Military Engineer Services Tender

Comprehensive maintenance and routine check up of the chiller unit of capacity (2 x 130 TR and 1 x 90 TR) water cooled chilling unit installed at Simulator Complex (Dhruv Bldg) at ND School on monthly basis, comprising of the following (HIgher Side of AC plant) Mkae : Blue Star of Model No CHFL-Y24 :- Hermetic rotary screw compressor using R- 134 A refrigerent, flooded type shell and tube evaporator shell and tube condenser, microprocessor based control panel ,star delta/part winding starter with control microprocessor to maintain inside temp 23 ± 2 Deg C including all maint routine checkups as recommended by OEM and breakdown attending maintenance as and when required as intimated by EIC at site with complete spares through OEM/authorised service dealer of OEM for the complete machineries/equipments/accessories etc for smooth functioning of AC plant. Preventive Maintenace scope of work:- i) To visit & check the operating parameters of the chillers every quarter / month as per OEM schedules. ii) To review the previous months operating log records and alarm history. iii) To inspect the unit for any unusual vibration, noise etc. iv) To check for a sign of refrigerant leakage and rectifying the same. v) To check the operation of the expansion valves, once a year. vi) To check / calibrate the flow switch for proper functioning. vii) To check the antifreeze and carrying out the setting of the same. viii) To check the LP / HP cut out switches and to replace the same, if found defective. ix) All the breakdowns including the compressor failure, if any shall be attended and rectified. x) To clean the electrical panel of the chiller every quarter with air blower xi) Rewinding of the compressor motor, if required. xii) Repairing of the leakages except pertaining to the heat exchangers. xiii) To attend to the complaints as and when called for. xiv) To provide any spare covered under the scope of AC plants

A. ANNUAL MAINTENANCE OF CHILLER CONDENSER TUBE( Once in contract period) (i) Cleaning of shell and tube condenser and chiller capacity (2 x 130 TR and 1 x 90 TR) by chemical and mechanical process using brush after opening with sides of condensers and chillers brushing and reconnecting with suitable size of packing /gasket in same position including leak testing as per requirements and quoted rate included refixing of removed thermal insulation with new nitrile rubber / Gasket sheet complete all as specified and as directed.

B. ANNUAL SHUTDOWN INSPECTION (Once in Contract Period) 1. To replace internal oil filters, as & when required during the contract period. 2. To replace refrigerant driers, as & when required during the contract period. 3. To inspect the oil quality by color and replace/top up as per requirement. 4. To operate the machines for 08 hours (Maximum) and adjust the controls for the optimum operation.