Commanding Officer, Code 044/64, USCG Engineering Logistics Center, Bldg. 31, 2nd Floor, Mail Stop 26, 2401 Hawkins Point Road, Baltimore, MD 21226-5000

35 -- COMPRESSOR, CONDENSING UNIT, SEA-WATER COOLED WITH A REFRIGERATION PRODUCING CAPACITY OF 3.0 TONS SOL DTCG40-98-B-40043 DUE 081198 POC Point of Contact -- Sandy Miller, Contract Specialist (410) 762-6452/David H. Monk, Contracting Officer, (410) 762-6456 The US Coast Guard has a requirement for: CLIN 0001: a Compressor/condensing unit, sea water cooled with a refrigeration capacity of 3.0 tons, using refrigerant HFC-134A suitable for marine use, QTY 4 EA. THIS ACQUISITION IS A COMMERCIAL BUY AND IS 100% SMALL BUSINESS SET-ASIDE. Each unit shall include one semi-hermetic electric motor driven multiple cylinder reciprocating compressor, one refrigerant receiver, one seawater cooled condenser, one heat exhcanger, one control panel, limit and safety controls, pressure and temperature instrumentation and all interconnecting piping and wiring. The assembled unit shall not be larger than 30 in. width X 70 in. depth X 84 in. Height. The unit shall consist of: A.-COMPRESSOR -- reciprocating type, capable of producing 3.0 tons with a saturated suction temperature of 105 degree F using HFC-134A, semi-hermetic, 440V, 3 phase, 60 hertz, with isolators, crank case oil heater, oil & suction strainers, and suction & discharge shut-off valves. Automatic capacity control with permits unloaded starting and provides automatic operation. Capacity reduction shall be at east 2 steps. Crankcase Oil heaters 15 VAC, 1 phase, 60 HZ, to automatically de-energize upon compressor start-up. (B) COMPRESSOR RELIEF VALVE -- set to relieve excessive pressure and discharge back into the compressor suction. Only required if compressor is not internally relieved. (C) RECEIVER -refrigerant, horizontal type, 200 lb. capacity at 120 degrees F, test pressure 1.5 times the system working pressure complete with a float type liquid level indicator. (D) CONDENSOR -- seawater cooled, shell and tube type, with sea water flowing thru the tubes, double liquid drains on bottom, 105 degrees F condensing temperature and 90 degrees F sea water inlet terperature. The condenser shall be constructed of a carbon steel shell with 90-10 copper-nickel tubes and tube sheets with bronze removable bolt-on heads for maintenance. Heads to have NPT of 150# ANSI flanged connections. Condenser to have zinc protection. (E) HEAT EXCHANGER -- capable of superheating the suction gas before entering the compressor and to subcool the liquid refrigerant to eliminate flashing in the liquid line. All copper constuction. (F) MOISTURE INDICATOR which visually indicates the presence of moisture in the refrigerant. HFC-134A compatible. (G) FILTE DEHYDRATOR -- permits replacement of cartridges without the need to cut refrigerant lines or undoing brazed connections. Install in the main liquid line. HFC-134A compatible. (H) KING SOLENOID VALVE -- Locate in the main liquid line leaving the receiver. The king solenoid is energized from the compressor motor controller to remain open when the compressor is operating normally under control of the low pressure control switch. The value is de-energized and will close when the compressor is stopped by any other device, i.e., high pressure control switch, low voltage or overload relay, oil pressurefailure switch, stop button or other safety devices. (I) RUPTURE DISC -- for emergency discharge overboard (J) RELIEF VALVES -- A relief valve shall be installed in the equalizing line connecting the condenser and receiver. This valve will relieve pressure which might build up in a full receiver during shutdown when the stop valves are closed. The relief valve will discharge into the condenser. An additonal relief valve shall be installed in a line connecting the refrigerant of the condenser to the rupture disc which inturn will discharge overoard. (K) WATER REGULATING VALVE -- Salt waer application to provide correct flow through condeser under all operation conditions, for sea water service. (L) STRAINER -- compatible with HFC-134A refrigerant, install in the main liquid line. (M) CONTROL PANEL Electrical controls to operate system in manual or automatic modes. Controls and Components shall be marine type. Rated 50 degree Cambient temperature. Mercury switches will not be acceptable. Wires shall be tagged and banded. Control voltage shall be 115V, 1 phase, 60 HZ, Panel shall meet the requirements of IEEE-STD-45-1983. All gauges and indicating lights to be front cabinet mounted. Panel to include, but not limited to the following: 1) Compressor Suction Pressure Gauge -- (min. 3 1/2" in. dia. dial) 2) Compressor discharge Pressure Gauge -- (min. 3 1/2 in. dia. dail) 3) Compressor Oil Pump Pressure Gauge -- (min. 3 1/2 in. dia. dial) 4) Red Indicating Light (compressor high pressure cutout) 5) Red Indicating Light -- "condenser water failure" 6) Red Indicating Light -- "compressor motor overload" 7) High Pressure Control Switch 8) Low Pressure Control Switch, 9) Condenser Water Failure Switch, 10) Compressor Oil Pressure Safety Switch N. COMPRESSOR MOTOR CONTROLLER -- AC magnetic across the line full voltage, non-reversing, 440V, 3 phase, 60 HZ, selector switch for Manual-off-automatic operation. Controls and components shall be marine type, rated for 50 degrees C ambient temperature. Mercury switches will not be acceptable. Wires shall be tagged and banded. Two (2) auxiliary contacts normally open and two (2) normally closed, wired to terminal block for connection to others. Control voltage shall be 115 V, 1 phase, 60 HZ, Panel shall meet the requirements of IEEE-45-1983. All indicating lights to be front cabinet mounted. Panel to include, but not limited to the following: 3) Green Indicating Light (Compressor running), 1) white indicating light (power available), 2) Amber Indicating light compressor crankcase heater on. CLIN 0002. ENGINEERING DRAWINGS FOR ITEM 1 (Vendors off-the shelf drawings depicting dimensions, characteristics, performance ratings, diagramsweight, mechanical and electrical connections and materials of construction CLIN 0003 ASSEMBLY DRAWINGS OF UNIT, (as normally provided) minimum of 3 views of unit, with overall dimensions, and center of gravity located. All connections to be labeled and located. Show maintenance clarances, foundation requirements, unit refrigerant charge information, and a bill of material with quantities and model numbers QTY2 EA, CLIN 0004. PIPING DIAGRAMS, (as normally provided) electrical diagrams and schematics for system with components labeled, QTY 2 EA, CLIN 0005 -- TECHNICAL MANUALS FOR ITEM 1, Original equipment manufacturer's Service Instructions and Parts Lists. Manuals for more than one make/model shall be marked to indicate the make/model suplied, QTY 9 EA. The Coast Guard anticipates issuing the solicitation approximately 30 days after date of this publication. The dates in Block 10 are for informational purposes only. Final acceptance shall be F.O.B. destination. Closing date and time for receipt of bids will be established when the solicitation is issued. Companies interested in bidding on this project may do so by faxing a request to (410) 762-6056 or mailing a request to the address stated above (no telephone request please) to the attention of Sandy Miller. All responsible sources may submit a bid which shall be considered by the agency. Delivery for the ocmpressors within 60 days after award. When calling be prepared to state name, address, and Solicitation Number. This notice is for informational purposes: ATTENTION: Minority, Women-Owned, and Disadvantaged Lending Program (STLP) offers working capital financing in the form of lines of credit to finance accounts receivable for transportation related contracts. Maximum line of credit is $500,000. with interest at the prime rate. For further information call (800) 532-1169. Internet address: htp://osdbuweb.dot.gov. For information concerning the acquisition, contact the Contracting Officer listed above. (AC0707007-04) Posted 07/09/98. (0190)

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