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LG B70AWYN985 Installation Manual Download Page 31

WIRING

ENGLISH

3

1

Indoor unit

- Remove the control box cover for electrical

wiring between the indoor and outdoor unit.

- Use the cord clamper to fix the wiring cable.

- Connect the wiring cable of diameter

2.5mm

2

or more, to the panel of control box,

marked as 

and fasten with earth screw.

Outdoor unit

- Remove the control cover for wiring cable-

connection.

- Use the cord clamper to fix the wiring cable.

- Fix the earth cable

- Connect the wiring cable of diameter

2.5mm

2

or more, to the panel of control box,

marked as 

and fasten with earth screw.

A view

Motor PCB

Main PCB

Control box cover

A

Communication 

wiring cable

Between the 

indoor unit and 

the outdoor unit

Remote 

wiring cable

• 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 that not to

be pulled out easily.

• Connect the wiring cables according to

color codes by referring the wiring dia-
gram.

• In Australia, the length of power supply

cable measured from the entry of the
power supply cable to the middle of live
pin on the power plug should be over
1.8m.

CAUTION

!

Noise filter

Main PCB

Magnet switch

Reactor
Bridge diode

Inverter PCB

Inverter  fan PCB

Take care of the phase 
sequence of 3-phase 4-wire 
power system

1(L)

2(N)

POWER SUPPLY

1Ø 220-240V 50Hz 

3(A) 4(B)

POWER SUPPLY

3Ø 380-415V 50Hz 

SODU

IDU

INTERNET

DRY

GND 12V

B

A

B

A

B

A

B

A

COMMUNICATION

[ODU]

[IDU]

R

S

T

N

Summary of Contents for B70AWYN985

Page 1: ...mpletely 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 CEILING CONCEALED DUCT MODEL B70AWYN985 B70AWYUX85 ENGLISH ...

Page 2: ... Thermal insulation of refrigerant pipe 27 Forming the pipe 28 Leakage test and evacuation 28 Preparation for leakage test and evacuation 28 Leakage test 29 Vacuum 30 WIRING 30 Electrical Wiring 30 Precautions when laying power wiring cable 31 Indoor unit wiring 31 Outdoor unit wiring 32 Communication and Power wiring cable 33 Wiring of main power supply and equipment capacity 34 Field Wiring 35 C...

Page 3: ...teriorate if the air condition er 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 numbe...

Page 4: ...k of fire or electric shock For electrical work contact the dealer seller a qualified electrician or an Authorized Service Center Do not disassemble or repair the product There is risk of fire or electric shock Always ground the product There is risk of fire or electric shock Install the panel and the cover of control box securely There is risk of fire or electric shock Always install a dedicated ...

Page 5: ... check for gas refrigerant leakage after installation or repair of product Low refrigerant levels may cause failure of product Install the drain hose to ensure that water is drained away properly A bad connection may cause water leakage Keep level even when installing the product To avoid vibration or water leakage Do not install the product where the noise or hot air from the outdoor unit could d...

Page 6: ...tch setting Determination of division work The vacuum pump used must have a capacity of reaching at least 5 torr more than 1 hour Vacuum drying Recharge correctly as calculated in this manual and record the amount of added refrigerant Additional charge of refrigerant Make sure there are no gaps left between the facing materials used on the ceiling Fit facing panels Run each indoor unit in turn to ...

Page 7: ...INTRODUCTION ENGLISH 7 Air outlet vents Air intake vents Air outlet vents Air intake vents Remote controller Accessory Features ...

Page 8: ...all thickness of the pipe should comply with the relevant local and na tional regulations for the designed pres sure 3 8MPa Since R 410A is a mixed refrigerant the required additional refrigerant must be charged in its liquid state If the refrigerant is charged in its gaseous state its composition changes and the system will not work properly Do not place the refrigerant container under the direct...

Page 9: ...ution and spray sulfur are often used Do not use unit under any special environ ment where oil steam and sulfuric gas exist It is recommended to fence round the out door unit in order to prevent any person or animal from accessing the outdoor unit If installation site is area of heavy snowfall then the following directions should be observed Make the foundation as high as possible Fit a snow prote...

