Mitsubishi Electric 2.5KKC Installation Manual Download Page 1

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Air-Conditioners

PLH-2, 2.5KKC

FOR INSTALLER

INSTALLATION MANUAL

For safe and correct use, please read this installation manual thoroughly before installing the air-conditioner unit.

ON/OFF –

STAND BY
DEFROST

CENTRALLY CONTROLLED

˚C

CLOCK

ON OFF

˚C

1Hr.

NOT AVAILABLE

CHECK MODE

FILTER

CHECK

TEST RUN

Summary of Contents for 2.5KKC

Page 1: ...INSTALLATION MANUAL For safe and correct use please read this installation manual thoroughly before installing the air conditioner unit ON OFF STAND BY DEFROST CENTRALLY CONTROLLED C CLOCK ON OFF C 1Hr NOT AVAILABLE CHECK MODE FILTER CHECK TEST RUN ...

Page 2: ... manuals in a place where they are accessible at any time If the air conditioner must be moved or repaired these manuals should be made available to the service per sonnel These manuals should be kept with the air conditioner at all times and passed on to subsequent users Warning The unit should not be installed by the user Ask the dealer or an authorized technician to install the unit If the unit...

Page 3: ...electric work must be performed by a licensed technician ac cording to local regulations and the instructions given in this manual The units should be powered by dedicated power lines Power lines with insufficient capacity or improper electrical work may result in electric shock or fire The terminal block cover of the outdoor unit must be firmly at tached to prevent entry of dust and moisture Impr...

Page 4: ...ormance and damage the internal parts 1 Safety Precautions 1 1 Before installation and electric work Fuse or breaker A Fuse or breaker B Main power switch C Power supply wiring Disconnection must be incorporated in the fixed wiring Caution When installing the power lines do not apply tension to the ca bles as this could loosen the connections generate heat and cause a fire Use only a fuse of speci...

Page 5: ...ore installation and electric work Caution Be extremely careful when transporting the units Two or more persons are needed to handle the unit as it weighs 20 kg or more Do not grasp the bands of the crate Instead insert your hands into the cutouts in the crate Wear protective gloves to extract the unit from the crate and to move it as you could injure your hands on the fins or other parts Transpor...

Page 6: ...e than twelve hours before starting operation Starting operation just after turning the main power switch on can result in severe damage to internal parts Keep the main power switch turned on during the operation sea son Keep the outlets and inlets free of obstacles Otherwise the per formance may be reduced or operation may stop 1 2 Before starting the trial run Caution Do not touch any switch wit...

Page 7: ... high frequency welders etc Avoid locations where the airflow is directed at a fire alarm sensor Hot air could trigger the alarm during the heating operation Avoid places where acidic solutions are frequently handled Avoid places where sulphur based or other sprays are frequently used 2 2 Service space Select ideal blowing direction according to the shape of room and in stalling position A Ceiling...

Page 8: ...00 185 330 PUH 2 5 870 295 850 500 185 330 Avoid locations where combustible gas may leak settle or be gener ated Avoid locations exposed to direct sunlight or other sources of heat If direct sunlight cannot be avoided always install a sunshade to pro tect the outdoor unit from the sun Select a location from which noise emitted by the unit will not incon venience neighbours Bear in mind that durin...

Page 9: ... 4 Obstacles in the front blowing side only If there are obstacles in front of the unit keep the back left right top unobstructed I Min 500 mm 5 Obstacles at the front rear only The outdoor unit cannot be used except if the following conditions are met An optional outdoor air outlet guide left right top unobstructed must be fitted Moreover if there is no natural wind flowing between the obstacles ...

Page 10: ...lectric wiring cannot be attached on the right side 2 Face to face arrangement with air outlet guide Fit an optional outdoor air outlet guide on each unit and set them to up ward blow F Min 200 mm G Min 500 mm 3 Face to face arrangement without air outlet guides H Min 200 mm I Min 1200 mm A B C E D F G H I 1 2 3 3 2 Ventilation and service space 4 Parallel arrangement with air outlet guides Fit an...

Page 11: ...optional air outlet guide and if the unit is installed at a place where the powerful blast of a typhoon etc comes directly into the air outlet A Air outlet guide 3 Position the unit so that the air outlet blows perpendicularly to the seasonal wind direction if possible B Wind direction 4 Installing the indoor unit 4 1 Check the indoor unit accessories and parts The indoor unit comes with the follo...

