1、 Comments, suggestions, or questions on this document should be addressed to U.S. Army Soldier Systems Center, Natick, MA 01760-5018 or emailed to Joseph.MackoulNatick.Army.Mil . Since contact information can change, you may want to verify the currency of this address information using the ASSIST On
2、line database at http:/assist.daps.dla.mil . AMSC N/A FSC 4520 INCH - POUND MIL-PRF-32197 25 April 2006 PERFORMANCE SPECIFICATION HEATER, SPACE - NON-POWERED, LIQUID FUEL, SMALL This specification is approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. T
3、his specification covers the performance and acceptance requirements for a non-powered, liquid fuel burning, 12,000 BTU, radiant space heater for use in the Soldier Crew Tent (SCT) and other 4 or 5 man tents. 2. APPLICABLE DOCUMENTS 2.1 General. The documents listed in this section are specified in
4、sections 3 and 4 of this specification. This section 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 mus
5、t meet all specified requirements documents cited in sections 3 and 4 of this specification, whether or not they are listed. 2.2 Government documents. The following documents form a part of this specification to the extent specified herein. Unless otherwise specified, the issues of the documents are
6、 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). Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-32197 2 STANDARDS DEPARTMENT
7、OF DEFENSE MIL-STD-810 - Environmental Test Methods and Engineering Guidelines (Copies of these documents are available online at http:/assist.daps.dla.mil or from the Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094) 3. REQUIREMENTS 3.1 First article
8、. When specified (see 6.2), a sample shall be subjected to a first article inspection in accordance with 4.2. 3.2 Conformance. When specified (see 6.2), a sample shall be subjected to conformance inspection in accordance with 4.3. 3.3 Operating requirements. Each heater shall satisfy the following u
9、ser-oriented requirements. 3.3.1 Operation. The heater shall operate safely with all specified fuels and under all specified conditions herein with no electrical power. There shall be no exposure of flame during any mode of operation. There shall be no pool of raw liquid fuel in the burner area duri
10、ng operation or in the case of accidental flame loss. 3.3.2 Ignition. The heaters shall not require any electrical power for ignition. Ignition shall be accomplished safely in ten minutes or less with the use of a match. If priming is required it shall be accomplished safely and cleanly with no fuel
11、 spillage. If a device is required to facilitate priming it shall be securely fastened to the heater during transport. 3.3.3 Monitoring. The heaters shall incorporate a sight glass or other means for viewing the entire combustion flame during operation. 3.3.4 Liquid fuel. The heaters shall be safely
12、 operated with all of the fuels listed in Table I. TABLE I. Compatible Fuels Ambient Temperature Range Military Symbol CONUS Above +25 F DF-2 Above +10 F DF-1 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-32197 3 Above -60 F JP8, DFA 3.3.5
13、Fuel supply. The heater shall have an integral fuel tank with sufficient capacity to provide 5 hours of operation when operated at 12,000 BTU/hr output, or higher. The tank shall be shielded from heat. At no time during operation shall fuel temperature exceed 100 F in the tank. The tank shall have a
14、 2-1/4” diameter fill hole to allow refueling and emptying with the fuel spout (NSN 7240-00-177-6154) that goes with the standard military 5 gallon. A small vent to allow makeup air into the tank shall be located on the top of the tank. The vent shall be capable of being closed to prevent fuel spill
15、age during transport of the heater. The heater shall also have the capability to connect to and operate from an external fuel supply. The external fuel supply will be the standard military 5 gallon fuel can elevated 4 feet above the ground with a gravity feed adapter and hose line with a Parker Hann
16、ifin female hose coupler part number B20-5BP. 3.3.6 Fuel control. The heaters shall have a fuel control that maintains a constant flow rate to the burner from the fuel tank with 10 settings. The heater settings shall be visible from a vantage point of two feet in front of the heater when the heater
17、is in the operational configuration inside the SCT. The fuel control shall provide sufficient fuel flow to achieve the full range of required heat outputs corresponding to Table II utilizing no less than 60% of the full range of 10 settings. The settings shall be permanently labeled. The fuel contro
