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SUPPLY INSTALLATION TESTING COMMISSIOINING OF FREE COOLING SYSTEM POWERED WITH230 V AXIAL FLOW FANS OF AIR DELIVERINGCAPACITY OF 1200 ± 200 CFM AT INLET AND 1200CFM ± 200 CFM AT OUTLET I/C S/F SUITABLEINVERTER FOR THE ABOVE SYSTEM FOR THE BACKUPVOLTAGE OF 48 V D.C AS PER THE DETAILEDSPECIFICATION. THE FANS SHOULD BE MOUNTEDIN A RAINPROOF HOUSING OF G.I SHEET NOT LESSTHAN 18 SWG SUITABLY BEND DOWNWARDS I/CPAINTING , S/F FILTERS, GRAVITY BASED DAMPERSIN THE OUTLET, WARM PROTECTION NET, I/CMAKING OPENING IN THE BTS SHELTER, MAKINGGOOD THE DAMAGES MADE, S/F MICROPROCESSED BASED CONTROLLER SUITABLE FOR THEFREE COOLING SYSTEM WITH AUTO / MANUALCONTROLS, RS 232 PORT FACILITIES,POWER &CONTROL WIRING WITH SUITABLE SIZE OF COPPERCONDUCTORS, EARTHING, TERMINATION, S/F OFTHERMOSTATS TO SENSE THE AMBIENT, BTSTEMPERATURE, HUMIDISTAT ETC.AS PER THEDETAILED SPECIFICATION, TESTING &COMMISSIONING ETC COMPLETE AS REQUIRE