8321 OUTSOURCING OF SERVICES FOR OPERATION OF CENTRAL WATER COOLED SCREW BASED CHILLED WATER AIR CONDITIONING PACKAGE UNIT WITH ALL ACCESSORIES AT DRDL KALINGA UNDER AGE (I) RnD NSTL VISAKHAPATNAM

Amount

Outsourcing of services for operation and routine maintenance of 3x70 TR central water cooled screw based chilled water air conditioning package type (2 working & 1 Standby) plant [Blue Star make] for VIB-I and MCC Building consisting of Semi hermetic twin screw based type compressors, Chiller water pumps - 03 Nos, Condenser Pump-03 Nos, chiller AHUs in different locations (18000CFM -02 Nos in MCC and VIB I Building and 10000 CFM - 02 Nos in VIB-I Building), cooling towers, electrical control panel boards complete including daily maintenance of plants log sheets for each plant, cleaning of plant rooms, machines, control panels and area cleaning all around the plant room including cutting of vegetation, grass etc. complete all as specified and as directed by the Engineer-in-Charge. Note:- Contractor shall employ One Skilled Refrigeration Mechanic in General shift of 08 hours per day on all days including Sundays & Public Holidays.

Outsourcing of services for operation and routine maintenance of 3x70 TR central water cooled screw based chilled water air conditioning package type (2 working & 1 Standby) plant [Blue Star make] for VIB-I and MCC Building consisting of Semi hermetic twin screw based type compressors, Chiller water pumps - 03 Nos, Condenser Pump-03 Nos, chiller AHUs in different locations (18000CFM -02 Nos in MCC and VIB I Building and 10000 CFM - 02 Nos in VIB-I Building), cooling towers, electrical control panel boards complete daily maintenance of plants log sheets for each plant, cleaning of plant rooms, machines, control panels and area cleaning all around the plant room including cutting of vegetation, grass etc. complete all as specified and as directed by the Engineer-in-Charge. Note:- Contractor shall employ One Skilled Refrigeration Mechanic per shift of 08 hours in 3 shifts (round the clock) per day on all days including Sundays & Public Holidays.

Supply and replace Wedge (V) Belts B - 72A for compressor & motor/ AHU & motor. [Make: Fenner/ Yule/ ContiTech]

Supply and replace Wedge (V) Belts B - 95 for compressor & motor/ AHU & motor. [Make: Fenner/ Yule/ ContiTech]

Supply and replace Wedge (V) Belts B-2253 LP /B87 for compressor & motor/ AHU & motor. [Make: Fenner/ Yule/ ContiTech]

S&F in repairs Single phase preventer relay for protection against single phasing, phase reversal condition, unbalance condition, with inbuilt timer working on 440V, 50Hz power supply complete all as specified and directed. [Make: L&T/ GE/ Minilec/ Siemens]

S&F in repairs Starter Push Button switch with 1 NO + 1 NC complete working on DC/ AC supply up to 16 Amps capacity all as specified and as directed [Make: L&T ESBEE/ Siemens]

S&F in repairs 4 pole contactors AC operated rating at 415 Volts, AC1 45 Amps rating with 2NO + 2NC auxiliary contacts with operatabe coil voltage 24 volts to 415 volts AC/DC with front/ side mounted Add On blocks as per site requirement. [Make: ABB/ Siemens/ Schneider/ L&T]

All as per Item No. 9 herein before but of AC1 rating 30 Amps

All as per Item No. 9 herein before but of AC1 rating 60 Amps

S&F in repairs Thermal Overload relay, 18 to 42 Amps, direct mounted on contactors [TA42DU series of make: ABB or equivalent in GE/ L&T]

S&F in repairs Thermal Overload relay, 22 to 80 Amps, direct mounted on contactors [TA75DU series of make: ABB or equivalent in GE/ L&T]

M&L for complete leak testing the entire central AC plant of capacity up to 60 TR capacity/ chiller unit consisting of compressors, condensers, chillers, AHUs with connected chilled piping, expansion valves and all accessories by flushing out the refrigerant gas present in the system, pumping Nitrogen gas at requisite pressure, locating leak positions, rectifying the leaks, including pressure testing and holding the pressure for 48 Hrs for observation for any pressure drop in the system and flushing out the complete system on rectification of leaks if any, vacuumising & de-hydration the complete system with heavy duty vacuum pump and removal of moisture and other foreign particles from the system complete including checking of all safety controls and parameters, testing & commissioning of the AC plant after charging the refrigerant gas all as directed by the Engineer-in-Charge. [Note: Supply & charging refrigerant gas will be measured and paid separately]

Supply only Refrigerant gas 'R- 22' in manufacturer's sealed cylinder.

Supply only Refrigerant gas 'R- 134a' in manufacturer's sealed cylinder. Note for Sl. item No 15 & 16:- (i) Empty cylinder will be returned to contractor on completion of work (ii) Net weight of refrigerant gas shall be measured and paid under these items.

M&L for carrying out repairs to PCB boars/cards by replacing the damaged/ worn-out electronic components/ ICs with heat sinks complete for Central AC plants of various capacities from 70 TR to 160 TR complete including testing and commissioning all as directed.

S&F in repairs pneumatic safety valve for condensers of central AC plants of capacity 35/ 40/ 60/ 80/ 120/ 140 TR. [Make: Castle/ Brassolite/ Henry]

S&F in repairs flow control limit switch/ sensor as per the existing make/ model complete all as specified and as directed. [Make: Castle/ Rapid controls/ Honeywell]

S&F in repairs water pressure gauge dial type 4" dia 0 to 7 kg/cm² all as directed. [Make: Fiebig/ Heibig/ H.Guru]

S&F in repairs temperature meter dial type with stop valve 0 to 30° centigrade with complete accessories all as directed. [Make: Dimple/ Tedington/ H-guru/ Danfoss/ Universal]

S&F in repairs HP cutout on compressed/ pressurized gas lines complete all as directed. [Make: Danfoss / Indfos]

S&F in repairs LP cutout on compressed/ pressurized gas lines complete all as directed. [Make: Danfoss / Indfos]

S&F in repairs temperature sensor/ thermostat controller along with necessary control wiring and accessories complete all as directed. [Make: Siemens/ Honey well]

S&F in repairs humidity sensor along with necessary control wiring and accessories complete all as directed. [Make: Siemens/ Honey well]

SAI ENGINEERING WORKS

LAKSHMI SAI CONSTRUCTIONS