COMPREHENSIVE MAINT OF CENTRAL AC PLANT OF CAPACITY 250 TR INSTALLED AT SIMULATOR COMPLEX (DHRUV BLDG) AT ND SCHOOL, NB(K)

Amount

Comprehensive maintenance and routine check up of the chiller unit of capacity (2 x 130 TR and 1 x 90 TR) water cooled chilling unit installed at Simulator Complex (Dhruv Bldg) at ND School on monthly basis, comprising of the following (HIgher Side of AC plant) Mkae : Blue Star of Model No CHFL-Y24 :- Hermetic rotary screw compressor using R- 134 A refrigerent, flooded type shell and tube evaporator shell and tube condenser, microprocessor based control panel ,star delta/part winding starter with control microprocessor to maintain inside temp 23 ± 2 Deg C including all maint routine checkups as recommended by OEM and breakdown attending maintenance as and when required as intimated by EIC at site with complete spares through OEM/authorised service dealer of OEM for the complete machineries/equipments/accessories etc for smooth functioning of AC plant. Preventive Maintenace scope of work:- i) To visit & check the operating parameters of the chillers every quarter / month as per OEM schedules. ii) To review the previous months operating log records and alarm history. iii) To inspect the unit for any unusual vibration, noise etc. iv) To check for a sign of refrigerant leakage and rectifying the same. v) To check the operation of the expansion valves, once a year. vi) To check / calibrate the flow switch for proper functioning. vii) To check the antifreeze and carrying out the setting of the same. viii) To check the LP / HP cut out switches and to replace the same, if found defective. ix) All the breakdowns including the compressor failure, if any shall be attended and rectified. x) To clean the electrical panel of the chiller every quarter with air blower xi) Rewinding of the compressor motor, if required. xii) Repairing of the leakages except pertaining to the heat exchangers. xiii) To attend to the complaints as and when called for. xiv) To provide any spare covered under the scope of AC plants

A. ANNUAL MAINTENANCE OF CHILLER CONDENSER TUBE( Once in contract period) (i) Cleaning of shell and tube condenser and chiller capacity (2 x 130 TR and 1 x 90 TR) by chemical and mechanical process using brush after opening with sides of condensers and chillers brushing and reconnecting with suitable size of packing /gasket in same position including leak testing as per requirements and quoted rate included refixing of removed thermal insulation with new nitrile rubber / Gasket sheet complete all as specified and as directed.

B. ANNUAL SHUTDOWN INSPECTION (Once in Contract Period) 1. To replace internal oil filters, as & when required during the contract period. 2. To replace refrigerant driers, as & when required during the contract period. 3. To inspect the oil quality by color and replace/top up as per requirement. 4. To operate the machines for 08 hours (Maximum) and adjust the controls for the optimum operation.

Note :- (a) The comprehensive maintenance and complete allied works shall be done through OEM agency i.e Blue Star/authorised dealers. Comprehensive maintenance contract shall be done for the complete Higher side Machineries of the AC Plant. (b) The above comprehensive AMC certificate shall be provided by the contractor in favour of GE(NS) before commencement of work, after acceptance of CA (c) The higher side of AC plant defects shall be get checked by OEM (Blue Star) and made serviceable in case of any defects observed during the routine check up or on call during emergency breakdown including replacement of all minor spares ,Leak detection ,pressure testing with nitrogen ,vacuumising,Labour for compressor oil charging, and testing if required complete all as specified and directed. (d) The quoted rate including repalcement/repair of any kind of spares labour cost for replacement of defective spares which are excluded by OEM on Comprehensive AMC .The quantity of materials may vary and excecuted at site only on required basis. (e) Any complaints shall be attended within 24 Hrs the same day of complaint lodged by MES authority or user (ND School) (f) Consumable items which are excluded in AMC by OEM like (refrigerent,filters/driers,compressor oil etc) are measure and paid under relevent items as supply only. (g) The contractor has to submit no dues certificate from the OEM before completion of work.

Supply only Refrigerant Gas R 134 A in sealed cylinder,all as specified and as directed .

Supply only Nitrogen gas in sealed cylinder comprising of 12 PSI gas 6 cum in all as specified and directed.

