LU-VE ALFA Optigo SFMS User manual

Optigo SFMS Product description
Product labels
Unpacking and lifting
Installation
Maintenance
Spare partsInstruction manual
31599313EN-03
ORIGINAL INSTRUCTIONS
Slim commercial air coolers
for A2L refrigerants

31599313EN-03
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Alfa LU-VE is a trademark registered and owned by LU-VE Group.
Alfa LU-VE reserves the right to change specifications without prior notification.
Index
1 Important information..............................................................................................................4
1.1 Disclaimer...................................................................................................................................4
1.2 Safety precautions......................................................................................................................4
1.3 Intended use ..............................................................................................................................4
1.4 Wheretondproductinformation ..............................................................................................5
1.5 Warning symbols........................................................................................................................5
1.6 Health and hygiene ....................................................................................................................6
1.7 Checks at delivery .....................................................................................................................6
1.8 Return of unused heat exchangers ............................................................................................6
1.9 Guarantee ..................................................................................................................................6
1.10 Disposal .....................................................................................................................................6
1.11 Useofammablegas.................................................................................................................6
2 Product description .................................................................................................................8
2.1 General information and application...........................................................................................8
2.2 Standardconguration ...............................................................................................................8
2.3 Optional features........................................................................................................................9
2.4 Code description ........................................................................................................................9
3 Product labels.........................................................................................................................10
4 Transport and storage ...........................................................................................................11
5 Unpacking and lifting.............................................................................................................11
6 Installation ..............................................................................................................................13
6.1 Mounting dimensions ..............................................................................................................13
6.2 Mounting bracket .....................................................................................................................14
6.3 Location and technical spaces .................................................................................................14
6.4 Refrigerant connections ...........................................................................................................15
6.5 Pressure test ...........................................................................................................................15
6.6 Drain line ..................................................................................................................................16
6.7 Electrical connections ..............................................................................................................17
6.8 Power failure ............................................................................................................................17
6.9 Fan motors connections ..........................................................................................................18
6.10 Defrost......................................................................................................................................18
6.11 Electric defrost (E) ..................................................................................................................19
6.12 Drip tray heater (HD)................................................................................................................20
6.13 Heavy defrost kit (EH) .............................................................................................................20
7 Maintenance............................................................................................................................21
7.1 Shut down periods....................................................................................................................21
7.2 Moisture in the refrigeration system .........................................................................................21
7.3 Cleaning and disinfecting .........................................................................................................21
7.4 Casing ......................................................................................................................................21
7.5 Coil and drip tray ......................................................................................................................21
7.6 Side panels opening.................................................................................................................22
7.7 Drip tray and fan plate opening ................................................................................................22
7.8 Electric defrost (E) replacement...............................................................................................23
7.9 Drip tray heater (HD) replacement ...........................................................................................24
7.10 Heavy defrost kit (EH) mounting ..............................................................................................25
7.11 Fans .........................................................................................................................................27
7.12 Fan replacement .....................................................................................................................28

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Alfa LU-VE reserves the right to change specifications without prior notification.
8 Residual risks.........................................................................................................................29
9 Troubleshooting .....................................................................................................................29
10 Spare parts..............................................................................................................................30

