REPAIR / REPLACEMENT OF SUMMER APPLIANCES AT INS HAMLA AND MANUAL RESCUE AND OPERATION RESCUE OF SWIMMING POOL, DG SET, PUMP HOUSE ERANGLE AREA, PUMP HOUSE HAMLA, CENTRAL AC PLANT HAMLA AT INS HAMLA UNDER GE (NW) BHANDUP

Amount

Supply & Fix new hermetically sealed compressor in existing window type AC, 1.5 Ton capacity including intial filling of refrigerant gas to the required pressure, brazing, electric/piping connection etc complete all as specified and directed Make : Voltas/Shriram/Tecumesh/Kirloskar/Hitachi/LG/Blue Star

All as per item No.1.00 above but for split type AC 1.5 Ton capacity

All as per item No.1.00 above but for split type AC 2 Ton capacity

All as per item No.1.00 above but for Water cooler 40/80 liters capacity

All as per item No.1.00 above but for Water cooler 80/120 Litres capacity Note for item Nos. 1 to 5 :(i) The Contractor shall submit original purchase voucher alongwith manufactures test certificate and Guarantee Card etc (ii). The quotd rates shall be deed to include to undertake Guarantee of one year from certified date of completion by the contractor for free replacement of compressor and /or rectification of the same (including charging of gas) all as directed by the GE in case any defects are noticed (during Guarantee period of 01 year) due to any reasons whatsoever may be

Taking out window type air conditioner of capacity upto 1.5/2 TR of any make/type after disconnecting of electric supply and removing dust by using blower and cleaning the condenser coils and components by using water and caustic soda, checking and replacing the spares like relay, capacitors, thermostat, fan motor, blades & blower and including servicing,overhauling and charging of refrigerant and testing including fixing back in its original location complete all as specified and directed.

Taking out split type air conditioner (both indoor and outdoor units) of capacity upto 1.5/2 TR of any make/type after disconnecting refrigerant pipes, drain pipe and electric connection and removing dust by using blower and cleaning the condenser coils and components by using water and caustic soda, checking and replacing the spares like relay, capacitors, thermostat, fan motor, blades & blower and including servicing, overhauling and connecting of refrigerant pipe,drain pipe and charging of refrigerant and testing including fixing back in its original location complete all as specified and directed. NOTE FOR ITEM NOS. 6 & 7 (i) Spares will be measured and paid separately as supply only. (ii) Refrigerant gas will be measured and paid separately as supply only.

Replacement of corroded body base tray & connected portion of window type AC upto 2 Ton capacity (base tray made out of M S Sheet 18 Gauge and other portion with MS sheet 20 Gauge) including motor mounting frame, nuts/bolts of suitable size and spray painting with two coats of synthetic enamel paint over one coat of primer including replacement of damaged insulation etc complete all as specified and directed. Note : For replacement of the body, cost of dismantling of compressor etc including reassembling and gas charging etc as required at site shall also be deemed to be included in the quoted rates.

Taking out corroded body & frame of water cooler of 40/80 Litres storage capacity and replacement with new angle iron frame of size 40 x 40 x 6mm and cooler body with MS/CRCA sheet of 20 gauge, painting with two coats of synthetic enamel paint over a coat or red oxide primer by spray painting, including reassembling & refixing of all parts etc complete all as specified and directed .

Supply only blower fan motor for 1.5/2 TR capacity window type air conditioner complete all as specified and directed.

Replacement of fan blades of motor for water cooler upto 150 Ltr capacity including testing etc complete all as specified and directed

Supply only blower fan blade for 1.5/2.0 TR split type air conditioner complete all as specified and directed.

Supply only blower drum of window type AC upto 1.5/2 ton capacity complete all as specified and directed. Make: Voltas/Carrier/Blue Star/LG.

Replacement of PVC cover grill of window type AC upto 1.5/2 ton capacity complete all as specified and directed.

Supply only starting capacitor 60 to 80 MFD for water coolers complete all as specified and directed.

Supply only starting capacitor 80 to 100 MFD complete all as specified and directed.

Supply only starting capacitor 100 to 120 MFD complete all as specified and directed.

Supply only running capacitor of 36/45 MFD complete all as specified and directed.

Supply only relay for window type AC upto 1.5/2 Ton capacity complete all as specified and directed.

