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Installation Manual

15

ENGLISH

WARNING : Loose wiring may
cause the terminal to overheat
or result in unit malfunction.
A fire hazzard may also exist.
Therefore, be sure all wiring is
tightly connected.

Wiring Connection

• Remove the control box cover for electrical connection between the indoor and outdoor unit.

(Remove screws

➀

.)

• Use the cord clamper to fix the cord.

Remote

controller

cord

Control box cover
(On which the Electric
Wiring Connection is put)

Connection cord
between the indoor unit
and the outdoor unit

1

1

Wiring Connection

Connecting cables to the Indoor Unit

Electrical Wiring

Outdoor

Indoor

Main

power source

Switch box

ELCB

Perform the electrical wiring work according to the electrical wiring connection.

• All wiring must comply with local requirements.
• Select a power source that is capable of

supplying the current required by the air
conditioner.

• Use a recognized ELCB(Electric Leakage

Circuit Breaker) between the power source and
the unit. A disconnection device to adequately
disconnect all supply lines must be fitted.

• Model of circuit breaker recommended by

authorized personnel only

Model

Phase(Ø)

ELCB

42k Btu/h

1

40A

1. Cassette type

Lock nut

Conduit
mounting
plate

Conduit

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Summary of Contents for MFL40910614

Page 1: ... com 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 ...

Page 2: ...roperly insulate any tubing run inside a room to prevent sweating that can cause dripping and water damage to wall and floors in moist or uneven locatinons Use a raised concrete pad or concrete blocks provide a solid level foundation for the outdoor unit This prevents water damage and abnormal vibration in an area with high winds Securely anchor the outdoor unit down with bolts and a metal frame P...

Page 3: ...ation of Indoor Outdoor Unit 7 The indoor unit installation 9 Remote controller installation 12 Wiring Connection 15 Flaring Work and Connection of Piping 19 Leakage test and Evacuation 23 Installation of Decorative Panel 25 Indoor Unit Drain Piping 27 Test running 30 Installation Guide at the Seaside 33 ...

Page 4: ...ug or a loose socket which is damaged Otherwise it may cause a fire or electrical shock For installation of the product always contact the service center or a professional installation agency Otherwise it may cause a fire electrical shock explosion or injury Securely attach the electrical part cover to the indoor unit and the service panel to the outdoor unit If the electrical part cover of the in...

Page 5: ... and may cause injury Do not share the outlet with other appliances It will cause an electric shock or a fire due to heat generation Do not use the damaged power cord Otherwise it may cause a fire or electrical shock Do not modify or extend the power cord randomly Otherwise it may cause a fire or electrical shock Take care so that the power cord may not be pulled during operation Otherwise it may ...

Page 6: ...p level parallel in installing the product Otherwise it may cause vibration or water leakage Avoid excessive cooling and perform ventilation sometimes Otherwise it may do harm to your health Use a soft cloth to clean Do not use wax thinner or a strong detergent The appearance of the air conditioner may deteriorate change color or develop surface flaws Do not use an appliance for special purposes s...

Page 7: ...ding type There should not be any heat source or steam near the unit There should not be any obstacles to prevent the air circulation A place where air circulation in the room will be good A place where drainage can be easily obtained A place where noise prevention is taken into consideration Do not install the unit near the door way Ensure the spaces indicated by arrows from the wall ceiling or o...

Page 8: ...wning 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 Take the air conditioner weight into account and select a place where noise and vibration are minimum Select a place s...

Page 9: ...ace Ensure enough distance from the cooking room to install the air conditioner in such a place where it may not suck oily steam 2 Avoid installng air conditioner in such places where cooking oil or iron powder is generated 3 Avoid places where inflammable gas is generated 4 Avoid place where noxious gas is generated 5 Avoid places near high frequency generators NOTICE Select and mark the position...

