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(SPLIT TYPE) Installation Manual

1. i Amount of additional Diameter of connecting pipe refrigerant per meter Amount of additional refrigerant g liquid side g m Amount of refrigerant added for main pipe amount of refrigerant added for branch piping 41 42 43 a B D12 7 9 5 9 5 80 40 a x 41 28 Bx 42 43 4 Simultaneous triple Amount of additional Amount of additional refrigerant g Diameter of connecting pipe liquid side refrigerant per meter Amount of refrigerant added for main pipe g m amount of refrigerant added for branch 41 42 43 44 a B piping D12 7 9 5 9 5 9 5 80 40 a x 1 28 Bx 42 3 24 6 Simultaneous double twin Diameter of connecting pipe Amount of additional Amount of additional refrigerant g liquid side refrigerant per meter g m Amount of refrigerant added for main pipe Outdoor unit amount of refrigerant added for first 41 42 03 24to 27 oi B y branch piping amount of refrigerant added for second branch piping ax 21 28 Bx 02 23 4 SM2244 012 7 9 5 6 4 80 40 20 yx 44 45 6 47 ax 1 28 Bx 42 233 4 SM2804 012 7 29 5 9 5 80 40 40 yx 44 45 6 27 16 EN Digital Inverter 7 EN ELECTRICAL WORK WARNING 1 Using the specified wires ensure that the wires are connected and fix wires securely so that the external tension to the wires does not affect the connecting part of the terminals Inc
2. and the public system It is the responsibility of the installer or user of the equipment to ensure by consultation with the distribution network operator if necessary that the equipment is connected only to a supply with a short circuit power Ssc greater than or equal to Ssc 1 Ssc 1 Model Ssc MVA RAV SM2244AT8 Z ZG E 1 41 RAV SM2804AT8 Z ZG E 1 72 Contents 1 ACCESSORY PARTS ili illa eeeh ail 2 2 SAFETY PRECAUTIONS ibi RA REIT sd is ahi fe Re RR aa A p 8 ae 3 3 INSTALLATION OF NEW REFRIGERANT AIR CONDITIONER 4 4 INSTALLATION CONDITIONS i rum m mm xn 6 5 REFRIGERANT PIPING 2322 eend sos oom pelato 10 6 AIRPURGING iaananevvatenermosnanekbekahdecharmanadseebetattravssantsden 14 7 ELECTRICAL WORKS ss 5235 RaaE xaxa Eh d EE ERE EEUU E EEEcR E RR REDE dE 17 S EARTHING i es 3359F Gees RO ln en 19 9 WFINISHINO as db les TP PTTPTTTTSPT 20 10 TEST RUN essentie nternet Ve de end een 20 11 ANNUAL MAINTENANGE eee eee eee eee 20 12 AIR CONDITIONER OPERATING CONDITIONS eene 20 13 FUNCTIONS TO BE IMPLEMENTED LOCALLY 0022 eee eee ees 21 14 TROUBLESHOOTING 5 soman casted RCACR RE RA RIENTRARE 22 159 APPENDIX 6223605 5930465446556 0 06 6 66 TERREI iena 24 Digital Inverter 1 ACCESSORY PARTS B Accessory Parts Part name Q ty Shape Usage Installation manual 1 Hand this directly to the customer CD Drain
3. counterclockwise by 90 until it hits the stopper Full open Charge port Flare nut Handle position Closed completely Opened fully Movable part of valve Stem Main stopper While the valve is fully opened after the screwdriver has reached the stopper do not apply torque exceeding 5 N m Applying excessive torque may damage the valve Valve handling precautions Openthe valve stem until it strikes the stopper It is unnecessary to apply further force Securely tighten the cap with a torque wrench Cap tightening torque 50 to 62 Nem 5 0 to 6 2 kgfem 20 to 25 Nem 2 0 to 2 5 kgfem 14 to 18 Nem 1 4 to 1 8 kgfem 012 7 mm Valve size 19 1 mm Charge port 15 B insulating the Pipes e The temperatures at both the liquid side and gas side will be low during cooling so in order to prevent condensation be sure to insulate the pipes at both of these sides Insulate the pipes separately for the liquid side and gas side Insulate the branch pipes by following the instructions in the installation manual provided with the branch pipe kit Usethe insulating material provided as an accessory to insulate the 219 1 mm pipe at the gas side Seal the area where the 219 1 mm pipe and 022 2 to 028 6 mm pipe are connected so that no gaps are left REQUIREMENT Be sure to use an insulating material which can withstand temperatures above 120 C for the gas side pipe si
4. following table to identify the cause Verifying an abnormal state in the past although the abnormal state no longer occurs 1 Set bit 1 of DIP switch SW803 to ON 2 Jot down the states of LED800 to LED804 Display mode 1 3 4 Find an error whose display mode 1 equals the LED states jotted down and display mode 2 equals the current flashing Press SW800 for at least 1 second The LED status changes to display mode 2 states of LED800 to LED804 from the following table to identify the error An outside air temperature TO sensor error can be checked only while it occurs 22 EN Digital Inverter Display mode 1 Display mode 2 D800 D801 D802 D803 D804 D800 D801 D802 D803 D804 o z 9 Cause Normal Discharge TD sensor error Heat exchanger TE sensor error Heat exchanger TL sensor error Outside air temperature TO sensor error Suction TS sensor error Heat sink TH sensor error ol ND aj A oj N gt Outdoor temperature sensor TE TS connection error Outdoor EEPROM error 10 Compressor lock e 11 Compressor lock 12 Current detection circuit error 13 Thermostat for compressor activated 14 Model data not set on the service P C board 15 MCU MCU communication error 16 Discharge temperature error 17 Abnormal power open phase detected or abnormal voltage 18 Heat sink overheat 19 Gas leak detect
5. gas charged from the service port to the design pressure 4 15 MPa to conduct the airtight test After the airtight test is completed evacuate the nitrogen gas B Air Purge With respect to the preservation of the terrestrial environment adopt Vacuum pump to purge air Evacuate air in the connecting pipes when installing the unit Donotdischarge the refrigerant gas to the atmosphere to preserve the terrestrial environment Use a vacuum pump to discharge the air nitrogen etc that remains in the set If air remains the capacity may decrease For the vacuum pump be sure to use one with a backflow preventer so that the oil in the pump does not backflow into the pipe of the air conditioner when the pump stops If oil in the vacuum pump is put in an air conditioner including R410A it may cause trouble with the refrigeration cycle Compound pressure gauge 101 kPa E C76 cmHg 34 Handle Low Pressure gauge Gauge manifold valve Handle High Keep fully closed Charge hose Keep fully closed For R410A only Vacuum pump adapter for counter flow AC prevention Charge port Valve core Setting pin Packed valve at gas side 14 Vacuum pump As shown in the figure connect the charge hose after the manifold valve is closed completely y Attach the connecting port of the charge hose with a projection to push the valve core setting pin to the ch
6. it Install a new pipe instead e The pipe has been opened disconnected from indoor unit or outdoor unit for a long period The pipe has been connected to an outdoor unit that does not use refrigerant R22 R410A or R407C e The existing pipe must have a wall thickness equal to or larger than the following thicknesses Reference outside Wall thickness diameter mm mm Material 64 0 8 9 5 0 8 12 7 0 8 m 15 9 1 0 19 1 12 22 2 1 0 Half hard 28 0 1 0 Half hard Do not use any pipe with a wall thickness less than these thicknesses due to insufficient pressure capacity EN 21 Digital Inverter 14 TROUBLESHOOTING You can perform fault diagnosis of the outdoor unit with the LEDs on the P C board of the outdoor unit in addition to using the check codes displayed on the wired remote controller of the indoor unit Use the LEDs and check codes for various checks Details of the check codes displayed on the wired remote controller of the indoor unit are described in the Installation Manual of the indoor unit Verifying current abnormal status 1 Check that DIP switch SW803 is set to OFF 2 Jot down the states of LED800 to LED804 Display mode 1 3 4 Check the code whose display mode 1 equals the LED states jotted down and display mode 2 equals the current flashing Press SW800 for at least 1 second The LED status changes to display mode 2 status of LED800 to LED804 from the