Page 12: ...tween them becomes identical Use M10 3 8 suspension bolts Suspension bolts are to be procured at the field Install securely ensuring that there is no clearance between the ceil ing panel grille and between the main unit grille 4 2 Ceiling Openings and Suspension Bolt Installation Locations In case of installing the optional high efficiency filter element filter case ment the dimension between tran...

Page 13: ...ille and set so that the unit is installed horizontally A Unit B Grille C Pillow 4 3 Suspension Structure Give site of suspension strong structure 1 Wooden structures Use tie beams single storied houses or second floor beams two story houses as reinforcing members Wooden beams for suspending air conditioners must be sturdy and their sides must be at least 6 cm long if the beams are separated by no...

Page 14: ...ures given in parentheses represent the dimensions in case of install ing optional high efficiency filter element filter casement 1 In advance set the parts onto the suspension bolts in the order of the washers with insulation washers without insulation and nuts dou ble Fit the washer with cushion so that the insulation faces downward In case of using upper washers to suspend the main unit the low...

Page 15: ...it As for the details of fitting refer to the instructions given on the Instal lation template A Main unit B Ceiling panel C Installation template attached to the crating materials D 4 screw with the washers Accessory Caution It is best to transport the unit in its original packaging to the in stallation site Since the centre of gravity of the unit is off centre caution is nec essary when lifting ...

Page 16: ...2 Charging refrigerant 1 Refrigerant amount This product needs no additional charging of refrigerant for a pipe length of 30 m or less If the pipe length is longer than 30 m add refrigerant according to the table shown below To add refrigerant use the check valve connected to the low pressure pipe inside the outdoor unit Models Allowable pipe Amount of additional refrigerant kg length m 31 40 m 41...

Page 17: ...it is shipped with valve shut After all piping connections between indoor and outdoor unit have been completed vaccuum purge air from system through the service port for the stop valve on the outdoor unit After completing procedures 1 1 or 1 2 above open outdoor unit stop valves stem fully This completes connection of refrigerant cir cuit between indoor and outdoor units Stop valve instructions ar...

Page 18: ...se two spanners to tighten the flare nuts 3 When racking the pipes keep the racking below the top of the piping cover to allow easy service panel removal I Racking 6 4 Refrigerant piping 3 Specified tightening torques use a torque wrench Torque specifications Outer dia of copper tube mm Tightening torque kg cm ø9 52 350 420 ø15 88 750 800 If a torque wrench is not available the following method ma...

Page 19: ... a support metal in the middle to prevent drain pipe movement H Air bleeder I Raised J Odor trap Do not install air bleeder raisers and odor traps 6 5 Drainage Piping Work Grouped piping A VP O D ø32 PVC TUBE B Make it as large as possible C Indoor unit D Make the piping size large for grouped piping E Downward slope 1 100 or more F VP30 O D ø38 PVC TUBE for grouped piping 9 mm or more insulation ...

Page 20: ...in pipe VP 25 I Insulating material locally purchased J Transparent PVC pipe K VP 25 locally purchased Slope 1 100 or more 7 Electrical work 7 1 Precautions s Supply power from independently branched circuit s Wiring should conform to applicable standards s Route wires connecting indoor and outdoor units and power sup ply wires separately so that they do not contact each other out side of the unit...

Page 21: ...ontroller switch box Be sure to observe the following precautions 1 The temperature sensors are located on both remote controller and indoor unit To use the temperature sensor on the remote controller mainly use the remote controller for temperature setting or room tem perature detection Install the remote controller in such an area that can detect average room temperatures free of direct sunlight...

Page 22: ... as above B 1 To lead the remote controller cord from the back of the control ler B 2 To run the remote controller cord through the upper portion C Wall D Conduit E Lock nut F Bushing G Switch box H Remote controller cord I Seal with putty 7 3 Remote controller 1 Installing procedures 3 Install the lower case in the switch box or on the wall A For installation in the switch box C Switch box for tw...

Page 23: ...e remote controller cord connected to the terminal block 3 Cross section diagram Attach remote control cord clamp 6 to the wall using wood screw 4 and then set the remote control cord in position as shown below A 1 B B 2 A 1 2 C 4 3 2 6 4 1 2 6 7 3 Remote controller 2 Connecting procedures 3 Connect the lower case connector to the upper case connector CN1 Caution After connection do not allow the ...