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Alfa LU-VE is a trademark registered and owned by LU-VE Group.
Alfa LU-VE reserves the right to change specifications without prior notification.
1 Important information
1.1 Disclaimer
This Instruction Manual applies to all Optigo SFMS air cooler products. Manual must be carefully
examined and instructions should be followed up at all times.
Alfa LU-VE does not accept liability for any damage resulting from failure to comply with or
incomplete compliance with the instructions as given in the manuals and order-related documents.
As the heat exchanger is supplied indirectly, the producer is not acquainted with its actual
application.
1.2 Safety precautions
Do not modify the unit by removing any of the safety guards or by-passing any of the safety
devices. All work on the equipment must be carried out by trained personnel.
For handling, installing and maintenance operations it is essential to comply as follows:
• Employ authorized personnel only.
• Wear protective gloves.
• Overhead loads: never stand or walk below the loads.
All on-site electrical connection are the responsibility of the installer. For electrical wiring operations
it is essential to comply as follows:
• Employ authorized personnel only.
• Make sure the power line circuit is open.
• Installation of a main switch is mandatory and is the responsibility of the installer.
• The main switch on the general power panel is open and padlocked.
• The electrical supply is suitable for the equipment supplied.
For header/distributor connection operations it is essential to comply as follows:
• Employ authorized personnel only.
• Make sure the supply circuit is open (no pressure).
• When performing welding operations make sure the flame is not directed towards the equipment
(insert a shield If required).
Hydraulic circuit shall comply as follows:
• Refrigerant, temperature and pressure must agree with the data on the product label of the
relevant heat exchanger.
• The supplied heat exchanger is optimized for the refrigerants as stated in the data sheet or
order documents. Please contact Alfa LU-VE before using any other refrigerants. The allowed
maximum pressure (design pressure PS) is noted on the type plate. During production the heat
exchanger was subjected to a strength test exceeding the design pressure PS. However, during
normal use the design pressure PS may not be exceeded.
• Heat exchangers supplied by Alfa LU-VE are normally not equipped with a high-pressure cut
out. The installer is responsible for fitting a high-pressure cut out on the system in which the
heat exchanger is used.
• The heat exchanger shall not be blocked in. If the ambient temperature rises, the pressure could
rise and exceed the design pressure.
1.3 Intended use
Air coolers are partly completed machinery according to Machine Directive 2006/42/EC (EU
market) - The Supply of Machinery (Safety) Regulations 2008 (UK market) and are intended for
incorporation in cooling systems. Declarations of Incorporation are available on alfa.luvegroup.com.

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Alfa LU-VE is a trademark registered and owned by LU-VE Group.
Alfa LU-VE reserves the right to change specifications without prior notification.
The product is built according to the following standards and directives:
EU market UK market
2014/68/EU Pressure Equipment Directive (PED) Pressure Equipment (Safety) Regulations 2016 (PER)
EN 60204-1 Safety of Machinery - Electrical equipment of machines The Electrical Equipment (Safety) Regulations 2016
2014/30/EU Electromagnetic Compatibility Directive Electromagnetic Compatibility Regulations 2016
2014/35/EU Low Voltage Directive The Electrical Equipment (Safety) Regulations 2016
Any applicable local or national legislation
However it is forbidden to operate our equipment before the machine incorporating the products or
making part thereof has been declared to be in conformity with the EC Machine Directive.
It is not permitted to use the heat exchanger for any purpose other than the one it was designed for
by Alfa LU-VE.
1.4 Where to find product information
Detailed technical data for individual product models are available in order related documents,
on the product label and in product data sheets. Comprehensive technical information for all Alfa
LU-VE air heat exchanger products is available on-line on alfa.luvegroup.com. This includes:
• Product manuals
• Instruction manuals
• Product leaflets & brochures
• Product data sheets (selection software)
• Dimensional drawings
• Certificates
Alfa LU-VE offers world-wide service and support. In case of any questions
or uncertainty please contact your local Alfa LU-VE representative.
Contact addresses are available at alfa.luvegroup.com.
1.5 Warning symbols
The following warning symbols are used in Alfa LU-VE instruction manuals.
General warning.
Risk of malfunctioning and/or
damage.
Hot surfaces. Danger of burns.
Wear adequate protection.
Moving parts. Danger of injuries.
Do not operate without protection guard mounted.
Sharp surface. Danger of cutting injuries. Wear
adequate protection.
Overhead load.
Never stand or walk below the load.
Mandatory prescription.
Follow instructions as provided.
Forklift trucks or other logistic vehicles.
Stay clear of working space.
Risk of injuries.
Wear head protection.
Electrically powered component. Switch off power
supply before any maintenance or installation
activity.
Risk of injuries.
Wear safety footwear.
Cold parts. Danger of frostbite injuries.
Wear adequate protection.
Risk of injuries.
Wear protective gloves.
Danger of crushing.
Wear adequate protection.
Manuals must be carefully examined and
instructions should be followed up at all times.
A2L flammable gas.
alfa.luvegroup.com/sfms

