This document provides information about the HVAC systems at the Preston Prime Mall and Multiplex located in Hyderabad, India. It describes the chilled water air conditioning system for the shopping malls and corridors, the central air conditioning system for the theaters, and split air conditioning systems in the kitchens and service areas. The document outlines maintenance procedures and checklists for the chillers, cooling towers, air handling units, pumps, and split systems to ensure efficient operation and prevent breakdowns.

2. SITE INFORMATION:-
SITE :-PRESTON PRIME MALL AND MULTIPLEX
TYPE :-COMMERCIAL
LOCATION :-OPP. CARE HOSPITAL, GACHIBOWLI,
HYDERABAD
AS PER N.B.C :-GROUP D ASSEMBLY
SUBDIVISION D-6(shopping malls providing facilities
such as shopping, cinema theatres and food courts)
GROUP 1
VIKAS
JYOSHNA
MANISH
ATHOUBA
RYS NIKHIL
RAHUL
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3. HVACSYSTEMS IN SITE:-
1.CHILLED WATER AIR CONDITIONING SYSTEM (FOR SHOPPING MALLS AND CORRIDORS)
2.CENTRAL AIR CONDITIONING SYSTEM (FOR THEATERS)
3.SPLIT AIR CONDITIONING SYSTEM (IN KITCHENS AND SERVICE ROOMS LIKE BMS,ELECTRICAL)
IMPORTANCE OF PREVENTIVE MAINTENANCE FOR HVAC:-
1.LOWER UTILITY BILLS
2. HEALTHY AIR
3.IT INCREASES THE LIFE SPAN OF THE SYSTEM
4.EFFICIENCY
5. LOWER CHANCE OF A CATASTROPHIC BREAKDOWN(IT MAKES LESS EMERGENCY REPAIRS)
6. SAFER EQUIPMENT OPERATION
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4. 1.CHILLED WATER AIR CONDITIONING SYSTEM:-
COMPONENTS:-
1.CHILLER
• EVAPORATOR
• COMPRESSOR
• CONDENSER
2. WATER COOLED CONDENSER
• COOLING TOWER
• CONDENSER WATER PUMP UNIT
3.AIR HANDLING UNIT
• FAN-COIL UNIT (FCU)
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5. 1.CHILLER
2.COOLING TOWER
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6. 3.AIR HANDLING UNIT
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7. HVAC CYCLE
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8. 2.CENTRAL AIR CONDITIONING SYSTEM
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9. CENTRAL AIR CONDITIONING SYSTEM (IN THEATERS)
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10. PROCEDURE DAILY WEEKLY MONTHLY HALF-YEARLY
Check Pump Oil Level ✓
Oil Leak Inspection ✓
Check For Weird Noise
And Vibration ✓
Inspect All Air Leaks ✓
Inspect Belts. ✓
Check Air Filters, Clean
Or Replace ✓
Check Safety Relief Valve ✓
Check Belts If Necessary ✓
Check And Tighten All Bolts ✓
Check Connections For Leaks ✓
Service Of Air Compressor ✓
HVAC MAINTENANCE CHECKLIST
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11. CHILLER MAINTENANCE
 CHECK OPERATING CONDITIONS INCLUDING
 KEEP TUBES CLEAN FOR EFFICIENT HEAT TRANSFER
 TREAT CONDENSER WATER TO PREVENT SCALE, CORROSION
 KEEP CHILLED WATER FLOW RATE BETWEEN 3 TO 12-FT PER SECOND
 MAINTAIN ADEQUATE REFRIGERANT CHARGE
 LOWER ENTERING WATER TEMPERATURE
 CHECK ELECTRICAL CONNECTIONS, WIRING, AND SWITCHGEAR RELATED TO THE CHILLER FOR HOT SPOTS AND
WORN CONTACTS.