Supply only relay for Split type AC(Non Inverter Type) upto 1.5/2 Ton capacity complete all as specified and directed.

Replacement of relay for Water Cooler of upto 60 to 150 Litre storage capacity, complete all as specified and directed.

Supply only thermostat switch for window type/split type AC(non inverter type) upto 1.5/2 Ton capacity complete all as specified and directed. (Make : INDOFOSS/RANUTRAL)

Taking out existing unserviceable thermostat switch of water cooler and Supply & fix new thermostat switch for water cooler of any capacity including testing etc complete all as specified and directed. (Make:INDOFOSS/RANUTRAL)

Supply and fix in repairs blower motor capacitor 6 MFD etc for water coolers complete all as specified and directed. (Make : ASIAN/KEIL/EPCOS)

Supply only over load protector No 1022 in window type AC upto 1.5/2 ton capacity complete all as specified and directed.(Make : USHA/ RANUTRAL)

Taking out existing unserviceable over load relay and supply & fix new over load relay in water cooler upto 150 ltrs capacity etc complete all as specified and directed.

S & F in repairs sheet metal enclosure with 3 pin 20 Amp earth plug & socket, also with and including single pole MCB of 20 Amps, 240 Volts, 'C' Series, 10 KA etc complete all as specified and directed.

Taking down carefully split type AC upto 2 Ton capacity & refixing inner & outer unit at new location alongwith existing frame work, bracket, refrigerant tubing, cable, stablizer etc and making good existing surface to match with the adjoining surfaces etc complete all as specified and directed.

Supply, fixing, clamping and jointing copper tubing in replacement of 3/8" dia for suction line and for liquid discharge line duly insulated with suitable insulation material for split AC including necessary soldering, flaring work, jointing, testing etc, making hole in wall for passing though pipe and making good to the disturbed surface to match with the adjoining surfaces etc complete all as specified and directed.

Supply & Lay PVC Nylon braided pipe 20 mm bore heavy duty including fittings to drain out condensed water of split AC including cutting of floor / wall & making good after laying of pipe to match the existing surface etc complete all as specified and directed.

Supply & fix in repair, push cock / lift cock 15mm bore of brass, chromium plated, ISI marked for water cooler of any capacity etc complete all as specified and directed.

Supply and fix in repair 12mm dia flexible PVC connection pipe upto 600mm long with brass nuts & washers at both ends suitable for water cooler etc complete all as specified and directed.

Supply and fix water tray made out of GI sheet 2 mm thick for water cooler any capacity with out let system connection provided with and including PVC nylon braided pipe of 20 mm dia upto 3 mtr length and also connecting to drain pipe etc complete all as specified and directed.

Supply & fix PVC pipe 25 mm bore with and including fittings and necessary saddles fixed on wall etc for outlet drain etc complete all as specified and directed.

Removing existing unserviceable electronic circuit control board of split AC unit upto 2 ton capacity and supply and fixing new electronic PCB & display board kit in the indoor unit including testing etc complete all as specified and directed. Make : Voltas/Bluestar

Repairing existing unserviceable electronic circuit control board of split AC unit upto 2 ton capacity and fixing in the indoor/outdoor unit including testing etc complete all as specified and directed. Make : Voltas/Bluestar

Supply only remote sensor handset suitable for split AC upto 2.0 ton capacity(Of Existing make of AC only)etc complete all as specified and directed.

Supply and fix in repair remote sensor plate suitable for split AC upto 2.0 ton capacity etc complete all as specified and directed.

Supply and fix in repairs multipurpose door lock with duplicate key of water cooler of any make & capacity etc complete all as specified and directed.

S & F in repairs 15mm bore gun metal, globe or gate valves, with iron wheel head, screwed both ends for iron pipes etc complete all as specified and directed.

S & F in repairs 15mm bore ball brass valve high pressure with polythene float & fly nut screwed for iron pipes etc complete all as specified and directed.

Supply only refrigerant (R-134A, R32, R-410A) gas as per requirement complete all as specified and directed.