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Alfa LU-VE is a trademark registered and owned by LU-VE Group.
Alfa LU-VE reserves the right to change specifications without prior notification.
1.6 Health and hygiene
If the equipment is used in the food industry, responsibility with regard to hygienic conditions lies
with the end user.
1.7 Checks at delivery
At the moment of delivery, carefully check the units.
All finned coils are pressure tested with dry air, sealed and supplied with a slight overpressure. Prior
to installation, the leak resistance must be checked with the schrader valve.
Any present damage must be reported on the delivery note with a description of the damage.
Damaged heat exchangers, including when the damage is not externally visible, are to be reported
to the shipping agent and Alfa LU-VE within 24 hours.
1.8 Return of unused heat exchangers
Air heat exchangers that have been delivered in accordance with orders are in principle not
returnable. Heat exchangers can only be returned under certain conditions and following
consultation with Alfa LU-VE. This applies exclusively to unused units. The heat exchangers that
are to be returned should be delivered carriage paid to Alfa LU-VE in the original, undamaged and
unwritten factory packaging. Not returnable are:
• Heat exchangers older than three months from the invoice date.
• Heat exchangers that have already been built in and/or are damaged.
1.9 Guarantee
For our guarantee conditions, we refer to the Terms of Delivery. In general, the warranty period
between Alfa LU-VE and the customer is 24 months from factory invoice date or 12 months of
operation, which ever comes first. Heat exchangers must not be returned or disposed of, other
than in accordance with instructions from Alfa LU-VE. Contact your local Alfa LU-VE representative
before any remedial action is taken on the units, otherwise warranty may be void.
1.10 Disposal
After decommissioning the heat exchanger coil should be emptied from refrigerant fluids. Avoid
any emissions in the environment. Any refrigerants and oil residuals must be properly disposed of
according to applicable environmental regulations. The fully emptied heat exchanger unit, including
all electrical components, should be handed in to the proper authorized companies for recycling.
Alfa LU-VE products are made of:
• Plastic materials: polyethylene, ABS, rubber.
• Matallic materials: iron, stainless steel, copper, aluminium (possibly treated).
1.11 Use of flammable gas
• The product must be stored and installed in rooms where the use of open flames or other
ignition sources is forbidden.
• During transport, handling, installation, the product and, in particular, the pipes must be
protected to avoid physical damage which may cause it breakage.
• In the event of suspicious damages or doubts about the correct handling (eg. damaged
packaging) do not install the product before carrying out a thorough integrity check.
• Install the product only and exclusively in places that comply with the minimum size and/or air
exchange requirements established by the applicable standards, in relation to the total charge of
flammable fluid provided for in the installation in which it is incorporated.
• All ordinary and extraordinary maintenance operations must be performed only by qualified
personnel in the use of equipment with flammable fluid. Special attention to operations that
require interventions on the pipes.
• The use of refrigerants different than those indicated in the data plate or in this manual is
forbidden.
In general, the use of refrigerants that are not included in the list of the IEC 60335-2-40 Annex B
standard is forbidden.
• Before performing any maintenance operation, exclusively by qualified staff, perform a check for
the absence of gas in the room and around the product through an appropriate detector.
• Before performing any operation for opening the pipes of the refrigerant circuit, by means of

