1、 INCH-POUND MIL-PRF-23798D(SH) 13 December 2004 SUPERSEDING MIL-A-23798C(SH) 6 March 1995 PERFORMANCE SPECIFICATION AIR CONDITIONER, FAN-COIL ASSEMBLY This specification is approved for use by the Department of the Navy and is available for use by all Departments and Agencies of the Department of De
2、fense. 1. SCOPE 1.1 Scope. This specification covers prefabricated fan-coil assemblies for use in conjunction with a chilled water system for air conditioning spaces onboard Naval surface ships. 1.2 Classification. The fan-coil assemblies are of the following types, sizes, and capacities and composi
3、tions, as specified (see 6.2): 1.2.1 Types. The types of air conditioning fan-coil assemblies are as follows: Type II - Three-section unit consisting of a cooling coil section, fan-motor section, and air distribution plenum section (HI Shock) Type III - Two-section unit consisting of a cooling coil
4、section and fan-motor section (HI Shock) 1.2.2 Sizes. The sizes of air conditioning fan-coil assemblies are as follows: Size Nominal Capacity 1/21 31,300 British thermal units per hour (Btu/h) 22 51,200 Btu/h23 77,600 Btu/h 24 99,800 Btu/h25 151,300 Btu/h Note: 1/See 3.12 and Table I for conditions.
5、 Comments, suggestions, or questions on this document should be addressed to: Commander, Naval Sea Systems Command, ATTN: SEA 05Q, 1333 Isaac Hull Avenue, SE, Stop 5160, Washington Navy Yard DC 20376-5160 or emailed to commandstandardsnavsea.navy.mil, with the subject line “Document Comment”. Since
6、contact information can change, you may want to verify the currency of this address information using the ASSIST Online database at http:/assist.daps.dla.mil. AMSC N/A FSC 4120 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-23798D(SH) 1.2.3
7、Grades. The grades of air conditioning fan-coil assemblies are as follows: HI Shock - Type X - (Non-HI-Shock unit) 1.2.4 Composition. The composition of air conditioning fan-coil assemblies is as follows: M - Magnetic N - Nonmagnetic 1.3 Part or identifying number (PIN). PINs to be used for prefabri
8、cated fan-coil assemblies acquired to this specification are created as follows: M 23798 - X XX X X Prefix for Military Specification Specification Number Type (see code below) Size (see code below) Grade (see code below) Composition (see code below) Type Code Size Code Grade Code Composition Code T
9、ype Code Size Code Grade Code Composition Code II A 21 21 High-shock H M M III B 22 22 Type X X N N 23 23 24 24 25 25 Examples: M23798-A21HM M23798-B24XN 2. APPLICABLE DOCUMENTS 2.1 General. The documents listed in this section are specified in sections 3, 4, or 5 of this specification. This section
10、 does not include documents cited in other sections of this specification or recommended for additional information or as examples. While every effort has been made to ensure the completeness of this list, document users are cautioned that they must meet all specified requirements of documents cited
11、 in sections 3, 4, or 5 of this specification, whether or not they are listed. 2.2 Government documents. 2.2.1 Specifications, standards, and handbooks. The following specifications, standards, and handbooks form a part of this document to the extent specified herein. Unless otherwise specified, the
12、 issues of these documents are those cited in the solicitation or contract. DEPARTMENT OF DEFENSE SPECIFICATIONS TT-P-645 - Primer, Paint, Zinc-Molybdate, Alkyd Type MIL-S-901 - Shock Tests, H.I. (High-Impact) Shipboard Machinery, Equipment, and Systems, Requirements For MIL-DTL-15090 - Enamel, Equi
13、pment, Light Gray (Navy Formula No. 111) 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-23798D(SH) DOD-P-15328 - Primer (Wash), Pretreatment (Formula No. 117 for Metals) (Metric) MIL-PRF-16552 - Filters, Air Environmental Control System, C
14、leanable, Impingement (High Velocity Type) DEPARTMENT OF DEFENSE STANDARDS MIL-STD-167-1 - Mechanical Vibrations of Shipboard Equipment (Type I - Environmental and Type II - Internally Excited) MIL-STD-889 - Dissimilar Metals MIL-STD-1399-300 - Interface Standard for Shipboard Systems, Electric Powe
15、r, Alternating Current (Metric) MIL-STD-2142 - Magnetic Silencing Characteristics, Measurement of (Metric) (Copies of these documents are available online at http:/assist.daps.dla.mil/quicksearch/ or http:/assist.daps.dla.mil or from the Standardization Document Order Desk, 700 Robbins Avenue, Build
16、ing 4D, Philadelphia, PA 19111-5094.) 2.2.2 Other Government documents, drawings, and publications. The following other Government documents, drawings, and publications form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those ci
17、ted in the solicitation or contract. NAVSEA TECHNICAL PUBLICATION S9074-AR-GIB-010/278 - Requirements for Fabrication, Welding and Inspection, and Casting Inspection and Repair for Machinery, Piping and Pressure Vessels (Copies of this document are available from the Naval Inventory Control Point, 7
