INSTALLATION MANUAL CONTENTS
Contents
1. Fixing screw for The number depends on the pipe length Wall hole sleeve Soft vinyl chloride hose of 25 mm in internal dia or hard vinyl chloride pipe VP25 Note Do not use the drain socket and the drain cap in the cold region Drain may freeze and it makes the fan stop The Q ty for to in the above table is the quantity to be used per indoor unit WARNING Be sure to use specified accessories and supplied parts for installation work If there is some defi ciency in parts it may cause a risk of fire electric shock injury by a unit fall or water leakage Constraints On Indoor Unit Installation You should note that indoor unit that can be connected to this outdoor unit have the following constraints on them e Refer to the table below for possible two room indoor unit combinations Combination Models 6 combinations possible MSC 07 MSC 07 MSC 07 MSC 12 MSC 09 MSC 12 MSC 07 MSC 09 MSC 09 MSC 09 MSC 12 MSC 12 3 SELECTING THE INSTALLATION LOCATION e Where it is not exposed to strong wind e Where airflow is good and dustless e Where it is not exposed to rain and direct sunshine e Where neighbours are not annoyed by operation sound or hot air e Where rigid wall or support is available to prevent the increase of operation sound or vibration e Where there is no risk of combustible gas leakage e When installing the unit at a high level be sure to fix the uni2. 100 8310 JAPAN SG79Y048H01
3. 6 MITSUBISHI ELECTRIC SPLIT TYPE AIR CONDITIONER INSTALLATION MANUAL modei MXZ A18WV HFC CE utilized R410A FOR INSTALLER a A WwW N CONTENTS THE FOLLOWING SHOULD ALWAYS BE OBSERVED FOR SAFE INSTALLATION DIAGRAM amp ACCESSORIES eee SELECTING THE INSTALLATION LOCATION OUTDOOR UNIT INSTALLATION i INDOOR OUTDOOR UNITS CONNECTION FINISHING AND TESTORUNI aaa 1 THE FOLLOWING SHOULD ALWAYS BE OBSERVED FOR SAFETY e Please provide an exclusive circuit for the air conditioner and make sure that no other electrical appliances are connected to it e Be sure to read THE FOLLOWING SHOULD ALWAYS BE OBSERVED FOR SAFETY before installing the air conditioner e Be sure to observe the cautions specified here as they include important items related to safety e The indications and meanings are as follows Z WARNING Could lead to death serious injury etc CAUTION Could lead to serious injury in particular environments when operated incorrectly e After reading this manual be sure to keep it together with the OPERATING INSTRUCTIONS in a handy place on the customer s site 2 INSTALLATION DIAGRAM amp ACCESSORIES Before installation This installation manual is only for the outdoor unit installation In installing the indoor units refer to the installation manual attached to each indoor unit Any structual alternations necessary for th
4. N FINISHING AND TEST RUN 5 1 FLARED CONNECTIONS PIPE LENGTH AND HEIGHT DIFFERENCE Limits Pipe length per indoor unit 20m max Total pipe length for multi system 30m max Height difference 10m max No of bends per indoor unit 15 max Total No of bends for multi system 30 max Refrigerant adjustment If pipe length exceeds 20 m additional refrigerant R410A charge is required The outdoor unit is charged with refrigerant for total pipe length up to 20 m Up to 20 m No additional charge is required Additional charge is required Refer to the table below 20 g m x refrigerant piping length m 20 Pipe length Exceeding 20 m Refrigerant to be added Since the outdoor unit for this model has refrigerant filled for connection pipes do not fill any additional refriger ant Do not also exceed the allowable length of pipes given in the table above in piping work Indoor unit B UNIT Outdoor unit Indoor unit A UNIT e For pipe size see the table below SELECTING PIPE SIZE The diameter of connection pipes differs according to the type and capacity of indoor units Match the diameters of connection pipes for indoor and outdoor units according to the following table All l Model name Pipe size for indoor unit
