41 -- CENTRIFUGAL WATER CHILLER

Notice Date

January 22, 2001

Contracting Office

NASA/Langley Research Center, Mail Stop 144, Industry Assistance Office, Hampton, VA 23681-0001

ZIP Code

23681-0001

Solicitation Number

1-058-RFS.1404

Response Due

February 22, 2001

Point of Contact

Marie L Smith, Contracting Officer, Phone (757) 864-4122, Fax (757) 864-7709, Email m.l.smith@larc.nasa.gov -- Susan E. McClain, Contracting Officer, Phone (757) 864-8687, Fax (757) 864-8863, Email s.e.mcclain@larc.nasa.gov

E-Mail Address

Marie L Smith (m.l.smith@larc.nasa.gov)

Description

This notice is a combined synopsis/solicitation for commercial items prepared in accordance with the format in FAR Subpart 12.6, as supplemented with additional information included in this notice. This announcement constitutes the only solicitation; quotes are being requested and a written solicitation will not be issued. This procurement is being conducted under the Simplified Acquisition Procedures (SAP) under FAR 13.5 (Test Program for Certain Commercial Items). The Chiller shall conform to the following parameters: Nominal Capacity of 293 Tons at ARI 550/590-98 Cooler Entering Temp 54 F Cooler Leaving Temp: 44 F Cooler water Flow rate: 702 GPM Cooler PD: 13.8 FT wg Condenser Entering Temp: 94.5 F Condenser Leaving Temp: 85 F Condenser water Flow rate: 879 GPM Condenser PD: 11.5 FT w.g Chiller Overall Efficiency: 0.610 KW/Ton Volts: 460 -- 60 hz Motor Rated Amps: 256 Min. Circuit Ampacity: 321 Unit shall include isolation valve package, high efficiency compressor and motor, and hot gas bypass. Unit shall be fully tested in factory and shipped with intent to be dissembled for transport to building mechanical space, reassembled and fully re-tested after system installation. Unit shall include full warranty to include 1 year parts and labor. Full refrigerant charge and oil shall be included. Centrifugal water-chiller assembly shall be packaged and self-contained, and shall include compressor-condenser, cooler (refrigerant evaporator) accessories, control panel, and intercomponent piping and wiring ready for field-terminal connections. Unit shall conform to the applicable requirements of ARI 550, ARI 480, and specified requirements. Operating power for compressor motor, oil pump motor, oil heater, control systems, and other auxiliary equipment and devices shall be derived from a single 480-volt, three-phase, 60-Hertz power source; no auxiliary power sources shall be required. Unit shall utilize refrigerant 123 or 134A. The chiller will be installed by others in the basement area of Building 1293A. It is imperative for the chiller to be disassembled infield, transported through a shaft that is approximately 109 inches by 121 inches and 164 inches in height. The components of the chiller will be lowered into the shaft through an access at the top that is approximately 87 inches by 63 inches. The chiller will require re-assembly in the basement and shall be required to fit in a footprint that is 12 feet long and 6 feet wide. The height of the unit shall be no more than 6 feet 6 inches. The chiller manufacturer's representative shall provide a letter certifying that the physical size of the chiller, disassembled, is capable of being transported to the basement installation site. Chiller nozzle connections shall be grooved couplings. COMPRESSOR Compressor shall be single or multi-staged, direct- or gear-driven centrifugal type, with hermetically sealed, compressor-motor assembly. Motor windings shall be refrigerant- or water-cooled. Rotor shall be statically and dynamically balanced at the factory. Amplitude of internally excited vibration shall not exceed 0.025 millimeter peak-to-peak when measured with a vibrometer at the compressor end of the motor. Shaft main bearings shall be replaceable sleeve-insert type. Compressor shall be provided with temperature-actuated capacity reduction and shall be of the multiple radial blade or butterfly-damper type to provide automatic capacity regulation from 100 percent to 10 percent of capacity. Automatic hot-gas bypass shall be provided to maintain stable operation. Control system shall include automatic stopping, when load falls below 10 percent capacity point, and automatic unloaded restarting on load demand. Capacity modulation shall be controlled by the temperature of the water leaving the cooler. Unit controller shall be able to maintain leaving-water temperature at plus or minus 0.5 degree F of the set point. Compressor shall be provided with a factory-installed lubrication system to deliver oil under pressure to bearings and transmission. CONDENSER Condenser shall be of the shell-and-tube cleanable-type construction. Condenser shall comply with the Boiler and Pressure Vessel Code, Section VIII, Pressure Vessels Division 1-Basic Coverage regarding quality of materials used, methods of construction, design of components, and testing of materials, assemblies, connections, and appurtenances. Minimum water-side working pressure shall be 150 psig, and minimum refrigerant-side working pressure shall be saturation pressure of refrigerant used at 