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Alfa LU-VE is a trademark registered and owned by LU-VE Group.
Alfa LU-VE reserves the right to change specifications without prior notification.
mechanical operations or with open flames, make sure that the circuit does not have any
quantity, even minimal, of inflammable gas and that it has been washed internally with inert
gas (ex. nitrogen). All operations must be performed by personnel qualified in the use of
flammable gases.
• The product shall not be modified in any part of it, by removing or adding components.
• The product is not an ATEX product. The connection of any system component that is not
already assembled in the factory, must take place outside the product, at an appropriate
distance and check that its installation complies with all the regulatory requirements applicable
to flammable gas systems.
• The product is not an ATEX product.
It is the responsibility of the installer to verify the compliance of the product and its incorporation
in the system to european and national standards.
• In the case of components that must necessarily be installed inside the product, the compliance
of the final assembly is the responsibility of the installer. In particular:
- the use of any component, electrical or mechanical, which may be the origin of sparks or
flames, is forbidden. Only the exclusive use of components suitable for use in explosive
atmosphere (ATEX) is allowed.
- the use of components that may be cause of flammable gas leaks is forbidden.
- the installation of components of the refrigerant circuit is allowed only with permanent brazed
connection.

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Alfa LU-VE is a trademark registered and owned by LU-VE Group.
Alfa LU-VE reserves the right to change specifications without prior notification.
2 Product description
2.1 General information and application
Optigo SFMS is a commercial slim air coolers line suitable for the safe use of ASHRAE A2L
refrigerants. A2L refrigerants have a minimal impact on global warming and they will bring maximum
energy efficiency. So today, they are the best technological solution for air conditioning and
refrigeration applications, outside the natural refrigerants. General applications for Optigo SFMS are
in small to medium-sized cooling and freezing rooms. All SFMS models are characterised by a low
silhouette for the efficient use of cold room space.
• Refrigerants: A1, A2L
• SFMS31 capacity range (SC2 with R404):1.9 up to 10.6 kW
• SFMS31 air quantity: 920 up to 6,000 m³/h
2.2 Standard configuration
• High efficiency coil manufactured from internally grooved Cu tubes and aluminium fins.
Maximized performance thanks to the high capacity TURBOCOIL® heat exchanger
manufactured with internally grooved tubes and TURBOFIN® fins.
• Standard fin spacing: 4.5 and 7.0 mm.
• Optigo SFMS coolers are available with 1 to 4 fans fitted with EC fan motors blowing through
the coil. Fan diameter Ø 315 mm . Power supply 230/50-60/1. EC 2-speed fan motors, different
noise levels. Protection class IP54.
• Casing: galvanized steel casing powder coated RAL 9003 and aluminium drip tray.
• Dismountable and openable casing for cleaning purposes. SFMS31 units are provided with
separated hinges for drip tray and fan plate opening.
• Plastic drain connection.
• Fan motors wired to connection box.
• Fitted with schräder valve on the suction connection for testing purposes. Each heat exchanger
is leak tested with dry air and finally supplied with a dry air pre-charge.

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Alfa LU-VE is a trademark registered and owned by LU-VE Group.
Alfa LU-VE reserves the right to change specifications without prior notification.
2.3 Optional features
• Electric defrost (E)
For cold rooms with room temperatures below 4 °C frost build-up is likely, the application of
a defrosting system is recommended. The stainless steel defrost elements are connected
to dedicated terminal box. Certified for the use of the only A2L refrigerants listed on the IEC
standard 60335-2-40 (R-32, R-1234YF, R-1234ZE(E), R-444A/B, R-447B, R-451A/B, R-452B,
R-454A/B/C, R-455A) and A1.
• Drip tray heater (HD)
• Heavy electric defrost kit (EH)
Additional heaters for low temperature on air inlet side. Supplied as a separated kit for low
temperature applications.
• Coil protection: pre-coated aluminium fins (AP)
2.4 Code description
SFMS 31 E - 1 4 - 4 E - AL BO
1 2 3 4 5 6 7 8 9
1 Optigo A2L safety compliant slim commercial air cooler
2 Fan diameter (31=315 mm)
3 Fan motor type (E=EC)
4 Number of fans (1 to 4)
5 Coil type (1, 2, 3, 4)
6 Fin spacing (4=4.5 mm, 7.0 mm)
7 Defrost system (N=air defrost, E=electric defrost, HD=drip tray heater,
E+HD=electric defrost+drip tray heater)
8 Fin material (AL=aluminium, AP=pre-painted aluminium)
9 Packing (BO=box, BP=box + pallet, CR=crate)

