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LG Multi V ARUN***LM3 Series Installation Manual
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LG Multi V ARUN***LM3 Series Installation Manual

LG Multi V ARUN***LM3 Series Installation Manual

Solo- heat pump
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INSTALLATION MANUAL
AIR CONDITIONER
• Please read this installation manual completely before installing the product.
• Installation work must be performed in accordance with the national
wiring standards by authorized personnel only.
• Please retain this installation manual for future reference after reading
it thoroughly.your set and retain it for future reference.
MODELS : ARUN***LM3 Series
P/NO : MFL46912331
Solo -
Heat Pump
www.lg.com

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Summary of Contents for LG Multi V ARUN***LM3 Series

  • Page 1 • Installation work must be performed in accordance with the national wiring standards by authorized personnel only. • Please retain this installation manual for future reference after reading it thoroughly.your set and retain it for future reference. Solo - Heat Pump MODELS : ARUN***LM3 Series www.lg.com P/NO : MFL46912331...

  • Page 2: Table Of Contents

    Solo ARUN***LM3 Series Outdoor unit Installation Manual - Heat Pump TABLE OF CONTENTS Safety Precautions ........................3 Installation Process ......................7 Outdoor units Information....................8 Environment-friendly Alternative Refrigerant R410A ............9 Select the Best Location ......................9 Installation Space........................10 Lifting method ........................12 Installation ...........................13 Refrigerant piping installation ...................18 Pipe connections between indoor and outdoor unit ............21 Electrical Wiring ........................36 Test Run ..........................52...

  • Page 3: Safety Precautions

    Safety Precautions Safety Precautions To prevent injury to the user or other people and property damage, the following instructions must be followed. n Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness is classified by the following indications. This symbol indicates the possibility of death or serious injury.
  • Page 4 Safety Precautions When installing and moving the air Do not reconstruct to change the settings of conditioner to another site, do not charge it the protection devices. with a different refrigerant from the refrigerant specified on the unit. • If a different refrigerant or air is mixed with the •...
  • Page 5 Safety Precautions n Installation Always check for gas (refrigerant) leakage Do not install the product where the noise or hot air after installation or repair of product. from the outdoor unit could damage the neighborhoods. • Low refrigerant levels may cause failure of product. •...
  • Page 6 Safety Precautions Be very careful about product transportation. • Only one person should not carry the product if it weighs more than 20 kg. • Some products use PP bands for packaging. Do not use any PP bands for a means of transportation.

  • Page 7: Installation Process

    Installation Process Installation Process Indicate clearly who will be responsible for switch setting. Determination of division work Preparation of contract drawings Make connection clearly between outdoor, indoor, remote controller and option. Take account of gradient The foundation must be level even Sleeve and insert work Outdoor unit foundation work of drain piping...

  • Page 8: Outdoor Units Information

    Outdoor units Information Outdoor units Information Power Supply: Outdoor Unit (3Ø, 380 - 415V, 50Hz / 3Ø, 380V, 60Hz) Unit 1 Outdoor unit System(HP) Model ARUN80LM3 ARUN100LM3 ARUN120LM3 ARUN80LM3 ARUN100LM3 ARUN120LM3 Product Charge Max. Connectable No. of Indoor Units Net Weight 175 x 1 218 x 1 218 x 1...

  • Page 9: Environment-Friendly Alternative Refrigerant R410A

    Environment-friendly Alternative Refrigerant R410A Environment-friendly Alternative Refrigerant R410A • The refrigerant R410A has the property of higher operating pressure in comparison with R22. Therefore, all materials have the characteristics of higher resisting pressure than R22 ones and this characteristic should be also considered during the installation. R410A is an azeotrope of R32 and R125 mixed at 50:50, so the ozone depletion potential (ODP) of R410A is 0.

  • Page 10: Installation Space

    Installation Space Installation Space Individual Installation n During the installation of the unit, consider service, inlet, and outlet and acquire the minimum space as shown in the figures below. Case 1 Case 2 Category Installation Space (10mm≤Si d e Space≤49mm) (Si d e Space≥49mm) A≥10 A≥50...
  • Page 11 Installation Space Seasonal wind and cautions in winter • Sufficient measures are required in a snow area or severe cold area in winter so that product can be operated well. • Get ready for seasonal wind or snow in winter even in other areas. •...

  • Page 12: Lifting Method

    Lifting Method Lifting method • When carrying the suspended, unit pass the ropes under the unit and use the two suspension points each at the front and rear. • Always lift the unit with ropes attached at four points so that impact is not applied to the unit. •...