7. m Handling Existing Pipe When using a 019 1 mm gas pipe for the existing piping set bit 3 of SW802 switch for existing pipe on the P C board of the outdoor unit to ON In this case the heating performance may be reduced depending on the outside air temperature and room temperature When using the existing pipe carefully check for the following Wall thickness within the specified range Scratches and dents Water oil dirt or dust in the pipe SW802 Flare looseness and leakage from welds ai F Deterioration of copper pipe and heat insulator Wnen shipped Trom factory When using existing pipe Before recovering the refrigerant in the existing system CEs CE perform a cooling operation for at least 30 minutes CE E EN om Cautions for using existing pipe OLE SCE Do not reuse a flare nut to prevent gas leaks Replace it with the supplied flare nut and then process it g to a flare B Recovering Refrigerant Blow nitrogen gas or use an appropriate means to keep Use the refrigerant recovery equipment to recover the the inside of the pipe clean If discolored oil or much refrigerant residue is discharged wash the pipe Check welds if any on the pipe for gas leaks There may be a problem with the pressure resistance of the branching pipes of the existing piping Replace them with branch pipes sold separately When the pipe corresponds to any of the following do not use
8. the Gas Side Pipe 1 Cut the pipe with a pipe cutter Be sure to remove burrs that may cause a gas leak REQUIREMENT 2 Insert a flare nut into the pipe and then flare the pipe Use the flare nuts supplied with the air conditioner or Be sure to use the 19 1 mm pipe and joint provided as those for R410A accessories of the outdoor unit to connect the gas side Insert a flare nut into the pipe and flare the pipe 19 1 mm pipe and 228 6 mm pipe As the flaring sizes of R410A differ from those of When leading out the pipes toward the front to one of the refrigerant R22 the flare tools newly manufactured for sides or toward the rear use the 19 1 mm pipe and R410A are recommended elbow provided as accessories of the outdoor unit and However the conventional tools can be used by adjust the bending direction Cut the 019 1 mm pipe to adjusting the projection margin of the copper pipe the required length before using it Projection margin in flaring B Unit mm B 1 Align the provided 19 1 mm pipe with the pipe lead out y direction and shape it so that its end comes out from the outdoor unit 2 Z 2 On the outside of the outdoor unit use the provided wb joints and braze the 19 1 mm pipe and 228 6 mm pipe Rigid Clutch type Conventional tool Outer diam of R410A tool used used copper pipe pen Pp R410A 9 5 12 7 1 0 to 1 5 Joint accessory 0 to 0 5 Joint 15 9 acces
9. use of floor space individual control energy conservation by curtailing heat and carrying power etc Most importantly the multi air conditioner system is able to replenish a large amount of refrigerant compared with conventional individual air conditioners If a single unit of the multi conditioner system is to be installed in a small room select a suitable model and installation procedure so that if the refrigerant accidentally leaks out its concentration does not reach the limit and in the event of an emergency measures can be made before injury can occur In a room where the concentration may exceed the limit create an opening with adjacent rooms or install mechanical ventilation combined with a gas leak detection device The concentration is as given below Total amount of refrigerant kg Min volume of the indoor unit installed room m3 lt Concentration limit kg m The concentration limit of R410A which is used in multi air conditioners is 0 3kg m NOTE 1 If there are 2 or more refrigerating systems in a single refrigerating device the amounts of refrigerant should be as charged in each independent device Outdoor unit e g MT amount 15kg e g charged amount 10kg Indoor unit For the amount of charge in this example The possible amount of leaked refrigerant gas in rooms A B and C is 10kg The possible amount of leaked refrigerant gas in rooms D E and F is 15kg Important NOTE
10. 2 The standards for minimum room volume are as follows 1 No partition shaded portion When there is an effective opening with the adjacent room for ventilation of leaking refrigerant gas opening without a door or an opening 0 1596 or larger than the respective floor spaces at the top or bottom of the door Outdoor unit Val Refrigerant piping if LM Indoor unit If an indoor unit is installed in each partitioned room and the refrigerant piping is interconnected the smallest room of course becomes the object But when a mechanical ventilation is installed interlocked with a gas leakage detector in the smallest room where the density limit is exceeded the volume of the next smallest room becomes the object Refrigerant piping unit Indoor unit Medium room Large room Mechanical ventilation device Gas leak detector NOTE 3 The minimum indoor floor area compared with the amount of refrigerant is roughly as follows When the ceiling is 2 7m high a Range below the density limit of o 0 3 kg m countermeasures not needed Range above the density limit of 0 3 kg m countermeasures needed Min indoor floor area 10 20 30 g Total amount of refrigerant kg DH91301299
11. 4 units PC board settings are required for some of the indoor units if they are to be used in a twin triple or double twin system Refer to the instructions in the installation manual of the branch pipe kit and ensure that the settings are selected correctly Combination with the indoor units Combination with the indoor units is possible only when units with the same type are combined Combinations of units with different types cannot be used Digital Inverter 2 EN SAFETY PRECAUTIONS Ensure that all Local National and International regulations are satisfied Read these SAFETY PRECAUTIONS carefully before installation The precautions described below include important items regarding safety Observe them without fail After the installation work perform a trial operation to check for any problem Follow the Owner s Manual to explain to the customer how to use and maintain the unit Ask the customer to keep the Installation Manual together with the Owner s Manual Z WARNING Ask an authorized dealer or qualified installation professional to install maintain the air conditioner Perform installation work properly according to the Installation Manual Inappropriate installation may result in water leakage electric shock or fire Be sure to connect earth wire grounding work Incomplete grounding cause an electric shock Do not connect ground wires to gas pipes water pipes lightning rods or grou
