Military Engineer Services Tender

(i) Three Nos hermetically sealed Scroll / reciprocating type compressor using R407C refrigerant with motor of matching capacity, electrically operated on three phase 415 volts, 50 Hz AC supply complete with suction and discharge shut of valves, automatic capacity control with thermostats and solenoid valves, built in suction strainer, oil pump, hot gas muffler,crank case heater, oil pressure safety switch etc all as specified:-

(ii) Three Nos guage panel complete with HP/LP cut outs, oil safety switch, suction, discharge and oil pressure guage.

iii) 3 Nos of shell and tube type water cooled condensor MS shell and integrally finned copper tubes complete with safety valves, drain valves, water inlets, outlets valves, hot gas inlet and liquid outlets, isolating valves, thermometer and pressure gauge at water inlet /outlet and purge valve complete all as specified.

iv) 3 Nos of shell and tube chiller with thermal insulation, temp of water entering the chiller 12°C and water leaving the chiller 7°C including refrigerant inlet and outlet connections with isolating valves, expansion valves, water inlets and temp and pressure gauges at water inlet and outlets drain and vent, stop valves complete all as specified.

v) 3 Nos.of stand fabricated out MS channel/angle iron of suitable size for mounting of compressor, motor chiller and condensor units.

vi) Three sets of spring antivibration serrated pads and suitable foundation as per manufacturer's instructions for installation of the units

vii) First charge of non CFC refrigerant (R407C) and oil for the complete plant.

(b) Condenser water cooling arrangement comprising of the following :-

i) 2 Nos of monoblock centrifugal pumping set each of 5HP suitable for circulating chilled water along with necessary valve in suction and delievery line each of 100% capacity (one working and one standby) and suitable for operation on 3 phase 50 Hz 415 Volts AC supply with pressure guage in each pump set including suitable foundation with neoprene rubber anti vibration ribbed pads complete all as specified.

(ii) 1 No.Twin cell induced draft ms 'C' class type cooling tower of capacity 65 TR with suitable foundation and float valve of suitable size and make up PVC water tank of 2000 Ltrs capacity mounted on suitable staging as specified.

iii) 1 lot of condenser water piping as per -1239 from makeup water tank to cooling tower and from cooling tower to condensers and return complete with necessary fittings valves, pots, strainers etc complete all as specified. Necessary copper piping for liquid line complete with fittings valves etc.

(c) Chilled water circulation arrengement comprising of the following:-

i) 2 Nos of monoblock centrifugal pumping set each of 5HP suitable for circulating chilled water along with necessary valve in suction and delievery line each of 100% capacity (one working and one standby) and suitable for operation on 3 phase 50 Hz 415 Volts AC supply with pressure guage in each pump set including suitable foundation with neoprene rubber anti vibration ribbed pads complete all as specified.

ii) 1 lot of chilled water piping MS "C" class confirming to IS-3589 of suitable size with bends, reducers, tees, supporters, flow indicators, etc including insulations complete all as specified and as per drawing.

iii) 1 lot of condensate water drain piping with GI class "B" confirming to IS-1239 of suitable size including all fittings like anchor fasteners couplings, bends, elbows, tees,thrust blocks, wodden blocks, flages, welding as required including insulations complete all as per drawing and as specified.

iv) 1 No. of thermally insulated chilled water make up PVC tank of suitable capacity

(d) Air handling unit

(i) 01 No air handlig unit of 26000CFM capacity with chiller unit of sectionalized construction, factory made, double skinned with 6 row deep colling coil and 50 mm TSP with all accessoreis, control etc including necessary material and labout for raised platform of suitable size as per OEM specifications complete and comparising of the following :

ii) Cooling coils of copper tube with aluminium fins

iii) Pre Filters, having Elfecinecy of 90% efficency 10 Microns.

iv) Provn for heating strip type,8x3 KW arranged in banks to serve as reheater complete with controls for monsoon and provision of humidification.

v) Blower for weather makers complete with suitable electric motor, TEFC squirrel cage induction motors Siemens/ Crompton Greaves/Kirloskar/GEC for operation on 415 V,3 phase, AC supply, with V belt and belt guard.

vi) 3 way motorised value of suitable size.

(vii) Insulation of AHU cabinet all as specified by OEM

e) Control panel, floor mounted factory made cubical type vertically enclosed made out of 3.15 mm thick MS sheet with hinged doors and locking arrangements, powder coated suitable for operation on 3 phase, 50 cycles per second, 415 Volts, with one set of copper bus bars of suitable numbers provided with MCCB and out doing feeders of suitable numbers provided with MCCBs Make :- L&T/CG/Schneider includig provision of Voltmeter 0-500 V and Ammeters for each circuit with CTs and selector swithces, KWH meter 3 phase with, indicating lamps, suitable star/delta starters for compressors, condensor pump, blower, chilled water pump with necessary liner locking arrangements. Necessary cable glands shall be provided. Control circuits and switches which are not included but considered essential for the efficient performance of the plant/equipment shall be provided.All control cable will be PVC insulated armoured copper conductors only.

