REP/MAINT OF SOLAR HEATER AND IMPROVEMENT TO EXTERNAL WATER SUPPLY LINES, VALVES INCL MAINTENANCE OF PUMPSETS AND ALLIED ITEMS IN DOMESTIC AND TECHNICAL AREA AT AFS YELAHANKA

Material & Labour for maintenance / servicing of solar water heater, flat plate collector type, storage type upto 200LPD capacity, including complete cleaning of solar system i.e. tank and collector circuit, removal of dirt, dust and debris, cleaning of collector glass with suitable glass-cleaning solution, opening of cold & hot water connections, draining of deposited water, removal of mud/turbidity and flushing/cleaning with fresh water, checking and servicing of inlet/outlet valves, non-return valve, air vent, drain valve, float valve, temperature gauge and water connections, checking of electrical backup heater, thermostat, electrical connections and sacrificial anode, tightening of connections, checking collector glass holding arrangement and rectification of minor leakage in joints/connections, cleaning of tank exterior and associated pipework, testing of system for proper operation, complete all as specified and as directed.

Material & Labour for Descaling of Flat Plate Solar Collector (FPC) of Capacity 200LPD System (2 Collectors) using approved OEM-compatible descaling liquid, including isolation of the collector circuit, draining of water as necessary, opening/disconnection of required connections, circulation/application of approved descaling liquid through the absorber plate fluid passages, headers and risers of the flat plate collector for the required duration, removal of loosened/dissolved scale deposits, draining of descaling solution, thorough flushing with clean water until the collector circuit is free from descaling solution and scale deposits, restoration of all connections, filling and air removal, checking for leakage and testing for proper circulation and satisfactory operation, complete as specified and directed .

Material & Labour for Descaling of Flat Plate Solar Collector (FPC) of Capacity 100LPD System (1 Collectors) using approved OEM-compatible descaling liquid, including isolation of the collector circuit, draining of water as necessary, opening/disconnection of required connections, circulation/application of approved descaling liquid through the absorber plate fluid passages, headers and risers of the flat plate collector for the required duration, removal of loosened/dissolved scale deposits, draining of descaling solution, thorough flushing with clean water until the collector circuit is free from descaling solution and scale deposits, restoration of all connections, filling and air removal, checking for leakage and testing for proper circulation and satisfactory operation, complete as specified and directed

Supply & Fixing in repair 200 LPD capacity Flat Plate Solar Collector (FPC) complete with copper absorber plate having 9 fins, copper fluid passages/header and riser assembly, transparent toughened glass cover, insulated and weather-resistant collector casing, suitable thermal insulation and connection to existing solar water heating system, testing for leakage and proper circulation and commissioning, complete as specified and directed .

Supply & Fixing in repair 2 kW electrical backup immersion heater for existing solar water heater storage tank, complete with thermostat, mounting arrangement, gasket, connections, testing and commissioning complete as specified and directed .

S&F in repair toughened glass cover 1Mtr X 2 Mtr for Flat Plate Solar Collector (FPC), of suitable thickness, size and specification as per OEM requirements, including removal of damaged/broken existing glass, cleaning and preparation of collector frame, providing and fixing new toughened solar glass with suitable gasket/sealing arrangement, clips/beading/fasteners and all necessary accessories, sealing against ingress of water and dust, and testing for proper fitment and satisfactory operation, complete in all respects as per OEM recommendations and complete as specified and directed .

Supply & Fixing in repair EPDM rubber hose pipe (17"- 1 Pair), suitable for solar hot-water of capacity 200LPD including suitable hose clamps, connectors/adaptors, unions and all necessary accessories, cutting to required lengths, removal of defective existing hose where applicable, making connections to existing pipework/collector/storage tank complete all as specified and as directed .

Supply & Fixing in repair EPDM rubber hose pipe (15"- 1 Pair), suitable for solar hot-water of capacity 200LPD including suitable hose clamps, connectors/adaptors, unions and all necessary accessories, cutting to required lengths, removal of defective existing hose where applicable, making connections to existing pipework/collector/storage tank complete all as specified and as directed by Engineer-in-Charge.

Excavation in trenches in hard/dense soil not exceeding 1.5 mtr width and not exceeding 1.5 mtr deep for laying and getting out all complete all as specified and directed.

Returning, filling including spreading levelling watering and well ramming in layers not exceeding 25 cm thick in hard/dense soil all as specified and directed by Engr-in-charge.