VRV/VRF Type AC Works

Variable Refrigerant Volume/Flow System

Supplying, Installation, Testing & Commissioning of Modular type Variable Refrigerant Flow/Variable Refrigerant Volume air cooled Outdoor units suitable for cooling/heating having 100% hermetically sealed inverter type twin Rotary/Scroll Compressor(s),minimum two compressors (with individual separate PCB) for above14HP modules, microprocessor based Controller, top discharge type condensing unit(s), with R-410-A Refrigerant or equivalent, vibration Isolators with suitable foundation etc. complete as required. To have better efficiency condensor fan shall be capable to operate at different speed with respect to load.The unit shall deliver the rated capacity and in confirmation as per IS 18728:2024 and CPWD Specifications and work even at 50°C ambient temperature without tripping. The system shall be able to deliver 100% of the rated capacity upto 39°C. The unit shall be suitable to work on 400V +/- 10%, 3 Phase, 50Hz AC power supply and BMS compatible. The unit shall be filled with first charge of the refrigerant and ready for use as required. The condenser should be coated with a hydrophilic film to prevent water accumulation on the surface of the heat exchanger, enhance water dispersion, and reduce the risk of degradation, thereby improving overall performance and durability. The Indian Seasonal Energy Efficiency Ratio (ISEER) of the unit shall be as per Energy Conservation and Sustainable Building Code (ECSBC) 2024 as below and complete as per CPWD specification, connections, inter connections etc. as required. (For capacity <40 kWr ISEER 6.4, Capacity > 40 and <70 ISEER 6.5, Capacity > 70 ISEER 6.6 for ECSBC+ Building.

Outdoor Unit (Make - Daikin/ Hitachi/ Toshiba)

Indoor Units (Make - Daikin/ Hitachi/ Toshiba)

Cassette Unit

Supplying, Installation, Testing and Commissioning of following minimum capacity 4 way Cassette Type Indoor ceiling mounted unit equipped with synthetic washable media pre-filter, fan section with low noise fan/dynamically balanced blower, multispeed motor, coil section with DX Copper coil, electronic expansion valve, outer cabinet,drain pump, grill, necessary supports, vibration Isolation,Corded remote control etc., suitable for operation on single phase 230 V ± 10%, 50Hz AC supply, complete, as required. The Indoor units must shut down upon receiving a singal from the BMS System/Fire Singnals. The system shall be capable to adjust air flow as per room requirement in auto mode. The cooling capacity of indoor unit will be at air inlet conditions of 27 C WB temperature.

Hi-Wall Unit

Supplying, Installation, Testing and Commissioning of following minimum capacity High wall type Indoor unit equipped with and comfort washable synthetic media pre filter, fan section with low noise fan/dynamically balanced blower, multispeed motor, coil section with DX copper coil, electronic expansion valve, outer cabinet, cord less remote control, drain pan, necessary accessories etc., suitable for operation on 230 V ± 10%, 50 Hz, single phase AC supply, complete as required. The Indoor units must shut down upon receiving a singal from the BMS System/Fire Singnals. The system shall be capable to adjust air flow as per room requirement automatically. The cooling capacity of indoor unit will be at air inlet conditions of 27 0C DB and 19 0C WB temperature. (Make will be same as of Outdoor)

Supplying, Installation, Testing and Commissioning of Y/T/Multi Joints. Joints shall be of same Original Equipment Manufacturer (OEM)

Indoor Unit

Outdoor Multi Joints

Corded/ Cordless remote controls

Drain Pumps for Hi Wall Unit

Providing & fixing of drain pumps for Hi Wall of required capacity complete in all respect.

Inline Fans

Supply, installation, testing and commissioning of inline cabinet/ circular type of GI/ Tough Reinforced plastic construction complete with centrifugal fan with motor, drive, canvass connection at inlet & outlet complete with MCB panel with cabling and earthing (with 5 Rm). Fan shall be suitable for operation on 220 ± 10 volts, 50 Hz, single Phase AC power supply. All single phase inline fans shall be provided with factory filled speed regulation and as per specification and drawings. (Make - Ostberg/ Airflow/ Caryaire/ Sphere)

800 CFM, 15 mmwg SP(with pre filters)

550 CFM, 15 mmwg SP(with pre filters)

250 CFM, 10 mmwg SP(with pre filters)

Refrigerant Piping (VRV)

Supplying, Installation, testing and commissioning including vaccumiazation and Nitrogen testing of following nominal sizes of soft/hard drawn copper refrigerant piping for VRV/VRF system,complete with fittings, with suitable adjustable ring type hanger supports, jointing/brazing including accessories, insulated with XPLE Class-O tubular insulation/with Class-O closed cell elastometric nitrile rubber tubular sleeves sections of 19 mm thick insulation as given below for Suction and Liquid lines, all accessories as per specifications etc. as required : (Make - Mandev/ Maxflow/ Mehta Tubes/ Indigo)

6.4 mm O.D.(insulation : 19 mm)