Supply and fixing sediment filter for blue star water cooler upto 20-25 inch length 40/80 ltrs capacity

Supply and fixing Carbon filter for blue star water cooler upto 20-25 inch length 40/80 ltrs capacity

Supply and fixing sediment filter for Voltas water cooler upto 10-15 inch length 40/80 ltrs capacity

Supply and fixing Carbon filter for Voltas water cooler upto 10-15 inch length 40/80 ltrs capacity

Supply and fixing SV Valve HNS No - 84811000

Supply and fixing UV lamp HNS No - 85044090

Supply and fixing LED HNS No - 85394900

Supply and fixing PCB for water cooler Suitable for Bluestar 80/40 Lts Storage capacity

Supply and fixing PCB for water cooler Suitable for Voltas 80/40 Lts Storage capacity

Supply and fixing UV Sensor suitable for bluestar/voltas storage water coolers

M & L For Writing Letters Or Numbers or Figures by Thick Paint in any surface Of EM Installations with Block roman,Italic or Indian letter style n. Exc 30 cm height complete all as specified and directed by the Engineer-in-Charge

Manual operation and Rescue operation and maintenance of swimming pool and its pump sets along with electrical panel board and chloronome plant including their periodical maintenance and repairs with consumable items shall be measured separately as supplied only all as specified in onr operator one shift of 8 hours consisting of the following :- (a) Vertical type pressure filter with 1/2" dia nozzle, complete with pumping set monoblock with 3 HP 3 phase electric motor complete-2 Nos (b) Pumping set mono block with 5 HP induction motor electric driven for pressure filter- 2Nos (c ) Suction sweeper trolley mounted 2' wide complete with pumping set monoblock with 3HP, 3 phase electric motor complete (d) Air compressor 125 cubic feet air per minute driven by 5HP induction electronic motor 3 phase, 415 Volts, 50 Hz including DOL starter etc complete -1 No. (e) Electrical control LT panel board complete with starter switches, MCB etc, all as specified and directed by Engr-in-Charge

Supply only copper sulphate of super quality ISI Marked complete all as specisified and directed.

Supply only aluminium potash of super quality ISI Marked complete all as specisified and directed.

Supply only Soda Ash of super quality ISI Marked complete all as specisified and directed.

Supply only stable bleaching powder (calcium hypochloride with chlorine content not less than 30%) as per IS: 15738 : 2007 and 1065 : 1989 Marke : M/s Sree Rayalaseema Hi-Strength Hypo Ltd or Grasim industries Ltd or Bengal Chemichal & Pharmaceuticals.

Attendiing day to day complaints arises on water supply installation, swimming pool and also attened internal Electric breakdown such as light, Fan, Switch socket points etc. at INS Hamla area and NSB area by employing one Electrician in a Shifts for 08 hrs each shift (02 Shift0 for comprising replaceing of switches, sockets, Light fittings, starter, choke, Lamp holder, damaged wiring, ceiling fan, MCB, MCCB, etc. for making serviceable complete all as required at site or as directed by Engr-in-Charge Note the items for the replacement shall be provided by department.

Manual Rescue and Operation Rescue including repairs as well as A-Check(Daily Routine Chek as per manufacturer instructions) with all consumables parts (excluding major assembly/items/jobs which shall be measured and paid separately as supplied only under concerned items and periodical maintenance of the following diesel engine driven generating set with 16 hrs operation of two shift with one operator per shift and also maintain the water supply pump dug well near MES office and NSV area complete all as specified and directed. (a) SET No 01 :- Engine Make :- Kirloskar, Make of Alternator : Greaves Power, Capacity : 160KW/200KVA, Location : 'B' Zone INS Hamla (b) SET No 02 :- Engine Make :- Kirloskar, Capacity : 127 BHP, Make of Alternator : Kirloskar Electricals, Capacity : 80KW/100KVA, Location : A' Zone INS Hamla (c) Set No - 03:- DG Set - Engine Make :- Kirloskar , Make of Alternator : Greaves Power, Capacity : 80KW/100KVA, Location : NICA INS Hamla (d) Set No - 04:- DG Set - Engine Make :- Kirloskar , Make of Alternator : Kirloskar Electricals, Capacity : 50KW/62.5KVA, Location : 'D' Zone sub stn INS Hamla (e) Set No - 05:- DG Set - Engine Make :- Kirloskar, Make of Alternator : Kirloskar Electricals, Capacity : 50KW/62.5KVA, Location : 'SE-III Bldg INS Hamla (f) Set No - 06:- DG Set - Engine Make :- Kirloskar Cummins, Make of Alternator : Kirloskar Electricals, Capacity : 8KW/10KVA, Location : MAP Pump House INS Hamla

Material for carrying out 'B' check for 100 KVA DG set all as per manufacturers instructions. Location: '' A Zone - 1 No, Note : Rate quote shall be deemed to be inclusive of spares and filters but excluding engine oil.

