Metos Master HOOD 130 LUX II Specification sheet

Instructions for Use and Maintenance
COD.: 5250E_U Ed. 01 - 01/2021
(15.4.2020)
HOOD TYPE DISH WASHER
Metos Master HOOD 130 LUX II
4246468, 4246468N, 4246469, 4246469N, 4246470. 4246470MK, 4246470MM, 4246470MN
Manufacturers original documentation

Thank you for choosing our machine.
The instructions for installation, maintenance and use found on the following pages have
been prepared to ensure a long life and perfect operation of your unit.
Please, do follow the instructions carefully.
We have designed and built this machine using the latest innovative technologies. Now
you shall take good care of it.
Your full satisfaction is our greatest reward.
READ THESE INSTRUCTIONS CAREFULLY BEFORE INSTALLING THE MACHINE.
WARNING: FAILURE TO COMPLY, EVEN PARTIALLY, WITH THE PRESCRIPTIONS IN THIS MANUAL
WILL RENDER THE PRODUCT WARRANTY NULL, AND THE MANUFACTURER SHALL NOT BE
LIABLE.

EN
page 31
CONTENTS Page
WARNINGS 33
1. MACHINE DESCRIPTION 35
1.1 Machine Description 35
1.2 Machine features 36
1.3 Dataplate 36
2. CONTROL PANEL AND RELATIVE SYMBOLS 37
2.1 Keys 37
2.2 Display 37
3. OPERATION 38
3.1 Machine start-up 38
3.1.1 Start-up 38
3.1.2 Start the wash cycle 38
3.1.3 Switching OFF 39
3.2 Cutlery and crockery loading 40
3.3 Detergent use 40
3.4 Rinse aid use 41
3.5 Drain pump system 42
3.6 Regeneration device (optional) 42
3.7 Extra cold rinse function (optional) 43
WARNINGS 44
4. ECOLOGICAL ASPECTS 45
4.1 Recommendations for optimal use of energy, water and additives 45
5. H.A.C.C.P. AND HYGIENE REGULATIONS 45
6. MAINTENANCE 46
6.1 Routine maintenance 46
6.2 Extraordinary Maintenance – by qualified Service Personnel only 46
7. MACHINE INSTALLATION 47
7.1 Handling 47
7.1.1 Handling the product 47
7.1.2 Storage 47
7.2 Prepare for installation 47
7.2.1 Room features 47
7.2.2 Electrical connection - Characteristics 47
7.2.3 Water supply connection - Characteristics 48
7.2.4 Water supply characteristics 48
7.2.5 Steam evacuation 48
TRANSLATION OF THE ORIGINAL INSTRUCTION

EN
page 32
7.3 Installation 49
7.3.1 Positioning the machine 49
7.3.2 Electrical connection 49
7.3.3 Water connection 49
7.3.4 Start-up 49
8. SIGNALS AND ALARMS 50
8.1 Signals 50
8.2 Alarms 50
9. ENVIRONMENTAL ASPECTS 55
9.1 Packaging 55
9.2 Disposal 55
10. TROUBLESHOOTING 55
11. EU DECLARATION 57

EN
page 33
WARNINGS
This instructions booklet must be kept with the machine for future
consultations. If the machine is sold or transferred to other users, make
sure the booklet always goes with the unit so that the new owner can
have all the necessary information on operations and all relevant instructions.
The instructions booklet must be carefully read before installation and before
starting the machine.
• Adaptation of the electrical and water systems for dishwasher installation must
only be carried out by qualified operarators.
• The user shall not carry out any repair and/or maintenance operations. In any case
contact qualified personnel.
• Only qualified personnel can access the control panel, when the main power switch is
OFF.
• Servicing of this machine must be performed by authorized personnel only.
N.B.: Use genuine spare parts only. Non-genuine parts will void the warranty and
the manufacturer will take no responsibility for any damage.
• Do not use old load pipe, but only new ones.
• Follow the instructions given in the manufacturer’s booklet for cleaning operations (chap. 9).
• This machine must only be used by adults. This is a professional machine to be used by
qualified personnel, installed and repaired exclusively by qualified Technical Personnel.
The Manufacturer declines any responsibility for improper installation, use, maintenance
or repair.
• This appliance can be used by trained youth aged from 15 years and above. It cannot
be used by persons with reduced physical, sensory or mental capabilities or lack of
experience and knowledge.
• Children shall not play with the appliance.
• Cleaning and user maintenance shall not be made by children without supervision.
• This machine must be disconnected from the main electrical supply after use
at the end of the day and for any service/maintenance operation following this
procedure:
Switch the machine off from the control panel.
Drain the tank.
Disconnect the electrical supply by the omni-polar switch (main switch located
on the wall).
Shut the water supply valve(s).
Disregarding the aforesaid prescriptions is a serious misuse and can cause
damages and injures to property and people, and will relieve the manufacturer
from whatever liability.

