PREVENTIVE MAINTENANCE OF CENTRAL HEATING SYSTEM AT MHED COMPLEX SHALTENG SRINAGAR FOR THE YEAR 2024-25

Amount

Preventive maintenance of 01 Lac Kcal/Hr Hot Water Generator (“Thermax” make): The job includes disassembling of 01 Lac Kcal/Hr Hot Water Generator from the circuit, removing of coil by dismounting burner assembly followed by dismounting the front plate of hot water generator by means of chain pully block & tripod. The job further includes cleaning of the extracted coil from soot, carbon deposits, debris from coil & shell of the water boiler using wire brushes etc. The job further includes descaling of helical coil by way of circulating a solution of descaling compound (of reputed make) and water of required strength continuously for 4-6 hrs with the help of a pump through it. The job also includes dismantling and re-assembling of the burner gun, complete cleaning of nozzles / cleaning of diffuser plate etc. complete in all respects.The job includes replacement of all seals, gaskets, asbestos rope, defective nuts & bolts etc. All tools, tackles along with consumables & allied items shall be provided by the contractor.

Preventive maintenance of 02 Lac Kcal/Hr Hot Water Generator (“Thermax” make): The job includes disassembling of 02 Lac Kcal/Hr Hot Water Generator from the circuit, removing of coil by dismounting burner assembly followed by dismounting the front plate of hot water generator by means of chainpully block & tripod. The job further includes cleaning of the extracted coil from soot, carbon deposits, debris from coil & shell of the water boiler using wire brushes etc.The job further includes descaling of helical coil by way of circulating a solution of descaling compound (of reputed make) and water of required strength continuously for 4-6 hrs with the help of a pump through it. The job also includes dismantling and reassembling of the burner gun, complete cleaning of nozzles / cleaning of diffuser plate etc. complete in all respects.he job includes replacement of all seals, gaskets, asbestos rope, defective nuts & bolts etc. All tools, tackles along with consumables & allied items shall be provided by the contractor.

Replacement of refractory of 01 Lac Kcal/Hr Hot Water Generators: The job includes complete removal of old damaged refractory and thorough cleaning of refractory base. Mild steel hold-fasteners, wherever required, shall be welded to the refractory base. The old damaged refractory is to be dumped in the nearest municipal waste bin. The new refractory shall be laid in castable refractory cement of reputed make. The job also includes repairs to the front plate, if required. The job further includes replacement of all seals, gaskets, grease, asbestos rope, asbestos felt, defective nuts & bolts, probes, sensors, meters etc. The boiler shall be re-assembled, tested and re-commissioned after cleaning.

Replacement of refractory of 02 Lac Kcal/Hr Hot Water Generators: The job includes complete removal of old damaged refractory and thorough cleaning of refractory base. Mild steel hold-fasteners, wherever required, shall be welded to the refractory base. The old damaged refractory is to be dumped in the nearest municipal waste bin. The new refractory shall be laid in castable refractory cement of reputed make. The job also includes repairs to the front plate, if required. The job further includes replacement of all seals, gaskets, grease, asbestos rope, asbestos felt, defective nuts & bolts, probes, sensors, meters etc. The boiler shall be re-assembled, tested and re-commissioned after cleaning.

Repairs to the Fan Coil Unit by way of cleaning & lubrication of motors. The job includes brazing of copper coils at leaking spots & testing of FCU’s for satisfactory performance. The job further includes replacement of all bearings of blower assemblies.

Rewinding of burnt out 03-phase motor 5 HP, 03 phase, 50 Hz circulation pumps at Main Boiler House. The job includes removing of electrical connections, removal of nut bolt fittings of the pump, taking the same to the workshop for rewinding. The old burnt winding of the motor needs to be removed using proper tools and tackles & rewinding with high quality copper wire of suitable gauge and then impregnation of same with proper qty of varnish and drying using oven etc. The unit needs to be checked fully and the bearings needs to be replaced if necessary. The unit has to be assembled and checked for proper functioning and brought back to boiler house at Shalteng. The same needs to be fitted back using proper tools and tackles and tested on the boiler after making all required electrical fittings. All tools/ tackles, to & fro carriage required for the job is to be arranged by the contracting agency.

Providing & fitting of 20 mm dia. ball valve (drain valve) including nipples, sockets, unions, tees, elbows, etc complete in all respects, duly tested for any leakages and rectification of the same if any, to replace the damaged valves.

Providing & fitting of 25 mm dia. ball valve (drain valve) including nipples, sockets, unions, tees, elbows, etc complete in all respects, duly tested for any leakages and rectification of the same if any, to replace the damaged valves.

