MAINTENANCE OF COLD STORAGE AND AC PLANT AT MH UNDER GE GOLCONDA

Amount

AC PLANT: Leak testing of the system of the central A/C plant system of the following capacities with nitrogen (N2) pressure after evacuating of the existing refrigerant gas into the empty cylinders by separating the entire system such as compressor, condenser, refrigerant lines, evaporator etc, rectifying of the same by replacing the ‘O’ rings / teflon washers of suction / discharge / service valves, replacing the flair nuts etc, evacuating of the nitrogen from the system, vacuuming, recharging of taken out the refrigerant gas all as directed by Engineer-in-Charge for the capacities 34 TR.

Disconnecting electrically and mechanically of the mono-block pump set of 3 to 5 HP capacity from the existing position by arranging dummy plates to suction and delivery line, removing from the existing position overhauling of the same, cleaning of the impeller, replacing the worn-out bearing, gland bush, gland nut, gland rope, greasing, re-fixing back and testing complete all as directed by Engineer-in-Charge.

All as per item No.2 above but rewinding, condensor fan varnishing, insulation, greasing , the mono-block pump set of 3 to 5 HP capacity except replacing of bearing all as directed by Engineer-in-Charge.

Descaling of condenser of the capacities-34 TR by circulating descaling agent HCL through the condenser by forced feed method, removing the end covers of condensers, cleaning the each tube of condenser thoroughly by brushing, re-fixing back the end covers of the condenser by replacing the rubber gasket, nut, bolts, washers, cleaning of spares nozzles cooling tower, sump, water line, strainer and testing for normal working pressure complete all as specified and directed by Engineer-in-Charge. NOTE: After descaling the HP of the system should not be more than 200 psi, other wise descaling shall be again carried out with out any extra cost

Supply and fix Voltmeter 0 – 500 Volts capacity by disconnecting the electric connections and removing burnt out / unserviceable voltmeter 0 – 500 Volts, including reconnecting and testing complete all as directed by Engineer-in-Charge.

Supply and fix Ammeter 0 – 100 Amps capacity by disconnecting the electric connections and removing burnt out / unserviceable Ammeter 0 –100 Amps, including reconnecting and testing complete all as specified and directed by Engineer-in-Charge.

Taking out unserviceable pressure gauge and supply and fix pressure gauge of 100/150 mm size or equivalent all as specified and directed by Engineer-in-Charge.

Supply & Fixing the Temperature gauges in the chiller & AHU Water Pipe line complete with all accessries and as per sample all as specified and directed by Engineer-in-Charge.

Supply & Fixing of Dual plate check Valve Of size 65 mm Dia in the chilled Water pump Dischrage line With necessary Special Fitting and supports Complete with all accessries and as per sample all as specified and directed by Engineer-in-Charge.

Supply & Fixing of Rubber Expanion joint for chillers and pump of Size 65MM Dia With Necessary Special Fitting and support complete with all accessries and as per sample all as specified and directed by Engineer-in-Charge.

Removing unserviceable push button activator by disconnecting all the connections and supply and fix new push button activator, reconnecting and testing complete all as specified and directed by Engineer-in-charge.

Supply, install , Testing and commissioning of 0.3 micron EU-14 HEPA Filters of outer size1220x610x150 mm with casing of aluminium foil and medis made of submicron glass fiber paper flange type with grill made out of stainless steel perforated sheet 20 SWG under the filters and taking out the old unserviceable one.

M & L for VOLTAS / OEM company aouthorized Service Engineer to rectify software problem / Reset / Programming of Chiller Unit of AC Plant of Capacity 35 TR complete all as specified and directed by Engineer-in-charge.

Removing unserviceable temperature sensor and supply and fixing of temperaturer sensor of existing size complete all as specified and directed by Engineer-in-charge.

Supply and fixing of 32 Amps power contactor of suitable size as per the existing sample for compressor all as specified and directed by Engineer-in-Charge.

Supply and fixing water flow switch as per sample all as specified and directed by Engineer-in-Charge.

Servicing of air cooled condensor with coil cleaning chemical complete all as specified and directed by Engineer-in-Charge.

Cleaning of water chiller by circulatiing of Concentrate HCL chemical complete all as specified and directed by Engineer-in-Charge.

Servicing of AHU including cleaning of coil cleaning chemical and cleaning of 10 micron filter and 5 micron filter complete all as specified and directed by Engineer-in-Charge.

Servicing of chiller pumps like greasing and repalcing of gland rope minor consumable items commplete all as specified and directed by Engineer-in-Charge.

Supply and fixing of MN25 contactor all as specified and directed by Engineer-in-Charge.

Supply and fixng of catch all filter of suitable size for chiller all as specified and directed by Engineer-in-Charge.