Page 10: ...all allow easy water drainage The place shall easily connect with the outdoor unit The place where the unit is not affected by an electrical noise The place where air circulation in the room will be good There should not be any heat source or steam near the unit Suitable dimension H is necessary to get a slope to drain H 200 or more Top view unit mm Front view unit mm Front Inspection hole Air Int...

Page 11: ...tegory Installation Space Case1 10mm Side Space 49mm Case2 Side Space 49mm 4 sides are walls A 10 B 300 C 10 D 500 A 50 B 100 C 50 D 500 Only 2 sides are walls A 10 B 300 Limitations on the height of the wall Refer to 4 side walls The height of the wall on the front side must be 1500mm or less The height of the wall on the intake side must be 500mm or less There is no limit to the wall on the side...

Page 12: ...break for easy air flow Select a well drained place Sea wind Sea wind Sea wind Windbreak Periodic more than once year cleaning of the dust or salt particles stuck on the heat exchanger by using water 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 I...

Page 13: ...lace where the unit can withstand its vibration A place where service can be easily per formed Select and mark the position for fixing bolts Drill the hole for set anchor on the face of ceiling Dimension Capacity A B C D E F G H I J K L 70 kBtu h 1594 1044 286 464 657 821 1368 1622 392 458 1563 791 H K G B A E F C D L I J Air Intake Air Outlet M10 Nut X 4 M10 SP washer X 4 M10 washer X 4 Local sup...

Page 14: ...10 Spring washer M10 Nut W3 8 or M10 Suspension bolt W3 8 or M10 1 Set anchor Old building New building 2 Plate washer 3 Spring washer 4 Nut 5 Suspension bolts Tighten the nut and bolt to prevent unit falling CAUTION Install declination of the indoor unit is very important for the drain of the duct type air conditioner Always lay the in door unit with downward inclination 0 8 to 1 3 Prevent any up...

Page 15: ...efully un clip the three thermistor leads and push the leads through the back of the electrical box Unscrew 5 screws and separate the heat exchanger section from unit Carefully un latch the heat exchanger section from the fan deck section by lifting up the heat ex changer section and then pulling away En sure that the thermistor or expansion valve motor cables do not catch on either section as the...

Page 16: ...then back down And screw the 5 screws the heat ex changer section with unit Secure the two sections together with the 5 bolts Re attach the side lock strap Re connect the unplugged cables Reassemble the control box cover Carefully replace the fan deck section top cover and secure the cover with the screws Checking the Drainage Checking the Drainage Check the drainage Spray one or two glasses of wa...

Page 17: ...ty drainage There is no need to provide a trap for the safety drainage If the safety drainage pipe is connected to the main drainage pipe make the connection below the trap on the main drainage pipe Drill the pipe hole with 65mm dia hole core drill Pipe hole should be slightly slant to the out door side U Trap B C A 70mm B 2C C 2 x SP SP External Pressure mmAq Ex External Pressure 10mmAq A 70mm B ...

Page 18: ...a mean for transportation because they are danger ous Do not touch heat exchanger fins with your bare hands Otherwise you may get a cut in your hands Tear plastic packaging bag and scrap it so that children cannot play with it Oth erwise plastic packaging bag may suffo cate children to death When carrying in Outdoor Unit be sure to support it at four points Carrying in and lifting with 3 point sup...

Page 19: ...ave width of at least 100mm under the Unit s legs before being fixed The outdoor unit supports should have mini mum height of 200mm Anchor bolts must be inserted at least 75mm At least 100mm At least 100mm At least 100mm At least 100mm 730 920 792 760 65 65 Unit mm At least 65 At least 65 The outdoor unit installation The location of the Anchor bolts for outdoor unit ...

Page 20: ...port strength is not enough the outdoor unit may drop and hurt people Install where the outdoor unit may not fall in strong wind or earthquake If there is a fault in the supporting conditions the outdoor unit may fall and hurt people Please take extra cautions on the supporting strength of the ground water outlet treat ment treatment of the water flowing out of the outdoor unit in operation and th...

