Metos HALO Series User manual

COLD DISPLAY
HALO
S/N: 10960903010010 Rev.: 1.2
4312000, 4312002, 4312004, 4312030, 4312032, 4312034, 4312060, 4312062, 4312064, 4312304, 4312306, 4312308,
4312100, 4312102, 4312104, 4312110, 4312112, 4312114, 4312130, 4312140, 4312132, 4312134, 4312180, 4312182,
4312184, 4312186, 4312188, 4312190, 4312286,
4312160, 4312162, 4312164, 4312170, 4312172, 4312174, 4312192, 4312194, 4312196,
4312106, 4312108,
4312200, 4312202, 4312204, 4312210, 4312212, 4312240, 4312280, 4312282, 4312284, 4312288, 4312290, 4312260,
4312262, 4312264, 4312270, 4312272, 4312274, 4312292, 4312294, 4312296, 4312292, 4312294, 4312296, 4312304,
4312306, 4312308
4312000, 4312002, 4312004, 4312030, 4312032, 4312034, 4312060, 4312062, 4312064, 4312304, 4312306, 4312308,
4312100, 4312102, 4312104, 4312110, 4312112, 4312114, 4312130, 4312140, 4312132, 4312134, 4312180, 4312182,
4312184, 4312186, 4312188, 4312190, 4312286, 4312160, 4312162, 4312164, 4312170, 4312172, 4312174, 4312192,
4312194, 4312196, 4312106, 4312108, 4312200, 4312202, 4312204, 4312210, 4312212, 4312240, 4312280, 4312282,
4312284, 4312288, 4312290, 4312260, 4312262, 4312264, 4312270, 4312272, 4312274, 4312292, 4312294, 4312296,
4312304, 4312306, 4312308

2.9.2009 Rev. 1.2
Dear Customer,
Congratulations on deciding to choose a Metos appliance for your kitchen activities. You
made an excellent choice. We will do our best to make you a satisfied Metos customer
like thousands of customers we have around the world.
Please read this manual carefully. You will learn correct, safe and efficient working meth-
ods in order to get the best possible benefit from the appliance. The instructions and hints
in this manual will give you a quick and easy start, and you will soon note how nice it is
to use the Metos equipment.
All rights are reserved for technical changes.
You willfind the main technical data on the rating plate fixed to the equipment. When you
need service or technical help, please let us know the serial number shown on the rating
plate. This will make it easier to provide you with correct service.
For your convenience, space is provided below for you to record your local Metos service
contact information.
METOS TEAM
Metos service phone number:...............................................................................................
Contact person:....................................................................................................................

2.9.2009 Rev. 1.2

2.9.2009 Rev.
1. General .......................................................................................................... 1
1.1 Symbols used in the manual .......................................................................................... 1
1.2 Symbols used on the appliance ...................................................................................... 1
1.3 Checking the relation of the appliance and the manual ................................................. 1
2. Safety .............................................................................................................. 2
2.1 Safe use of the appliance ............................................................................................... 2
2.2 Disposal of the appliance ............................................................................................... 2
3. Functional description .................................................................................. 3
3.1 Intended use of the appliance ........................................................................................ 3
3.1.1 Use for other purposes ........................................................................................... 3
3.2 Operating principle ........................................................................................................ 3
3.2.1 Operating switches ................................................................................................. 4
4. Operating instructions ................................................................................. 5
4.1 Operation ....................................................................................................................... 5
4.2 After use ........................................................................................................................ 6
4.2.1 Cleaning ................................................................................................................. 6
5. Installation ..................................................................................................... 7
5.1 Operating conditions ..................................................................................................... 7
5.2 Transport and storage .................................................................................................... 7
5.3 Unpacking the appliance ............................................................................................... 7
5.4 Installation ..................................................................................................................... 8
5.4.1 Condenser air circulation ....................................................................................... 8
5.5 Electrical connections .................................................................................................... 9
5.6 Start-up .......................................................................................................................... 9
5.7 Temperature adjustment ................................................................................................ 9
5.7.1 Thermostat operation .......................................................................................... 10
6. Troubleshooting .......................................................................................... 11
7. Spare parts .................................................................................................. 13
7.1 Voltage codes .............................................................................................................. 15
7.2 Product codes ............................................................................................................... 15
8. Technical specifications .............................................................................. 43