  • Page 13: Installation

    Lifting Method Installation • Install at places where it can endure the weight and vibration/noise of the outdoor unit. • The outdoor unit supports at the bottom shall have width of at least 100mm under the unit°Øs legs before being fixed. •...
  • Page 14 Installation Foundation for Installation • Fix the unit tightly with bolts as shown below so that unit will not fall down due to earthquake or gust. • Use the H-beam support as a base support • Noise and vibration may occur from the floor or wall since vibration is transferred through the installation part depending on installation status.
  • Page 15 Installation Preparation of Piping Main cause of gas leakage is defect in flaring work. Carry out correct flaring work in the following procedure. 1) Cut the pipes and the cable. • Use the accessory piping kit or the pipes purchased Copper Slanted Uneven Rough tube...
  • Page 16 Installation FLARE SHAPE and FLARE NUT TIGHTENING TORQUE Precautions when connecting pipes • See the following table for flare part machining dimensions. • When connecting the flare nuts, apply refrigerant oil to the inside and outside of the flares and turn them three or four times at first.
  • Page 17 Installation HEAT INSULATION 1. Use the heat insulation material for the refrigerant piping which has an excellent heat-resistance (over 120°C). Fastening band (accessory) 2. Precautions in high humidity circumstance: This air conditioner has been tested according to the "ISO Conditions with Mist" and confirmed that there is not any default.

  • Page 18: Refrigerant Piping Installation

    Refrigerant piping installation Refrigerant piping installation Precautions on Pipe connection / Valve operation Pipe connection is done by connecting from the end of the pipe to the branching pipes, and the refrigerant pipe coming out of the outdoor unit is divided at the end to connect to each indoor unit.
  • Page 19 Refrigerant piping installation Caution 1. Use the following materials for refrigerant piping. • Material: Seamless phosphorous deoxidized copper pipe • Wall thickness : Comply with the relevant local and national regulations for the designed pressure 3.8MPa. We recommend the following table as the minimum wall thickness. Outer diameter 6.35 9.52...
  • Page 20 Refrigerant piping installation 12. Always insulate the piping properly. Insufficient insulation will result in a decline in heating/cooling performance, drip of condensate and other such problems. 13. When connecting the refrigerant piping, make sure the service valves of the Outdoor Unit is completely closed (the factory setting) and do not operate it until the refrigerant piping for the Outdoor and Indoor Units has been connected, a refrigerant leakage test has been performed and the evacuation process has been completed.