18、00 Robbins Avenue, Attn: Code 0862 (Cash Sale), Philadelphia, PA 19111, or www.nll.navsup.navy.mil.) 2.3 Non-Government publications. The following documents form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the
19、solicitation or contract. AIR MOVEMENT AND CONTROL ASSOCIATION, INC. (AMCA) AMCA 300 - Reverberant Room Method for Sound Testing of Fans (DoD adopted) (Copies of this document are available from the Air Movement and Control Association, Inc., 30 West University Drive, Arlington Heights, IL 60004 or
20、online at www.amca.org.) AMERICAN NATIONAL STANDARDS INSTITUTE (ANSI)/AMERICAN BEARING MANUFACTURERS ASSOCIATION (ABMA) ANSI/ABMA STD-4 - Tolerance Definitions and Gaging Practices for Ball and Roller Bearings ANSI/ABMA STD-9 - Load Ratings and Fatigue Life for Ball Bearings ANSI/ABMA STD-13 - Rolli
21、ng Bearing Vibration and Noise (Methods of Measuring) ANSI/ABMA STD-15 - Ball Bearings with Spherical Outside Surfaces and Extended Inner Ring Width (Includes Eccentric Locking Collars) ANSI/ABMA/ISO 3290 - Rolling Bearings - Balls - Dimensions and Tolerances (DoD adopted) (Copies of these documents
22、 are available from the American Bearing Manufacturers Association, Inc., 1101 Connecticut Ave., NW, Suite 700, Washington, DC 20036 or online at www.abma-dc.org.) 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-23798D(SH) AMERICAN SOCIETY
23、OF HEATING, REFRIGERATION AND AIR CONDITIONING ENGINEERS (ASHRAE) ASHRAE 33 - Methods of Testing Forced Circulation Air Cooling and Air Heating Coils (DoD adopted) ASHRAE 37 - Methods of Testing for Rating Unitary Air-Conditioning and Heat Pump Equipment (DoD adopted) (Copies of this document are av
24、ailable from the American Society of Heating, Refrigeration, and Air Conditioning Engineers, 1791 Tullie Circle NE, Atlanta, GA 30329 or online at www.ashrae.org.) AMERICAN WELDING SOCIETY (AWS) AWS B2.1 - Welding Procedure and Performance Qualification, Standard For (DoD adopted) AWS B2.2 - Brazing
25、 Procedure and Performance Qualification, Standard For (DoD adopted) (Copies of these documents are available from the American Welding Society, 550 NW LeJeune Road, Miami, FL 33216 or online at www.aws.org.) ASTM INTERNATIONAL ASTM A123 - Standard Specification for Zinc (Hot-Dipped Galvanized) Coat
26、ings on Iron and Steel Products (DoD adopted) ASTM B6 - Standard Specification for Zinc-AASHTO No. M120-77 (DoD adopted) ASTM B633 - Standard Specification for Electrodeposited Coatings of Zinc on Iron and Steel (DoD adopted) ASTM D2092 - Standard Guide for Preparation of Zinc-Coated (Galvanized) St
27、eel Surfaces for Painting (DoD adopted) ASTM E119 - Standard Test Methods for Fire Tests of Building Construction and Materials (DoD adopted) ASTM F1166 - Standard Practice for Human Engineering Design for Marine Systems, Equipment and Facilities (DoD adopted) (Copies of these documents are availabl
28、e from ASTM International, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959 or online at www.astm.org.) INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS (IEEE) IEEE STD 45 - IEEE Recommended Practice for Electric Installations on Shipboard (DoD adopted) (Copies of these documents are availab
29、le from the Institute of Electrical and Electronics Engineers, 445 Hoes Lane, P.O. Box 1331, Piscataway, NJ 08855-1331 or online at www.ieee.org.) NATIONAL ELECTRICAL MANUFACTURERS ASSOCIATION (NEMA) NEMA MG 1 - Motors and Generators (DoD adopted) (Copies of these documents are available from the Na
30、tional Electrical Manufacturers Association, 1300 North 17thStreet, Suite 1847, Rosslyn, VA 22209 or online at www.nema.org.) 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-23798D(SH) RUBBER MANUFACTURERS ASSOCIATION (RMA)/MECHANICAL POWER
31、 TRANSMISSION ASSOCIATION (MPTA)/RUBBER ASSOCIATION OF CANADA (RAC) IP-20 - Specifications for Drives Using Classical V-Belts and Sheaves (Joint RMA/MPTA/RAC) IP-25 - Specifications for Drives Using Variable Speed V-Belts (Joint RMA/MPTA/RAC) (Copies of these documents are available from the Rubber
32、Manufacturers Association, 1400 K Street, NW, Suite 900, Washington, DC 20005 or online at www.rma.org.) 2.4 Order of precedence. In the event of a conflict between the text of this document and the references cited herein, the text of this document takes precedence. Nothing in this document, howeve
33、r, supersedes applicable laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 First article. When specified (see 6.2), a sample shall be subjected to first article inspection in accordance with 4.2. 3.2 Materials. Cast iron shall not be used in fan-coil assembly no
