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P/NO : MFL62049603

www.lg.com

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.

TYPE : AHU EXPANSION KIT
Models : PATX13A0E PATX20A0E PATX25A0E
PATX35A0E

PATX50A0E

ENGLISH

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Содержание PATX13A0E

Страница 1: ...ore 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 TYPE AHU EXPANSION KIT Models PATX13A0E PATX20A0E PATX25A0E PATX35A0E PATX50A0E ENGLISH ...

Страница 2: ...llation Scene 5 n Supplies 6 n EXPANSION KIT Installation 7 n Mechanical installation 7 n Brazing work 10 n Pipe cutting work 11 n Thermistor connection 12 n Leakage and vacuum test 15 n Leakage test 15 n Vacuum test 15 n Superheat Adjustment 16 n EXPANSION KIT installation confirmation plate preparation 17 ...

Страница 3: ...ation Do not store or use flammable gas or volatile substance near the air conditioner It can cause a fire or problem to the product Do not mix existing R22 pipe and installation products for the installation When you mix the mineral oil of R22 and R410A oil PVE it can decompose with water to cause problems to the product Do not mix other refrigerant with the designated refrigerant R410A during th...

Страница 4: ...n water always consult MULTI VTM AHU installation service provider It can cause a fire and electric shock Do not keep any heating devices near the product It can cause a fire After the product installation and repair always check for gas leakage It can cause problems in the product When installing the product always make sure to level to the product It can cause vibration and leakage Do not instal...

Страница 5: ...ows Installation components No Name Remarks Air Handling Unit EXPANSION KIT Connectable outdoor unit capacity PATX13A0E 8 16 HP PATX20A0E 18 26 HP PATX25A0E 28 36 HP PATX35A0E 38 46 HP PATX50A0E 48 56 HP AHU control box Outdoor unit Multi VTM Thermistor IN Sensor Ø5 Length 10m Line color Black Thermistor OUT Sensor Ø7 Length 10m Line color Red 90 Elbow PATX13A0E Ø15 88 Ø22 22 PATX20A0E Ø22 2 Ø28 5...

Страница 6: ... unit capacity 28 36HP Flow rate 59l min PATX35A0E Pipe diameter mm 41 3 34 92 28 58 L1 x L2 x W x H mm 491 x 331 x 238 x 174 Weight NET GROSS kg 6 2 7 5 Norminal capacity 35RT Applied Outdoor unit capacity 38 46HP Flow rate 59l min PATX50A0E Pipe diameter mm 41 3 34 92 28 58 L1 x L2 x W x H mm 561 x 331 x 291 x 192 Weight NET GROSS kg 8 5 10 Norminal capacity 50RT Applied Outdoor unit capacity 48...

Страница 7: ...l installation 1 Unscrew the 4 screws on the side cover of EXPANSION KIT 2 Disassemble the side cover 3 Unscrew the 2 screws on the top cover 4 Disassemble the top cover 5 Check the location and direction to install EXPANSION KIT on the AHU EXPANSION KIT Installation ...

Страница 8: ... Liquid pipe Gas pipe Gas pipe Gas pipe Refrigerant flowing direction based on cooling Gas pipe Liquid pipe Left side Left side Left side Horizontal installation Left side Right side Left side Horizontal installation Right side Left side Right side Horizontal installation Right side Right side Right side Vertical installation AHU EXPANSION KIT Heat exchanger pipe direction Checking door direction ...

Страница 9: ...side of the outdoor unit 10 When connecting the pipe on Outdoor unit and EXPANSION KIT always use the socket Field supply that fits the specification 11 As the size of the pipe connected to Outdoor unit and EXPANSION KIT can differ always use the socket Field supply that fits the specification 12 During all welding always follow the precautions Always have the nitrogen gas flow through as shown in...

Страница 10: ...e piping nitrogen must be set to 0 02 MPa with a pressure reducing valve just enough so that it can be felt on the skin CAUTION n The leakage test is executed by pressurizing nitrogen gas up to 3 8MPa 38 7kgf cm2 The test must be done with the service valve of the outdoor unit closed and the gas must be pressurized at the liquid pipe gas pipe and high low pressure common pipe of the outdoor unit a...

Страница 11: ...the refrigerant is not leaking during the welding n When the refrigerant is burnt it generates a toxic gas hazardous to the human body n Do not proceed the welding work in a closed location n After the pipe welding always do a leakage test WARNING n When welding the part always pass it through nitrogen If not the compressor may not work or can be damaged n Before After the welding wrap the area wi...

Страница 12: ...f EXPANSION KIT and tighten 2 screws 6 Use the flexible pipe and connector for the 2 types of connected Thermistor to pull them out of EXPANSION KIT 7 Always pull the Thermistor using the flexible pipe and use specified product Ø16 for the flexible pipe and connector 8 Assemble the side cover of EXPANSION KIT and screw the 4 screws 9 Fixate the flexible pipe inserted with the Thermistor to the AHU...

Страница 13: ...otary switch number and write the installation confirmation plate of EXPANSION KIT The error number displayed on AHU Controller in case of an error is displayed for the rotary switch number and error on Outdoor unit can be easily estimated during the service n 2 EXPANSION KIT and Outdoor unit are connected to one communication PCB and each is classified and connected Ex EXPANSION KIT A Outdoor uni...

Страница 14: ...A Outdoor unit 1 B Outdoor unit 2 Liquid pipe Gas pipe Gas pipe Liquid pipe Thermistor Thermistor Refrigerant flow direction based on cooling Refrigerant flow direction based on cooling AHU control box Refrigerant pipe AHU communication line Thermistor Communication PCB AHU Controller ...

Страница 15: ...l weight Use one that can measure up to 0 1kg If you cannot get a high precision weight you can also use the charging cylinder Ⓜ Vacuum pump Execute the vacuum test in the same criteria as MULTIVTM vacuum test As shown in the below picture close the service valve of the outdoor unit with the vacuum pump and execute the vacuuming process on the connecting pipe and AHU from the service port of the s...

Страница 16: ...se a malfunction in the refrigerant cycle to cause damages n As the refrigerant composition of R410A changes when inserted in gas condition always insert the refrigerant in liquid condition CAUTION 1 After removing the cap nut turn the stem clockwise to increases superheat decreases refrigerant flow 2 Superheat change per 1 turn of adjustment stem according to the evaporator temperature Factory se...

Страница 17: ...2 Gas pipe 41 3 Liquid pipe 28 58 Site name EXPANSION KIT Communication PCB rotary S W No Outdoor unit Connecting pipe size mm Model name Outdoor unit capacity No Model name Installation location AHU side Outdoor unit side PATX50A0E 48 56HP Gas pipe 41 3 Liquid pipe 34 92 Gas pipe 41 3 Liquid pipe 28 58 Site name EXPANSION KIT Communication PCB rotary S W No Outdoor unit Connecting pipe size mm Mo...

Страница 18: ...18 AHU EXPANSION KIT ...

Страница 19: ......

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