SPECIAL REPAIR REPLACEMENT OF BER CHILLER NO 4 AT INHS ASVINI COLABA UNDER AGE (I) ASVINI COLABA MUMBAI

Amount

Dismantling the existing Chiller No-4 installed at Chilled water type AC Plant of Capacity 340TR complete unit very carefully with out any interruptioning to the functioning of other Plants complete all as specified and directed.

Supplying, installing, testing and commissioning of AHRI Certified 400 TR (Actual Capacity) Water Cooled Screw Chiller with Multiple Compressors (Minimum 2), Unit Mounted Soft Starter, Shell & Tube type Condenser and insulated Evaporator, Expansion Valve, suitable for energy efficient and ecofriendly R-134A refrigerant and all other accessories as per manufactures standard like Microprocesser Control Panel (BMS Compatible), soft key starter panel, display, oil cooling system and all necessary safety & operating controls etc electrical connection all as per site condition and all as specified and directed by Enger- in- charge. Make :- Carrier, Daikin, Trane, York, Blue Star.

The Chiller plant shall have following component/specifications:- (a) Water Cooled Screw Chiller plant of 400TR actual capacity at design conditions as per specifications given in data sheet of OEM. (b) Semi Hermetic Twin Screw type Multicompressor with R- 134A Refrigerant Gas, Electrically operated on three phase 415 Volts +/-10%, 50 HZ AC power supply complete with automatic step less capacity control from 100% to 20% for each compressor with slide valve mechanism, solenoid valves, inbuilt oil separator, oil pressure safety switch, crank heater etc, Each compressor should be able to operate independently. (c) Flash economiser to increase sub cooling and reduce action superheat (d) Flooded shell and tube type 2 Pass Evaporator with the refrigerent in shell & water inside tubes with 25 mm thick insulation. (e) Flooded shell and tube type 2 pass Condenser with the refrigerent in shell & water inside tubes with openable head at other end for cleaning

(f) Electronic Expansion valves. (g) Microprocessor based control panel suitable for remote on/off operation and BMS connectivity with Modbus RTU Protocol, panel shall be able to store minimum last 100 Alarm/ trip status and 1024 readings for each parameters (h) Touch screen type color Graphic display with minimum resolution of 128 x 64 pixel, shall indicate chilled water inlet/ outlet temperature, pressure and condenser water inlet/ outlet tempertaure,presuure all important paramter like RPM,voltage ,current. (j) Nessary interconnecting copper piping complete with fitting valves etc with required safety controls (k) Initial charge of ECO friendly non CFC refrigerant R-134a and synthetic oil for the complete plant (l) One set of differential pressure switch to prevent operation of chiller at low chilled water flow (m) Electrical control panel with suitable capacity and over load capacity solid state starter of for each compressor to reduce starting current

Reinforced concrete structure for foudation of suitable capacity and thickness all as specfied and directed by Engineer-in-Charge Note : (i) Plant offered by the tenderer must confirm to the data sheet of OEM. The chiller must be able to meet the designed temperature of the hospital i.e 21± 2°C at RH 55 ± 5% under normal conditions. (ii) AHRI certificate of offered chiller model to be submitted along with offer. (iii) Chiller should unload from 100% to 20 % of Design capacity. (iv) Compressor shall be OEM make only. (v) On completion of work and before issuance of completion certificate, the contractor shall submit complete drawings in the form of four completer sets of original (reproducible), technical Literature, test certificates, operation & maintenance manual and list of necessary spares.

Dismantling old unserviceable cable & Supply and laying XLPE insulated , screened , PVC bedded , galvanised steel strip of wire armoured electric power cables (heavy duty) of size 300sqmm Copper Conductor,1100 volts grade,3.5 Core as per IS including proper glands on both side for proper earthing Note:- Old unserviceable XLPE cable will be taken on charge & deposit to department store.

Taking down old existing MS pipes and supply , lay and welding of MS pipe of size 350mm heavy grade with all fittings laid on floors or fixed to walls/ cielingsetc with necessary clamps complete all as specified and as directed.

All as per item No.4.00 above but 300 mm complete all as specified and as directed.

All as per item No.4.00 above but 250 mm complete all as specified and as directed.

Taking down old unserviceable/deteriorated insulation from any surface ,cleaning the steel surfaces by using wire brush etc. and supply & fix nitrile rubber insulation one layers of 19mm thickness sticking on the chiller surfaces by using approved adhesive and sealing the joints by weather proof tape all as directed by Engineer-in-charge.

Taking down old unserviceable insulation over the chiller pipe line ,cleaning water pipe surface with steel brush remove dirt/ dust M&L for chilled pipe line insulation by applying a coat of zinc chromite primer and apply a two coats of cold setting adhesive compound (CRPX) on pipes for sticking the insulation bonded mineral wool of density 144 Kg/Cum, 50mm thickness tightly pressed on th pipe up to 250mm dia seal all the joint with adhesive compound wrap the insulation surface by using one layer of polythene sheet 50mm wide pvc tape cover the entrire with chiken mesh finish the surface, of density 144 Kg/Cum and with one coat of sand and cement plaster and cover 26 guage GI cladding of approved color complete suitable for above insulated pipe section complete all as specified and as directed.

Taking down old unsv CI butter fly valve of any make and size and supply and fixing of new CI Butter fly valve slim seal design with nitrile rubber lined seat with clutch lever (p10) as per IS 13095 of size 250mm complete all as specified and as directed.

Material and labour for cross arms, bracings, supports, clamps and back plates fabricated from structural steel sections including nuts, bolts, washers, welding, bending cold or hot, drilling holes for bolts, in any shape or size as indicated or directed and inclusive of one primer coat, one under coat and one finishing coat of paint complete all as specified and as directed.

BRITE INDUSTRIES

M/S N.K BUILDERS

somnath engineering corporation

AIRFRAME

HVAC Engineering Co