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FLARING WORK AND CONNECTION OF PIPING

Capacity

(Btu/h)

Pipe Size[Torque]

GAS

LIQUID

9K, 12K

18K, 24K, 26K

.

.

1/2"[5 5kg m]

.

.

5/8"[6 6kg m]

.

.

1/4"[1 8kg m]

.

.

3/8"[4 2kg m]

Bundle the piping and drain hose together by
wrapping them with cloth tape over the range
within which they fit into the rear piping housing
section.

Drain hose

Pipe

 Vinyl tape(narrow)

H

Reroute the pipings and the drain hose across
the back of the chassis.

Wrap with
vinyl tape(wide)

I

Set the pipings and the drain hose to the back of
the chassis with the tubing holder.

Hook the edge of tubing holder to tap on chassis
and push the bottom of tubing holder to be
engaged at the bottom of chassis.

J

Indoor unit installation

Remove the spacer.
Ensure that the hooks are properly seated on the
installation plate by moving it left and right.

Press the lower left and right sides of the unit against
the installation plate until the hooks engage into their
slots(clicking sound).

Connection of the

pipes-Outdoor

When tightening the flare nut with torque
wrench, ensure the direction for tightening
follows the arrow on the wrench.

A

Align the center of the pipings and
sufficiently tighten the flare nut by hand.

B

Finally, tighten the flare nut with torque
wrench until the wrench clicks.

Tubing holder

Hook

Push

Drain hose

Connecting

cable

Outdoor unit 

Gas side piping
(Bigger diameter)

Liquid side
piping
(Smaller
diameter)

Torque wrench

2

1

Piping for
passage through
piping hole

INSTALLATION

14

Содержание MFL39754838

Страница 1: ...x 0120 2560957 www lg com Please read this installation manual completely before installing the product When the power cord is damaged replacement work shall be performed by authorized personnel on y 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 thoroughl...

Страница 2: ... Recommended 24 C is suitable for human body Refer page no 21 and 22 owner s manual ...

Страница 3: ......

Страница 4: ......

Страница 5: ...e cable between indoor unit and outdoor unit Checking the drainage and forming the piping Air purging Test running Installation of Indoor Outdoor Unit Flaring Work and Connection of Piping TABLE OF CONTENTS 5 INSTALLATION PARTS INSTALLATION 6 8 Connection of piping Indoor For right rear piping For left rear piping Connection of piping Outdoor ...

Страница 6: ... Additional drain pipe Vinyl tape Narrow Saddle INSTALLATION PARTS 6 Installation parts you must purchase Installation plate Sleeve Bushing Sleeve Putty Gum Type Sealer Bend the pipe as closely on the wall as possible but be careful that it doesn t break Vinyl tape Wide Apply after carrying out a drainahe test To carry out the drainage test remove the air filters and pour water into the heat excha...

Страница 7: ...er Electric Drill Hole Core Drill Dia 70mm Flaring Tool Set Specified torque wrenches 1 8kg m 4 2kg m 5 5kg m 6 6kg m Different depending on model no Spanner Half Union A glass of water Hexagonal Wrench Gas Leak Detector Vacuum Pump Gauge Manifold Owner s Manual Thermometer INSTALLATION TOOLS 7 ...

Страница 8: ...from the floors more than 2 3 meters B 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 space around the back and sides is more than 10cm The front of the unit should have more than 70cm of space Do not place animals and plants in the path of the warm air Take the air conditioner weigh...

Страница 9: ...f line Thread Weight Type A screw Drill the piping hole with a ø70mm hole core drill Drill the piping hole at either the right or the left with the hole slightly slanted to the outdoor side Indoor WALL Outdoor 5 7mm 0 2 0 3 CAUTION Make sure that the drilled hole in the wall is properly sealed using a proper sealant for example cement plaster of paris etc after passing the installation pipe draina...

Страница 10: ...rder to avoid dropping burrs into the tubing E Compare the flared work with figure below If flare is noted to be defective cut off the flared section and do flaring work again C Remove flare nuts attached to indoor and outdoor unit then put them on pipe tube having completed burr removal not possible to put them on after flaring work Copper pipe 90 Slanted Uneven Rough Pipe Reamer Point down Flare...

