LG MULTI V MINI ARUN047GS2 Installation Manual
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LG MULTI V MINI ARUN047GS2 Installation Manual

LG MULTI V MINI ARUN047GS2 Installation Manual

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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.
System
P/NO : MFL46912318
Copyright © 2010 - 2018 LG Electronics Inc. All Rights Reserved.
www.lg.com

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  • 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. System www.lg.com P/NO : MFL46912318 Copyright © 2010 - 2018 LG Electronics Inc. All Rights Reserved.
  • Page 2 IMPORTANT! Please read this instruction sheet completely before installing the product. This air conditioning system meets strict safety and operating standards. As the installer or service person,it is an important part of your job to install or service the system so it operates safely and efficiently.

  • Page 3: Table Of Contents

    ARUN Series Outdoor Unit Installation Manual TABLE OF CONTENTS Safety Precautions......................4 Installation Process ....................8 Outdoor Units Information ..................9 Before installation.....................10 Select the Best Location ..................11 Installation Space .....................12 Installation .........................16 Refrigerant piping .....................19 Electrical Wiring......................38 Test Run........................53 Caution For Refrigerant Leak ..................63 Installation guide at the seaside................65 Installation Manual 3...

  • Page 4: 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 5 Safety Precautions • When installing and moving the air conditioner to another site, do not charge it with a different refrigerant from the refrigerant specified on the unit. - If a different refrigerant or air is mixed with the original refrigerant, the refrigerant cycle may malfunction and the unit may be damaged.
  • Page 6 Safety Precautions Installation • Always check for gas (refrigerant) leakage after installation or repair of product. - Low refrigerant levels may cause failure of product. • Do not install the product where the noise or hot air from the outdoor unit could damage the neighborhoods.
  • Page 7 Safety Precautions • Install and insulate the drain hose to ensure that water is drained away properly based on the installation manual. - A bad connection may cause water leakage. • Be very careful about product transportation. - Only one person should not carry the product if it weighs more than 20kg (44lbs). - Some products use PP bands for packaging.

  • Page 8: Installation Process

    Installation Process Installation Process Indicate clearly who is to be responsible for switch settings Determination of division work Make relationship between outdoor, indoor, remote controller, and option connections clear. Preparation of contract drawings (Prepare control circuit diagram) Take account of gradient The foundation must be level even Sleeve and insert work Outdoor unit foundation work...

  • Page 9: Outdoor Units Information

    Outdoor Units Information Outdoor Units Information CAUTION Ratio of the connectable Indoor Units to the Outdoor: Within 50 ~ 130% Ratio of running Indoor Units to the Outdoor: Within 10 ~ 100% A combination operation over 100% cause to reduce each indoor unit capacity. Power Supply: Outdoor Unit (1Ø, 208/230V, 60Hz) System(HP) Model...

  • Page 10: Before Installation

    Before Installation Before Installation 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 characteris- tic 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 11: Select The Best Location

    Select the Best Location Select the Best Location 1. Select space for installing outdoor unit, which will meet the following conditions: • No direct thermal radiation from other heat sources • No possibility of annoying neighbors by noise from unit •...

  • Page 12: Installation Space

    Installation Space Installation Space • The following values are the least space for installation. If any service area is needed for service according to field circumstance, obtain enough service space. • The unit of values is mm. n In case of obstacles on the suction side 1.
  • Page 13 Installation Space n In case of obstacles on the discharge side 1. Stand alone installation 2. Collective installation Unit:mm(inch) n In case of obstacles on the suction and the discharge side Ú Obstacle height of discharge side is higher than the unit 1.
  • Page 14 Installation Space 2. Collective installation L > H L > H Unit:mm(inch) Ú Obstacle height of discharge side is lower than the unit 1. Stand alone installation 2. Collective installation Unit:mm(inch) Outside Unit...
  • Page 15 Installation Space Collective / Continuous Installation for roof top use Space required for collective installation and continuous installation: When installing several units, leave space between each block as shown below considering passage for air and people. 1. One row of stand alone installation Unit:mm(inch) 2.

