COMPREHENSIVE MAINTENANCE TO CENTRAL AC PLANT SYSTEM OF CPSS AT NO. 2 AFSB MYSORE

Amount

Comprehensive maintenance of central A/C plant with control panel, 2x24 TR capacity installed at CPSS bldg complete including all material and labour for spares, lubricants, checking leakage of refrigerant gas, replacement of glands, 'O' ring gaskets, nuts, bolts, washers and routine checks like oil level, V belts, electrical control wires, cleaning of filters, greasing the motor, replacement of gland packing to pump, indicating lamp to panel etc, but excluding repairs to the plants all as specified and directed NOTES :- Spare parts required for replacement during the maintenance period shall be measured & paid separately "UNDER SUPPLY ONLY RATES"

Supply and fix in repairs MCCB, 04 Pole, 250 Amps, 415 Volts, 50 Hz, breaking capacity 36 KA, adjustable thermal setting, with spreader links on both sides complete all as specified and as directed.

Supply and fix in repairs MCCB, 03 Pole, upto 100 Amps, 415 Volts, 50 Hz, breaking capacity 16 KA, fixed magnetic setting, with spreader links on both sides complete all as specified and as directed.

Supply and fix in repairs MCB - 04 Pole, 415 volts, 40 Amps, 50 Hz, 10 KA rupturing capacity, confirming to IS/IEC 60898-1, 'D' series, connecting, testing and commissioning complete all as specified and as directed.

Supply and fix in replacement of Fully automatic Star-delta (FASD) starter suitable for 12.5 HP pump set, 3 Phase, 415 V, 50 Hz, relay range 9-15 Amp, having MN relay with single phase prevention feature, connecting to existing pump set and testing complete all as specified and directed.

Material and Labour for dismantling of electric driven horizontal induction motor of capacity 12.5 HP of any type and make by engaging sufficient man power and suitable T&P to ensure safety of pump-motor including disconnecting electric connections, dismantling of motor, taking out the burnt windings, cleaning the slots and rewinding the same with copper winding wire of existing guage and quantity (as per original manufacturer design) including replacement of all damaged parts i.e. bearing, bush, thrust plate, connector plate, insulating materials such as insulating sheets, sealing compound and reassembling the motor after varnishing, heating/drying, greasing of moving parts and reinstallation of the motor in original location, checking the alignment, making proper electric connection, testing for smooth operation, complete all as directed

All as per item No. 6, here in before but but 5 HP capacity

Material and Labour for pressure leakage testing of complete system of Central AC plant using dry Nitrogen gas by isolating the cooling coil from both ends of high side and low side, pumping down the refrigerant gas, keeping in safe condition for refill, charging the dry nitrogen gas for pressure leak test, after detecting leak point release the nitrogen gas, rectifying the leak point by means of soldering/ brazing and connecting the cooling coil with system, vaccumised the complete system and re-charge the system by refrigerant, top up of additional quantity of refrigerant gas if required, etc., including testing and commissioning to the required cooling effect complete to the entire satisfaction of the Engineer-in-Charge all as specified and as directed. Notes :- (a) Cost of Nitrogen gas required shall deemed to be included in the quoted rate. (b) Refrigerant gas required shall be measured and paid separately under respective item of this Schedule.

Material and Labour for descaling the shell and tube condenser of 2x24 TR capacity chiller of AC plant by circulating the descaling chemical (scale gun/ HCL acid) through condenser tube by pressure feeding method after disconnecting condenser water lines and opening the end covers of both side, brushing condenser water tubing, removing the scales, normalising the copper surface by circulating chemical agent, refixing/ assembling all dismantled parts, replacing gasket set etc., testing, running the system to the required cooling effect complete to the entire satisfaction of the Engineer-in-Charge all as specified and as directed.