Material for carrying out 'B' check for 62.5 KVA DG set all as per manufacturers instructions. Location: SE-III - 1 No & D Zone - 1 No Note : Rate quote shall be deemed to be inclusive of spares and filters but excluding engine oil.

Supply Only Engine oil 20W 40

Supply only coolent for 200/100/62.5/10 KVA DG set complete all as specified and directed

Supply only Maintenance free sealed Lead-acid battery 12V DC started of capacity 120-150 Ah with suitable existing dimention size for 62.5/100 KVA DG sets of Kirloskar make.The contractor shall brought the size of battery with existing can be fitted only Make : Exide/Amaron or any equivalent specification approved by the GE.

Supply only Maintenance free sealed Lead-acid battery 12V DC started of capacity 60-80 Ah with suitable existing dimention size for 10 KVA DG sets of Kirloskar make .The contractor shall bring the size of battery with existing can be fitted only Make : Exide/Amaron or any equivalent specification approved by the GE.

Manual Rescue and Operation Resue of electric driven pump set along with electrical panel board and chloronome plant including their periodical maintenance and repairs with all consumables and spare parts (excluding major Accessory / items / jobs which shall be measured and paid separately as supplied only under concerned items controlling the valves of distribution lines for distribution water in the area with one operator in a shift of 8 hrs for 16 Hrs in 2 (Two) shift for the following type/capacity of pumping set :- (a) Operation of One pump set mono block out of Two pump set : 05 HP - 02 Nos Location : FSB Erangle (Trata) Pump House.

Supply and laying in trenches/fixing to wall/ceiling or floor,Jointing, GUtubing,medium grade including all fittings, such as bends,elbows,tees,unions,short pieces,connectors,check nuts,caps,plugs etc complete all as specified and directed for the pipe dia size 80 mm bore.

All as per item No 69.00 above but 50 mm bore.

Supply only Butterfly Valve of 80 mm Bore complete all as specified and directed. Make: HM//L&T/kirloskar as approved.

Manual Rescue and Operation Resque of electric driven pump set along with electrical panel board and chloronome plant including their periodical maintenance and repairs with all consumables and spare parts (excluding major Accessory / items / jobs which shall be measured and paid separately as supplied only under concerned items controlling the valves of distribution lines for distribution water in the area with one operator in a shift of 8 hrs for 24 Hrs in 3 (Three) shift for the following type/capacity of pumping set :- (a) Operation of two pump set mono block out of four pump set : 10 HP - 02 Nos & 7.5 HP-02 Nos, - KV Pump house (b) Operation of one pump set mono block out of two pump set as required : 10 HP - 02 Nos : NSB Well pump house. (c) Operation of one pump set mono block out of two pump set as required : 5 HP pump Set -02 Nos & DG Set 10 KVA -1 No: Location :Nausena baug, KV School, KV staff qtrs sea Hawk Bldg and MAP bldg,50 Alpha area at INS Hamla)

Manual Rescue and Operation Resque of electric driven pump set along with electric panel board and their periodical maintenance & repairs (excluding major Accessory / items / jobs which shall be measured and paid separately as supplied only under concerned items including controlling the valves of distribution lines for distributing the water in the area with one operator in a shift of 8 hrs for the following type/capacity of pumping set for 16 Hrs in 2 (Two) shift for the following type/capacity of pumping set :- (i) Pumping set monoblock 10 HP - 04 Nos (Main Pump House) (ii) Pumping set monoblock 10 HP - 01 Nos,7.5 HP -01 Nos (A Zone well Pump House) (iii) Pumping set monoblock 10 H.P-01 Ns 5.0 HP - 01 Nos (Sea Eagle - I Pump House) (iv) Pumping set monoblock 10 HP - 02 Nos (C Zone well Pump House)

Supply Only Altoc GP Grannule based Chlorine

Testing of water Supply and obtain the following the research and tested through NABL accredited Lab including submitting of test certificate to Engineer – in Charge complete all as specified. Details of tests to be carried out (i) Turbidity (NTU), (ii) PH, (iii) Total Hardness CaCO3 (mg/l), (iv) Sulphate (SO4) (mg/l), (v) Iron (Fe) (mg/l), (vi) Magnesium (Mg) (mg/l), (vii) E-coli or thermo tolerant coliform bacteria Note: The contractor shall collect sample of water in four different locations from FSB Erangal & INS Hamla area and the test to be carried out in the every quarterly of the contract.

