LG LXN0356QC Owner’s Manual

TELECOM AIR CONDITIONERS
INSTALLATION INSTRUCTIONS

l Please read this instruction sheet completely before installing the product.
l When the power cord is to be replaced, replacement work shall be performed by authorized

personnel only.

l Installation work must be performed in accordance with national wiring standards by authorized

personnel only.

3.0TR SINGLE PHASE: LX-0356QC

3.5TR SINGLE PHASE: LX-0456QC

ENGLISH

INDEX

ENGLISH

1.The following should be always observed for safety ...................

2. Product Specification ..........................................................................

2.1 Product Description .............................................................................

2.2 Inspection ............................................................................................

2.3 Technical specification .......................................................................

3. Installation Standard ..........................................................................

3.1 Pre-check ...........................................................................................

3.2 Levelling of Airconditioner ..................................................................

3.3 Shelter Cut - out sealing ......................................................................

3.4.Condensate Drain Pipe .......................................................................

3.5 Air purging of connecting pipes & Indoor unit ......................................

3.6 Filter Cleaning .....................................................................................

3.7 Installation Drawing - Cases 1& 2 ...............................................

3.8 Installation Drawing - Foundation ......................................................

4. Controller ............................................................................................

4.1 Display & Indicators ...........................................................................

4.2 Pre-Startup instructions ....................................................................

4.3 Operations ...................................................................................

4.4 LCD menu details ........................................................................

5.Trouble Shooting ...............................................................................

5.1 Symptoms & Problems .....................................................................

6.Electrical wiring diagram ..................................................................

6.1 Indoor wiring Diagram .......................................................................

6.2 Outdoor wiring Diagram ....................................................................

6.3 Controller Connection Diagram .........................................................

7.Exploded view .....................................................................................

7.1 indoor unit ..........................................................................................

7.2 Outdoor unit .......................................................................................

7.3 Part List ........................................................................................

4~5

11~14

18~19

20~27

33~34

6

6

6

7

8

8

9

9

9

10

10

15

16

16

17

28

28

29

29

29

30

31

31

32

3

1. The following should be always observed for safety

The supplied unit requires 3 phase supply to operate, so please make sure to have authorised

connection by the supply authority before connecting to the system.

Be sure to read "THE FOLLOWING SHOULD BE ALWAYS OBSERVED FOR SAFETY" before

installing the air conditioner.
Be sure to observe the cautions specified here as they include important items related to safety.
The indications and meanings are as follows.

WARNING

CAUTION

Could lead to death, serious injury, etc.

Could lead to serious injury in particular environments when operated incorrectly.

After reading this manual, be sure to keep it together with the owner's manual in an accessible place.

WARNING

Do not install it yourself (customer).

Incomplete installation could cause injury due to fire, electric shock,
the unit falling or a leakage of water Consult the dealer from whom
you purchased the unit or authorised installer.

Install the unit securely in a place which can bear the

weight of the unit.

When installed in a n insufficient strong place, the unit could f all
causing injured.

Use the specified wires to connect the indoor and the

outdoor units securely and attach the wires firmly to

the terminal board connecting sections so the stress

of the wires is not applied to the sections.

Incomplete connecting and fixing could cause fire.

Check that the refrigerant gas do not leak after

installation is completed.

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.

Perform the installation securely referring to the
installation manual.

Incomplete installation could cause a personal injury due to
fire, electric shock, the unit falling or a leakage of water.

Perform electrical work according to the installation
manual and be sure to use an exclusive circuit.

If the ca pacit y of the power circu it is insuffic ient or there is
incomplete electrical work, it could result in a fire or an electric
shock.

Attach the electrical part cover to the indoor unit and
the service panel to the outdoor unit securely.

If the electrical part cover if the indoor unit and/or the service
panel if the outdoor unit are not attached securely, it could result
in a fire or electric shock due to dust, water, etc.

Be sure to use the part provided or specified parts for
the installation work.

The use of defective parts could cause an injury or leakage of
water due to a fire, electric shock, the unit falling, etc.

Be cautious when unpacking and installing
the product.

Sharp edges could cause injury. Be especially careful of the
case edges and the fins on condenser and evaporator.

Do not modify or extend the power cable.

There is risk of fire or electric shock. Improper wiring or installation may cause fire or electric shock.

Use the correctly rated circuit breaker.

There is risk of fire or electric shock. There is risk of fire or electric shock.

