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• 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 www.lg.com P/NO : MFL41755813...
TABLE OF CONTENTS TABLE OF CONTENTS INTRODUCTION WIRING Tips for saving energy Electrical Wiring Important safety instructions Precautions when laying power wiring cable Installation process Indoor unit wiring Features Outdoor unit wiring Environment-friendly alternative refrigerant R-410A Communication and Power wiring cable Wiring of main power supply and INSTALLATION PLACE equipment capacity...
INTRODUCTION INTRODUCTION Tips for saving energy Here are some tips that will help you minimize the power consumption when you use the air conditioner. You can use your air conditioner more efficiently by referring to the instructions below: • Do not cool excessively indoors. This may be harmful for your health and may consume more electricity.
INTRODUCTION Important safety instructions READ ALL INSTRUCTIONS BEFORE USING THE APPLIANCE. Always comply with the following precautions to avoid dangerous situations and ensure peak performance of your product WARNING It can result in serious injury or death when the directions are ignored CAUTION It can result in minor injury or product damage when the directions are ignored WARNING...
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INTRODUCTION • Be sure the installation area does not deteriorate with age. - If the base collapses, the air conditioner could fall with it, causing property damage, product failure, and personal injury. • Use a vacuum pump or Inert (nitrogen) gas when doing leakage test or air purge. Do not compress air or Oxygen and do not use Flammable gases.
INTRODUCTION 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 drainage pipe...
INTRODUCTION Environment-friendly alternative refrigerant R-410A CAUTION - The refrigerant R-410A has the property of higher operating pressure in comparison with • The wall thickness of the pipe should R22. comply with the relevant local and na- tional regulations for the designed pres- Therefore, all materials have the characteris- sure 3.8MPa tics of higher resisting pressure than R22...
INSTALLATION PLACE INSTALLATION PLACE Select space for installing outdoor unit, which - If installation site is area of heavy snowfall, will meet the following conditions: then the following directions should be observed. - No direct thermal radiation from other heat •...
INSTALLATION PLACE Indoor unit installation place - The place shall easily bear a load exceeding four times the indoor unit’s weight. - The place shall be able to inspect the unit. - The place where the unit shall be leveled. - The place shall allow easy water drainage.
INSTALLATION PLACE Outdoor unit installation place - If an awning is built over the unit to prevent direct sunlight or rain exposure, make sure that heat radiation from the condenser is not restricted. - Ensure that the spaces indicated by arrows around front, back and side of the unit. - Do not place animals and plants in the path of the warm air.
INSTALLATION PLACE Installation guide at the seaside In case, to install the outdoor unit on the CAUTION seaside, set up a windbreak not to be exposed to the sea wind. • Air conditioners should not be installed in areas where corrosive gases, such as acid or alkaline gas, are produced.
PRODUCT INSTALLATION PRODUCT INSTALLATION Indoor unit installation Case1 Case2 Position of suspension Bolt Position of Console Bolt - Apply a joint-canvas between the unit and - A place where the unit will be leveled and duct to absorb unnecessary vibration. that can support the weight of the unit.
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PRODUCT INSTALLATION - Insert the set anchor and washer onto the Ceiling suspension bolts for locking the suspension bolts on the ceiling. - Mount the suspension bolts to the set anchor firmly. - Secure the installation plates onto the sus- Drainage hole pension bolts (adjust level roughly) using nuts, washers and spring washers.
PRODUCT INSTALLATION Separating work of the indoor unit (if required) To install the indoor unit, it can be easily sepa- rated into 2 sections by making it lighter to carry and easier to maneuver through open- ings and in the ceiling. CAUTION Please separate the indoor unit only when necessary.
PRODUCT INSTALLATION ⑤ Re-connect the unplugged cables. The method to rejoin the indoor unit Reassemble the control box cover. is as follows. ① Sub drain pan and the fan deck section to- gether with the 5 screws. ⑥ Carefully replace the fan deck section top cover and secure the cover with the screws.
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PRODUCT INSTALLATION Caution for gradient of unit and Safety drainage drainage pipe - There is no need to provide a trap for the safety drainage. If the safety drainage pipe is Lay the drainage pipe hose with a downward connected to the main drainage pipe, make inclination so water will drain out.
PRODUCT INSTALLATION Lifting method of the outdoor unit - When carrying the suspended, unit pass the CAUTION ropes under the unit and use the two sus- pension points each at the front and rear. Be very careful while carrying the prod- - Always lift the unit with ropes attached at uct.