18、l shall control fuel flow to the burner to eliminate any possibility of an unsafe over fire condition. The fuel control shall regulate the firing rate in conjunction with the heater, such that, for over 60% of the full range of settings, smoke levels shall not exceed a # 4 on the Bacharach smoke sca
19、le. The fuel control shall be located so that the heater is adjustable during operation while wearing cold weather gloves NSN 8415-00-227-1220, and it shall be sufficiently isolated from high heat so that it may be adjusted during operation without posing a burn hazard to the operator. 3.3.6.1 Fuel
20、overflow. The heater shall incorporate a fuel overflow device. The device shall divert fuel from the burner to an overflow hose leading to outside the tent in the event of a failure in the fuel control. The hose shall have a minimum length of 3 feet. 3.3.7 On/Off Valve. An on/off valve shall be loca
21、ted in an easily accessible location and shall immediately stop fuel flow to the burner when turned to the off position. The on/off valve shall be located so that it can be manipulated while wearing cold weather gloves NSN 8415-00-227-1220 and it shall be sufficiently isolated from high heat so that
22、 it may be manipulated during operation without posing a burn hazard to the operator. 3.3.8 Fuel filtering. A means to eliminate foreign particles from obstructing fuel flow shall be included. The device shall be located within a protected area on the heater and shall be located to allow for 15 minu
23、te removal, cleaning and installation using only common hand tools without the need for supplemental sealers to prevent leaks. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-32197 4 3.3.9 Combustion efficiency. The heater shall have a combus
24、tion efficiency greater than 50% when operated 10,000 BTU/hr or higher. 3.3.10 Smoke readings. The smoke reading of the heater shall not be greater than a No. 4 on the Bacharach smoke scale when the heater is operated between 9,000 BTU/Hr and 12,000 BTU/Hr. 3.3.11 Heat output. The heater shall provi
25、de the BTU outputs listed in Table II. TABLE II. Heat Output Requireme 6500 BTU)nts ( Ambient (F) Fuel Output (low) Output (high) 40 DF2/DF1 9,000 BTU/Hr 10,000 BTU/Hr -25 JP8/DFA 10,000 BTU/Hr 12,000 BTU/Hr -60 JP8/DFA 10,000 BTU/Hr 12,000 BTU/Hr 3.3.12 Fuel flow. Fuel flow shall stop entering the
26、combustion area during accidental flame loss. At no time shall there be a puddle of raw fuel inside the burner area. 3.3.13 Fuel lines and fittings. Fuel lines and controls shall be sufficiently isolated from the combustion chamber and high heat areas to prevent being adversely affected from heat. F
27、ittings shall not leak and shall be compatible with all fuels specified herein. Any fuel lines within 3 inches of the burner shall be capable of withstanding sustained contact with direct flame without melting or rupturing. 3.3.14 Exhaust pipe assembly. The heater shall be supplied with an exhaust p
28、ipe assembly. The exhaust pipe shall be compatible for use with the Soldier Crew Tent (SCT) (see 3.6.1). The exhaust pipe assembly shall be storable within the heater envelope dimensions in a secure location to prevent damage or loss during transport. A rain cap and guy lines to secure the exhaust p
29、ipe assembly shall be supplied. 3.3.15 Tilt. The heater shall operate at five degrees tilted in any direction without causing a safety hazard or performance degradation. 3.3.16 Safety. The heater and its components shall perform in all modes of operation in a safe manner. All equipment shall include
30、 fail safe features for safety of personnel during installation, operation, maintenance, and repair activities. The heater shall be designed to confine any fuel spillage from possible fuel leakage sources (i.e. hoses, fittings, plumbing, tank, etc) in a location at least 3 inches away from the burne
31、r. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-32197 5 3.3.16.1 Exhaust. Products of combustion shall remain separated from the breathable heated air and shall be directed outside the tent via the exhaust pipe 3.3.16.2 Sharp edges. Non-fu
32、nctional sharp edges and projections shall be eliminated. 3.3.16.3 Noise. Noise levels, as measured from 3 feet from the heater, shall not exceed 60 dB. 3.4 Support or ownership requirements. Each heater shall meet the following logistical requirements. 3.4.1 Weight. The weight of the heater, empty
33、of fuel, including all accessories, shall be less than 34 pounds. 3.4.2 Volume. The outside dimensions of the heater in its packed configuration for transport shall not exceed 1.9 cubic foot. 3.4.3 Bottom surface. The bottom surface of the heater in contact with the floor shall remain at 1508 F or l
