REPAIR/REPLACEMENT OF EXISTING AIR CONDITIONING SYSTEM

Amount

VARIABLE REFRIGERANT FLOW SYSTEM : (HEATING & COOLING)

Supply, Installation, Testing & Commisioning of Variable Refrigerant Flow type multi unit air-conditioning system complete with indoor and outdoor units with individual controller for cooling application as per the specifications and drawings. The quoted price should include clearances charges, local taxes, freight etc. VRF Shall have cut off arrangement after a particular set value of Supply air Temperature for AHUs. Quoted price shall also be inclusive of loading, unloading, lifting & shifting on terrace or other suitable locations as per drawing.

OUTDOOR UNITS

Supply, Installation, Testing & Commisioning of air cooled variable refrigerant flow modular type cooling application, each comprising of energy efficient multiple scroll compressors, full charge of R-410a refrigerant gas and all accessories as per the specifications. All compressors shall be inverter type. The condensing units shall be suitable to work on cooling as well as heating mode. The condensing units shall be suitable for operation on 415 ±10% volts, 50Hz, 3 phase AC power supply and complete with auto check function for connection error, auto address setting, etc. The outdoor units shall be low noise type. The unit shall be complete in all respects, inclusive of insulated copper refrigerant piping, drain piping of required size, electrical & microprocessor panel, wiring, control cabling and earthing, isolating valves, M.S Structures and supports with all other necessary accessories for proper functioning of the units. The cost of power distribution one incomer MCCB and two /three outgoing MCB shall be inculsive in offer.The outdoor units shall be of following capacities :1.All the refrigerant cicuits must have minimum COP of 3.8 @ 100 % Load and 7.1 @ 50 % load at cooling mode @ AHRI Conditions.

Quoted price shall be inclusive of factory applied epoxy coating (to prevent erosion of tubes & fins) of Outdoor units.

VRF ODUs shall be capable of operating in follwing range : i. For Cooling : (-)5degC to 50degC ii. For Heating : (-)20degC to 15.5degC

24HP nominal capacity outdoor unit comprising of 2 or 3 modules of requisite capacity.

AIR HANDLING UNITS (AHUs) : DX Floor Mounted AHUs with Thermal Break Profile & Mixing Chamber

Supply, Installation, Testing & Commisioning of DX type double skin air handling units (AHUs) each comprising of following as per the specifications :The unit shall be complete in all respects, inclusive of insulated copper refrigerant piping, drain piping of required size, electrical & microprocessor panel, wiring, control cabling and earthing, isolating valves, M.S Structures and supports with all other necessary accessories for proper functioning of the units.

Casing of air handling units shall be in double skin construction. Inner skin shall be constructed out of 24 gauge plain GS sheet & outer skin in 24 gauge pre-plasticized GS sheet sandwitched between 25mm thick injected PU foam insulation of density not less than 40 Kg /CuM and complete with inspection doors and marine light, limit switch including control wiring as required.

Fan section complete with backward curved DIDW type centrifugal fan/s, IP-55, IE3, TEFC squirrel cage induction motor suitable to operate on 415+10%V, 50Hz, 3 phase AC power supply and belt drive package. Fan outlet velocity shall not be more than 2000 FPM (10.16MPS).

Fan Motor shall be VFD compatible.

Coil section with multirows deep DX coil of copper tube & copper header and aluminium fins construction having wall thickness of tubes not less stainless steel duly insulated. Face velocity across

Pre-Filter section complete with 50mm thick washable synthetic fibre filters. Velocity across the filters shall not exceed 450 FPM. MERV-8 Standard

Fine filter section complete with 300mm thick fine filters. Velocity across fine filters shall not exceed 500FPM. MERV-14 Standard

AHUs shall be provided with mixing chamber with R/A & F/A openings as per approved shop drawing.

In addition to the above, air handling units shall be provided with adequate vibration isolation pads and fire retardent flexible canvass connections made out of canvass sleeve.

The Air Handling Units (AHUs) shall be of following duty parameters :

Supply air quantity : 7600Cfm

Refrigeration Load : 19.0 TR (Peak)

AHU as described above.