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3 Product labels
Manufacturedby
SEST-LUVE-POLSKAsp.z.o. o.
ul.Wyczólkowskiego30,
44-109Gliwice,Poland
HEATEXCHANGER
FMS
CODE:
S/N:
PEDCATART4.3
Fluid:
VOLUME:
Ts
:
MaxPres:
VENTILATION
Nr
.Motors:
Power:
N°
N°
MADEIN
POLAND
DEFROSTING
②
①
Manufactured by
SEST-LUVE-POLSKA sp. z. o. o.
ul. Wyczólkowskiego 30,
44-109 Gliwice, Poland
HEAT EXCHANGER
SFMS
CODE: 10220733
S/N: 6449383/2020
PED CAT I
Fluid: A2L-A1 GROUP
VOLUME: 1.10
dm3
Ts: -40 °C +55 °C
Max Pres: 2.4 MPa
VENTILATION
Nr. Motors: 1
Power: 230 V 50 Hz
85 W 0.73 A
N°
N°
MADE IN
POLAND
DEFROSTING
EXAMPLE
EXAMPLE
1. Product label
This label is positioned inside the casing.
Model Refer to paragraph "2.4
Code description"
Product code
Product Serial nr.
Communicate these when
ordering spare parts as
they identify the unit
PED Category According to PED
Fluid Refrigerant
Volume Coil Volume
Ts Range of operating
temperatures for the coil
Max Pres Max working pressure
Nr Motors Number of fans
Product code
Product serial nr.
Fluid
Volume
Ts
Max Pres
Nr. Motors
PED category
Model
③
④

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Alfa LU-VE is a trademark registered and owned by LU-VE Group.
Alfa LU-VE reserves the right to change specifications without prior notification.
2. Electrical warning
Electrically powered component. Switch off
power supply before any maintenance or
installation activity.
3. Flammable gas
Use of flammable gas.
4. Refer to instruction manual
Manual must be carefully examined and
instructions should be followed up at all times.
4 Transport and storage
During transportation the heat exchanger must be handled with all required care. Any instruction or
warning signs attached to the heat exchanger or the packaging must be followed. Avoid shocks or
continuous vibrations during transport. These may cause damage to the product. If required, consult
Alfa LU-VE and disassemble during transport any parts that are likely to be set into vibration. Air
heat exchangers must be adequately fixed on the transport vehicle. If temporary storage of the heat
exchanger is required, the following points should be observed:
• Store the heat exchanger in its packing, in a dry place with sufficient protection against sun and
other environmental influences.
• Always place air heat exchangers on an even surface.
• Do not stack air heat exchangers unless explicitly indicated this is allowed.
• Storage temperature between -40 °C and +50 °C.
• Never open or remove the schrader valves. Overpressure in the coil must be maintained.
Shelf life of air coolers is one year. If longer storage periods occur, check:
• Proper functioning of the fan motor.
• Mounting brackets, lifting lugs and fan fixings for corrosion.
Optigo SFMS air coolers are delivered in a reinforced cardboard box. Handling and positioning can
take place manually. When more units are delivered in a single shipment, packed air coolers may
be stacked during transportation.
5 Unpacking and lifting
max 5
max 2
Respect the maximum number of stacked air
cooler units.

