REPLACEMENT OF EM ITEMS AGAINST BER AT GTRE UNDER GE I RND EAST BANGALORE

Supply, installation, testing and commissioning Inverter scroll type water cooled chiller Unit ( Minimum of 24 TR nominal capacity and 20 TR actual Capacity ) 03 Nos.(02 Working + 01 No. Standby) factory designed, pre-fabricated and floor-mounted hermetically sealed Inverter scroll type water cooled chiller machine of at least TR as mentioned in below nominal capacity and complete with scroll compressors having independent refrigerant circuits & automatic stepless capacity control, water-cooled type condenser, horizontal flooded type evaporator with MS shell and seamless copper tubes with elastomeric insulation, suitable numbers of herrmatically sealed Inverter compressor/s, lubrication system as per manufacturer's design required for smooth and trouble-free operation of the chiller package, common base frame, interconnected copper refrigerant piping along with elastomeric

insulation, fittings, valves, expansion valves and accessories to interconnect compressor, condenser, chiller and expansion valve, microprocessor based control panel comprising of controls including sensors and equipped with a keyboard, LCD touchscreen min 7" access input system, protection and monitoring devices to perform control functions, wiring, vibration isolators, gauge panel, automatic safety controls, flow switch at evaporator and condenser and ozone friendly, CFC-free refrigerant R- 410A/R407A all complete as specified and directed by the engineer-in-charge and accessories complete to maintain inside condition as under : to be installed to achieve the inside temperature 22°C+/- 2°C and RH 55 +/- 5% at Engr Service Building GTRE and based on other conditions as given in the User Data sheet and all as required as per the standard code of practice in the given field

Care has been taken to include all items as per below given detail however in case any item of work civi or electrical or mechanical not specifically specified but essentially required for successful and efficient completion and commissioning of air conditioning system shall be procured and fitted in the system to achieve the targeted and optimum performance, the cost of which is deemed included in the quoted tender rates against each item and as a whole of the system. (Engr Service Building GTRE ). Chilled water Leaving Temp. (6.67 °C),Chilled water Entering Temp. (12.2 °C), Evaporator fouling factor = 0.018 m2. °C/kW ,Condenser water Entering Temp. (32.2 °C) .Condenser water Leaving Temp. (36.4 °C),Suitable for Seismic Zone and Altitude as per location/site. Microprocessor based controller.Operational period ' and comprising of the following :-

(i) Restrained Spring Isolators Vibration Isolator Of Approved Make and specifications - Spring elements shall have a lateral stiffness greater than 1.2 times the rated vertical stiffness and shall be designed to provide a minimum of 50% overload capacity. Non-welded spring elements shall be polyester powder coated, and shall have a 1000 hr rating when tested in accordance with ASTM B-117. Springs shall be deflections as per operating load design of equipment. (ii) Single Arch Rubber Bellow for Chillers as per requirement complete with Control Guide Assembly (iii) Initial / first charge of refrigerant gas & compressor - Necessary civil work viz. foundation for placement of chillers, etc. shall be deemed to be included in the scope of work.Notes: The rate quoted by the contractor is deemed to be included the following:- 1. The initial charging of refregerant gas.2. The testing of the plant after installation.3. The scope includes thermo meter, pressure gauges, air vent, civil works, cabling and other work in complete to make the plants totally functional.

Supplying, installing, testing and commissioning of factory built, floor mounted, site assembled double skin Air Handling units (AHUs) 15000 CFM / 500 TR / 36 KW EuroVent/BIS certified.complete with following specifications. (a) Standard 40 mm thick panels consisting of pre plasticized painted sheet casing of thickness 0.8mm outside layer and 0.8 mm inside layer with zinc coating and polyurethane foam (PUF) insulation having density of 40kg/cum factory injected between them by injection moulding machine, view windows, marine Lamp, limit switch, electrically interlocked fan section with hinged access door, fire retardant flexible joints for outlets of the units. Drain connection with stainless steel drain pan duly insulated and necessary vibration isolation arrangement to avoid any vibration etc complete all as specified and directed. (b) The extruded aluminium framework shall be with non-thermal break profiles as required,