12. 410A only Do not use for refrigerant R22 or R407C etc Conventional tools equipment are available Tools equipment Use How to use tools equipment Gauge manifold Charging hose Vacuuming charging refrigerant and operation check Prepared newly for R410A only Prepared newly for R410A only Charging cylinder Can not be used Unusable Use the refrigerant charging measure instead Gas leak detector Gas leak check Prepared newly Vacuum pump Vacuum drying Unusable Vacuum pump with backflow prevention function Vacuum drying R22 Conventional tools Flare tool Flare machining of pipes Usable if dimensions are adjusted Bender Bending pipes R22 Conventional tools Refrigerant recovery equipment Refrigerant recovery Z For R410A only Torque wrench Tightening flare nuts AN Exclusive for 212 7 mm and 219 1 mm Pipe cutter Cutting pipes R22 Conventional tools Welding machine and nitrogen cylinder Welding pipes R22 Conventional tools Refrigerant charging measure Charging refrigerant R22 Conventional tools B Refrigerant Piping New refrigerant R410A When using the conventional piping When using the conventional piping with no indication of applicable refrigerant types be sure to use it with a wall thickness of 0 8 mm for 26 4 mm 29 5 mm and 012 7
13. Check the following before starting a test run That all pipes are connected securely without leaks That the valve is open If the compressor is operated with the valve closed the outdoor unit will become overpressurized which may damage the compressor or other components If there is a leak at a connection air can be sucked in and the internal pressure further increases which may cause a burst or injury Operate the air conditioner in the correct procedure as specified in the Owner s Manual 11 ANNUAL MAINTENANCE For an air conditioning system that is operated on a regular basis cleaning and maintenance of the indoor outdoor units are strongly recommended As a general rule if an indoor unit is operated for about 8 hours daily the indoor outdoor units will need to be cleaned at least once every 3 months This cleaning and maintenance should be carried out by a qualified service person Failure to clean the indoor outdoor units regularly will result in poor performance icing water leaking and even compressor failure 12 AIR CONDITIONER OPERATING CONDITIONS For proper performance operate the air conditioner under the following temperature conditions Cooling operation Dry valve temp 15 C to 46 C Heating operation Wet valve temp 20 C to 15 C If air conditioner is used outside of the above conditions safety protection may work 20 EN Digital Inverter 13 FUNCTIONS TO BE IMPLEMENTED LOCALLY
14. Indoor Outdoor LE i aN connecting wires Indoor power Outdoor side inter unit wiring 380 415 V 3N 50Hz 380 V 3N 60Hz Remote controller Remote controller inter unit wiring Remote controller wiring T F ar Indoor side Indoor side Indoor Outdoor IL connecting wires Indoor power inter unit wiring Outdoor side need ms 415 V 3N 50Hz 380 V 3N 60Hz Triple Remote controller inter unit wiring Remote controller inter unit wiring Indoor power inter unit wiring Indoor power inter unit wiring Double twin Use 2 core shield wire MVVS 0 5 to 2 0 mm or more for the remote controller wiring in the simultaneous twin simultaneous triple and simultaneous double twin systems to prevent noise problems Be sure to connect both ends of the shield wire to earth leads systems 18 Connect earth wires for each indoor unit in the simultaneous twin simultaneous triple and simultaneous double twin EN Digital Inverter EN Stripping length power cord and connecting wire Indoor outdoor Power supply wire connecting wire 10 1 2 3 10 L1L2L3 N Edd dd sc ac RDUM tH a4 d o i III opb dp dU d mani IL Cg d Earth screw i 23 Earth screw Li L2
15. Keep a distance 500 mm or more between the unit and wall surface 500 mm 2 Consider the wind direction during the operational season of the air conditioner and install the unit so that the discharge port is set at a right angle relative to the wind direction Strong wind Strong wind E HTT e When using an air conditioner under low outside temperature conditions Outside temp 5 C or lower in COOL mode prepare a duct or wind shield so that it is not affected by the wind lt Example gt Wind shield Wind shield Digital Inverter B Necessary Space for Installation Unit mm Obstacle at rear side Upper side is free 1 Single unit installation e uL X 2 Obstacles on both right and left sides 150 or more The height of the 200 or the outdoor unit 250 or more 3 Serial installation of two or more units 4 D V U A Lina T Te T 4 150 or 250 or 250 or 250 or more more more more The height of the obstacle should be lower than the height of the outdoor unit Obstacle also above unit 150 or more more o e o 1 obstacle should be lower than the height of 200 or more AAA Obstacle in front Above unit is free 1 Single unit installation oO gt op 2 if 7777777777 2 Serial installation of two or more units ar 1 000 or more Obstacle
16. L3 N L_ T Y okel c 50 50 A 30 40 mm Earth line DNN Earth line 7 Connecting wire Power supply wire Cord clamp Cord clamp Clamp filter accessory Cord clamp Cord clamp WARNING Be sure to attach the provided clamp filter to the power supply wire in order to conform to EMC standards EARTHING WARNING e Be sure to connect the earth wire grounding work Incomplete grounding may cause an electric shock Connect the earth line properly following applicable technical standards Connecting the earth line is essential to preventing electric shock and to reducing noise and electrical charges on the outdoor unit surface due to the high frequency wave generated by the frequency converter inverter in the outdoor unit If you touch the charged outdoor unit without an earth line you may experience an electric shock 19 Digital Inverter 9 FINISHING After the refrigerant pipe inter unit wires and drain pipe have been connected cover them with finishing tape and clamp them to the wall with off the shelf support brackets or their equivalent Keep the power wires and indoor outdoor connecting wires off the valve on the gas side or pipes that have no heat insulator 10 TEST RUN Turn on the leakage breaker at least 12 hours before starting a test run to protect the compressor during startup To protect the compressor power is supplied from the 380 415 VAC input to the unit to preheat the compressor
17. N for existing pipe Refer to the table diameter below Be sure to set the contents in the table below For RA10A 17 22 36 in order to restrict the refrigerating cycle pressure of Ea oe Samo as the equipment in the pipe standard above Existing pipe SW 2 Flare machining size A Switch Bit 3 of SW802 gt ON Copper pipe outer 6 4 9 5 0127 diameter For R410A 9 1 13 2 16 6 For R22 9 0 13 0 16 2 Airtight test Vacuum dry Refrigerant charge Gas leak check Trial run EN 25 Becomes a little larger for RA10A Do not apply refrigerator oil to the flare surface WARNINGS ON REFRIGERANT LEAKAGE Check of Concentration Limit The room in which the air conditioner is to be installed requires a design that in the event of refrigerant gas leaking out its concentration will not exceed a set limit The refrigerant R410A which is used in the air conditioner is safe without the toxicity or combustibility of ammonia and is not restricted by laws to be imposed which protect the ozone layer However since it contains more than air it poses the risk of suffocation if its concentration should rise excessively Suffocation from leakage of R410A is almost non existent With the recent increase in the number of high concentration buildings however the installation of multi air conditioner systems is on the increase because of the need for effective