Do not use a defective or under rated circuit breaker.

Use this appliance on a dedicated circuit.

There is risk of fire or electric shock.

Always install a dedicated circuit and breaker.

Always ground the product.

4

CAUTION

Perform the drainage/piping work securely
according to the installation manual.

If there is a defect in the drainage/p iping work, water
could drop from the unit and household goods could be
wet and damaged.

Always check for refrigerant R-22 leakage after
installing or repair of product.

Low refrigera nt R-22 levels may cause malfun ctionin g
of product.

Do not install the product where the noise or hot air
coming from the outdoor unit could harm your
neighbors.

It may cause problem to your neighb ors.

Do not install the product where it will be exposed to
sea wind (Salt spray) directly.

It may cause corro sion on p roduct. Corro sion,
particularly on the condenser and evaporator fins,
could cause product malfunction or in efficie nt operation.

Do not install the unit in a place where an
inflammable gas leaks.

If gas leaks and accumulates in the area surrounding the unit, it
could cause an explosion.

Use two or more people to lift and transport the
product.

Avoid personal injury.

Keep the level of your airconditioner as mentioned
in manual to avoid vibration or water leakage.

ENGLISH

5

2. PRODUCT SPECIFICATION

2.1 PRODUCT DESCRIPTION:

Airconditioner is composed of evaporator unit and condensing unit. Evaporator
unit is positioned on top of condensing unit and connected with interconnection
pipes. Condenser section consists of compressor, propeller fan, fan motor and
condenser coil. And Evaporator section consists of evaporator coil, centrifugal
blower, blower motor and logical controller. Airconditioner is equipped with dual
independent Airconditioning cycle for reliability measures.

2.2 INSPECTION:

1. Check the damage after unit is unloaded, report promptly to the carrier, any
damage found to unit. Do not drop the unit.

2. Open the Packing carefully to check the unit in upright position.

3. Check the unit dents, paint damage, tube pinch offs, tube parts touching with
sheet metals, mechanical components and electrical wires connections.

4. Condensing unit is precharged with R-22 gas from factory. Ensure gas in
condensing unit before installation.

6

2.3 TECHNICAL SPECIFICATIONS

NOMINAL COOLING CAPACITY
TOTAL COOLING CAPACITY

SENSIBLE COOLING CAPACITY
LATENT COOLING CAPACITY

NO OF REFRIGERANT CIRCUITS
COMPRESSOR TYPE

EVAPORATOR FACE AREA

CONDENSER FACE AREA

INDOOR MOTOR TYPE

OUTDOOR MOTOR TYPE

BLOWER

FAN TYPE

CONNECTIONS CONDENSATE DRAIN SIZE

OVERALL DIMENSION-INDOOR (A)WIDTH

WEIGHT-INDOOR WEIGHT GROSS

OVERALL DIMENSION-OUTDOOR WIDTH

WEIGHT-OUTDOOR WEIGHT GROSS

DESCRIPTION

QTY
MAKE
MODEL

QTY
FIN DENSITY/ROWS
MATERIAL OF TUBE/FIN

QTY
FIN DENSITY/ROWS
MATERIAL OF TUBE/FIN

QUANTITY
POWER SUPPLY
SPEED
SHAFT DIAMETER
CLASS OF INSULATION

QUANTITY
POWER SUPPLY
SHAFT DIAMETER
CLASS OF INSULATION
FAN SPEED

TYPE

QTY

FAN MATERIAL
QTY

GAS OUTLET SIZE OD (nos)
LIQUID INLET SIZE,OD (nos)