 CLEAN MOTOR COOLING AIR VENTS TO ENSURE MAXIMUM COOLING EFFECT. 11
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12. COMPRESSOR:- CE
:-
 CHECK THE COMPRESSOR OIL LEVEL
 INSPECT THE ENTIRE SYSTEM SO AS TO DETECT ANY EVENTUAL
ABNORMALITY: NOISY COMPRESSOR, LOOSE CASING PANELS, LEAKY PIPES
 RECORD TEMPERATURES, PRESSURES AND ANY OTHER OBSERVATIONS IN
THE SERVICE LOG
COOLING TOWER MAINTENANCE
MONTHLY WATER TREATMENT
 ONCE A MONTH, THE WATER IN YOUR COOLING TOWER NEEDS TO BE TREATED WITH A CORROSION
INHIBITOR AND BIOCIDES TO INSURE THAT BACTERIA LEVELS ARE LOW
WATER TESTING
 LEGIONELLA TESTING IS RECOMMENDED AT LEAST ONCE PER YEAR
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13. DEEP CLEANING AND WINTERIZING
 SEASONAL COOLING TOWERS NEED A DEEP CLEANING OF ALL INTERIOR SURFACES OF THE TOWER AT LEAST
ONCE PER YEAR, AND 12-MONTH COOLING TOWERS SHOULD BE CLEANED TWICE PER YEAR.
 THE PROCESS INVOLVES ADDING CLEANING CHEMICALS AND CIRCULATING FOR 6 TO 24 HOURS, DEPENDING
ON THE SYSTEM AND USAGE, THEN DRAINING AND FLUSHING OUT THE SYSTEM.
AIR HANDLING UNIT MAINTENANCE
 CHECK YOUR AIR DAMPERS
 CHECK HEATING AND COOLING COILS AND VALVE
 STATUS OF THE AIR FILTERS
 ENSURE THE PROPER OPERATION OF YOUR AIR SIDE ECONOMIZER
 CLEAN EACH BLADE OF THE DIFFUSER IN TURN, GENTLY REMOVING ALL OF THE DIRT AND RINSING THE
CLOTH BEFORE MOVING ON TO THE NEXT ONE.
 ONCE THE WHOLE DIFFUSER IS CLEAN AND YOU CANNOT SEE ANY DUST OR DEBRIS BEHIND THE BLADES,
GIVE IT A QUICK POLISH WITH A DRY CLOTH TO MAKE SURE THAT IT IS DRY.
SYSTEM MAINTENANCE
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14.  MECHANICAL COMPONENTS SUCH AS FANS, MOTORS, BELTS AND GEARS NEED TO BE CLEANED, ADJUSTED AND
REPLACED IF WORN.
 ELECTRICAL COMPONENTS SUCH AS WIRING AND CAPACITORS NEED TO BE CHECKED AND REPLACED IF NEEDED.
PUMPS MAINTENANCE
 CHECK AMPS & VOLTS ON PUMPS
 CHECK PRESSURE GAUGES
 CHECK PRESSURE REDUCING VALVES SYSTEM
 CHECK CONTROL PANEL & SPRAY FOR PROTECTION
 CHECK CIRCUIT BREAKERS, CLEAN AREA
 LUBRICATE BEARINGS ON PUMPS & MOTORS
CHECK VIBRATION/NOISE ON MOTOR & PUMPS
 CHECK & CLEAN SUCTION GUIDE STRAINERS
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15. 3.SPLIT AIR CONDITIONING SYSTEM
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16. REFRIGERATION CYCLE
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17. SPLIT AIR CONDITIONING SYSTEM MAINTENANCE
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 http://www.abemap.com/preventive-maintenance-programs/
 https://www.trane.com/residential/en/for-owners/maintenance-tips/
 http://www.crockett-facilities.com/facilities-maintenance/checklist-air-handling-
units-maintenance/
 https://aristair.com/blog/hvac-cooling-tower-maintenance-checklist/
 https://www.facilitiesnet.com/hvac/article/5-Steps-to-Chiller-Efficiency--2192
 https://www.contractingbusiness.com/commercial-hvac/ten-tips-commercial-chiller-
maintenance
 https://blackdiamondtoday.com/article/annual-hvac-system-maintenance
REFERENCE
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