5. T INSTALLATION 4 1 INSTALLING THE UNIT Be sure to fix the unit s legs with bolts when installing it Be sure to install the unit firmly to ensure that it does not fall by an earthquake or a gust e Refer to the figure in the right for concrete foundation 4 2 MOUNTING ARRANGEMENT OF DRAIN SOCKET Please perform the drain piping work only when draining from one place AN CAUTION Do not insert drain socket and drain cap in the cold region because of drain freezing and fan stop Please choose one hole to which drain is drained and install the drain socket in the hole Please close the hole of the remainder with the drain cap Please connect a vinyl hose of 25 mm in the inside diameter on the market with the drain socket and lead drain 4 3 INDOOR OUTDOOR WIRE CONNECTION AND OUTDOOR POWER SUPPLY CORD CONNECTION e Be sure to lead in the power supply cord to the air conditioner in accordance with the specification table below and Technical Standards for Electrical Installation e Be sure to use special circuits for room air conditioner CAUTION Attach an earth leakage breaker according to your installation location If any breaker is not attached it may cause a risk of electric shock AN WARNING Be sure to comply with Technical Standards for Electrical Installation follow this manual and use special circuits for electrical work If there is a lack of circuit capacity or some deficiency in installatio
6. e installation must comply with the local building code require ments E Do not install the unit by yourself customer MI Perform the installation securely referring to Incomplete installation could cause injury due to fire electric shock the unit falling or leakage of water Consult the dealer from whom you pur chased the unit or special installer Install the unit securely in a place which can bear the weight of the unit When installed in an insufficient strong place the unit could fall causing injury Use the specified wires to connect the indoor and outdoor units securely and attach the wires firmly to the terminal block connecting sections so the stress of the wires is not ap plied to the sections Incomplete connecting and fixing could cause fire Do not use intermediate connection of the power cord or the extension cord and do not connect many devices to one AC outlet It could cause a fire or an electric shock due to de fective contact defective insulation exceeding the permissible current etc Check that the refrigerant gas due not leak after installation has completed If refrigerant gas leaks indoors and comes into contact with the fire of a fan heater space heater stove etc harmful substances will be generated Perform earthing Do not connect the earth wire to a gas pipe wa ter pipe lightning rod or telephone earth wire De fective earthing could cause an electric shock Do not ins
7. gas leakage is defect in flaring work Perform flaring work correctly in the following procedure No good Copper Good E pipe a Tilted Uneven Burred 1 Pipe cutting L Z J3 J4 e Cut the copper pipe correctly with pipe cutter E a D O 2 Burrs removal Copper pipe e Completely remove all burrs from the cut cross Burr PPSS RIP section of the pipe Spare reamer gt X Pipe aner Put the end of the copper pipe downward to Flare nut S prevent burrs from dropping in the pipe 3 Putting nut on e Remove flare nuts attached to indoor and out Flaring tool A mm Outside diameter Flare tool for R410A Conventional flare tool clutch type Clutch type Wing nut type 96 35 mm 0 to 0 5 1 0 t0 1 5 1 5 to 2 0 99 52 mm 0 to 0 5 1 0 to 1 5 1 5 to 2 0 A 912 7 mm 0 to 0 5 1 0 to 1 5 2 0 to 2 5 Wi 77 _ York Firmly hold copper pipe in a die in the dimension shown in the VAI Da _ Die table above Die j Copper pipe j 5 Check MERE Flare nut _ Copper pipe e Compare the flared work with the figure below If flare is noted to be defective cut off the flared section and perform flaring work again Inside is shining without Smooth all around any scratches Even length J all around I 5 3 PIPE CONNECTION Note Fasten a flare nut with a torque wrench as specified in the table below When fastened too tight a flare nut may broken after a long period and cau
8. l a earth leakage breaker depending on the installation place Where it is humid If a earth leakage breaker is not installed it could cause an electric shock Perform the drainage piping work securely according to the installation manual If there is a defect in the drainage piping work water could drop from the unit and household goods could be wet and damaged Open as a rule More than 100 mm if the front and both a sides are open More than 100 mm 200 mm or more if there are obstacles to both sides More than 100 mm Open as a rule More than 200 mm if the back both sides and top are open More than 350 mm Note The dimensions given along the arrows above are required to guarantee the air conditioner s performance Install the unit in as wide a place as possible for later service or repairs ACCESSORIES Parts to be locally procured Check the following parts before to installation Power supply cord lt Outdoor unit gt oe n mm acai 7 ndoor outdoor unit connecting wire Dian Socket i 2 core 1 0 mm 1 5 mm Drain cap 2 R o Extension pipe According to Selecting pipe size Wall hole cover Piping tape e Extension drain hose or soft vinyl chloride hose of 15 mm in internal dia or hard vinyl chloride pipe VP16 Refrigeration oil Putty o Pipe fixing band The number depends on the pipe length
