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LG
Air Conditioner
INSTALLATION MANUAL
Type : Ceiling Concealed Duct
IMPORTANT
• 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.
LG
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Table of Contents
Related Manuals for LG B42AWYU362
Summary of Contents for LG B42AWYU362
- Page 1 Air Conditioner INSTALLATION MANUAL Type : Ceiling Concealed Duct IMPORTANT • 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.
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Page 2: Table Of Contents
Ceiling Concealded Duct Air Conditioner Installation Manual TABLE OF CONTENTS Installation Required Parts Required Tools Requirements Safety Precautions ....3 Introduction ......6 Installation of Indoor, • Four Type “A” screws • Level Outdoor Unit ......7 • Connecting cable • Screw driver •... -
Page 3: Safety Precautions
Safety Precautions Safety Precautions To prevent the injury of the user or other people and property damage, the following instructions must be followed. I Be sure to read before installing the air conditioner. I Be sure to observe the cautions specified here as they include important items related to safety. I Incorrect operation due to ignoring instruction will cause harm or damage. - Page 4 Safety Precautions For installation, always contact the dealer or Do not install the product on a Be sure the installation area an Authorized Service Center. defective installation stand. does not deteriorate with age. • There is risk of fire, electric •...
- Page 5 Safety Precautions I Installation Always check for gas (refrigerant) Install the drain hose to Keep level even when leakage after installation or repair ensure that water is drained installing the product. of product. away properly. • Low refrigerant levels may cause •...
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Page 6: Introduction
Installation Parts Provided Introduction Features Air outlet vents Air intake vents Remote Controller (Side) (Rear) Air intake vents Air outlet vents Control over Connecting wire Piping rain hose Connecting wire Connection pipe Drain hose 6 Ceiling Concealed Duct Air Conditioner... -
Page 7: Installation Of Indoor, Outdoor Unit
Installation of Indoor, Outdoor Unit Installation of Indoor, Outdoor Unit Selection of the best location Indoor unit Install the air conditioner in the location that Top view Inspection hole satisfies the following conditions. (unit: mm) (450 x 450) • The place shall easily bear a load exceeding Control box four times the indoor unit’s weight. - Page 8 Installation of Indoor, Outdoor Unit Piping length and the elevation Pipe Size Length A(m) Elevation B(m) Capacity *Additional mm(inch) (Btu/h) refrigerant(g/m) Liquid Standard Max. Standard Max. 42 k 15.88(5/8) 9.52(3/8) 48 k 15.88(5/8) 9.52(3/8) 55 k 15.88(5/8) 9.52(3/8) Outdoor unit Outdoor unit Indoor unit Oil trap...
- Page 9 Installation of Indoor, Outdoor Unit Indoor unit installation I Installation of Unit Install the unit above the ceiling correctly. CASE 1 POSITION OF SUSPENSION BOLT • Apply a joint-canvas between the unit and duct to absorb unnecessary vibration. • Apply a filter Accessory at air return hole. (Unit:mm) Dimension A B C D E F G H...
- Page 10 Installation of Indoor, Outdoor Unit CAUTION 1. Install declination of the indoor unit is very important for the drain of the duct type air conditioner. 2. Minimum thickness of the insulation for the connecting pipe shall be 10mm. • The unit must be declined to the drain hose connected when finished installation. Ceiling CORRECT INCORRECT...
- Page 11 Installation of Indoor, Outdoor Unit • Drill the piping hole with 70mm dia, hole core WALL Indoor Outdoor drill. • Piping hole should be slightly slant to the outdoor side. 5~7mm INSULATION, OTHERS Insulate the joint and tubes completely. THERMAL INSULATION All thermal insulation must comply with local requirement.
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Page 12: Connecting Cable
Installation of Indoor, Outdoor Unit Install the remote control box and INSTALLATION OF REMOTE CONTROL BOX cord correctly. POINT OF REMOTE CONTROLLER INSTALLATION • Although the room temperature sensor is in the indoor unit, the remote control box should be installed in such places away from direct sunlight and high humidity. INSTALLATION OF THE REMOTE CONTROL BOX ROUTING OF THE REMOTE CONTROL CORD •... - Page 13 Installation of Indoor, Outdoor Unit WIRED REMOTE CONTROLLER INSTALLATION • Since the room temperature sensor is in the remote controller, the remote controller box should be installed in a place away from direct sunlight, high humidity and direct supply of cold air to maintain proper space temperature.
- Page 14 Installation of Indoor, Outdoor Unit Perform the work according to the Service Manual or REFRIGERANT PIPING Installation Guide. • Use two spanners when connecting the refrigerant pipe to the unit. Flared connection (Union) • Make a bend with a radius as large as possible.
- Page 15 Installation of Indoor, Outdoor Unit Perform the electrical wiring work according to the ELECTRICAL WIRING electrical wiring connection. • All wiring must comply with local Circuit Breaker requirements. Main power source • Select a power source that is capable of Switch box supplying the current required by the air conditioner.