  • Page 16: Installation

    Installation 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 17: Preparation Of Piping

    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. n Use the accessory piping kit or the pipes purchased Copper Slanted Uneven Rough locally.
  • Page 18 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 19: Refrigerant Piping

    Installation Closing shutoff valve 1. Remove the cap and turn the valve clockwise with the hexagon wrench. 2. Securely tighten the valve until the shaft contacts the main body seal. 3. Make sure to tighten the cap securely. * For the tightening torque, refer to the table on the below. Tightening torque Outside diameter Torque...
  • Page 20 Refrigerant Piping Refrigerant Piping n Connecting the pipes to the outdoor unit • Braze suitable field piping with service valve of gas pipe. CAUTION Take care so that there is no thermal damage on the service valves of the outdoor unit. (Especially packing part of service port.) Wrap the Wet towel service valve with a wet towel when brazing it as...
  • Page 21 Refrigerant Piping CAUTION • Make sure that pipe doesn't contact with the compressor terminal cover and comp bolt. • Always insulate the liquid and gas-side field piping and branch. Cautions for Handling Service Valve • The service valves are closed at shipment from the factory CAUTION Make sure to keep the valve open during operation 1.
  • Page 22 Refrigerant Piping How to Use the Shut-Off Valve Use hexagonal wrenches 4mm or 6mm (1/6 inch or 1/4 inch) • Opening the valve 1. Place the hexagon wrench on the valve bar and turn counter-clockwise. 2. Stop when the valve bar no longer turns. It is now open. •...
  • Page 23 Refrigerant Piping 6. If the diameters of the branch piping of the designated refrigerant piping differs, use a pipe cutter to cut the connecting section and then use an adapter for connecting different diameters to connect the piping. 7. Always observe the restrictions on the refrigerant piping (such as rated length, difference in height, and piping diameter).
  • Page 24 Refrigerant Piping WARNING When installing and moving the air conditioner to another site, be sure to make recharge refrigerant after perfect evacuation. - If a different refrigerant or air is mixed with the original refrigerant, the refrigerant cycle may malfunction and the unit may be damaged.
  • Page 25 Refrigerant Piping Selection of Refrigerant Piping Outdoor unit Gas pipe Liquid pipe Branching pipe Main pipe Indoor unit Branching pipe Piping parts Name Selection of pipe size Size of main pipe Liquid pipe Gas pipe Outdoor unit Outdoor unit capacity type [mm(inch)] [mm(inch)] ①...
  • Page 26 Refrigerant Piping Allowable Length/Height Difference of Refrigerant Piping n Y Branch Method [Unit:m(ft)] Example : 5 Indoor Units connected Ⓐ : Outdoor Unit Ⓑ : 1st branch (Y branch) Ⓒ : Indoor Units L150 (492) l 40 (131) h15(49) Ú Total pipe length = A+B+C+D+a+b+c+d+e ≤ 300m(984ft) Longest pipe length Equivalent pipe length A+B+C+D+e ≤...
  • Page 27 Refrigerant Piping n Header Method [Unit:m(ft)] Example : 6 Indoor Units connected Ⓐ : Outdoor Unit Ⓑ : 1st branch Ⓒ : Indoor Units Ⓓ : Sealed piping L150 (492) 40 (131) h15(49) Ú Total pipe length = A+a+b+c+d+e+f ≤ 300m(984ft) Longest pipe length * Equivalent pipe length A+f ≤...
  • Page 28 Refrigerant Piping n Combination of Y branch/header method [Unit:m(ft)] Example : 5 Indoor Units connected Ⓐ : Outdoor Unit Ⓑ : 1st branch (Y branch) Ⓒ : Y branch Ⓓ : Indoor Unit Ⓔ : Header Ⓕ : Sealed piping L150 (492) 40 (131) Branch pipe can not be used after header...
  • Page 29 Refrigerant Piping The Amount of Refrigerant The calculation of the additional charge should take into account the length of pipe. Product charge(lbs) Length(ft) of Additional charge(lbs) x 0.041(lbs/ft) liquid pipe of Ø 3/8 in Length(ft) of x 0.015(lbs/ft) liquid pipe of Ø1/4 in Correction factor of outdoor unit Correction factor of...
  • Page 30 Refrigerant Piping CAUTION If a negative result is obtained from the calculation, no refrigerant needs to be added. 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 ≤...
  • Page 31 Refrigerant Piping 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 31...
  • Page 32 Refrigerant Piping 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° Viewed from point A in direction of arrow Within ±...
  • Page 33 Refrigerant Piping • 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 • Fit branch pipe lie in a horizontal plane. Horizontal plane View from point B in the direction of the arrow •...
  • Page 34 Refrigerant Piping Selection of Y Branch and Header 1. Y Branch [unit:mm] Models Gas pipe Liquid pipe I.D12.7(1/2) I.D12.7(1/2) I.D6.35(1/4) I.D15.88(5/8) I.D15.88(5/8) I.D.6.35(1/4) I.D9.52(3/8) I.D9.52(3/8) I.D15.88(5/8) I.D.6.35(1/4) ARBLN01621 I.D12.7(1/2) I.D.9.52(3/8) I.D19.05 O.D9.52(3/8) O.D15.88(5/8) (3/4) I.D12.7(1/2) I.D22.2(7/8) I.D19.05(3/4) I.D15.88(5/8) I.D19.05(3/4) I.D12. 7(1/2) I.D12.7(1/2) I.D9.52 I.D9.52...
  • Page 35 Refrigerant Piping 2. Header [Unit:mm(inch)] Models Gas pipe Liquid pipe 360(14-5/32) 360(14-5/32) 120(4-23/32) 120(4-23/32) ID12.7(1/2) ID6.35(1/4) ID6.35(1/4) 4 branch ID12.7(1/2) ID9.52(3/8) ID15.88(5/8) ID9.52(3/8) (5-29/32) ARBL054 (5-29/32) (4-23/32) ID15.88(5/8) (4-23/32) ID12.7(1/2) ID9.52(3/8) ID15.88(5/8) ID19.05(3/4) 540(21-1/4) 540(21-1/4) 120(4-23/32) 120(4-23/32) ID12.7(1/2) ID6.35(1/4) 7 branch ID12.7(1/2) ID9.52(3/8) ID15.88(5/8)

