.2.1. Electric cable connection
To connect the supply cable to the terminal block of the
appliance, proceed as follows:
- Loosen the two screws on the cover of the connection
box to be found on the bottom of the appliance.
- Thebox coverofthe terminalblock swingsopendown-
wards.
- Pass the connection cable through the corresponding
cable grip in the lid.
- Connect the different leads of the cable according to
the wiring diagram and tighten the cable grip.
- Replace the cover and tighten the relative fastening
screws.
2.3. Water connection
- Hose connection 1/2" pressure tight, cap nut 3/4".
- Insert a waste sieve on site. Sieves are installed as
standard equipment before the valve.
- Connection has to be effected to softened cold water.
- Max. mains pressure 10 bar, cold water.
2.3.1. Indication for units with steam generator and
connection to drinking water
- Steam generator is supplied with drinking water.
- Water quality is important for:
• function,
• durability - heating element,
• energy consumption.
- Criteria concerning the water quality are the solid and
the dissolved substances.

I-450-BE 5
2.3.2. Solid substances
Solid substances are e.g. sand or residues from the pip-
ing; to avoid these materials to deposit: insert a filter.
2.3.3. Dissolved substances
Dissolved substances are gases and salts.
Gases
If the gases are nitrogen, oxygen and carbon dioxide it
does not create any problems. If on the contrary the car-
bon dioxide is dissolved in an aggressive form as car-
bonic acid, the following measures (filter, degas) are to
be foreseen to avoid corrosion.
Salts
Salts dissolved in water influence the water quality as
hardeningagentor non-hardeningagent.Hardand/or very
saliferous water will harm the steam generator’s opera-
tion. The relevant standard for the water hardness is the
degree of German hardness (°d). It is classified as fol-
lows:
0 - 7°d - softened water
7 - 14°d - medium hard water
14 - 21°d - hard water
more - 21°d - very hard water
Only softened water (max. 5 - 7°d) ensures a trouble free
operationof the steamgenerator.Ahardness toolow (be-
low 5°d) can provoke corrosion inside the steam genera-
tor and the unit, increased hardness will lead to the calci-
ficationof the heatingelements andto break-down dueto
the resulting heat accumulation, as well as to the calcifi-
cation of the steam generator and the unit. For a trouble-
free operation of the steam generator the following water
quality is recommended:
1. Hardness: 5 - 7° d
2. Chloride: no more than 150 - 250 mg/l
3. Sulphide: no more than 400 mg/l
4. Heavy metals: iron less than 0,10 mg/l
manganese less than 0,05 mg/l
copper only traces
5. Total saline content no more than 400 - 600 mg/l
In case the drinking water does not comply with these
indicative values, it must be adjusted - best directly be-
fore entering the steam generator - to the recommended
values. For harder water the installation of an ion ex-
changer is recommended, which must be regenerated
from time to time with cooking salt. By adding normal
water it is possible to reach the necessary hardness of 5°
d. The usual injection of phosphate to avoid lime deposits
and corrosion inside the piping is harmless if the intro-
duced quantity does not exceed 5 mg P2O5/l (2,5 mg
phosphoric acid anhydride P4O10) according to the rel-
evantdrinking water regulations.In casethis value willbe
exceededconsiderably forwhatever reason, the residues
may have a negative influence on the steam generator
andthe unit.Using not softened water aregular descaling
is absolutely necessary (see more precise explanations
given in the instruction manual). The descaling intervals
depend on the water hardness and the daily operation
hours; therefore it is not possible to provide precise indi-
cations.
Conversion to other degrees of water hardness:
1°d = 0,1783 mmol/l
= 1,79°F (France)
= 1,25°e (Great-Britain)
= 17,9 ppm (USA)
2.4. Connection to the drainage system
Observe the prescriptions of the national standards.
2.4.1. Open connection to the drainage system
The connection of the drainage pipe is foreseen at the
centre of the unit. The following is to be observed:
• Temperature resistant hose/pipe.
• Install with a constant direct slope (approx. 3%) with-
out any buckles.
• The waste water outlet must be outside the position-
ing surface of the unit (respect a distance of at least 1
m away from the unit. Formation of waste air/steam!).
• The waste water outlet must be approx. 30 mm above
the water level of a syphon drain or trough.
• Neverreducethe diameterofthe dischargepipe.Main-
tain the diameter of the connection sleeve.
• In case the unit is installed as part of a group, each
unit must be connected to a separate drain pipe into
an open funnel or syphon drain.
2.4.2. Fixed connection to the drainage system
• Waste water connection sleeve of unit:
R 11/4" and R 3/4" (5711 - 3)
R 11/4" (5712/14 - 3)
Rp 11/2" (5717 - 3)
• Waste water piping preferably as rigid pipe
• Install with a constant slope (approx. 3%)
• Installation of a rigid pipe:
- Sleeve joint nipple:
R 11/4" - 34 mm (5711/12/14 - 3)
additional Rp 11/2" - R 11/4" (5717 - 3)
- Rigid PE-pipe 34 x 2
Important !In case of a fixed connection to the drainage
system it is absolutely necessary to install a venting pipe
between unit and syphon drain. If this venting pipe is not
part of the unit it is available as accessory to be ordered
separately.
2.5. Connection to the exhaust gas discharge
- The installation underneath an extraction hood is rec-
ommended.
- A waste air quenching system is installed inside the
unit as standard equipment. It is controlled by means
of a thermostat, this means it is activated and deacti-
vated automatically.
- This system prevents the escape of vapours and the
water consumption is reduced to a minimum.
- In the version VII,VIII and Xthe waste air quenching
system can be activated or deactivated. Installing the
appliance under a steam extraction hood, saves on
water.
- It is forbidden to connect the pipe of the waste air
quenchingsystemdirectlyto thatoftheextractionhood.

