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Mitsubishi Electric MEDR Series Instructions For Installation, Use And Maintenance Manual

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Air conditioners for IT Cooling
MEDR
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 and information.
MEHITS S.p.A.

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Summary of Contents for Mitsubishi Electric MEDR Series

  • Page 1 Air conditioners for IT Cooling MEDR 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 and information.
  • 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: Table Of Contents

    CONTENTS GENERAL PROVISIONS ................ 5 ..........................5 ENERAL INFORMATION AND SAFETY 1.1.1 Scope of the manual ..............................5 SYMBOLS ....................6 GLOSSARY AND TERMINOLOGY ............7 ............................8 TTACHED DOCUMENTATION 3.1.1 General safety rules ..............................8 3.1.2 Precautions against residual risks ..........................9 3.1.3 List of machine internal symbols ..........................
  • Page 4 ..............................33 MERGENCY STOP ......................... 33 ROLONGED SHUTDOWNS OF THE MACHINE ......................33 TART UP AFTER EXTENDED MACHINE INACTIVITY FIRST DIAGNOSTICS ................34 … .............................. 34 ROUBLESHOOTING MAINTENANCE ..................35 ............................ 35 AINTENANCE INSTRUCTIONS ............................35 CHEDULED MAINTENANCE ........................36 ABLE OF GENERAL MAINTENANCE JOBS .............................

  • Page 5: General Provisions

    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 (*), 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: Symbols

    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: Glossary And Terminology

    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: Attached Documentation

    3.1 Attached documentation The following documents are delivered with the unit: • Installation, use and maintenance manual: it contains the list of operations to carry out. • Wiring diagram: it is specific to the machine in question. It is useful for the persons who will have to carry out work on the electrical system, as it shows the various components and connections.

  • Page 9: Precautions Against Residual Risks

    Only use the machine with the safety devices properly installed and in perfect working order. Failure to observe this requirement could result in serious risks to the health and safety of the persons involved. Keep the machine in perfect working order and perform the routine maintenance recommended by the manufacturer. Good maintenance can help to ensure the best possible performance, a long useful life and constant compliance with the safety requirements.
  • Page 10 Prevention of environmental risks • The machine contains substances and components that are dangerous for the environment, such as ethylene or propylene glycol. • The units may only be serviced and disposed of by qualified technicians. Prevention of other residual risks •...

  • Page 11: List Of Machine Internal Symbols

    3.1.3 List of machine internal symbols Equipment under voltage Earth connection Internal moving components 3.1.4 Procedure for requesting support For support, please contact one of the authorised centres (Italy) or our branches/distributors (outside Italy). When requesting technical support concerning the machine, cite the data on the identification plate, and the serial number in particular, and describe the conditions of access and the area around the machine.

  • Page 12: Identification Plate

    3.2.2 Identification plate The type of machine is shown on the label on the machine, normally found in the electrical panel. The label provides the reference data and all the essential information required to ensure safe operation. 3.3 Storage temperature During transport and if the machine is not installed at the reception, do not remove the packaging and place the machine in an enclosed, dry and protected from sunlight site at temperatures ranging between -40°C and 60°C in absence of superficial condensation.

  • Page 13: Description Of The Main Components

    3.5 Description of the main components Heat sink for IT Cooling with axial fans with horizontal or vertical air flow. Air flow from coil to fan. The design solution allows a high degree of application flexibility. There are 2 series with 9 models each. Between the internal unit and the heat sink, the hydraulic connection and the electrical connection of the fan speed control proportional signal and the alarms are required.

  • Page 14: Electrical Panel

    3.5.1 Electrical panel The power supply is independent of the internal unit. The electrical panel is installed on the machine and is fitted with a line disconnector. In accordance with the standard EN 60204-1, the handle of the circuit breaker must be easy to access and at a height of between 0.6 and 1.9 metres above the floor.

