1、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 CommandStandardsnavy.mil, with the subject line “Document Comment”. Since contact
2、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 6320 INCH-POUND MIL-PRF-32225 25 October 2006 PERFORMANCE SPECIFICATION HEAT SENSOR, ADVANCED FIRE AND SMOKE SENSOR SYSTEM (AFSSS) This
3、specification is approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers the performance requirements for spot-type heat sensors (see 6.8.9 and 6.8.10) and their universal bases and junction boxes, which are components of an overal
4、l Advanced Fire and Smoke Sensor System (AFSSS) for use on naval ships. These heat sensors, universal bases, and junction boxes may be of commercial-off-the-shelf (COTS) design, but must be rugged (see 6.8.19) enough to meet all of the requirements of this performance specification and the rigors of
5、 Navy shipboard service. Performance requirements for the other associated AFSSS components (e.g., ionization (see 6.8.11) and photoelectric (see 6.8.14) smoke sensors (see 6.8.23), flame detectors (see 6.8.7), Flame Detector Zone Modules (FDZM) (see 6.8.8), Switch Closure Zone Modules (SCZM) (see 6
6、.8.25), isolators (see 6.8.12), and alarm panel (see 6.8.2) are contained in their respective AFSSS specifications. 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 does not include documents cited in o
7、ther 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 in sections 3, 4, or 5 of this specif
8、ication, 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 issues of these documents are those c
9、ited in the solicitation or contract. DEPARTMENT OF DEFENSE SPECIFICATIONS MIL-S-901 - Shock Tests, H.I. (High Impact); Shipboard Machinery, Equipment and Systems, Requirements for MIL-E-2036 - Enclosures for Electric and Electronic Equipment MIL-DTL-24643 - Cables and Cords, Electric, Low Smoke, fo
10、r Shipboard Use General Specifications for Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-32225 DEPARTMENT OF DEFENSE STANDARDS MIL-STD-167-1 - Mechanical Vibrations of Shipboard Equipment (Type I - Environmental and Type II - Internally Exc
11、ited) MIL-STD-461 - Requirements for the Control of Electromagnetic Interference Characteristics of Subsystems and Equipment (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 Rob
12、bins Avenue, Building 4D, Philadelphia, PA 19111-5094.) 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 solicitation or contract. NATIONAL FIRE PROTE
13、CTION ASSOCIATION (NFPA) NFPA 72 - National Fire Alarm Code (Copies of this document are available from National Fire Protection Association, One Batterymarch Park, Quincy, MA 02269 or online at http:/www.nfpa.org/.) UNDERWRITERS LABORATORIES INC. (UL) UL 521 - Heat Detectors for Fire Protective Sig
14、naling Systems (Copies of this document are available from Underwriters Laboratories, Inc., 333 Pfingsten Road, Northbrook, IL 60062-2096 or online at .) 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 t
15、akes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 First article. When specified (see 6.2 and 6.3), a sample shall be subjected to first article inspection in accordance with 4.23.2 Design
16、requirements. 3.2.1 Design, materials, and manufacturing processes. The contractor shall select the materials, but the materials shall meet all of the interface, operational, and performance requirements specified herein. 3.2.2 Recycled, recovered, or environmentally preferable materials. Recycled,
17、recovered, or environmentally preferable materials should be used to the maximum extent possible, provided that the material meets or exceeds the operational and maintenance requirements, and promotes economically advantageous life cycle costs. 3.2.3 Restricted materials. Mercury shall not be used i
18、n heat sensors. 3.3 Configuration. The overall heat sensor shall consist of a heat sensor head, a universal sensor base, and a junction box. Alternately, the universal sensor base and junction box may be combined into one unit, provided this one unit meets all of the combined requirements of both th
19、e universal sensor base and the junction box. The term, “heat sensor,” as used in this specification, refers to the overall heat sensor consisting of the heat sensor head, the universal sensor base, and the junction box or, alternately, the heat sensor head and a combined universal sensor base and j