Page 21: ...tandard pipe length is 7 5m If the pipe length exceeds 7 5m Need to additional charge of the refrigerant which according to the table If 72kBtu h model is installed at a distance of 100m 5 550g of refrigerant should be added 100 7 5 x61g 5 643g Capacity is based on standard length and maximum allowance length is on the basis of reli ability Improper refrigerant charge may result in abnormal cycle ...

Page 22: ...f pipe Put the end of the copper pipe to downward direction as you remove burrs in order to avoid to let burrs drop in the pipe Welding Pipe connections can be done on the front side or on the side according to the installa tion environments 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...

Page 23: ...emove rubber cap inserted in the com mon pipe 2 Wrap the common pipe service valve with wet towel 3 Insert the pipe cap provided into the com mon pipe 4 Place high low pressure flare nut cap under the pipe cap so that the pipe cap does not move 5 Weld the pipe cap h If not wrapped with a wet towel there may be damages inside the valve h If the unit is operated without pipe cap work there may be ab...

Page 24: ... pipe Gas pipe Liquid pipe Gas pipe Remove only liquid gas pipe Knock Out Remove Base Pan Figure of Sides when drawing out through bottom pipe Pipe Drawing Out during Single connection 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 ...

Page 25: ...c 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 15mm Gas pipe and ...

Page 26: ...eve Heat insulating material Lagging Caulking material Band Waterproofing layer Sleeve with edge Lagging material Mortar or other incombustible caulking Incombustible heat insulation material When filling a gap with mortar cover the penetration part with steel plate so that the insulation material will not be caved in For this part use incombustible materials for both insulation and covering Vinyl...

Page 27: ...t perform the follow ing 1 Tape the pipe and connecting cable from down to up 2 Secure the taped pipe along the exterior wall Form a trap to prevent water entering the room 3 Fix the pipe onto the wall by saddle or equivalent Trap is required to prevent water from entering into electrical parts Taping Drain hose Pipings Connecting cable Power supply cord Seal a small Seal a small opening around op...

Page 28: ...nitrogen gas cylinder to this service port with charge hoses Pressurize the system to no more than 3 0 Mpa with dry nitrogen gas and close the cylinder valve when the gauge reading Reached 3 0 Mpa Next test for leaks with liquid soap 1 Do a leakage test of all joints of the tub ing both indoor and outdoor and both gas and liquid side service valves Bubbles indicate a leak Be sure to wipe off the s...

Page 29: ...stem of gas side valve counter clockwise to fully open the valve 3 Loosen the charge hose connected to the gas side service port slightly to release the pressure then remove the hose 4 Replace the flare nut and its bonnet on the gas side service port and fasten the flare nut securely with an adjustable wrench This process is very important to prevent leakage from the system 5 Replace the valve cap...

Page 30: ...ne are available follow the instruc tions below Do not connect wiring cable of different thicknesses to the power terminal block Slack in the power wiring cable may cause abnormal heat When connecting wiring which is the same thickness do as shown in the figure below For wiring use the designated power wiring cable and connect firmly then secure to pre vent outside pressure being exerted on the te...

Page 31: ...ble Between the indoor unit and the outdoor unit Remote wiring cable 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 that not to be pulled out easily Connect the wiring cables according to color codes by referring the wiring dia gram In Australia the length of power supply cable measured from the entry...

Page 32: ...cing of com munication and power wiring cable where these are to be run side by side Current capacity of power line Spacing 100V or more 10A 300mm 50A 500mm 100A 1000mm Exceed 100A 1500mm NOTE The figures are based on assumed length of parallel cabling up to 100m For length in excess of 100m the fig ures will have to be recalculated in direct proportion to the additional length of line involved If...

Page 33: ...the power supply If apparatus is not properly earthed then there is always a risk of electric shocks the earthing of the apparatus must be carried out by a qualified person CAUTION Some installation site may require attachment of an earth leakage breaker If no earth leakage breaker is installed it may cause an electric shock Do not use anything other than breaker and fuse with correct capacity Usi...