KIT and Remotes FOR AHUs/TFA

Supply, Installation, Testing & Commisioning of VRF Kits for AHUs having all controllers & Electonic Expansion Valve (EEV) and temperature set arrangment and remotes : For 24 HP

ELECTRICAL : Main HVAC Panel For Air-conditioning System

Supply, Installation, Testing and Commissioning of 415V, 3 Phase,50 Hz AC supply cubical type panels made out of 14 gauge CRCA structure, base channel, complete with, moulded case circuit breakers, meters, indicating lamps, current transformer etc., complete in all respects, insulated bus bars with heat shrinkable PVC sleeve in suitable bus chambers , interconnection, small wiring, name plate, danger plate, earth bus etc. & comprising of compartments with hinged door for each feeder & its accessories, cable alley with hinged doors, bus chamber with bolted door etc. The panel being of dust & vermin proof construction with rubber gasket attractively powder coating etc. The panel shall be free standing type / wall mounted type as per relevant drawing and comprising with the following: Incoming-1 no. 630A 4P MCCB with Volt Meter & required CTs, indications, operating handle with door interlock, spreader links and phase barrier, solid neutral link and accessories as required

Outgoing- Following Outgoings with thermal magnetic-based releases (except specified anywhere). 3 Nos. Suitable 63 Amp MCCB for 3 nos. AHU 1 Nos. 25 Amp TP MCCB for TFA 5 No 63 Amp TP MCCB & 63 AMP 300mA ELCB for VRF ODU System

Panel with all specifcations as mentioned above.

RCBO with BOX for Outdoor VRF System

Distribution Panel for above AHU

Starter Unit

COPPER REFRIGERANT PIPING-FOR VRF

Supply, Installation, Testing & Commissioning of high pressure copper refrigerant piping of suitable size as required and duly insulated with19mm/13mm thick Nitrile insulation . External Refrigerant piping shall be laid on GI covered cable trays. Piping inside occupied spaces shall be supported using MS hangers duly painted with black enamel paint. Entire refrigerant piping work shall be carried out in accordance with the specifications.MS sleeves of requisite size shall be provided at wall crossing. Piping shall be of following sizes :

Pipe Size (O.D.) -34.9 mm, Thickness of CSE( Insulation) - 19 mm

Pipe Size (O.D.) -28.6 mm, Thickness of CSE( Insulation) - 19 mm

Pipe Size (O.D.) -15.9 mm, Thickness of CSE( Insulation) - 13 mm

FITTINGS

Installation,Testing & Commissioning of following imported copper fittings to be provided in refrigerant pipe line : Outdoor Connecting Units

Cable/Pipe Tray

Providing and fixing of cable/pipe tray for running refrigerant piping and cable alongwith control wiring etc. tray should be properly clamped and hang with all connected accessories and it should be of following sizes : 300 x 50 x 2 mm (Thickness)

CONDENSATE DRAIN PIPING -PVC

Supply, Installation, Testing and Commissioning of PVC pipes cut to required lengths and installed for condensate drain. Quoted price shall be inclusive of supply and fixing in position the necessary fittings like elbows, tees reducers etc. and supporting arrangement in accordance with the approved shop drawings and specifications. Pipes shall be insulated with 6mm thick XLPE polythylene/Nitrile Rubber insulation . Pipes shall be of following sizes : 40mm dia

CONTROL & TRANSMISSION WIRING

Supply, laying, affecting connections and Testing of the following sizes of control cum transmission wiring to be laid in MS conduits between indoor units and outdoor units.

For VRF /VRF

For Remote

GAS CHARGING

Supply & Charging of additional refigerant gas in air conditioning unit : R 410A

Pressure Testing

Supply & Testing Nitrogen Gas Testing for the Copper Refrigerant Pipe Line : VRF/VRF System copper pipe line

DUCT WORK/AIR TERMINALS : SITE/FACTORY FABRICATED DUCTING

Supply, Fabrication, Installation and Testing of sheet metal ducts complete with vanes, splitter dampers, hanging arrangement GRIPPLE including check nuts in accordance with the approved shop drawings and specifications. Galvanised sheet metal ducts as per SMACNA standard in accordance with the approved shop drawings and specifications. Ducts shall be fabricated using lock forming machine.