  • Page 36: Thermal Insulation Of Refrigerant Piping

    Refrigerant Piping 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 37: Leak Test And Vacuum Drying

    Refrigerant Piping Leak Test and Vacuum Drying 1. Leak test Leak test should be made by pressurizing nitrogen gas to 38.7 kgf/cm (551 psi). 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 38 Refrigerant Piping 2. Vacuum Vacuum drying should be made from the service port provided on the outdoor unit’s service valve to the vac- uum pump commonly used for liquid pipe, gas pipe. Vaccum of the pipe and the indoor units should be made from the port of the outdoor unit's service valve with the service valve closed.

  • Page 39: Refrigerant Charging

    Refrigerant Piping 3. Refrigerant charging Follow following procedure to charge the refrigerant. 1. Open all service valves 2. Run the unit with cooling mode 3. Charging the refrigerant to gas service valve during operation. Charging during Open Open cooling operation Refrigerant cylinder CAUTION...

  • Page 40: Electrical Wiring

    Electrical Wiring Electrical Wiring Electrical Wiring 1. 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 41 Electrical Wiring Outdoor Unit Outdoor Unit Indoor Indoor Indoor Indoor Unit Unit Unit Unit Remote Remote Remote Remote control control control control Outdoor Unit Outdoor Unit Indoor Indoor Indoor Indoor Unit Unit Unit Unit Remote Remote Remote Remote control control control control 2-Core Shield Cable...
  • Page 42 Electrical Wiring 2. Communication and Power Lines 1) Communication cable • Types : shielding wire CVVS or CPEVS • Cross section : over 1.25mm (0.002 in • Insulation material : PVC • Maximum allowable temperature: 60°C(140°F) • Maximum allowable line length: 300m(984ft) 2) Remote control cable •...

  • Page 43: Wiring Of Main Power Supply And Equipment Capacity

    Electrical Wiring Wiring of Main Power Supply and Equipment Capacity Outdoor unit (1Ø, 208/230V, 60Hz), Indoor unit (1Ø, 208/230V, 60Hz) 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 proceed- ing with the wiring and connections.
  • Page 44 Electrical Wiring u Precautions when laying power and ground wiring Use round pressure terminals for connections to the power terminal block. When laying ground wiring, you must use round pressure terminals. Power wire(Ground wire) Round pressure terminal When none are available, follow the instructions below. •...
  • Page 45 Electrical Wiring Connection method of the connecting cable (Example) 1. Make a hole appropriate for the passage of connection cable through on cap by tool. 2. After knocking out the holes, we recommend you paint the edges and areas around the edges using the repair paint to prevent rusting 3.
  • Page 46 Electrical Wiring Example Connection of Communication Cable 1. 60Hz : Single phase of power supply line(L, N) : Communication line (3 line): Wired remote control : Communication line (2 shield line): Power supply switch Between Indoor Unit and Outdoor Unit Single Phase 3wires (Switch fuse : ELCB) (L1,L2,GND)
  • Page 47 Electrical Wiring n Example Connection of Communication Cable [BUS type] • Connection of communication cable must be installed like below figure between indoor unit to outdoor unit. [STAR type] • Abnormal operation can be caused by communication defect, when connection of communication cable is installed like below figure(STAR type).
  • Page 48 Electrical Wiring Location of DIP Switch 1. When outdoor unit is powered on after configuring the DIP switch, prop- Main PCB er input of configuration value can be verified through 7-Segment. SW02V Auto addressing 2. This function is shown only for 2 seconds after turning on the power. 7 - Segment SW01V n Verification of outdoor unit configuration...
  • Page 49 Electrical Wiring CAUTION 1. “X” mark means DIP switch must be off, Otherwise the function may not perates correctly. 2. If each DIP switch doesn’t set correctly, unit will operate abnormally. 3. In case of proceeding test run, start after checking if all indoor unit is off. Automatic Addressing SW02V •...
  • Page 50 Electrical Wiring u The Procedure of Automatic Addressing Power On All DIP switch should be off before auto adressing Waiting 3 minutes Press SW02V for 5 sec. Auto addressing start 7-segment LED = 88 • Auto addressing setting end Waiting about 2~7 minutes Numbers of indoor unit connection set whose addressing is completed are indicated for 30seconds on 7-segment LED after completing setting...
  • Page 51 Electrical Wiring u How to connect central controller (U3 Chassis, 2 Fan Model) - The communication lines connected to INTERNET terminal should be connected to central control of Outdoor unti with care for their polarity( A ’ A, B ’ B ) - Connect communication lines between outdoor unit and indoor units through the terminal block.
  • Page 52 Push Button n 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. Connect signal terminal block as below figure and description.