Page 24: ... remote controller is viewed from the back DIP switches SW17 SW18 will apear at the positions shown in the diagram on the right Ajust these switches to set the correct remote control address and other functions ON OFF DIP switch settings are as shown below 1 ON setting 2 OFF setting Set the remote control addres by adjusting switches 1 6 of SW17 DIP switch position for for address and other functi...

Page 25: ...older when wiring using the wiring conduit in the rear L Wiring conduit holder Not necessory in other cases Fix power source wiring to control box by using buffer bushing for tensile force PG connection or the like connect transmission wiring to trans mission terminal block through the knockout hole of control box using or dinary bushing 4 After piping wiring is completed fill up the clearance bet...

Page 26: ...nals of that slave unit to the terminals of the next unit and so on until all units are con nected The total cord length of the remote controller and the connection among units should not exceed 500 metres A A B C G E F I H J J D B E F A B A C A D 7 5 Power supply wiring diagram exam ple Electric wiring should be done according to the appropriate wiring dia gram for the model being installed For e...

Page 27: ...sired one among the settings given in the following table Note 1 Be sure to execute the setting otherwise the airflow may not reach the desirable point or other problems may occur Note 2 Switch setting is required for other cases than enclosed in rec tangle As for the layout of the switches refer to the previous sec tion Note 3 In case of setting SWB be sure to confirm that the setting matches wit...

Page 28: ...n power supply While the room temperature display on the remote controller reads CENTRALLY CONTROLLED the remote controller is disabled Turn off the CENTRALLY CONTROLLED display before using the remote controller 2 Press TEST RUN button twice A The TEST RUN indicator should light up 3 Press button Cooling drying mode Cool air should start to blow Heating mode Warm air should start to blow after a ...

Page 29: ...up only for the indoor unit connected to the outdoor unit address 0 8 4 Check of Drainage At the of trial run ensure the water is being properly drained out and that no water is leaking from joints Always make this check at the time of installation during other air conditioning cooling season Similarly check it also before finishing the ceiling of new premises 1 Remove the cover of water supply in...

Page 30: ...ng error If there are overlapping slave addresses the system shows P7 followed by the overlap ping unit number The same as on the left The same as on the left Nothing is displayed on the remote controller Cause 1 Wrong indoor outdoor connections or a re verse phase in the power line to the outdoor unit 2 Improper setting of the remote controller or the indoor unit address 3 Wrong connections or a ...

Page 31: ... 3 3 4 4 3 0 8 0 5 or Cable 3C 0 3 Polar Cable 2C 0 69 This wire is accessory of remote controller Wire length 10m Non polar Indoor unit Outdoor unit DC 12V Remote controller Indoor unit DC 12V Single phase 50Hz 240V Wiring Notes 1 Bear in mind ambient conditions ambient temperature direct sunlight rain water etc when proceeding with the wiring and connections 2 The wire size is the minimum value ...

Page 32: ... 2 0 2 3 11 2 Preparing to attach the grille With the gauge 3 supplied with this kit adjust and check the position ing of the unit relative to the ceiling If the unit is not properly posi tioned relative to the ceiling it may allow air leaks or cause condensa tion to collect Make sure that the opening in the ceiling is within the following toler ances 690 690 710 710 Make sure that step A is perfo...

Page 33: ...ling the grille s s s s s This grille can be installed according to the customer s request for example facing the grille A Refrigerant piping side B Drainage piping side C Brand label 1 Standard 2 Change 90 angle 1 Tacking Please attach the hook 6 to the unit in advance using the tapping screw 5 as shown Adjust the position of the grille and place the grille in the unit Make sure that the hook wil...

Page 34: ...4 Check Make sure that there is no gap between the unit and the grille or be tween the grille and the surface of the ceiling If there is any gap be tween the unit and the grille or between the grille and the surface of the ceiling it may cause dew to collect Make sure that the wires have been securely connected 11 5 Installing the intake grille Install them by performing in reverse the procedure d...

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Page 36: ...BG79S983H01 Printed in Japan HEAD OFFICE MITSUBISHI DENKI BLDG 2 2 3 MARUNOUCHI CHIYODA KU TOKYO 100 8310 JAPAN ...

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