2.9.2009 Rev.

2.9.2009 Rev. 1.2
General
1
1. General
Carefully read the instructions in this manual as they contain important information re-
garding proper, efficient and safe installation, use and maintenance of the appliance.
Keep this manual in a safe place for eventual use by other operators of the appliance.
The installation of this appliance must be carried out in accordance with the manufactur-
er’s instructions and following local regulations.
Persons using this appliance should be specifically trained in its operation.
Switch off the appliance in case of failure or malfunction. The periodical function checks
requested in the manual must be carried out according to the instructions. Have the appli-
ance serviced by a technically qualified person authorized by the manufacturer and using
original spare parts.
Not complying with the above may put the safety of the appliance in danger.
1.1 Symbols used in the manual
This symbol informs about a situation where a safety risk might be at hand.Given instruc-
tions are mandatory in order to prevent injury.
This symbol informs about the right way to perform in order to prevent bad results, appli-
ance damages or hazardous situations.
This symbol informs about recommendations and hints that help to get the best perform-
ance out of the appliance.
1.2 Symbols used on the appliance
This symbol on a part informs about electrical terminals behind the part. The removal of
the part must be carried out by qualified persons only.
1.3 Checking the relation of the appliance and the manual
The rating plate of the appliance indicates the serial number of the appliance. If the man-
uals are missing, it is possible to order new ones from the manufacturer or the local rep-
resentative. When ordering new manuals it is essential to quote the serial number shown
on the rating plate.

2.9.2009 Rev. 1.2
Safety
2
2. Safety
2.1 Safe use of the appliance
For safe use of the appliance, observe the following safety instructions:
• When moving or servicing the appliance, always unplug it from the power supply.
• While cleaning the appliance, be cautious not to allow the electrical devices to
come into contact with water. Spraying water in the immediate vicinity of the ap-
pliance is forbidden.
• Exposing the appliance to the rain is forbidden.
• Only connect the appliance to an earthed socket.
If the appliance is not used for a long time, it should be unplugged from the power supply,
cleaned and wiped dry on the inside.
2.2 Disposal of the appliance
The appliance contains parts and components, the disposal of which requires special treat-
ment. Contact local authorities to obtain instructions on how to dispose of the appliance.

2.9.2009 Rev. 1.2
Functional description
3
3. Functional description
3.1 Intended use of the appliance
The appliance is designed for use in serving lines, restaurants, cafés and kitchens.
The upper section and basin of the cold display are designed for short-time storage of pre-
cooled foodstuffs before distribution. The appliance is not intended for refrigerating prod-
ucts from higher temperatures. The cupboard of models equipped with a refrigerated
cupboard is intended for cold storage of products.
The front of theHalo air curtain display is open. Keeping the productscold is ensured with
effective cold air circulation.
3.1.1 Use for other purposes
Use of the appliance for any other purposes is prohibited.
Consult the manufacturer in case you intend to use the appliance for other purposes than
stated above.
3.2 Operating principle
The applianceis equipped with itsownrefrigerationunitoritcan be connected toa central
unit.

2.9.2009 Rev. 1.2
Functional description
4
3.2.1 Operating switches
Operating panel
1. Main switch (green)
2. Light switch (orange)
3. Thermostat
Operating panel (models with refrigerated cupboard)
1. Main switch, display (green)
2. Thermostat, display
3. Light switch (orange)
4. Thermostat, refrigerated cupboard
5. Main switch, refrigerated cupboard (green)