  • Page 53: Test Run

    Test Run Test Run Checks before Test Run 1. Test run should be performed after auto-addressing 2. Test run can be performed when 3 minutes passed after power on, by DIP switches and buttons. - needs time for initializing data of micom and readying communication with indoor unit. 3.
  • Page 54 Test Run Sensor Checking Function (U3 Chassis, 2Fan Model) Note 1) Sensor checking function judges whether the current temperature of indoor and outdoor unit sensors is right or not. It checks 3 indoor temperature sensors, 9 outdoor temperature sensors, 2 outdoor pressure sensors. It is used for judging sensor abnormality.
  • Page 55 Test Run Sensor Check Error Code Display Error display during sensor inspection process is composed of 3 stages as shown below, and is proceeded by repeating these stages n Step 1 : Display of error existence : 309 or 319 - 309 : Inspect sensors of outdoor unit - 319 : Inspect sensors of indoor unit n Step 2: Display of error location...
  • Page 56 Test Run Refrigerant Auto Charging Function 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. Note Start 1. After installing the refrigerant charging device as shown below in figure, open the valve.
  • Page 57 Test Run Charging port manifold 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. If designated capillary assembly isn't used, the system may get damaged.

  • Page 58: Refrigerant Checking Function

    Test Run Refrigerant Checking Function This function charges appropriate amount of refrigerant automatically through cycle operation. This function judges refrigerant leakage and overcharging. Start Note 1. In case air temperature is out of guaranteed Main temperature, refrigerant checking function may end Wait for 3 min.
  • Page 59 Test Run CAUTION 1. Guaranteed Temperature range(Error occurs out of guaranteed temperature range) IDU : 68~89.6°F ODU : 32~109.4°F 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 60: Night Silent Operation

    Test Run Night Silent Operation 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. U3 Chassis (2 Fan Model) DIP switch No.12+14 ON SW02V SW01B SW01V...
  • Page 61 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 62 Test Run Display Title Cause of Error Outdoor Unit Inverter Compressor System is turned off by outdoor unit Inverter High Discharge Temperature Compressor High Discharge Temperature High Pressure of Outdoor Unit System is turned off by excessive increase of high pressure of outdoor unit Low Pressure of Outdoor Unit System is turned off by excessive decrease of low...

  • Page 63: 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 enough to such an extent that the refrigerant gas will not exceed the limiting concentration even if the refrigerant gas leaks in the room.
  • Page 64 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(lbs)) Refrigerant concentration the limiting concentration, perform the...

  • Page 65: Installation Guide At The Seaside

    3) Select a well-drained place. 1. If you can’t meet above guide line in the seaside installation, please contact LG Electronics for the additional anticorrosion treatment. 2. Periodic ( more than once/year ) cleaning of the dust or salt particles stuck on the heat exchanger by using water...
  • Page 66 Installation Guide at the Seaside Outside Unit...
  • Page 67 550 Matheson Blvd. East, Mississauga, Ontario, L4Z 4G3 Please call the installing contractor of your product, as warranty service will be provided by them. Service call Number # : (888) LG Canada, (888) 542-2623 CANADA Numéro pour les appels de service : LG Canada, 1-888-542-2623...

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