9.5 mm O.D.(insulation : 19 mm)

12.7 mm O.D.(insulation : 19 mm)

15.9 mm O.D.(insulation : 19 mm)

19.1 mm O.D.(insulation : 13 mm)

22.2 mm O.D.(insulation : 13 mm)

28.6 mm O.D.(insulation : 13 mm)

34.9 mm O.D.(insulation : 13 mm)

41.3 mm O.D.(insulation : 13 mm)

Drain Piping

Supply, installation testing & commissioning of rigid UPVC piping running in ceiling/ floor complete with fittings, supports as per specifications and duly insulated with 9 mm thick closed cell nitrile rubber insulation with UV protection coating. (Make - Prince/ Supreme)

25 mm dia

32 mm dia

40 mm dia

G.I. Sheet Metal Ducting (Rectangular)

Supplying, installation, balancing and commissioning of factory fabricated GSS sheet metal rectangular/round ducting complete with neoprene rubber gaskets, elbows, splitter dampers, vanes, hangers,supports, bends, transitions, reducers, end caps,collars etc as required complete in all respect in confirmation to IS : 655 and approved drawings and specifications of following sheet thickness complete as required (Make - Ductofab/Zeco/Crystal) (Sheet Make - Tata/Jindal)

Thickness 0.63 mm (24 Gauge) (0-750 mm)

Thickness 0.80 mm (22 Gauge) (751-1500 mm)

Duct Acoustic

Supply and fixing of acoustic lining of supply air duct and plenum with 25 mm thick resin bonded glass wool having density of 32 kg/m3, with 25 mm X 25 mm GI section of 1.25 mm thick, at 600 mm centre to centre covered with Reinforced Plastic tissue paper and 0.5 mm thick perforated aluminium sheet fixed to inside surface of ducts with cadmium plated nuts, bolts, stick pins, CPRX compound in confirmation to SMACNA/IS and as per specifications complete etc.as required. (Make: UP Twiga/Saint Gobain/Owen Corning)

Grilles / Diffuser

Supplying, Fixing, installation, testing and commissioning of powder coated extruded aluminium Supply Air Grills with aluminium volume control dampers in confirmation to SMACNA/IS and as per specifications complete etc. as required. (Make : Mapro/Conaire/Caryaire/Cross air/Balance Air Equipment)

Supplying & fixing of powder coated extruded aluminium Return Air Grills with louvers but without volume control dampers complete in confirmation to SMACNA/IS and as per specifications complete etc.as required. (Make : Mapro/Conaire/Caryaire/Cross air/Balance Air Equipment)

Louvers

Supply & installation of louvers & bird screen as per specifications and drawings. (Make - Caryaire/ Mapro/ Balance Air/ Cynor/ Conaire)

Volume Control Damper

Supplying, installation, testing and commissioning of GI volume control duct damper complete with neoprene rubber gaskets, nuts, bolts, screws linkages,flanges etc in confirmation to SMACNA/IS and as perspecifications complete etc. as required. (Make : Air flow/Conaire/Caryaire/Balance Air Equipment)

Control & Transmission Wiring

Supply & Installation of shielded type control cum transmission wiring of 2C X 1.5 sqmm copper in suitable PVC conduits between indoor units and outdoor unit. (Make - Havells/ Polycab/ Rallison)

Controller Wiring

Supply, installation of shielded type control wiring of 3C X 1.0 sqmm copper cable between indoor units and their wired remote in suitable PVC conduits as required. (Make - Havells/ Polycab/ Rallison)

Power Cabling

Supplying, laying, testing of 1.1 KV grade multicore aluminium/copper conductor XLPE insulated & PVC sheathed armoured power cable on surfac or through existing cable tray or on cable tray including termination, cable joint & joints with solder lugs, crimping lugs, double compression brass glandsetc. complete as required.as per IS:7098 (part-1) (Make - Havells/ Polycab/ Skytone)

3C - 6 sqmm(copper)

3C - 10 sqmm(copper)

ELCB/ Isolator

Supply & fixing of following rating weather proof IP-65 endosure isolators/ ELCB with all accessories as required for following as per specifications, standards & requirement. (Make - ABB/ Siemens/ Havells)

For (22HP,20HP,14HP & 6HP) Outdoor Unit

Cable Tray/ Pipe Tray

Supplying and installing following size of perforated painted with powder coating M.S. cable trays with perforation not more than 17.5%, in convenient sections, joined with connectors, suspended from the ceiling with M.S. suspenders including bolts & nuts, painting suspenders etc. as required. (Make - Feders Lloyd/MEM/Rico)

150 mm width X 50 mm depth X 1.6 mm thickness

200 mm width X 50 mm depth X 1.6 mm thickness

Earthing

Supply and laying of double earthing continuity conductors of G.I. /G.S.S between panel boards and equipments as drawings.

Providing and fixing 6 SWG dia G.I. wire on surface or in recess for loop earthing as required.