18. TOSHIBA Leading Innovation gt gt gt AIR CONDITIONER SPLIT TYPE HFC Installation manual Outdoor Unit Model name RAV SM2244AT7 RAV SM2804AT 7 RAV SM2244AT7Z RAV SM2804AT7Z RAV SM2244AT7ZG RAV SM2804AT7ZG RAV SM2244AT8 E RAV SM2804AT8 E RAV SM2244AT8Z E RAV SM2804AT8Z E RAV SM2244AT8ZG E RAV SM2804AT8ZG E TOSHIBA SS 2 ZI 4 SG i LLL LA SSS EER 7 A SS A T Yh RR meee rr m EER SS SI SL Yj HH NS WS NS AN f W SS M NN ss 2 SAW S CCR p zz ZZZ Lg i 27 NS f HME MEM Yz NZ SEZ e z Z SI IE SS I NSS S English Digital Inverter Please read this Installation Manual carefully before installing the Air Conditioner This Manual describes the installation method of the outdoor unit For installation of the indoor unit follow the Installation Manual attached to the indoor unit ADOPTION OF NEW REFRIGERANT This Air Conditioner is a new type that has adopted a new refrigerant HFC R410A instead of the conventional refrigerant R22 in order to prevent destruction of the ozone layer This equipment complies with IEC 61000 3 12 provided that the short circuit power Ssc is greater than or equal to Ssc 1 at the interface point between the user s supply
19. also at the above unit 4 1 000 or more a 800 or more Obstacles in both front and rear of unit Open above and to the right and left of the unit The height of an obstacle in both the front and rear of the unit should be lower than the height of the outdoor unit Standard installation 1 Single unit installation Sp oo OE P457 49 49 4 407 45 LLL y i o a GO e5 o PETIT 2 Serial installation of two or more units 5g oo SE LLL LL E E E C C I C Cu Cu a a a a X i i i L A 250 200 5 or or g more i i more 3 1 f EN Digital Inverter Serial installation in front and rear Open above and to the right and left of the unit The height of an obstacle in both the front and rear of the unit should be lower than the height of the outdoor unit Standard installation Pu cu 1 000 or 300 or 1 500 or 2 000 or 200 or more more more more more B installation of Outdoor Unit e Before installation check the strength and horizontalness of the base so that abnormal sounds do not emanate e According to the following base diagram fix the base firmly with the anchor bolts Anchor bolt nut M10 x 4 pairs 150 600 150 S 8 Knockout Noe hole Drain nipple mounting hole Asshownin the figure below install the foundation and vibration proof rubber pads to directly support the bottom surface of the fixing leg that is in contact with and under
20. arge port of the set y Open Handle Low fully 4 Turn ON the vacuum pump 1 V Loosen the flare nut of the packed valve Gas side a little to check that the air passes through 2 4 Retighten the flare nut V Execute vacuuming until the compound pressure gauge indicates 101 kPa 76 cmHg 1 4 Close Handle Low completely V Turn OFF the vacuum pump 4 Leave the vacuum pump as it is for 1 or 2 minutes and check that the indicator of the compound pressure gauge does not return 4 Open the valve stem or valve handle fully First at liquid side then gas side 4 Disconnect the charge hose from the charge port i Tighten the valve and caps of the charge port securely Use the vacuum pump vacuum pump adapter and gauge manifold correctly referring to the manuals supplied with each tool before using them Check that the vacuum pump oil is filled up to the specified line of the oil gauge When air is not charged check again whether the connecting port of the discharge hose which has a projection to push the valve core is firmly connected to the charge port EN Digital Inverter B How to Open the Valve Open or close the valve Liquid side Open the valve with a 4 mm hexagon wrench Gas side Valve unit Using a minus screwdriver turn it
21. ations Alocation with a saline atmosphere coastal area or one that is full of sulfide gas hot spring area Special maintenance is required Alocation subject to oil vapor oily smoke or corrosive gases Alocation in which organic solvent is used Alocation where high frequency equipment including inverter equipment private power generator medical equipment and communication equipment is used Installation in such a location may cause malfunction of the air conditioner abnormal control or problems due to noise from such equipment Alocation in which the discharged air of the outdoor unit blows against the window of a neighboring house Alocation where the operating noise of the outdoor unit is transmitted e When the outdoor unit is installed in an elevated position be sure to secure its feet Alocation in which drain water poses any problems Install the outdoor unit in a location where the discharge air is not blocked When an outdoor unit is installed in a location that is always exposed to strong winds like a coast or on the high stories of a building secure normal fan operation by using a duct or wind shield When installing the outdoor unit in a location that is constantly exposed to strong winds such as on the upper stairs or rooftop of a building apply the windproofing measures referred to in the following examples 1 Install the unit so that its discharge port faces the wall of the building
22. compressor with the purpose of preheating the compressor in order to protect it Therefore leave the main power switch at the on setting during the periods when the air conditioner is being used Wiring between Indoor Unit and Outdoor Unit Figure below shows the wiring connections between the standard indoor and outdoor units and between the indoor units and remote controller The wires indicated by the broken lines or dot and dash lines are provided at the installation place Refer to the wiring diagrams of the models concerned for the internal wiring connections of the outdoor unit and indoor units There is no need to perform the P C board settings for the indoor units Input power 380 415 V 3N 50Hz Eum Leakage breaker S000 S000 Indoor unit Indoor unit Indoor unit main secondary secondary 380 V 3N 60Hz Outdoor unit T CI Remote controller B Power and Wiring Specifications Model RAV SM Type 224AT8 280AT8 224AT7 280AT7 Power su 380 415 V 3N 380 V 3N PPly 50 Hz 60 Hz Maximum running current 18 0A 22 0 A 18 0 A 22 0 A ee 25A 25A 25A 25A use rating Corali 5 x 2 5 mm or more HO7 RN F or 60245 IEC 66 rien a 4 x 1 5 mm or more wires 9 HO7 RN F or 60245 IEC 66 Number of wire x wire size Digital Inverter How to wire 1 Connect the connecting wire to the ter
23. e B For Reference If a heating operation is to be continuously performed for a long time under the condition that the outdoor temperature is 0 C or lower draining defrosted water may be difficult due to the bottom plate freezing resulting in trouble with the cabinet or fan It is recommended to procure an anti freeze heater locally in order to safely install the air conditioner For details contact the dealer Digital Inverter 5 REFRIGERANT PIPING B Knockout of Pipe Cover B Optional Installation Parts Locally procured Knockout procedure Parts name Q ty Refrigerant piping Liquid side 212 7 mm A Gas side 419 1 mm Approx 800 mm One ean 28 6 mm B Pipe insulating material 4 polyethylene foam 10 mm thick C Putty PVC tape One each Rear direction REQUIREMENT A Follow the instructions in the installation manual provided h Pipe covet with the branch pipe kit and the instructions in the installation gt Side direction manual of the indoor unit to connect the refrigerant pipe oO rd between the branch pipe and indoor unit Front direction Down direction The indoor outdoor connecting pipes can be connected Bl Refrigerant Piping Connection in 4 directions Take off the knockout part of the pipe cover through which pipes or wires will pass through the base plate AN CAUTION e Detach the pipe cover and tap on the knockout section a PE few times with the s