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Page 16: Connecting Pipes To The Indoor Unit
Connecting Pipes to the Indoor Unit Connecting Pipes to the Indoor Unit Preparation of Piping Main cause of gas leakage is defect in flaring work. Carry out correct flaring work in the Copper Slanted Uneven Rough tube following procedure. 90° Cutting Tubes •... - Page 17 Connecting Pipes to the Indoor Unit Pipe bending Annealed copper pipe with small diameter (ø6.35 or ø9.52) can be easily bent manually. In this case, secure large R(radius) for the bend section and gradually bend pipe. If annealed copper pipe is large in diameter (ø15.88 or ø19.05), bend pipe with bender.
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Page 18: Pipes: Gas Side
Connecting Pipes to the Outdoor Unit Connecting Pipes to the Outdoor Unit Connecting the pipes to the Outdoor unit • Align the center of the pipings and sufficiently Continuous tighten the flare nut with fingers. • Finally, tighten the flare nut with torque wrench until the wrench clicks. -
Page 19: Checking The Drainage
Connecting Cables between Indoor Unit and Outdoor Unit Checking the Drainage Checking the Drainage • Check the drainage. - Spray one or two glasses of water upon the evaporator. - Ensure that water flows drain hose of indoor unit without any leakage. Connecting Cables between Indoor Unit and Outdoor Unit Connecting cables to the Indoor Unit I Connect the wires to the terminals on the control board individually according to the outdoor unit connection. - Page 20 Connecting Cables between Indoor Unit and Outdoor Unit Connecting the cable to the Outdoor Unit • Remove the side panel from the unit by loosing screws. Connect the wires to the terminals on the control board individually as previous page. •...
- Page 21 opening around the pipings with gum type sealer. Connecting Cables between Indoor Unit and Outdoor Unit Forming the piping Form the piping by wrapping the Seal a small Seal a small opening around opening around connecting portion of the indoor the pipings with the pipings with unit with insulation material and...
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Page 22: Air Purging And Evacuation
Air Purging and Evacuation Air Purging and Evacuation Air and moisture remaining in the refrigerant system have undesirable effects as indicated below. 1. Pressure in the system rises. 2. Operating current rises. 3. Cooling(or heating) efficiency drops. 4. Moisture in the refrigerant circuit may freeze and block capillary tubing. 5. - Page 23 Air Purging and Evacuation Soap water method Outdoor unit 1. Remove the caps from 3-way valves. Gas side 2. Remove the service-port cap from the 3-way valve. 3-way valve (Close) 3. To open the liquid side 3-way valve turn the valve Liquid side stem counterclockwise approximately 90°, wait for Gas side...
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Page 24: Group Control
Group Control Group Control It operates maximum 16 units by only one wired remote controller, and each unit starts sequentially to prevent overcurrent. Main PCB Indoor Unit 1 Indoor Unit 2 Indoor Unit 16 Terminal(Local Supply) Terminal(Local Supply) Terminal(Local Supply) Block Block Block... -
Page 25: Continuous Fan Operation
Continuous Fan Operation Continuous Fan Operation When need to set up the continuous fan operation, chage the option switch 4 in the PCB as below guide line. Option Switch Option Switch 4 Function Continuous Fan Operation - ON Continuous Fan Indoor PCB Indoor PCB Indoor PCB... -
Page 26: External Static Pressure & Air Flow
External Static Pressure & air Flow External Static Pressure & air Flow External Static Pressure (Pa) Capacity(Btu/h) step(HI/Med/Low) Setting Remote Cotroller's Switch2 Setting RPM Hi (48 CMM) 42 k Med (42 CMM) Low E.S.P Mode High E.S.P Mode Low (36 CMM) Hi (60 CMM) 48 k Med (50 CMM) - Page 27 Accessory Installation Guide Accessory Installation Guide Dry Contact(Only AC 24V) • Fix dry contact on the indoor control box cover. Indoor PCB • Connect dry contact(CN-CC) to Indoor PCB(CN-CC) with Control box cable provided. • Use the DC line hole when connecting the cable to indoor PCB.(Figure 2).
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Page 28: Accessory Installation Guide
Accessory Installation Guide PI485 • Fix PI485 to the bracket in the outdoor control box.(Figure 2) • Connect PI485 to outdoor PCB and central controller with cable.(Figure 1,3) - Connect CN-PWR to WCN_P(N) and WCN_P(L). - Connect CN-OUT to CN_CENTRAL. •... - Page 29 Accessory Installation Guide RF Remote Controller • Connect Indoor PCB(CN-DISPLAY) to RF Double remote controller with the cable provided. coated Indoor PCB tape RF remote • Use the DC line hole when connecting the controller Control box cable to Indoor PCB. •...
- Page 30 Accessory Installation Guide Damper Controller • Open the cover of indoor unit control box and damper controller(Figure 1) • Assemble the damper controller to cover which is seperated. • Connect the lead wires between main PCB and damper controller.(Figure 2) •...
- Page 31 Accessory Installation Guide Remote Temperature Sensor • After deciding where the remote temperature sensor is installed, decide the location and height of the fixing screws. (Interval between the screws : 60mm). Fixing screws 60mm • After removing the control box cover of the indoor unit, remove the room temperature sensor in CN-ROOM of the main PCB.
- Page 32 Accessory Installation 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> •...
- Page 33 Accessory Installation Guide Simple Contact • It can be used to turn the unit On/Off after getting the signal from external sources like timer, key-in lock etc. • This function is similar to the dry contact, but need to no additional accessory. •...
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Page 34: 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 35 P/No.: MFL62541002...