2.9.2009 Rev. 1.2
Operating instructions
5
4. Operating instructions
4.1 Operation
Before putting products in the unit, wait until it has reached the temperature set with the
thermostat.
Correct cold storage of foodstuffs facilitates kitchen activities and affects energy con-
sumption. Please observe the following points when using the appliance:
• Do not put products in the appliance until it has reached the correct operating tem-
perature.
• Always keep the products in good order.
• Do not unnecessarily keep the cupboard door open.
• Always keep the sliding doors of the showcase properly closed.
• Do not store spoilt food in the unit.
• Dry moisture off the shelves and interior walls as needed.
• Monitor the internal temperature of the unit daily.
• Preserve the products in dishes fitted with lids or cover them with a plastic foil.
This helps to keep the evaporator free from ice.
When placing products in the cupboard, sufficient air circulation should be ensured. Do
not place products in touch with walls.
The appliance is equipped with automatic defrost, which means that the user does not
need to bother with defrosting.
In normal conditions, the thermostat need not be adjusted. In case adjustment, however,
is required, see instructions in “Installation/Temperature adjustment”.
Do not adjust temperature below + 4°C.
Warm, humid summer-time may cause condensation on the exteriorsurfaces of the refrig-
erated display. Humidity is not present inside the display, so it does not damage products.
The problem can be managed by slightly raising the temperature of the appliance. In gen-
eral, a rise as small as 2°C will considerably decrease condensation.

2.9.2009 Rev. 1.2
Operating instructions
6
4.2 After use
4.2.1 Cleaning
In normal use, the appliance does not require any other daily care than sufficient cleaning.
The interior and exterior of the appliance is mainly of stainless steel. For cleaning the in-
terior and exterior, use neutral or slightly alkaline cleaning agents or wipe the surfaces
with a damp cloth. Abrasive materials should not be used, especially not on acrylic sur-
faces.
Cleaning the appliance with a hose is forbidden. Do not either spray water in the immedi-
ate vicinity of the appliance,because water sprayed can get into the vent holes of the com-
pressor cassette or into the display’s electrical connections, thus causing a hazardous
situation.
The inner part of the basin can be detached without tools for cleaning.
Clean the condenser (units equipped with own machinery) once a week. The machinery
does not normally require any other cleaning.
Vacuum-clean the condenser by using a plastic nozzle to avoid damaging the condenser.
Before vacuum-cleaning the condenser, switch off the appliance at the power supply by
unplugging the electric cable from the socket.
Other cleaning measures than the condenser cleaning should be carried out by an author-
ised service company.
It is recommended to have the compressor cassette cleaned inside by a service company
1-2 times a year.

2.9.2009 Rev. 1.2
Installation
7
5. Installation
5.1 Operating conditions
The appliance should not be placed in a location exposed to heavy thermal load, e.g. direct
sunlight or thermal radiators. Positioning cold equipment close to bains marie and ovens
should be avoided.
The appliance is designed for operarion in normal ambient conditions (i.e. termperature
+10°C to + 25°C, relative humidity max. 60 %).
5.2 Transport and storage
The appliance should be transported to the installation site in its transport package.Do not
remove package until in the immediate vicinity of the installation place. The appliance
should be transported in an upright position.
The appliance is made of polished stainless steel and of plastic/glass, so it can become
scratched very easily in site conditions. Therefore, the appliance should be delivered to
the installation site at a later stage of construction work. It is forbidden to use the appli-
ance as an installation base.
The appliance should not be stored outdoors, not even in its transport package.
In case the appliance has been stored in a non-heated location so that its temperature and
particularly the temperature of the machinery has fallen below 0°C, the appliance should
be kept in room temperature until the machinery temperature is at least 10°C. Starting the
cold machinery may damage the compressor.
In case the appliance has been heavily tilted just before the intended start-up, you should
wait about 30 minutes before switching the appliance on. Otherwise the oil accumulated
in the suction inlets of the compressor may damage the compressor with a hydraulic
shock.
5.3 Unpacking the appliance
Remove foils protecting the stainless steel and plastic surfaces cautiously to prevent the
surfaces from getting scratched.

2.9.2009 Rev. 1.2
Installation
8
5.4 Installation
The appliance is supplied with adjustable legs. Mount the appliance with the help of the
adjustable legs in a horizontal position as accurately as possible, ensuring that the appli-
ance rests evenly on all legs. If adjustment is not performed with great care, the door and
locks may not work properly.
It is not possible to adjust an appliance fitted with wheels.
Units intended for marine use are welded in place or bolted from the mounting holes of
the adjustable legs to the deck.
5.4.1 Condenser air circulation
Ensure sufficient air inlet/air circulation for the condenser.
The display should notbe installed in a place where external air flow disturbsthe display’s
air circulation. Disturbance can be caused, for example, by
• positioning of ventilation equipment
• heat sources that radiate or blow warm air towards the display’s front section (not
either should these be located near the display ends).
If a refrigerated display is installed in a serving line, care should be taken that there is no
air gap between the unit and the tray slide, through which warm air could get into the
unit’s cooling air circulation (item A).
Make sure that the condenser air inlet is not blocked and that warm air can freely exit
through the front section (and cannot get back into the unit).
Condenser air circulation (models with refregerated cupboard)
A