I-450-BE
6
2.6. General information
- Do not block the vapour escape.
- Do not block or cover the safety device (steam re-
lease safety valve).
- The units are designed for unattended operation.
2.7. Procedure in case of malfunction
In case of malfunction disconnect the unit immediately
and call for the after-sales-service.Any servicing or repa-
ration of malfunction is to be carried out by authorized
qualified technicians only.
2.8. Proper handling and maintenance
Only in case of proper handling according to the regula-
tionsof this installation instructions, theoperating instruc-
tions (manual) and the indications concerning cleaning
and care as well as a regular maintenance by an author-
ized technician we will be able to guarantee perfect op-
eration and operation safety according to our sales and
delivery terms.
Thisis equally validfor the regulationsof the lawsin force
concerning unit safety and the prevention of accidents.
Thereforewerecommend thestipulationof amaintenance
contract. Only use original spare parts !
To maintain theoperational valueof yourunit and toavoid
malfunctions we recommend a regular maintenance ac-
cordingto the check-list.Theauthorized after-sales-serv-
icetrained forthis kindof applianceguarantees maximum
service for your unit.
Regular maintenance (see checklist) obviously depends
on the frequency of operation; the recommended inter-
vals are:
Operation:
up to 2 hours a day maintenance every 12 months
between 2 to 6 hours a day maintenance every 6 months
more than 6 hours a day maintenance every 4 months
3. Safety recommendations
Before operating the appliance, it must be installed ac-
cording to the assembly instructions and connected by
an authorised technician.
The appliance should not be switched on until the user
has been instructed on how to operate it.
The appliance may only be used by trained personnel. It
has been officially approved for cooking food in commer-
cialkitchens andfoodprocessing businessesonly. Closed
containers such as tins, jars, bottles, tubes, etc. may not
be heated in the appliance as they could explode with the
consequent risk of injuring persons or damaging the ap-
pliance. When using the appliance in the Steam, Steam 1
orSteam 2/Regenerate modes, thedoor should firstof all
be opened to the waiting position. Only after the steam
has escaped through the slits created around the door,
may the latter be fully opened. When working with this
appliance, hygiene standards (HACC) must be strictly
observed. When preparing food to be cooked at a low
temperature, for example, a stage lasting 10 - 15 minutes
with a cooking temperature of ≥150°C must be inserted,
observing the process carefully. In this way any bacteria
on the surface of the food to be cooked will be destroyed.
During preparation of foods to be cooked, it should also
be checked that utensils are absolutely clean, in order to
avoid any contamination inside the actual food.
Shouldthese instructions notbe respected, the manufac-
turer cannot guarantee that the food will be cooked per-
fectly from a hygienic and sanitary point of view. No ob-
jects such as GN containers, pans, cloths, etc. should be
placed on the appliance when it is in use. When in opera-
tion, avoid touching glass or metal surfaces as there is
the risk of injury due to the high cooking temperatures.
The appliance must not be cleaned with any high-pres-
surecleaning device (seefurther instructions underpara-
graph ”Cleaning and care”). To clean the cooking cham-
ber and stainless steel parts, only use a special cleaning
agent recommended for this type of appliance (see fur-
ther instructions under paragraph ”Cleaning and care”).
To remove any scale from the steam generator, only use
a descaling product specially developed for this purpose
(see further instructions under paragraph ”Cleaning and
care”). In the event of malfunctioning or failure, switch off
the appliance. If the self-diagnosis on the electric con-
trols does not identify the fault or if the panel or covering
elements would have to be removed in order to be able to
eliminate the trouble, contact the nearest service centre.
The appliance must not be switched on again until the
fault has been mended. Some faults or malfunctioning
may also be caused by faults in the electricity supply or
by impurities in the water supply or drainage system.The
manufacturer of the appliance cannot be held liable for
this type of fault. The user should also have these points
checked regularly by an authorised service centre.
To guarantee that the appliance is in proper working or-
der, periodic maintenance and checks by an authorised
technician are necessary. Such technicians must be
trained by the manufacturer and observe the laws and
standardsin forcein connectionwith theirwork. Itis there-
fore advisable to take out a maintenance contract. Parts
and components must not be replaced with other than
original spare parts. In compliance with our terms of sale
and delivery, perfect and safe operation of the appliance
is only guaranteed if it has been handled and used cor-
rectly, operated according to the operating instructions,
looked after, cleaned and regularly overhauled by techni-
cal personnel or by the service centre.

I-450-BE 7
4. Operating instructions
Fig. 1
VersionVI
1 ON/OFF switch
11 Hot air
12 Steam
13 Steam 1
14 Steam 2/regeneration
17 Programming the temperature of the cooking
chamber
18 Programming the duration of the cooking cycle
28 Warning of scale build-up in the steam generator
29 Door safety
30 Steam generator level gauge
31 Low temperature steam

I-450-BE
8
Fig. 2
VersionVII
1 ON/OFF switch
11 Hot air
12 Steam
13 Steam 1
14 Steam 2/regeneration
17 Programmingthe temperatureinside the cooking
chamber
18 Programming the duration of the cooking cycle
19 Programming the core temperature
25 Waste steam quenching system
26 Manual humidification
28 Warning of scale build-up inside the steam
generator
29 Door safety
30 Steam generator level gauge
31 Low temperature steam
32 Fan speed selection switch

I-450-BE 9
Fig. 3
VersionVIII
1 ON/OFF switch
3 Start/Stop
5 Cook Step
6 Fan speed selection
7 Cook & Hold
8 Intermittant fan operation
9 ECO-Delta Cooking
10 Programming the starting time of the cooking
cycle
11 Hot air
12 Steam
13 Steam 1
14 Steam 2/regeneration
17 Programming the temperature inside the
cooking chamber
18 Programming the duration of the cooking cycle
19 Programming the core temperature
23 Steam generator discharge
24 Clean programme
25 Waste steam quenching system
26 Manual humidification
27 Steam release valve of the cooking chamber
28 Warning of scale build-up inside the steam
generator
29 Door safety
30 Steam generator level gauge

I-450-BE
10
Version X
1 ON/OFF switch
2 Mode “PROG/AUTO”
3 Start/Stop
4 Programme selection
5 Cook Step
6 Fan speed selector
7 Cook & Hold
8 Intermittent fan operation
9 ECO-Delta Cooking
10 Programming the starting time of the cooking
cycle
11 Hot air
12 Steam
13 Steam 1
14 Steam 2/regeneration
15 Indication of the actual temperature value
16 Regulation of the moisture degree
17 Programming the temperature inside the
cooking chamber
18 Programming the duration of the cooking cycle
19 Programming the core temperature
20 CLEAR ENTRY
21 MEMORY
22 PROGRAM
23 Emptying the steam generator
24 Clean programme
25 Waste steam quenching system
26 Manual humidification
27 Steam release valve of the cooking chamber
28 Warning of scale build-up in the steam generator
29 Door safety
30 Steam generator level gauge
Fig. 4

