Military Engineer Services Tender

Taking down central air conditioning plant of 2x30 TR including AHU's water pump sets, cooling towers, ducting and electrical connections with stand by 30 TR, including transporting to AGE E/M store yard and taking receipt voucher duly authenticated complete all as specified and directed.

Taking down central air conditioning plant of 2x70 TR including AHU's water pump sets, cooling towers, ducting and electrical connections with stand by 70 TR, including transporting to AGE E/M store yard and taking receipt voucher duly authenticated complete all as specified and directed.

Design, Supply, installation, testing and commissioning of latest technology based water cooled chillier type central AC plant complete with all equipments and accessories of nominal capacity of each AC of the following types (Two nos working and one no as stand by) including all accessories for AC plant complete all as specified and directed :- Notes :- (i) Complete design of chilled water plant along with necessary calculations duly depicting the components mentioned at particular specifications shall be submitted by the contractor for approval of the Accepting Officer. (ii) A single line Diagram will also be submitted along with design for approval of the Accepting Officer duly vetted by IIT /NIT/ any Govt University. (iii) The quoted rate is deemed to include the above provisions.

2x20 TR Metrology Bldg (Working) - 02 Nos

1x20 TR Metrology Bldg (Standby) - 01 No.

2x40 TR Magzine Bldg (Working) -02 Nos

1x40 TR Magzine Bldg (Standby) -01 No.

2x35 TR 3DCNC Bldg (Working)- 02 Nos

1x35 TR 3DCNC Bldg (Standby)- 01 No.

2x30 TR AID/AIC Bldg (Working)-02 Nos

1x30 TR AID/AIC Bldg (Standby)-01 No.

2x70 TR Knowledge Center Bldg (Working)-02 Nos

1x70 TR Knowledge Center Bldg (Standby)-01 No.

DESIGN PARAMETERS FOR SL ITEM NO 6.01 TO 6.10 (A) CHILLER UNIT : Micro processor controlled, factory assembled and factory tested water cooled chillier unit comprising of semi hermetic screw compressor (fighter single compressor or multiple compressor with independent refrigerant circuit) using R-134a Refrigerant driven by induction motor 3 ph 415 V suitable for min for above capacities refrigeration capacity, water cooled condenser and flooded cooler with electronic expansion valve complete with inbuilt, control panel having compressor based control for operation of compressor, condenser, chillier having features of auto operation, min run time equalization, auto restart after power failure, built in time delay, fault diagnostic etc, complete with suitable capacity contactors duly pre wired and inter connected-03 Nos. (B) CONDENSER WATER CIRCULATION SYSTEM : Comprising of the following : (i) FRP induced draft cooling tower two in Nos of 50% capacity of above working plant capacity, complete installed on suitable RCC staging including PCC flooring in around the staiging with spray section, honey comb fill basin, fan, TEFC motor, intake bird screen and other accessories (as per manufacturers technical specification)-02 Nos (Both will be working same time).

(ii) PVC/HDPE make up water tank 2 x 5000 ltr capacity installed/placed on PCC/Brick staging/RCC of suitable load carrying capacity platform for makeup water requirement including brass float valve with polyethylene ball, over flow and drain arrangement incoming connection of GI pipe 25mm dia medium grade from tank to tapping point -01 Job. (iii) End suction type 3 phase electric pump set of 100% capacity and discharge as per AC plant capacity and FASD starter for re-circulation along with rubber vibration isolation pads (one number working and one No will act as standby). Necessary pressure gauge on discharge and suction of pump shall be provided at the outlet of each pump -02 Nos (1 No will be standby). (iv) Condenser water piping of GI medium grade (ISI marked), pipe and fittings for interconnecting the cooling tower with condensers and pumps, make up water tank, drain pipe, complete with Y strainer, NRVs and butterfly valves - 01 Job. (v) Non chemical type on line scale preventer of size as per the capacity of the condenser water pump flow -02 Nos.

(C) CHILLED WATER CIRCULATION SYSTEM : Comprising of the following provisions :- (i) End suction type 3 phase electric pumping set of 100% capacity discharge as per the capacity of plant working at 415V AC for recirculation of chilled water with ribbed rubber vibration isolation pads. (One no working and one no will act as standby) necessary pressure gauges on discharge of pump shall be provided at the outlet of each pump - 02 Nos (1 No will be standby). (ii) Chilled water piping with MS heavy grade class 'C' ERW pipe of suitable diameter including all sealable fittings including two coats of synthetic enamel paint over a coat of red oxide primer on both inside and outside as directed, butterfly valve, NRVs for chillier chilled water pumps with AHUs and fan coil units. Chilled water pipe lines shall be insulated with 50 mm thick EPS (Expanded polystyrene) pipe section wire mesh and cladded with aluminium sheet 26 SWG, including water flow switches and electrically operated modulating valve at each AHU -03 Nos. Notes : (i) Thickness of insulation will be 50mm upto pipe size 150 mm dia and 75mm thick of pipe dia is more than 150mm. (ii) Expansion tank shall be of HDPE, white and rectangular type of capacity 2000 litres and necessary piping, control valves on inlets and wash out, float valve complete 01 Job.