34、r shall cast iron be used in motors, which are components of the fan-coil assembly. Gray cast iron may be used for the fan and motor sheaves. Materials for fan-coil assemblies shall be corrosion-resistant or material shall be protected against corrosion after fabrication. Material degraded during th
35、e fabrication process shall be normalized to restore those properties before assembled in any fan-coil assembly. Selected materials shall be capable of meeting all of the operational and environmental requirements specified herein. 3.2.1 Corrosion protection. Corrosion-resisting steel, galvanized st
36、eel, copper, and brass referenced herein are considered corrosion-resisting materials. Corrosion resisting steel, when fabricated by any method that tends to reduce corrosion-resisting properties, shall be normalized to restore those properties before being assembled in any unit. 3.2.1.1 Corrosion p
37、rotection methods. Parts fabricated from other than corrosion-resisting materials shall be protected against corrosion after fabrication with chemicals, electrolytic processes, plating or paints. The following methods while not restrictive are considered corrosion protection methods when properly ap
38、plied. a. Hot-dipped galvanized in accordance with ASTM A123 with the spelter conforming to grade 5 of ASTM B6. b. Electroplating with zinc in accordance with type LS of ASTM B633 followed by a phosphate treatment conforming to method A of ASTM D2092. c. Hot phosphoric or chromic acid treatment, or
39、a coating of primer in accordance with DOD-P-15328 followed by two coats of primer conforming to TT-P-645. 3.2.2 Hazardous material. Materials for use in the construction of fan-coil assemblies shall have no effect on the health of personnel when the materials are used for intended purpose. Regardle
40、ss of other requirements, materials and parts containing asbestos, cadmium, lithium, mercury, or radioactive material shall not be used. 3.2.3 Fasteners. Material for all bolts, nuts, studs, screws and similar fasteners shall be corrosion-resistant passivated, or of a material rendered resistant to
41、corrosion. Sheet metal screws shall not be used. Galling shall be prevented. Tapped holes shall be reinforced where shearing of thread can occur. 3.2.4 Dissimilar metals. Fan-coil assembly and components shall not degrade due to electrolysis in accordance with MIL-STD-889. 3.2.5 Nonmagnetic material
42、. When nonmagnetic fan-coil assemblies are specified (see 6.2), parts shall be fabricated of nonmagnetic material, which has a maximum relative permeability of less than 2.0 after fabrication. 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF
43、-23798D(SH) 3.2.6 Motor material. Motor material shall conform to the requirements of IEEE STD 45 or NEMA MG 1, as applicable, for nonmagnetic motors. 3.2.7 Recycled, recovered, or environmentally preferable materials. Recycled, recovered, or environmentally preferable materials should be used to th
44、e maximum extent possible, provided that the material meets or exceeds the operational and maintenance requirements, and promotes economically advantageous life cycle costs. 3.3 Painting. The color of the fan-coil assembly shall be Light Gray, Navy Formula 111 of MIL-DTL-15090. 3.4 Welding and allie
45、d processes. Surfaces of parts to be welded or brazed shall be free from rust, scale, paint, grease, and other foreign matter. Welding and allied processes shall be performed by personnel certified to AWS B2.1 and B2.2. NAVSEA Technical Publication S9074-AR-GIB-010/278 shall be used for guidance. 3.
46、5 Identification plates. Each fan-coil shall be provided with a permanently attached corrosion-resistant identification plate. Method of attachment of the identification plate shall be corrosion-resistant. The plate shall contain the following information: a. National stock number (NSN) b. Manufactu
47、rers name, commercial and government entity (CAGE), and part number c. PIN code d. Contract or order number 3.6 Interchangeability. In no case shall parts be physically interchangeable or reversible unless such parts are also interchangeable or reversible with regard to function, performance, and st
48、rength. 3.7 Operating life. The equipment shall have an operating life of 175,000 hours (continuously) except for replaceable parts such as bearings and V-belts. Replaceable parts other than the V-belts shall provide continuous operation for 35,000 hours before replacement is necessary. V-belts shal
49、l provide continuous operation for not less than 17,000 hours before replacement is necessary. 3.8 Workmanship. The fan-coil assembly shall be free from defects that affect appearance and operation. The tube sheets of the cooling coil shall not crack due to punching or forming, and fin collars shall not crack when forming tubes into collars. Fin edges of the cooling coil shall be free of burrs and shall not be bent. Sharp edges, burrs, and other imperfections shall be remove