I-450-BE 11
4.1. Control panel - version VI
MAIN SWITCH (Fig.1 No.1)
Themain switchissituated onthe upperpartof thecontrol
panel and is used to switch the appliance on or off. When
the marking of the knob points to "0" the appliance is
switched off. When selecting the cooking programmes
mentioned below the appliance is switched on
automatically. The indicator light above the switch lights
up.Toswitchoff the appliance simply turnthe mainswitch
back to position ”0”. The indicator light goes out.
The five cooking programmes are activated by means of
a programme selection switch.
HOT AIR (Fig.1 No.11)
In this position only the heating of the cooking chamber is
activated, which means just hot-air operation.
STEAM (Fig.1 No.12)
Inthis positiononly thesteam generatorheating elements
areactivated, whichmeans just steamoperation (100°C).
STEAM 1 (Fig.1 No.13)
In this position the heating of the cooking chamber is
activatedas well asthe steamgeneratorheating elements
in the proportion of 75% hot air and 25% steam.
STEAM 2 - REGENERATION (Fig.1 No.14)
In this position the heating of the cooking chamber is
activatedas well asthe steamgeneratorheating elements
in the proportion of 50% hot air and 50% steam.
Low temperature steam, vacuum-cooking
(Fig.1 No.31)
Inthis positiononly thesteam generatorheating elements
are activated, which means just steam operation
(temperature range between 30°C and 99 °C).
COOKING CHAMBER TEMPERATURE
(Fig.1 No.17)
Setting of the required temperature inside the cooking
chamber.The temperaturemay beset anywherebetween
50° and 300° C. The markings on the knob allow the
approximate regulation of the temperature value, while
the luminous digital indication (display) above the knob
allows a precise regulation. During the process of
programming the temperature value is blinking. If no furt-
her change is made, after 3 seconds the display will
indicate the temperature value actually measured by the
temperature sensor inside the cooking chamber, thus
enablingaconstantcontrolof theactualtemperatureinside
the cooking chamber.
In the "HOT AIR" cooking mode, the programmable
maximum temperature is 300° C. In this case the
temperature range between 250° and 300°C is limited to
10 minutes. In the ”STEAM” cooking mode, the
temperature is automatically limited to 100 °C. In the
”STEAM 1" and ”STEAM 2” cooking modes, the
programmable maximum temperature is 250° C. In the
”LOW-TEMPERATURE STEAM" cooking mode, the
programmable temperature goes from 30° to 99° C.
ACTUAL COOKING TIME (Fig.1 No.18)
Programming the desired cooking time.The time scale is
divided into three different graduations :
Range from 1 - 20 min.: This enlarged range in 1-minute
stages is provided for short term cooking.
Range from 20 - 120 min.:Thisrangein 4-minutestages
is provided for long term cooking.
Range ¥: This sign of infinity indicates continuous
operation. In this position the appliance is preheated or is
working in the “stand-by” operation.
Byturning theknob, thetimer is activated and thecooking
process starts, if the desired cooking programme and
temperaturehasbeenpreset. During thecourseofcooking
process the green indicator light above the knob lights
up.As soon as the cooking time is over, the indicator light
goes out and an audible signal is activated.
Three circular indicator lights, placed in the lower part of
the control panel, are indicating the following control
functions.
WARNING OF SCALE BUILD-UP IN THE
STEAM GENERATOR (Fig.1 No.28)
When the indicator light relating to the symbol comes on,
this means that there is a build-up of scale in the steam
generatorand on the heating elements.Descaling should
becarried outas quicklyas possible.Detailed instructions
for the chemical descaling of the entire system are given
in the chapter ”Cleaning and care”.
DOOR SAFETY (Fig.1 No.29)
If the indicator light relating to this symbol comes on, the
doorisnot closedproperlyand consequentlythe”STEAM”
and ”STEAM 1” cooking modes cannot be activated.
STEAM GENERATOR LEVEL GAUGE
(Fig.1 No.30)
The indicator light relating to the steam generator symbol
blinks whenever the water in the steam generator does
not cover the safety level mark.
If the indicator light up continously, this means that the
steam generator is still being filled with water, the heating
elements,however, canbeactivated.Thesteamgenerator
is ready for use.
When the indicator light goes out, this means that the
waterlevel insidethe steamgenerator iscorrect and there
is no need to top up.

12 I-450-BE
4.2. Control panel - version VII
MAINSWITCH (Fig.2No.1)
Themain switchissituated onthe upperpartof thecontrol
panel and is used to switch the appliance on or off. When
the marking of the knob points to “0” the appliance is
switched off. When selecting the cooking programmes
mentionedbelowtheapplianceisswitchedonautomatically.
The indicator light above the knob lights up.To switch off
theappliance simply turnthe main switch back toposition
”0”.Theindicatorlight goes out.
Thefive cookingprogrammes are activatedby meansof a
programmeselection switch.
HOTAIR (Fig.2No.11)
In this position only the heating of the cooking chamber is
activated,which means just hotair-operation.
STEAM (Fig.2No.12)
Inthis positiononly thesteam generatorheating elements
areactivated, whichmeans juststeam operation(100 °C).
STEAM 1 (Fig.2No.13)
In this position the heating of the cooking chamber is
activatedas well asthe steamgeneratorheating elements
in the proportion 75% hot air and 25% steam.
STEAM 2 - REGENERATION (Fig.2No.14)
In this position the heating of the cooking chamber is
activatedas well asthe steamgeneratorheating elements
in the proportion 50% hot air and 50% steam.
Lowtemperature steam, vacuum-cooking
(Fig.2No.31)
Inthis positiononly thesteam generatorheating elements
are activated, which means just steam operation
(temperaturerange adjustable between30°C and99°C).
COOKINGCHAMBER TEMPERATURE
(Fig.2No.17)
Setting of the required temperature inside the cooking
chamber.The temperaturemay beset anywherebetween
50° and 300° C. The markings on the knob allow the
approximateregulationof thetemperature value, whilethe
luminousdigital indication(display) above theknob allows
a precise regulation. During the process of programming
the temperature value is blinking. If no further change is
made, after 3 seconds the display will indicate the tempe-
raturevalue actuallymeasured by thetemperature sensor
inside the cooking chamber, thus enabling a constant
control of the actual temperature inside the cooking
chamber.
In the “HOT AIR” cooking mode, the programmable
maximum temperature is 300° C. In this case the
temperature range between 250° and 300°C is limited to
10minutes.Inthe”STEAM”cookingmode,thetemperature
is automatically limited to 100 °C. In the ”STEAM 1" and
”STEAM2” cooking modes,the programmable maximum
temperature is 250° C. In the ”LOW-TEMPERATURE
STEAM” cooking mode, the programmable temperature
goes from 30° to 99° C.
ACTUALCOOKINGTIME (Fig.2No.18)
Programming the desired cooking time.The time scale is
dividedinto three differentgraduations :
Range from 1 - 20 min.: This enlarged range in 1-minute
stages is provided for short term cooking.
Range from 20 - 120 min.:Thisrange in4-minute stages
is provided for long term cooking.
Range ¥: This sign of infinity indicates continuous
operation. In this position the appliance is preheated or is
workingin the“stand-by”operation.
Byturning theknob, thetimer is activated and thecooking
processstarts,if thedesired cooking programmeand tem-
perature has been preset. During the course of cooking
processthe greenindicator light abovethe knoblights up.
As soon as the cooking time is over, the indicator light
goes out and an audible signal is activated.
If the cooking process is carried out by using the core
temperature sensor, the timer must be in the “0” position.
CORETEMPERATURE (Fig.2 No. 19)
In this cooking process the cooking time is determined by
theset coretemperature.For thisoperation itisnecessary
to set the timer to the “0” position.
Byturning theknob tothe rightthe requiredcore tempera-
ture can be increased up to 99°C maximum.
Byturning theknob tothe left, the temperature islowered,
witha programmable temperature value of0°C minimum.
During the programming stage the set temperature value
is blinking on the display above the knob. If no further
change is made, after 3 seconds the display will indicate
thetemperature valueactually measuredby thecore tem-
perature sensor, thus enabling a constant control of the
roast during the entire cooking process.
REDUCEDFAN SPEED (Fig.2No.32)
When pressing this button the indicator light above the
symbollights up. Ifthe appliance has not yetbeen started
and therefore the fan is not yet in operation, the fan motor
will automatically operate at reduced speed after starting
the cooking process. If on the contrary the fan motor has
been started at high speed, it will be interrupted shortly
(approximately 15 seconds), after which the motor
automatically starts at reduced speed.
Tooperatethe appliancewith normalfanspeed, justpress
thisbuttonagain.Theindicator lightgoesoutand the motor
automaticallychanges to normalspeed.
Note: when the fan reduced speed is enabled, the hot air power
gets automatically reduced to 50% :
EMPTYING THE STEAM GENERATOR
(Fig.2 No.23)
The appliance is fitted with a motor-operated discharge valve.
Under normal conditions it is closed and this is shown by