9. n it may cause a risk of fire or electric shock Overcurrent that might be produced may include DC substances Be careful to choose the correct type of overcurrent protection switch Rated Voltage Breaker capacity Connect to the supply terminals and leave a contact separation of at least 3 mm at each pole to 230 V 20A disconnect the source power pole When the power switch is shut off it must disconnect all poles Peel off both ends of the cables as shown in the right Take care not to let the cables contact the pipes inside the unit Take enough care to connect the indoor outdoor unit connecting wire correctly be tween the respective indoor units and the outdoor unit rl mm e For the power supply cord and the indoor outdoor unit connecting wires be sure to use the ones in compli ance with the standards Be sure to push the core until it is hidden and pull each cable to make sure that it is not pulled up incomplete insertion may cause a risk of burning the terminal blocks Power supply cord Specification Indoor and Outdoor connecting wire Specification Cable 3 core 2 5 mm in conformity with Design 245 IEC 57 Cable 2 core 1 0 1 5 mm in conformity with Design 245 IEC 57 This installation manual is only for the outdoor unit installation In installing the indoor units refer to the installation manual attached to each indoor unit lt OUTDOOR UNIT gt Indoor outdoor uni
10. nsulation for prevention of condensation 5 4 PURGING PROCEDURES LEAK TEST e Perform the manifold valve work securely according to the installation manual of the manifold valve Perform the purging work on both unit A and unit Ww 7 PURGING PROCEDURES Connect the refrigerant pipes both liquid pipe and gas pipe between the indoor and the outdoor unit v Remove the service port cap of the stop valve on the gas pipe side of the outdoor unit The stop valve will not work in it initial state fresh out of the factory totally closed with cap on Connect the gauge manifold valve and the vacuum pump to the service port of the stop valve on the gas pipe side of the outdoor unit Run the vacuum pump Vacuumize for more than 15 minutes Check the vacuum with the gauge manifold valve then close the gauge manifold valve and stop the vacuum pump Leave it as is for one or two minutes Make sure the pointer of the gauge manifold valve remains in the same position Confirm that the pressure gauge shows 0 101 MPa Gauge 760 mmHg 0 101MPa Compound pressure B unit side Stop valve 760 mmHg gauge for R410A o o Pressure gauge PA for R410A Gauge manifold lt 7 valve for R410A Handle High Charge hose for R410A or the vacuum pump J pump with the Window Z77707 function to Stop valve Se
11. onditioner for cooling Note In case of adding refrigerant comply with the quantify specified for the refrigerating cycle CAUTION For additional charging charge the refrigerant from liquid phase of the gas cylinder If the refrigerant is charged from the gas phase composition change may occur in the refrigerant inside the cylinder and the outdoor unit In this case ability of the refrigerating cycle decreases or normal operation can be impossible However charging the liquid refrigerant all at once may cause the compressor to be locked Thus charge the refrigerant slowly To maintain the high pressure of the gas cylinder warm the gas cylinder with warm water under 40 C during cold season But never use naked fire or steam Stop valve Liquid pipe Gas pipe Outdoor unit Liquid pipe Gas pipe Refrigerant gas cylinder operating valve for R410A Service port Gauge manifold valve for R410A for R410A with siphon Refrigerant liquid Ss Electronic scale for UO I refrigerant charging This product is designed and intended for use in the residential commercial and light industrial environment The product at hand is based on e Low Voltage Directive 73 23 EEC the following EU regulations e Electromagnetic Compatibility Directive 89 336 EEC afa MITSUBISHI ELECTRIC CORPORATION HEAD OFFICE MITSUBISHI DENKI BLDG 2 2 3 MARUNOUCHI CHIYODA KU TOKYO