Providing and fitting of new FCU of capacity 4500kcal/hr at pantry of Executive Engineer office . The job includes dismantling of old FCU & replacing it with new one.The job also includes fitting of FCU on the wall byprovidingnecessary brackets and fitting.The job includes connecting of FCU with hot water system by way of providing and fitting 20mm dia triple layer PPR pipe of required length asper site condition.the job also includes hot plate welding of PPR pipe and necessary fittings like Tees, Bends , adaptors etc as per site conditions. The job includes making good all the damages in the walls to maintain aesthetic appeal of the walls.

Supply, installation, testing and commissioning of following Hot Water Radiators double panel double convector type complete with all accessories at Circle Office and PSCCR and operators room .The job includes dismantling of Old Hot Water Radiators and replacing it with new one.The radiators shall be made out of anti corrosive manganese steel and designed for working pressure up to 10 kg/cm2 and of heavy duty type. The radiators should be painted with a three step process i.e., first it shall be coated with zinc / manganese phosphate to improve durability and corrosion resistance, followed by dipped cathodic electroplating and finally applying an epoxy powder coating with subsequent baking to give a high quality decorated gloss finish that won’t pale or fade. The radiators must be energy efficient & should conform to DIN EN442 standard. The capacity of each radiator shall be measured at temperature drop from 750C to 650C during the winter season and at room temperature of 240C. The radiators shall be provided with concealed brackets, air vents and plugs. The bleed valve shall rotate around a fixed point. The radiator shall be provided with a drain plug at the bottom with inlet & outlet manifolds for two pipe system on both the sides. The radiator shall be complete with top grill and end/side panels with rounded bottoms for user safety with no visible screws. Each radiator should be provided with OEM or equivalent air purging & radiator control valves (inlet valve→ open type & outlet valve→ lock shield type). The radiators are to be fitted using flexible pipe of required length as per site requirement. The firm shall supply radiators of equal or higher capacity within the contract value depending upon the availability. However maximum tolerance up to ± 5% of heat output of the radiators shall be allowed only in case the firm justifies non availability of equal capacity radiators in the market & shall be permitted in such areas where multiple radiators are to be installed. In such cases the firm shall have to supply and install extra radiator(s) along with control valves and the pipe connections to compensate for the total heat output of feasible area without charging extra amount. The radiators should have an aesthetic appeal. The successful bidder shall install radiators of equal or higher capacity within the contract value depending on the availability. The old Hot Water Radiators shall be returned to Divisional Store after replacing it with New Hot Water radiators.All civil works such as making openings in walls flloor cielings restoration of the same and other damages caused during execution of the work at site, to its orginal decor are in the scope of work . The firm shall also provide necessary piping , fittings and bends for the installation of the Hot Water Radiators if required. A certificate from the manufacturer or his authorized dealer must accompany the radiators clearly stating the heat output of each radiator along with a certificate to the effect that the heat output of radiators conforms to DIN EN442 standard. The successful bidder shall have to produce a brochure/ technical specifications of the radiator (of make quoted) of OEM clearly stating weight, pitch, heat output etc

3500 Kcal/Hr.

3000 Kcal/Hr.

Providing & fitting of Air Purge valve of radiators to replace the damaged valves at various locations.(as per sample) (set of two valves).

Providing & fitting of Auto Air Release Valve 15mm & along with 20mm diameter ball valve including nipples, sockets, unions, tees, elbows, etc complete in all respects , duly tested for any leakages and rectification of the same if any, to replace the damaged valves.

Servicing of circulation Pump of capacity 5H.P. by way of disassembling of pumping unit and then replacement worn out nuts/bolts, greasing of bearing and gland packing etc.the job includes assembling of pumping unit and testing thereof

Providing & fitting of Fuel connections wire braided (both supply & overflow to and from burner assembly) to Hot Water Generators to replace the damaged ones as per sample

Cleaning/Servicing of Radiators at various locations at M&HED Complex Shalteng: The job includes dismantling of radiators from the walls using proper tools & tackles & cleaning of all the dirt, scale and deposits same by passing pressurized water/suitable cleaning co,mpound using water pump or any other source of high pressure water supply. The radiators are to be re-installed at their respective places after completing the cleaning process and testing the same for leakages, if any including replacement of damaged nuts / bolts / fixtures etc. The tools / tackles required for the job along with consumables shall be provided by the contractor / firm. The cleanliness of the surroundings of the radiator is also the responsibility of the contractor. A dip tray of proper size shall be arranged by the contractor for use while opening & reinstallation of radiators.

MIDZ MULTI VENTURES (BID ID -2188503)