I-450-BE 13
the indicator light above the symbol going out.
Upon pressing the button the valve opens so that the water
inside the steam generator can drain off. This operation is
shown by the relative indicator light coming on. Once the
boiler has been drained the button must be pressed again
to close the valve.
WASTESTEAMQUENCHINGSYSTEM
(Fig.2No.25)
This button can be used to activate or deactivate the
thermostatic waste steam quenching system in all the
cookingmodes.Iftheair-o-steam®isplacedunderasteam
extraction hood, the steam need not be condensed by
spraying cold water into the waste tube. This saves on
water.Upon pressingthisbutton, therelative indicator light
above the symbol starts blinking, showing that the steam
condensation device is deactivated.
Bypressing thebutton again,the system is re-activated in
normalconditionand dependingonwhether waterisbeing
injectedor not,the relativeindicator lightsup constantly or
goes out.
MANUAL HUMIDIFICATION (Fig.2No.26)
Thisbuttonmaybe used toincreasethedegree of humidity
insidethecookingchamberbyintroducingwater.Thewater
input time is limited to about 5 seconds.
The relative indicator light is on during water input. The
degreeof humidityin the cookingchamber maybe altered
to individual requirements by pressing this button several
times.
Three circular indicator lights, placed in the lower part of
the control panel, are indicating the following control
functions.
WARNING OF SCALE BUILD-UP IN THE
STEAMGENERATOR (Fig.2No.28)
When the indicator light relating to the symbol comes on,
this means that there is a build-up of scale in the steam
generatorand on the heating elements.Descaling should
be carried out as quickly as possible.
Detailed instructions for chemical descaling of the entire
system are given in the chapter ”Cleaning and care”.
DOORSAFETY (Fig.2No.29)
If the indicator light relating to this symbol comes on, the
doorisnot closedproperlyand consequentlythe”STEAM”
and ”STEAM 1” cooking modes cannot be activated.
STEAMGENERATOR LEVELGAUGE
(Fig.2No.30)
The indicator light relating to the steam generator symbol
blinkswheneverthe waterin the steamgenerator doesnot
cover the safety level mark.
If the indicator lights up continously, this means that the
steam generator is still being filled with water, the heating
elements,however, canbeactivated.Thesteamgenerator
is ready for use. When the indicator light goes out, this
means that the water level inside the steam generator is
correct and there is no need to top up.
4.3. Control panel - versionVIII
ON/OFFSWITCH (Fig.3No.1)
The ON/OFF switch is used to switch the appliance and
controlson or off.To switch theappliance on,lightly press
the button; to switch off keep the button pressed down for
about 3 seconds. This time delay avoids accidental
switching off during a cooking cycle.
When the appliance is switched off, this is indicated by
thegreen indicatorlight abovethe buttongoing out.When
the appliance is switched on it lights up.
Note: upon switching off the appliance, wait at least 5
secondsbefore switching on again.
COOK-STEP (Fig.3No.5)
With this COOK-STEP storage, it is possible to divide a
cookingcycle into twodifferent sequences: e.g.browning
and finishing the cooking of the roast. The two COOK-
STEPS are indicated by the two-coloured indicator lights.
The lighting up of a red indicator light indicates, that the
relevant COOK-STEP is just being programmed or that it
isalready working.Theother STEPwhichactually isnot in
operation is shown by a green indicator light.
The first COOK-STEP is always activated automatically
in the neutral position of the control, which is indicated by
the lighting up of the left indicator light in red and the right
indicator light, symbolizing the second cooking stage, in
green. As soon as the first COOK-STEP is memorized
(e.g.cookingchamber temperatureinthehot airmodeand
acertain timefor the initialroasting stage),it ispossible to
activatethe secondstage bypressing thebutton andthen
proceed with a new programming (e.g. cooking chamber
temperaturein acombination modeand a certain cooking
time for the final roasting) .
START
STOP
START/STOP (Fig.3No.3)
After having selected all data necessary for the cooking
process,suchastemperature,cooking time,cookingmode
and fan speed, the cooking process may be started using
the”START/STOP”button.Therelativeyellowindicatorlight
comes on.
Thecookingcyclemaybeinterruptedbypressingthebutton
for more than 3 seconds.
HOTAIR (Fig.3No.11)
In this position only the heating of the cooking chamber is
activated,which means just hot-airoperation.
STEAM (Fig.3No.12)
Inthis positiononly thesteam generatorheating elements
are activated, which means steam operation between
30- 100°C.

