Replacement of AHUs (Phase-I, 8 Nos) of ATS Complex, Southern Region, Chennai Airport. SH Replacement of AHUs in Technical Building

Dismantling the existing air handling units of following capacity i/c motor, blower, cooling coil, electrical panel, Chilled water pipelines at Inlet & Outlet of AHUs upto 3-way mixing valve, etc with all associated accessories and handing over of all dismantled items to AAI stores, including transportatioin, etc complete as required.

20 TR capacity at Third floor

30 TR capacity at Second floor & Third floor

Supply of factory built floor mounted chilled water double skin type Air Handling Units made of 25mm thick panels consisting pre plasticised G.I casing of thickness 0.8mm outside layer and 0.8mm inside layer with polyurethene foam(PUF) insulation having 38 kg/cu.M density, factory injected between them by injection moulding machine, complete with blower section with Backward curve blower, blower suitable for static pressure as detailed below, PVC drift eliminators, cooling coil section with aluminium finned copper tubes (tube thickness not less than 0.5mm) cooling coil, filter sections with 50mm thick metal viscous /washable synthetic type air pre-filters, belt drive package with TEFC drive motor of efficiency class IE4 suitable for 415 ± 10% volts, 50Hz, 3 phase, AC Supply, suitably designed for variable frequency drive applications, drain connections, stainless steel (18G) drain pan with PUF insulation, LED light with door switch, Provision to install UVGI lamps between cooling coil and blower, PCC cubicals to position the base frame of AHUs, necessary vibration isolation arrangement etc., complete as per specification and of following capacities:

a)20 TR Capacity, 10,900CFM b)K.Calorie per hour-60,000 c)C.M Hr.- 18,520 d)Rows deep-4 e)Static pressure -75mmWC f)Filtration standard-90% efficiency down to 10 Microns g) Supply blower - 1 No

a)30 TR Capacity, 16,800CFM b)K.Calorie per hour-90,000 c)C.M Hr.- 28,544 d)Rows deep-4 e)Static pressure -75mmWC f)Filtration standard-90% efficiency down to 10 Microns g) Supply blower - 1 No

Installation, Testing & Commissioning of above air handling units at following locations for successful operation complete as required.

20 TR & 10,900 CFM Capacity at Third floor of ATS Complex

30 TR & 16,800 CFM Capacity at Third floor of ATS Complex

The associated works complete to enable the commissioning of AHUs as required as below: a) Necessary modification in the existing GI ducting to made suit the mouth connection with the new AHU including supply & fixing of necessary thermal & acoustic insulation as required b) Necessary modification in the existing MS Chilled water pipeline including supply & fabrication of required new MS 'C' class pipes, drain valve, supports, insulation with PUF sections, vapour barrier, GI wire mesh, sand cement plastering, Coloring, etc between butterfly valves & AHU. c) Necessary modification in the existing drain water piping for trouble free draining of condensate water including fabricating, supplying, fixing a 'U' trap with both side flanges (easy removal for cleaning) at the drain outlet of AHU. d) Termination of existing power cable, earth wires, control cables, etc

20 TR & 10,900 CFM Capacity at Third floor of ATS Complex

30 TR & 16,800 CFM Capacity at Third floor of ATS Complex

20 TR & 10,900 CFM Capacity AHU at Third floor of ATS Complex

30 TR & 16,800 CFM Capacity AHU at Third floor of ATS Complex

Supply of following size butterfly valve wafer type with matching flanges, bolt nuts and insulation for chilled water header pipes in the AHU rooms.

100 mm dia

65 mm dia

Fixing of following size butterfly valves wafer type with matching flanges, bolt nuts, insulation, etc after made cutting in the existing chilled water header pipes of AHU rooms including removal of existing insulation etc complete as required.

100 mm dia

65 mm dia

Supply of following size butterfly valve wafer type with matching flanges, bolt nuts and insulation for supply & return chilled water pipes of AHUs.

65 mm dia

Fixing of following size butterfly valve wafer type with matching flanges, bolt nuts, insulation, etc after made cutting in the existing supply & return chilled water pipes of AHUs including removal of existing insulation etc complete as required.

65 mm dia

Supply of following size balancing valve with matching flanges and insulation

65 mm dia

Fixing of following size balancing valve with matching flanges and insulation

65 mm dia

Supply of following size MS " Y" Strainer with matching flanges and insulation

65 mm dia

Fixing of following size MS " Y" Strainer with matching flanges and insulation

65 mm dia

Supply of following size 3-way Modulating valve with actuator, matching flanges, insulation. Thermostat with temperature adjustment, necessary wiring for normal working, etc complete as required.

65 mm dia

ITC of following size 3-way Modulating valve with actuator, matching flanges, insulation. Thermostat with temperature adjustment, necessary wiring for normal working, etc complete as required.

65 mm dia

Supply of 25 mm ball valve with MS pipe nipple for AHU Chilled water Header lines

Fixing of 25 mm ball valve with MS pipe nipple for AHU Chilled water Header lines

Supply of industrial type Thermometer with adopter for AHU chilled water line,etc complete as required.

Fixing of industrial type Thermometer with adopter for AHU chilled water line,etc complete as required.

Supply of dial type Pressure gauges having 150mm dia for AHUs including forged ball valves and pipe stem,etc complete as required.

Fixing of dial type Pressure gauges having 150mm dia for AHUs including forged ball valves and pipe stem,etc complete as required.

Supply of Canvass Connection between AHU & Duct made of fire retardant type cloth etc complete as required.

Fixing of Canvass Connection between AHU & Duct made of fire retardant type cloth etc complete as required.

Supply of Opposed blade G.I Construction box type factory fabricated duct Volume Control Damper made of 18 SWG thick GI Sheet complete with nuts, bolts, screw, linkage, flanges, etc duct lever and quadrants etc complete as required.

ITC of Opposed blade G.I Construction box type factory fabricated duct Volume Control Damper made of 16 SWG thick GI Sheet complete with nuts, bolts, screw, linkage, flanges, etc duct lever and quadrants etc complete as required.

SNOWMEX ENGINEERS LIMITED

GEMINI COOLING SYSTEMS PROJECTS PRIVATE LIMITED