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PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT

21

ENGLISH

Welding

- Pipe connections can be done on the front side or on the side according to the installation envi-

ronments.

- Be sure to let 0.2kgf/cm

2

Nitrogen flow in the pipe when welding.

- If Nitrogen was not flown during welding, many oxidized membranes may form inside the pipe

and disturb the normal operations of valves and condensers.

1.MFL68645302(영) 16. 12. 7. 영영 6:10 Page 21

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Summary of Contents for UU70W

Page 1: ...ain this installation manual for future reference after reading it thoroughly Standard inverter Original instruction Representative LG Electronics Inc EU Representative LG Electronics European Shared Service Center B V Krijgsman 1 1186 DM Amstelveen The Netherlands Manufacturer LG Electronics Inc Changwon 2nd factory 84 Wanam ro Seongsan gu Changwon si Gyeongsangnam do KOREA ENGLISH ITALIANO ESPAÑ...

Page 2: ...condi tioner is used for many hours Clean the air filter once every 2 weeks Dust and impurities collected in the air filter may block the air flow or weaken the cooling dehumidifying functions For your records Staple your receipt to this page in case you need it to prove the date of purchase or for warranty purposes Write the model number and the serial number here Model number Serial number You c...

Page 3: ...ontained in the manual is intended for use by a qualified service technician familiar with safety procedures and equipped with the proper tools and test instruments Failure to carefully read and follow all instructions in this man ual can result in equipment malfunction property damage personal injury and or death Installation Do not use a defective or underrated circuit breaker Use this appliance...

Page 4: ...vaporator For installation always contact the dealer or an Authorized Service Center There is risk of fire electric shock explosion or injury Do not install the product on a defective installation stand It may cause injury accident or damage to the product Be sure the installation area does not deteriorate with age If the base collapses the air conditioner could fall with it causing property damag...

Page 5: ...the product To avoid vibration or water leakage Do not install the product where the noise or hot air from the outdoor unit could damage the neighborhoods It may cause a problem for your neighbors Use two or more people to lift and transport the product Avoid personal injury Do not install the product where it will be exposed to sea wind salt spray directly It may cause corrosion on the product Co...

Page 6: ...ipe connection Valve operation 18 PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT 18 Preparation Work 19 Pipe Drawing Out 22 Thermal insulation of refrigerant pipe 23 WIRING CONNECTION 23 Electrical Wiring 23 Connecting Cables between Indoor Unit and Outdoor Unit 26 Connecting the cable to Outdoor Unit 28 Forming the piping 29 LEAKAGE TEST AND EVACUATION 29 Preparation 29 Leakage test 30 Evacuati...

Page 7: ...nit and where even installation is possible Place that has no direct influence of snow or rain Place with no danger of snowfall or icicle drop Place without weak floor or base such as decrepit part of the building or with a lot of snow ac cumulation Install at a place with fluent water draining to prevent damage from localized heavy rain and avoid frequent flooded area Single Operation If installe...

Page 8: ...emote Controller Pipe Length Height Spec MAX Total L1 L2 L3 L4 L5 Main Pipe L1 Branch Pipe L2 L3 L4 L5 Each Indoor Outdoor H1 Indoor Indoor H2 L1 L2 L1 L3 L1 L4 L1 L5 A 80 40 40 10 30 1 70 10 Indoor Unit Refrigerant Additional charging g Duo Refrigerant L1 b x B L2 L3 x C Trio Refrigerant L1 b x B L2 L3 L4 x C Quartet Refrigerant L1 b x B L2 L3 L4 L5 x C Model b mm B g m UU70W 25 70 Pipe Diameter ...

Page 9: ...vertible Cassette Duct Convertible Cassette Duct Convertible UU85W UT36NN2 2 UM36N24 2 UV36NK2 2 CT24NP2 3 CM24N14 3 CB24LN32 3 CV24NJ2 3 CT18NQ2 4 CM18N14 4 CB18LN22 4 CV18NJ2 4 Applied Acces siries BD unit PMUB11A PMUB111A PMUB1111A Simple central controller PQCSZ250S0 NOTE When using synchro operation Do not use wireless remote controller Use only one wired remote controller in the indoor units...

Page 10: ...p 3 the LED01E red LED and LED02E green LED rapidly flickers When Addressing work is done green LED is off else LED LED01E stops flickering and lights continuously Ad dress of indoor unit is indicated on the wired remote control display window CH01 CH02 CH03 CH04 5 Press button to turn on the indoor 6 If you fail to perform the Addressing work repeat step 2 5 Outdoor Unit PCB Setting Procedure For...

Page 11: ...ake Outdoor Unit unstable resulting in a fall Use 2 belts of at least 8 m long Place extra cloth or boards in the locations where the casing comes in contact with the sling to prevent damage Hoist the unit making sure it is being lifted at its center of gravity When carrying the suspended unit pass the ropes between legs of base panel under the unit Always lift the unit with ropes attached at four...

