Replacement of AHUs and TFAs of T1 and T4 Terminal Buildings at C.I.A Phase IV

Amount

Dismantling the existing air handling unit of following capacity i/c motor, connected ducts, blowers, cables, clamps, sensors, terminations and electrical panel with all accessories including shifting and handing over to AAI stores,etc complete as required.

AHUs of capacity above 30000 CFM upto 45000 CFM

AHUs and TFAs of capacity Upto 30000 CFM

Supply of factory built floor mounted chilled water double skin type Air Handling Units made of 43mm thick panels consisting pre coated G.I casing of thickness 0.8mm outside layer and 0.8mm inside layer with polyurethane foam(PUF) insulation factory injected between them by injection moulding machine, 2mm thick base frame at bottom, complete with blower section with Backward curve blower, blower suitable for static pressure as detailed below, mixing chamber for fresh and return air, 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 with outlet pipe dia of min 50mm, stainless steel (18G) drain pan with PUF insulation, 150 mm dia. dial type pressure gauges and industrial type thermometers at the inlet and outlet of coil, 2 nos of access doors on filter and fan section each, with lighting provision in filter and fan sections & limit switches interlocked with doors so that AHU turns off during access door opening, auto purge valve wherever required, necessary vibration isolation arrangement, necessary control cable for all wiring inside the unit etc. and having sufficient space to accomodate UVGI system etc. Complete as per technical specifications and of following capacities & specifications:

I) 112.5 TR Capacity, 45,000CFM a) Static pressure -80mm WC b) Cooling coil 6 Rows deep c) Filters with Filtration standard-90% efficiency down to 10 Microns d) Supply blowers with motors - 2 Nos e) Two way modulating valve with rotary type actuator-1 nos f) MS Y strainer-100mm dia-1 nos g) 25mm ball valve for inlet and outlet- 2 nos h) 150 mm dia. dial type pressure gauges- 2 nos. i) 150 mm dia industrial type thermometers-2 nos.

I) 60 TR Capacity, 24,000CFM a) Static pressure -80mm WC b) Rows deep-6 c) Filters with Filtration standard-90% efficiency down to 10 Microns d) Supply blowers with motors - 1 Nos e) Two way modulating valve with rotary type actuator-1 nos f) MS Y strainer-100mm dia-1 nos g) 25mm ball valve for inlet and outlet- 2 nos h) 150 mm dia. dial type pressure gauges- 2 nos. i) 150 mm dia industrial type thermometers-2 nos.

I) 37.5 TR Capacity, 15,000CFM a) Static pressure -80mm WC b) Rows deep-6 c) Filters with Filtration standard-90% efficiency down to 10 Microns d) Supply blowers with motors - 1 Nos e) Two way modulating valve with rotary type actuator-1 nos f) MS Y strainer-100mm dia-1 nos g) 25mm ball valve for inlet and outlet- 2 nos h) 150 mm dia. dial type pressure gauges- 2 nos. i) 150 mm dia industrial type thermometers-2 nos.

Supply of factory built floor mounted chilled water double skin type Treated fresh air Units made of 43mm thick panels consisting pre coated G.I casing of thickness 0.8mm outside layer and 0.8mm inside layer with polyurethane foam(PUF) insulation factory injected between them by injection moulding machine, 2mm thick base frame at bottom, complete with blower section with Backward curve blower, blower suitable for static pressure as detailed below, mixing chamber for fresh air, PVC drift eliminators, 6 row deep cooling coil section with aluminium finned copper tubes(tube thickness not less than 0.5mm), run around coil with refridgerant and suitable electronic expansion valves and thermostats, 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 with outlet pipe dia of min 50mm, stainless steel (18G) drain pan with PUF insulation, 150 mm dia. dial type pressure gauges and industrial type thermometers at the inlet and outlet of coil, 2 nos of access doors on filter and fan section each, with lighting provision in filter and fan sections & limit switches interlocked with doors so that unit turns off during access door opening, auto purge valve wherever required, necessary vibration isolation arrangement, necessary control cable for all wiring inside the unit etc. and having sufficient space to accomodate UVGI system etc. Complete as per specification and of following capacities & specifications:

I) 60 TR Capacity, 24,000CFM a)Chilled water Cooling coil 6 Rows deep b)Run around coil with refridgerant 3 rows deep c)Static pressure -80mmWC d)Filtration standard-90% efficiency down to 10 Microns e) Supply blower - 1 No f) Two way modulating valve with rotary type actuator-1 nos g) MS Y strainer-100mm dia-1 nos h) 25mm ball valve for inlet and outlet- 2 nos i) 150 mm dia. dial type pressure gauges- 2 nos. j) 150 mm dia industrial type thermometers-2 nos.