14 I-450-BE
STEAM 1 (Fig.3 No.13)
In this position the heating of the cooking chamber is
activated as well as the steam generator heating elements
in the proportion of 75% hot air and 25% steam.
STEAM 2 - REGENERATION (Fig.3 No.14)
In this position the heating of the cooking chamber is
activated as well as the steam generator heating elements
in the proportion of 50% hot air and 50% steam.
COOK AND HOLD (Fig.3 No.7)
This patented low temperature cooking programme is
recommended for ”Hot-air and Steam” cooking modes. Upon
pressing the ”COOK & HOLD” button, the relative indicator
lights above these buttons start blinking.
If the desired cooking programme is chosen by pressing
the ”HOT AIR” or ”STEAM” button, a fixed programme is
set with the following sequence:
1.The heating power (hot air or steam) is reduced to 50%. 2.In
the same way, the fan rotation speed is also reduced.
In addition, the fan works intermittently after the regulated
temperature in the cooking chamber has been reached (low
temperature range). If this programme is activated, the
relative indicator light comes on. The cooking process is
switched off automatically once the set time has elapsed.
ECO-DELTA COOKING (Fig.3 No.9)
For this cooking process, a temperature value between
0°C and 99°C may be selected by which the cooking
chamber temperature will be above the product’s core
temperature.
Upon activating this programme, the indicator light above
the button comes on.
POWER STAGE SELECTION (Fig.3 No.6)
POWER STAGE 1
High fan speed - 100% heating power.
In neutral conditions, i.e. when the electrical circuit is
activated, the two indicator lights are off.
POWER STAGE 2
Reduced fan speed - 100% heating power.
By pressing the button once, the indicator light above the
fan symbol comes on.
POWER STAGE 3
High fan speed - 50% heating power.
By pressing the button a second time, the indicator light
above the coil symbol comes on.
POWER STAGE 4
Reduced fan speed - 50% heating power.
By pressing the button a third time, the two indicator lights
(fan and coil) come on.
Upon pressing the button again, the two indicator lights go
off and the control circuit goes back to its initial position,
i.e. in the power stage 1 position.
INTERMITTENT FAN OPERATION (Fig.3 No.8)
Intermittent fan operation is obtained in this position, i.e.
the fan starts and stops at programmed intervals. This
intermittent control is activated when the regulator stops
the heating of the cooking chamber; i.e. when the set
temperature inside the cooking chamber is reached. This
intermittent control does not depend on the programmed
fan speed. During the heating stage, the fan control is not
activated. When working with this version, the indicator
light above the button comes on.
PROGRAMMING COOKING STARTTIMES
(Fig.3 No.10)
With this function it is possible to memorize a specific
time; the appliance automatically comes on and starts the
set cooking process once the time set by means of this
button has elapsed.While this programme is in operation,
the indicator light above the button remains on.
After having programmed the cooking time, you have
to set the cooking proces you intend to use as in 2nd
Cook Step.
COOKING CHAMBERTEMPERATURE
(Fig.3 No.17)
Programming the desired temperature inside the cooking
chamber.The temperature may be set anywhere between
30°C and 300°C with hot air, using the knob.The temperature
range between 250°C and 300°C is limited to a time of 10
minutes. This enlarged temperature range ensures fast
preheating of the empty appliance or a high stand-by
temperature ready for loading the food. During the
programming stage the set temperature appears on the
display above the knob. If this value is not changed, the
appliance automatically changes to visualize the actually
measured cooking chamber temperature.
ACTUAL COOKINGTIME (Fig.3 No.18)
Programming the desired cooking time. A cooking time of
anywhere between 1 minute and 8 hours may be set by
using the relative knob. During the programming stage the
set cooking time appears on the display above the knob.
Upon activating the cooking process the count-down runs
minute by minute and the remaining cooking time appears
on the display. Continuous operation is activated by
exceeding the setting of 8 hours; ”CONT” appears on the
display.
Note: selecting a cooking programme which stops the
cooking process when the set core temperature is reached,
excludes the possibility of programming a cooking time.
CORETEMPERATURE (Fig.3 No.19)
With this procedure the cooking time depends on the set
core temperature of the roast. In fact, apart from the core
temperature, the only parameter to be set is the cooking
chamber temperature.The required temperature may be set
anywhere between 0°C and 99°C by means of the knob. During
the programming stage the set core temperature is indicated
on the display above the knob. If this value is not changed,
the appliance automatically changes to visualize the actually
measured coretemperature.

I-450-BE 15
SPECIAL FUNCTIONS
EMPTYING THE STEAM GENERATOR
(Fig.3No.23)
The appliance is fitted with a motor-operated discharge
valve.Undernormalconditionsitisclosedandthisisshown
by the indicator light above the symbol going out.
Uponpressingthe buttonthevalveopens sothatthe water
insidethe steam generator can drainoff.This operation is
shown by the relative indicator light coming on. Once the
boilerhas beendrained thebutton must be pressed again
to close the valve.
CLEAN (Fig.3No.24)
The ”CLEAN” programme is a cleaning, not a cooking
programme.It shouldbeactivated regularlyat theendof a
working day with the air-o-steam®in order to clean the
appliance.
To activate this programme, press the button for about 3
seconds,afterwhichtherelativeindicatorlightstopsblinking
and remains on. The steam generator starts heating and
thecookingchamberishumidified.Aftertheaudiblewarning
signal,a detergent has to besprayed onto the walls ofthe
cookingchamber includingthe airbaffle sheets.Close the
doorand pressthe ”CLEAN”button again.The countdown
ofthe action time for thedetergent, i.e. 10 minutes, starts.
Afterthis, restartthe steamgenerator andlet itoperate for
another20minutes,during which alldepositsareremoved.
The indicator light comes on during the second stage. An
acoustic signal is activated at the end of the programme.
WASTESTEAMQUENCHINGSYSTEM
(Fig.3No.25)
This button can be used to activate or deactivate the
thermostatic waste steam quenching system in all the
cookingmodes.
Iftheair-o-steam®is placed under a steamextractionhood,
the steam need not be condensed by spraying cold water
into the waste tube. This saves on water. Upon pressing
this button, the relative indicator light above the symbol
startsblinking,showingthatthesteamcondensationdevice
is deactivated.
Bypressing thebutton again,the system is re-activated in
normalconditionand thewaterinput controlgovernedby a
thermostat allows the vapours to be condensed.
After water input, the relative indicator light comes on.
MANUAL HUMIDIFICATION (Fig.3No.26)
Thisbuttonmaybe used toincreasethedegree of humidity
insidethecookingchamberbyintroducing water.Thewater
inputtimeislimitedtoabout5seconds.Therelative indicator
lightis onduring waterinput.The degreeof humidityin the
cookingchambermaybealteredto individualrequirements
by pressing this button several times.
COOKINGCHAMBER STEAM RELEASE
VALVE (Fig.3No.27)
The steam release valve usually fitted in this version is
motor-operated.It opensautomaticallyby pressingon this
button.During the openingstage therelativeindicator light
above the button blinks. Upon completion of opening, the
indicator light stops blinking and remains fixed. To close,
just press the button again.
Duringtheclosing stage,theindicatorlight blinksandgoes
out when the valve is fully closed.
Three circular indicator lights, placed in the lower part of
the control panel, are indicating the following control
functions.
WARNING OF SCALE BUILD-UPIN THE
STEAMGENERATOR (Fig.3No.28)
When the indicator light relating to the symbol comes on,
this means that there is a build-up of scale in the steam
generatorand on the heating elements.Descaling should
becarried outas quicklyas possible.Detailed instructions
for chemical descaling of the entire system are given in
thechapter ”Cleaning andcare”.
DOORSAFETY (Fig.3No.29)
If the indicator light relating to this symbol comes on, the
doorisnot closedproperlyand consequentlythe”STEAM”
and ”STEAM 1” cooking modes cannot be activated.
STEAM GENERATOR LEVEL GAUGE
(Fig.3No.30)
The indicator light relating to the steam generator symbol
blinkswheneverthe waterin the steamgenerator doesnot
cover the safety level mark.
If the indicator lights up continously, this means that the
steam generator is still being filled with water, the heating
elements,however, canbeactivated.Thesteamgenerator
is ready for use. When the indicator light goes out, this
means that the water level inside the steam generator is
correct and there is no need to top up.