  • Page 21: Pipe Connections Between Indoor And Outdoor Unit

    Pipe connections between indoor and outdoor unit Pipe connections between indoor and outdoor unit • Pipe connections can be done on the front side or on the side according to the installation environments. • Be sure to let 0.2kgf/cm Nitrogen flow in the pipe when welding. •...
  • Page 22 Pipe connections between indoor and outdoor unit Method of drawing out pipes n Method of drawing out pipes on the front side • Proceed with the pipe work as shown in the below figure for front side pipe drawing out. Liquid pipe Gas pipe Pipe Knock Out for Liquid/...
  • Page 23 Pipe connections between indoor and outdoor unit Refrigerant piping system u Y branch method L100m l 40m Ⓐ : Outdoor Unit Ⓑ : 1st branch (Y branch) Ⓒ : Indoor Units Ⓓ : Downward Indoor Unit u Header Method L 100m Ⓐ...
  • Page 24 Pipe connections between indoor and outdoor unit Ú Refrigerant pipe length Y branch Header Y branch/ Header A+B+b ≤ 100 m Longest pipe length A+B+C+D+e ≤ 100 m A+f ≤ 100 m A+B+e ≤ 100 m ℓ Longest pipe length after 1st branch 40 m 40 m 40 m...
  • Page 25 Pipe connections between indoor and outdoor unit u The amount of Refrigerant The calculation of the additional charge should take into account the length of pipe and CF(correction Factor) value of indoor unit. Amount refrigerant of Indoor units Total liquid pipe Additional charge(kg) Example) 4Way Ceiling Cassette 14.5kW -1ea :Ø12.7 mm...
  • Page 26 Pipe connections between indoor and outdoor unit WARNING ▶ Regulation for refrigerant leakage : the amount of refrigerant leakage should satisfy the following equation for human safety. Total amount of refrigerant in the system ≤ 0.44 ( kg / m Volume of the room at which Indoor Unit of the least capacity is installed p If the above equation can not be satisfied, then follow the following steps.
  • Page 27 Pipe connections between indoor and outdoor unit Distribution Method 1. Line Distribution 3rd main pipe distribution Main pipe Distribution Main pipe Distribution 2. Vertical Distribution Ensure that the branch pipes are attached vertically. 3. The others Header Installation Manual 27...
  • Page 28 Pipe connections between indoor and outdoor unit Branch pipe Fitting Y branch To Outdoor Unit To Branch Piping or Indoor Unit • Ensure that the branch pipes are attached horizontally or vertically (see the diagram below.) Horizontal Facing Facing plane downwards upwards Within +/- 10...
  • Page 29 Pipe connections between indoor and outdoor unit • When the number of indoor units to be connected to the branch pipes is less than the number of branch pipes available for connection then cap pipes should be fitted to the surplus branches. Pinched pipe •...
  • Page 30 Pipe connections between indoor and outdoor unit u Y branch pipe [unit:mm] Models Gas pipe Liquid pipe I.D12.7 I.D12.7 I.D6.35 I.D.6.35 I.D9.52 I.D15.88 I.D15.88 I.D9.52 I.D.6.35 I.D15.88 ARBLN01621 I.D12.7 I.D.9.52 O.D9.52 I.D19.05 O.D15.88 I.D12.7 I.D22.2 I.D19.05 I.D15.88 I.D19.05 I.D12.7 I.D12.7 I.D9.52 I.D19.05 I.D25.4...
  • Page 31 Pipe connections between indoor and outdoor unit u Header [unit:mm] Models Gas pipe Liquid pipe ID12.7 ID6.35 ID6.35 ID12.7 4 branch ID9.52 ID15.88 ID9.52 ARBL054 ID15.88 ID12.7 ID9.52 ID15.88 ID19.05 ID12.7 ID6.35 7 branch ID12.7 ID9.52 ID15.88 120 150 ID15.88 ARBL057 ID9.52 ID15.88...
  • Page 32 Pipe connections between indoor and outdoor unit Leak Test and Vacuum drying (1) Leak test Leak test should be made by pressurizing nitrogen gas to 3.8 MPa(38.7kgf/cm ). If the pressure does not drop for 24 hours, the system passes the test. If the pressure drops, check where the nitrogen leaks. For the test method, refer to the following figure.
  • Page 33 Pipe connections between indoor and outdoor unit (2) Vacuum Vacuum drying should be made from the service port provided on the outdoor unitʼs service valve to the vacuum pump commonly used for liquid pipe, gas pipe and high/low pressure common pipe. (Make Vacuum from liquid pipe, gas pipe and high/low pressure common pipe with the service valve closed.) * Never perform air purging using refrigerant.
  • Page 34 Pipe connections between indoor and outdoor unit Vacuum Mode This function is used for creating vacuum in the system after compressor replacement, ODU parts replacement or IDU addition/replacement. Vacuum mode setting method Vacuum mode cancellation method ODU power reset Outdoor unit PCB DIP switch OFF - DIP switch No.
  • Page 35 Pipe connections between indoor and outdoor unit Thermal insulation of refrigerant piping Be sure to give insulation work to refrigerant piping by covering liquid pipe and gas pipe separately with enough thickness heat-resistant polyethylene, so that no gap is observed in the joint between indoor unit and insulating material, and insulating materials themselves.

