AMC CONTRACT FOR 02 NOS HXC SCREW CHILLERS AND REPAIR AND MAINTENANCE OF CONNECTED ITEMS INSTALLED AT BISON LAB OF 6 WG, AF STN UNDER GE (AF) BARRACKPORE

Amount

AMC contract for 2 Nos screw chillers Carry out comprehensive maintenance for 30HXC series PRO-DIALOG Plus control Screw- compressor Air-and water cooled Liquid chillers Make Carrier Capacity - 160 TR Chiller Model - 30HXC 190A with 2 Nos of compressor for each Chiller under Carrier Air conditioning & Refrigeration Limited schedule preventive maintenance scheme (SPMS) as under with accessories. (Required stores will be issued under Schedul 'B') :- (a) MONTHLY INSPECTION AND PREVENTIVE MAINTENANCE Contractor shall provide qualified trained authorised CARL service Engineer and technicians to visit at site with material & labour, testing equipment to check /inspection and routine maitenance the following :- (i) To visit & check the operating parameters of the chillers, all saftey and indicating devices and measuring of voltage, amps and all other parameters every month and . (ii) Review the previous months operating log records and alarm history. (iii) Inspect the unit for any unusaual vibration, noise etc. (iv) Check for a sign of refrigerant leakage with the system pressure only the rectifying the same. (Leak repair shall be at extra charges). (v) Check the proper functioning of microprocessor and take control test (If required). (vi) Check/calibrate the flow switch for proper functioning (If required).

Item no 1 Continue (vii) Check the antifreeze and carrying out the setting of the same (If required). (viii) Check the LP/HP cut out switches and to replace the same, if found defective. (ix) Check the water flow across the cooler/condenser by checking the pressure drop across the shell. (x) Periodical software up-gradation. (xi) Replacement of spares including any type of labour charges and spare will be issued under Sch ''B" for for fixing. (xii) Installation of sparae parts (In case of defective) without refrigerant drawback (Except DGT Senson) etc. (b) QUARTERLY INSPECTION AND PREVENTIVE MAINTENANCE (i) Cleaning of Pot Strainers in water circuit. (ii) Checking of safety control and switches/replacement if required. (iii) Calibration of meters and gauges/replacement if required. (iv) Cleaning of contact switches, checking of relays, timer etc. replacement if required. (v) Clean/check the electrical panel of the chiller with air blower. (c) HALF YEARELY INSPECTION AND PREVENTIVE MAINTENANCE Total plant overhauling shall be done once a year, preferably in winter. Prior permission shall have to be taken from the Engineer-in-Charge for the job.

Item no 1 Continue (i) Compressor and accessories to be serviced. (ii) Control panel along with gauge to be serviced. (d) SPECIAL INSEPECTION AND MAINTENANCE During operation if machine become unserviceable for that Contractor shall provide qualified trained authorised CARL service Engineer and technicians to visit at site with material & labour, testing equipment to check and attend complaints as and when called and rectify the fault within 24 hours of the chillers by following all the recommendations and instruction given in the manual and service instructions for the product including tags and levels affixed to the equipment , component and any parts will be supplied separately free for fixing as Sch 'B' Store, and to comply with all other relevant safety regulation and as directed by Engr - in Charge. (e) Following will also be part of maintenance :- (i) Cost all consumable item like grease, cotton vest, Cleaning agent etc shall be included in quoted rate. (ii) Spares required for carry out Monthly, Quarterly, Annual and Special maintenance shall be issued under Sch 'B' . Fixing charges shall be included in quoted rate. (iii) Cost of any type Testing equipment / Tools required for carry out Quarterly, Annual, Special maintenance shall be included in quoted rate.

