Mitsubishi Electric x-MEXT Instructions For Installation, Use And Maintenance Manual

Air conditioners for it cooling

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Air conditioners for IT Cooling

x-MEXT

INSTALLATION, USE AND MAINTENANCE MANUAL

Italian is the original language.

The other languages versions are translation of the original.

To ensure safe and correct use, carefully read this manual and make sure to understand all the contained indications

and information.

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Summary of Contents for Mitsubishi Electric x-MEXT

Page 1 Air conditioners for IT Cooling x-MEXT INSTALLATION, USE AND MAINTENANCE MANUAL English English Italian is the original language. The other languages versions are translation of the original. To ensure safe and correct use, carefully read this manual and make sure to understand all the contained indications...
Page 2 Before carrying out any operation on the machine, you must carefully read this manual and make sure you understand all the instructions and information given. Keep this manual in a known and easily accessible place to refer to as necessary during the entire life-span of the unit. This Manual has been prepared by MEHITS S.p.A.: Reproduction, even partial, of this booklet is prohibited.
Page 3 GENERAL PROVISIONS………………………………………………………………………………. 5 GENERAL INFORMATION AND SAFETY ........................5 1.1.1 Scope of the manual ..............................5 2 ..SYMBOLS ..........................6 3 ..GLOSSARY AND TERMINOLOGY ................... 7 ATTACHED DOCUMENTATION ........................... 8 3.1.1 General safety regulations ............................8 3.1.2 Precautions against residual risks ........................... 9 3.1.3 List of machine internal symbols ..........................
Page 4 4.7.1 Electrical data ................................ 46 4.7.2 Power supply for packaged machine ........................47 4.7.3 Auxiliary electric connections..........................47 4.7.4 LAN network connection ............................48 AIR CONNECTIONS ..............................49 AIR DELIVERY CHANNEL FOR OVER MACHINES ....................49 4.9.1 Channel fastening ..............................50 4.9.2 Air delivery for UNDER machines ..........................
Page 5 1 GENERAL PROVISIONS 1.1 General information and safety 1.1.1 Scope of the manual This manual, which is an integral part of the machine (1), was prepared by the Manufacturer to provide the necessary information to all those who are authorised to interact with it during its life span: Buyers, System Designers, Carriers, Handling Operators, Installers, Expert Operators, Specialist Technicians and Users.
Page 6 2 SYMBOLS DANGER: Indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury. WARNING: Warning indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury. ATTENTION: Attention indicates a potentially hazardous situation which, if not avoided, could cause minor or moderate damage.
Page 7 3 GLOSSARY AND TERMINOLOGY There are some recurring terms in the manual which are described below in more detail. Manufacturer: this is the company that has designed and built the machine in line with current laws, implementing all the good construction rules, and paying attention to the health and safety of people interacting with the machine.
Page 8 3.1 Attached documentation The following documents are delivered with the unit: • Installation, use and maintenance manual (multilingual): this manual accompanies the unit and contains the main installation, use and maintenance information. • Installation, use and maintenance manual (extended): in electronic format and available on the manufacturer's website, it offers detailed information on the installation, use and maintenance steps set out in the multilingual manual supplied with the machine.
Page 9 • units belonging to the x-MEXT series are intended for indoor installation. The machine must be installed in a suitable place where there is no risk of falling objects or dripping liquids;...
Page 10 The units may only be serviced and disposed of by qualified technicians. Machines ready for coupling with remote condenser (x-MEXT-i/f-G02-DX / x-MEXT-i/f-G02-DX-DF) are supplied with nitrogen seal charge and require to be charged with refrigerant gas (by the installer).
Page 11 Identification plate: the machine type can be found on the label attached directly to the machine. The label provides the reference data and all the essential information required to ensure safe operation DESIGNATION IDENTIFICATION PLATE x-MEXT-i-G02-DX-O-029 x-MEXT Series Compressor type...
Page 12 3.3 Storage temperature When stored for a long period of time, the machine must be placed in a protected environment, at a temperature between -30 °C and 45 °C, without surface condensation and away from direct sunlight. 3.4 Operating limits ROOM AIR CONDITIONS Room air temperature: Relative humidity - %...