PRODUCT INSTALLATION The outdoor unit installation The location of the Anchor bolts for outdoor unit - Install at places where it can endure the weight and vibration/noise of the outdoor Unit : mm unit. - The outdoor unit supports at the bottom shall have width of at least 100mm under the Unit’s legs before being fixed.
PRODUCT INSTALLATION Foundation for outdoor unit 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.
PIPE CONNECTION PIPE CONNECTION Pipe length and the elevation Pipe Size *Additional Length A(m) Elevation B(m) Capacity mm(inch) refriger- (Btu/h) ant(g/m) Liquid Standard Max. Standard Max. 22.2(7/8) 9.52(3/8) Outdoor unit Indoor unit Outdoor unit Indoor unit CAUTION • The standard pipe length is 7.5m. If the pipe length exceeds 7.5m, Need to additional charge of the refrigerant which according to the table.
PIPE CONNECTION Preparation of Pipe Welding - Pipe connections can be done on the front Main cause of gas leakage is defect in flaring side or on the side according to the installa- work. Carry out correct flaring work in the fol- tion environments.
PIPE CONNECTION Preparation Work for piping Method of pipe cap work during the installa- tion of single outdoor unit - Use Knock Outs of Base Pan of the outdoor 1. Remove rubber cap inserted in the com- unit for Left/Right or Bottom pipe drawing mon pipe.
PIPE CONNECTION 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. Liquid pipe Pipe Knock Out for Liquid/Gas pipes Gas pipe Method of drawing out pipes on the bottom side...
PIPE CONNECTION Thermal insulation of refrigerant pipe Be sure to give insulation work to refrigerant pipe 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. When insula- tion work is insufficient, there is a possibility of condensation drip, etc.
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PIPE CONNECTION Penetrations Sleeve Outer wall Outer wall (exposed) Inner wall (concealed) Heat insulating material Lagging Caulking material Band Waterproofing layer Sleeve with edge Penetrating portion on fire Lagging material limit and boundary wall Floor (fireproofing) Roof pipe shaft Mortar or other incombustible caulking Incombustible heat insulation material When filling a gap with mortar, cover the penetration part with steel plate so that...
PIPE CONNECTION Forming the pipe Form the pipe by wrapping the connecting In cases where the Outdoor unit is installed portion of the indoor unit with insulation above the Indoor unit perform the follow- material and secure it with two kinds of ing.
PIPE CONNECTION Leakage test and evacuation CAUTION Air and moisture remaining in the refrigerant system have undesirable effects as indicated To avoid nitrogen entering the refrigerant below. system in a liquid state, the top of the cylinder must be higher than its bottom - Pressure in the system rises.
PIPE CONNECTION Vacuum Indoor unit Connect the charge hose end described in the preceding steps to the vacuum pump to evacuate the pipe and indoor unit. Confirm the "Lo and Hi" knob of the mani- fold valve is open. Then, run the vacuum pump.
WIRING WIRING Electrical Wiring Precautions when laying power wiring cable - Follow ordinance of your governmental organization for technical standard related to Use round pressure terminals for connections electrical equipment, wiring regulations and to the power terminal block. guidance of each electric power company. Power wiring cable Round pressure terminal WARNING...
WIRING Indoor unit CAUTION - Remove the control box cover for electrical • The circuit diagram is not subject to wiring between the indoor and outdoor unit. change without notice. - Use the cord clamper to fix the wiring cable. •...
WIRING Communication and Power NOTE wiring cable • The figures are based on assumed length of parallel cabling up to 100m. 1) Communication wiring cable For length in excess of 100m the fig- ures will have to be recalculated in - Types : shielding wire direct proportion to the additional length - Cross section : 1.0~1.5mm...
WIRING CAUTION CAUTION • If apparatus is not properly earthed then • Some installation site may require there is always a risk of electric shocks, attachment of an earth leakage breaker. the earthing of the apparatus must be If no earth leakage breaker is installed, it carried out by a qualified person.
WIRING Field Wiring u Example Connection of Communication wiring cable Indoor Unit 50Hz, 1Ø, 220-240V Outdoor Unit 50Hz, 3Ø, 380-415V Power supply Circuit Breaker 3Phase 4Wires [Outdoor Unit] 50Hz 380-415V (Main Switch) R S T N Switch Power supply 1 Phase 50Hz Fuse 220-240V Circuit...
WIRING Connecting the DRED to the outdoor unit - 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.
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WIRING u Outdoor Unit Wiring 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/Ground lines Power/Ground lines Ground Cable Ground Cable...