  • Page 15: Transport, Storage And Installation

    4 TRANSPORT, STORAGE AND INSTALLATION 4.1 Transport and moving 4.1.1 Storage Place in a protected environment, where there is no wind or condensation. Secure the machine in place so that there is no risk of overturning. 4.1.2 Transport For road transport, it is advisable to use a low loader truck with tarpaulin, or use tarpaulin to protect the units against bad weather. Use straps with a ratchet system to secure the unit for the purpose of transport.

  • Page 16: Discharge

    4.1.3 Discharge Lift and move the machine as indicated on the packaging and/or directly on the machine. It is advisable NOT TO REMOVE the shrink wrap protection during the unloading, handling and positioning operations. OBLIGATION: All the unloading, handling and positioning operations must be carried out using appropriate means and by experience personnel, trained and authorised for such activities.

  • Page 17: Disassembly Of The Machine Panels

    4.2 Disassembly of the machine panels DANGER: The machine panelling is made of heavy aluminium sheet. All the assembly and disassembly operations must be carried out using suitable means and by experienced individuals, trained and authorised for these types of operations. Machine panels The side panels can be removed.

  • Page 18: Installation

    4.3 Installation 4.3.1 Installation of the standard machine OBLIGATION: All the phases of installation must be covered in the general project. Before starting the installation activities, in addition to defining the technical requirements, the person authorised to perform the work must, if necessary, implement a "safety plan" to safeguard the safety of the people directly involved, and strictly implement the safety rules and, in particular, the laws that apply to mobile construction sites.

  • Page 19: Fixing The Machines To The Ground

    4.3.3 Fixing the machines to the ground The machines must be fixed to the ground or to the support structure. The support feet are provided with holes for fixing as shown in the figure. Fixing systems are not supplied. HORIZONTAL AIR FLOW VERTICAL AIR FLOW Installation, use and maintenance manual...

  • Page 20: Installation Clearances

    4.3.4 Installation clearances OBLIGATION: For a correct installation of the machine, it is necessary to ensure a free area around the same, as shown in the figure. This allows correct air circulation and ease of access to the components of the machine for the purpose of normal inspection and maintenance operations.

  • Page 21: Installation And Position Of Any Obstacles

    4.3.5 Installation and position of any obstacles OBLIGATION: The air expelled from the machine must be easily dispersed into the environment. Avoid the presence of obstacles that may cause the expelled air to recirculate. Structures around the installation perimeter must ensure the free movement of air such as: finned barriers, finned barriers with sound-proofed passages.

  • Page 22: Installation In Places With Heavy Snowfall

    4.3.6 Installation in places with heavy snowfall Snow can accumulate around and above the machine and low outside temperatures can freeze the snow in blocks of ice that block the fan grille or the coil. This condition may cause a malfunction or breakage of the machine. Check and keep the machine clear of snow.

  • Page 23: Installation Technical Notes

    Install an expansion vessel with a safety valve in the hydraulic circuit. The hydraulic circuit must be sized according to the applicable laws in force. Supply OBLIGATION: Maximum operating pressure 10 bar, including the hydrostatic head – PN 10. 4.4.1.1 Hydraulic connections MODEL HYDRAULIC CONNECTIONS...

  • Page 24: Cleaning And Filling The Hydraulic Circuits

    4.4.3 Cleaning and filling the hydraulic circuits OBLIGATION: Wash the pipes of the hydraulic circuits to remove any processing residues and other dirt inside. This operation must be performed to avoid damaging the parts of the machine. After washing, check the hydraulic circuits for any leaks. To do this, load the circuits at a pressure higher than atmospheric pressure and check that there are no pressure leaks over time.

  • Page 25: Water Quality

    4.4.4 Water quality OBLIGATION: The values shown in the table must be guaranteed during the entire life cycle of the machine. Ref. Description Symbol Range values Hydrogen ions 7.5 - 9 Presence of calcium (Ca) and magnesium Hardness 4 ÷ 8.5 °D (Mg) Chloride ions <...