EN
page 34
ATTENTION: DO NOT INSERT HANDS AND/OR TOUCH THE PARTS
LOCATED AT THE BOTTOM OF THE WASH TANK AND/OR AT THE END
OF THE WASH CYCLE.
ATTENTION: INTERNAL CLEANING OF THE MACHINE SHALL BE
CARRIED OUT AT LEAST 10 MINUTES AFTER THE POWER SWITCH HAS
BEEN TURNED OFF.
NOTE: The manufacturer declines any responsibility for accidents to people or any
damage deriving from failure to observe the above listed instructions.

EN
page 35
1. MACHINE DESCRIPTION
1.1 Machine Description
Wall-hung main power
switch: at installation
serviceman supply and
care, according to local
laws
Standard equipment:
nr. 2 plates racks
Capacity per plate rack:
12 soup plates or
18 flat plates
Standard equipment:
nr. 1 glasses rack
Standard equipment:
1 cutlery basket
Optional:
Heat recovery system
Optional:
Water softener
Hood
Control panel
Optional:
Probe lack
detergent/rinse aid

EN
page 36
To operate the Hood machine, 3 connections are needed:
• Electrical;
• Water supply;
• Water drain.
This is a cycle machine comprising a 60°C wash cycle with detergent, a 82°C rinse cycle with injection of rinse-aid. 50x50
cm racks are used.
The machine can be complemented with wash-tables, rinse-showers and dedicated waste collection systems.
A new wash cycle can be started by closing the hood down.
The optional heat recovery system reduces significantly the humidity in the dishwashing-room, recovering the energy that
is wasted from the roof, by condensation, by reducing the steam when the hood is opened.
1.2 Machine features
The machine’s sound level is Lpa = 66,4dBA ± 0,7dB(A)**
**test made according to EN 60335-2-58/A11
1.3 Dataplate
A Power source
B Total power installed
C Dynamic pressure
D Envelope protection degree
E Total electricity absorption
S/N DW X xxxxxxx
ANNO
YEAR
ANNÉE
AÑO
JAHR
NUMERO DI SERIE
SERIAL NUMBER
NUMÉRO DI SÉRIE
NUMERO DI SERIE
SERIENNUMMER
N=2017 - 2018
O=2018 - 2019
P=2019 - 2020
Q=xxxx - xxxx
Model DW XXXX
FAMIGLIA PRODOTTO
FAMILY PRODUCT
FAMILLE DU PRODUIT
FAMILIA PRODUCTO
FAMILIE DES PRODUKTES
Model S/N
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ModelS/N
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EN
page 37
A) Switching – On / STAND BY key
B) Regeneration key (optional)
C) Drain key
D) Not available key
E) Info key
F) START key to start up cycle / select cycle
G) Display
2.2 Display
2. CONTROL PANEL AND RELATIVE SYMBOLS
2.1 Keys
A FB
CE
G D
55°C
P1
70°C
The display's indications, when machine ready, are listed below:
1) Tank status icon. If the letter Tis red the heating element is ON.
2) Tank temperature
3) Boiler temperature
4) Boiler status icon. If the letter Bis red the heating element is ON.
5) Cyle Code
6) Cycle Name
7) Cycle Icon