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Alfa LU-VE reserves the right to change specifications without prior notification.
Ensure that the cooler is not lifted directly onto
the drip tray or the finned coil. Utilizing the
proper wooden transport beams and/or pallets
prevents the cooler bending at the extremes
such that the cooling circuit or other components
are damaged.
Lift the unit to mounting position and secure
following instructions given in chapter "6
Installation". After having secured the cooler,
the forks may be lowered and the remaining
packaging materials can be removed.
Remove the cardboard box.
Place the unit on the ground. Unscrew the
fixings from the original support pallet and
manually turn the air cooler into mounting
position on a second wooden pallet. Keep the
packaging material in place to prevent the drip
trays from damaging.
The cooler is now in mounting position.

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Alfa LU-VE reserves the right to change specifications without prior notification.
A
B
666
353
636
10
20
"3/4 GAS
Model No. fans Coil type A (mm) B (mm)
SFMS31 1 1 826 592
SFMS31 1 2 826 592
SFMS31 1 3 1171 937
SFMS31 1 4 1171 937
SFMS31 2 1 1381 1147
SFMS31 2 2 1381 1147
SFMS31 3 1 1936 1702
SFMS31 3 2 1936 1702
SFMS31 4 1 2491 2257
SFMS31 4 2 2491 2257
6 Installation
6.1 Mounting dimensions
Coolers must be hung such that the coolers can contract and expand
somewhat. Cooler contraction occurs during refrigeration operation, and
cooler expansion occurs during defrost. For air coolers with copper tubing
this figure runs up to 1.65 mm per meter cooler length. All heat exchangers
must be set up level. Weight information are listed on the product label and/
or in the relevant product documentation.
Detailed drawings showing all required mounting and refrigerant connection
dimensions are available available for download on alfa.luvegroup.com.Dimensional drawings

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Alfa LU-VE reserves the right to change specifications without prior notification.
6.2 Mounting bracket
Use suitable studs when mounting the unit to the
ceiling.
Fix the unit to cold room ceiling by securely
tightening nuts and washers.
Ø 8 mm
6.3 Location and technical spaces
Heat exchangers should be positioned such that the following criteria are met:
• Adequate space must be left on the air inlet side of the heat exchanger. The air discharge side
should be free of restrictions. Recirculation of air is to be avoided.
• The heat exchangers should not be connected to ducting on either the air inlet side or discharge
side, unless the heat exchanger has been specifically designed for such an application.
• Adequate distance from heat sources.
• Adequate distance from sources of radio or electromagnetic emissions.
• Adequate space and illumination must be left for maintenance operations and personnel.
• Installation area free from oils, vapours and flammable gases.
• Installation surface shall support the weight of the unit and minimize vibration transmission.
• Weight information and dimensions are listed on the product label and/or in the relevant product
documentation.
• Do not obstruct passageways or doors.
• Coolers must be hung such that the coolers can contract and expand somewhat. Cooler
contraction occurs during refrigeration operation, and cooler expansion occurs during defrost.
For air coolers with copper tubing this figure runs up to 1.65 mm per meter cooler length. All
heat exchangers must be set up level.
• Hazards, position of controls and switch must be correctly signalled. Controls and switch must
be positioned so that they are easily accessible and manageable.
It is important to remember that the total amount of heat to be dissipated depends on receiving
the full design air volume at the design entry air temperature which allows this air to be freely
discharged after passing through the heat exchanger. Any restrictions may impair the performance
of the cooler. If in doubt, please check with Alfa LU-VE.
> 100 mm