Страница 11: ...ndoor unit installation Hook the indoor unit onto the upper portion of the installation plate Engage the two hooks of the rear top of the indoor unit with the upper edge of the installation plate Ensure that the hooks are properly seated on the installation plate by moving it left and right A Route the indoor tubing and the drain hose in the direction of rear left Drain hose B Insert the connectin...

Страница 12: ... over the range within which they fit into the rear piping housing section Vinyl tape narrow Adhesive Drain pipe Indoor unit drain hose B Insert the piping drain hose and the connecting cable into the piping hole F Wrap the insulation material around the connecting portion A Route the indoor tubing and the drain hose to the required piping hole position For right rear piping When extending the dra...

Страница 13: ...ation plate Insert the spacer etc between the indoor unit and the installation plate and separate the bottom of the indoor unit from the wall F Connecting the pipings to the indoor unit and the drain hose to drain pipe Align the center of the pipings and sufficiently tighten the flare nut by hand When extending the drain hose at the indoor unit install the drain pipe G Wrap the insulation material...

Страница 14: ...ed at the bottom of chassis J Indoor unit installation Remove the spacer Ensure that the hooks are properly seated on the installation plate by moving it left and right Press the lower left and right sides of the unit against the installation plate until the hooks engage into their slots clicking sound Connection of the pipes Outdoor When tightening the flare nut with torque wrench ensure the dire...

Страница 15: ... the indoor unit should be compiled with the following specifications Type H05VV F approved by HAR or SAA The power connecting cable connected to the indoor and outdoor unit should be compiled with the following specifications Type H07RN F approved by HAR or SAA The connecting cable connected to the indoor and outdoor unit should be compiled with the following specifications Type H07RN F approved ...

Страница 16: ... the unit is subjected during the course of transportation Check them and make sure that they are all tightly fastened If they are loose it could cause burn out of the wires Specification of power source Confirm that electrical capability is sufficient See to that the starting voltage is maintained at more than 90 percent of the rated voltage marked on the name plate Confirm that the cable thickne...

Страница 17: ... connecting cable from down to up Secure the taped piping along the exterior wall Form a trap to prevent water entering the room Fix the piping onto the wall by saddle or equivalent Seal small openings around pipings with a gum type sealer Trap is required to prevent water from entering into electrical parts Seal a small opening around the pipings with gum type sealer Trap Trap Downward slope A To...

Страница 18: ...or unit are kept closed at this stage B Leak test Connect the manifold valve with pressure gauges and dry nitrogen gas cylinder to this service port with charge hoses Be sure to use a manifold valve for air purging 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 150 P S I G with dry nitrogen ...

Страница 19: ...ation Required time for evacuation when 30 gal h vacuum pump is used If tubing length is less than 10m 33 ft 10 min or more 15 min or more If tubing length is longer than 10m 33 ft When the desired vacuum is reached close the Lo knob of the manifold valve and stop the vacuum pump D Finishing the job With a service valve wrench turn the valve stem of liquid side valve counter clockwise to fully ope...

Страница 20: ...ture of the intake and discharge of air 1 2 For reference the gas side pressure of optimum condition is as below Cooling 4 Outside ambient TEMP Thepressureofthegassideservicevalve 35 C 95 F 2 4 5kg cm G 56 8 71 0 P S I G NOTE If the actual pressure are higher than shown the system is most likely over charged and charge should be removed If the actual pressureare lower than shown the system is most...

Страница 21: ...N o t e LSU 18 LSU 15 LSU 05 LSU 04 LSU 01 LSU 07 LSU 12 LSU 02 LSU 09 LSU 19 LSU 14 LSU 03 LSU 10 LSU 16 LSU 13 LSU 08 LSU 20 5 5 2 1 1 4 5 5 2 1 1 7 LSU 17 LSU 06 LSU 11 LSU 22 LSU 21 5 5 2 1 1 7 LSU 23 5 5 2 1 1 7 ...

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