  • Page 36: Electrical Wiring

    Electrical Wiring Electrical Wiring Caution 1. Follow ordinance of your governmental organization for technical standard related to electrical equipment, wiring regulations and guidance of each electric power company. WARNING Be sure to have authorized electrical engineers do the electric work using special circuits in accordance with regulations and this installation manual.
  • Page 37 Electrical Wiring CAUTION • Use the 2-core shield cables for transmission lines. Never use them together with power cables. • The conductive shielding layer of cable should be grounded to the metal part of both units. • Never use multi-core cable •...
  • Page 38 Electrical Wiring Control box and connecting position of wiring - Remove all of the screws at front panel and remove the panel by pulling it forward. - Connect transmission line between main and sub outdoor unit through the terminal block. - Connect transmission lines between outdoor unit and indoor units through the terminal block.
  • Page 39 Electrical Wiring Transmission and Power Lines 1) Transmission cable • Types : shielding wire • Cross section : 1.0~1.5mm • Maximum allowable temperature: 60°C • Maximum allowable line length: under 1000m 2) Remote control cable • Types : 3-core cable 3) Central control cable Product type Wire type...
  • Page 40 Electrical Wiring Wiring of main power supply and equipment capacity 1. Use a separate power supply for the Outdoor Unit and Indoor Unit. 2. Bear in mind ambient conditions (ambient temperature,direct sunlight, rain water,etc.) when proceeding with the wiring and connections. 3.
  • Page 41 Electrical Wiring Field Wiring 1. 50Hz 1. 50Hz u Example Connection of Communication Cable u Example Connection of Communication Cable n 1 Outdoor Unit-3Ø, 380-415V n 1 Outdoor Unit-3Ø, 380-415V 3 Phase 4 Wires Power supply 50Hz 380-415V [Outdoor Unit] (Main Switch) R S T N Switch...
  • Page 42 Electrical Wiring 2. 60Hz u Example Connection of Communication Cable n 1 Outdoor Unit - 3Ø, 380V 3 Phase 4 Wires Power supply 60Hz 380V [Outdoor Unit] (Main Switch) R S T N Switch Fuse Power supply 1 Phase 60Hz 220V Power Line (4 Wires Cable)
  • Page 43 Electrical Wiring u Example Connection of Com 3munication Cable [BUS type] [STAR type] • Connection of communication cable must be • Abnormal operation can be caused by installed like below figure between indoor unit to communication defect, when connection of outdoor unit.
  • Page 44 Electrical Wiring u UX2 Chassis Wire Connection Left Side Right Side Main Power Terminal Block Main Power Main Power Main Power Main Power Main Power Main Power Terminal Block Terminal Block Terminal Block Terminal Block Terminal Block Terminal Block Power/ Power/ Ground lines Ground lines...
  • Page 45 Electrical Wiring Location of setting dip switch n Heat Pump SW01B SW02B 7 - Segment SW02V (Auto Addressing) Installation Manual 45...
  • Page 46 Electrical Wiring DIP switch setting n Checking according to dip switch setting 1. You can check the setting values of the Master outdoor unit from the 7 segment LED. The dip switch setting should be changed when the power is OFF. 2.
  • Page 47 Electrical Wiring n Setting the DIP switch • Heat pump • If you set the Dip switch when power is on, the changed setting will not be applied immediately. The changed setting will be enabled only when Power is reset or by pressing Reset button. Index 10 11 12 13 14 ●...
  • Page 48 Electrical Wiring Automatic Addressing • The address of indoor units would be set by auto addressing 1) Wait for 3 minutes after supplying power. n Main PCB (Outdoor Unit,Indoor unit) SW01B SW02B 2) Press RED button of the outdoor units for 5 seconds.
  • Page 49 Electrical Wiring u The Procedure of Automatic Addressing Power On Waiting 3 minutes Press RED Button for 5 sec. (SW02V) Auto addressing start 7-segment LED = 88 Don’t press RED Button (SW02V) • Auto addressing setting end Numbers of indoor unit connection set whose Waiting about 2~7 minutes addressing is completed are indicated for 30seconds on 7-segment LED after completing setting...
  • Page 50 Electrical Wiring Group Number setting Group Number setting for Indoor Units ① Confirm the power of whole system(Indoor Unit, Outdoor Unit) is OFF, otherwise turn off. ② The transmission lines connected to INTERNET terminal should be connected to central control of Outdoor Unti with care for their polarity( A ’...
  • Page 51 ❈ Communication line length can be maximum 300m, use communication line as thick as 1.25mm2. Without Cool/Heat Selector Installation and Connection In case, try to set mode without Cool/Heat Selector and try to use other switch except from LG Outdoor Cool/Heat Selector in field.