Page 13 The x-MEXT range provides for two different types of compressors. The machines can be equipped with variable-speed compressors ( x-MEXT-i series) or with fixed-speed compressors (x-MEXT-f). With these two configurations, there are one or two cooling circuits depending on the cooling capacity of the machine. The machines can also be installed in combination with an external remote condenser ( DX machines, air-cooled) or with a condenser incorporated in the unit ( DW machines, water-cooled).
Page 14 Air filter x-MEXT series machines are supplied with air filters with 60% COARSE efficiency (ISO EN 16890), with synthetic fibre filter media to ensure high aeraulic efficiency. A differential pressure switch is also provided to monitor the state of cleanliness of the filters.
Page 15 3.5.6 Structure The main features of the structure are: • Front access to all components requiring adjustment and routine maintenance; • The internal panelling is in steel sheet metal with protective surface treatment in compliance with UNI ISO 9227/ASTMB117 and ISO 7253; •...
Page 16 UNDER VERSION Air filter Electrical panel Plug fan Humidifier Installation, use and maintenance manual...
Page 17 Refrigerant gas safety valves In accordance with the requirements of European Directive 2014/68/EU (PED), the cooling circuit of x-MEXT units is protected against overpressure generated by abnormal operation of the unit or external events (e.g. fire), both on the low-pressure and the high-pressure side.
Page 18 Should it be necessary to use an additional safety valve to protect the line, this should be installed outside the machine. DO NOT INSTALL THE SAFETY VALVE INSIDE THE MACHINE. 3.6.3 Values for the intervention of high pressure switches and safety valves x-MEXT-i Safety valve Factory installed High pressure Possible manual reset...
Page 19 4 TRANSPORT, STORAGE AND INSTALLATION 4.1 Transport and moving 4.1.1 General transport, handling and storage information During transport and when not installed immediately upon receipt, the machine should be kept in its packaging in a closed and dry location, away from direct sunlight. Temperature and humidity limits for transportation and storage Temperature and humidity limits INV machines...
Page 20 4.1.4 Receipt and inspection Upon receipt, verify the integrity of the machine and check it against the order. • Check the number of packages against the transport document. If incorrect, notify the carrier and the Manufacturer. • Perform a visual inspection of the packaging. INFORMATION: If any of the packages are damaged or missing, contact the Sales Office of the manufacturer and the carrier, to agree the next plan of action.
Page 21 MACHINE EXTERNAL PANELS The panels of x-MEXT machines can be removed: the front panels are hinged and can be quickly removed without the need for tools. The side and rear panels are screwed and can be removed to facilitate the installation and/or maintenance activities.
Page 22 OBLIGATION: The unit must be installed in an area where access is only permitted to OPERATORS, MAINTENANCE PERSONNEL and TECHNICIANS. If this is not possible, it must be enclosed in a perimeter fence positioned at least two metres from the external surfaces of the machine itself. The staff of the INSTALLER or any other visitors must always be accompanied by an OPERATOR.
Page 23 HOLE IN THE RAISED FLOOR WITH FLOOR STAND (OPTION) x-MEXT-i-G02-DX / x-MEXT-i-G02-DX-DF x-MEXT-f-G02-DX / x-MEXT-f-G02-DX-DF SIZE 1142 1600 2250 x-MEXT-i-G02-DW / x-MEXT-i-G02-DW-DF / x-MEXT-i-G02-DW-FC x-MEXT-f-G02-DW / x-MEXT-f-G02-DW-DF / x-MEXT-f-G02-DW-FC SIZE 1142 1930 2880 Installation, use and maintenance manual...
Page 24 4.3.3 Installation clearances To ensure correct operation and maintenance, the machine must be installed ensuring compliance with the minimum space requirements. OBLIGATION: For a correct installation of the machine, it is necessary to ensure a free area at the front of the machine, as shown in the figure.
