PREVENTIVE ROUTINE MAINT OF SCREW CHILLER 3 X 285 TR CAPACITY AC PLANT INSTALLED IN INHS SANJIVANI HOSPITAL AND 350 TR AT DHRUV BLOCK AT ND SCHOOL

Comprehensive maintenance and routine check up of the chiller unit, Model No 30HXC285A of capacity (2x 285 TR Working + 1 x 285 TR standby) water cooled Chilling unit installed at INHS SANJIVANI on monthly basis, comprising of the following(Higher side of AC plant) Make: Carrier screw chiller of model 30HXC285A 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 and RH 55 ± 5 %. 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 the proper functioning of microprocessor and take control test. vii) To check / calibrate the flow switch for proper functioning. viii) To check the antifreeze and carrying out the setting of the same. ix) To check the LP / HP cut out switches and to replace the same, if found defective. x) All the breakdowns including the compressor failure, if any shall be attended and rectified. xi) To clean the electrical panel of the chiller every quarter with air blower xii) Rewinding of the compressor motor, if required. xiii) Repairing of the leakages including charging of gas/oil topup xiv) To attend to the complaints as and when called for. xv) 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 3 x 285 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.

Horizontal back pull type end suction chilled water pump 50 HP with TEFC motor, bronze -impeller (2 Working & 1 Standby) complete all as specified and as directed.

Horizontal back pull type end suction condenser water pump 75 HP with TEFC motor, bronze -impeller (2 Working & 1 Standby) complete all as specified and as directed.

MONTHLY PREVENTIVE WORKS FOR CONDENSER PUMPS AND CHILLED WATER PUMPS a) Checking & make it Functioning and cleaning of pump starter panels. b) Checking and tighten cables. c) Checking & make it functioning. d) Checking and cleaning of terminals. e) Checking & make it Functioning of coupling of pump and motor. f) Checking of spider bush of pump. g) Checking of water seal of pump. h) Checking of motor amps. i) Checking and lubricate of motor bearing. j) Checking and cleaning of inlet strainers of pump k) Checking alignment of motor and pump l) Repairs/Replacement of motor winding if found wornout. m) Supply and fixing of any motor/pump spares required and proper functioning of chillers. n) Repair/Replacement of drain pipe of pumps to arrest the leak. o) The replacement cost for any kind of material and labour including bearing, motor winding shall be deemed to be included in the quoted rate. p) 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.

Induced Draft type 300 TR, Cooling tower of FRP ( 2 Nos working and 01 No standby) complete with all accessories, basin, fittings, 10 HP fan motor etc complete all as specified and as directed.

MONTHLY PREVENTIVE WORKS FOR COOLING TOWER a) Checking & make it Functioning of 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 :- 18 Nos (Including replacement of defective electrical accessories of AHU,CT,Pump panel'-26 Nos) (capacity of AHUs as follows) including 18 Nos of electric motors, blower of different cpacities, blower units, cooling coils, valves of differnet sizes, gauges etc:- (i) 22000 CFM with 10HP Motor - 1 No (ii) 20000 CFM with 10 HP Motor - 1 No (iii) 14000 CFM with 7.5 HP Motor - 1 No. (iv) 11600 CFM with 7.5 HP Motor- 2 Nos (v) 6200 CFM with 3 HP Motor - 1 No. (vi) 14350 CFM with 7.5 HP Motor - 1 No. (vii) 8400 CFM with 5 HP Motor - 1 No. (viii) 16800 CFM with 10 HP Motor - 1 No. (ix) 3500 CFM with 2 HP Motor- 1 No. (x) 13600 CFM with 7.5 HP Motor- 1 No. (xi) 3850 CFM with 2 HP Motor - 1 No. (xii) 4900 CFM with 3 HP Motor - 1 No. (xiii) 7200 CFM with 5 HP Motor - 2 Nos (xiv) 6000 CFM with 3 HP Motor - 1 Nos (xv) 8000 CFM with 5 HP Motor - 2 Nos

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) Return air vents of AHU to be covered with SS wiremesh of suitable size to avoid rodent entry