EN
page 38
3. OPERATION
3.1 Machine start-up
3.1.1 Start-up
• Check if the pump suction filter is properly inserted in its seat in the wash-tank bottom
(see pict. 1).
This filter must be cleaned every 20 wash-cycles or whenever necessary.
DO NOT use the appliance without the filters.
• Put the surface filters in place (see pict. 1).
• Shut the machine hood.
• Turn the water valve “open”.
• Turn the main power switch ON.
• The machine is on STAND-BY. In the G display are shown: the symbol , the date and
time and a possible notice of operations to be carried out by the user.
The key Aturns red. The key Cturns blue. If the machine is provided with the Water Softener
optional also the key B turns blue.
• Press and hold the key A. The key Aturns green.
• For the first 4 seconds the key Start F turns green and on the display Gappears the last
cycle carried out before switching the machine off. During this time it is possible to pre-
select the cycle to start washing.
Keep pressed the key Start F to scroll the available cycles' list, until the desired one appears. Release the key. This function
allows to save time in start-up phase if a cycle with lower operating temperatures is selected (i.e.: Rinse 70°C instead of
82°C). The key Start F turns red.
• If the tank was not drained after the previous use or if the tank water temperature is below 50°C, the machine proceeds
with a tank draining. In any case remember that if the machine is not used the tank must be drained (see WARNINGS).
Even if the tank is empty the draining pump runs for a few seconds to eliminate any water residual.
• The machine proceeds to tank filling and heating, by steps. The display Galternatively shows the messages FILLING
WATER and HEATING.
By pressing the key Info E it is possible to display the tank and boiler temperatures.
The machine is ready to wash when both tank and boiler are filled and the set temperatures are reached.
3.1.2 Start the wash cycle
• Insert the rack filled with dishes to wash (see paragraph 3.2). The plates must be correctly placed in the rack.
• If the desired cycle hasn't been selected before, it is possible to do it in this moment by keeping press the key Start F.
The display will show in sequence all these available programs.
Once the wanted program is displayed, do release the button.
Available programs:
pict. 1
Cycle
Code
Cycle name Icon Total time* Note
P0 CUSTOM ** Partial drain cycle with adjustable time
and temperatures
H+ HYGIENE PLUS 620"
*** Partial drain cycle with wash temperature
at 65°C and rinse temperature at 87°C
P1 SHORT WASH PROGRAM 50"
Partial drain cycle with rinse temperature
at 82°C
P2 MEDIUM WASH PROGRAM 90"
P3 LONG WASH PROGRAM 120"
P4 INTENSIVE WASH PROGRAM 180"
P5 XX INTENSIVE WASH PROGRAM 300"
*The indicated time is valid only if the machine has reached the boiler temperature set (except the H+ cycle).
**The cycle P0 is a customizable cycle according to the user’s needs, to be set by a technician during the machine
installation.
*** In the H+ cycle, the indicated time is valid only if the tank and the boiler have reached the preset temperature.

EN
page 39
If enabled, a buzzer signals the end.
Keep the hood closed in order to avoid and reduce cooling down during stand-by periods.
Note: At cycle-end, keeping the hood closed, dishes will not dry. Take out the rack or keep the hood open to allow evaporation,
helping the drying of the dishes.
Note: We recommend to change the tank water, by means of another filling, at least twice a day, or whenever needed.
The machine is set to change all the wash-water automatically, every 100 cycles.
3.1.3 Switching OFF
• Keep pressed the key Auntil it lights in red.
• Drain completely the wash tank by pressing the key Cwhich activates the drain pump (see paragraph 3.5).
• At the end of the day, clean the machine (see chap. 6 Maintenance).
• Shut the water valve.
• Switch the main power switch OFF.
• Close the hood; the wash cycle starts automatically. To restart a suspended wash cycle, press the key Start F.
The display shows a percentage indicating the cycle progress. On the lower part of the display is shown the phase of the
cycle (wash, drain or rinse). The key Start F turns blue.
If the hood is open, the key Start F lights in red and the cycle can not be started. By pressing the key Start F the display
indicates DOOR OPEN.
• Keep pressed the key Start F for about 2 seconds to stop the cycle.
The percentage is reset if the cycle is stopped.
• At the end of the cycle the key Start F alternatively flashes in blue/green. The display shows the 100% value and, the
message CYCLE ENDED on the lower part.
55°C 70°C
Cycle ended
55°C 70°C
Washing