Page 10: ...er model Flat washer for M10 accessory Hanging bolt W3 8 or M10 Nut W3 8 or M10 Nut W3 8 or M10 Spring washer M10 Air Conditioner body Keep the length of 15 18mm 5 8 3 4 inch between the air conditioner bottom surface and the ceiling surface The following parts is option Hanging Bolt W 3 8 or M10 Nut W 3 8 or M10 Spring Washer M10 Plate Washer M10 Drill the piping hole on the wall slightly tilted ...

Page 11: ...be Bushing INSIDE OUTSIDE 1 The mounting floor should be strong and solid enough to prevent it from vibration 2 Drill the piping hole with 70mm diameter hole core drill at either the right or the left of indoor unit The hole should be sightly slant to the outdoor side 3 Insert the plastic tube through the hole 4 Cut the extruded outside part of the plastic tube if necessary Unit mm inch ...

Page 12: ...7 09 11 13 15 17 19 21 23 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 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 remot...

Page 13: ...it the buried box Use the screw provided 4 After fixing the top part of the wired remote controller to the installation board as shown in beside picture press the bottom part to assemble the controller to it s board When disassemble the wired remote controller from the installation board use the driver as shown in the right picture and insert it into the hole with the arrow And when you pull the d...

Page 14: ... Use the connecting cable to connect the indoor unit and the wired remote controller 6 When the distance between the wired remote controller and the indoor unit is 10m and above use the extension cable CAUTION When installing the wired remote controller do not bury it in the wall It can cause damage in the temperature sensor Do not install the cable to be 50m or above It can cause communication er...

Page 15: ...e outdoor unit 1 1 Wiring Connection Connecting cables to the Indoor Unit Electrical Wiring Outdoor Indoor Main power source Switch box ELCB Perform the electrical wiring work according to the electrical wiring connection All wiring must comply with local requirements Select a power source that is capable of supplying the current required by the air conditioner Use a recognized ELCB Electric Leaka...

Page 16: ... Front Door Manually as shown in Fig 1 2 Open the Control Box Cover A with Driver as shown in Fig 2 3 Connect the Cables LG doesn t supply to the terminal Block of Indoor Unit as shown in Fig 3 4 Install a power supply line or connecting cables as the Fig 4 in order to prevent the connecting wires from being cut by sharp edge of the hole 5 Secure the Control Box Cover A to its original position wi...

Page 17: ... wiring may cause abnormal heat When connecting wiring which is the same thickness do as shown in the figure below Connecting Cables between Indoor Unit and Outdoor Unit WARNING Make sure that the screws of the terminal are free from looseness Round pressure terminal Power wire RECOMMENDATION The power cord connected to the outdoor unit should be comply with the following specifications ETL recogn...

Page 18: ...er connecting main Power cable Connecting cable terminal Power cord terminal Cord clamp Cord clamp Remove the side panel for wiring connection Use the cord clamp to fix the cord Earthing work Case 1 Terminal block of Outdoor Unit have mark Connect the cable of diameter 1 6mm2 or more to the earthing terminal provided in the control box and do earthing Case 2 Terminal block of Outdoor Unit don t ha...

Page 19: ... on Remove flare nuts attached to indoor and outdoor units than put them on pipe tube having completed burr removal Not possible to put them on after flaring work 4 Flaring work Carry out flaring work using flaring tool as shown below Firmly hold copper tube in a bar or die as indicated dimension in the table above 5 Check Compare the flared work with figure If flare is noted to be defective cut o...

Page 20: ...with a wrench When extending the drain hose at the indoor unit install the drain pipe Indoor unit tubing Flare nut Pipings Torque wrench Indoor unit tubing Spanner fixed Connection pipe Flare nut mm inch kgf m lbf ft Ø6 35 1 4 1 8 2 5 13 18 Ø9 52 3 8 3 4 4 2 24 30 Ø12 7 1 2 5 5 6 6 40 48 Ø15 88 5 8 6 3 8 2 46 59 Ø19 05 3 4 9 9 12 1 72 88 Outside diameter Torque Vinyl tape narrow Adhesive Drain pip...

