Replacement of old air handling units (AHUs) in the HVAC SYSTEM installed at various locations of the Regional Cancer Centre

Air Handling Units

Supply, Installation, testing & commissioning of the AHU's as per specification including all accessories. VFD and control panel all to form the integral part of AHU and to be supplied by the AHU manufacture itself. VFD driven AHU with plug fans and VFD starter panel / controller with all necessary connections with pressure / Temperature sensors (minimum 2 nos.) required to control the VFD Speed. Power & Control wiring from VFD to AHU to be included. Only HVAC application VFD's shall be used. The VFD should be incorporated with RFI (radio frequency interface) filters which can control THDi [Total Harmonic Distortion Current] below 5%, auto bypass starter compactable to the third party BMS. <br>Pre- Plasticised Sheet/ powder coated, Extruded Aluminium panta post frame work, Fan section, coil section, filter section, with necessary Insulations, drain pan, etc. Cooling coil of copper tubes and aluminium fins (min. 10 fins per inch) and required number of rows deep.TEFC sq.cage induction motor of required rating including mounting and fixing arrangements, IE3 Motor Plug fan with VFD Drives anti vibration springs/isolator bearings etc. Limit switch in door and inspection lamps to be fixed.Insulation of all section with fire retardant insulation material as per manufacture’s standard. Air vent on cooling coil with globe valve/screwed plugs. Insulation of Drain pan as per specifications. Double canvas connections of fire retardant quality for connecting AHU's to ducting/plenum. Insulated drain piping with trap till the out let of the AHU. Balance will be measured in the chilled water piping. Heater bank coming along with AHU‘S should comprise of thermostat, humidistat, safety thermostat, contactors, Controls & control Wiring etc rate to be included in the AHU costing itself. Also all the AHU should have space to accommodate heater banks<br>Thermostat: Thermowell at the inlet and outlet of cooling coils, gauge cocks at the inlet and outlet of coiling coils for pressure gauges (only provision) duct damper including Control wiring to make M/V in close position while AHU is OFF with relays etc.<br>AHU having Static 55 MM Static and fine filter efficiency 99.9% down to 5 micron. 10 mm thick synthetic media filter with frame 90% efficiency down to 20 micron. <br>All AHU’s will be given only one power input cable. Any looping should be done by OEM in case of multiple motors in one AHU. Lockable off push button to be provided near AHU if machine is 3mtrs and above far from respective pannel board to be included in the AHU cost.<br>Including R.C.C foundation along with PCC/RCC sub base with bolts and nuts and finishing the slabs or any opening etc. good as same<br>Double Skin ceiling suspended unit with fine filter and mixing box<br>4 TR 1600 Cfm, 3.2 Sq.ft/ 4 Row

4 TR 1600 Cfm, 3.2 Sq.ft/ 4 Row

Supply, Installation, testing & commissioning of factory built floor mounted chilled water double skin type horizontal/vertical air handling units made of 40 mm thick sandwitched panels with polyurethane foam (PUF) insulation, complete with Plug type fan, VFD driven electric motor, coil section, filter section, drain pan, VFD etc. The Cooling coil is of copper tubes (tubes thickness not less than 0.5 mm) and aluminium fins (min. 10fins per inch) of 6 rows deep. Filter section with 50 mm thick metal viscous/washable synthetic type air pre-filters efficiency 80% down to 10 micron. TEFC sq. cage induction motor suitable for 415 ± 10% volts, 50Hz, 3 Phase AC supply including mounting and fixing arrangements, IE3 Motor Plug fan with VFD Drives anti vibration springs/isolator bearings etc., drain connections, stainless steel (18G) drain pan with PUF insulation. Double canvas connections of fire retardant quality for connecting AHU's to ducting/plenum. Limit switch in door and inspection lamps to be fixed. Insulation of all section with fire retardant insulation material as per manufacture’s standard. Air vent on cooling coil with globe valve/screwed plugs. 150 mm dia. dial type pressure gauges (2 nos.) and industrial type thermometers (2 nos.) at the inlet and outlet of coil, Control wiring to make M/V in close position while AHU is OFF with relays, necessary vibration isolation arrangement etc.<br>VFD and control panel all to form the integral part of AHU and to be supplied by the AHU manufacture itself. VFD driven AHU with plug fans and VFD starter panel / controller with all necessary connections with pressure / Temperature sensors (minimum 2 nos.) required to control the VFD Speed. Power & Control wiring from VFD to AHU to be included. Only HVAC application VFD's shall be used. The VFD should be incorporated with RFI (radio frequency interface) filters which can control THDi [Total Harmonic Distortion Current] below 5%, auto bypass starter compactable to the third party BMS.<br>All AHU’s will be given only one power input cable. Any looping should be done by OEM in case of multiple motors in one AHU. Lockable off push button to be provided near AHU if machine is 3mtrs and above far from respective panel board to be included in the AHU cost etc. complete as per specification including all accessories as specified and as required. and of following capacities.<br>External Static Pressure for AHU's with fine filters is 50 MM Static

