operation and maintenance contract of electrical and mechanical installations at ndb songadh ( for 2 year period ) ( yr-2020-21 and 2021-22 ) , provision of uninterrupted power supply and maintenance ( routine & preventive ) of electrical & mechanical installations at ndb , songadh including repairs , attending complaints/faults/breakdowns and taking rectification action , ensuring serviceability/satisfactory working condition & maintenance of record/documentations etc as per the detailed specifications , terms & conditions covered under this contract on all days including sunday & holidays as and when required in three shifts . , comprehensive annual maintenance of wall mounted split type room air conditioners of following capacity of different makes by visiting once in a month and attending any numbers of breakdown calls including carrying out preventive maintenance such as cleaning , repairing/ replacement consumable items , piping and electrical components with genuine materials , taking rectification action , ensuring servicing/ satisfactory working condition of the system as per the detailed specifications , terms & conditions covered under this contract . a ) 1 . 5 tr capacity 230v , 50 hz ( qty = 02 nos ac unit x 24 month = 48 job ) ( note: rate should be quoted per ac unit per month ) , execution / carryout the work for items covered / listed in cpwd scheduled of rates ( electrical ) -2018 published by cpwd as per cpwd specifications for an amount of rs . 50 , 000/- [excluding gst] as required . ( agency has to execute schedule item listed in cpwd s/r ( electrical ) 2018 as and when required by aai . may please refer nit clause 23 ( e ) , page no . nit - 4 & 5 for quotating of rate for this item no . 24 )