Material and Labour for cleaning/ servicing the AHU of central AC plant, by pressure air method using air blower and cleaning 6 rows of chilled water cooling coil section 12 FPI with cleaning solution, descaling by chemical agent, cleaning the AHU filter by using high pressure air, greasing to AHU blower shaft/ motor bearing for smooth functioning, cleaning the AHU base tray, etc., complete to the entire satisfaction of the Engineer-in-Charge all as specified and as directed.

Material and Labour for cleaning & Servicing of Cooling Tower by pressure air method using air blower and cleaning with water based cleaning solution, descaling by chemical agent, cleaning fan blades, fins by using high pressure air, cleaning the collector tank, etc., complete to the entire satisfaction of the Engineer-in-Charge all as specified and as directed.

Material and Labour for checking of leakage in the chilled water pipeline from pump to plant at all joints and valves and arrest the leakage by replacing the gasket and tightening of nuts & bolts complete all as specified and as directed.

Material and Labour for checking of leakage in the condensor water pipeline from pump to chilling unit at all joints and valves and arrest the leakage by replacing the gasket and tightening of nuts & bolts complete all as specified and as directed.

Supply of Regrigerant gas R-410 in manufacturer's sealed container and filling/topup complete to the entire satisfaction of the Engineer-in-Charge all as specified and as directed.

Supply only copper copper refrigerent tube/pipe of size 5/8 x 1 1/8 for suction & discharge lines

Supply only filter for compressor

Supply only drier

Supply only Pressure guage

Supply only Thermometer with stem suitable for AC plant suitable on working 0˚C to 50˚C as per OEM.

Taking out old unservicable preventor, supply and fix Single Phase Preventor relay (SPP) suitable for three phase star delta starter complete all a as directed by Engr-in-Charge Make : Minilec or equivalent as approved by Accepting Officer

Material and Labour for replacement of earthing complete with galvanised iron earth plate electrode of size 600mm x 600mm, 6mm thick, buried directly in ground vertically at a depth not less than 2.25 metres deep below normal ground level with top edge of the earth plate not less than 1.5 metres below normal ground level and filling with mixture of common salt and charcoal surrounded all sides 15cm thick (minimum) and connecting electrode with galvanised iron wire of 4 mm dia by means of bolts, nuts, check nuts and washers made up of galvanised iron or steel and protected by light grade 15mm dia galvanised iron pipe connected to main switch board or main control board and watering arrangement with 20 mm bore GI medium grade pipe, GI funnel with wire mesh, including PCC 1:3:6 type C-1 pit with cover made of RCC 1:2:4 type B-1, reinforced with welded steel wire fabric not less than 4 kg per sqm with handle and angle iron frame, including necessary excavation and earth work, returning filling and disposal of surplus soil to a distance not exceeding 50 m all as specified and as shown in electrical plate No. 3 of MES schedule part-1 connected to test point terminal all as specified including taking down old earthing & testing new earthing on completion all as directed.

Material and Labour for replacement of earthing complete with galvanised iron earth plate electrode of size 600mm x600mm, 6mm thick, buried directly in ground vertically at a depth not less than 2.25 metres deep below normal ground level with top edge of the earth plate not less than 1.5 metres below normal ground level and filling with mixture of common salt and charcoal surrounded all sides 15cm thick (minimum) and connecting electrode to galvanized iron strip 32x6mm as earthing lead by means of bolts, nuts, checks nuts, washers made of galvanized iron or steel and protected by 40mm dia galvanised light grade iron pipe connected from plate to main switch board, Panel Board, test point terminal or main control board and watering arrangement with 20 mm bore GI light grade pipe, GI funnel with wire mesh, including PCC 1:3:6 type C1 pit with cover of RCC 1:2:4 type B1, reinforced with welded steel wire fabric not less than 4 kg per sqm with handle and angle iron frame, watering arrangement with 20 mm bore GI medium grade pipe, GI funnel with wiremesh, filling with mixture of common salt and charcoal, necessary excavation in earth work in any type of soil, refilling, removing soil and including test point, commissioning testing new earthing on completion all as directed.

PLATINUM CONSTRUCTIONS

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