Public Works Department Tender

Design, Supply, Installation, Testing and Commissioning of Ultra Violet Germicidal Irradiations, (UVGI) System to maintain Indoor Air Quality (IAQ) through online monitoring system installed on cooling coil , microbe disinfection of various sizes as per site selection chart of cooling coil for Energy Saving as per Specifications consisting of T5 Lamps having 15 mm diameter UV Lamps fabricated with special high transmission Quartz glass of length 36/48 inch respectively as per the requirement at the cooling coil size having high output , hot cathode medium by pin type.. The Average Life of UV lamps Shall be 12000 hrs. The UVGI System shall consist of UV lamps, parabolic reflector (Reflector only in case of AHU mounting) with its mounting assembly and control panel. The Control Panel for the entire UVGI System to be mounted outside the AHU and should consists of ballast, MCB SP, Indication lights, Hour meter to show real running time of the entire system including providing & fixing all necessary material for the frame structure, top & bottom mounting cups, pre drilled vertical telescopic aluminum channels or guide grills, screws etc. as required. The entire system should be installed under the guidance of OEM/ Channel partner for proper installation & healthy functioning, The system should consist of following features:-

(a) They shall produce 95% of their energy at 254 nm. UV lamp shall not produce ozone or other secondary contamination and to substantiate this the lamps shall be tested by an approved Indian lab for output performance of 254 nm. Lamp manufacturer to submit the certificate from this lab. The lamp shall be high output type and should not be lower than 800 mA. The UV intensity of each lamp shall be 800µW/cm² when measured at a horizontal distance of 10 inches from the lamp. The UV Lamps manufactured or sourced from China shall strictly not be acceptable. The contractor shall specify the make and origin of the UVGI system being offered. (b) UVGI System shall be provided with the primary aim of achieving substantial reduction in bacteria count, both airborne and on cooling coil surface. The UVGI system shall be designed to cover the entire face area of the cooling coil when installed in the AHU. The face velocity of dehumidified air over the coil will be 500 FPM or lower. When installed in the duct the face velocity can be higher.

(c) The UVGI system shall achieve near total elimination of bacteria/biomass on the cooling coil. Subsequently, the UVGI system may be kept in ON position 24/7 (even when the AHU is switched off or is not in operation) to ensure that the bacteria does not reappear. (d) The UVGI system shall be suitable to operate with 230V+/-10V, single phase A.C. supply. (e) When Installed in the AHU, the UVGI system shall be installed downstream of the cooling coil and the selection and placement of the UVGI system shall ensure full irradiation of the entire face area of the cooling coil when installed in the AHU. (f) The UVGI System shall be free standing and be mounted in such a manner that lamps are in perpendicular position to air flow using Aluminum arrangement to be corrosion free. (g) Output verification shall be carried out in accordance with the general provisions of IES lighting hand book, 1981 application volume, total output per one inch are length shall not be less than 10u W/cm2 at one meter.