85 degrees F. Spaces not subject to ASME code due to size or other limitations shall be pneumatically tested at 1-1/2 times working pressure or 45 psig, whichever is greater. Tubes shall be seamless copper tubing with integral fins and shall be individually removable from either end of shell. Tubes shall be rolled or brazed into tube sheet. Intermediate tube supports shall be provided so that distance between supports does not exceed approximately 3 feet. Supports shall be fitted to the tubes in a manner that will preclude corrosion, vibration, and abrasion. Unit shall be designed to permit pump-down and isolation of the entire refrigerant charge within 80 percent of available condenser volume. If the unit condenser does not have sufficient pump-down capacity, a separate pump-out tank shall be provided. When R-123 is used, a purge system shall be provided and connected to the main refrigeration system. The purge system shall be manually or automatically started and stopped and be complete with operating and safety devices. Condenser performance shall be based on a maximum water velocity of 10 feet per second (fps) and a fouling factor of 0.00025. Design and construction provisions shall preclude tube failure due to erosion. COOLER (REFRIGERANT EVAPORATOR) Cooler shall conform to the requirements specified herein in paragraph entitled, "Condenser," and the following: Cooler capacity shall be based on refrigerant suction temperature in excess of 32 degrees F and a fouling factor of 0.00025. A safety relief device shall be provided. REFRIGERANT FLOW CONTROL Liquid refrigerant shall be metered from the condenser to the cooler using a float type metering valve to maintain the proper liquid level of refrigerant in the heat exchangers under both full and part load operating conditions. The float valve chamber shall have a bolted access cover. CONTROL AND CONTROL PANELS Water-chilling unit shall be provided with microprocessor control panel containing safety and operating devices and intercomponent piping and wiring for field terminal connection and fully automatic operation. Microprocessor display screen shall be capable of indicating the following information: 1. Date and time of day 2. Primary system status message 3. Secondary status message 4. Chiller operating hours 5. Entering chilled water temperature 6. Leaving chilled water temperature 7. Evaporator refrigerant temperature 8. Entering condenser water temperature 9. Leaving condenser water temperature 10. Condenser refrigerant temperature 11. Oil supply pressure 12. Oil sump temperature 13. Running load in amps 14. Evaporator pressure 15. Condenser pressure 16. Compressor -- discharge temperature 17. Motor winding temperature Unit shall automatically shut down when any of the following conditions occur: 1. Current surge 2. High/low voltage 3. Single-cycle dropout 4. Phase failure 5. Bearing oil high temperature 6. Low evaporator refrigerant temperature 7. High condenser pressure 8. High compressor motor temperature 9. High compressor discharge temperature 10. Low oil pressure 11. Prolonged compressor surge 12. Loss of cooler water flow 13. Loss of condenser water flow 14. Oil pump motor overload 15. Compressor motor overload 16. Excessive compressor motor acceleration time 17. Intermittent power loss 18. Compressor motor starter faults MOTOR Chiller shall have a high efficiency compressor motor. Compressor motor shall be of the hermetic liquid refrigerant cooled squirrel cage induction type suitable for a 460 volt, 60 Hertz power source. Motor design speed shall be 3550 rpm with 60 hertz power. Motor stator shall be arranged for service or removal with only minor compressor disassembly and without removing main refrigerant piping connections. COMPRESSOR MOTOR STARTER A wye-delta starter shall be furnished by the chiller manufacturer. The starter shall be completely pre-wired by the manufacturer. Field wiring shall be limited to connections to main power feeder; remote-start, water flow switch, and other safety circuits; and control circuits of water pumps and cooling tower fans. The starter shall be UL and CSA approved and shall include: 1. Unit-mounted NEMA Type 1 enclosure with integral fan cooling and locking hinged doors. 2. Main power disconnecting means. 3. Starter management module (SMM) which communicates with the chiller control system to perform starting and stopping of the chiller (and water pumps and tower fans, if desired) as well as monitoring starter operation. This module shall include single-cycle dropout protection. 4. Microprocessor-based, 3-phase overload protection with manual reset. 5. Surge protection. 6. Phase loss, reversal, and imbalance protection. 7. Ground-fault protection. 8. Three-phase high and low voltage protection. 9. Three-phase digital ammeter and voltmeter. 10. A control power transformer secondary voltage shall not exceed 120 volts. 11. Primary and secondary overcurrent protection for auxiliary power (control, oil heater, etc.), transformers. 12. Branch circuit breaker for oil pump motor. 