Page 25 / x-MEXT-i-G02-DX DF x-MEXT-f-G02-DX / x-MEXT-f-G02-DX DF QUOTE 1202 1660 2610 1142 1600 2550 x-MEXT-i-G02-DW / x-MEXT-i-G02-DW DF / x-MEXT-i-G02-DW FC x-MEXT-f-G02-DW / x-MEXT-f-G02-DW DF / x-MEXT-f-G02-DW FC QUOTE 1202 1990 2940 1930 2880 1142 Installation, use and maintenance manual...
Page 26 4.4 Refrigerant connections to the remote air-cooled condenser OBLIGATION: The cooling circuits must be completed by qualified personnel. All the works, the choice of the components and the materials used must comply with the "Good Practices", according to the regulations in force in the different countries, taking into account the intended operating conditions and uses of the equipment.
Page 27 4.4.2 General information for the completion of the cooling line The cooling line must have a rational and practical path, in order to: • limit pressure drops; • reduce the coolant content; • facilitate the return of lubricant oil to the compressor; •...
Page 28 RACCORDEMENT LIQUIDE ЛИHИЯ ЖИДКOCTИ ЛИHИЯ ГOPЯЧEГO ГА3А 4.4.5 Diameters of the machine cooling connections The tables show the diameters of the cooling connections of the machine: x-MEXT-i-G02-DX / x-MEXT-i-G02-DX DF MODEL Gas delivery [mm Ø] 2 x 22 2 x 22...
Page 29 Recommended cooling lines Below are the diameters of the refrigerant lines recommended for connection to x-MEXT series air conditioners and referred to the "equivalent length" (max. 100 m). For equivalent pipe lengths of more than 100 m, please contact the sales department of the manufacturer.
Page 30 / x-MEXT-i-G02-DX-DF Equivalent length [m] Nominal MODEL Ø [mm] delivery Ø 18 mm Ø 22 mm Liquid return Ø 16 mm Ø 18 mm delivery Ø 22 mm Liquid return Ø 18 mm Ø 22 mm delivery Ø 22 mm Ø...
Page 31 / x-MEXT-f-G02-DX-DF Equivalent length [m] Nominal MODEL Ø [mm] Gas delivery Ø 18 mm Ø 22 mm Liquid return Ø 16 mm Ø 18 mm Ø 22 mm Gas delivery Ø 18 mm Ø 22 mm Liquid return Ø 16 mm Ø...
Page 32 4.4.8 Installation diagram OBLIGATION: Construct the pipes with the indicated slopes to facilitate the return of the lubricating oil to the compressor. Apply the diagram to each refrigerant circuit of the unit. Difference in height between the units as an absolute value. Maximum equivalent length of the connection pipes: •...
Page 33 4.4.9 Connection of the refrigerant pipes 4.4.9.1 Machine The connections of the cooling circuit with the condensing unit are located inside the machine. On both the gas delivery line and the liquid return line are ball valves, downstream of which are threaded copper pipe sections.
Page 34 Machine with remote air-cooled condenser The values indicated in the table refer to the charge to be performed for each refrigerant circuit of the machine. x-MEXT-i-G02-DX / x-MEXT-i-G02-DX-DF MODEL 140*...
Page 35 Compressor lubricant oil top up The compressors are charged with lubricating oil as indicated below: x-MEXT-i-G02-DX / x-MEXT-i-G02-DX DF x-MEXT-f-G02-DX / x-MEXT-f-G02-DX DF x-MEXT-i-G02-DW / x-MEXT-i-G02-DW DF / x-MEXT-i-G02-DW FC x-MEXT-f-G02-DW / x-MEXT-f-G02-DW DF / x-MEXT-f-G02-DW FC MODEL OIL TYPE...
Page 36 Refrigerant charge for DW machine The machines with built-in water condenser are supplied with refrigerant charge and do not require the addition of refrigerant fluid or lubricating oil. The factory refrigerant charges are as follows: x-MEXT-i-G02-DW / x-MEXT-i-G02-DW-DF / x-MEXT-i-G02-DW-FC MODEL 140*...
Page 37 OBLIGATION: The maximum pressure of the hydraulic system in operation must not exceed 16 bar. OBLIGATION: It is absolutely essential that, in the presence of dirty and/or aggressive water, an intermediate heat exchanger is placed upstream of the heat exchangers. Installation, use and maintenance manual...