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Alfa LU-VE reserves the right to change specifications without prior notification.
6.4 Refrigerant connections
Do not adapt headers position to the suction line.
All pipework and connections must be made in accordance with good refrigeration design and
installation practice.
Before performing the connection, ensure that no flammable gas is present in the system and in the
product.
Ensure that no stresses are transmitted to the pipework. All pipework should be
adequately attached to the walls/ceilings of the cold room and not only to the cooler itself. Pipework
must be adequately supported to prevent vibration or external load on the cooler headers, etc.
Ensure the supply circuit is closed (no pressure) before connecting the suction lines.
Ensure the flame nozzle is not aimed at the equipment, when welding. Insert a protection shield if
required.
TeTs1 Trs
Ts1=cold room air inlet temperature.
Te=evaporating temperature. It is related to the
refrigerant pressure on the unit cooler outlet.
Trs=refrigerant superheat temperature, on
suction line near thermostatic valve bulb.
(Trs-Te)=superheat
(Trs-Te)≤0.7x(Ts1-Te)
Keep the superheat as low as possible to obtain
maximum unit cooler performance.
The thermostatic valve fitted must be correctly
sized for the installation conditions and adjusted
for correct system operation.
6.5 Pressure test

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Alfa LU-VE reserves the right to change specifications without prior notification.
6.6 Drain line
Check all drain lines and drip trays to ensure that no improper material such as, e.g., packaging
material blocks the drain.
Connect the drain tubing to the drain connection.
60°
Tighten drain connection by hand only.
The drain line diameter must be at least the size
of the drip tray drain diameter and should be laid
with an adequate slope. For room temperatures
below 0 °C drain line insulation and defrosting
are required.
A syphon must be installed on the drain line,
outside the cold room.

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6.7 Electrical connections
The heat exchanger shall be installed in conformance with the recognized national standards of
electrical and refrigeration installation practice. The site supply voltage, frequency, accepted power
rating and number of phases must comply with the details on the technical documentation. All
electrical supply lines must be connected to the terminal boxes through suitable waterproof glands
using bottom entry or, in case of horizontal installation, the cable is routed to form a water trap. Be
sure to provide grounding incorrect grounding can cause eletric shock.
If the heat exchangers are installed and there is to be an appreciable delay in putting the plant into
operation, a temporary electrical supply should be connected to each motor, sufficient to run for
at least 4 hours. This procedure should be carried out at least once every 4 weeks, until the heat
exchanger is fully operational. It is up to the end user to verify the conditions for protection by
automatic disconnection of supply, according to applicable standards. Heat exchangers are
designed for TN power systems. The insulation fault protection must be part of power supply of the
heat exchanger and is not supplied by the manufacturer.
The following data determine which connection diagram is to be selected and respected for
electrical installation:
• Heat exchanger model indication
• Fan motor type
• Electrical options
When in doubt always contact your local supplier or Alfa LU-VE representative for assistance.
Ensure complete electrical isolation before performing any wiring.
Remove the side panel. Follow the instructions
as given in chapter "7.6 Side panels opening".
Insert the cables into the grommet and block
them with their respective gland.
Connect terminals by following the wiring
diagrams on the cover. When all connections are
made refit the terminal block cover.
For systems using electrical defrost termination
thermostat should be used, having a range of
10 °C to 20 °C with a sensor attached to the top
return bends of the coil block or buried in the top
of the coil block fins. Differential protections and
circuit breakers are not included in the scope of
supply.
Use only ATEX certified thermostat, for use in explosive atmosphere.
Any electrical component not supplied with the appliance must be installed outside the unit.
6.8 Power failure
In order to avoid damage to the compressor, the refrigerant supply must be closed in the event of
power failure, e.g. by closing the magnetic valve. Safety measures elsewhere in the system will
prevent the pressure in the heat exchanger from exceeding the design pressure.
side panel
grommet