f) One lot of air distribution system from AHU to the space to be air conditioned and provision of return air plenum as pr IS-655 comprising of class VIII galavanised sheet with suitable supporting arrangments and bracing. Supply / return / fresh air grills duly painted / fineshed to match with the eixisting ceilling. fire damper fusible link operated.

g) Temp and relative humidity measuring sensor probes shall be of make- Honeywell/forbes marshall/sub zero/johnson controls. The LCD display panel with control wiring and selector switch shall be installed in AC plant room

NOTE: 1. Provision for interlocking wiring between compressor motor, condensor pump, AHU, cooling tower thermostat and solenoid switches shall be made. The cables between control panel and machine terminal box shall be of PVC insulated copper cable of adequate current carrying capacity.

(2) Phase I & II Tests as specified and as directed by Engr-in-charge.

(3) Any other connected work not mentioned above but considered necessary by the tenderer for succesful installation, commissiong and operation and effecient performance of the plant.

(4) Masonry work connected with the installation of plant, excavation for laying of pipe line, foundation for cooling tower and other equipment, cutting holes and making good the same etc

Galvalume wall shall be insulated with 1st layer of closed cell class 'o' Nitrile Rubber insulation of density 40-55 kg/m3 having thermal conductivity of 0.037 w/mk at 20 deg C mean temp and water vapour diffusion resistance 7000 with 19mm thickness and 2nd layer with 19mm thick closed cell class 'o' Nitrile Rubber insulation as above with alminium foil of minimum 60 micron thickness. The insulation should be used with a duct seal adhesive

Manning and operation of chilled water type central AC plants installed against BOQ 1.01 to 1.33 for a period of 60 months after satisfactory completion of Phase-I test of central AC plant in three shifts each 08 Hrs duration i.e. 0600 Hrs to 1400 Hrs, 1400 Hrs to 2200 Hrs and 2200 Hrs to 0600 Hrs round the clock for all days including Sunday & Holidays etc. all as specified and directed by GE & Engineer-in-Charge.

(a) 11 Months after completion of Phase-I test

(b) 11 Months after completion of 3.01 (a) above.

(c) 11 Months after completion of 3.02 (b) above.

(d) 11 Months after completion of work 3.03 (c) above.

(e) 11 Months after completion of 3.04 (d) above.

(f) 05 Months after completion of 3.05 (d) above.

Comprehensive maintenance comprising of routine, preventive & breakdown maintenance of chilled water type central air conditioning plant installed under BOQ item No. 1.01 to 1.33 here in before comprising of all devices and accessories through out 12 months on all days including Sunday & Holidays for a period of 04 years after expiry of defects liability period (i.e. 12 months after completion of all Phase II tests) all as specified and directed and as shown below:-

(a) First year (12 months after expiry of defects liability period)

(b) Second year (12 months after completion of 4.01 (a) above.)

(c) Third year (12 months after completion of 4.02 (b) above.)

(d) Fourth year (12 months after completion of 4.03 (c) above.)

NOTES FOR ITEM NOS: 1.01 to 1.33 and 4.01 to 4.04 (a) Rates quoted under Col.6 for Serial Nos.1.01 to 1.33 and 4.01 to 4.04 shall be for manning and operation, comprising of materials and labour complete unless mentioned otherwise. (b) The comprehensive maintenance shall be for a period of 48 months wef satisfactory completion of defects liability period for the equipments installed under Item No. 1.01 and manning & operation shall be for a period of 60 months including the defect liability period. (c) The contractor shall be responsible for periodical maintenance, as per maintenance schedule attached and specified including renewal / replacement of parts, fittings / fixtures filling of refrigerant gas etc required for smooth functioning of the plant as per manufacturer’s instructions (d) Maintenance of log sheet and all maintenance record shall be responsibility of contractor and no stationary shall be provided by Department. Format of log sheet and maintenance records etc shall be decided by GE/ Engineer-in-Charge. (e) The contractor shall ensured the neat and cleanliness of all equipments installed within the premises and surrounding of AC plant room, cooling tower, water tanks, ducting, AHU rooms etc.

(f) The work covered under this schedule will be ordered on the contractor by the GE every year through a separate work order at the rate quoted by the contractor.

(g) Manning and operation of central AC plant shall be carried out round the clock in three shifts each 08 Hrs through the ITI in Ref. and Mech. qualified tradesman. (h) During the defect liability period, the payment of manning and operation of AC plant shall be made and comprehensive maintenance part shall be covered into the quoted rate of central AC plant (Installation work) being within the defect liability period. The contractor shall keep the personnel on installation with such qualification who can operate the central AC plant as well as carryout the preventive / routine / breakdown maintenance. The quoted rates shall deemed to be included all above mentioned factors under Serial item Nos: 4.01 to 4.04.