WIRING Wired remote controller installation 1 Put the installation paper on the place and determine the position and height of the fixing screws of the deluxe wired remote controller. Yellow - Refer to the printed side of the installation paper. The position of the fixing screws 2 Please connect indoor unit and remote controller using connec-...
Yellow WIRING 3 Remove the installation paper before Fixing the Fixing the installing the remote controller so that it remote controller connecting cable can fit into the right place. Supply the power after connecting deluxe wired remote controller. When you need to change wired remote controller, turn off the main power and change it before turn on the main power.
SETTING & TEST SETTING & TEST Static Pressure(Pa) Model Name Step Setting Value High 1167 B70AWYN983 1084 1000 NOTE Capacities are tested in the following conditions. Temperature (°C DB/°C WB) Static Air Flow Piping Pressure Voltage (Phase/Volt) Cooling Heating Step Length (Pa) Indoor...
SETTING & TEST Installer Setting - E.S.P Function E.S.P function is setting the volume of each air flow. It is for the convenience of installation. It is recommended that you should not use this function while using the wireless remote controller. CAUTION If you set E.S.P incorrectly, the air conditioner may malfunction.
SETTING & TEST Precaution in test running Connection of power wiring cable - The initial power supply must provide at least 90% of the rated voltage. Connect the power wiring cable to the Otherwise, the air conditioner should not be independent power supply.
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SETTING & TEST 8) Never fail to equip a leakage breaker where it is wet or moist. 9) The following troubles would be caused by voltage drop-down. - 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.
SETTING & TEST Self-diagnosis function Error Indicator • This function indicates types of failure in self-diagnosis and occurrence of failure for air condi- tion. • 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.
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SETTING & TEST Display Title Cause of Error Outdoor Unit Inverter Compressor DC charging is not performed at Outdoor Unit DC link Low Voltage after starting relay turn on. System is turned off by Outdoor Unit high pres- Outdoor Unit High Pressure Switch sure switch.
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SETTING & TEST Display Title Cause of Error Outdoor Unit Faulty IPM Outdoor Unit IPM Temperature Sensor Temperature Sensor short/open Omitting connection of R, S, T Omitting connection of outdoor unit power of Outdoor Unit Transmission error : inverter PCB ’ Failing to receive inverter signal at main PCB of Main PCB Outdoor Unit...
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SETTING & TEST Display Title Cause of Error Communication Fail Between Outdoor Unit Outdoor Unit Main PCB EEPROM Main MICOM and EEPROM or omitting EEP- Error Outdoor Unit Fan PCB EEPROM Communication Fail Between Outdoor Unit Fan Error MICOM and EEPROM or omitting EEPROM Outdoor Unit Fan PCB Failing to receive fan signal at main PCB of unit.
SETTING & TEST Dip switch setting Indoor Unit ▲ Factory Set : All OFF Function Description Setting Off Setting On Default Communication Between Communication Communication Communic Indoor & Outdoor ation Selection of Master or Group Control Master Slave Slave Wired/Wireless remote Dry Contact Selection of Dry Contact controller...
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SETTING & TEST Outdoor Unit • If you set the Dip switch when power is on, the changed setting will not be applied immediate- ly. The changed setting will be enabled only when Power is reset or by pressing Reset button. SW01B SW02B 7 - Segment...
ACCESSORY GUIDE ACCESSORY GUIDE (PQDSB1) Dry Contact(Only AC 24V) - Fix dry contact on the indoor control box Indoor PCB cover. Control box - Connect dry contact(CN-CC) to Indoor PCB(CN-CC) with cable. - Use the DC line hole when connecting the cable to indoor PCB.(Figure 2).
- 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 wireless router installed.
ACCESSORY GUIDE Damper Controller(PBZC80) - Open the cover of indoor unit control box and damper controller(Figure 1) - Assemble the damper controller on the cover which is seperated. - Connect the lead wires between main PCB and damper controller.(Figure 2) - Connect the main power cable and actuator cable to damper controller.(Figure 2) - Assemble the damper controller to indoor unit and then assemble cover of damper controller.
ACCESSORY GUIDE Remote Temperature Sensor(PQRSTA0) - After deciding where the remote temperature sensor is installed, decide the location and height of the fixing screws. (Interval between the screws : 60mm). Fixing - After removing the control box cover of the indoor unit, 60mm screws remove the room temperature sensor in CN-ROOM of the main PCB.
ACCESSORY GUIDE Two wired remote controller - All wired remote controllers are displayed on identical information. - Last used wired romote controller has priority on product's movement. - Set one wired remote controller as master,the others as slave.<Figure 1> - The thermistor mode is operated by the wired remote controller set as "master" Wired remote controller Indoor...