Page 38 4.5.1 Determination of hydraulic circuit pressure drops The calculation of the pressure drops of the hydraulic circuit must be defined during the design of the system. Please refer to the diagrams below for the calculation and check of pressure drops in the hydraulic circuit. Continuous pressure drops STEEL PIPES - WATER TEMPERATURE 10°C LINEAR PRESSURE DROPS [mm H...
Page 39 STEEL PIPES - WATER TEMPERATURE 50°C LINEAR PRESSURE DROPS [mm H O/m] LINEAR PRESSURE DROPS [mm H O/m] Installation, use and maintenance manual...
Page 40 STEEL PIPES - WATER TEMPERATURE 80°C LINEAR PRESSURE DROPS [mm H O/m] LINEAR PRESSURE DROPS [mm H O/m] Equivalent lengths (ml) for concentrated pressure drops. Values for completely open valves. Globe Globe Ø Globe Check Curve valve valve Valve 90° Curve 90°...
Page 41 4.5.2 Hydraulic connection to water coils This diagram applies to the hydraulic circuit of the additional coil of the Dual Fluid / Free-Cooling system The water inlet and outlet pipes can be identified by the labels applied directly on the machine. During the design phase, envisage the installation of the following components on the inlet water line.
Page 42 4.5.3 Hydraulic connection to built-in water-cooled condenser (DW) This diagram is valid for the hydraulic circuit of the following heat exchangers: • Water condenser: connect the condenser to the cooling water distribution hydraulic circuit. The circuit can be: open: cooling tower with water hardness control system / open-to -recycle well system. close: with remote dry cooler.
Page 43 4.5.5 Installation technical notes The connection pipes must be suitably supported so that they do not weigh down on the machine. Avoid rigid connections between the machine and the pipes, and install vibration dampers. For temperatures values, minimum and maximum water flow rates and the volumes of water in the heat exchanger water circuit refer to the technical bulletin.
Page 44 Explanatory notes: ref. 1: Concentrations of hydrogen ions greater than those indicated implies a high risk of deposits, whereas concentrations of hydrogen ions lower than those indicated implies a high risk of corrosion; ref. 2: The hardness measures the amount of Ca and Mg carbonate dissolved in the water with a temperature lower than 100°C (temporary hardness).
Page 45 4.6 Hydraulic connection of the condensate drain The connection of the condensate drain must be carried out as decided during the design stage SUPPLY The condensate drain pipe is made of plastic (internal Ø 19 mm) and is connected to the collection tank.
Page 46 Below are the electrical data for the maximum operating conditions of the internal unit alone, in the basic configuration and without accessories: x-MEXT-i-G02-DX / x-MEXT-i-G02-DX DF /x-MEXT-i-G02-DW / x-MEXT-i-G02-DW DF / x-MEXT-i-G02-DW FC MODEL Power supply V/ph/Hz...
Page 47 4.7.2 Power supply for packaged machine Use a multipole conductor with protective sheath. The power cable section depends on the maximum absorbed current of the machine (A) as shown in the dedicated wiring diagram, in the technical bulletin and in the identification label. To insert the power cable in the machine, use the holes provided by the Manufacturer in the base (UNDER version) or in the side panel (OVER version).
Page 48 4.7.4 LAN network connection Max 15 machines connected in LAN. Machines addressing: Each machine in the LAN network (programmable controller or machine terminal) is identified by a unique address. The Remote Terminal has address 32. Machine # Motherboard address Terminal address Machine 1 Machine 2 Machine 3...
Page 49 4.8 Air connections 4.9 Air delivery channel for OVER machines The sizing of the ducts must be defined at the system design stage. Refer to the nominal and maximum useful head values of the machine indicated in the relevant Data Book. Duct pressure drops must be limited, as high values will cause an increase of fan power consumption.
Page 50 4.9.1 Channel fastening Gasket Gasket Machine panel OBLIGATION: Make sure that the weight of the duct is not supported by the machine support frame. 4.9.2 Air delivery for UNDER machines The underfloor arrangement of the air delivery system must be defined at the system design stage. Refer to the nominal and maximum useful head values of the machine indicated in the relevant Data Book.
Page 51 4.10 Options OBLIGATION: All assembly, positioning and maintenance operations must be carried out with adequate means and by skilled personnel, trained and authorized for this type of manoeuvres. WARNING: The electrical connections must only be designed and completed by personnel with precise technical competence or specific skills in the field of activity.
Page 52 4.10.1 Serial probes for temperature and humidity OBLIGATION: The probe must be installed protected by atmospheric agents. For the installation use the fixing holes as shown in the figure. The connection cable must be connected to the machine's terminal board. Avoid direct contact of the connection cable with hot or sharp surfaces.
Page 53 4.10.2 Floor water sensor The system includes an electronic relay installed in the machine electrical panel and a water sensor (supplied as part of the documentation) The 10 KΩ resistor is located on the relay inside the electrical panel, while the electrical connections for the probe and alarm contact are in the machine terminal board.
Page 54 4.10.3 Low outdoor temperature kit 4.10.4 Low outdoor temperature kit + additional liquid receiver 4.10.5 Additional liquid receiver Low outdoor temperature kit Low outdoor temperature kit + additional liquid receiver Accessory, supplied as a kit LEGENDA Compressor Crankcase heater CND1 Condenser Evaporator Accessor...
Page 55 In installations with an equivalent length of the refrigerant lines of more than 25 m, the installation of an additional liquid receiver is recommended, on the outside liquid line. Table of minimum recommended volumes: x-MEXT-i-G02-DX / x-MEXT-i-G02-DX DF MODEL Additional receiver...
Page 56 4.11 Dirty filter air differential pressure switch Dirty filter air differential pressure switch. The system is installed inside the unit, below the QE, and consists of the pressure switch and the pressure detection pipes upstream and downstream of the filter section. Technical features Connection of the high pressure Connection of the low...
Page 57 4.13 Control of the air pressure or air flow The accessory is installed in the front compartment of the machine. The system controls the rotation speed of the fans in order to keep the air pressure or air flow constant. It is possible to carry out only one check, of either the pressure or the air flow.
Page 58 Cover opening screw AIR PRESSURE High pressure piping to unroll in the raised floor Low pressure pipe already installed Tee for possible extension of the pipe Extension pipe not provided AIR FLOW Zero point calibration LED Display Reset button Calibration potentiometer + = DC 8…33V ...
Page 59 4.13.1 Network analyser NETWORK ANALYSER AMPEROMETRIC WIRING DIAGRAM TRANSFORMER RJ12 connector for programming RS485 CONNECTION Microprocessor control connection cable The data that can be read on the microprocessor control display are: • Linked voltage (phase - phase) for three-phase machines; •...
Page 60 4.13.2 Double power supply with automatic transfer switch Switching is automatic. In emergency situations, switching can be performed manually. INFORMATION: Open transition type transfer switch with a minimum interruption of the supply during transfer. Any remote condenser must be powered by the indoor machine. 1.
Page 61 4.13.3 Condensate discharge pump kit The pump if supplied in mounting kit. The kit includes: • Centrifugal pump with check valve on water discharge; • Adhesive Velcro strip for fixing; • Anti-crushing spiral hose – internal diameter Ø 10 mm; •...
Page 62 Power supply: 230V~ 50/60Hz FUNCTIONAL CHECKS Electrical data: 70W – 0,67A Pour water into the condensate collection try of the Safety contact: NC 8A resistive - 250V machine and check that the pump activates and Max water flow: 500 l/h stops when the water level has been lowered.
Page 63 4.13.4 Proportional steam humidifier The accessory includes the combined air temperature / humidity probe and the system management control. The optional is factory installed and requires only water filling connection. This humidifier produces unpressurised Steam distributor steam by means of electrodes immersed in the water contained in the cylinder.
Page 64 4.13.5 Humidifier Load-bearing frame. Steam cylinder. Cylinder strap. Supply tank and overflow. Water conductivity meter. Fill hose. Overflow pipe. Cylinder fill hose. Fill solenoid valve – Ø 3/4" GM. Drain solenoid valve and supply / drain assembly. Drain connector Ø 32mm. Electrode electrical connection.
