COMPREHENSIVE AND PREVENTIVE MAINTENANCE OF AC PLANTS AT X L AREA AT AF STN DIGARU UNDER AGE I AF DIGARU 2ND CALL

Amount

SCHEDULE 'A' PART-I (B/R PORTION)

M & L comprehensive & preventive maintenance of VRF type AC plant of total capacity 160HP (4x20 HP at shed No. 26 & 4 x 20 HP at Shed No. 39) including outdoor and indoor units. Air-conditioning system (ODUs and IDUs) shall be serviced throughly 04 times - 03 Dry and 01 Wet during the stipulated time frame of maintenance contract. Any number of breakdown calls pertains to the refrigeration equipments irrespective of nature of call must be attended to make the system 100% serviciable complete in all respect as specified and directed. The details of AC plant units are under:- OUTDOOR UNITs. (a) Make of outdoor units: Mitsubishi Electric India Pvt Ltd. (b) ODUs Model No: PUCY-P500 YKA, TH-D (c) ODUs Machine / Srl No : (i) 77P00192, (ii) 77P00187 (iii) 79P00313 (iv) 77P00199 (v) 7XP00334 (vi) 77P00178 (vii) 78P00291 & (viii) 78P00292 (d) Vintage of Outdoor Units : Jul 2021 INDOOR UNITs. (a) Make of Indoor units : Mitsubishi Electric India (b) IDU Model No: PAC-AH500M-J (c) IDU Srl No: (i) 7YW04732 (ii) 7YW04736 (iii) 7YW04752 (iv) 7YW04739 (v) 7YW04744 (vi) 7YW04751 (vii) 7YW04750 & (viii) 7YW04749 (d) Vintage of Indoor Units : Jul 2021.

Supply and fixing following spare parts for VRF Type AC plant of Total capacity 160 HP ( 4 x 20 HP at Shed No. 26 + 4x20HP at Shed No 39) Make : Mitsubishi Electric India (OEM) Outdoor Heat exchanger, Model No PUCY, P500YKA. TH-D, complete all as specified and directed.

Replacement of old unsv burnt electrical strip heaters of Air handing unit complete all as specified.

Taking out the defective pump set alongwith motor from the AHU by disconnecting electrically and mechanically, shifting to civil workshop, dismantling the same to remove burnt out windings and defective parts, rewinding the motor with super enemelled copper winding wire incl all insulating materials all as per existing. varnishing / drying etc complete and replacing the bearings / bushes as per existing size replacing the pump impeller, ressembling the same shifting to original site. Reconnecting electrically and mechanically and testing for proper working complete all as specified and directed for the 10HP, 415Volts 1455RPM.

Supply and fix in repair Digital Temperature-Humidity Controller of Make & Model - real Instruments STC 3028 or equivalent, complete all as specified and directed.

M & L for carryout the defective thermol insulation to duct 13mm thick with 19mm thick high density industrial quality nitril rubber insulation, class O fixing to the duct with adhesive, covering with aluninium foil face, joint sealing with 50mm thick complete all as directed by Engr-in-Charge.

Repair / replacement of old torn out and unservicable bonded mineral wool blanket slab 40mm thick made from glass density 24 Kg / Cum and fixed in celling complete all as specified and as directed.

Supply and fix in repair motorized Fire smoke damper made out of galvanized steel sheet blades and frame. The dampers shall be fabricated out of 16G GSS. Dampers shall be equipped with fail safe fusible links rated at 450 C. The fire dampers shall be with minimum 1.5 hour fire rating complete all as specified and directed.

Repair / replacement of ducts exposed to atmosphere with polythene sheet, chicken wire mesh and providing 12mm cement sand plaster mixed with water proof compound in ratio of 1:3 in 2 layers each layer of 6 mm thick first layer to be rough and second layer with smooth surface to properly cover the wire mesh and final finish shall be done with synthetic paint all as directed.

FREEZCON (BID ID -3142133)