20、unction box. 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-32225 3.3.1 Sensor head. The heat sensor head shall contain the actual heat-sensing element of the heat sensor. When the temperature at the sensor exceeds the fixed temperature (s
21、ee 6.8.6) alarm threshold chosen for the sensor, an alarm shall be indicated at the AFSSS alarm panel. In addition, when the rate of temperature rise (see 6.8.16) at the sensor exceeds the rate of temperature rise alarm threshold (if selected for the sensor), an alarm shall be indicated at the AFSSS
22、 alarm panel. The heat sensor head shall be compatible with the universal sensor base and shall securely attach to it but be easily attached and removed without the need for special tools. The sensor head, including the actual heat-sensing element (if exposed to the environment), shall be rugged eno
23、ugh to withstand gentle cleaning with water, water with mild detergent, or the manufacturers recommended cleaner or cleaning method in the event of dust and dirt build-up. Sensor heads shall operate properly in both overhead (vertical) and bulkhead (horizontal) mounted positions. Heat sensors shall
24、be restorable after alarm, but only after a reset (see 6.8.17) at the alarm panel is manually executed and the temperature at the sensor is below its alarm threshold (i.e., heat sensor alarms shall latch at the alarm panel). 3.3.1.1 Interchangeability. The AFSSS heat sensor head shall have a unique
25、model number assigned to it and shall be physically identical and interchangeable with all other AFSSS heat sensor heads from the same manufacturer. 3.3.1.2 Fixed temperature alarm threshold function of heat sensor head. In addition to the requirements of 3.3.1.3, heat sensors shall be able to be ea
26、sily set/programmed by the AFSSS alarm panel to any of a minimum of three discrete fixed temperature alarm threshold settings. The nominal fixed temperature alarm threshold (sensitivity) settings shall be 105 F, 135 F, and 155 F. Initial selection and later changing of all discrete fixed temperature
27、 alarm threshold settings shall be easily executable at the AFSSS alarm panel (using at least a middle security access level) for individual sensors, without the need to make changes or adjustments at the individual sensors. For all heat sensor heads, any of the (at least) three nominal fixed temper
28、ature alarm thresholds may be chosen in combination with any of the (at least) three nominal rate of temperature rise alarm thresholds of 3.3.1.3. 3.3.1.3 Rate of temperature rise alarm threshold function of heat sensor head. In addition to the requirements of 3.3.1.2, heat sensors shall be able to
29、be easily set/programmed by the AFSSS alarm panel to any of a minimum of three discrete rates of temperature rise alarm threshold settings. The nominal rate of temperature rise alarm threshold (sensitivity) settings shall be 15 F per minute, 20 F per minute and “no rate of temperature rise alarm thr
30、eshold setting selected” (i.e., the heat sensor has only a fixed temperature alarm threshold setting). Initial selection and later changing of all discrete rate of temperature rise alarm threshold settings shall be easily executable at the AFSSS alarm panel (using at least a middle security access l
31、evel) for individual heat sensors, without the need to make changes or adjustments at the individual sensors. For all heat sensor heads, any of the (at least) three nominal rate of temperature rise alarm thresholds may be chosen in combination with any of the (at least) three nominal fixed temperatu
32、re alarm thresholds of 3.3.1.2. 3.3.2 Universal sensor base. The universal sensor base shall securely accept attachment of heat sensor heads and AFSSS ionization and photoelectric smoke sensor heads. The base shall be universal, permitting direct interchange between and compatibility with the heat s
33、ensor head and the AFSSS ionization and photoelectric smoke sensor heads from the same manufacturer. Universal sensor bases shall operate properly in both overhead (vertical) and bulkhead (horizontal) mounted positions. The universal sensor base and junction box may be combined into one unit, provid
34、ed this one unit meets all of the combined requirements of both the universal sensor base and the junction box. 3.3.2.1 Interchangeability. The AFSSS universal sensor base from the same manufacturer shall have a unique model number assigned to it and shall be physically identical and interchangeable
35、 with all other AFSSS universal sensor bases from the same manufacturer. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-32225 3.3.3 Individual addressability and LED. Either the sensor head or the universal sensor base shall have an adjust