13. Pilot relays for control of chilled water pump, condenser water pump, tower for and customer remote alarm. INSULATION Cooler shell and suction piping between evaporator and first stage of each compressor unit shall be insulated and vapor-sealed. LEVELING PACKAGE Chiller shall be provided with leveling package which includes four soleplates, 16 valving screws, leveling pads and 3/8-inch thick neoprene isolation pad. FLOW SWITCHES Flow switches (for chilled and tower water) shall be factory-furnished and installed by others. SOUND RATING Chiller shall be provided with a complete sound attenuation package, including compressor silencer and discharge line sound reduction kit and acoustical sound insulation kit. Chiller shall adhere to the following sound data: Sound Treatment: Compressor Silencer Plus Sound Insulation Blanket Octave Band Center Frequency, Hz 31.5 63 125 250 500 1k 2k 4k 8k Airborne Sound Pressure, dB 70 71 76 73 72 71 71 69 72 A -Weighted Sound Pressure Level, dbA: 78 Estimated Sound Pressure Levels -- dB re: 20 micropascal. TESTING The chiller shall be factory performance tested under full load in accordance with ARI 550. A certified test report shall be provided. Controls operation shall be tested prior to shipment INSTRUCTIONS AND MANUALS Installation instructions and Operation and Maintenance Manuals shall be provided. The provisions and clauses in the RFQ are those in effect through FAC 97-23. The NAICS Code and the small business size standard for this procurement are 333415 and 750 employees, respectively. The quoter shall state in their quotation their size status for this procurement. All qualified responsible business sources may submit a quotation which shall be considered by the agency. Delivery to NASA Langley Research Center is required within 30 days ARO. Delivery shall be FOB Destination. Quotations for the items(s) described above are due by 4:00pm on Friday, February 22, 2001 and may be mailed or faxed to Marie Smith at 757-864-8863 (no telephone calls please) and must include the solicitation number, FOB destination to this Center, proposed delivery schedule, discount/payment terms, warranty duration (if applicable), taxpayer identification number (TIN), identification of any special commercial terms, and be signed by an authorized company representative. Quoters are encouraged to use the Standard Form 1449, Solicitation/Contract/Order for Commercial Items form found at URL: http://procure.arc.nasa.gov/Acq/Forms/Index.html to submit a quotation. A mandatory prebid site visit is scheduled for Friday, February 9, 2001. Participants will meet at 10:00am in Building 1195B, Room 125, West Area. Proposals will not be accepted from any offeror who is not represented at the site visit. If interested in attending the mandatory site visit, please contact Marie Smith via fax at 757-864-8863 (no telephone calls please) and include attendee name(s), company name, company address, citizenship, and telephone number. For technical questions, please contact Robert Charles via e-mail at r.l.charles@larc.nasa.gov. For contractual questions, please contact Marie Smith via e-mail at m.l.smith@larc.nasa.gov. Quoters shall provide the information required by FAR 52.212-1. If the end product(s) quoted is other than domestic end product(s) as defined in the clause entitled "Buy American Act -- Supplies," the quoter shall so state and shall list the country of origin. The Representations and Certifications required by FAR 52.2l2-3 may be obtained via the internet at URL: http://ec.msfc.nasa.gov/msfc/pub/reps_certs/sats/ Addenda to FAR 52.212-4 are as follows: 1852.215-84. FAR 52.212-5 is applicable and the following identified clauses are incorporated by reference. 52.222-3, 52.233-3,52.222-21, 52.222-26, 52.222-35, 52.222-36, 52.222-37, 52.225-3,52.225-21 (21)(i), 52.232-34 The FAR may be obtained via the Internet at URL: http://www.arnet.gov/far/ The NFS may be obtained via the Internet at URL: http://www.hq.nasa.gov/office/procurement/regs/nfstoc.htm Questions regarding this acquisition must be submitted in writing no later than February 16, 2001. Selection and award will be made to the lowest priced, technically acceptable quoter. Technical acceptability will be determined by information submitted by the quoter providing a description in sufficient detail to show that the product quoted meets the Government's requirement. Quoters must provide copies of the provision at 52.212-3, Offeror Representation and Certifications -- Commercial Items with their quote. See above for where to obtain copies of the form via the Internet. An ombudsman has been appointed -- See NASA Specific Note "B". It is the quoter's responsibility to monitor the following Internet site for the release of amendments (if any): http://nais.msfc.nasa.gov/cgi-bin/EPS/bizops.cgi?gr=C&pin=23 Potential quoters will be responsible for downloading their own copy of this combination synopsis/solicitation and amendments (if any). Any referenced notes can be viewed at the following URL: http://genesis.gsfc.nasa.gov/nasanote.html

Web Link

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Record

Loren Data Corp. 20010124/41SOL003.HTM (D-022 SN50B4U9)