Page 12: ...th of at least 100mm under the Unit s legs before being fixed The outdoor unit supports should have minimum height of 200mm Anchor bolts must be inserted at least 75mm At least 100mm At least 100mm At least 100mm At least 100mm At least 100mm At least 100mm Center of the Unit For outdoor units should not be supported only by the corner supports Center of the Unit 920 618 330 360 INSTALLATION Unit ...

Page 13: ...e freezing of the heat exchanger resulting in abnormal operations Be sure to remove the Pallet Wood Support of the bottom side of the outdoor unit before welding Not removing Pallet Wood Support causes hazard of fire during welding WARNING Install where it can sufficiently support the weight of the outdoor unit If the support strength is not enough the outdoor unit may drop and hurt people Install...

Page 14: ...utdoor units than put them on pipe tube having completed burr removal Not possible to put them on after flaring work Flaring work Carry out flaring work using dedicated flaring tool for R 410A as shown below Firmly hold copper tube in a bar or die as in dicated dimension in the table above Check Compare the flared work with figure below If flare is noted to be defective cut off the flared section ...

Page 15: ...not cold and warm Clogging of EEV Capillary Gas shortages Degradation of refrigerant oil Poor insulation of the com pressor Do not cold and warm Counter measure No moisture in the pipe Until the connection is completed the plumbing pipe entrance should be strictly controlled Stop plumbing at rainy day Pipe entrance should be taken side or bottom When removal burr after cutting pipe pipe entrance s...

Page 16: ... degradation of refrigerant oil Because it is flammable it is strictly prohibited to use Carbon dioxide Degrade the drying characteristics of gas Chevron Gas Toxic gas occurs when exposed to direct flame 2 Always use a pressure reducing valve 3 Please do not use commercially available antioxidant The residual material seems to be the oxide scale is observed In fact due to the organic acids generat...

Page 17: ...anching parts Use hexagonal wrench to open close the valve Liquid pipe Gas pipe CAUTION Please block the pipe knock outs of the front and side panels after installing the pipes Animals or foreign objects may be brought in to damage wires WARNING Always careful not to leak the refrigerant during welding The refrigerant generates poisonous gas harmful to human body if combusted Do not perform weldin...

Page 18: ...irection Nitrogen Direction Preparation Work Use Knock Outs of Base Pan of the outdoor unit for Left Right or Bottom pipe drawing outs Removal Area for Liquid Gas pipe bottom side connections Gas pipe Liquid pipe Wet towel CAUTION Do not give damage to the pipe base during the Knock Out work Proceed to pipe work after removing burr after Knock Out work Perform sleeve work to prevent damage to the ...

Page 19: ...quid gas pipes are locked Extract remaining refrigerant or air inside using the service port Remove the leakage prevention cap Service Port Leakage Prevention Cap Liquid pipe Gas pipe Pipe Drawing Out Method of drawing out pipes on the front side and right side Proceed with the pipe work as shown in the below figure for front side and right side pipe draw ing out Pipe Knock Out for Liquid Gas pipe...

Page 20: ...rawing out common pipe through base panel Method of drawing out pipes on the rear side Proceed with the pipe work as shown in the below figure for rear side pie drawing out Liquid pipe Gas pipe Remove only liquid gas pipe Knock out Pipe Knock Out for Liquid Gas pipes Pictures may differ depending on the model ...

Page 21: ...one on the front side or on the side according to the installation envi ronments Be sure to let 0 2kgf cm2 Nitrogen flow in the pipe when welding If Nitrogen was not flown during welding many oxidized membranes may form inside the pipe and disturb the normal operations of valves and condensers ...

Page 22: ...f hemp cloth Zinc plate Oily paint NOTE When using polyethylene cover as cover ing material asphalt roofing shall not be required NOTE Recommended Insulation material Material EPDM Thickness 15mm Gas pipe and 19mm Liquid pipe or over Density less than 0 032 0 005 g cm2 Thermal conductivity less than 0 03 kcal m hr C Cutting line of insulation must look upper direction Thickness of insulation is 15...

Page 23: ... N 3 1 L Remote Controller CN REMO 2 N 3 1 L 2 N 3 1 L 2 N 3 1 L 2 N 3 4 4 4 4 5 5 5 5 1 L When using simultaneous Operation System use only one wired remote controller in the indoor units Simultaneous Operation Unit 2 3 4 Main Unit1 POWER INPUT 380V 415V3N T N R S POWER INPUT 220V 240V 1 L 2 N 3 2 N 3 1 L CST DUCT CVT Electrical Wiring Perform the electrical wiring work according to the electrica...

Page 24: ...ONAL AREA The connecting cable connected to the outdoor unit should be complied with IEC 60245 or HD 22 4 S4 This equipment shall be provided with a cord set complying with the national regulation 20mm GN YL NORMAL CROSS SECTIONAL AREA 1 0mm2 When the connection line between the indoor unit and outdooor unit is over 40m connect the telecommunication line and power line separately If the supply cor...