EN
page 40
3.3 Detergent use
The machine has a standard detergent dispenser. The machine automatically sucks the detergent.
The detergent shall be the NO FOAM type, suitable for industrial dishwashers.
The use of good quality liquid detergents is recommended.
Follow the manufacturer’s recommendations for chemical dosage, related to the local water hardness.
A correct amount of detergent is very important for a successful wash.
Should the detergent lack, the display shows DETERGENT LEVEL (only with optional "Sensor for Chemicals Low Level").
A buzzer sounds at one minute intervals.
We recommend to buy exclusively crockery and cutlery suitable for dishwashing.
After several washes, the glass can become opaque.
It is mandatory to repeat the washing cycle if at the end of the cycle the crockery are not well clean or if
there are washing residues (glasses, cups, bowls, etc. with liquid inside).
3.2 Cutlery and crockery loading
Before cutlery and crockery loading in the machine, coarsely clean them from the leftover food.
It isn't necessary to rinse the cutlery an crockery under water.
ATTENTION: Do not wash articles polluted with petrol, paint, chips of steel or iron, ash,
sand, wax, lubricant grease. These substances damage the machine. Do not wash fragile
objects or material not resistant to the washing process.
Note the following recommendations:
• Crockery and cutlery should not be inserted inside one another, covering each other.
• Place the crockery in order to all surfaces can be reached by water; otherwise the dishes are
not washed.
• Make sure all the crockery are in a stable position and that the hollow containers don't overturn
(cups, glasses, bowls, etc.) .
• Place in the rack all the hollow containers such as cups, glass, etc. upside-down.
• Place the crockery with deep hollow with upper face downwards, so that water can flow out.
• Make sure the smaller crockery do not fall from the rack.
• Check all the wash arms runs freely and they are not blocked by too tall or too prominent
crockery. Eventually, run a manual rotation of the arms to check it.
Some foods, such as carrots, tomatoes, and others, may contain some natural dyes substances,
that in large amounts, can alter the crockery and plastic parts colors.
Any discoloration does not mean that the plastic is not heat resistant.
Crockery and cutlery not suitable for dishwasher
Not suitable for dishwasher:
• Wooden crockery and cutlery or with wooden parts; water at high temperature causes
deformation to wood. Also the adhesives used are not suitable for treatment in the dishwasher;
a consequence could be the handles detachment.
• Crafts, precious vases or decorated glasses.
• Not heat-resistant plastic crockery.
• Copper, brass, pewter or aluminum objects: they may become discolored or opaque.
• The decorations on glass, after a certain number of washes, can lose gloss.
• Fragile glasses or crystal items, if often washed, can become opaque.
WARNING
DETERGENT
LEVEL
pict. 2
pict. 3

EN
page 41
3.4 Rinse aid use
The machine has a standard rinse aid dispenser. The machine automatically sucks the product.
The rinse-aid chemical, shall be suitable for professional glass and dishwashers. It is advisable to rely on specialized retailers
in the sector.
Should the detergent lack, the display will show RINSE-AID LEVEL (only with optional "Sensor for Chemicals Low Level").
A buzzer sounds at one minute intervals.
WARNING
RINSE AID
LEVEL
By pressing the key Info E the display goes back to machine ready status. The signal becomes scrolling in the display’s
lower part alternatively to the cycle name.
The signal remains until the detergent tank is refilled.
55°C
P1
70°C
DETERGENT LEVEL
55°C
P1
70°C
RINSE AID LEVEL
By pressing the key Info E the display goes back to machine ready status. The signal becomes scrolling in the display’s
lower part alternatively to the cycle name.
The signal remains until the detergent tank is refilled.