(c) Fan section complete with DIDW Centrifugal fan with backward curved impeller selected for an outlet velocity of less than or equal to 8 M/s and Noise level shall be below 65 dB A levels at distance of 1.5 mtr from AHU. (Fan velocity shall not exceed 8.5 m/s) Fan outlet velocity 1600 FPM (Applicable for DIDW Belt driven Fans) (d) TEFC motors (IE3 efficiency) suitable for 415 ± 10% volts, 50 Hz, 3 phase AC supply. (e) Chilled water cooling coil with aluminium blue finned copper tubes (tube thickness not less than 0.5mm), The face velocity across cooling coil shall be limited to 450 FPM max.The scope shall include Supply, Installation, Testing and Commissioning of sutiable size electronic, self balancing Heater to be considered for maintain the humidity of 55 +/- 5%. Heater control should be added in the AHU panel. AHU should have Cooling 6/8 row deep including suitable size PVC drain pipe with 13mm thick insulation to nearest connection and laid on and including perforated /ladder type tray. f) Supply air stream shall have MERV 13 Filter section or equivalent, having pre (EU4, more than 90% efficiency for 10 Microns) and fine (Bag filter EU7 3 Microns).

(g) Unit shall be complete with opposed blade aluminium volume control dampers at Supply, Return & Fresh Air opening in AHU. (h) Control Panel should be with AHU with VFD and bypass option including Heater and UVGI control in the same panel. (j) UVGI lamps( UL certified) - (Each AHU will have combination of 2 feet long UVGI lamps, each lamp shall cover effectively 4sqft of area ) in coil section of AHU. The scope shall include electrical wiring and electrical isolator for following capacities. The purpose of these UVGI lamps emitters is to improve indoor air quality (IAQ) by eliminating mould, bacteria and other contaminants in down stream section. Note: Fresh air changes shall be as per new NABH norms (k) AHU's shall be mounted on P.C.C 1:2:4 type B1 blocks of required size with neoprene pads in between as per manufacturers instructions (Engr Service Building GTRE ).

Design & Supply, installation, testing & commissioning of Not less than 200 USGPM / 60TR FRP construction, Induced Draft, Cross flow Cooling Towers (single / multicell as mentioned below), complete with FRP basin, honeycomb design PVC fill, drift eliminators, hot water distributors, low noise adjustable pitch propeller type fan of FRP & Belt Driven along with casing, coupled with TEFC Squirrel cage induction motor weather-proof with cowl for outdoor installation. Basin shall be provided with accessories like quickfill, makeup & drain pipes, Pvc construction float valve, overflow pipe etc. Motor shall be suitable for 415V ± 10%, 50Hz ± 5%, 3-phase AC supply. Motor shall be suitable for VFD operation i.e. motor suitable for any low voltage & low frequency range due to speed variation through VFD without heating and noise generation

Separate motor shall be provided in each cell in case of multi cell towers. The fan / fan motor shall be isolated from the cooling tower structure . Each tower/ each cell shall be complete with its suitable HDG Steel ladder with safety cage as per specifications. The cooling tower shall be certified for test procedure as per CTI STD-201. Motors shall be TEFC, Squirrel cage induction motors, IP 66, Class F insulation.Motor Effeciency shall be as per ECBC 2017: ECBC: IE2,Cooling Towers Efficiency: As per Table 5.18 of ECBC-2017. Weather conditions of site location (Engr Service Building GTRE) BANGLORE as mentioned  below:

(a) Summer DBT / *Summer WBT: As per Banglore Condition (b) Monsoon DBT /* Monsoon WBT: As per Banglore Condition (c) Wet bulb temp. to be considered for cooling tower sizing: 83°F (d) Cooling Tower Approach: 7°F (e) Condenser water OUT (Leaving Water Temp.) LWT: 89.6°F (Considered WBT + Cooling Tower Approach) (f) Condenser water flow rate: 4 USGPM X TR of Chiller Capacity (j) Cooling tower's capacity should be adequate for total heat rejection, which shall be the total chiller capacity (TR) plus the BHP of chiller motor (IKW of motor) i.e. motor heat. Cooling Tower as described above.