FLEXIBLE CANVASS CONNECTIONS

Supply, Installation , Testing of antivibration flexible joints at the outlet of AHU/TFA. Flexible connections shall be constructed using imported fire retardant fabric DOUBLE with extruded aluminium frame/flange on both sides of approved make.

LINEAR GRILLES

Supply, Installation , Testing and Balancing of one way blow linear supply cum return air grilles complete with fixed core as per approved shop drawings and specifications. The grilles shall be of approved colour & shade : Powder coated aluminium grilles of extruded sections with integral flanges on both sides & ends as required complete with corner pieces.

100/150/250 mm High grilles

Supply, Installation and Testing of GI box type volume control dampers as per the specifications and shop drawings.

Supply, Installation and Testing of GI multi blade type collar dampers as per the specifications and shop drawings.

Supply, Installation and Testing of non return dampers. NRDs to be installed in the ducts as per the specifications and shop drawings. Sample of NRDs to be got approved

Supply, Installation, Testing & Commissioning of extruded Aluminum section 600 x 600 mm size Supply air grid diffuser with appropriate neck size and damper

Supply, Installation, Testing & Commissioning of extruded Aluminum section 600 x 600 mm size Supply air grid diffuser with appropriate neck size and damper

MS Fabrication Work

INSULATION : ACOUSTIC LINING OF DUCTS

Supply and Application of internal acoustic lining of supply air ducting using open cell nitrile rubber insulation with density within 140-180 Kg/m3 as per the approved shop drawings and specifications. Insulation material shall be bonded with the ducts using metal screw and washers to facilitate grip to the GI sheet : 10mm thick lining

THERMAL INSULATION OF DUCTS

Supply and Application of external thermal insulation of supply /return air ducting using XLPE polythylene / nitrile rubber insulation with proper adhesive as per the specifications and drawings : 9mm thick insulation

THERMAL INSULATION FOR EXPOSED DUCTS

Supply and Application of XLPE polythylene / nitrile rubber insulation with same specifications as mentioned above & Starbond with UV protection paint for ducts exposed to atmosphere as per specifications.

19mm thick insulation-For Return Air

25mm thick insulation-For Supply Air

DISMANTLE WORK

Dismantling of existing GI duct, Chiiled pipes, AHU, Compressors, thermal insulators, Grills and other items

CIVIL WORK

Providing and fixing in position wall panelling at all heights with integral densified calcium silicate panels/tiles of size 595 x 595 mm, having NRC (Noise Reduction coefficient) of 0.50 (minimum) as per IS 8225:1987, Light reflectance of 85% (minimum). Non combustible as per BS:476 (part-4), fire performance as per BS:476 (part 6 &7), humidity resistance of 100%, thermal conductivity <0.043 W/m K as per ASTM 518:1991, comprising of a frame made from especially fabricated galvanised mild steel sheet 0.50 mm thick pressed section (galvanizing @120 grams per sqm including both sides) i.e.vertical studs of size 48 x 34 x 36 mm are placed at 600 mm centre to centre in a floor and ceiling channel section of size 50 x 32 mm fixed to the floor and soffit at 600 mm centre using 12 mm dia,50 mm long wedge type expanded zinc alloy dash fastner with 10 mm bolt. This same channel is then to be fixed in horiziontal direction at 600 mm centre to centre so as to form a grid of 600 mm x 600 mm. Glasswool of 50 mm thickness is then to be inserted in the slots and finally calcium silicate non combustible panels/tiles are to be screw fixed with self tapping pan head nickel coated mild steel screws of size 13 x 3.2 mm on to this grid leaving an even groove of 1 mm between the panels. The joints between the panels are to be duly jointed and finished using recommended jointing calcium silicate based compound and fiber joint tape roll 50 mm wide (90 metre )roll and two coats of primer suitable for panelling as per manufacturer’s specification as per direction of Engineerin- Charge all complete.