2.9.2009 Rev. 1.2
Installation
9
5.5 Electrical connections
Connect the appliance to the power supply with an earthed socket. For making the con-
nection, a socket protected with a fuse of 16 A has to be provided for each unit.
5.6 Start-up
After connecting the appliance to the power supply, turn on the main switch (green) and
make sure that the indicator light of the switch lights up. Lighting is switched onusing the
orange switch. The model equipped with a refrigerated cupboard has a separate main
switch (green).
When the main switch is turned on, the internal temperature of the appliance is shown on
the temperature display (control unit). The compressor starts operating after a short time
delay.
In case you have problems with taking the appliance into use, contact an authorized serv-
ice workshop.
5.7 Temperature adjustment
The temperature of the appliance is factory set to the value appropriate for each unit. This
value should be altered on careful consideration only. Adjusting the temperature too low
(below +4ºC) may lead to rapid freezing up of the evaporator and to continuous operation
of the compressor.
The appliance is fitted with an electronic control unit for temperature and defrosting. The
temperature display panel and the operating switches are located on the upper section of
the refrigeration unit.

2.9.2009 Rev. 1.2
Installation
10
5.7.1 Thermostat operation
The microprocessor-based control unit contains a series of parameters to control the re-
frigerated display’s functions. Each refrigeration unit has been pre-programmed at the
factory. The user can carry out two programming functions: setting the temperature and
starting a manual defrost cycle.
Thermostat ID 974
Buttons
Press the “set” (P4) button twice to display the setvalue.Use the arrow UP (P1) and arrow
DOWN (P2) buttons to change this value. When the correct value has been selected, wait
for 5 seconds to confirm this value.
A manual defrost cycle can be started by pressing and holding down the arrow UP (P1)
button for about 5 seconds. The defrost indicator light L2 starts flashing.
LED indicator lights
LED L1 on indicates that an alarm has occurred; flashing, indicates that an alarm has been
silenced.
LED L2 on indicates that a defrost cycle is in progress; flashing, indicates that a manual
defrost cycle is in progress.
LED L3 on indicates that the compressor is on; flashing, indicates that there is a delay, a
safety delay or a compressor switch-on block.
LED L4 indicates that the fan is working.

2.9.2009 Rev. 1.2
Troubleshooting
11
6. Troubleshooting
In case the appliance does not function as expected, review the following list of problems
to find out if the appliance can be put in order without a service call. In all enquiries,
please contact an authorized service company. Most problems can be managed on the
phone.
The appliance does not contain parts that can be serviced by the user. Service must be car-
ried out by an authorised service company.
PROBLEM POSSIBLE CAUSE ACTION
The appliance does not start even if the
main switch is turned on. Electrical cable is not properly plugged in the socket. Put the cable properly in the socket.
Defective fuse. Replace the fuse.
The compressor is running, but the tem-
perature does not fall to the set value. The
set value is checked by pressing the SET
button.
Condenser is covered by dust. Vacuum-clean the condenser.
Prevented air circulation beside the
condenser. Remove obstacles to ensure free air circulation.
Products placed in a way preventing
air circulation inside the cupboard. Arrange the products so that air can circulate freely.
Ambient temperature exceeds the
maximum value (+25ºC, relative hu-
midity 60%)
Make sure that the appliance has not
been placed close to a heat source. If
necessary, provide mechanical ventila-
tion.

2.9.2009 Rev. 1.2
Technical specifications
43
8. Technical specifications
Refrigeration circuit diagram J06335 A3
Wiring diagram S00236 I3
Installation drawing J06367 A2
Installation drawing J06369 A2
Installation drawing J06372 A2
Installation drawing J06373 A2
Installation drawing J06376 A1
Installation drawing J06377 A1
Installation drawing J06379 A1

Refrigeration circuit diagram J06335 A3

Wiring diagram S00236 I3