24. e all fuse types can be used must be used for the power supply line of this conditioner INSTALLATION OF NEW REFRIGERANT AIR CONDITIONER CAUTION New Refrigerant Air Conditioner Installation e THIS AIR CONDITIONER ADOPTS THE NEW HFC REFRIGERANT R410A WHICH DOES NOT DESTROY OZONE LAYER R410A refrigerant is apt to be affected by impurities such as water oxidizing membrane and oils because the working pressure of R410A refrigerant is approx 1 6 times as that of refrigerant R22 Accompanied with the adoption of the new refrigerant the refrigerant oil has also been changed Therefore during installation work be sure that water dust former refrigerant or refrigerant oil does not enter the new type refrigerant R410A air conditioner cycle To prevent mixing of refrigerant or refrigerant oil the sizes of connecting sections of charging port on main unit and installation tools are different from those of the conventional refrigerant units Accordingly special tools are required for the new refrigerant R410A units For connecting pipes use new and clean piping materials with high pressure fittings made for R410A only so that water and or dust does not enter Digital Inverter B Required Tools Equipment and Precautions for Use Prepare the tools and equipment listed in the following table before starting the installation work Newly prepared tools and equipment must be used exclusively Legend A Prepared newly Use for R
25. ed 20 4 way valve reverse error 21 High pressure release operation 22 Outdoor fan motor error 23 Compressor driver short circuit protection 24 Position detection circuit error in one line display 25 Ps sensor error 0 0 0 0 0 0 0 0 0 0 6 ee e CO OJ CO OF CF OF OF O e 0 OF OF OF OF OF CO CO CO OC CO CO e 06 OO O OF OF OF CF O Oje o OF CO OF OF CJ CO CO CO CO CO CO OC CO OC eee e ee ee JE JE JE JE JE JE JE JE JE JE JE JK JE JK JE JE eee eee ee ee O O O OF OF OF OF OF OF OF CF OF OC OF OF OC OF OF CF OF OF CF OF OC O e 0 0 oo ooo O ee O C ooo ee oe O joOleeooeoj oljeoleoeooeooee eooe o e o e o e e o O O e e e e o e oe o e o e e o e o e e o o e ole e O 0 0 0 0 60 e e e e o eeeoeee0eeeoeoeoo 26 Ps drop down error OFF O ON Flashing The LEDs and DIP switches are located on the lower left of the P C ON ON board of the outdoor unit nh I L th 1 2 3 4 1 2 4 4 SW804 SW805 Enlarged view of ON ON LEDs ll PERR ol O o SW802 SW803 SW800 SW801 SW806 EN 23 Digital Inverter 15 APPENDIX Work instructions The existing R22 and R407C piping can be reused for our d
26. glpin Number of bent unit PIP piping portions Gas side Liquid side Gas side Liquid side SM2244 028 6 012 7 015 9 99 5 10 or less SM2804 028 6 012 7 015 9 99 5 10 or less Figure of Simultaneous twin Figure of Simultaneous triple Indoor Unit EN Indoor Unit ndoor Unit Indoor Unit Allowable pipe length m Height difference m Branch piping Indoor outdoor H Total length Erben Sn e 24 22 45 22 Outdoor ditas a 44 44 22 DUST ASI 16 23 Indoor unit t4 9 22 5 5 15 42 44 22 27 3 Indoor Outdoor indoor 41 23 46 46 46 23 e 25 22 26 43 unit unit Ah 421 23 7 27 47 23 45 22 27 3 Upper Upper Maximum 5 e 26 23 47 43 Maximum Maximum Maximum SM2244 70 15 20 6 30 30 0 5 SM2804 70 15 20 6 30 30 0 5 Pipe diameter mm Outdoor Main pire Branch pipin Number of bent unit pip piping portions Gas side Liquid side Gas side Liquid side 42 43 015 9 42 3 29 5 SMS inii did 44 15 6 47 12 7 44 25 46 47 6 4 ee SM2804 028 6 012 7 42 to 27 015 9 42 to 27 29 5 10 or less Figure of Simultaneous double twin Indoor Unit Digital Inverter 6 AIR PURGING B Airtight Test Before starting an airtight test further tighten the spindle valves on the gas side and liquid side Pressurize the pipe with nitrogen
27. hank of a screwdriver A knockout TAKE NOTE OF THESE 4 IMPORTANT POINTS BELOW hole can easily be punched FOR PIPING WORK De As shown in the figure below it is easier to punch out the 1 Keep dust and moisture away from inside the connecting knockout hole when the pipe cover is left in place rather pipes than when the cover is removed from the unit 2 Tightly connect the connection between pipes and the In knocking out the hole the knockout section can easily unit be removed by hand once the bottom of the three 3 Evacuate the air in the connecting pipes using a locations where the section is joined along the guide lines VACUUM PUMP is broken using a screwdriver 4 Check for gas leaks at connection points e After punching out the knockout hole remove burrs from the hole and install the protective bush and guard material around the passage hole provided as Piping connection accessories in order to protect the wires and pipes Also be sure to attach the pipe covers after connecting the Liquid side pipes The pipe covers can be easily attached by cutting Outer diameter Thickness off the slits at the lower part of the covers 912 7 mm 0 8 mm Gas side Outer diameter Thickness 19 1 mm 1 2 mm 28 6 mm 1 0 mm half hard REQUIREMENT Be s re weet heavy Workigloyes While Working On the gas side be sure to use the 019 1 mm pipe provided with the outdoor unit 10 EN Digital Inverter Flaring B Connecting
28. igital inverter R410A product installations WARNING Confirming the existence of scratches or dents on the existing pipes and confirming the reliability of the pipe strength are conventionally referred to the local site Basic conditions needed to reuse existing pipes Check and observe the presence of three conditions in the refrigerant piping works 1 Dry There is no moisture inside of the pipes 2 Clean There is no dust inside of the pipes 3 Tight There are no refrigerant leaks Restrictions for use of existing pipes In the following cases the existing pipes should not be reused as they are Clean the existing pipes or exchange them with new pipes 1 When a scratch or dent is heavy be sure to use new pipes for the refrigerant piping works 2 When the existing pipe thickness is thinner than the specified Pipe diameter and thickness be sure to use new pipes for the refrigerant piping works The operating pressure of R410A is high 1 6 times that of R22 and R407C Ifthere is a scratch or dent on the pipe or a thinner pipe is used the pressure strength may be inadequate which may cause the pipe to break in the worst case Pipe diameter and thickness mm Reference outside Wall thickness diameter mm mm Material 64 0 8 9 5 0 8 12 7 0 8 15 9 1 0 19 1 12 22 2 1 0 Half hard 28 6 1 0 Half hard 3 When the outdoor unit was left with
29. minal as identified with their respective numbers on the terminal block of the indoor and outdoor units HO7 RN F or 60245 IEC 66 1 5 mm or more 2 When connecting the connecting wire to the outdoor unit terminal prevent water from coming into the outdoor unit 3 Secure the power supply wire and indoor outdoor connecting wires using the cord clamp of the outdoor unit 4 For interconnecting wires do not use a wire joined to another on the way Use wires long enough to cover the entire length 5 Wiring connections differ in conformance to EMC standards depending whether the system is twin triple or double twin Connect wires according to respective instructions CAUTION e An installation fuse must be used for the power supply line of this air conditioner Incorrect incomplete wiring may lead to an electrical fire or smoke Prepare an exclusive power supply for the air conditioner This product can be connected to the mains power Fixed wire connections A switch that disconnects all poles and has a contact separation of at least 3 mm must be incorporated in the fixed wiring Simultaneous triple and double twin system Wiring diagram For details on the remote controller wiring installation refer to the Installation Manual enclosed with the remote controller Simultaneous twin system Remote controller Remote controller inter unit wiring Remote controller wiring Indoor side J side