15 TR, 6000cfm

20 TR, 8000cfm

30 TR, 12000cfm

Supply, Installation, testing & commissioning of factory built floor mounted chilled water double skin type horizontal/vertical air handling units made of 46 mm thick sandwitched panels with polyurethane foam (PUF) insulation, complete with Plug type fan, VFD driven electric motor, coil section, mixing box, filter section, drain pan, Heater banks, VFD etc. The Cooling coil is of copper tubes (tubes thickness not less than 0.5 mm) and aluminium fins (min. 10fins per inch) of 6 rows deep. Mixing box with Aluminium Aerofoil SA,RA damper, Al Aerofoil fresh air damper with fresh air, filter section with prefilters and micro filters, Prefilter with efficiency 80% down to 20 micron, fine filter section with efficiency 95% down to 5 micron. TEFC sq. cage induction motor suitable for 415 ± 10% volts, 50Hz, 3 Phase AC supply including mounting and fixing arrangements, IE3 Motor Plug fan with VFD Drives anti vibration springs/isolator bearings etc., drain connections, stainless steel (18G) drain pan with PUF insulation. Double canvas connections of fire retardant quality for connecting AHU's to ducting/plenum. Limit switch in door and inspection lamps to be fixed. Insulation of all section with fire retardant insulation material as per manufacture’s standard. Air vent on cooling coil with globe valve/screwed plugs. 150 mm dia. dial type pressure gauges (2 nos.) and industrial type thermometers (2 nos.) at the inlet and outlet of coil, Control wiring to make M/V in close position while AHU is OFF with relays, necessary vibration isolation arrangement etc.<br>Heater bank coming along with AHU‘S should comprise of thermostat, humidistat, safety thermostat, contactors, Controls & control Wiring etc. rate to be included in the AHU costing itself. Also all the AHU should have space to accommodate heater banks, heater capacity 3 x 2 KW, Thermal break<br>VFD and control panel all to form the integral part of AHU and to be supplied by the AHU manufacture itself. VFD driven AHU with plug fans and VFD starter panel / controller with all necessary connections with pressure / Temperature sensors (minimum 2 nos.) required to control the VFD Speed. Power & Control wiring from VFD to AHU to be included. Only HVAC application VFD's shall be used. The VFD should be incorporated with RFI (radio frequency interface) filters which can control THDi [Total Harmonic Distortion Current] below 5%, auto bypass starter compactable to the third party BMS.<br>All AHU’s will be given only one power input cable. Any looping should be done by OEM in case of multiple motors in one AHU. Lockable off push button to be provided near AHU if machine is 3mtrs and above far from respective panel board to be included in the AHU cost etc. complete as per specification including all accessories as specified and as required. and of following capacities.<br>External Static Pressure for AHU's with fine filters is 55 MM Static<br>10 TR 4000cfm

10 TR 4000cfm

15 TR 6000cfm

Chilled water line

Site fabricated pipe with PUF insulation & GI cladding for pipe AHU room area & valve insulation with openable boxing for inspection. The Pipes of sizes 150mm & below shall be M.S. ‘C’class as per IS : 1239 and pipes size above 150 mm shall be welded black steel pipe heavy class as per IS: 3589, from minimum 6.35mm thick M.S. Sheet for pipes upto 350 mm dia. and from minimum 7mm thick MS sheet for pipes of 400 mm dia and above

80mm dia. (50mm thick insulation)

65mm dia. (50mm thick insulation)

50mm dia. (50mm thick insulation)

40mm dia. (50mm thick insulation)

32mm dia. (50mm thick insulation)

25mm dia. (50mm thick insulation)

Cooling Thermostat

Supply, installation, testing and commissioning of cooling thermostat shall be electronic room temperature controller with digital display temp & fan speed control, capable of providing individual space temperature control for cooling application. The controller shall produce a dual output to cooling coils in response to load change in rooms.

Thermostat for AHUs

Drain Piping

Supply and fixing in position of condensate drain water & indoor unit drain to the floor trap PVC piping with 9mm thick nitrile rubber insulation and with necessary fittings like elbows, tees and reducers etc. Openings as good as same

40 mm dia

32 mm dia

25 mm dia

Valves

Butterfly Valves

Supplying, fixing, testing and commissioning of following butterfly valve in the chilled water plumbing duly insulated to the same specifications as the connected piping and adequately supported as per specifications. BUTTERFLY VALVE (MANUAL) with C I body SS Disc, Nitrile Rubber Seal & O- Ring PN 16 pressure rating for chilled water circulation as specified.

80 mm dia

65 mm dia

50 mm dia

40 mm dia

32 mm dia

Ball Valves

Providing and fixing ball valve (brass) of approved quality, High or low pressure, with plastic floats complete .

25 mm dia

20 mm dia

Y-strainer

Supplying, fixing, testing and commissioning of following valves, strainers, gauges in the chilled water plumbing duly insulated to the same specifications as the connected piping and adequately supported as per specifications.Y- Strainer of Ductile CI Body flanged ends with stainless steel strainer for chilled/hot water circulation including insulation as specified

40 mm dia

32 mm dia

25 mm dia

Pressure Gauge

Providing and fixing in position the industrial type pressure gauges with gun metal / brass valves complete as required .