34、ess during all modes of operation. 3.4.4 Accessories. The heater shall include all components and tools necessary to facilitate starting and operating the heater. 3.4.5 Mean Time Between Essential Function Failure (MTBEFF)/Maintenance Ratio(MR). The heaters shall meet a quantitative reliability requ
35、irement MTBEFF of 615 hours. An essential function failure (EFF) shall be scored when an incident results in the loss or significant degradation of an essential function that can not be quickly (within 15 minutes) corrected by the crew using only on board tools, spares and repair parts. An incident
36、that causes catastrophic or critical hazards shall also be scored as an EFF. The heater maintainability requirement is a total unit, direct support (DS), general support (GS) MR which shall not to exceed 0.0016 maintenance man-hour per operating hour, not including preventive maintenance checks and
37、services (PMCS). 3.4.6 Preventive maintenance checks and services (PMCS). The heater fuel lines and burner shall be designed in such a manner to allow for operator inspection. PMCS shall not exceed 10 minutes time to accomplish. The minimum PMCS items to be checked shall be secure connections of lin
38、es, fuel leaks, exhaust obstructions, burner, and general condition to permit operation. 3.4.7 Transportability. The heaters shall be transportable in the High Mobility Multipurpose Wheeled Vehicle (HMMWV), heavy-HMMWV, the Commercial Utility Provided by IHSNot for ResaleNo reproduction or networkin
39、g permitted without license from IHS-,-,-MIL-PRF-32197 6 Cargo Vehicle (CUCV), and standard Army cargo trucks (2 to 5 ton) and all standard Army cargo trailers having a 3 to 12 ton capacity. 3.4.7.1 Loose cargo. The heaters shall be of sufficient durability to be transported as loose cargo in any of
40、 the required transport vehicles. 3.4.7.2 Drop. The heaters shall be of sufficient durability to survive an accidental drop from any of the required transport vehicles. 3.4.8 Labels/tags. The heaters shall have an instruction plate permanently attached in an immediately obvious location which provid
41、es warnings, start up and shut down procedures, operating procedures, and safety cautions. The fuel control and heater lettering shall be permanent for the life of the item. Controls shall not obscure labels. Labels shall be located in a consistent manner throughout the system. Labels shall be print
42、ed in capitals. All letters shall be black except for when using a black background the letters shall be white. Letter size and width shall be sufficient to be easily read from a distance of four feet in daylight or with the aid of a flashlight. 3.4.9 Set up. The heater shall be capable of being ass
43、embled for operation in 20 minutes or less, and disassembled and repacked for storage by two people in 15 minutes or less in any climatic category specified herein. 3.4.10 Food/beverage warming. The heater shall have the capability of heating food and water with the standard 8 inch diameter mess kit
44、 pan NSN 7350-00-153-5661. 3.5 Environmental requirements. The heater shall operate as specified under the following environmental conditions. 3.5.1 Storage. The heater and accessories shall remain operable and show no signs of impairment due to storage at 155 F for 4 hours daily. 3.5.2 Basic climat
45、e operation. The heater and accessories shall be operable in temperatures of +60 F to 0 F. Heat outputs shall be in accordance with Table II. 3.5.3 Basic cold operation. The heater and accessories shall be operable in temperatures of -5 F to -25 F. Heat outputs shall be in accordance with Table II.
46、3.5.4 Severe cold operation. The heater and accessories shall be operable in temperatures of -25 F to -60F. Heat outputs shall be in accordance with Table II. 3.5.5 Severe cold manipulation. The heater shall be compatible with temperatures of -60 F allowing unpacking, set up for operation, and stowa
47、ge of all accessories. Fuel hose and hose couplers shall remain flexible and operational. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-32197 7 3.5.6 High altitude. The heaters shall operate safely at a minimum of 85% rated capacity when op
48、erated at altitudes of 4,000 feet above sea level. The heater shall display no signs of backfiring, sputtering or pulsing at high altitude. 3.6 Interface requirements. The heater shall meet the following interface and interoperability requirements. 3.6.1 Tent interface. The heater shall be safely op
49、erated inside the Soldier Crew Tent (SCT) (NSN 8340-01-359-1481). When the heater is configured for operation inside the SCT, controls shall be readily accessible and the hot surfaces of the heater shall be sufficiently isolated from tent walls. 3.6.2 Fuel interface. During test of 4.5.2 the heater shall operate on DF-2 conforming to commercial item description A-A-52557. During tests of 4.5.3