  • Page 52: Test Run

    LED in outdoor units. Functions of each Test run steps (Use above LG MV 6.1 version if you want to issue integrated test run report) Step 0. Verify the command signals Select function to be executed during the test run Step 1 Refrigerant Automatic Recharge If additional bottling of the refrigerant is needed, operate to perform this automatically.
  • Page 53 Test Run How to Cope with Test Run Abnormality The phenomena from main component failure Component Phenomenon Cause Check method and Trouble shooting Not operating Motor insulation broken Check resistance between terminals and chassis Strainer clogged Change strainer Compressor Oil leakage Check oil amount after opening oil port Stop during running Motor insulation failure...
  • Page 54 Test Run Method for FDD DIP Switch Setting Following flow chart shows how to work FDD function and method for FDD DIP switch setting Start DIP switch set Setting 1 Setting 2 Setting 3 Setting 4 Press black button ❈ Press the black button until setting number to show up Setting 1 Setting 2...
  • Page 55 Test Run Refrigerant Auto Charging (Setting 1) This function charges appropriate amount of refrigerant automatically through cycle operation. It can be used when refrigerant amount Isn't certain because of SVC and leakage. Start Wait for 3 min. after power reset Set the Dip S/W.
  • Page 56 Test Run Liquid Pipe manifold Gas Pipe Capillary Assembly Procedure 1. Arrange manifold,capillary assembly, refrigerant vessel and scale 2. Connect manifold to the gas pipe service valve of ODU as shown in the figure. 3. Connect manifold and Capillary tube. Use designated capillary assembly only.
  • Page 57 Test Run Refrigerant Checking Function (Setting 2) This function judges refrigerant leakage and overcharging It can be used with refrigerant auto charging function. Inspection Start Press black button for 2 seconds Display Error Proper Temperature Thermo off indoor unit Decide Refrigerant Quantity Display Error Based on Refrigerant Quantity Press black button for 2 seconds...
  • Page 58 Test Run CAUTION 1. Guaranteed Temperature range(Error occurs out of guaranteed temperature range) IDU : 20 ~ 35 °C ODU : 0 ~ 43 °C 2. Set IDU wired remote controller temperature sensor setting as 'IDU'. 3. Make certain that IDU doesn't run with thermo off mode during operation. [ Error contents about auto refrigerant charging function ] : Temperature Range Error (In case that IDU or ODU is out of range) : System Unstable Error (In case, After 45 min operating the system, it does not be stable)
  • Page 59 Test Run Integrated Test Running Function_Cooling Mode (Setting 3) This function is checking process for normal operation of parts and system On operating system. • All processes carry out included refrigerant amount judge logic and check normal condition of parts on cooling mode.
  • Page 60 Test Run Integrated Test Running Function_Heating Mode (Setting 4) This function is checking process for normal operation of parts and system On operating system. • All processes carry out included refrigerant amount judge logic and check normal condition of parts on heating mode.
  • Page 61 Test Run CAUTION 1. Guaranteed Temperature range(Error occurs out of guaranteed temperature range) IDU : 20 ~ 35 °C ODU : 0 ~ 43 °C 2. Set IDU wired remote controller temperature sensor setting as 'IDU'. 3. Make certain that IDU doesn't run with thermo off mode during operation. [ Error contents about auto refrigerant charging function ] : Temperature Range Error (In case that IDU or ODU is out of range) : System Unstable Error (In case, After 45 min operating the system, it does not be stable)
  • Page 62 Test Run Night Low Noise Function In cooling mode, this function makes the ODU fan operate at low RPM to reduce the fan noise of ODU at night which has low cooling load. Max. RPM setting method RPM / Time Settings Capacity Set the DIP S/W Heat Pump...
  • Page 63 Test Run Vacuum Mode This function is used for creating vacuum in the system after compressor replacement, ODU parts replacement or IDU addition/replacement. Vacuum mode setting method Vacuum mode cancellation method ODU power reset Set the DIP S/W OFF Power reset Set the DIP S/W ON Vacuum mode cancellation Press the black button Main PCB (5 sec.)
  • Page 64 Test Run Static pressure compensation mode This function secures the air flow rate of ODU, in case static pressure has been applied like using duct at discharge of ODU. n Static pressure compensation dip S/W setting method High static pressure mode : Set DIP S/W Static pressure compensation mode cancellation Static pressure compensation mode setting method...
  • Page 65 Test Run Self-Diagnosis Function Error Indicator • This function indicates types of failure in self-diagnosis and occurrence of failure for air condition. • Error mark is displayed on display window of indoor units and wired remote controller, and 7-segment LED of outdoor unit control board as shown in the table.
  • Page 66 Test Run Display Title Cause of Error Outdoor unit Input Voltage High/ Low Outdoor unit input voltage is over 487V or below 270V Voltage Outdoor unit Inverter Compressor Start The First Start Failure by Outdoor unit Inverter Failure Compressor Abnormality Outdoor unit Inverter DC link High System is turned off by Outdoor unit DC Voltage Over Voltage...
  • Page 67 Test Run Display Title Cause of Error Outdoor unit Faulty IPM Temperature Outdoor unit IPM Temperature Sensor short/open Sensor Omitting connection of R, S, T power of Omitting connection of outdoor unit Outdoor unit Excessive capacity of indoor units Excessive connection of indoor units compared to capacity of Outdoor Unit Transmission error : inverter PCB ’...
  • Page 68 Test Run Display Title Cause of Error Communication Error Between Failing to receive Slave Unit signal at main PCB Outdoor unit and Other Outdoor Unit of Outdoor unit Outdoor unit Fan PCB Failing to receive fan signal at main PCB of unit. Communication Error Outdoor unit FAN IPM Fault Error Instant Over Current at Outdoor unit Fan IPM...

