Rate contract for maintenance/repairs to Central Heating System of MHED Kashmir.

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 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 6-8 hrs with the help of a jet 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 6-8 hrs with the help of a jet 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. 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.

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, 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

Cleaning/Servicing of Radiators: 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 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

Installation, testing & commissioning of Radiators (available with the department) or shifting of the same at various locations (damaged locations/new locations). The job includes supply, installation, testing and commissioning of M S “C” Class Hot water piping of sizes as per site requirement, including fittings such as bends, shoe bends, flanges, nipples, sockets, unions, nuts, bolts, washers etc complete in all respect. All civil works such as making openings in walls / floor / ceilings, finishing and restoration of the same and other damages, caused during execution of work at the site, to its original decor are in the scope of this job. The pipes shall be welded together by means of electric arc welding conforming to the relevant IS standards & using electrodes of repute.

Providing & fitting of (15 mm) supply & return valves of radiators along with allied fittings and fixtures to replace the defective valves (as per sample).

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

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