ANNUAL MAINT CONTRACT OF VK-2500 ENGINE TEST BED AT 3 BRD UNDER GE (AF) MC CHANDIGARH

M&L for Comprehensive periodical systematic servicing for Water Softening Plant after disconnecting filters, electrical and water connection complete and reassembling all water and electrical connection, filters after servicing the plant complete all as specified and directed. Comprehensive periodical systematic servicing cover the following ; (a) Replacement of filters of capacity 6.2 m3/hr. Diagnosing the fault and rectifying the defects detected in reasonable time.

(b) Replacement / Repair of the faulty spare parts of the Water Softening Plant on requirement basis (including Filters, Chemical / Liquids for cleaning). Minor spares required to make plant functional electrical / mechanical costing less than ₹3000.00 are deemed to be included in the over all rate quoted. (c) Cleaning of resin bed and Brine tank of the softening plant will be included in the quoted rate. (d) Repair / replacement of any type and size of valve required to make the plant functional is deemed to be included in the quoted rate. (e) Checking of inlet / outlet water hardness after servicing of the plant.

M&L for Comprehensive periodical systematic maintenance and servicing for Air Cooled Screw Chillers of capacity 72.55 TR -01 Nos which shall include the following :- (a) Cleaning of condenser coils, checking and tightening of electrical connections, inspection of screw compressors, refrigerant gas pressure checking, oil level checking, cleaning / replacement of filters, inspection of expansion valve, testing of safety controls and sensors, checking of motors, pumps and fans, vibration and noise inspection, leak testing of refrigerant lines, calibration of controls etc. (b) Motor Winding Megohm Test : Performing insulation resistance test on compressor motor windings, if readings are below 10 megohms, the Motor winding shall be replaced and the cost of the shall deemed to be included in the quoted rate.

(c) Condenser and Evaporator Tube Inspection : Performing Eddy Current Testing of Heat Exchanger Tubes and doing mechanical brush or chemical tube cleaning to avoid any tube fouling and pitting. (d) Oil Separator Element Replacement : Replacing of Oil Separator Element as per OEM interval. (e) Full Refrigerant Charge Verification : Recover, Weigh, and Recharge Refrigerant to OEM specification; verify superheat and sub-cooling at rated operating conditions; check and replace filter-drier; perform standing pressure test before recharge to confirm system integrity. (f) Refrigerant leak check : Inspect all joints, Valve Stems and brazed connections with Electronic Leak Detector. (g) Electrical Connections and Contactors : Verify Starter and Control Panel connections are tight and free of heat discoloration; check contactors for pitting or arc marks (h) Safety Controls Functional Test : Perform Test for High-Pressure Cutout, Low-Pressure Cutout, Freeze Protection and Motor Thermal Overload Test.

(j) Refrigerant Moisture Content : Measure moisture with a sight glass test kit or log moisture indicator color; moisture in the refrigerant circuit forms acid that attacks copper surfaces and contaminates compressor oil; replace filter-drier if indicator shows wet. (k) Oil and Refrigerant Spectrographic Analysis : Submit samples for lab analysis for any detection of iron, copper, and aluminum wear particles from internal compressor components. (l) Diagnose the fault and rectify the defects detected in reasonable time. (m) Repair / replacement of defective minor spares such as sensor, relay, cable lugs, nuts, bolts, tube, fins, expansion valve etc are deemed to be included in the quoted rate.

M&L for Comprehensive periodical systematic maintenance and servicing charges for Cooling Tower of capacity 120 m3/hr - 01 Nos. which shall include the following :- (a) Cleaning of Cooling Tower inside and out side with cleaning agent and removing group of predominantly aquatic, photo-synthetic and nucleus-bearing organisms (algae), welding the damaged part of cooling tower, replacement of damaged cooling tower wooden honeycomb type fins, the fiber / MS sheet will be fixed by screwing nut bolt of suitable size, suitable size of strip welding with help of welding machine to extra support for fiber, spray painting with two coat of paint inside & outside after scraping old / pill paint, electrically disconnected of electric motor overhauling and servicing of cooling tower motor, replacement of bearing / bushes of suitable size, painting of motor, reassembling the complete repositioning of motor, connecting and testing on complete for smooth and trouble free running. (b) Inspecting Fan Blades for corrosion, erosion, or damage; repair / replacement of unbalanced fan blades which can cause generation of excessive vibration results in accelerating bearing wear and motor failure deemed to be included in the quoted rate.

(c) Check Fan Motor mounting, electrical connections, and current draw; current draw above rated nameplate value indicates mechanical resistance from bearing wear, blade fouling, or gearbox friction. If found any abnormality in motor winding / bearing / slots, repairing of the same shall deemed to be included in the quoted rate. (d) Inspecting Belt condition and tension on belt-driven fans : Replacement of worn or slack belts which can cause fan speed reduction and reduce airflow below design and setting of tension to avoid over-tensioned belts which can lead to accelerate bearing failure on both motor and fan shaft deemed to be included in the quoted rate.

(e) Checking Gearbox Oil Level and condition of gear-driven towers; Top up / replacement of gear oil as per manufacturer interval or when colour indicates oxidation or water contamination shall deemed to be included in the quoted rate. (f) Inspecting all spray nozzles for blockage, scale fouling, or cracking Repair / Replacement of clogged nozzles which create uneven water distribution across fill media, producing dry sections that reduce thermal performance and increase biological risk shall deemed to be included in the quoted rate. (g) Checking distribution header pipe integrity for scale buildup, corrosion, or joint leaks; Repair / Replacement of leaking distribution header pipe shall deemed to be included in the quoted rate.

(h) Inspect drift eliminators for damage, scale fouling, or displaced sections - Repair / replacement of damaged sections shall deemed to be included in the Quoted Rate. (j) Check Air Intake Louvers for blockage from debris, vegetation, or scale deposits ; Repair / Replacement of damaged air intake louvers which can cause restricted airflow reduces cooling capacity and increases fan motor load, raising energy consumption and accelerating mechanical wear deemed to be included in the quoted rate. (k) Inspect fan deck, walkways, stairways, and ladders for corrosion, cracks, or structural damage; Repair / replacement of deteriorated access structures of existing make and specification with spray painting with two coat of paint inside & outside after scrapping old / pill paint deemed to be included in the quoted rate. (l) Verify safety signage, PPE requirements, and chemical hazard labels are current and legible.

(m) Confirm system has been fully cleaned and disinfected cleaning requires physical disassembly of components and mechanical removal of scale, sediment, and biofilm before chemical disinfection shall deemed to be included in the quoted rate. (n) Check tower casing and cladding for corrosion, cracks, or seal failure - compromised casing allows uncontrolled air infiltration that bypasses fill media and reduces tower thermal efficiency below design. Inspect structural framework, support columns, and anchor bolts for corrosion; Repair / Replacement of deteriorated structures of existing make and specification with spray painting with two coat of paint inside & outside after scraping old / spill paint shall deemed to be included in the quoted rate. (o) Inspect fill media for scale buildup; Removal of Calcium, Magnesium, and Silica deposits which create insulating barriers that reduce heat transfer efficiency and progressively increase energy consumption by doing mechanical or chemical descaling before next operational cycle deemed to be included in the quoted rate.