With 15 mm thick fully perforated square/butt edge light weight calcium silicate panels/ tiles

Providing & fixing false ceiling at all heights with GRG (Glass Fibre Reinforced Gypsum) false ceiling tiles of Size 595x595 mm of approved texture, design and patterns having moisture content less than 2%, humidity resistance of 99%, NRC0.50 to 0.75 as per IS 8225:1987, Non combustible as per BS 476 (part 4)-1970 and light reflectance of 85% (minimum) to be laid in true horizontal level suspended on inter-locking metal T-Grid of hot dipped galvanised iron section of 0.33 mm thick(galvanized @ 120 gram per sqm including both sides) comprising of main-T runners of size 15x32 mm of length 3000 mm, cross - T of size 15x32 mm of length 1200 mm and secondary intermediate cross-T of size 15x32 mm of length 600 mm to form grid module of size 600 x 600 mm, suspended from ceiling using galvanised mild steel items (galvanizing @ 80 grams per sqm) i.e. 50 mm long, 8 mm outer diameter M-6 dash fasteners, 6 mm dia fully threaded hanger rod upto 1000 mm length and L-shape level adjuster of size 85x25x2 mm. Galvanised iron perimeter wall angle of size 24x24x0.40 mm of length 3000 mm to be fixed on periphery wall / partition with the help of plastic rawl plugs at 450 mm center to center and 40 mm long dry wall wood screws. The work shall be carried out as per specifications, drawing and as per directions of the Engineer-in-Charge.

With fully perforated 12 mm thick micro tegular edged or 10 mm thick square edged GRG false ceiling tiles.

Providing & fixing of 25 mm thick wooden wool sound proof board pasted with fabric acoustic panels made of fabric of approved sample fixed over 25 mm thick non termite board panel including backing foam of approved sample, the panel fixed to GI framing of required section , cost to include finishing of shadow gap, stitching of fabric, adhesive, nails, screws, making of groove, making provision of MEP fixtures and all necessary fixing arrangements etc.

Replacement of old and spoiled wall panelling and Providing fixing and finishing 2" GI structured new wooden designer / wooden blank with grooves wall panelling placed above 50 mm glass Sound proof wool and required finishing ( Colour and design will be decided by concern )

ELECTRICAL WORKS

Supplying and fixing of following sizes of medium class PVC conduit along with accessories in surface/recess including cutting the wall and making good the same in case of recessed conduit as required : 25 mm

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 required.

2 X 1.5 sq. mm + 1 X 1.5 sq. mm earth wire

2 X 2.5 sq. mm + 1 X 2.5 sq. mm earth wire

2 X 4 sq. mm + 1 X 4 sq. mm earth wire

Supplying and fixing following modular switch/ socket on the existing modular plate & switch box including connections but excluding modular plate etc. as required.

5/6 A switch

15/16 A switch

3 pin 5/6 A socket outlet

6 pin 15/16 A socket outlet

Supplying and fixing following size/ modules, GI box alongwith modular base & cover plate for modular switches in recess etc. as required.

3 Module (100mmX75mm)

6 Module (200mmX75mm)

8 Module (125mmX125mm)

Supplying and fixing 3 pin, 5 A ceiling rose on the existing junction box/ wooden block including connections etc. as required.

Installation, testing and commissioning of pre-wired, fluorescent fitting / compact fluorescent fitting of all types, complete with all accessories and tube/lamp etc. directly on ceiling/ wall, including connections with 1.5 sq. mm FRLS PVC insulated, copper conductor, single core cable and earthing etc. as required.

Supplying and fixing following way, single pole and neutral, sheet steel, MCB distribution board, 240 V, on surface/ recess, complete with tinned copper bus bar, neutral bus bar, earth bar, din bar, interconnections, powder painted including earthing etc. as required. (But without MCB/RCCB/Isolator) : 8 way , Double door

Supplying and fixing 5 A to 32 A rating, 240/415 V, 10 kA, "C" curve, miniature circuit breaker suitable for inductive load of following poles in the existing MCB DB complete with connections, testing and commissioning etc. as required.

Single pole

Double pole

Supplying and fixing 20 A, 240 V, SPN Industrial type socket outlet, with 2 pole and earth, metal enclosed plug top alongwith 20 A "C" curve, SP, MCB, in sheet steel enclosure, on surface or in recess, with chained metal cover for the socket out let and complete with connections, testing and commissioning etc. as required.

Concealed Ceiling Light LED 5" x 30 W bluetooth lights warm to cool with acc ISI

NOTE:- All items to be used in this work should be branded and ISI certified or CPWD approved list of material may be followed. If any make is not specified, decision of Engineer-in-charge shall be final and binding.

K M H-VAC SYSTEM (BID ID -3121823)