EN
page 42
3.5 Drain pump system
The machine is standardly equipped with a drain pump. It regulates the tank water level during wash cycles. At the end of
the working day it drains the tank.
To proceed with a draining, both with machine ON and stand-by mode, press the key Cuntil the display shows the message
TANK DRAINING.
If needed, the cycle can be activated even during the wash-tank loading. If the activation happens during the wash-cycle,
this will be elongated.
The circuit board is programmed to call periodically for a 20 minutes manual complete regeneration cycle. When the display
shows PRESS WATER SOFTENER REGENERATION KEY (scrolling message at the bottom of the display) start the
following procedure:
• To start a complete regeneration cycle, with the machine in STAND-BY mode and the hood shut, keep pressed the key
Bfor about 3 seconds. The key Start F is blue and flashes.
• During the cycle the display shows the cycle phases and the percentage indicating the cycle progress.
• This cycle cannot be interrupted and the normal operation is inhibited.
• At the cycle end, the machine switches in STAND-BY mode, automatically.
Note: To carry out a correct regeneration cycle it necessary the salt container inside the tank has salt in it. In case of salt
lacking the user is advised with the message SALT LEVEL and a buzzer sounds at regular intervals.
TANK DRAINING
With the hood closed, the key Start F is blue and flashes.
After the draining is complete, the machine will turn automatically in STAND-BY mode.
3.6 Regeneration device (optional)
Should the machine be equipped with a water-softener circuit, this will be fully automatic.
When needed, a 120” regeneration cycle will automatically activate. During this phase, the display will show the letter R (at
the bottom, on the right side).
55°C
P1
70°C
GLASSES - SHORT R
WARNING
SALT
LEVEL

EN
page 43
55°C
P1
70°C
GLASSES - SHORT
By pressing the key Info E the display goes back to machine ready status. The signal becomes scrolling in the display’s
lower part alternatively to the cycle name.
The signal remains until the salt container is refilled.
55°C
P1
70°C
SALT LEVEL
To add salt, open the machine hood and unscrew the salt container plug inside the tank.
Fill the special container with specific coarse salt for regeneration (1-4 mm), being careful not to spill it into the tank. A strong
concentration of salt can negatively affect the correct functioning and service life of the machine and generate rust and the
steel corrosion. After filling with salt, lock the plug tightly.
In case of water hardness above 35°f an external water softener is recommended.
3.7 Extra cold rinse function (optional)
Should the machine be equipped with a Extra cold rinse (optional) feature, and it is enable, after the normal rinse cycle an
extra cold rinse is made for about 10 seconds with tap water.
To start the optional cycle, with machine ON, press the key D.
The display shows the relative symbol .
The optional cycle is active until the key D is pressed again. At this moment the icon disappears.

EN
page 44
WARNINGS:
• Do not slam the hood when opening and closing.
• Do not put material or objects on the machine.
• The machine has an IP (see serial number label on the machine) protection rating against accidental water splashes
and is not protected against pressurized water jets. Pressure-cleaning systems shall, therefore, not be used on this
machine.
• Do not dip bare hands into water containing detergent. If this should occur, wash them immediately with plenty of water.
Check the safety instructions on the detergent container.
• Some important rules must be followed for using this appliance:
1) never touch the appliance with wet hands or feet;
2) never use the appliance when barefooted;
3) do not install the appliance in places exposed to water splashes.
• This machine must be disconnected from the main electrical supply after use at the end of the day and for any
service/maintenance operation. Switch off the main switch located on the wall, which shall be installed by a
professional installer. Shut the water supply valve(s).
• Do not cover the intake or dissipation grids.
• Do not use water to extinguish fires on electrical parts.
WARNING: INTERNAL CLEANING OF THE MACHINE SHALL BE CARRIED OUT AT LEAST 10 MINUTES AFTER
THE POWER SWITCH HAS BEEN TURNED OFF.
WARNING: DO NOT INSERT HANDS AND/OR TOUCH THE PARTS LOCATED AT THE BOTTOM OF THE WASH
TANK AND/OR AT THE END OF THE WASH CYCLE.