Attendiing day to day complaints arises on water supply installation, swimming pool and also attened internal Electric breakdown such as light, Fan, Switch socket points etc. at INS Hamla area and NSB area by employing one Electrician in a Shifts for 08 hrs for comprising replaceing of switches, sockets, Light fittings, starter, choke, Lamp holder, damaged wiring, ceiling fan, MCB, MCCB, etc. for making serviceable complete all as required at site or as directed by Engr-in-Charge Note the items for the replacement shall be provided by department.

Repair of Storage Electric Geysers( 25/50 Ltrs storage capacity ) on the basis of complaints by disconnecting of electric connection and water supply connection,and refixing after repair and rectification of defects of geyser i.e to replace burnt wires to change indicator lamp, top plug nuts/bolts/gaskets/safety release valve/anchor fastners etc and making the Geyser ready for re-use Any small items including above such as are deemed to be included in the rate quoted for this item. Note: - The inner shell, outer cover, thermostat switch, Geyser assembly. Geyser elements, bottom cover ,SS Pipe set(02Nos) of hot and cold water supply if replaced shall be measured and paid separately as supplied including under item concerned completeall as specified and as directed.

Supply only Water heating element upto 3 KW in round / angular etc of any shape fitted in existing geyser25/50 ltrs capacity complete. Make : Havells/Racold/Baja Note:-Quoted rate shall be included cost of taking down of water heater (geyser) and refixing the same.

Supply only Thermostate asssembly manually adjustment type setting range with 35 to 100 CC for fixing upto 50 Ltrs capacity. Make : Havells/Racold/Baja Note:-Quoted rate shall be included cost of taking down of water heater (geyser) and refixing the same.

Supply only Temperature auto cut with indication lamps unit Make - as per sample Note:-Quoted rate shall be included cost of taking down of water heater (geyser) and refixing the same.

Supply only Hot and Cold water stainless steel connecting pipe 2ft long with Connecting bolt 15mm dia ISI Marked complete all as specified & directed.

Manual Rescue and Operation Resque of the following items in Three shifts per day (each shift 08 hrs continuous duration, operated by one operator in each shift including periodical maintenance/repairs (daily check and cleaning, monthly, quarterly, half yearly maintenance) with all consumables parts (except for major assembly/items/jobs which shall be measured and paid separately under item concerned as supplied only) of Central AC plant . (a) Central AC plant of capacity 3 x 26 TR Capacity (One unit stand by) comprising of compressors, motor, condensers, Chillers, AHU, refrigerant, piping, controls, pumps, water supply pipes and controls cooling towers, eletrical panels, instruments starters, strip heaters and repairs/replacement of control cabling/wiring including for the smooth and effiecient of AC plant to achieve desired inside conditions through out the given period. (Location EDP School INS Hamla)

Comprehensive maintenance of Central AC Plant of capacity 11TR X 3 Nos. chiller Type (Blue Star Make) and repairs including replacement of minor defective parts costing upto Rs. 1500.00 comprising of following equipment complete all as specified and directed by Engineer-in-Charge (a) Compressor model Nos :- Make:- Copeland Scroll (16K6005ET) (b) Compressor motor 3HP-02Nos. (c) Condenser water pump set mono block 3HP-02Nos. (d) Air handling unit with blower motor -01No. (e) FRP Cooling tower with CT Fan- 01No. (f) Electrical control panel cubical type floor mounted complete with main switch, MCCBs, MCB's, voltmeter, Ammeter, auto matic star delta starter for compressors, pumps, CT fans, condenser etc. complete-01 Set. (g) Control devices such as expansion valve, thermostat solenoid valves, HP/ LP/ OP cut outs with panel board installed gauges-01Set (h) Digit type thermometer-01Set (i) Air supply duct with grill diffusers, dampers and pre heater & re heater back of each complete-01Set (j) Condenser MS piping 50/40mm dia with valves, pressure gauge, temperature gauge, complete-01Set.

