1. Results from HVAC Audit of Sutherland’s Padi Facility Presentation to Mr. K.P. Nair & Mr. Ramunni Nair Version 1 October 6, 2007

6. Chiller (Technical Information) Compressor oil pressure 6 77PSI 215PSI Refrigerant pressure suction discharge 5 31.92 ˚c Condenser inlet temperature 3 39.20 ˚c Condenser outlet temperature 4 Compressor oil level 7 167Amp 8.4 ˚c 10.0 ˚c Plant No - 2 10.0°C Plant No - 1 Compressor motor current 8 Chiller outlet temperature 2 Chiller inlet temperature 1 Particulars #

7. AHU Air Flow Standard 40TR AHU air volume 16000 CFM Standard 25TR AHU air volume 10000 CFM 16.0 ˚C 15.0 ˚C 14.5 ˚C 14.0 ˚C 13.5 ˚C 15.5 ˚C 12.0 ˚C 12.0 ˚C Canvas Temperature 6992 22.0 ˚C 8 th Floor 25TR 6 10778 23.0 ˚C 8 th Floor 40TR 5 12253 22.5 ˚C 7 th Floor 40TR 3 1520 23.0 ˚C 7 th Floor 25TR 4 10778 24.0 ˚C 9 th Floor 40TR 7 6547 6230 12140 Air Volume (CFM) 23.0 ˚C 21.5 ˚C 21.5 ˚C Return Air Temperature 9 th Floor 25TR 8 6 th Floor 25TR 2 6 th Floor 40TR 1 Particulars #

9. Maximum Consumption of Cooling System Cooling System COP/EER Chiller Plant 2x140TR Cooling Towers 2x140TR Chiller Plant Water Motor 3x12.5 HP AHU (292 TR) 4x40TR, 4x25TR,10TR Current: 178TR Current: 140TR Current: 2x140TR Current: 2x12.5HP Current: 38.5TR 3  Split A/C 2x10TR, 1x7.5TR, 2x5.5TR Cooling Tower Pump Motors 3x12.5 HP Current: 2x12.5 HP

11. Capacity Vs Utilization 140 TR Chiller Chiller TR = Factor x Water Flow Rate x (Tin – Tout)/12000 = 500 x 840 x (50 - 47)/12000 = 105 TR Installed capacity is 140 TR and consumption is 105 TR Utilization = 105/140 = 75% Chilled Water Flow Rate: 840 US GPM 47.0°F 50.0°F Water Temperature 8.4°C 10.0°C Water Temperature Chiller outlet temperature 2 Chiller inlet temperature 1 Particulars 140TR

12. Capacity vs. Utilization AHU (6 th Floor North and South) 6 th Floor South AHU Utilization = 2.60/4.5 = 58% 6 th Floor North AHU Utilization = 1.6/7.24 = 22% Considering (COP) 1TR =0.181 kW for AHU, 2.60 TOTAL 0.57 0.60 0.55 PF 5.65 5.65 5.73 Current (A) 1.01 236.1 B 0.86 234.3 Y 0.73 235.0 R KW Voltage (V) South 1.61 TOTAL 0.36 0.39 0.38 PF 6.10 6.13 6.04 Current (A) 0.52 232.2 B 0.56 232.7 Y 0.53 232.0 R KW Voltage (V) North

13. Capacity vs. Utilization AHU - CFM (6 th Floor North and South) TR for AHU = Factor X Air flow X (Hin – Hout) Enthalpy difference/12000 = 4.45 X 12140 X(29-22)/12000, = 31.5 TR Installed capacity is 40TR and consumption is 31.5TR,% of utilization = 31.5/40 = 78.5% TR for AHU = Factor X Air flow X (Hin – Hout) Enthalpy difference/12000 = 4.45 X 6230X(36.5-28)/12000 = 19.63 TR Installed capacity is 25TR and consumption is 20TR, % of utilization = 19.63/25 = 78.5% Enthalpy difference (Hin and Hout ) is obtained from psychrometric chart 17.5 ˚C DBT 17.0 ˚C WBT 12.0 ˚C DBT 11.5 ˚C WBT Leaving Air Temperature 6230 12140 Air Volume (CFM) 26.5 ˚C DBT 22.0 ˚C WBT 21.5 ˚C DBT 16.0 ˚C WBT Enter Air Temperature 6 th Floor 25TR 2 6 th Floor 40TR 1 Particulars #