Supply and filling refregerant gas A- 407 C all as specified and directed by Engineer-in-Charge.

Removing of unserviceable/burnt out DOL starters by disconnecting all the cable connections connection supply and fix new DOL starter (MK-1) including reconnection and testing complete all as specified and directed by Engineer-in-Charge.

Supply and fix Indicating lamps (RYB) phase (Set of three) – 01 set all as specified and directed by Engineer-in-Charge.

Outsourcing of services for central AC Plant comprising of Air cooled Scroll chiller unit with multiple hermatically sealed scroll compressors three refrigerant circuits using R410A/R407C of zero ODP, Refrigerant driven with 2-pole squirrel cage induction motor 3 phase 415V suitable for not less than 34 TR nominal refrigeration capacity, air cooled condensor with Chilled Water monobloc pump -3 nos (2 working + 1 standby) for the chilled water circuit , 215 USGPM at 15 m head alongwith, Air handling units not less than 8000 CFM @ 65 mm static. 02 Nos complete with in-built control panel having microprocessor based control for operation of compressor, condensor, chillers having features of auto operation, min run time equalization, auto restart after power failure, protection mechanism and all the other safety devices neccesory for the safe operations of the unit, complete chiller package unit to be pre-wired with suitable capacity contactors with all the neccessary interconnections - 3 nos (2 working + 1 standby). designed conditions of 22 +/- 2 Degree Centigrade, RH 55 +/-5% to the entire satisfaction of Engr-inCharge,each shift of 8 hours for 03(Three) shifts per day with one Ref / Mech in each shift Incl sundays and Holidays duly employing the manpower as mentioned shift timings are as per site requirement OR directed by Engr-in Charge. 1st Shift - 0600 hrs to 1400 hrs, 2nd Shift - 1400 hrs to 2200 hrs & 3rd Shift - 2200 hrs to 0600 hrs .

Note for Item No.27: (a) The operators Employed shall be qualified with ITI in Ref. & AC OR 12 class with 3years experience in Ref. & AC. (b) Log book should be maintained properely. (c) Maint. Task of plant daily , weekly,monthly checking & Records to be maintained as per OEM's Shedule. (d) If any operator is absent from duty single shift recovery @ 2 shifts shall be recovered from contractor. (e) The contractor shall provide Log book, Stationery, Mobile phone(for communication), Clamp meter,tool kit i.e. screw driver ,cutting plier,line tester, Hand gloves for safety of his staff. (f) The operators should be free from habbits of any Addiction such as ,Smoking,and other Drugs. (g) The rate quoted is deemed to be inclusive above mentioned points. (h) Wages should be paid through Bank account (ADHAAR Linked) of persons employed

Cold storage Room: Supply and fixing semi sealed compressor of package plant of ( 1.5X4 TR) capacity from its installed position by placing dummy plates to suction and discharge valves, opening of the compressor, removing of all the internal parts, cleaning of all parts thoroughly, overhauling of the compressor, replacing of worn out parts such as suction reeds, discharge reeds, piston rings, compression rings, connecting rods, bearings, piston pins, springs, spring washers, nuts, bolts, washers `O’ rings, gasket set etc , reassembling of the all internal parts after replacing the worn out parts, rewinding of the compressor re-fixing back, removing of the dummy plate, oil charging and checking of oil pressure, vaccumising and leak testing and testing the compressor completely all as specified and directed by Engineer-in-Charge. NOTE: The rate quoted shall deem to include for compressor oil, however refrigerant gas shall be measured and paid separately.

Supply and fix AC contactor 32 Amps, 3 phase ,415 volts, 50 Hz suitable for cold storage all as specified and directed by Engineer-in-Charge.

Cleaning of the evaporator coils of the capacities(1.5X4) TR with cleaning acid by forced feed method to remove the unwanted dust particles formed on the coil and fins, cleaning of the dust particles, parts of periodical maintenance, cleaning of liquid lines, strainer, expansion valve etc. and testing complete all as specified and directed by Engineer-in-Charge.

Supply and filling refregerant gas-R22 all as specified and directed by Engineer-in-Charge.

Supply and fix cold storage room Temperature gauge as per sample complete and all as specified and directed by Engineer-in-Charge.

Supply and fix out door unit fan motor with blade water proof type suitable for cold storage unit all as specified and directed by Engineer-in-Charge. Note :- The retreived materials have been mentioned in the Sch of credit in the tender documents in pdf form. The amount of Sch of credit will be deducted offline from the amount of BOQ at the time of acceptance.

SAI ENGINEERING WORKS

MOHAMMED MUMTAZ ENGINEERING WORKS

SANTHAM TRADERS