Installation, Testing & Commissioning of above AHU and TFA (item 2 & 3) of following capacity at basement of T1 and T4 on floor using necessary concrete blocks/cubes for successful operation complete as required.

45000 CFM AHU

24000 CFM AHU

15000 CFM AHU

24000 CFM TFAs

Carrying out all necessary and sufficient modification in the existing MS Chilled water piping to match with existing MS chilled water pipeline including welding, painting complete with all bends, flanges, unions, necessary MS angle/Channel supports etc. along with provision of insulation of pipelines with PUF of suitable size, vapour barrier, chicken mesh net, Aluminium cladding/cement concrete with paint including necessary modifications in drain pipeline inlcuding providing additional drain pipeline if required, provision for installation of BMS sensors in pipelines and ducts using suitable accessories, fixing of ball valves with MS pipe nipples in inlet and outlet pipes, dismantling and removing of old MS pipelines etc. complete as required. Old Pipelines from inlet and outlet control valves upto coil shall be replaced with new pipes.

45000 CFM AHU

24000 CFM AHU

15000 CFM AHU

24000 CFM TFAs

Supply, installation testing commissioning of factory fabricated GSS sheet steel metal round/rectangular ducting complete with neoprene rubber gaskets, elbows, splitter dampers, vanes, hangers, supports etc. as per specifications of following thickness

18 gauge

20 gauge

22 gauge

24 gauge

SITC of XLPE insulation, Class'O', of following thickness on duct, after applying suitable adhesive sealing all joints with self adhesive aluminium tape, including necessary cleaning of duct surface before insulation, complete etc. as per technical specification complete as required

25 mm thick

Supply and fixing of Canvass Connection made of fire retardant type cloth between AHU & Duct including GI connecting flange etc complete as required.

45000 CFM AHU Incomer - 1. 100A, 25 kA, 4P MCCB,-1 nos 2. Multifunction meter with energy reading- 1 nos Outgoing - 1. 63A, 4P MCCB, 25kA -2 set 2. 10A 2P MCB 10kA-1 set 2. Suitable capacity Variable Frequency Drive for 45000 CFM capacity AHU- 2 set 3. Potentiometer knob for manual speed control-2 set

24000 CFM AHU/TFA Incomer - 1. 100 A, 25 kA, 4P MCCB,-1 nos 2. Multifunction meter with energy reading- 1 nos Outgoing - 1. 63A, 4P MCCB, 25kA -1 set 2. 10A 2P MCB 10kA-1 set 2. Suitable capacity Variable Frequency Drive for 24000 CFM capacity AHU- 1 set 3. Potentiometer knob for manual speed control-1 set

15000 CFM AHU Incomer - 1. 100 A, 25 kA, 4P MCCB,-1 nos 2. Multifunction meter with energy reading- 1 nos Outgoing - 1. 63A, 4P MCCB, 25kA -1 set 2. 10A 2P MCB 10kA-1 set 2. Suitable capacity Variable Frequency Drive for 15000 CFM capacity AHU- 1 set 3. Potentiometer knob for manual speed control-1 set

Supply, installation, testing and commissioning of GI volume control duct damper of thickness 16 SWG frame and 16 SWG vanes complete with neoprene rubber gaskets, nuts, bolts, screws linkages, flanges etc, as per specifications.

SITC of UVGI lamps suitable for continuous operation having UV-C band having wavelength of 254nm+/-1 nm and sufficient irradiation intensity for germicidal irradiation of the entire AHU cooling coil face area alongwith all supporting structures, power and control panel, cabling, earthing, safety provisions etc as per the detailed technical specifications and complete as required.

Supply of following size XLPE PVC outer sheathed aluminium conductor armoured cable of 1.1kv grade as per IS 7098-1. 3 core 16 sqm Al cable

Laying and fixing of one number of XLPE cable of 1.1 kV grade of following size on existing cable tray or on surface as required. Upto 35 sqmm (clamped with 1mm thick saddles).

Supply and making end termination with brass compression gland and aluminium lugs for following size of XLPE aluminium cable of 1.1kV grade as required.

3x16 sqmm (25mm)

3.5x70 sqmm (38mm)

Providing and fixing 25mmx5mm copper strip on surface or in recess for earth connections.

Providing and fixing 6 SWG GI wire on surface or in recess for earth connections along with existing cable complete as required.

Supply of min 125 litres capacity jumbo desert air coolers suitable for operation on single phase AC supply and shall have low noise, lockable wheels for movement, 3 stage speed control switch, mode control switch, efficient honeycomb cooling pads, min 4500 CFM air capacity, auto louver movement etc. complete as required.

SNOWMEX ENGINEERS LIMITED (BID ID -910798)

HARCOMP AIRFLEX PVT. LTD. (BID ID -910971)

Mvac Engineers (BID ID -911683)

Bluestar Limited (BID ID -911577)