16 I-450-BE
COOK-STEP (Fig.4No.5)
With this COOK-STEP storage, a cooking of cycle
consisting of six different sequences may be set: e.g.
browning,cooking andkeeping thefood warm.
Programmingthesequences isdescribedunder”Storage
ofcooking programmes”.
Therelative indicatorlightshave twocolours showingthe
COOK-STEP of the cooking process and the number of
programmedCOOK-STEPS.
Ifthered indicatorlightis on,theCOOK-STEP isworking.
All the other programmed sequences which are not in
operationare shownby green indicatorlights.
Indicatorlightswhicharenoton,correspond to theunused
COOK-STEPS.
Changingfrom onesequenceto anotheris indicatedbya
buzzer.
POWER STAGE SELECTION (Fig.4No.6)
POWER STAGE 1
Highfan speed- 100%heating power.
In neutral conditions, i.e. when the electrical circuit is
activated, the two indicator lights are off.
POWER STAGE 2
Reducedfan speed- 100%heating power.
Bypressing thebutton once,the indicatorlight abovethe
fan symbol comes on.
POWER STAGE 3
Highfan speed- 50% heatingpower.
By pressing the button a second time, the indicator light
above the coil symbol comes on.
POWER STAGE 4
Reducedfan speed- 50%heating power.
Bypressingthe buttonathird time,thetwo indicatorlights
(fan and coil) come on.
Upon pressing the button again, the two indicator lights
gooffandthecontrol circuitgoesbacktoitsinitial position,
i.e. in the power 1 position.
COOKANDHOLD (Fig.4No.7)
Thislowtemperaturecookingprogrammeisrecommended
for”Hot-air”and “Steam”programmes.Uponpressing the
”COOK&HOLD”button,therelative indicatorlights above
the button start blinking.
If a programme is chosen by pressing the ”HOTAIR” or
”STEAM” button, a fixed programme is set with the
followingsequence:
1.Theheating power(hotair or steam)is reduced by50%.
2.In the same way, the fan speed is also reduced.
Inaddition,the fanworks intermittently afterthe regulated
temperature in the cooking chamber has been reached
(lowtemperaturerange).
If this programme is activated, the indicator light related
to this button comes on. The cycle stops when the set
time has elapsed.
4.4 Control panel - versionX
ON/OFFSWITCH (Fig.4No.1)
The ON/OFF switch is used to switch the appliance and
controlson oroff.Toswitchthe applianceon, lightlypress
thebutton; toswitch offkeep thebutton pressed down for
about 3 seconds. This time delay avoids accidental
switching off during a cooking cycle.
When the appliance is switched off, this is indicated by
thegreenindicator light abovethebutton goingout.When
the appliance is switched on it lights up.
Note: upon switching off the appliance, wait at least 5
secondsbefore switching on again.
PROG/AUTO (Fig.4No.2)
The ”PROG/AUTO” button can be used to set automatic
operation with all stored data or operation in the
programming mode. After having switched on the
appliance, the indicator lights to the side of the button
start blinking.
Pressingthe touchpad once setsthe ”PROG”mode; the
relativeindicator lightstops blinking andremains on.The
indicator light corresponding to the ”AUTO” mode goes
out.Tochangetothe”AUTO”mode,pressthebuttonagain.
Thechangeis shownbythe relativeindicatorlight coming
on.
Note: Itis only possibleto change tothe ”AUTO” mode if
a cooking programme has been stored. Operation in the
”AUTO”modeis shown bythe relativeindicator lightabove
thebutton coming on.
START
STOP
START/STOP (Fig.4No.3)
After having selected all data necessary for the cooking
process,suchastemperature,cookingtime,cookingmode
andfan speed,thecooking processmay bestartedusing
the ”START/STOP” button. The relative yellow indicator
light comes on.
This cooking cycle may be interrupted by pressing the
buttonduring operation for more than3 seconds.
COOKINGPROGRAMMES (Fig.4No.4)
Ifthe cookingprogrammes have beenstored (forstorage
see paragraph ”Storage of cooking programmes”), they
maybeselectedusingtheincreaseand decrease buttons.
99 cooking programmes may be stored with a maximum
of6”COOK-STEPS”,i.e.sub-programmes.If oneof these
programmes is temporarily changed (e.g. the values
regarding temperature or cooking times), the selected
programmenumber willblink. Ifthe change is not stored,
it will be erased when the appliance is switched off. To
returnto theoriginal programme,just pressthe button for
3 seconds.

I-450-BE 17
INTERMITTENT FAN OPERATION (Fig.4 No.8)
Intermittent fan operation is obtained in this position, i.e.
the fan starts and stops at programmed intervals.
This intermittent control is activated when the regulator
stops the heating of the coo ing chamber; i.e. when the
set temperature is reached. This control does not depend
on the programmed fan speed.
During the preheating stage, it is not activated. When
inserting this variant, the indicator light above the button
comes on.
ECO-DELTA COOKING (Fig.4 No.9)
For this coo ing process, a temperature value anywhere
between 0°C and 99°C may be selected by which the
coo ing chamber temperature will be above the product
core temperature.
Upon activating this programme, the indicator light above
the button comes on.
PROGRAMMING COOKING START TIME
(Fig.4 No.10)
The appliance automatically comes on and starts the
coo ing process once the time set by means of this button
has elapsed.
While this programme is in operation, the indicator light
above the button remains on.
After having pr grammed the c king time, y u have
t set the c king pr ces y u intend t use as in 2nd
C k Step.
HOT AIR (Fig.4 No.11)
In this position only the heating of the coo ing chamber
is activated, which means just hot-air operation.
STEAM (Fig.4 No.12)
In this position only the steam generator heating elements
are activated, which means steam operation between 30
- 100°C.
STEAM 1 (Fig.4 No.13)
In this position the heating of the coo ing chamber is
activated as well as the steam generator heating elements
in the proportion of 75% hot air and 25% steam.
STEAM 2 - REGENERATION (Fig.4 No.14)
In this position the heating of the coo ing chamber is
activated as well as the steam generator heating elements
in the proportion of 50% hot air and 50% steam.
SET POINT (Fig.4 No.15)
During a coo ing process, the actual temperature and time
values, i.e. the measured values, are shown on the
respective displays.
If the user wishes to now which temperatures and coo ing
times have been set, the SET POINT button must be
pressed. The displays will show the set values, i.e. the
values which should be reached. The indicator light of this
button comes on. The real value, i.e. the value read inside
the coo ing chamber will be automatically displayed about
5 seconds after having released the button.
HUMIDITY REGULATION (Fig.4 No.16)
Humidity regulation operates in the following coo ing
programme:
STEAM 2 - Regeneration
This regulation is used to change and consequently to
establish individually the degree of humidity of the coo ing
mode within a certain range.
It is also possible to store the humidity level required in
the corresponding coo ing programmes.
Pressing the increase and decrease buttons sets the
required humidity in the coo ing chamber, which may be
regulated by levels.
COOKING CHAMBER TEMPERATURE
(Fig.4 No.17)
The temperature may be set anywhere between 30°C and
300°C with hot air, using the increase and decrease buttons.
The temperature range between 250°C and 300°C is limited
to a time of 10 minutes.
This wide temperature range ensures fast preheating of
the empty appliance or a high stand-by temperature ready
for loading the food. In the Steam 1 and Steam 2 coo ing
modes, the programmable temperature goes from 30°C to
250°C. In the Steam coo ing mode, the temperature is
automatically limited to 100°C.
ACTUAL COOKING TIME (Fig.4 No.18)
A coo ing time of anywhere between 1 minute and 8 hours
as well as continuous operation may be set by means of
the increase and decrease buttons.
During the programming stage the set coo ing time appears
on the display above the increase and decrease buttons.
Continuous operation is activated by setting a time which
exceeds 8 hours or by directly pressing the decrease button
in the neutral position. CONT appears on the display.
N te: selecting a coo ing process which stops when the
set core temperature is reached, excludes the possibility
of programming a coo ing time.
CORE TEMPERATURE (Fig.4 No.19)
The required temperature may be set anywhere between
0°C and 99°C by means of the increase and decrease
buttons. With this procedure the coo ing time depends on
the set core temperature of the roast.
In fact, apart from the core temperature, the only parameter
to be set is the coo ing chamber temperature. It is
impossible to set the time.

