1. Perfect solution for large building
and high rise buildings

2. 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

3. Development Plan – Outdoor unit (R22, 50/60Hz)
Combination Unit
Capa.
(HP)
Capacity(HP) ○ 1 5 1 6 ○ ○ 1 8 1 10 ○ 1 12 ○ 1 14 ○ ○ 2 16 2 18 ○ 2 20 ○ 2 22 ○ 2 24 ○ 2 26 ○ 2 28 ○ 3 30 ○ ○ 3 32 3 34 ○ ○ 3 36 3 38 ○ 3 40 ○
C/O
Main
5~16
Sub
8~12
No. of O/door unit
H/P
Main
5~16
Sub
8~12
No. of O/door unit

4. Development Plan – Indoor unit (R22, 50/60Hz)
Under-ceiling

5. 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.

6. Indoor cooling/heating Indoor cooling/heating
Highly efficient Linear control
Low efficiency
(non-linear)
High efficiency
(Linear)
Const.
Speed
Comp.3
Capacity(%)
System
Capacity(%)
System
Const.
Speed
Comp.2
Const.
Speed
Comp.2
Const.
Speed
Comp.1
Const.
Speed
Comp.1
Const.
Speed
Comp.1
Indoor cooling/heating
load(%)
Indoor cooling/heating
load(%)
Variable capacity output by “Bypass system”

7. 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.

8. High Energy Saving Levels
-10℃ Model
-15℃ Model
Item
Unit
By Pass
Daikin
Cooling
Standard
Standard
Heating
Capacity
Cooling
Power
Consup-
tion
Heating
Cooling
COP
Heating
Compared to competitors our products have high COP
and EER.

9. Saving Installation Space Conventional
Sleeve size
Sleeve size
Conventional
4 Unit
2 Unit
Compared to competitors our products have high COP
and EER.

10. Total outdoor unit capacity: 40HP Total outdoor unit capacity : 40HP
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
Sleeve size
Total outdoor unit capacity: 40HP
(LRP-N2900A 4 units)
Total outdoor unit capacity : 40HP
(LRP-N5800B 2 units)

11. Flexible pipe installation in 3 directions

12. Various installation case according to outdoor unit
location

13. 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

14. Longest pipe, highest altitude technology Improved heating and cooling
40HP
Subcooling circuit technology adapting
Double tube heat exchanger(LG patent)
Expansion
valve
Altitude
Double tube
HEX
Indoor
unit
Outdoor
unit
2 phase
refrigerant
Liquid refrigerant
Longest pipe
Spiral tube
Improved heating and cooling
capacity due to advance
subcooling circuit
After Reliability test, installation
possible up to 120m long pipe,
50m altitude

15. improved heating and cooling capacity
due to advance subcooling circuit
Expansion
valve
Double tube
HEX
Indoor
unit
Outdoor
unit
Indoor
unit
Outdoor
unit
2 phase
refrigerant
Liquid 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

16. Wide range of running conditions Cooling range Heating range
competitors
Heating range
competitors

17. Alternate compressor cycling / Back-up function
1) Normal running conditions
Inverter
Const. speed
Const. speed
Const. speed
Multi compressor system with longer life cycle of each
compressor due to alternate working

18. Alternate compressor cycling / back-up function
2) Compressor failure situation
Inverter
Const. speed
Const. speed
Const. speed
Alternative compressor is still running

19. High Safety Measures Control and mechanical parts are perfectly sealed
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

20. Low noise outdoor unit Less 4~5dB Outdoor fan motor has step control
Rear
Side
Front
Rear
Side
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

21. Convenient maintenance | Swing Type Door
Smart aesthetics after installation
Convenient maintenance due to swing type door design

22. Intelligent Fuzzy Control System
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.

23. Installation (Dong Moon High school)
Outdoor unit : 20HP x 13set, 10HP x 13set
Indoor unit : 4 way x 74EA, 1 way x 4EA
Outdoor Unit
1 Way
Cst
4 Way
Cst
4 Way
Cst

24. ■ Schematics of 20HP Cycle H/G Liq. Inj Gas pipe Liquid pipe
Thermister
Solenoid valve
Pressure sensor
Pressure switch
Check valve
LEV
Service valve
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
Accum 정속
Comp
Main Outdoor LEV
Liq. Inj
Drier
Gas
pipe
Outlet temp
Sensor of
Subcooling circuit
sensor
inlet temp
Sensor of
Subcooling circuit
sensor
Liquid
pipe
SC LEV
Liquid
Temp. sensor

25. Enjoy Fresh & Cool Life…
Thank You
Enjoy Fresh & Cool Life…
with LG!!