30. mm with a wall thickness of 1 0 mm for 15 9 mm with a wall thickness of 1 2 mm for 019 1 mm and with a wall thickness of 1 0 mm for 028 6 mm half hard Do not use the conventional piping with a wall thickness less than these thicknesses due to insufficient pressure capacity When using general copper pipes Use general copper pipes with a wall thickness of 0 8 mm for 6 4 mm 29 5 mm and 012 7 mm with a wall thickness of 1 0 mm for 215 9 mm with a wall thickness of 1 2 mm for 19 1 mm and with a wall thickness of 1 0 mm for 28 6 mm half hard Do not use any copper pipes with a wall thickness less than these thicknesses Flare nuts and flare machining e The flare nuts and flare machining are different from those for the conventional refrigerant Use the flare nuts supplied with the air conditioner or those for R410A Before performing flare machining carefully read REFRIGERANT PIPING EN 5 Digital Inverter 4 INSTALLATION CONDITIONS B Before installation Be sure to prepare to the following items before installation Length of refrigerant pipe Length of refrigerant pipe connected to indoor outdoor unit Item Addition of refrigerant is fto 30 M unnecessary at the local site lt Addition of refrigerant gt 31 to 70m Add 40 g of refrigerant for every 1 m of piping that exceeds 30 m Ifthe total length of the refrigerant pipe exceeds 30 m add refrigerant in the amount given in
31. nce this pipe will become very hot during heating operations B Replenishing Refrigerant This model is a 30 m chargeless type that does not need to have its refrigerant replenished for refrigerant pipes up to 30 m When a refrigerant pipe longer than 30 m is used add the specified amount of refrigerant Refrigerant replenishing procedure 1 After vacuuming the refrigerant pipe close the valves and then charge the refrigerant while the air conditioner is not working 2 When the refrigerant cannot be charged to the specified amount charge the required amount of refrigerant from the charge port of the valve on the gas side during cooling Requirement for replenishing refrigerant Replenish liquid refrigerant When gaseous refrigerant is replenished the refrigerant composition varies which disables normal operation Digital Inverter Adding additional refrigerant Figure of Simultaneous twin Figure of Simultaneous triple Indoor Unit Indoor Unit Indoor Unit Indoor Unit Indoor Unit Figure of Simultaneous double twin Indoor Unit Indoor Unit Indoor Unit Outdoor Unit Formula for calculating the amount of additional refrigerant Formula will differ depending on the diameter of the liquid connecting side pipe 41 to 27 are the lengths of the pipes shown in the figures above unit m Simultaneous twin
32. nd wires for telephone wires Turn off the main power supply switch or breaker before attempting any electrical work and maintenance Make sure all power switches are off Failure to do so may cause electric shock Use an exclusive power circuit for the air conditioner Use the rated voltage Connect the connecting wire correctly If the connecting wire is incorrect electric parts may be damaged When moving the air conditioner for installation to another place be very careful not to allow the specified refrigerant R410A to become mixed with any other gaseous body into the refrigeration cycle If air or any other gas mixes with the refrigerant the gas pressure in the refrigeration cycle will become abnormally high and it may result in the pipe bursting or personal injuries Do not modify this unit by removing any of the safety guards or by by passing any of the safety interlock switches Do not touch the intake or aluminum fins of the outdoor unit Doing so may result in injury Tighten the flare nut with a torque wrench in the specified manner Excessive tightening of the flare nut may cause a crack in the flare nut after a long period which may result in refrigerant leakage Install the air conditioner securely in a location where the base can sustain the weight of the unit adequately Perform the specified installation work to guard against an earthquake If the air conditioner is not installed appropriately accidents may occur due to
33. neath the bottom plate of the outdoor unit When installing the foundation for an outdoor unit with downward piping consider the piping work GOOD Absorb vibration with vibration proof Fixing leg rubber pads Foundation GOOD Bottom plate of outdoor unit Foundation Support the bottom surface of the fixing leg that is in contact with and underneath the bottom plate of the outdoor unit EN 9 NO GOOD Do not support the outdoor unit only with the fixing leg If only the end of the fixing leg is supported it may deform E Foundation Set the out margin of the anchor bolt to 15 mm or less 15 or less When water is to be drained through the drain hose attach the following drain nipple and waterproof rubber cap and use the drain hose Inner diam 16 mm sold on the market Also seal the knockout hole and screws securely with silicone material etc to prevent water from leaking Some conditions may cause dewing or dripping of water When collectively draining discharged water completely use a drain pan asl GC LAT Waterproof rubber cap 5 pcs Drain nipple Please pay attention to the drain in region with snowfall and cold temperature as it may be frozen and cause drainage problems Punch the knockout holes on the base plate to improve drainability Use a screwdriver and take off the knockout part outward Knockout hole Waterproof rubber cap Drain nippl
34. new pipes NO NO Is it possible to operate the existing air conditioner YES After the existing air conditioner is operated in cooling mode for approx 30 minutes or longer recover the refrigerant For cleaning the pipes and recovering oil Nitrogen gas pressure 0 5 MPa Refrigerant recovery Refrigerant recovery equipment Remove the existing air conditioner from the piping and carry out flushing nitrogen pressure 0 5 MPa to remove any remains inside of the pipe Note In case of twin pipes also be sure to flush the branching pipe If there is discharge of remains it is judged that a large quantity of remains are present Was largely discolored oil or a large quantity of remains discharged When the oil deteriorates the color of the oil changes to a muddy or black color YES Clean the pipes or use new pipes Connect the indoor outdoor units to the existing pipe Use a flare nut attached to the main unit for the indoor outdoor units Do not use the flare nut of the existing pipe Re machine the flare machining size to size for R410A Piping necessary to change the flare nut When using a 219 1 mm pipe for the gas pipe of the first machining size due to pipe compression branching pipe 1 Flare nut width H Turn the existing pipe switch on the cycle control P C n Copper pipe board of the outdoor unit to ON side At shipment from outer factory OFF O