18 I-450-BE
COOKINGCHAMBER STEAM RELEASE
VALVE (Fig.4No.27)
The steam release valve usually fitted in this version is
motor-operated.It opensautomaticallyby pressingon this
button.
Duringthe openingstage therelative indicator light above
thebuttonblinks.Uponcompletionof opening,the indicator
light stops blinking and remains on. To close, just press
the button again. During the closing stage, the indicator
light blinks and goes out when the valve is fully closed.
Three circular indicator lights, placed in the lower part of
the control panel, are indicating the following control
functions.
WARNING OF SCALE BUILD-UP IN THE
STEAMGENERATOR (Fig.4No.28)
When the indicator light relating to the symbol comes on,
this means that there is a build-up of scale in the steam
generatorand on the heating elements.Descaling should
becarried outas quicklyas possible.Detailed instructions
for chemical descaling of the system are given in the
chapter”Cleaningand care”.
DOORSAFETY (Fig.4No.29)
If the indicator light relating to this symbol comes on, the
doorisnot closedproperlyand consequentlythe”STEAM”
and ”STEAM 1” cooking modes cannot be activated.
STEAMGENERATOR LEVELGAUGE
(Fig.4No.30)
The indicator light relating to the steam generator symbol
blinkswheneverthe waterin the steamgenerator doesnot
cover the safety level mark.
If the indicator lights up continously, this means that the
steam generator is still being filled with water, the heating
elements,however, canbeactivated.Thesteamgenerator
is ready for use. When the indicator light goes out, this
means that the water level inside the steam generator is
correct and there is no need to top up.
SPECIALFUNCTIONS
EMPTYING THE STEAM GENERATOR
(Fig.4No.23)
The appliance is fitted with a motor-operated discharge
valve.Undernormalconditionsitisclosedandthisisshown
by the indicator light above the symbol going out.
Uponpressingthe buttonthevalveopens sothatthe water
insidethe steam generator can drainoff.This operation is
shown by the relative indicator light coming on. Once the
boilerhas beendrained thebutton must be pressed again
to close the valve.
CLEAN (Fig.4No.24)
The ”CLEAN” programme is a cleaning, not a cooking
programme.It shouldbeactivated regularlyat theendof a
working day with the air-o-steam®in order to clean the
appliance.
To activate this programme, press the button for about 3
seconds,afterwhichtherelativeindicatorlightstopsblinking
and remains on.The steam generator starts working and
thecookingchamberishumidified.Aftertheaudiblewarning
signal, a detergent has to be sprayed onto the walls and
theair baffles insidethe cooking chamber.Close the door
andpressthe”CLEAN” buttonagain.The countdownofthe
action time for the detergent, i.e. 10 minutes, starts.After
this,the steamgenerator continuesto operate for another
20 minutes, during which all deposits are removed. The
indicator light comes on during the second stage. An
acoustic signal is activated at the end of the programme.
WASTESTEAM QUENCHING SYSTEM
(Fig.4 No.25)
This button can be used to activate or deactivate the
thermostatic waste steam quenching system in all the
cookingmodes.
Iftheair-o-steam®isplacedunderasteamextractionhood,
the steam need not be condensed by spraying cold water
into the waste tube. This saves on water. Upon pressing
this button, the relative indicator light above the symbol
startsblinking,showingthatthesteamcondensationdevice
is deactivated.
By pressing the button again, the system is re-activated
andthewaterinputcontrolgovernedbyathermostatallows
the steam to be condensed. After water input, the relative
indicator light comes on.
MANUAL HUMIDIFICATION (Fig.4No.26)
Thisbuttonmaybe used toincreasethedegree of humidity
insidethe cooking chamber by introducingwater.
The water input time is limited to about 5 seconds. The
relative indicator light above the button is on during water
input.The degreeof humidity inthe cookingchamber may
bealteredtoindividualrequirementsbypressing this button
several times.

I-450-BE 19
STORAGEOF COOKING PROGRAMMES
To store a COOK-STEP or a set sequence in the ”PROG”
modeunder awell-defined programmenumber,press the
and buttons simultaneously for about 1.5 seconds.
The indicator light above the button blinks for 1.5
seconds and then remains fixed. The display relating to
thecookingprogrammesis nowactivatedandthe increase
anddecreasebuttonsmaybeusedtochooseaprogramme
number.
Make sure that the figures corresponding to programmes
that are already stored are always lit. The free storage
positions may be identified by the fact that the relative
number blinks. Choose a free storage position and then
press button for about 1.5 seconds until the relative
blinking indicator light remains fixed.
To exit from the storage programme, press the and
buttons simultaneously until the above-mentioned yellow
indicator light goes out.
The set cooking programme can now be found under the
chosen programming number. If an error occurs during
programmingor ifnothing hasbeen stored,this sequence
may be interrupted. If the indicator light corresponding to
the button comes on, it is possible to exit from the
storage mode by pressing on the same.
Note: itis advisableto mark eachparameter andset-up of
thestored cookingprogrammes in atable.This willensure
correctcombination betweenthe different cookingmodes
and programmes.This table also allows the programmes
tobe rapidlystored againafter anywork carried out on the
electronic circuit by a technician.
ERASINGA COOKING PROGRAMME
Usingthe button , selectthe ”AUTO” mode;the relative
indicatorlight comeson.Thenpress the and buttons
simultaneously for about 1.5 seconds. The indicator light
above button blinks for 1.5 seconds and then remains
fixed.Access to the stored programmesmaynowbegained
and the display for the cooking programmes is activated.
Using the increase and decrease buttons, the cooking
programme to be erased may be selected. Only a stored
programme number may be erased, i.e. the programme
number must appear lit up on the display.
CLEARENTRY (Fig.4No.20)
Using the ”CLEAR ENTRY” button, the programme may
now be erased. Press the button until the number with a
fixedlightonthedisplay, correspondingto the programmes,
startsblinking, i.e.when theprogramme inquestion isin a
changeablebuffer storage.
To exit from the erasing process and to erase the actual
cookingprogrammefrom thebuffer storage, pressbuttons
and again until the yellow indicator light relating to
button goes out.
Theprogrammeiserasedfromthememoryandthisstorage
position is consequently free.
CHANGINGANDCOMPLETING COOKING PROGRAM-
MES
Tochangeastored programme,proceedasfor theerasing
stage.Follow thesame sequenceof operationsdescribed
above in the paragraph ”Erasing a cooking programme”,
includingpressing the”CLEAR ENTRY”button.
Theprogrammein questionisnow inabufferstorage.This
isshownbyablinkingnumberonthedisplaycorresponding
tothe programmes.Theparametersmay nowbe changed
orthe COOK-STEPS completed or erased.Press the two
buttons + simultaneously until the yellow indicator
light relating to button goes out. The change is now
stored.
OPERATING IN THE”AUTO” MODE
After having switched on the appliance and chosen the
”AUTO” mode, the required cooking programme may be
recalledusing the increase and decreasebuttons.
All stored values and the cooking programme data are
shownbytherelativeindicatorlights comingon. Inaddition,
the ”COOK-STEP” button may be used to recall the diffe-
rentcooking sequences.
START
STOP
START/STOP (Fig.4No.3)
In the ”PROG” mode, after having selected the cooking
time,temperature,cookingmodeandfanspeedoracooking
programmestoredinthe”AUTO”mode,thecookingprocess
may be activated using the ”START/STOP” button. The
relativeyellowindicatorlightcomeson.Thecookingprocess
maybeinterruptedbypressingonthe”START/STOP”button
for more than 3 seconds.
ALARMAND SELF-DIAGNOSIS
The system has the possibility of indicating failures and
operating anomalies on the display corresponding to the
cookingchamber temperatureand thecore temperature.
E Pt 1 Interruptionor short-circuitof thetemperature
sensorinside the cooking chamber
E Pt 2 Interruptionor short-circuitof thetemperature
sensorinside the steam generator
E Pt 3 Interruption or short-circuit of the core
temperaturesensor
E Pt 4 Interruptionorshort-circuitofthetemperaturesensor
insidetheby-passtube(steamregulation)
E Pt 8 Interruptionor short-circuitof thetemperature
sensoron theelectronic PC-board
E SCH Overheatingof theelectronic PC-board dueto
lack of cooling air
E tub Interventionof the temperaturelimiter inside the
steamgenerator (T> 180°C)
E tuc Intervention of the temperature limiterinside the
cookingchamber (T> 320°C)
ECuP Break of the cooking time limitation (T >250°C)
EFLP Failureofthemotor-activatedsteamreleasevalve
for the cooking chamber (valid only for VIII, X)
Note: In the event of failure, a continuous audible alarm
can be heard and the error code is stored. The cooking
process may continue, e.g. in the event of failure of the
meatprobe with thetime as new parameter.