Item no 1 Continue (iv) Cost of any type transportation required for carry out Quarterly, Annual, Special maintenance shall be included in quoted rate. (v) Cost of any type Visit charges required CARL Service Engineer and technicians for carry out Quarterly, Annual, Special maintenance shall be included in quoted rate. (vi) Cost of any type consultancy charges required for carry out Quarterly, Annual, Special maintenance shall be included in quoted rate. (e) Followings are excluded in the above work :- (i) The repair/services of low side equipment such as piping, ducting, filters, grills, pump sets AHUs, AHU Motors, condenser motor chiller pumps etc. (ii) Any day to day maintenance and operation and servicing of the plant. (iii) Any kind of atmospheric/normal wear and tear, corrosion, chemical pollution of rusting/pitting of the plant/heat exchangers. (iv) Painting of the equipmnets. (v) Any kind of modifications including welding work/masonary work/carpentry work/rewiring/ducting/insulations etc. (vi) Main electrical panel switches/breakers/fuses and related interconnecting power work other than chillers. (vii) Accessories equipment such as water supply lines, drain lines, relief lines, pressure gauges, thermometers etc.

Item no 1 Continue (viii) Any work related to removal of refrigerant and beyond. (ix) Any item or equipment as are recommended or required by insurance companies, government, states, municipal or other authorities. (x) Replacement of any equipment (Compressor, condenser or cooler) as a whole. (xi) Descaling of condenser and cooler. (xii) Replacemetn of any spare/consumable with refrigerant drawback. (xiii) Colling tower, motor, fins nozel etc.

Material & Labour charges for descaling of condenser (02 Nos) with & including supply of chemical complete all as directed by the Engr-in-Charge. NOTE:-work to be carried out half yearly.

Labour only for cooler brushing (02 Nos) without chemicals complete all as directed by the Engr-in-Charge. NOTE:-work to be carried out half yearly.

Material and labour for leak repairing of condenser and cooler (Maximum 5% of total tube can be repair or blank of more that 5% can reduce the chiller efficiency and caused further mechnical damage of chiller and other component) complete all as directed by the Engr-in-Charge.

Material and labour for leak repairing of the system (without refrigerent drawback) complete all as directed by the Engr-in-Charge.

M&L taking down of chiller/condensing Motor (15 HP) from foundation after disconnecting all electric connection. Re-fixing the same after making proper alignment, replacement metal coupling alongwith rubber bush complete including nuts/bolts/washers, gland packing (for pump), rusted nuts bolts, insulation, bearing of motor (as per existing size), varnishing and heating and complete greasing etc. Testing the same on load, complete all as specified and directed by the Engr-in-Charge.

M&L Servicing of AHU of capacity 12500 CFM, cleaning all air filters (internal & external), drain out pipe, re-alignment of base frame of motor & blower and replacement of V belt (as per existing size) complete all as directed at site by the Engr-in-Charge.

M&L for cleaning the cooling tower properly by scruber from inside and outside, taking out all sludge, rust etc with chemical and apply synthetic enamel paint two coat over a coat of re oxide on all surface including steel ladder ,servicing & greasing of motor , valve etc complete all as directed by the Engr-in-Charge.

M&L for painting of all outer surface of pipe lines with two coat synthetic enamel paint with colour coding as per IS (as per existing colour) after cleaning/removal of all dust/rust from the outer surface complete all as directed by the Engr-in-Charge.

M&L for painting of all outer surface of duct lines with two coat of weather proof acrylic synthetic enamel paint with colour coding as per IS (as per existing colour) after cleaning/removal of all dust/rust from the outer surface complete all as directed by the Engr-in-Charge.

Taking down for 100mm dia butterfly valve including replacement of rubber gaskate, descaling the gate and refixing all the same complete all as directed by the Engr-in-Charge.

M&L for dismantling of star delta Starter, complete checking the wiring and re-connect the same after repair and testing the same after replacement of the following defective spares complete all as directed by the Engr-in-Charge.:- (a) Replacement of contactor of capacity 32 Amp, 3 Pole, 415 Volt, AC rating 1, Type MNX 32. (Make : L&T/C&S) - 02 Nos (b) Replacement of add on auxiliary contact block (2 NO + 2 NC) -02 (Make : L&T/C&S)

M&L for fixing in repair pressure guage (0-16 Kg/Cm2) complete all as directed by the Engr-in-Charge.

M&L of air filter 5 micron (outer) size 50 cm x 50 cm complete all as directed by the Engr-in-Charge.

REMCO

SANKAR TRADERS