Page 34: ...electrical shock accident during cur rent leakage Communication disorder by noise effect and motor current leakage without connection to pipe Install the electronic wiring cable like Figure 1 Use a recognized circuit breaker between the power source and the Unit Capacity of circuit breaker recommended by authorized personnel only Install the main switch that can interrupt all the power sources in ...

Page 35: ...he wire by two clamps Remove the Front panel and the cover control by loosing screw Tighten a screw at two point as the right After connect the Outdoor PCB to the ODU dry contact with the cable provided arrange the wire by two clamps When connecting cable follow the Connection method below Refer to the ODU dry contact Installation manual CN_PWR CN_OUT CN41 GND 12V C 1 2 3 R S T N DRED Signal Recei...

Page 36: ...k Right Side Ground Cable Communication line Power Ground lines Over 50mm Gap Main Power Terminal Block Main Power Main Power Terminal Block Terminal Block Main Power Terminal Block Front Side 1 Communication line Power Ground lines Over 50mm Gap Main Power Main Power Terminal Block Terminal Block Main Power Terminal Block Ground Cable Front Side 2 Main Power Main Power Terminal Block Terminal Blo...

Page 37: ...nit side CAUTION Installation work must be performed in accordance with the national wiring standards by authorized personnel only Installations must comply with the applicable local national or international standards Apply totally enclosed noncombustible conduit metal raceway in case of local electric building code require plenum cable usage When installing the wired remote controller do not bur...

Page 38: ...installed in a place away from direct sunlight high humidity and direct supply of cold air to maintain proper space temperature Install the remote controller about 5ft 1 5m above the floor in an area with good air circulation at an average temperature Do not install the remote controller where it can be affected by Drafts or dead spots behind doors and in corners Hot or cold air from ducts Radiant...

Page 39: ...B Cooling Heating Indoor Outdoor Indoor Outdoor 60 Ø 3 380 415V ODU Ø 1 220 240V IDU High 7 5 m 27 19 35 24 20 15 7 6 Remote Controller Static Pressure E S P Standard value 1 High 2 Low S W Static Pressure Pa 60 80 100 120 140 160 180 Model Name Step Setting Value l s l s l s l s l s l s l s B70AWYN983 High 1167 78 82 86 90 93 96 99 Med 1084 75 79 83 87 91 94 97 Low 1000 71 75 79 83 87 91 95 SETTI...

Page 40: ...f you press the button the E S P value will be set CAUTION If you set E S P incorrectly the air conditioner may malfunction This setting must be carried out by authorized personnel only The E S P value is already appropriately set when manufactured from the factory it is recom mended that you do not change the E S P value 100 unit 10 unit Installer Setting E S P Function E S P function is setting ...

Page 41: ...cifi cation Particularly note the relation between cable length and thickness CAUTION Precaution in test running The initial power supply must provide at least 90 of the rated voltage Otherwise the air conditioner should not be operated To cancel the test run press any button Check the following tiems when installation is complete After completing work be sure to measure and record trial run prope...

Page 42: ...own Vibration of a magnetic switch dam age on the contact point there of fuse breaking disturbance to the nor mal function of a overload protection device Proper starting power is not given to the compressor HAND OVER Teach the customer the operation and mainte nance procedures using the operation manual air filter cleaning temperature control etc ...

Page 43: ...ature sensor of indoor unit is open or short 0 2 Inlet pipe temperature sensor of indoor unit Inlet pipe temperature sensor of indoor unit is open or short 0 3 Communication error wired remote controller indoor unit Failing to receive wired remote controller signal in indoor unit PCB 0 4 Drain pump Malfunction of drain pump 0 5 Communication error outdoor unit indoor unit Failing to receive outdoo...