Page 65 Characteristics of the water The quality of the water used affects the evaporation process for which the humidifier must be supplied with untreated water, drinkable and not demineralized. WATER CONDUCTIVITY UNIT OF CHARACTERISTICS MEDIUM HIGH MEASURE Specific conductivity at 20°C (σ μS/cm 1250 R, 20 °C...
Page 66 Working logic STEAM PRODUCTION DRAIN DUE TO OVERFLOW The filling / draining solenoid valves are The activation of the overflow drain is closed. deduced from the system via the The electrodes are electrically powered tank level sensors. and steam is produced. The electrodes are electrically Steam production is controlled by powered during the water discharge...
Page 67 Cylinder maintenance The life of the cylinder depends on a number of factors, including: the complete filling with lime scale and/or the partial or complete corrosion of the electrodes, the correct use and sizing of the humidifier, the output, and the quality of the water, as well as careful and regular maintenance.
Page 68 Maintenance of the other components in the water circuit OBLIGATION: • when cleaning the plastic components do not use detergents or solvents; • Lime scale can be removed with a 20% acetic acid solution, followed by water rinsing; • The steam humidifier has just one part that requires periodical replacement: the steam production cylinder.
Page 69 PROBLEM CAUSES REMEDY • the steam distributor is not installed • correctly. check that the steam distributor has been installed correctly. The humidifier wets • the condensate return is blocked. • decrease the steam production set on the controller. the coil •...
Page 70 4.13.6 Electric heaters The accessory is installed at the factory downstream of the cooling coil. The accessory is not available for power supply voltages 460/3/60 and 460/3+N/60. OVER UNDER The electric heating system has three stages of operation, allowing for a step-by-step partialisation of the heating capacity of the system.
Page 71 ELECTRIC HEATER REPLACEMENT DANGER: The electrical connections must only be designed and completed by personnel with precise technical competence or particular skills in the field of activity. Before proceeding, personnel must disconnect all power supply sources, making sure that no one may inadvertently re-connect them.
Page 72 4.13.7 Smoke detector The detector is supplied as an assembly kit. The optical smoke detector reacts to the presence of products caused by combustion (visible fumes). The operating principle is based on the light scattering technique (Tyndall effect). The device is in conformity to EN 54-7 standard. Sizes in millimetres PERIODIC TEST Verify the correct functioning of the detector by means of a smoke generator (be careful not to damage or dirty the sensor).
Page 73 4.13.8 Fire detector The detector is supplied as an assembly kit. The fire detector has been designed to identify temperatures at which fires may start. When the temperature exceeds the set threshold or when there is a rapid variation in temperature, the relay is activated to signal an alarm.
Page 74 4.13.10 power supply of remote condenser or Dry Cooler from indoor machine WARNING: The electrical connections must only be designed and completed by personnel with precise technical competence or particular skills in the field of activity. The electrical panel of the machine is equipped with an overcurrent protection on the power supply line for each remote condenser or dry cooler.
Page 75 B981 - H max 500 Min height Max height Weight [kg] 27.4 39.5 48.5 B982 - H max 750 Min height Max height Weight [kg] 27.7 39.8 48.8 B983 - H max 1000 Min height Max height 1000 1000 1000 Weight [kg] 40.1...
Page 76 Mounting Install the frame as shown in Adjust the height of the frame. the figure by attaching the When levelling is complete, angle brackets to the crossbars lock the position with the lower using the bolts provided. nut. A level deviation of more than 5 mm between the ends of the base may cause the condensate to overflow from...
Page 77 4.13.13 Plenum The plenums of the x-MEXT series can be installed on the return or the delivery of the unit, depending on the machine version and the plenum. The accessory is supplied separately and must be installed on the machine by the installer.
Page 78 Plenum installation OBLIGATION: All the assembly operations must be carried out using suitable means and by experienced individuals, trained and authorised for these types of activities For stability reasons, only one plenum can be installed on the machines. The upper frame of the machine is equipped with Lay an airtight seal on the upper frame brackets for fixing the plenum...