14. Capacity vs. Utilization AHU (7 th Floor North and South) 7 th Floor South AHU Utilization = 1.95/4.5 = 43% 7 th Floor North AHU Utilization = 2.08/7.24 =29% Considering ( COP) 1TR = 0.181 kW for AHU, 1.95 TOTAL 0.46 0.52 0.50 PF 5.76 5.59 5.39 Current (A) 0.63 234.6 B 0.68 233.2 Y 0.64 231.2 R KW Voltage (V) South 2.08 TOTAL 0.45 0.47 0.45 PF 6.67 6.43 6.38 Current (A) 0.71 234.6 B 0.71 232.9 Y 0.66 230.2 R KW Voltage (V) North

15. Capacity vs. Utilization AHU - CFM (7 th Floor North and South) TR for AHU = Factor X Air flow X (Hin – Hout) Enthalpy difference/12000 = 4.45 X 12253 X(31.5-25.5)/12000, = 27.3 TR Installed capacity is 40TR and consumption is 27.3TR ,% of utilization = 27.3/40 = 68.25% TR for AHU = Factor X Air flow X (Hin – Hout) Enthalpy difference/12000 = 4.45 X 1520 X(31.0-24.0)/12000, = 5.7 TR Installed capacity is 25TR and consumption is 5.7TR ,% of utilization = 5.7/25 = 22.8% Enthalpy difference (Hin and Hout ) is obtained from psychrometric chart 13.5 ˚C DBT 13.0 ˚C WBT 15.5 ˚C DBT 15.0 ˚C WBT Leaving Air Temperature 1520 12253 Air Volume (CFM) 23.0 ˚C DBT 17.5 ˚C WBT 22.5 ˚C DBT 18.0 ˚C WBT Enter Air Temperature 7 th Floor 25TR 2 7 th Floor 40TR 1 Particulars #

16. Capacity vs. Utilization AHU (8 th Floor North and South) 8 th Floor South AHU Utilization = 1.29/4.5 = 29% 8 th Floor North AHU Utilization = 1.66/7.24 = 23% Considering (COP) 1TR = 0.181 kW for AHU, 1.29 TOTAL 0.40 0.44 0.37 PF 4.62 4.63 4.45 Current (A) 0.44 234.4 B 0.48 234.5 Y 0.37 232.7 R KW Voltage (V) South 1.66 TOTAL 0.36 0.36 0.40 PF 6.10 6.47 6.40 Current (A) 0.52 233.2 B 0.54 234.1 Y 0.60 233.1 R KW Voltage (V) North

17. Capacity vs. Utilization AHU - CFM (8 th Floor North and South) TR for AHU = Factor X Air flow X (Hin – Hout) Enthalpy difference/12000 = 4.45 X 10778 X(31.5.0-24.5)/12000, = 26TR Installed capacity is 40TR and consumption is 26TR ,% of utilization = 26/40 = 65% TR for AHU = Factor X Air flow X (Hin – Hout) Enthalpy difference/12000 = 4.45 X 6992 X(30-24.0)/12000, = 15.56 TR Installed capacity is 25TR and consumption is 16TR ,% of utilization = 15.56/25 =62.3% Enthalpy difference (Hin and Hout ) is obtained from psychrometric chart 14.5 ˚C DBT 13.0 ˚C WBT 14.0 ˚C DBT 14.0 ˚C WBT Leaving Air Temperature 6992 10778 Air Volume (CFM) 22.0 ˚C DBT 17.0 ˚C WBT 23.0 ˚C DBT 17.5 ˚C WBT Enter Air Temperature 8 th Floor 25TR 2 8 th Floor 40TR 1 Particulars #

