Perfect solution for large building
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Perfect solution for large building. Perfect solution for large and high rise buildings. is technically advanced with maximized cooling load, high efficiency and very economical system. was developed to focus large buildings and high rise buildings. Large capacity models(20HP~40HP)

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Perfect solution for large and high rise buildings

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Perfect solution for large and high rise buildings

Perfect solution for large building

Perfect solution for large

and high rise buildings


Perfect solution for large and high rise buildings

is technically advanced with maximized

cooling load, high efficiency

and very economical system.

was developed to focus large buildings and high rise buildings.

  • Large capacity models(20HP~40HP)

  • Longest pipe length is 120m

  • Total maximum pipe length is 220m


Perfect solution for large and high rise buildings

24

26

28

30

32

34

5

6

12

36

38

40

8

10

14

16

20

22

18

2

2

2

3

3

3

1

1

1

3

3

3

1

1

1

2

2

2

2

Sub

8~12

2

2

2

3

1

1

1

3

3

1

1

1

2

2

2

3

3

3

2

Development Plan – Outdoor unit (R22, 50/60Hz)

Combination Unit

Capa.

(HP)

Capacity(HP)

C/O

Main

5~16

Sub

8~12

No. of O/door unit

H/P

Main

5~16

No. of O/door unit


Perfect solution for large and high rise buildings

Development Plan – Indoor unit (R22, 50/60Hz)

Under-ceiling


Perfect solution for large and high rise buildings

  • High efficiency & Low noise inverter scroll compressor

  • Inverter scroll compressor is totally

    designed and developed by LG

  • More powerful and dynamic multi power system*

  • Single pipe system (1 pair of pipe from outdoor unit)

  • Widest line up(8HP~40Hp)

*Multi power system : Consist of 1 inverter compressor and

other constant speed compressors.


Perfect solution for large and high rise buildings

Const.

Speed

Comp.2

Const.

Speed

Comp.2

Const.

Speed

Comp.3

Const.

Speed

Comp.1

Const.

Speed

Comp.1

Const.

Speed

Comp.1

Highly efficient Linear control

Low efficiency

(non-linear)

High efficiency

(Linear)

System

Capacity(%)

System

Capacity(%)

Indoor cooling/heating

load(%)

Indoor cooling/heating

load(%)

Variable capacity output by “Bypass system”


Perfect solution for large and high rise buildings

Variable capacity

“Bypass system”

Multi V plus

  • Low efficiency at low load

    conditions

  • Small steps load variation is

    difficult to control

  • For over load conditions (100%↑),

    additional compressor is required.

    So power consumption increases

    4~6kW. In heating mode, additional

    heater required(4~6kW)

  • High efficiency at low load

    conditions

  • Small steps load variation by

    precise linear control of inverter

    compressor

  • All load conditions control by

    variable frequency(30Hz~120Hz).

    Thus minimizing number of

    compressors required.


Perfect solution for large and high rise buildings

Standard

Standard

-10℃ Model

Cooling

Cooling

Heating

Heating

High Energy Saving Levels

-15℃ Model

Item

By Pass

Unit

Daikin

Cooling

Heating

Capacity

Power

Consup-

tion

COP

  • Compared to competitors our products have high COP

    and EER.


Perfect solution for large and high rise buildings

Saving

Installation Space

Sleeve size

Sleeve size

Conventional

2 Unit

4 Unit

  • Compared to competitors our products have high COP

    and EER.


Perfect solution for large and high rise buildings

Sleeve size

  • In 40HP case floor area comparison between 10hp and

  • 20 hp models (21% space saving)

Area 7.1m2

Area 9.03m2

Conventional

  • Through the wall sleeve pipe diameter area

    (50% area saving)

Sleeve size

Total outdoor unit capacity: 40HP

(LRP-N5800B 2 units)

Total outdoor unit capacity: 40HP

(LRP-N2900A 4 units)


Perfect solution for large and high rise buildings

Flexible pipe installation in 3 directions


Perfect solution for large and high rise buildings

  • Various installation case according to outdoor unit

  • location


Perfect solution for large and high rise buildings

  • Moving and handling of “conventional” unit

  • - Cost is high

  • - Possibility of drop while using cranes

  • Moving and handling of “Multi-V plus” unit

    - Outdoor unit size is compact

  • - Easy to handle through fork lift slot


Perfect solution for large and high rise buildings

Longest pipe, highest

altitude technology

40HP

Subcooling circuit technology adapting

Double tube heat exchanger(LG patent)