Page 79 4.13.14 Direct free-cooling plenum DIRECT FREE-COOLING PLENUM - UNDER The external air must be channelled (by the Serial external air Rain screen (not customer) as shown in the figure. temperature probe supplied) Install the serial external air temperature probe supplied in the duct, or in any case making sure that it is protected from the weather.
Page 80 The accessory excludes the installation of plenums and the unit support frame. x-MEXT-i-G02-DX / x-MEXT-i-G02-DX DF x-MEXT-f-G02-DX / x-MEXT-f-G02-DX DF QUOTE 1142 1600 2550 x-MEXT-i-G02-DW / x-MEXT-i-G02-DW DF / x-MEXT-i-G02-DW FC x-MEXT-f-G02-DW / x-MEXT-f-G02-DW DF / x-MEXT-f-G02-DW FC QUOTE 1142 1930 2880 Installation, use and maintenance manual...
Page 81 5 PRE-COMMISSIONING Before contacting the Specialist Engineer, who will execute the first commissioning running test, the Installer must carefully check that the installation complies with the requirements and specifications set-out during the design stage, making sure that: • the electrical connection is correct, and that it guarantees DOOR LOCKING SWITCH compliance with the current Electromagnetic Compatibility Directive;...
Page 82 6 START 6.1 Calibration and fine-tuning Commissioning must be carried out by a specialist Engineer, in the presence of the Installer and an experienced Operator. The specialist Engineer will test the equipment, carrying out checks, calibrations and commissioning according to the applicable procedures falling under their responsibility.
Page 83 7 METHOD OF USE 7.1 Provisions and warnings for use During the daily use of the system, the presence of an operator is not required. The operator must only intervene to carry out periodic checks, in case of emergency, or during the planned start and stop operations. If these activities are carried out consistently and correctly, good long-term performance of the machine and the equipment will result.
Page 84 WARNING: Risk of freezing for Dry Cooler. In case of machine stop during the winter period, take the necessary precautions to prevent the water inside the system from freezing. 7.5 Start-up after extended machine inactivity Before starting the machine, carry out all the maintenance activities. The specialist Engineer must also carry out adequate checks, calibrations and the start-up procedure.
Page 85 Intervention Fault Cause Solution level Check electric heaters supply Service Hot Resources Check the heater safety thermostat Service Check the operation of any free-cooling dampers User Setting Reduce humidity setpoint User Faulty Check the humidity probe reading User Ambient humidity too high Humidifier Check humidifier operation (see humidifier)
Page 86 9 MAINTENANCE 9.1 Maintenance instructions OBLIGATION: Both regular and extraordinary maintenance activities must be carried out by authorised trained individuals equipped with all the necessary personal protective equipment. The machine site of installation must meet all the safety requirements. The procedures set by the Manufacturer must be followed. Before carrying out any maintenance operation, it will be necessary to: •...
Page 87 9.2 Scheduled maintenance Carry out all the scheduled maintenance activities at the indicated intervals. INFORMATION: Failure to carry out regular maintenance will make the warranty null and void and relieve the manufacturer of all safety related responsibilities. The scheduled maintenance activity intervals are indicated in the tables on the following pages. To “read” the hours of operation, they must be displayed on the microprocessor display.
Page 88 The frequency of the operations described in the table above should be considered indicative. The table may vary depending on the specific use of the machine and the system in which the same is required to operate. 9.4 Compressor maintenance activity table Every 1000 h or 3 months Check the oil level (if the Checking for any vibration and...
Page 89 9.7 Air filter maintenance/replacement Air filter access: • version OVER: front access for all machines. Filter located on the front door. • UNDER version: for all machines, access from the air suction side (folding filters). Machine with damper at the air suction.
Page 90 10 DISPOSAL OF THE MACHINE When dismantling the machine, contact a service centre, distribution or branch authorised by the Manufacturer. OBLIGATION: The machine contains fluorinated greenhouse gases regulated by the Kyoto protocol. In accordance with the law, these must not be dispersed in the environment but collected and delivered to the retailer or collection centre.
Page 92 Via Caduti di Cefalonia 1 – 36061 Bassano del Grappa (VI) - Italy IUM_x-MEXT_07_22_EN...

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