Design and install Chillers and Chilled water system

HIGH SIDE

CHILLERS

• Energy efficient Air-cooled, water Screw chillers of suitable Tonnage as per design requirement, using environment friendly refrigerant (Non CFC), suitable for outdoor installation with weatherproof enclosure.
• The total load to be catered by multiple chillers. Each chiller preferably to have multiple compressors of equal tonnage capacity.
• 50% standby (Redundancy factor) shall be considered for chillers during design
• Chiller OEM (Original Equipment Manufacturer) will provide local trained personnel in India, in case of imported chillers.

AIR HANDLING UNITS (AHU’S) & MAKEUP AIR UNITS (MAU’S)

• Work out the no. of AHU’s & MAU’s required as per proposed facility design and layout.
• AHU’s to be horizontal draw through type.
• AHU’ panels to be double skin having minimum thickness of 50mm and PUF infill. To be fabricated from 20 SWG/22 SWG galvanized zinc sheet, inside plain and outside coated with epoxy.
• Framework of AHU’s to be of extruded sections with thermal break bolted together. All panels to be detachable or hinged. Complete casing to have earthing connections at two ends.
• Blower & motor assembly as per proposed design requirements.
• Motorized fire dampers to be installed to isolate different fire rated areas connected by ducts from fire-affected areas
• Cooling coils to be factory tested and vendor to provide test certificates.
• Special drives (VFD/VSD) to be provided for all motors to be provided to match the loads and adjust frequency/voltage and operate motors in an efficient manner.
• All AHU enclosures to be designed for sound levels less than 60 decibels and vibration free.

LOW SIDE

CHILLED WATER PUMPS AND PIPELINE

CHILLED WATER PUMPS AND PIPELINE

• Pumps to be Horizontal end suction/back pull out type water pump sets with bronze Impellers and mechanical seals for chilled water re-circulation complete with TEFC squirrel cage motor of adequate rating, coupling, base plate, anti-vibration pads etc.
• Number of pumps to be designed with adequacy for standby.
• Chilled water pipe line to have required Balancing valves with flow measuring devices, pressure gauges with required isolation Valves/filters/strainer/pressure gauges etc.
• Pressurization units to be considered for making up the water in the line and maintaining required design pressure.

AIR DISTRIBUTION SYSTEM

• Ducting to be of cold rolled, cold annealed (CRCA) sheets of 20-24 gauge continuously galvanized.
• Fabrication of ducts to be as per SMACNA standard with gaskets, bend/elbows.
• Ducts shall be cladded with aluminium sheets including those exposed to the ambient.
• Ducts to be vibration free
• Grills and diffusers to be fabricated out of aluminium extruded material.