Temperature gauge

Providing & fixing in position the mercury in glass industrial type thermometers.

Auto Air vent including Ball Valves

Supply & install of airvents / purge valves at the highest points in chilled water piping complete each floor with pipes nipple welded to pipe, hex nipple, socket, U-pipe connection at outlet of air vent etc. as required.

Pressure independent cum balancing Valves

Supply, Installation, Testing and Commissioning of following sizes electronic, selfbalancing, pressure independent type dynamic balancing valve with integrated 2 way modualating control valves in a single body. The actuator shall be capable of accepting upto 1 OV DC and upto 20mA electric signal and shall provide similar transduced feedback output to control system. Maximum close off pressure shall not be less than 6 Bar for upto 50 mm valves and not be less than 7 Bar for 65 mm & above. Valves should have pressure rating of 25 Bar minimum.

40 mm DIA

32 mm DIA

25 mm DIA

Ducting, Grills, Diffusers and Insulation

Supply, Installation, balancing and commissioning of fabricated at site GSS sheet metal rectangular ducting complete with neoprene rubber gaskets, elbows, splitter dampers, vanes, hangers,supports, etc as per approved drawings and specifications of following sheet thickness complete as required.Site fabricated GSS sheet metal rectangular ducting as per IS 655-2006

Thickness 0.63 mm sheet

Thickness 0.80 mm sheet

Thickness 1.00 mm sheet

Thickness 1.25 mm sheet

Grills and Diffusers

Supply, Insulation, testing and commissioning of GI volume control duct damper complete with neoprene rubber gaskets, nuts, bolts, screws linkages, flanges etc, as per specifications. GI volume control duct damper

Supplying, Fixing, testing and commissioning of fire dampers in supply air duct/ main branch and return air path as and where required of required sizes i/c control wiring, the damper shall be motorized and spring return so as to close the damper in the event of power failure automatically and open the same in case of power being restored. The spring return action shall be inbuilt mechanism and not externally mounted. The damper shall also be closed in the event of fire signal complete as required and as per specifications.Fire damper

Factory made fresh air dampers with louvers and control lever.

Underdeck Insulation

supply & fixing of 12 mm thick class o nitrile rubber insulation with adhesive as per the recommendation of the manufacture with density 45-55kg/m3

Acoustic Insulation

Supply & fixing of acoustic lining 15 mm thick with insulation with adhesive as per the recommendation of the manufacture with density 140-180kg/m3

Duct Insulation

Supplying and fixing of following thickness duly laminated aluminum foil of mat finish closed cell Nitrile rubber (Class "O") insulation on existing duct after applying suitable adhesive for Nitrile rubber. The joints shall be sealed with 50 mm wide and 3 mm thick self adhesive nitrile rubber tape insulation complete as per specifications and as required. 19 mm thickness

Supply & fixing of 10 mm thick class O acoustic nitrile rubber insulation with adhesive as per the recommendation of the manufacture with density 140-180kg/m3

Electrical Work

Wiring for circuit/ submain wiring alongwith earth wire with the following sizes of FRLS PVC insulated copper conductor, single core cable in surface / recessed medium class PVC conduit as required4 X 6 sq. mm + 2 X 6 sq. mm earth wire

Wiring for circuit/ submain wiring alongwith earth wire with the following sizes of FRLS PVC insulated copper conductor, single core cable in surface / recessed medium class PVC conduit as required4 X 10 sq. mm + 2 X 6 sq. mm earth wire

Wiring for circuit/ submain wiring alongwith earth wire with the following sizes of FRLS PVC insulated copper conductor, single core cable in surface / recessed medium class PVC conduit as required4 X 16 sq. mm + 2 X 6 sq. mm earth wire

Buy back AHU

Buy back value for the following existing old AHUs, chilled water piping and accessories including dismantling and other labour charges. <br>Note: The equipments and connected piping to be disconnected from the live system without affecting air-conditioning in other areas. It should be carried out at the own risk of the contractor<br>10 TR floor mounted AHUs with connected piping and accessories-01 nos.

Buy back value for the following existing old AHUs, chilled water piping and accessories including dismantling and other labour charges. <br>Note: The equipments and connected piping to be disconnected from the live system without affecting air-conditioning in other areas. It should be carried out at the own risk of the contractor<br>15 TR floor mounted AHUs with connected piping and accessories-01 nos

Buy back value for the following existing old AHUs, chilled water piping and accessories including dismantling and other labour charges. <br>Note: The equipments and connected piping to be disconnected from the live system without affecting air-conditioning in other areas. It should be carried out at the own risk of the contractor<br>20 TR floor mounted AHUs with connected piping and accessories-01 nos.

Buy back value for the following existing old AHUs, chilled water piping and accessories including dismantling and other labour charges. <br>Note: The equipments and connected piping to be disconnected from the live system without affecting air-conditioning in other areas. It should be carried out at the own risk of the contractor<br>30 TR floor mounted AHUs with connected piping and accessories-01 nos.