20 I-450-BE
Afewmoreimportant instructionsto be observed inorder
to get the most from your new convection-steamer air-o-
steam®.
1. Whentheapplianceisswitchedoff,leavethedoorslightly
open so that air may circulate freely inside the cooking
chamber, letting the remaining humidity escape, the
cooking chamber is ventilated and stays clean.
2. Check that the safety valve is clean and working
properly.Nosteam should escapeduringoperation.The
valve casing should be easily removable.
3. Occasionally coat the door seal with a special grease
“NontropPLB DR”(50 or20 gtube, orderNo. 400107)
on the indicated places.
4. Never use sharp objects on the seal.
5. The convection-steamers air-o-steam®are protected
against water jets (type of protection IPX5). This type
of protection, however, does not permit cleaning with
high-pressurejets!
6. Make sure that the cooking chamber steam release
aperturesituated above theappliance isnotobstructed
by plates or cloths.
7. During periods of longer inactivity, e.g. at night,
weekends, early closing days, holidays, etc., the
appliancemustbedisconnected from theelectricityand
gas mains supply, the main gas valve must be closed
and the door left open.
DESCALING THE STEAM GENERATOR WITH
CHEMICALPRODUCTS
The softened water supply should have a hardness of
5 - 7°dH. If the degree of hardness is higher, a suitable
watersoftener (ionisation)must be installed.From timeto
time the steam generator must be completely descaled.
Theintervals between each descaling operationdepends
onthe frequencyof useof theappliance and the hardness
of the water.
1. Make sure that air circulates freely in the room where
the appliance is installed.
2. Wear protective clothing, glasses and gloves.
3. Use a descaler for the steam generator.
4. With the appliance switched off, empty the steam
generator. Then close the drain cock of the appliance
(orpress thebutton corresponding) .
5. Removethe rubberplug situatedon theupper external
partof theappliance. Usinga funnel, slowly pour inthe
preparedsolutionofwateranddescalerso that ittrickles
intothe steamgenerator. Leavethe productto actfor 1
hour and then open the drain cock.
6. Carefullyrinse the steamgenerator and the filling pipe
with clean water. Replace the safety device.
7. Carryout asteam cyclefor 10minutes, thenempty the
steamgenerator again.
8. Lastly, check if there are still traces of descaler in the
steam generator or in the cooking chamber. This can
be done very simply: place half a cup of fresh milk in
the cooking chamber, close the door and start steam
cooking.Ifthe milkbegins to curdleafter afewminutes,
another rinsing cycle must be carried out following the
instructions given in point 6.
5. CLEANING AND MAINTENANCE
The appliance must be cleaned thoroughly at the end of
eachworkingday.The applianceisprotectedagainstwater
jets (type of protection IPX5). This type of protection,
however, does not permit cleaning with a water hose or
high-pressurejets.
General indications
Undernocircumstancesmustthe drainpipebeobstructed,
whether due to fats or food particles. It is therefore
necessary to clean the drain pipe regularly and rinse it by
flushingthrough withwater.
Thefilter mustalways beinserted inthe cooking chamber.
Recommendations for daily cleaning:
Rinse the steam generator every day. For versions VII,
VIII andXof the appliance, a motor-operated drain cock
is installed (for operation see indications under “Special
functions-EMPTYINGTHESTEAMGENERATOR”).Close
the drain cock before operation. It is advisable to activate
this cycle at the end of each working day, to avoid a build-
up of scale on the heating elements and to reduce the
normal scale considerably on the other parts.
This operation is very simple:
1. Put the appliance in the “Steam” and “Full power”
operatingmode.
2. Assoonassteamisbeing produced,i.e. whentheglass
of the window begins to steam up, open the steam
generatordischarge cock.
3. Close the discharge cock again after 2 minutes have
elapsed. The steam generator will automatically refill
withwater.
Fordailycleaningofthecookingchamber,puttheappliance
in the “Steam” mode for about 5 min.Then open the door
andspray acleaning product insidethe cookingchamber.
Depending on how dirty it is, leave the product to act for
about15 -30min. Startthe applianceagainin the“Steam”
modeandleaveforabout 10min.Thenremove all residues
byrinsing witha hoseor wiping out with acloth orsponge.
Tocleanmorethoroughly,theairbufflesmaybedetached
or the trolley structure removed. If the fat filter is installed,
detach it from the ventilation panel and disassemble.
Removethe retaining wirefrom aroundthefilter frameand
remove each component element. The ventilation panel
may be easily removed after loosening the two top nuts
(SW 10), by moving it up and draw the lower part slightly
forwards.Proceed withcleaningthe cookingchamber and
the disassembled pieces. The water will be discharged
through the drain pipe. Replace the pieces following the
aboveprocedureinthe reverse order.When reassembling,
make sure that the check pin holds the ventilation panel
firmly in place.