35. ng can cause an electric shock Do not connect ground wires to gas pipes water pipes lightning rods or ground wires for telephone wires Test Run Turn on the leakage breaker at least 12 hours before starting a test run to protect the compressor during startup CAUTION Incorrect installation work may result in a malfunction or complaints from customers EN Digital Inverter EN B Installation Location CAUTION Z N WARNING f Install the outdoor unit properly in a location that is 2 durable enough to support the weight of the outdoor unit Insufficient durability may cause the outdoor unit to fall which may result in injury 3 This outdoor unit has a weight of about 135 kg Pay special attention when installing the unit onto a wall surface AN CAUTION Do not install the outdoor unit in a location that is subject to combustible gas leaks Accumulation of combustible gas around the outdoor unit may cause a fire Install the outdoor unit in a location that meets the following conditions after the customer s consent is obtained e Awell ventilated location free from obstacles near the air inlets and air outlet Alocation that is not exposed to rain or direct sunlight Alocation that does not increase the operating noise or vibration of the outdoor unit Alocation that does not produce any drainage problems from discharged water Do not install the outdoor unit in the following loc
36. nipple 1 5 Waterproof rubber cap 1 mes Protective bush 1 For protecting wires pipe cover Guard material for passage part 1 For protecting passage part pipe cover For conforming to EMC standards Clamp filter 1 Used for power wire 19 1 mm pipe 1 For the pipe inside the outdoor unit Joint 19 1 225 4 mm 1 For connecting the pipe Qi Joint 925 4 928 6 mm 1 For connecting the pipe Elbow 1 For connecting the pipe INFORMATION e The main pipe on the gas side of this outdoor unit has a diameter of 928 6 mm but a 019 1 mm flare connection is used where the valve is connected Be sure to use the 19 1 mm pipe and joint provided as accessories for the pipe connection Before installing the unit check that the unit has the correct model name to prevent the wrong unit from being installed in the wrong place Before proceeding to weld the refrigerant pipe be sure to pass nitrogen through the pipe Before installing the indoor units read the instructions in the installation manual provided with the indoor units Before installing a branch pipe read the instructions in the installation manual provided with the branch pipe kit e Inthe case of a simultaneous double twin system use indoor unit with the same capacity for all four indoor units Branch pipe kit Combination indoor unit RAV SM2244 RBC DTWP101E SM56 x 4 units RAV SM2804 RBC DTWP101E SM80 x
37. omplete connection or fixation may cause a fire etc Be sure to connect the earth wire grounding work Incomplete grounding may lead to electric shock Do not connect ground wires to gas pipes water pipes lightning rods or ground wires for telephone wires The appliance shall be installed in accordance with national wiring regulations Capacity shortages of the power circuit or an incomplete installation may cause an electric shock or fire CAUTION Wrong wiring may cause a burn out of some electrical parts Be sure to use the cord clamps attached to the product Do not damage or scratch the conductive core or inner insulator of the power and inter connecting wires when peeling them Use the power and Inter connecting wires with specified thicknesses specified types and protective devices required Remove the panel and you can see electric parts on the front side A metal pipe can be installed through the hole for wiring If the hole size does not fit the wiring pipe to be used drill the hole again to an appropriate size Furthermore be sure to secure these wires with the pipe valve fixing plate and cord clamps stored in the electric parts box Side D Space 8 5 mm I I Side C Space 4 mm t Secure the indoor outdoor connecting wires at side C Le Pipe hole e SOI Pipe valve fixing plate 17 When the outdoor air temperature drops power is supplied to the
38. own in the figure be sure to use two wrenches to loosen or tighten the flare nut of the valve on the gas side If you use a single crescent the flare nut cannot be tightened to the required tightening torque On the other hand use a single crescent to loosen or tighten the flare nut of the valve on the liquid side Unit Nem Outer dia of copper pipe Tightening torque 33 to 42 3 3 to 4 2 kgfem 50 to 62 5 0 to 6 2 kgfem 68 to 82 6 8 to 8 2 kgfem 100 to 120 10 0 to 12 kgf m 9 5 mm diam 12 7 mm diam 15 9 mm diam 19 1 mm diam Cover Piping valve Tightened Flare nut Valve at gas side A CAUTION 1 Do not put the crescent wrench on the cap or cover The valve may break 2 If applying excessive torque the nut may break according to some installation conditions Cover NO GOOD 12 After the installation work be sure to check for gas leaks of the pipe connections with nitrogen Pressure of R410A is higher than that of R22 Approx 1 6 times Therefore using a torque wrench tighten the flare pipe connecting sections that connect the indoor outdoor units at the specified tightening torque Incomplete connections may cause not only a gas leak but also trouble with the refrigeration cycle Do not apply refrigerant oil to the flared surface B Branch Pipe Carry out the refrigerant piping work using the branch pipe kit which is
39. purchased separately Branch pipe installation The ends of the branch pipes The ends of the branch form a line perpendicular to pipes form a line the ground perpendicular to the ground Both the collecting i pipe anid branoh Both the collecting pipes form a line pipe and branch llel to th d parallel to the groun pipes form a line R O parallel to the ground Branch pipe Branch pipe Collecting pipe Collection area Gas side Liquid side Inclined NO GOOD Make sure that the pipes are installed level after branching Length of straight sections on main pipe side of branch pipe Provide a straight section with a length of at least 500 mm on the main pipe side of the branch pipe Same for both liquid side and gas side 500 mm or more 500 mm or more EN Digital Inverter B Refrigerant Pipe Length Simultaneous twin triple Indoor Unit Indoo r Unit A Simultaneous double twin 3 1 Indoor Unit Indoor Unit Allowable pipe length m Height difference m Total length Branch piping Branch piping Indoor outdoor H OUSE alee Da En EE Indoor indoor unit 41 23 43 44 22 Indoor unit Outdoor unit Ah 41 24 24 44 23 Upper Upper Maximum Maximum Maximum SM2244 70 20 10 30 30 0 5 SM2804 70 20 10 30 30 0 5 Pipe diameter mm Outdoor Main pipe Branch
40. rm to the regulations of the local electric company when wiring the power supply Inappropriate grounding may cause electric shock Do not install the air conditioner in a location that may be subjected to a risk of exposure to a combustible gas If a combustible gas leaks and becomes concentrated around the unit a fire may occur Digital Inverter Install the refrigerant pipe securely during the installation work before operating the air conditioner If the compressor is operated with the valve open and without the refrigerant pipe the compressor sucks air and the refrigeration cycle is overpressurized which may cause a burst or injury e When carrying out the pump down work shut down the compressor before disconnecting the refrigerant pipe Disconnecting the refrigerant pipe with the service valve left open and with the compressor still operating will cause air etc to be sucked in raising the pressure inside the refrigeration cycle to an abnormally high level and possibly resulting in rupturing injury etc CAUTION Do not climb onto or place objects on top of the outdoor unit You may fall or the objects may fall off of the outdoor unit and result in injury e Wear heavy gloves during the installation work to avoid injury To Disconnect the Appliance from the Main Power Supply e This appliance must be connected to the main power supply by means of a switch with a contact separation of at least 3 mm e A 25 A installation fus