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6.9 Fan motors connections
The maximum load of the motors and the recommended settings for the overload relays are to be
respected. The electrical control circuit should be arranged with a manual reset device in order
to prevent continuous on/off switching (tripping) of the motors. Suppliers and manufacturers of
electrical motors provide no guarantee for motors that are combusted through overload.
Ensure complete electrical isolation before performing any wiring.
EC motors:
Type Power supply Fans Ø (mm) rpm Speed Motor power consumption
x 1 fan
EC 1~230 V - 50/60 Hz 315 950 low 28 W 0.26 A
EC 1~230 V - 50/60 Hz 315 1300 high 73 W 0.6 A
EC FANS
SPEED SELECTION
6.10 Defrost
Always refer to the electrical scheme for both connections and nominal voltage of the electrical
defrost option. Ground cable must always be wired and connected to the appropriate terminal in
the connection box. Always refer to the electrical scheme order to identify the ground terminal.
Installation of a switch for defrost line is mandatory and is the responsability of the installer.
Warning about the neutral wire: it must be connected if indicated in the electrical scheme. It must
not be connected if it is not shown in the electrical scheme.
Coolers without defrosting facilities may not be used in room temperatures below +2 °C.
If the cooler is working on a time termination cycle, it is suggested that an initial defrost period be
set at 35 to 45 minutes (in combination with the number of defrost periods). This setting is to be
refined through trial and error, according to the actual defrost requirements depending on cooler
model, size, and working conditions. If the defrosting cycle is terminated via a temperature sensor,
close attention must be taken in positioning the thermostat sensor. The temperature sensor is
usually set at a value between 10 °C and 15 °C. In general it should be positioned where the last
traces of frost disappear, usually on the coil.

31599313EN-03
19
Alfa LU-VE is a trademark registered and owned by LU-VE Group.
Alfa LU-VE reserves the right to change specifications without prior notification.
DE=electric defrost (E)
EB=drip tray heater (HD)
EH=heavy electric defrost (EH)
At room temperatures of around 0 °C the last frost is usually in the top of the coil block. At room
temperatures below -20 °C, this is the consequence of the so-called 'chimney effect', usually in the
lower half of the coil block at approx. ¼ of the fin height. Unfortunately a number of factors (cooler
position relative to an access door or stored products, precise setting of the thermostatic expansion
valve, etc.) may cause identical coolers to perform differently. Thermostat sensors should NOT be
placed in the direct vicinity of a heater element. The final position of the temperature sensors must
be determined through trial and error.
Model No. fans Coil type
E
no. rows V W
SFMS31 1 1 1 4 230 800
SFMS31 1 2 1 6 230 1200
SFMS31 1 3 1 4 230 1250
SFMS31 1 4 1 6 230 1900
SFMS31 2 1 1 4 230 1500
SFMS31 2 2 1 6 230 2300
SFMS31 3 1 1 4 230 2250
SFMS31 3 2 1 6 230 3400
SFMS31 4 1 1 4 230 3000
SFMS31 4 2 1 6 230 4450
6.11 Electric defrost (E)

31599313EN-03
20
Alfa LU-VE is a trademark registered and owned by LU-VE Group.
Alfa LU-VE reserves the right to change specifications without prior notification.
6.12 Drip tray heater (HD)
Model No. fans Coil type
HD
no. V W
SFMS31 1 1 1 230 200
SFMS31 1 2 1 230 200
SFMS31 1 3 1 230 315
SFMS31 1 4 1 230 315
SFMS31 2 1 1 230 385
SFMS31 2 2 1 230 385
SFMS31 3 1 1 230 580
SFMS31 3 2 1 230 580
SFMS31 4 1 1 230 775
SFMS31 4 2 1 230 775
6.13 Heavy defrost kit (EH)
Supplied as a separated kit for low temperature applications.
Model No. fans Coil type
EH
no. V W
SSFMS31 1 1 1 230 450
SFMS31 1 2 1 230 450
SFMS31 1 3 1 230 670
SFMS31 1 4 1 230 670
SFMS31 2 1 1 230 800
SFMS31 2 2 1 230 800
SFMS31 3 1 1 230 1150
SFMS31 3 2 1 230 1150
SFMS31 4 1 1 230 1500
SFMS31 4 2 1 230 1500
For mounting procedure please refer to "7.10 Heavy defrost kit (EH) mounting".