  • Page 69: New Function

    New Function New Function n Multi V III provides as following new functions. New Function Applied item Cooling/ Heating/ Fan Cool/Heat selector (PRDSBM) Cooling/ Heating/ All OFF Solution Accessory Demand control -. Low load operation -. DDC control (DC0~10V Input) ODU Dry contact (PQDSBDCVM0) Solution Accessory ODU Fan Low speed control...
  • Page 70 New Function 1 Cool/ Heat selector 1.1 Cool/ Heat Selector has provided two different functions. - Cooling/ heating/ Fan lock mode - Cooling/ heating/ All OFF mode [Installation] 1. Check the contents of Cool/ Heat Selector <Outdoor Dry Contact Main Body> <Front Case>...
  • Page 71 New Function 1.2 ODU Dry contact ODU Dry contact has provided Three different functions. - Demand control - Night Low Noise control - Error Alarm Monitoring function [ODU Dry contact] 1. SWDIP : Switch to select main function - Feature and Parts Naming 2.
  • Page 72 New Function 2. ODU Dry contact with Central controller : With Single Outdoor unit : With Series Outdoor units Multi-V WIRE ASSY 1(1EA) BUS_A Central Control BUS_B Devices CN_OUT Outdoor Unit Solo - Heat Pump...
  • Page 73 <With External power source> SW_VOLT2 SW_VOLT1 SW_VOLT2 SW_VOLT1 Notes Do not input the voltage signal in LG does not LG does not "NON VOLT" setting mode otherwise Connect separate supply this section supply this section it will cause serious damage...
  • Page 74 New Function 2. Using Analog signal with DDC Module SW_VOLT2 SW_VOLT1 DC 0~10V input Direct Digital Controller [Control Value] - Using Contact signal Cooling Heating Rotary Volt 100% Step Control Step Control Not-Control Not-Control 100% 100% Comp. System Control Comp OFF Comp OFF Signal Input...
  • Page 75 New Function - Using Analog signal with DDC Module Comp capacity Input_1 Input_2 Input_3 STEP Of outdoor unit(%) 100% No control COMP OFF No control COMP OFF No control Comp. System Control COMP OFF Signal No control Input Step ALL OFF No control ALL OFF No control...
  • Page 76 New Function 2.2 Night Low Noise control ODU Dry contact has provided Two methods for Night Low Noise Control - Automatically operating : Using previous method - Manual operating : Using simple switch and timer [Setting] - For ODU Dry contact Position Function L1 2 3 4...
  • Page 77 New Function 3. Independent power module The main PCB controls the EEV kit when the power is turn on. The independent sub PCB controls the EEV kit when the power is turn off. Concept of independent power module 3 phase 400V “...

  • Page 78: Caution For Refrigerant Leak

    Caution For Refrigerant Leak Caution For Refrigerant Leak The installer and system specialist shall secure safety against leakage according to local regulations or standards. The following standards may be applicable if local regulations are not available. Introduction Though the R410A refrigerant is harmless and incombustible itself , the room to equip the air conditioner should be large to such an extent that the refrigerant gas will not exceed the limiting concentration even if the refrigerant gas leaks in the room.
  • Page 79 Caution For Refrigerant Leak (3) With partition and without opening which serve as passage of air to adjoining room Outdoor unit Indoor unit Smallest room n Calculate refrigerant concentration Total amount of replenished In case the result of calculation exceeds refrigerant in refrigerant facility (kg) Refrigerant concentration the limiting concentration, perform the...

  • Page 80: Installation Guide At The Seaside

    Installation guide at the seaside Installation guide at the seaside CAUTION 1. Air conditioners should not be installed in areas where corrosive gases, such as acid or alkaline gas, are produced. 2. Do not install the product where it could be exposed to sea wind (salty wind) directly. It can result corrosion on the product.

This manual is also suitable for:

Multi v arun100lm3Multi v arun80lm3Multi v arun120lm3

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