(D) AIR TREATMENT SYSTEM : Comprising of the following provisions :- (i) Air Handling Unit (AHU), Double skin construction air handling unit suitable for chilled water system made out of extruded aluminium structural frame/aluminium corner and intermediate connecting pieces and panels of 0.6m, galvanized steel sheet on both sides with 25 mm thick pressure inject PUF (Polyurethane Foam) of density (38+2) Kg/cum) using CFC free R-141b blowing agent the panels have scratch palstisol coating on outer side. (ii) The fan section should mounted on anti vibration spring isolators and free from main structure. The fan should be DIDW (Double inlet Double Width) back ward curved centrifugal fan with air discharge up blast, belt driven with TEFC (Totally enclosed fan cooling) induction motor of suitable capacity. The coiled section consist of 6 row deep coil with min 12 fins/inch duly coated. (iii) The filter section consists of prefilter with 10 micron 90% efficiency. The other accessories are view port, limit switch, stainless steel (SS3) drain pan, Volume control damper for above capacities plant with energy Efficient Motor (EE series) of suitable capacity and specified made and drain pan all as specified -03 Jobs.

(iv) Strip type heater bank of suitable capacity in three banks with necessary copper conductor wiring for banking complete -03 sets (one set for each AHU) (v) Humidistat's and Thermostats in each AHU room. (vi) Three way Mixing valve of required size with actuator and modulating thermostat control for each AHU-03 Nos. (vii) Acoustic insulation with 25mm thick fibre glass rigid boards and finished with RP tissue paper and 28 gauge aluminium perforated sheet up to 5 mt from outlet of the air plenum including air plenum all as specified and directed. (viii) 5 micron filters shall be provided in a GI sheet plenum for AHUs. the filters shall have efficiency of 99% when tested as per BIS 6540-Part-I and made out of Non woven synthetic/polyester/ polypropylene media sandwiched between HDPE mesh on one side for additional coarse filtration and aluminium expanded mesh on the other side for mechanical support. Media is deep pleated, encased and sealed in sturdy GI frame for longer life including rubber gasket of apprx size 600 x 600 x 305 mm.

(E) AIR DISTRIBUTION SYTEM : Comprising of the following provisions :- Supply and return air ducting made out of commercial grade GI sheet zone coating 120 grade IS 277 and fabricated as per IS-655, but not less than 22 SWG thick, ducting wherever passing through unconditioned space shall be insulated with nitrille insulation 13 mm thick with aluminium foil fixed with adhesive tape. 01 Job. (i) GI ducting for supply and return air shall be fabricated as per SMACNA-1995 standards and all as specified. the layout of ducting should be submitted by the contractor for the approval of the Accepting Officer duly considering the ground requirement before executing of the work. (ii) Aluminium anodized double deflection type grills/diffuser complete with MS powder coated volume control damper for supply air grill/diffusers and Aluminium powder coated grills fixed bar type without volume control damper for return air -10 Job. (iii) Aluminium powder coated fresh air grill with MS powder coated volume control damper -01 Job. (iv) Fire dampers automatic type with fusible link (CBRI certificate) and operated with stainless steel spring made out of 16 SWG GI sheet to be provided in main supply duct interlocked with AHU motor to cut off circulation of air in case fire for each AHU. (v) Fresh air damper with GI bowl/fittings and mosquito proof netting shall be provided for each AHU.

(F) ELECTRICAL DISTRUBTUION SYSTEM : Comprising of the following provisions :- (i) Electrical panel board to complete AC plant all connected equipments, cubical type, floor mounted, vermin proofm dust proof CPRI approved, Indoor type, powder coated with seven tank process switch board panel made out of MS sheet not less than 16 SWG powder coated paint suitable for operation of 415 volt of 50 Hz, AC supply, internally wired with copper conductor wire, comprising of the following :- (aa) Air insulated copper bus bar of adequate size for phase and neutral. (ab) One digital electronic energy meter of suitable capacity at main incoming. (ac) Digital type ammeter on every outgoing with necessary CTs and selector switch. (ad) Digital type Voltmeter with necessary selector switch. (ae) Phase indication lamps and running status of all motors, synthetic electrical insulating matting 2.5 mm thick for full length of panel, as per IS-15532 (ii) AHU electrical panel : Separate electrical panel for AHU with suitable incoming and outgoing MCCB/MCBs for AHU motors, Heaters, Pan humidifiers etc, inclusive of starterswith copper control wiring.