Page 44: ...Inverter Compressor High Discharge Temperature 3 4 1 High Pressure of Outdoor Unit System is turned off by excessive increase of high pressure of Outdoor Unit 3 5 1 Low Pressure of Outdoor Unit System is turned off by excessive decrease of low pressure of Outdoor Unit 4 0 1 Outdoor Unit Inverter Compressor CT Sensor Fault Outdoor Unit Inverter Compressor CT Sensor open or short 4 1 1 Outdoor Unit ...

Page 45: ...nnection of R S T power of Outdoor Unit 5 7 1 Outdoor Unit Communication Error with Inverter Controller Outdoor Unit Controller part cannot receive invert er control signals usually happens after on board ing 6 0 1 Inverter PCB EEPROM Error of Outdoor Unit Access Error of Inverter PCB of Outdoor Unit 6 7 1 Outdoor Unit Fan Lock Restriction of Outdoor Unit 7 3 1 Instant Over Current Peak of Outdoor...

Page 46: ...an DC Link Input Voltage is under 380V 1 1 3 1 Outdoor Unit Liquid pipe Temperature Sensor Error Liquid pipe temperature sensor of Outdoor Unit is open or short 1 1 5 1 Outdoor Unit Subcooling Outlet Temperature Sensor Error Outdoor Unit Subcooling Outlet Temperature Sensor open or short 1 5 1 1 Failure of operation mode conver sion at Outdoor Unit Pressure unbalance between Outdoor Units 1 8 2 1 ...

Page 47: ...ommunic ation Off SW3 Group Control Selection of Master or Slave Master Slave Off SW4 Dry Contact Mode Selection of Dry Contact Mode Wired Wireless remote controller Selection of Manual or Auto operation Mode Auto Off SW5 Installation Fan continuous operation Continuous operation Removal Working Off Indoor Unit Factory Set All OFF Dip switch setting ...

Page 48: ...nabled only when Power is reset or by pressing Reset button Refer to the table that match dip switch of the product X mark within the table means that the dip switch must be pulled down If not the func tion may not work properly If the applicable dip switch is not set properly the product may not work properly CAUTION 7 Segment SW02V Auto Addressing SW01B SW02B ...

Page 49: ...nly AC 24V Connect CN DRY to dry contact controller Power supplier and dry contact controller are produced locally Tie the cables with the tie wraps and clamps Figure 2 Refer to dry contact installation manual for detailed installation method Dry contact Indoor PCB Control box Dry contact cover Control box cover C N I C C CN POWER CN DRY Screw INDOOR PCB DC DRY CONTACT Controller DC POWER SUPPLY A...

Page 50: ...stallation manual For detailed installation method USB connector USB wire harness WLAN Module Indoor PCB Control box Control box cover Ceiling Ceiling Roof H 200 or more Please check these out Install WLAN module in a space open on all sides Avoid installing it in a blind spot where the signal is weak or blocked Install the unit so that the LG logo in WLAN module face in the direction of Wi Fi wir...

Page 51: ...ntroller Check the slide switch position it should be located 1 position Refer to damper controller Installation manual for detailed installation metheod Damper controller Power Cable Actuator 1 Actuator 2 Indoor PCB Actuator 5 Actuator 4 Actuator 3 Actuator 6 Actuator 7 Actuator 8 Figure 1 Figure 2 CN PTC CN DAMPER NOTICE When install Damper Controller The Remote controller Should be matched as f...

Page 52: ...r removing the control box cover of the indoor unit remove the room temperature sensor in CN ROOM of the main PCB Insert the connector of remote sensor wire into CN ROOM Using the DC line hole when connecting the wire to Indoor PCB For using the two thermistor fuction the remote sensor should be installed from the wired remote controller as far as possible Refer to damper remote sensor manual for ...

Page 53: ... Figure 1 The thermistor mode is operated by the wired remote controller set as master Wired remote controller Indoor PCB Cable Wired remote controller Remote Controller Group Control S W GR 1 1 Master 2 Slave 2 Two wired remote controllers should be same model name otherwise it can cause unex pected problems For example Using PQRCVSLOQW with PQRCVSLOQW is proper Using PDRCUDC0 with PDRCUDC0 is pr...

Page 54: ......

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