maintenance of electronic installation and fan and other electrical services in pwd offices under pwd electrical division south during 2023-24. ( sh- replacement of consumable materials in existing water cooler installed at various pwd offices. ) -ro membrane 40 x 21 3 particulate filter 20 4 activated carbon 20 5 ro membrane 80 gpd 6 particulate filter 10 7 activated carbon 10 8 alkaline filter for water cooler 9 alkaline filter 10 sitc of storage water cooler cum purifier 150 / 150 / 100 ltr capacity ( 150 ltr storage, 150 ltr cooling & 100 ltr per hr purification ) with inbuilt ro+uv having 7-8 stages ultra violet based purification system suitable for operation on 220v ±10% v ac, 50 hz with power consumption 2200 watt ±10% providing water oulet temperature at 17 degree c° at at the flow of 150 lph having permeate production capacity of 100 lph with autoflush at every one hour for one minute for effectively preventing post microbial contamination in the storage tank inlet and outer body dimension 815x635x1530 mmand storage tank of 150 litre with puf thermal insulation. compressor make should be of kirloskar / emerson / tecumseh and regrigerant should be of r134a ( eco friendly ) andno of faucets should be 3 nos ( 2 nos for cold water and 1 nos for normal / hot purified water minimum input pressure of 0.4 kg / cmsq and maximum input pressure of 2.0 kg / cmsq ) . the storage tank and outer body materialshould be of ss304 only. 11 supplying installation testing and commissioning of r.o water purifier having 8 ltrstorage capacity suitable for operation on 230v / 50 hz ac supply, purifies germs and chemicals etc complete as reqd.