(iii) Cabling : Necessary cable connection from main electrical panel to AHU, cooling tower, chilling machines etc, i.e for all the equipment in plant room, outside and AHU motor, with copper conductor of suitable size laid in trenches or overhead on cable trays duly clamped or along side the walls on connection to panel. (iv) Earthing : Provision of earthing with GI plate 600 x 600 x 6 mm and GI strip 32mm x 6 mm all as specified in relevant BIS and as per plate No. 3 of SSR Part- I of required quantity for Chillier unit, Cooling towers, pumps, Motors, electrical panels etc. (G) UNDERDECK INSULATION : AHU rooms shall be provided with under deck insulation to clad. Insulation shall be with 50 mm thick Glass wool of density 24 Kg/m3 fixed with GI angle/clamps. The Glass wool shall be enclosed with 12mm thick gypsum Board and secured with suitable screws all as shown as per drawing enclosed. (H) CIVIL WORKS : Comprising of Masonry foundation for chillier units, pumping sets and AHU and any other equipment and making opening in the brick wall and making good for ducts, pipes, cables and fresh air intake etc, all inclusive.

(i) The unit rate quoted by the tenderes shall be deemed to include for any modifications such as cutting, opening, provision of foundation to plants and equipments as required and making good the disturbed surfaces all as directed by Engr-in-Charge. (ii) All civil works required to install, test and commissioning of the equipment like excavation, foundation for equipment, necessary cable ducts with MS chequered covers 10mm thick duly painted and finishing patch work to match the existing specifications including fixing the ducting etc, shall be deemed to included in the above offer. (iii) All three phase motor shall be provided independent single phasing preventer with phase reversal protection with earthing connection. (iv) Manufacturers Technical support after sales services support shall be provided for chillier package units and other equipment. (v) Suitable supports for holding the ducts and pipes will be provided by the contractor as specified and directed and shall be deemed to be included in the quoted rate.

(vi) Size of earth continuity conductor shall be GI strip of 32x6 mm for all capacity of motors. (vii) All loads up to 63A shall be controlled by MCB and MCCB for loads above 63A. (viii) 3 Core flat copper conductor of suitable size for chillier units, condenser & chiller motors, condenser fans etc, shall deemed to be included in the quoted rate. (ix) Refrigeration control wiring with copper conductor, PVC insulated, unsheathed, multistranded 1100V grade, single core of suitable size drawn in and including PVC conduit of suitable size for interlocking arrangement as per standard practice valve, blower motor, pumps etc, quoted rate is inclusive for this provision. (x) Perforated GI sheet cable tray 100mm width fixed on angle iron supports grouted in wall for carrying all cables. Quoted rate is inclusive for this provision. (xi) Velocity of air in supply air duct shall not exceed 450m/min (1500 RPM) and velocity at diffuser outlet shall not exceed 150m/min (500 RPM) (xii) Necessary drain connection at each AHU room AC plant room shall be provided by the tenderer.

(xiii) Any item of work not included in the above details, but is inescapable, technical requirement for the efficient performance and smooth functioning of the plant shall be clearly specified and brought to the notice of Accepting Officer to modify the same before quoting of tender. (xiv) Phase-II tests of summer, Monsoon and Winter shall be carried out as specified in the particular specifications. (xv) Electricity for Phase-I and Phase-II testing will not be provided by the department. (xvi) COP shall not be less than 5.0. (xvii) The chilled water pump sets shall have minimum flow rate of 2.4 US GPM/TON & 4.0 GPM/TON (xviii) After completion of Phase-I test, the plant shall be regularly run by contractor till completion of all Phase-II tests. Contractor shall deploy adequate qualified technical staff to operate the plant continuously and he shall be liable to carryout all the maintenance required during this period and quoted rate shall be deemed to cater for all the provisions.

(xix) The contractor shall visit the site, prepare and produce the actual heat load calculations to arrive at the actual capacity of the AC plant and connected accessories. (xx) The tenderer need to submit the drawings for chillier unit, AHU, electrical panels etc including all major components for approval of the Accepting Officer before placing the order. The contractor should submit all the supporting calculations as well as OEM recommendations for all the motors, pumps, AHUs, cooling towers, de-humidifier etc to get the desired condition in the specified space. (xxi) The size of earth continuity conductor shall be GI strip of size 32x6mm for all capacity of motors.

Supply, Instalation testing and commissioning of horizontal type Ultrasonic winter heating / Humidifier of capcity 40 TR with Humidistate,the power connection of this humidifier 240 +/- 10%V, 50 Hz, 1-phase in operation and inlet water connection to be provided near this system by other agency as per given below details. Tank made from 1.5mm S.S Sheet (304), welded construction,Top Openable with S.S Bolts & mist output nozzle duly epoxy painted. Level Switch & filter assembly Motorized Valves with timer for auto flashing S.M.P.S, Contactor with MCB, ON / OFF Switch With light, Control Module & Mist Fan complete all as specified and directed.

All as per item No 7, but for 80 TR.

All as per item No 7, here-in-before but for 70 TR.

All as per item No 7, here-in-before but for 60 TR.

All as per item No 7, here-in-before but for 140 TR.