M & L rewinding of unserviceable electric motor 5 Hp, 3 phase 50 Hz 415volt of following capacity pump set complete comprising as under :- (i) Disconnecting & removing the electric motor from installed position including, loading, unloading and transporting to approved workshop. (ii) Taking out the existing burnt winding from the motor including rewinding complete with super enameled copper winding wire of existing gauge including all insulating material such as insulation paper, sleeves, tape, varnish etc. complete for class 'F' insulation. (iii) Transporting the motor back to the location, reinstalling in original position including alignment, electrical & water connection, commissioning and testing for 8hours continously to check the RPM etc. to the satisfactory performance etc. complete.

Material and labour for HVE-11 expansion valve of AC plant capacity 11TR including taking down unserviceable valve complete all as specified and directed by Engineer-in-Charge at Doom hall. Make : Sporlon or equivalent

Pumping down the plant to preserve the existing in refrigerant gas & leak testing of plant by charging of nitrogen gas in to entire plant & monitoring for 24hrs to find the leakages, rectification of leak by brazing & replacement of necessary gasket packing wherever required including copper tubes of suitable size vacumising of the plant by vacum pump & keeping 24hrs for pressure testing including rectification of leakages if any finally recharging of existing refrigerant gas to the plant and topping up of refrigerant if required to maintain the standard pressure complete testing of the plant for smooth functioning complete all as specified & as directed by Engineer-in-Charge. Note : Any Extra Refrigerant gas required will be measured and paid seperatily.

Material and labour for disconnecting condenser for descaling, plugging them & providing of 15mm tee out let for local circulation of mild acid solution in the condenser (separate container and small pump set to circulate diluted acid solution to be used) PH value of solution to be circulated & to be kept 4 and checking frequently i.e. every one hour during the operation Scalgun WS solution to be used for descaling purpose after 2 to 3 hours of cleaning if ph value remains less than flush with fresh water mixed with sodium carbonate tubes and cleaning with nylonbrush after closing the end covers, circulating diluted acid solution as specified above, to maintain PH value as above & flushing the same with fresh water including recharging of stored refrigerant up to required pressure of capacity 2x11 TR Working 22 TR (11 TR Stand by) plant complete all as specified & directed by Engineer-in-Charge.

Supply and charge refrigerant 410A/R32 Gas ISI marked.

Taking down old unserviceable pre filter and supply and fix new pre filters efficiency 90% down to particular size of 10 micron double knitted twisted polymer fabric (washable) rated with press drop of 6 mm WC, including aluminium anodized frame work of 16 SWG to be mounted in filter assembly for Suitable size complete all as specified and directed. Make:DYNA/ASPAWYMAN/MHP as approved

Replacement of unserviceable 2KW Heater strip for AC plant complete all as specified and directed.

Removing the unserviceable solenoid valve 5/8" flare from the liquid line and supply and fix new solenoid valve 5/8" suitable for AC plant of various capacities complete with all as specified and as directed by Engineer-in-Charge

Removing the unserviceable water pressure gauges from water line & supplying and fixing new water meter up to pressure 7Kg. / square centimeter complete with necessary accessories all as specified & directed by Engineer-in-Charge

Material and labour for scraping cleaning & preparation of external surface & painting complete installation of 11 x 2 TR (22TR capacity) including compressor, motor, piping, cooling tower, condensor, AHU & panel board etc with two coats of synthetic enamel paint over a coat of primer as per direction on colour code as given including writing SM & MES numbers complete all as per specified & as directed by Engineer-in-Charge

Replacement of old unserviceable thermostat with new thermostat suitable(-)18 deg C to (-) 23deg C cold storage plant complete all as specified and directed.

Replacement of old unserviceable liquid line filter with new liquid line filter complete all as specified and directed. Make: Danfoss or equivalent as approved by GE.

Supply and fix single phase preventor For 3 phase Motors Upto 10.0 HP Capacity complete all as specified and directed. Make: Minilec or equivalent as approved by GE.

Material and labour for replacement of un serviceable power contactor for starter of water pump including all electrical connection of the following type complete all as specified and as directed Note : Power contactor type ML 1.5 suitable for 5.0/7.5/ 10 HP pump set starter. Make L&T / Siemens

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