41. sory 19 1 Flaring diameter size A Unit mm 519 1 mm pipe A accessory 228 6 mm pipe i i procured locally 1 019 1 mm pipe i iy accessory g Brazing Outer diam of copper pipe AT 9 5 13 2 919 1 mm pipe Brazing _________ o_ o_ _ _yilr_____rg accessory 12 7 16 6 afi 15 9 19 7 19 1 24 0 Elbow accessory 019 1 mm pipe accessory n case of flaring for RA10A with the conventional flare tool pull the tool out approx 0 5 mm more than that for R22 to adjust it to the specified flare size The copper pipe gauge is useful for adjusting the projection margin size REQUIREMENT Before proceeding to weld the refrigerant pipe be sure to pass nitrogen through the pipe to prevent oxidation inside it If nitrogen is not passed through the pipe the refrigerating cycle may become clogged by oxidized scales The 228 6 mm pipe cannot be passed through the pipe cover and knockout hole in the base plate so be sure to connect the 219 1 mm pipe and 228 6 mm pipe outside the outdoor unit EN 11 Digital Inverter B Tightening of Connecting Part 1 Align the centers of the connecting pipes and fully tighten the flare nut with your fingers Then fix the nut with a wrench as shown in the figure and tighten it with a torque wrench Half union or packed valve Flare nut TA Externally Internally threaded threaded side side Fix with wrench Tighten with torque wrench 2 As sh
42. the Adding additional refrigerant Do not connect a refrigerant pipe that is shorter than 7 5 m This may cause a malfunction of the compressor or other devices Airtight test 1 Before starting an airtight test further tighten the spindle valves on the gas and liquid sides 2 Pressurize the pipe with nitrogen gas charged from the service port to the design pressure 4 15 MPa to conduct an airtight test 3 After the airtight test is completed evacuate the nitrogen gas Air purge To purge air use a vacuum pump e Do not use refrigerant charged in the outdoor unit to purge air The air purge refrigerant is not contained in the outdoor unit Electrical wiring Be sure to fix the power wires and indoor outdoor connecting wires with clamps so that they do not come into contact with the cabinet etc Earthing WARNING Make sure that proper earthing is provided Improper earthing may cause an electric shock For details on how to check earthing contact the dealer who installed the air conditioner or a professional installation company Proper earthing can prevent charging of electricity on the outdoor unit surface due to the presence of a high frequency in the frequency converter inverter of the outdoor unit as well as prevent electric shock If the outdoor unit is not properly earthed you may be exposed to an electric shock Be sure to connect the earth wire grounding work Incomplete groundi
43. the pipes disconnected or the gas leaked from the pipes and the pipes were not repaired and refilled There is the possibility of rain water or air including moisture entering the pipe 4 When refrigerant cannot be recovered There is the possibility that a large quantity of dirty oil or moisture remains inside the pipes 5 When a commercially available dryer is attached to the existing pipes There is the possibility that copper green rust has been generated 24 6 When the existing air conditioner is removed after refrigerant has been recovered Check if the oil is judged to be clearly different from normal oil The refrigerator oil is copper rust green in color There is the possibility that moisture has mixed with the oil and rust has been generated inside the pipe There is discolored oil a large quantity of residue or a bad smell Alarge quantity of shiny metal dust or other wear residue can be seen in the refrigerant oil 7 When the air conditioner has a history of the compressor failing and being replaced When discolored oil a large quantity of residue shiny metal dust or other wear residue or mixture of foreign matter is observed trouble will occur 8 When temporary installation and removal of the air conditioner are repeated such as when leased etc 9 Ifthe type of refrigerator oil of the existing air conditioner is other than the following oil Mineral oil Suniso Freol S MS Synthe
44. the unit falling If refrigerant gas has leaked during the installation work ventilate the room immediately If the leaked refrigerant gas comes in contact with fire noxious gas may be generated After the installation work confirm that refrigerant gas does not leak If refrigerant gas leaks into the room and flows near a fire source such as a cooking range noxious gas may be generated Electrical work must be performed by a qualified electrician in accordance with the Installation Manual Make sure the air conditioner uses an exclusive power supply An insufficient power supply capacity or inappropriate installation may cause fire Use only the specified wiring during the unit installation Ensure that all terminals are securely fixed so preventing any external forces having a negative effect on the terminals When the air conditioner cannot cool or heat a room well contact the dealer from whom you purchased the air conditioner as refrigerant leakage is considered as the cause In the case of repair that requires refill of refrigerant ask service personnel about details of the repair The refrigerant used in the air conditioner is harmless Generally the refrigerant does not leak However if the refrigerant leaks in a room and a heater or stove burner in the room catches fire it may generate toxic gas When you ask service personnel for repairing refrigerant leakage confirm that the leakage portion has been completely repaired Confo
45. tic oil alkyl benzene HAB Barrel freeze ester series PVE only of ether series The winding insulation of the compressor may deteriorate NOTE The above descriptions are results have been confirmed by our company and represent our views on our air conditioners but do not guarantee the use of the existing pipes of air conditioners that have adopted R410A in other companies Branching pipe for simultaneous operation system In the concurrent twin system when TOSHIBA has specified that branching pipe is to be used it can be reused Branching pipe model name RBC TWP30E2 RBC TWP50E2 RBC TRP100E On the existing air conditioner for simultaneous operation system twin triple double twin system there are cases of branch pipes being used that have insufficient compressive strength In such case please change the piping to a branch pipe for R410A Curing of pipes When removing and opening the indoor or outdoor unit for a long time cure the pipes as follows Otherwise rust may be generated when moisture or foreign matter due to condensation enters the pipes e The rust cannot be removed by cleaning and new pipes are necessary Placement location Term Curing manner 1 month or more Pinching Outdoors Less than 1 month Pinching or taping Indoors Every time EN Digital Inverter Are there scratches or dents on the existing pipes YES Existing pipes Cannot be used e Use

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