12. rvice port Hexagonal wrench Stop valve Charge hose for R410A Adapter for prevent the preventing back flow the back flow Remove the gauge manifold valve quickly from the service port of the stop valve o After refrigerant pipes are connected and evacuated fully open all stop valves on both sides of gas pipe and liquid pipe Operating without fully opening lowers the performance and this causes trouble v Pipe length up to 20m Pipe length exceeding 20 m No gas charge is needed Charge the prescribed amount of gas refer to 5 1 Tighten the cap to the service port to obtain the initial status I Retighten the cap Leak test A WARNING When installing or moving the unit do not mix anything other than specified refrigerant R22 into the refrigerating cycle If air is mixed it may cause the refrigerating cycle to get abnormally high temperature causing a risk of burst Tightening torque N m kgf cm Cap for service port 13 7 to 17 7 140 to 180 Cap for stop valve 19 6 to 29 4 200 to 300 5 5 EARTHING WORK Put the earth circuit to the ground in accordance with Technical Standards for Electrical Installation AN CAUTION Do not connect the earth cable to any gas pipe water pipe lightening rod or telephone earth cable If there is some deficiency in earthing work it may ca
13. se a leakage of refrigerant 1 Indoor unit connection e Connect both liquid pipe and gas pipe to indoor unit Apply a thin coat of refrigeration oil to the seat surface of pipe Forconnection align the center of both pipe and union then tighten the first 3 to 4 turns in flare nut by hand For tightening the union part of the indoor unit side use the table below as a standard and tighten the flare nut with two wrenches Excessive tightening damages the flared section door units then put them on pipe having com pleted burr removal not possible to put them on after flaring work Copper pipe Pipe diamete Tightening torque TTI 96 35 mm 13 7 to 17 7 140 to 180 99 52 mm 34 3 to 41 2 350 to 420 912 7 mm 49 0 to 56 4 500 to 575 2 Outdoor unit connection e Connect pipes to the pipe joint part of the stop valve in the same method as the indoor unit For tightening use the same tightening torque applied for indoor unit and tighten the flare nut with torque wrench or spanner INSULATION AND TAPING Cover piping joints with pipe cover For outdoor unit side surely insulate every piping including valves Using piping tape apply taping starting from the entry of outdoor unit e Fix the end of piping tape with adhesive tape e When piping has to be arranged through above ceiling closet or area where the temperature and humidity are high wind additional commercially sold i
14. t connecting wire Refer to the figure below Buni y Tdi GROUND e POWER SUPPLY N 230V 50Hz Remove the service panel Remove fixing screw of terminal cover Connect the indoor outdoor wire and power supply cable to the terminal block Replace the terminal cover securely Cable clamp Terminal cover Route the indoor outdoor connecting wire and he power supply cord along with the unit Firmly tighten the indoor outdoor connecting wire and the power supply cord Power supply cord unit Be sure that the indoor outdoor connecting wire does not contact the stop valve WARNING e Be sure to attach the service panel of the outdoor unit securely otherwise it may result in a fire or an electric shock from dust or water e Use the indoor outdoor unit connecting wire that meets the Standards to connect the indoor and outdoor units and fix the wire to the terminal block securely so that no external force is conveyed to the connecting section of the terminal block Incomplete connection or fixing of the wire could result in a fire e Be sure to attach the terminal block cover on the both indoor and outdoor units If the terminal block cover is incorrectly attached it may cause a risk of fire or electric shock due to dust or water penetra tion 5 INDOOR OUTDOOR UNITS CONNECTIO
15. t legs e Where it is at least 3 m away from the antenna of TV set or radio Otherwise images would be disturbed or noise would be generated e Install the unit at level Note It is advisable to make a piping loop near outdoor unit so as to reduce vibration transmitted from there A WARNING Be sure to install the unit in a place that well sustains its weight Installing in a place with less strength may result in a unit falling causing a risk of injury CAUTION Avoid the following places for installation where air conditioner trouble is liable to occur e Where flammable gas could leak 840 4 Oval holes 10 x 21 e Where there is much machine oil e Salty places such as the seaside e Where sulfide gas is generated such as a hot spring e Where there is high frequency or wireless equipment 360 Unit mm Window l l di i A e When installing the unit in an area that is enclosed aa on four sides such as a verandah be suretoleave Morenthan 200 rnin move than 200 mm behind the unit as shown coun o oof Techn Seve than e When there is a lack of airflow or there is a possi LD More than 200 mm J 200m bility of becoming short cycle install an outlet guide 7 3 and make sure there is enough space behind the Less than 1 200 mm of the rear side of the air inlet front surface side Note Make sure not to install several outdoor units sideways next to each other 4 OUTDOOR UNI
