Replacement of HVAC System installed in Admin Block at CSIR-NIIST Campus, Trivandrum

Dismantling & shifting of Horizontal Mount AHUs with condensing units of two nos etc. complete from the second floor /terrace of the library admin block to the scrapyard in the NIIST Campus.

SITC of 16.5 TR AHU Systems with following Specifications:

Supplying, Installation, Testing and Commissioning of DX type double skinned air handling units, floor mounting type of 16.5 TR, 12240 CMH capacity (Twin Circuit evaporator coil of 8.5 TR each) complete with suitable blower/fan (asper approved make), ARI certified, with 0.8mm double skinned 40mm thick PUF panel, belt guards, suitable supports for suspending from slab, vibration isolator, etc. conforming to specifications.

The AHU shall contain blower section, with suitable external static pressure, built in pre filter, fine filter and able to connect to 2 nos of 8.5 TR condensing units, insulated SS drain pan, 4/6 row cooling coil, electric motor, belt drive package with TEFC motor class 'B' insulation, suitable for 3 phase, 415 V, 50Hz supply, including suitable AHU-Control panel.

The AHU control panel shall consist of Microprocessor based control complete with accessories, machine Isolation / disconnect switch, Necessary starters suitable for Indoor & two outdoor units complete with O/L, U/V, phase reversal protection, single phase preventors including fault annunciation display i/c copper conductor control and power cable.

The above work includes all ducting/mouth piece. connection like canvass connection, if any alteration, to connect exist supply & return ducting with appropriate insulation, Mounting pads, etc. complete as required.

Condensing Units: Supplying, Installation, Testing and Commissioning of air cooled condensing unit machine with each having a capacity of 8.5 TR and details as mentioned below suitable for operation on R 32/R-410A Green refrigerant comprising of Scroll type compressor hermetically sealed complete with automatic capacity, safety switches, lubrication system ,condenser with necessary fittings for refrigerant piping connections, necessary structural support for mounting condensers, valves and accessories to inter connect compressor and condenser including pressure testing, vacuum.. complete as required.

Copper Pipping: Supplying, Installation, testing and commissioning including vaccumiazation and Nitrogen testing of following nominal sizes of soft/hard drawn copper refrigerant piping [1-1/8” for Suction Line & 5/8 or 7/8” liquid line] set for the above 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 elastomeric 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

HVAC Robotic duct cleaning with the following scope of work: