1、t i MIL-FRF-44035B 9949906 2044633 b4T H I INCH-POUND I MIL-PRF-44035B 28 Ju IV 1997 SUPERSEDING MIL-R-44035A 21 January 1987 PERFORMANCE SPECIFICATION REFRIGERATION UNITS, ELECTRIC, 4000 BTU FOR REFRIGERATOR-CONTAINER, FIELD, 8 FEET BY 8 FEET BY 10 FEET This specification is approved for use by all
2、 Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 SCOD. This document covers one type and size of insulated, electric refrigeration unit having a capacity of 4000 British thermal units (Btu) per hour and used with an 8 foot by 8 foot by 10 foot refrigerator-container (see 6.1). 2.
3、 APPLICABLE DOCUMENTS 2.1 General. The documents listed in this section are specified in sections 3 and 4 of this specification. section does not include documents cited in other sections of this specification or recommended for additional information or as examples. completeness of this list, docum
4、ent users are cautioned that they must meet all specified requirements documents specified in sections 3 and 4 of this specification, whether or not they are listed. This While every effort has been made to ensure the 2.2 Government documents. Beneficial comments (recommendations, additions, deletio
5、ns) and any pertinent data which may be used in improving this document should be addressed to: U.S. Army Natick Research, Development and Engineering Center, Natick, MA 01760-5018 by using the Standardization Document Improvement Proposal (DD Form 1426) I appearing at the end of thi; document or- b
6、y letter. AMSC N/A FSC 4110 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-PRF-44035B 0b 2044bL4 5Bb = 2.2.1 Sta ndards. The following standards form part of this document to the extent specified herein. Unless otherwise specified, the issues o
7、f these documents are those listed in the issue of the Department of Defense Index of Specifications and Standards (DoDISS) and supplement thereto, cited in the solicitation (see 6.2). STANDARDS DEPARTMENT OF DEFENSE MIL-STD-461 - Requirements for the Control of MIL-STD-462 - Measurement of Electrom
8、agnetic Interference MIL-STD-810 - Environmental Test Methods and Engineering MIL-STD-1474- Noise Limits for Army Materiel (Metric) Electromagnetic Interference Emissions and Susceptibility Characteristics Guidelines (Unless otherwise indicated, copies of the above standards are available from The S
9、tandardization Documents Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094). 2.3 Non-Government mblications. The following documents form a part of this specification to the extent specified herein. Unless otherwise specified, the issues of the documents which are DoD adopted
10、are those listed in the issue of the DoDISS cited in the solicitation. Unless otherwise specified, the issues of documents not listed in the DoDISS are the issues of the documents cited in the solicitation (see 6.2). NATIONAL FIRE PROTECTION ASSOCIATION (NFPA) Standard No. 70 - National Electrical C
11、ode (Application for copies should be addressed to the National Fire Protection Association, One Battery March Park, Quincy, MA 02269-9101). NATIONAL ELECTRICAL MANUFACTURERS ASSOCIATION (NEMA) Standards Publication No. 250 - Enclosures for Electrical Equipment 2 Provided by IHSNot for ResaleNo repr
12、oduction or networking permitted without license from IHS-,-,- MIL-PRF-44035B W 9999906 2044635 412 W MIL-PRF-44035B (Application for copies should be addressed to the National Electrical Manufacturers Association, 1300 No. 17th Street, Suite 1847, Rosalyn, VA 22209). UNDERWRITERS LABORATORIES INC.
13、(UL) Standard 207 - Refrigerant Containing Components and Standard 303 - Refrigerant and Air Conditioning Condensing and Standard 353 - Limit Controls Accessories, Nonelectrical Compressor Units (Application for copies should be addressed to the Underwriters Laboratories Inc., 333 Pfingsten Road, No
14、rthbrook, IL 60062- 2096). INTERNATIONAL ORGANIZATION FOR STANDARDIZATION Standard 1496-2 - Thermal Containers (Application for copies should be addressed to the American National Standards Institute, 11 West 42nd Street, New York, NY 10036). 2.4 Order of p recedence. In the event of a conflict betw
15、een the text of this document and the references cited herein, the text of this document takes precedence. document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. Nothing in this 3. REQUIREMENTS 3.1 First article . When specified (see 6.2), a samp
16、le shall be subjected to first article inspection in accordance with 4.1.1. 3.2 op eratinu recruirementa. Refrigeration units shall satisfy the following minimum functional, operational and performance requirements. 3.2.1 4-hour orieration. Refrigeration units shall operate properly with suction and
17、 discharge pressures safely controlled. 3.2.2 72-hour operation. Refrigeration units shall operate properly and maintain proper conditions at thermostat sittings of 0F and 35F. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-44035B 9999906
18、2044616 359 m MIL-PRF-44035B 3.2.3 Refriaerat ion caDacity. Refrigeration units shall have minimum net capacities of 4000 Btu/hr at a thermostat setting of OF and 6000 Btu/hr at a thermostat setting of 35OF. 3.2.4 Heatinu caDacitv. Refrigeration units shall have a gross heating capacity of not less
19、than 3000 Btu/hr at a thermostat setting not less than 45F. 3.2.5 Defrost svst.em. Refrigeration units shall have a defrost cycle terminated by temperature, automatically initiated by a time control adjustable between 4 and 24 hours and have the capacity to produce not less than 6 pounds of condensa
20、te within 30 minutes. The defrost system shall have provisions for manual defrost override. 3.2.6 Draj nacre svstem . Refrigeration units shall have a drainage system for the collection and discharge of condensate to the outside of the unit. 3.2.7 Moisture content. The moisture content of the refrig
21、eration system shall be kept at a minimum to maintain proper operation of the refrigeration unit. 3.2.8 Refrigerant leakaae. Refrigerant containing components shall be gastight. 3.2.9 - n 1. The refrigeration units shall have a control panel for the operator having, but not limited tor the following
22、 items: 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. li. 3.2.10 Start and stop control Operation indicator Refrigerator internal temperature control Refrigeration unit running time indicator High and low side pressure indicators Refrigerator interior temperature indicator Manual defrost control Defrost operation
23、indicator Heating cycle operation indicator Refrigeration cycle operation indicator Power supply circuit breaker Ozone - depletina substances. The refrigerant shall be commercially available nonozone-depleting, and environmentally safe. Class I ozone-depleting substances, as determined by the Enviro
24、nmental Protection Agency (EPA), shall not be contained in, 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIt-PRF-qY035B D 9999906 2044637 295 D MIL-PRF-44035B and shall be prohibited from use during the fabrication of the refrigeration units (s
25、ee 6.6). 3.2.11 TemDeratu re cont rol. The selected temperature of the refrigeration units shall be controlled automatically. The temperature control shall allow an incremental selection of normal refrigerator/freezer temperatures. When temperature settings selected are below 20F, the heating cycle
26、shall not operate. 3.2.12 Power reauirements. Unless otherwise specified (see 6.2), the refrigeration units shall operate on 208/230 volt, 3- phase, 60-hertz (Hz), and 200 volt, 3-phase, 50-Hz power. 3.2.12.1 Power suisislv ca ble. The unit shall be supplied with a minimum 50-foot power supply cable
27、 capable of operating properly with the power source and permanently attached to the outside of the refrigeration unit. The cable shall have a quick-disconnect, male-female fitting located at a minimum distance of 6 feet from the refrigeration unit housing. 3.2.12.2 Liahtina DO wer sutmlv - cable. T
28、he refrigeration unit shall be supplied with a minimum 36-foot SO type cable for 110 volt container lighting permanently attached to the outside of the refrigeration unit. 3.2.13 Finish. The refrigeration units, except where detrimental to proper operation, shall have a nontoxic chemical agent resis
29、tant green finish (see 6.7.1). The word “CARC“, together with the month and year of finishing, shall be stencilled near the identification plate in block letters not less than 1 inch high using lusterless black chemical agent resisting paint (see 6.7.2). All paint shall be properly applied. 3.2.14 S
30、afetv. The refrigeration units shall minimize flammability, operational and personnel hazards. 3.2.15 Airflow. The air exiting the evaporator shall be directed to create proper circulation inside the refrigerator it is used with. 3.3 SumDort or ownership recruirements. Refrigeration units shall meet
31、 the following requirements. 3.3.1 TransDortab ilitv. Refrigeration units shall be able to be handled by a forklift truck and have devices allowing personnel to position the unit. 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-HIh-CRF-4Q835B m 799
32、9906 2044638 323 m MIL-PRF-44035B 3.3.2 nesian reliabilitv . Refrigeration units shall be reliable and designed to operate without failure when subjected to the design reliability test. 3.3.3 Service a nd maintenance. All major components shall be accessible for adjustment, maintenance, servicing, a
33、nd replacement without removing any other major component. All other components and assemblies shall be designed for ease of installation and replacement and shall be accessible for maintenance, service, and replacement with minimum disturbance to adjacent components. No special tools shall be neede
34、d for any maintenance, repair, service, installation or replacement action. Condenser and evaporator fins shall be protected from any damage that might occur during servicing or maintenance actions. Operator personnel shall be able to visually check the moisture content of the refrigeration system o
35、n all refrigeration units. All points requiring lubrication shall be equipped with standard fittings and shall be accessible from the outside of the unit. Each unit shall have the fittings or location tagged to indicate the temperature and grade of lubricant used and recommended frequency of lubrica
36、tion. 3.3.4 Marking. Identification, instruction, control, and gage plates shall be of corrosion resistant material permanently attached to the outside of the unit. Numbering and lettering shall be permanently inscribed and shall be no less than 1/16“ high. All plates shall blend with the enclosure
37、finish and shall have a nonreflective finish. 3.3.4.1 Ide ntificat ion islate . The data name plate shall contain the following information: 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. U.S. Model number and nomenclature National Stock Number (NSN) Serial number Contract number Manufacturers name and address
38、Manufacturers model number Commercial and Government Entity (CAGE) number Technical manual number, if applicable (see 6.2 and 6.5) Weight Refrigerant used 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-PRF-44035B = %Ob 2044bL Ob8 MIL-PRF-4403
39、5B 3.3.4.1.1 Marine Corps ide ntificatjon Dlate. When the procurement is for the Marine Corps (see 6.2), the identification plates, together with any data that differs from the above (3.3.4.1) shall be obtained from the Commandant of the Marine Corps (Code CS6), Headquarters, Marine Corps, Washingto
40、n, DC 20380. 3.3.4.2 Instru ction Dlates. The instruction plates shall contain the wiring and refrigerant cycle diagrams and instructions for start-up, operation, defrosting, shutdown and preventive maintenance. 3.3.4.3 Cont rol and gaae nam edates. All controls and gages shall have identifying name
41、plates. 3.3.4.4 Electrical wirinq. Electrical wiring shall be marked to allow identification with the wiring diagram. 3.3.5 Jnte rchanaeab ilitv. Component parts of the refrigeration unit which are replaceableble shall be inter- changeable with the same parts of other units furnished under the same
42、contract. 3.3.6 Weiuht. The weight of the refrigeration units shall not be greater than 600 pounds including the refrigerant and all necessary lubricants. 3.4 Environmental reuuirements. Refrigeration units shall operate under the following environmental conditions. 3.4.1 Ambient temperature. The re
43、frigeration units shall start and operate in an ambient temperature of 125F. 3.4.2 Rainfal 1. The refrigeration units shall operate in rainfall and after being subjected to cleaning by high pressure hoses. 3.4.3 Shock. The refrigeration units shall operate. properly after being subject to shock. 3.4
44、.4 FF m * ilit . When specified (see 6-21, the refrigeration units shall not exceed radiated emission (RE) 102 limits for ground applications (Navy fixed and AF) over a range of 2 mega hertz (MHz) to 400 MHz or conducted emission (CE) 102 limits. Short duration interference shall be exempt. 3.4.5 St
45、oraa e. The refrigeration units shall remain operable after storage in temperatures of minus 65F to plus 155F. 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-8 MIL-PRF-44035B 3.4.6 Noise level. The noise level at personnel “operators“ and “servici
46、ng“ positions shall not damage personnel hearing. 3.4.7 Corrosion resistance. The refrigeration units shall operate after exposure to a salt fog atmosphere. 3.5 Interface and interonerabilitv reuuirements. The refrigeration units shall be designed for use with, and fit into the opening of the 8 foot
47、 by 8 foot by 10 foot refrigerator- container (see figure 1 and 6.1) and shall have overall dimensions no greater than those shown on figure 2. 4. VERIFICATION 4.1 Classification of inmections. The inspection requirements specified herein are classified as follows: a. First article inspection (see 4
48、.1.1) b. Conformance inspection (see 4.1.2) 4.1.1 First article inmectioq . When a first article inspection is required (see 3.1 and 6.2), a sample shall be examined for all the verifications listed in table I. 8 Provided by IHSNot for ResaleNo reproduction or networking permitted without license fr
49、om IHS-,-,- flIL-PRF-44035B 9999906 2044b2L 716 4.3.2.12 II I I I Airflow I Weight ENVIRONMENTAL REQUIREMENTS Ambient temperature 3.3.6 3.4 3.4.1 I Refrigerant leakage 3.2.8 4.3.2.7 4.3.2.8 Rainfall 3.4.2 4.3.4.2 Shock 3.4.3 4.3.4.3 Electromagnetic Storage Noise level compatibility 3.4.4 3.4.5 3.4.6 Corrosion resistance INTERFACE AM) INTEROPERABILITY REQUIREMENTS 3.4.7 3.5 MIL-PRF-44035