  • Page 26: Electrical Connections

    4.5 Electrical connections The electrical connections of the machine must be defined during the system design. 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 27: Electrical Panel

    Three-phase Single-phase POWER SUPPLY 4.5.3 Electrical panel The electrical panel is located inside the condenser structure. To access it, the side panel must be removed. The electric power panel is suitable for outdoor installation and complies with EN60204-1 standards. The electric power panel includes: •...
  • Page 28 Remove the panels to access the power supply box Junction box for power supply input SIGNAL 43 – 2 → 0-10V signal 101 – 1 → alarm relay Installation, use and maintenance manual...

  • Page 29: Optional Installation

    4.6 Optional installation 4.6.1 Vertical air flow The accessory is only available for machines equipped with 1/2/3 fans. The units can be supplied with support feet to obtain a vertical airflow. The support feet are supplied in assembly kits together with the necessary hardware.

  • Page 30: Hooks For Lifting And Rotation

    4.6.2 Hooks for lifting and rotation The types of supports for lifting and rotating the machine can be of 3 types, depending on the size and number of fans of the machine itself. The machines are equipped with lifting devices. TYPE 1_ single fan ROTATION LIFTING...
  • Page 31 TYPE 2_ 2/3 fan UNIT WITH 2/3 FANS HORIZONTAL AIR FLOW PRESENCE OF LIFTING EYEBOLTS LIFTING AND ROTATION KIT VERTICAL AIRFLOW MACHINES TYPE 3 _Double mobile MACHINE LIFTING ROTATION KIT OBLIGATION: All the unloading, handling and positioning operations must be carried out using appropriate means and by experience personnel, trained and authorised for such activities.

  • Page 32: Pre-Commissioning

    LENGTH OF SLING BAR L HEIGHT FROM SLING BAR H OBLIGATION: The sling bar length 'L' must never be less than the length of the machine. Ensure that the distance 'H' between the machine and the sling bar is greater than 1.1 metres. OBLIGATION: •...

  • Page 33: Start

    6 START 6.1 Machine start-up 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 34: First Diagnostics

    8 FIRST DIAGNOSTICS 8.1 Troubleshooting … List of actions to be taken in case of machine fault. Fault Cause Solution Intervention level Check the power supply to the fan Service Check the incoming drive signal from the Service internal unit Check that the fan rotates freely User Check the air channel for any obstructions...

  • Page 35: Maintenance

    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 any kind of maintenance is carried out the following measures must be observed: •...

  • Page 36: Table Of General Maintenance Jobs

    9.3 Table of general maintenance jobs WORK INTERVALS Beginning of season Beginning of season WORK TO BE CARRIED OUT Every day Every 500 hours every every 1000 hours every 2 months 3 months  Check any alarms.  Visually check for liquid leaks ...

  • Page 37: Cu-Al "Tube And Fin" Coils

    DANGER: The aluminium fins are thin and sharp. Make sure to always wear appropriate PPE to avoid cuts and abrasions. Protect the eyes and face against the spraying of water and dirt during the cleaning process. Wear waterproof shoes or boots and clothes that cover all the body.

  • Page 38: Extraordinary Maintenance

    Supplementary maintenance. The salient feature of the coating is the fact that it can be reapplied. Solid particles (like sand) can enter from the side of the coil where air flows in, and erode the corrosion protection exposing the metal. Should this happen, the surface coating must be reapplied.
  • Page 39 The machine is identified with the following symbol: to indicate that it must be disposed of by separating the various materials. The customer has an important role in ensuring reutilisation, recycling and other forms of recovery of the machine. The machine is classed as PROFESSIONAL by WEEE Directive 2012/19/EU. Upon dismantling, it must be treated as waste by the user, who may ask the reseller to collect it, or take it to authorised waste collection centres.
  • Page 40 Via Caduti di Cefalonia 1 – 36061 Bassano del Grappa (VI) - Italy IUM_MEDR_00_Z_07_22_EN...

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