Toshiba S-MMS vs LG MULTI V Plus II I’m going to explain the difference between Inverter system and Digital scroll system. The main subject is the compressor. LG Electronics Inc. LGEHQ CAC Team

1. Compressor comparison Inverter Scroll compressor is the best solution for a commercial building. Reciprocating Compressor Rotary Scroll Strong point Low cost Middle cost, Compressing part is simple Liquid handling capacity Low vibration & noise, high capacity Weak point High Vibration, noise Less liquid handling capacity Low reliability (spring loaded vane) High cost Normal Capacity Low capacity (~1HP) Middle capacity (1~5HP) High capacity (3~10HP) use Refrigerator, WRAC PAC, RAC etc. Multi, Commercial A/C

Total power consumption (kW/h) 2. Power consumption comparison ■ Design condition of HCL COMNET SYSTEMS & SERVICES LTD - Total capacity of system : 560Hp (48Hp * 11EA / 32Hp * 1EA) 48HP 32HP Total power consumption (kW/h) Power consumption (kW/h) Nos. of ODUs Sub total (kW/h) Nos. of ODUs S-MMS 49.67 11 546.37 28.65 1 575.02 MULTI V Plus II 42 462 28 490 ■ Operation condition of A/C units - 24hours / day, 30days / month, 12month / year - Electrical charge : 6Rs / kWh 1month 1year Basic power consumption (kW/h) Total power consumption (kWh) Electrical charge (Rs) S-MMS 575.02 414014.4 2,484,086 29,809,037 MULTI V Plus II 490 352800.0 2,116,800 25,401,600 Gap 85.02 61214.4 367,286 4,407,437

<Cooling Capacity> <Power consumption> 3. Performance comparison under the hot temp. Inverter Scroll compressor has high performance under the condition of hot temp. Outdoor unit 100% Cooling Capacity (kW) Power consumption (kW) Outdoor temp(35℃) Outdoor temp(40℃) S-MMS 135 125.60 49.67 52.55 MULTI V 130.37 42.00 45.38 135 52.55 130.37 49.67 125.60 45.38 42.00 <Cooling Capacity> <Power consumption>

Convenient for handling large capacity 4. Compressor comparison (Efficiency) Rotary compressor is weak for liquid compressing and has 92% cooling and heating efficiency compared to scroll compressor. Toshiba S-MMS MULTI V PLUS II Capacity (kW) 25 24.0 MULTI V PLUS II Type Rotary type Scroll type 20 19.4 16.3 15 ※Based on 1 inverter comp. Structure 13.1 Frequency (Hz) 60 90 120 ※Reference from each companies’ compressor catalogue MULTI V PLUS II Less Liquid handling Convenient for handling large capacity Feature Volumetric Efficiency 92% 100% (Base) Origin of Development Toshiba (Japan) LG (Korea) [Efficiency comparison for compressor type (reference from air-conditioning technology thesis)]

5. Design limit comparison LG MULTI V PLUS II is excellent for maximum pipe length S-MMS MULTI V PLUS II Maximum pipe length 150m 200m Maximum relative pipe length 175m 225m Total expansion pipe length 300m 1000m Height difference (Upper outdoor unit) 50m 100m Height difference (lower outdoor unit) 40m Maximum length after first branch 65m 90m ■ LG MULTI V PLUS II system has a plate type sub-cooling HEX Increased sub-cooling by plate-type heat exchanger Enable to be long piping length and level difference More powerful Cooling operation Plate type SC

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Appendix. Design limit of Toshiba S-MMS

Appendix. Design limit of MULTI V PLUS II Outdoor units MULTI V Plus II 110m ON ON ON Indoor units <DA Research Lab in Korea> 103m

Appendix. Power consumption of Toshiba S-MMS

Appendix. Power consumption of Toshiba S-MMS ■ Power consumption of Toshiba S-MMS 48HP : 49.67kW/h ※ Source - Toshiba Engineering data book

Appendix. Power consumption of Toshiba S-MMS ■ Power consumption of Toshiba S-MMS 32HP : 28.65kW/h ※ Source - Toshiba Engineering data book

Appendix. Power consumption of MULTI V PLUS II ■ Power consumption of MULTI V PLUS II 48HP : 42kW/h

Appendix. Power consumption of MULTI V PLUS II ■ Power consumption of MULTI V PLUS II 32HP : 28kW/h

Appendix. Compressor capacity of Toshiba ■ No of compressors – Toshiba S-MMS 48HP : 8 Compressors (4.2kW*2)*4 ※ Source - Toshiba Engineering data book

Appendix. Compressor capacity of LG MULTI V PLUS II ■ No of compressors - MULTI V PLUS II 48HP : 6 Compressors (5.356kW+5.3kW)*3

Appendix. Delhi temperature

Appendix. Load performance of Toshiba S-MMS ※ Source - Toshiba Engineering data book

Appendix. Load performance of Toshiba S-MMS ※ Source – LG MULTI V PLUS II Engineering data book

Appendix. Certificate for Energy conservation product