18. Capacity vs. Utilization AHU (9 th Floor North and South) 9th Floor South AHU Utilization = 2.98/7.24 = 41% 9th Floor North AHU Utilization = 1.74/4.5 = 39% Considering (COP) 1TR = 0.181 kW for AHU, 2.98 TOTAL 0.54 0.60 0.53 PF 7.74 7.79 7.59 Current (A) 0.98 234.7 B 1.10 233.6 Y 0.90 232.7 R KW Voltage (V) South 1.74 TOTAL 0.18 0.50 0.69 PF 5.14 7.21 5.00 Current (A) 0.21 228.9 B 0.84 229.2 Y 0.79 226.8 R KW Voltage (V) North

19. Capacity vs. Utilization AHU - CFM (9 th Floor North and South) TR for AHU = Factor X Air flow X (Hin – Hout) Enthalpy difference/12000 = 4.45 X 10778 X(31.5-25.5)/12000, = 40 TR Installed capacity is 40TR and consumption is 39.96TR ,% of utilization = 40/40 = 99.9% TR for AHU = Factor X Air flow X (Hin – Hout) Enthalpy difference/12000 = 4.45 X 6547 X(31.5-25.0)/12000, = 15.8 TR Installed capacity is 25TR and consumption is 16TR ,% of utilization = 16/25 = 64% Enthalpy difference (Hin and Hout ) is obtained from psychrometric chart 16.0 ˚C DBT 14.0 ˚C WBT 15.0 ˚C DBT 14.0 ˚C WBT Leaving Air Temperature 6547 10778 Air Volume (CFM) 23.0 ˚C DBT 18.0 ˚C WBT 24.0 ˚C DBT 22.5 ˚C WBT Enter Air Temperature 9 th Floor 25TR 2 9 th Floor 40TR 1 Particulars #

21. AHU (6 th Floor) Observations A/C mounted on top of battery rack

23. 5TR Split A/C (6 th Floor) Observations Permanent wires disconnected Temporary wires connected

24. 3TR Split A/C (6 th Floor) Observations No air filter

25. 3TR AHU (6 th Floor) Observations Unprofessional way of routing No earth connection

26. 3TR AHU (6 th Floor) Observations Filter not removable

28. 25 TR AHU (6 th Floor, B-wing) Observations AHU with no filter

29. No air filter 25 TR AHU (6 th Floor, B-wing) Observations Fins damaged

31. AHU Condensing Grills (6 th Floor) Observations Condensing grill got damaged Fins damaged

33. AHU Room (6 th Floor, B-wing) Observations All unwanted materials exist in room

34. AHU Room (6 th Floor, B-wing) Observations Unwanted materials near pipeline Rusted meter tube Dust and dirt deposited on meter

35. AHU Room (6 th Floor, B-wing) Observations Unnecessary cables at AHU

36. Drying pipe blocked AHU Room (6 th Floor, B-wing) Observations

38. Thermo Control Valve (6 th Floor, B-wing) Observations Damaged thermo control valve Missing 3 way mixing valve moter

40. Cafeteria (6 th Floor) Observations No partition between cafeteria and wash room Exhaust fan sucking cool air

41. Cafeteria (6 th Floor) Observations Open windows with A/C running

43. Chilled Water Line (8 th Floor) Observations Gap on chilled water line

45. Chiller Plant Motor Starters (Terrace) Observations Seepage Starter enclosures in poor condition Pipeline too close to starters

47. Chiller Plant Pumps (Terrace) Observations Pump rusted No proper enclosure on motor Seepages

48. Chiller Plant Pumps (Terrace) Observations Pumps rusted No enclosure at termination Seepages

49. Chiller Plant Pumps (Terrace) Observations Dust and dirt on the floor Termination box open Leakage

51. Chilled Water Pipes (Terrace) Observations Pipes rusted

53. Chiller Plant Panel (Terrace) Observations Panel got rusted