Page 21: ...ng foreign objects from entering Fig 3 Plug the pipe through holes with putty or insulation material procured locally to stop up all gaps as shown in the Fig 3 Insects or small animals entering the outdoor unit may cause a short circuit in the electrical box Knock out Base pan Forward Sideways Backward Downward Gas side piping Bigger Dia Liquid side piping Smaller Dia Drain hose Connecting wire Co...

Page 22: ... drain outlet should be routed above the ground Secure the drain hose appropriately In cases where the outdoor unit is installed below the indoor unit perform the following 1 Tape the piping drain hose and connecting cable from down to up 2 Secure the tapped piping along the exterior wall using saddle or equivalent In cases where the Outdoor unit is installed above the Indoor unit perform the foll...

Page 23: ...y nitrogen gas cylinder to this service port with charge hoses CAUTION Be sure to use a manifold valve for leakage test If it is not available use a stop valve for this purpose The Hi knob of the manifold valve must always be kept close 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 li...

Page 24: ...lve 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...

Page 25: ...ner covers of the panel 3 Fit the panel on the unit by inserting hooks as shown in picture 4 Insert two screws on diagonal corners of panel Do not tighten the bolts completely The fixing screws are included in the indoor unit box Check the alignment of panel with the ceiling Height can be adjusted using hanging bolts as shown in picture Insert the other two screws and tighten all screws completely...

Page 26: ...LAY Vane control connector CN VANE 1 2 8 Close the cover for control box 9 Install the air inlet grille and Filter on the panel Screw CN VANE 1 2 CN DISPLAY CAUTION Install certainly the decorative panel Cool air leakage causes sweating Water drops fall Air conditioner unit Ceiling board Decorative panel Decorative panel Fit the insulator this part and be careful for cool air leakage Good example ...

Page 27: ...in connection on the indoor unit is 32mm 1 1 4 inch Be sure to install heat insulation on the drain piping Piping material Polyvinyl chloride pipe inner diometes Ø 25mm 1 inch and pipe fittings Heat insulation material Polyethylene foam with thickness more than 8mm 5 16 inch Maintenance drain port Upward routing not allowed Pipe clamp Indoor unit 1 50 1 100 MAX 700 mm 27 9 16 inch How to use the f...

Page 28: ...e drain hose accessory Main drain pipe Glue the joint Drain port Drain hose connection Use the clip accessory 1 50 1 100 Flexible drain hose Flexible drain hose 1 Use the heat insulation material for the refrigerant piping which has an excellent heat resistance over 120 C 248 F 2 Precautions in high humidity circumstance This air conditioner has been tested according to the KS Standard Conditions ...

Page 29: ...100 inclination Prevent any upward flow or reverse flow in any part 3 5mm 3 16 inch or thicker formed thermal insulator is provided for the drain pipe 4 Upward routing is not allowed 5 Be sure to check the drain pump for normal operation and abnormal noise when electrical wiring is complete 1 50 1 100 MAX 800mm 32 1 2 inch Elbow Drain pump Unit Drain pipe Local supply Thermal insulator Local suppl...

Page 30: ...rature wind velocity wind volume voltage current presence of abnormal vibration and noise operating pressure piping temperature compressive pressure As to the structure and appearance check following items 2 Connection of power supply 1 Connect the power supply cord to the independent power supply Circuit breaker is required 2 Operate the unit for fifteen minutes or more 3 Evaluation of the perfor...

Page 31: ...st Run Mode 18 C cooling High Fan Speed Airflow direction mode will be operated during 18 minutes with ignoring room temperature After running 18 minutes under test run mode system will automatically turn OFF In case of duct type the Airflow UP DOWN function is not displayed During test run mode receiving signal from wireless remote controller will release this operation If you press any kind of b...

Page 32: ...o 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 to equip a...

Page 33: ...ide 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 Selecting the location Outdoor Unit 1 If the outdoor unit is to be installed close to the seaside direct exposure to the sea wind should be avoided Install the outdoor unit on t...

Page 34: ...34 Air Conditioner ...

Page 35: ...P No MFL40910614 specifications designs and other content presented in this manual are current as of September 2007 but subject to change without notice Printed in Korea Oct 2008 ...

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