36、able mechanical device or dipswitch that can be easily set to allow each sensor to be individually identifiable and addressable (see 6.8.1) by the alarm panel once installed in a specific location in a shipboard compartment. Once set, this device or dipswitch shall be easily capable of later being s
37、et to a different address, without the use of special tools or equipment, to support sensor head or base interchangeability. Either the sensor head or the universal sensor base shall also contain one or more LEDs. Failure of any LED shall not interfere with the operation of the head or base or the t
38、ransmission of sensor information or alarm or trouble signals (see 6.8.26) to the alarm panel. The LED(s) shall be capable of visually showing the condition of the sensor head and universal base. The LED(s) shall distinctly identify the three possible sensor states: State 1: Power is not being suppl
39、ied to the sensor or the sensor is not properly operating (darkened LED). State 2: Power is being supplied to the sensor and the sensor is operating but is not in an alarm state. State 3: Power is being supplied to the sensor and the sensor is in an alarm state. 3.3.4 Junction box. A junction box sh
40、all securely accept attachment of the universal sensor base. The junction box and universal sensor base may be combined into one unit, provided this one unit meets all of the combined requirements of both the universal sensor base and the junction box. All junction boxes from the same manufacturer u
41、sed for heat sensors shall be identical and shall also be identical to those used for AFSSS ionization and photoelectric smoke sensors. The junction box shall possess two flat areas to allow two separate LS2SWU-1 cables (See MIL-DTL-24643) with appropriate watertight stuffing tubes (See MIL-E-2036)
42、to penetrate the junction box. The conductors of the LS2SWU-1 cables shall provide sensor power and supervision from the alarm panel and shall be wired to the universal sensor base. The junction box shall provide a conductive path for the shields of the LS2SWU-1 cables to connect to the ships hull t
43、o provide shield termination. The junction box shall possess mounting tabs or brackets with clearance holes for bolts that will secure the junction box to 1-inch long threaded-female metal standoffs welded to the overhead or bulkhead of the compartment. When installed on the overhead of a compartmen
44、t, the junction box shall be drip-proof such that water falling from above shall not enter the junction box. Therefore, standard 4-inch electrical boxes with holes or knockout plugs (which are commonly used for mounting commercial grade heat sensors and bases, but are not drip-proof) are not permitt
45、ed as junction boxes. 3.4 Drip-proof. When installed on the overhead of a compartment, the overall heat sensor shall be drip-proof (15 degrees) in accordance with MIL-E-2036 such that water falling from above shall not enter the junction box, universal sensor base, or sensor head. 3.5 Weight. The to
46、tal weight of the heat sensor (consisting of the sensor head, the universal sensor base, and the junction box) shall not exceed 3 pounds. 3.6 Size. Heat sensors (consisting of the sensor head, the universal sensor base, and the junction box) shall have a low profile. The maximum height of the overal
47、l heat sensor, assembled with sensor head mounted on the universal base and the junction box, shall not exceed 7 inches. The maximum diameter of the overall heat sensor shall not exceed 8 inches. 3.7 Interface requirements. 3.7.1 Electrical interface. Heat sensor heads and their universal sensor bas
48、es shall obtain power from and be compatible with the UL listed AFSSS alarm panel. The universal bases of the heat sensors shall be two-conductor devices, whose power supply terminals are the same as their signaling terminals. The cable used to interface the alarm panel with the heat sensors (via th
49、eir universal bases and junction boxes) shall be LS2SWU-1. The LS2SWU-1 cabling shall be routed from the alarm panel to the various sensors throughout the ships compartments and then return to the alarm panel in a looped NFPA 72, Style 6, Class A signaling line circuit (see 6.8.22) arrangement so that single opens on the loop will not result in the loss of any sensors. 3.7.2 Ship interface. The heat sensors shall attach to their universal bases, which, in turn, shall attach to their