Page 25: ...er than or equal to the minimum Ssc value European International Technical Standard setting the limits for harmonic currents produced by equipment connected to public low voltage systems with input current 16 A and 75 A per phase Model Minimum Ssc Value kVA UU70W 3 351 Precautions when laying power wiring Use round pressure terminals for connections to the power terminal block Round pressure termi...

Page 26: ...1 6mm2 or more to the panel of control box marked as and fasten with earth screw Power cord terminal Connecting cable terminal Cord clamp Cord clamp Make sure the rubber bushes are Properly used in knock out holes after connecting main power cable CAUTION The circuit diagram is not subject to change without notice Be sure to connect wires according to the wiring diagram Connect the wires firmly so...

Page 27: ...rated abnormally Example Connection of power and communication cable Main power Terminal block Ground wire Hold power cable Hold communication cable Over 50mm gap Power Ground cable Communication cable Front side Main power Terminal block Insulation sleeves attachments Power Ground cable ODU IDU Communication cable Fix firmly not to be displaced Main Power and Communication Connection ...

Page 28: ... Power supply cord Plastic Plastic band band Plastic band Seal a small Seal a small opening around opening around the pipings with the pipings with gum type sealer gum type sealer Seal a small opening around the pipings with gum type sealant Trap Seal a small opening around the pipings with gum type sealer In cases where the outdoor unit is installed above the indoor unit perform the following Tap...

Page 29: ...rv ice valve caps from both the gas and the liquid side on the outdoor unit Check that both the liq uid and the gas side service valves on the outdoor unit are kept closed at this stage Leakage test Connect the manifold valve with pressure gauges and dry nitrogen gas cylinder to this service port with charge hoses Pressurize the system to no more than 3 8 Mpa with dry nitrogen gas and close the cy...

Page 30: ...re nut securely with an adjustable wrench This process is very important to prevent leakage from the system Replace the valve caps at both gas and liquid side service valves and fasten them tight This completes air purging with a vacuum pump The air conditioner is now ready to test run 1 Do a leakage test of all joints of the tub ing both Indoor unit and outdoor unit and both gas and liquid side s...

Page 31: ...r test run carry out the cooling operation firstly even during heating season If heating oper ation is carried out firstly it leads to the trouble of compressor Then attention must be paid Carry out the test run more than 5 minutes without fail Test run will be cancelled 18 minutes later automatically Is the circulation of air adequate Is the draining smooth Is the heat insulation complete refrige...

Page 32: ...give rise to burn out of the wires 4 Specification of power source 5 Confirm that electrical capacity is sufficient 6 Be sure that the starting voltage is maintained at more than 90 percent of the rated voltage marked on the name plate 7 Confirm that the cable thickness is as specified in the power sources specification Particularly note the relation between cable length and thickness 8 Never fail...

Page 33: ...nv 3times 2times OFF 35 Low pressure Error 3times 5times OFF 41 Inv D Pipe Th Error Open Short 4times 1time OFF 43 Pressure Sensor Error 4times 3times OFF 44 Outdoor air Th Error Open Short 4times 4times OFF 45 Cond Middle Pipe Th Error Open Short 4times 5times OFF 46 Suction Pipe Th Error Open Short 4times 6times OFF 48 Cond Out Pipe Th Error Open Short 4times 8times OFF 51 Capacity over 5times 1...

Page 34: ... 8 9 10 Saving Power Consumption Step 2 1 2 3 4 5 6 7 8 9 10 Mode Lock Cooling 1 2 3 4 5 6 7 8 9 10 Mode Lock Heating 1 2 3 4 5 6 7 8 9 10 Night Quiet Mode Step 1 1 2 3 4 5 6 7 8 9 10 Night Quiet Mode Step 2 1 2 3 4 5 6 7 8 9 10 Mode Lock Cooling Night Quiet Mode Step 1 1 2 3 4 5 6 7 8 9 10 Mode Lock Cooling Night Quiet Mode Step 2 1 2 3 4 5 6 7 8 9 10 Mode Lock Cooling Saving Power Consumption St...

Page 35: ...5 6 7 8 9 10 Synchro_Quartet CAUTION Unless the applicable dip switch is set properly the product may not work If you want to set a specific function request that the installer sets the dip switch appropri ately during installation WARNING When you set the dip switch you should turn off the circuit breaker or shut the power source of the product down ...

Page 36: ...om localized heavy rain and avoid frequent flooded area CAUTION Air conditioners should not be installed in areas where corrosive gases such as acid or alkaline gas are produced Do not install the product where it could be exposed to sea wind salty wind directly It can result corrosion on the product Corrosion particularly on the condenser and evaporator fins could cause product malfunction or ine...

Page 37: ...esentative LG Electronics Inc EU Representative Krijgsman 1 1186 DM Amstelveen The Netherlands Manufacturer LG Electronics Inc Changwon 2nd factory 84 Wanam ro Seongsan gu Changwon si Gyeongsangnam do KOREA ...

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