EN
page 45
4. ECOLOGICAL ASPECTS
4.1 Recommendations for optimal use of energy, water and additives
Salt dosing: A pre-set (by the manufacturer) quantity of salt is injected in the resins at each regeneration cycle. It
is important to observe the number of regeneration cycles recommended in paragraph 3.6 Regeneration device
in order to avoid salt spills or lime deposits.
Use the machine fully loaded when possible: This shall prevent detergent, rinse aid, water and energy consumption waste.
Detergent and rinse-aids: Use detergents and rinse-aid chemicals with high biodegradability, to best respect the environment.
Verify proper dosage in relation to water hardness at least three times a year. Excess product pollutes rivers and seas while
an insufficient dose results in unsatisfactory dish washing and/or hygiene.
Boiler and Wash-Tank temperatures: The boiler and tank temperatures are set by the manufacturer in order to obtain the best
washing results with detergents on the market. The temperatures can be reset by the installer in relation to your detergent.
Pre-washing: Carefully pre-wash with a moderate amount of water at room temperature to facilitate the removal of animal
fats. To remove encrusted materials warm water soaking is recommended.
Note: Wash objects as soon as possible to avoid deposits from drying and compromise effective washing.
For effective washing routine dishwasher cleaning and maintenance is advised (see chap. 6).
Disregarding the points listed above and of any the information contained in this manual can cause energy, water
and detergent waste with a subsequent increase in running costs and/or performance reduction.
5. H.A.C.C.P. AND HYGIENE REGULATIONS
• When starting the machine ON, no wash-cycle will be starting until the set boiler and wash-tank temperatures are reached.
During operation, the machine will not start the rinse cycle till the set boiler temperature is reached.
• Remove carefully all solids from the objects to be washed, to avoid obstruction of filters, nozzles and piping.
• Drain the wash tank and clean the filters at least twice a day.
• Check if the detergent and rinse-aid dosage are correct (as recommended by the manufacturer). In the morning, before
starting the machine, check that the quantity of chemicals in the canisters is enough for daily supply.
• Keep your working tables clean.
• Extract the rack with clean hands or gloves to avoid finger marks.
• Do not dry or polish the washed objects with cloths, brushes or rags that are not sterile.

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6. MAINTENANCE
6.1 Routine maintenance
WARNING: The machine is not protected against pressurized water jets. Do not use pressure cleaning
system against the machine.
It is recommended to contact the seller of chemicals for proper cleaning instructions, in order to have
detailed indications on methods and products for the correct periodical machine sanitation.
Do not use bleach or chlorine based detergents.
Daily cleaning is needed to ensure that the machine runs perfectly. The following shall be carried out:
• Turn the machine in STAND-BY mode, by pressing the button A(see chap. 2).
• Remove the surface filters and clean them under running water. Drain the sump water (see paragraph 3.5).
• Remove the pump filter and clean with a brush and a water shower (see pict. 4).
• Remove the arms by loosening the fixing screws, and thoroughly clean them, and the wash and rinse slots under running
water (see pict. 4).
• Reassemble the parts and reposition the wash pipes firmly in place.
• Clean the tank very carefully, using a water shower.
• It is suggested to leave the hood of the machine open at the end of the day.
Automatic cycle of machine self-cleaning/rinsing: recommended at each day end.
Machine in STAND-BY mode,the scrolling message SELF-CLEANING: REMOVE FILTERS AND PRESS START appears
on the lower part of the display.
Remove the filters.
Shut the hood.
Self-cleaning
Push the button Start F. A wash chamber and heat recovery (if present) automatic
self-cleaning cycle will start, after this the machine will be in STAND-BY. The
message SELF-CLEANING CYCLE OVER appears.
• Shut the water valve.
• Turned the machine offby switching the main power switch OFF.
Note: This operation allows the complete draining of the boiler, in order to remove
any air bubbles, which may cause malfunctions.
6.2 Extraordinary Maintenance – by qualified Service Personnel only
Once or twice per year, the machine should be checked by qualified Service Personnel:
1 Clean the intake filter of the solenoid valve
2 Remove scaling from the heating elements
3 Check the status and the tightness of all gaskets
4 Check the perfect state and/or wear of the components
5 Check the efficiency of the dispensers
6 Tighten firmly all electrical connections.
pict. 4