(B)DEPTH
©HEIGHT

WEIGHT NET

DEPTH
HEIGHT

WEIGHT NET

UNITS LX-0356QC

TR 3.0

BTU/HR 18600 X 2
KCAL/HR 4650 X 2
KCAL/HR 4185 X 2
KCAL/HR 465 X 2

CFM 825 X 2AIRFLOW
NOS 2

NOS 2

Sq.M 0.223
NOS 2

FPI/No 14/2

Sq.M 0.272
NOS 2

FPI/No 14/3

NOS 2

RPM 960

mm 17

NOS 2

mm 12.7

RPM 880

NOS 2

NOS 2

mm 19

mm 12.7x2

mm 9.52x2
mm 665
mm 762
mm 938

KGS 90
KGS 85

mm 665
mm 550
mm 1080

KGS 110
KGS 105

Rotary

Hitachi

SH315CV-C7HU

Cu/Al-Precoat

Cu/Al-Precoat

INDUCTION MOTOR

230V-1PH-50Hz

B CLASS

INDUCTION MOTOR

230V-1PH-50Hz

B CLASS

CENTRIFUGAL,FORWARD

CURVE, DIDW

PROPELLER -AXIAL

Plastic

LX-0456QC

3.5

21000 X 2

5250 X 2
4725 X 2

525 X 2
960 X 2

2

Rotary

2

Hitachi

SH315CV-C7HU

0.223
2

14/3

Cu/Al-Precoat

0.272
2

14/3

Cu/Al-Precoat

INDUCTION MOTOR

2

230V-1PH-50Hz

1100

17

B CLASS

INDUCTION MOTOR

2

230V-1PH-50Hz

12.7

B CLASS

880

CENTRIFUGAL,FORWARD

CURVE, DIDW

2

PROPELLER -AXIAL

Plastic

2

19

12.7x2

9.52x2
665
762
938

92

87
665
550

1080

110

105

ENGLISH

7

3. INSTALLATION STANDARD

3.1 PRE-CHECK:

1. Remove the packing wooden base from indoor & outdoor unit.

2. Place the outdoor unit over mounting base (Concrete or I –beam) and
place antivibration pad and mount as per installation instructions.

3. Positioned the Indoor unit over Top of condensing unit and bolted indoor
with outdoor after fixing indoor to shelter cut-out portion.

4. Check there should not be any dents, dust in interconnecting piping.

5. Prepare inter connection pipe to connect indoor unit with outdoor unit as
per following.

FLARED TYPE INTERCONNECTING PIPING SIZE X QTY.

SUCTION LINE INTERCONNECTING PIPING 1/2 inch X 2

LIQUID LINE INTER CONNECTING PIPING 3/8 inch X 2

6. Wrap Teflon tape in direction of thread to the connectors & service valve before
placing flared tubing.

7. Align the centre of the pipings (2 suctions & 2 liquids) and sufficiently tighten the
flare nut with fingers.

8. Finally tighten the flare nut with torque wrench until the wrench clicks (40~80kgf).
When tightening the flare nut with torque wrench, ensure the direction of
tightening follows the arrow of wrench.

Liquid
Interconnection

Suction
Interconnection

(A)

8

3.2. Levelling of Airconditioner

After placing the unit on Channel/concrete structure
maintain the levelling of unit towards rear side with
10mm slope so as to ensure free flow drainage.
Water seepage problem may happen due to improper
levelling of unit.

3.3. Shelter Cutout sealing

Angle flanges (4 nos) to be fixed with shelter wall after
installation. These flanges are to be fixed with shelter
wall after installation so as to prevent any leakage in
shelter. after fixing the flanges; apply silicon sealant
on edges of flanges to make complete leak free
cut-out. These are not the part of unit accessories.

ENGLISH

(B)

3.4. Condensate Drain pipe

1. Air conditioner is provided with one flexible drain
pipe, which shall be connected to metal Drain pipe
of unit & should be routed through gap between
shelter wall and condensing unit (see fig. C).

2. Do Not leave drain pipe open, your airconditioner
may suck condensate water and cause splitting of
water inside the shelter.

9

(C)

3.5. Air purging of inter connection & Indoor unit

The air which contains moisture remaining in the refrigeration cycle may cause
malfunction of compressor.

1. Confirm the both liquid valves& gas valves are set to closed position.

2. After connecting the piping, check the joints for gas leakage with gas leal
detector.

3. Remove the service port nut, and connect the gauge manifold and vacuum
pump to the service port by charge hose.

4. Vacuum the indoor unit & connecting pipes until the pressure in them lowers
to below 76 cmHg.

5. Remove the valve stem nuts. and fully open the stems of service valves with
hexagon wrench. & Tight the flare nuts of indoor & outdoor unit.

6. Purge the gas qty-80grams in each circuit to remove moist air contents.

7. Disconnect the charge hose and fit the nut to the service port.
(Tightening torque:1.8kg.m)

3.6. Filter Cleaning

The Airconditioner is equipped with fine air filter (2 nos.). The Air filter are at
front of unit shall be checked and cleaned every month or more often
if necessary.

Air-filter

10

3.7. INSTALLATION DRAWING - CASE 1 :
CONCRETE BASEMOUNTING

SHELTER WALL

AC UNIT

ENGLISH

CONCRETE
BASE

11