Expansion

valve

Altitude

Double tube

HEX

Indoor

unit

Outdoor

unit

Liquid refrigerant

2 phase

refrigerant

Spiral tube

Longest pipe

  • Improved heating and cooling

    capacity due to advance

    subcooling circuit

  • After Reliability test, installation

    possible up to 120m long pipe,

    50m altitude


Perfect solution for large and high rise buildings

improved heating and cooling capacity

due to advance subcooling circuit

Expansion

valve

Double tube

HEX

Indoor

unit

Outdoor

unit

Indoor

unit

Outdoor

unit

Liquid refrigerant

2 phase

refrigerant

Spiral tube

Conventional

New Subcooling Circuit

  • Subcooling control is stable

  • Pressure drop is minimum even in

    long piping : keeping total capacity

  • Proper amount of liquid refrigerant

    can be t to indoor unit

  • Prevent indoor unit capacity drop.

  • Reduce total refrigerant amount

    (LG 100%, Daikin 112%, Mitsubishi 118%)

  • Subcooling control is unstable

  • Pressure drop is large if use

    long piping

  • Refrigerant amount is unstable

  • Indoor unit capacity drops


Perfect solution for large and high rise buildings

Wide range of

running conditions

Cooling range

competitors

Heating range

competitors


Perfect solution for large and high rise buildings

Alternate compressor cycling / Back-up function

1) Normal running conditions

Const. speed

Const. speed

Const. speed

Inverter

  • Multi compressor system with longer life cycle of each

    compressor due to alternate working


Perfect solution for large and high rise buildings

Alternate compressor cycling / back-up function

2) Compressor failure situation

Const. speed

Const. speed

Const. speed

Inverter

  • Alternative compressor is still running


Perfect solution for large and high rise buildings

High Safety Measures

Heat exchanger

Safety cover

  • Control and mechanical parts are perfectly sealed

  • Separated equipments space (compressor,control box)

    and heat exchanger space

  • Resistant to dust, rain, corrosion and other

    environment factors


Perfect solution for large and high rise buildings

Low noise outdoor unit

Less

4~5dB

Rear

Side

Rear

Side

Front

Front

  • Outdoor fan motor has step

    control

  • Noise transfer from compressor

    to HEX

  • Outdoor fan motor has

    inverter control

  • Low noise due to separated parts

    and prevented by safety cover


Perfect solution for large and high rise buildings

Convenient maintenance | Swing Type Door

  • Smart aesthetics after installation

  • Convenient maintenance due to swing type door design


Perfect solution for large and high rise buildings

Intelligent Fuzzy Control System

Fuzzy control

Target

PID control

Time

  • In start up, fuzzy control senses ambient & room temperature

    and achieve target in shortest time as per the load condition.

  • Stabilize indoor air temperature to optimum level.

  • High capability & Reliability of the unit is assured by preventing

    overshooting and making use of all control system accurately.

  • In heating mode, keeping the indoor unit capacity down to the

    –10℃ of outdoor temperature.


Perfect solution for large and high rise buildings

Outdoor Unit

1 Way

Cst

4 Way

Cst

4 Way

Cst

Installation (Dong Moon High school)

  • Outdoor unit : 20HP x 13set, 10HP x 13set

  • Indoor unit : 4 way x 74EA, 1 way x 4EA


Perfect solution for large and high rise buildings

Thermister

Solenoid valve

Pressure sensor

Pressure switch

Check valve

LEV

Service valve

■ Schematics of

20HP Cycle

Air temp.

sensor

High pressure sensor

HEX thermostat

of outdoor unit

Reversing

Valve

H/G

Low

Pressure

sensor

Suction

Temp sensor

O/S

O/S

Compressor

Discharge

Temp.

sensor

Inv

Comp

정속

Comp

Accum

Main Outdoor LEV

Liq. Inj

Gas

pipe

Drier

inlet temp

Sensor of

Subcooling circuit

sensor

Outlet temp

Sensor of

Subcooling circuit

sensor

Liquid

pipe

SC LEV

Liquid

Temp. sensor


Perfect solution for large and high rise buildings

Thank You

Enjoy Fresh & Cool Life…

with LG!!


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