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page 47
7. MACHINE INSTALLATION
7.1 Handling
7.1.1 Handling the product
The machines must be handled strictly as shown in pict. 5 regarding the
grip points indicated for lifting with a lift truck.
Latch the machine in a way that secures no vibration or shocks during
transportation.
N.B.: Slinging with ropes not recommended.
After unpacking, make sure the appliance has not been damaged due to
transportation. If it has been, do notify the seller about this problem. If the
damage might question the machine’s safety, do not install the appliance.
Double check the firm tightness of all hose-clamps on piping, nuts and bolts, and fasteners, that might come loose
with the transport, to prevent water dripping or leakages, or other damages, during the machine's operation.
See chapter 9 ENVIRONMENTAL ASPECTS for disposal of the packing material.
7.1.2 Storage
Storage temperature: min. +4°C - max +50°C - humidity <90%.
The stored parts should be checked periodically, to detect any sign of deterioration.
Do not put anything on the machine, even if packed in its box.
7.2 Prepare for installation
This is just a guide-line for the machine installation.
The installation must be performed by a qualified engineer.
7.2.1 Room features
Install the machine, in a room closed to weather and with a guaranteed temperature-range between 5 and 35°C.
The machine is equipped with thermostatic sensors to manage the temperatures. To guarantee a proper functionality these
sensor shall not operate at a room temperature below 5°C.
For this reason, it is fundamental that before starting the machine reaches the room temperature.
7.2.2 Electrical connection - Characteristics
The electrical connection to network shall be carried out in accordance to the local laws in force.
Make sure that the supply voltage is the same as reported on the machine plate and that the network can stand the needed
power absorption shown on the same plate.
pict. 5
WARNING: check very carefully if the “ground connection” of the machine, is properly sized and fully efficient,
and that not too many units are connected on it. An undersized or poor “ground connection” might lead to
corrosion and/or pitting effect on the stainless steel plates, even to perforation.
A suitable omni-polar one-way switch shall be installed and sized according to the absorption provided,
in order to completely guarantee the disconnection from the supply mains, under “category III”
overvoltage conditions.
This switch shall be included in the power network solely and exclusively used for this purpose and
installed in the immediate vicinity of the machine.
Always turn the machine off via this switch. This is the only model of switch that guarantees a total
electrical power disconnection.
Make sure that the facility is equipped with efficient ground connection.

EN
page 48
7.2.3 Water supply connection - Characteristics
Fresh water supply features:
*Should the water supply pressure be more than 400 kPa, a pressure reducer must be installed (only for those versions
where it is not a standard supply, already).
**It is compulsory to install a water-softener, in case of water with average hardness above 8°f. Washed objects will
be cleaner and the machine will last much longer.
The machine can be equipped with a water softener, on request. If the machine is equipped with a water-softener, a
regeneration of the resins shall be done on regular basis (see par. 3.6 Regeneration device).
N.B.: Any damage caused by limestone (calcareous water higher-up than 8°f and without water-softener) will not be covered
by warranty.
A periodical check of the supplied water hardness is highly recommended.
***The machine must be supplied with cold water, if equipped with the Heat Recovery System (min 5°C - max 15°C).
Machines shall be made with extra power in case of cold water infeed.
****The water supply temperature shall never exceed 55°C.
The drain tube shall always be connected to a siphon in order to prevent the release of odors.
Maximum drain height = cm. 50.
7.2.4 Water supply characteristics
The machine water supply must be potable, in compliance with Directive 98/83/EC.
The inlet water must also meet the parameters given in the table 2.
1Out of range values might lead to corrosion and jeopardize the life of the machine.
2Should the water hardness is higher it is compulsory to install a water softner and check periodically its operation.
3Out of range values might lead scaling and sediments with a consequent lower performance, functionality, and expected
life of the machine.
4Desired value: Out of range values might lead stainless steel blackening/tarnishing.
5For machines equipped with Heat Recovery System.
It is recommended a water test once a year.
7.2.5 Steam evacuation
In accordance with regulations of environmental hygiene, for the proper functioning of the machine and a healthy environment
for the operator who working in there, it should be at least 10 air volume changes per hour in the room where the machine
is installed.
For small wash rooms we recommend at least 15 air volume changes per hour.
Table 1
Water characteristics table Min Max
Static Pressure 200Kpa 400Kpa
Dynamic Pressure* 150Kpa 350Kpa
Water hardness** 2°f 8°f
Cold water-supply temperature*** 5°C 50°C
Hot water-supply temperature**** 50°C 60°C
Capacity 10l/min
Water parameters table Min Max
Chlorine 12mg/l
pH 6,5 18,5 3
Water hardness 8°f 2-3
Iron 30,2 mg/l
Manganese 40,05 mg/l
Conductivity 5200μS/cm
Table 2