Supply only Internal oil filter as per existing at site complete all as specified and directed

Supply only External oil filter as per existing at site complete all as specified and directed

Supply only Filter drier core as per existing at site complete all as specified and directed

Supply only Compressor Oil suitable for R-134 A refrigerent based Model CHFL-Y24 screw chiller all as specified and as directed .

Supply only Chilled water thermister sensor with controlling cable as suitable for existing chiller socket/groove for existing chiller units complete all as specified and as directed.

Supply only temperature sensor with cable complete all as specified and as directed

Taking down old unserviceable canvas form AHUs duct to pleneum/Main supply air duct including dismantle of air dampers/fire dampers and supply only new premium quality leather type canvas locking rivits and sealing of silicon material of any size as per existing at site complete al as specified and directed.

Supply only in repairs poly F plus PB classical V- Belts suitable for existing AHU motor sizes (any type of any Series) all as specified and directed.Make : Fenner/Dunlopp

Comprehensive maintenance and routine check up of following Lower side AC equipments components on monthly basis/as per requirement to ensure the working of all machineries without breakdown of AC supply to the complex with all materials and labour for smooth functioning of plants :-

Cooling Tower of capacity 150 TR - 02 Nos and 90 TR - 01 No complete with all accessories, basin, fittings, cooling tower fan motors - 03 Nos etc (5 HP -02 Nos & 3 HP - 01No) complete all as specified and as directed.

MONTHLY PREVENTIVE WORKS FOR COOLING TOWER a) Checking & make it Functioning of Cooling Tower starter panel. b) Checking & make it Functioning and tighten cable connection. c) Checking and cleaning of contractors. d) Checking and cleaning of CT fan terminals. e) Checking & make it Functioning and lubricate CT fan motor bearing. f) Checking & make it Functioning motor Amps. g) Checking & make it Functioning and washing tower tray and strainer. h) Labour for replacement of fills. i) Checking of fan blades and alignment of sprinkler pipes. j) Checking of Vibration of structure etc. k) The replacement cost for any kind of material and labour including repair/replacement of cooling tower hub, blade, stay assembly, bearings and motor winding etc shall be deemed to be included in the quoted rate. l) Any breakdown shall be attended within 24 hrs. A penalty of Rs 1000/- per day will be deducted on failuring to attend the complaint within 24 hrs.

Air Handling Units of following capacity :- 10 Nos (Including replacement of defective electrical accessories of AHU, CT, Pump panel' ) (capacity of AHUs as follows) including 10 Nos of electric motors, blower of different cpacities, blower units, cooling coils, valves of differnet sizes, gauges etc including repairs/rewinding of electric motors:- (i) 18500 CFM - 2 Nos (ii) 16500 CFM - 1 No (iii) 17500 CFM - 1 No (iv) 22500 CFM - 1 No (v) 23500 CFM - 1 No (vi) 29200 CFM - 1 No (vii) 28200 CFM - 1 No (viii) 12500 CFM - 1 No (ix) 14500 CFM - 1 No

MONTHLY PREVENTIVE WORKS FOR AHU a) Repair the components of the AHU equipment at site / Service Station. b) Checking all electrical controls and components of AHUs. c) Checking and servicing of AHU electrical Panel. d) Lubricating the bearings of AHU motor. e) Adjustment of tension and replacing of AHU blower motor belt if worn out. f) Checking and lubricate of AHU blower bearings. g) Checking & make it Functioning of blower shaft. h) Checking and cleaning of AHU blower. i) Checking & replace with new if found tear/breakng of AHU canvas connection. j) Checking of AHU blower pulley and motor pulley. k) Checking and cleaning of AHU motor terminals. l) Checking of AHU motor amps. m) Checking of AHU room temperature (return air). n) Checking of room temperature (supply air) q) Checking of thermostat. r) Checking & make it Functioning of humidistat. s) Checking of AHU heater t) Checking and cleaning of AHU drain and try u) Checking and washing of AHU coil with water pressure. v) Checking of CFM, dampers,fuses, motor vibration levels. w) Checking of Air leakage x) The replacement cost for any kind of spares of motor/pulleys, material and labour including bearing, pulley, motor winding shall be deemed to be included in the quoted rate. y) Any breakdown shall be attended within 24 hrs. A penalty of Rs 1000/- per day will be deducted on failuring to attend the complaint within 24 hrs. z) Monthly water services of AHU filters- 10 AHUs

AISWARYA ENTERPRISES