16. tall the unit in a place where an in flammable gas leaks If gas leak and accumulate in the area surround ing the unit it could cause an explosion Fasten a flare nut with a torque wrench as specified in this manual the installation manual Incomplete installation could cause a personal injury due to fire electric shock the unit falling or leakage of water Perform electrical work according to the in stallation manual and be sure to use an ex clusive circuit If the capacity of the power circuit is insufficient or there Is insufficient electrical work it could re sult in a fire or an electric shock Attach the electrical cover to the indoor unit and the service panel to the outdoor unit securely If the electrical cover in the indoor unit and or the service panel in the outdoor unit are not attached securely it could result in a fire or an electric shock due to dust water etc Be sure to use the part provided or specified parts for the installation work The use of defective parts could cause an injury due to a fire an electric shock the unit falling leakage of water etc Be sure to cut off the main power in case of setting up the indoor electronic control P C board or wiring works It could cause an electric shock The appliance shall be installed in accordance with national wiring regulations When fastened too tight a flare nut may broken af ter along period and cause a leakage of refrigerant Instal
17. use a risk of electric shock The product incorporates a frequency inverter and so requires earthing in order to observe electric charge and noise caused by static electricity 5 6 CHECKING AFTER INSTALLATION After finishing the installation check the following items again by making Have special circuits been provided Is power supply voltage as specified Has indoor outdoor connecting wire been inserted into terminal block Has indoor outdoor connecting wire been secured firmly Has intermediary connection between power cable and indoor outdoor connecting wire been carried out Is combination of connection pipes and indoor outdoor connecting wire correct Room A Room B Is earth cable connection correct Has leak test been carried out Has air purge been carried out Is stop valve fully open Has drain discharge been checked Is insulation over connection pipe joints correct Is strength of installation location well enough Have all of A WARNING and A CAUTION items in 1 THE FOLLOWING SHOULD ALWAYS BE OB SERVED FOR SAFETY been checked 5 7 GAS CHARGE Perform gas charge to unit A or B Connect gas cylinder to the service port of stop valve Perform air purge of the pipe or hose coming from refrigerant gas cylinder Replenish specified amount of the refrigerant while operating the air c
18. wab S Valve size for outdoor unit connection pipe size MSC 07 Liquid pipe 06 35 mm 96 35 mm A UNIT Liquid pipe 96 35 mm MSC 09 Gas pipe 99 52 mm 99 52 mm Gas pipe 99 52 mm Liquid pipe 06 35 mm 96 35 mm Liquid pipe 96 35 mm MSC 12 B UNIT SQ Gas pipe 912 7 mm 912 7 mm Gas pipe 99 52 mm If the diameter of connection pipes does not match the diameter of pipe end connections use optional different diameter joints e When connecting the model MSC A12 to either outdoor unit A or B use optional different diameter joints MAC A454JP because the valve size of gas pipes for the outdoor unit is 99 52 mm PIPING PREPARATION If you use commercially available copper pipes use the following table for pipe specifications Outside diameter Wall thickness Liquid pipe 96 35 mm 0 8 mm Gas pipe 09 52 mm 0 8 mm Gas pipe 912 7 mm 1 0 mm 4 Flaring work e Perform flaring work using flaring tool as shown in the right For insulation material use 8 mm thick heat insulating expended polyethylene with a specific grarity of 0 045 Ensure that the 2 refrigerant pipes are insulated to prevent condensation Refrigerant pipe bending radius must be 100 mm or more CAUTION Be sure to use the insulation of specified thickness Excessive thickness may cause incorrect installa tion of the indoor unit and lack of thickness may cause dew drippage 5 2 FLARING WORK Main cause of
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