1、MIL-C-81752B g7 W 7797706 0256723 b W /- Y MIL-C-81952B(AS) 11 July 1977 Superseding 6 December 197$ MIL-C- 8 195 2A (AS) -_ MILITARY SPECIFICATION COOLER, LIQUID, ELECTRONIC EQUIPMENT HD-957( )/AWM-23(V) This specification has been approved by the Naval Air Systems Command, Department of the Navy 1
2、. SCOPE 1.1 Scope. This specification covers the performance, design, and test requirements for the Electronic Equipment Liquid Coolere(LC) HD-957 The LC shall consist of a cabinet assembly and a ( ) /AWM-23 (V) . 1.2 Classification. remote switching control. culation loop, a chilled water loop, loc
3、al controls and indicators, and elec- tronic subassemblies. The cabinet assembly shall contain a coolant cir- a. Cabinet assembly, major elements Re fer ence Nomenclature Pumping Unit - .Hydraulic Chiller Control Panel, External Gageboard, Internal b. R,emote switching control Nomenclature Control,
4、Remote Switching Paragraph 3.6.1 3.6.2 3.6.3 3.6.4 3.6.5 2. APPLICABLE DOCUMENTS Beneficial comments (recommendations, additions, deletions) and any perti- nent data which may be of use in improving this document should be addressed to: Engineering Specifications and Standards Department (Code 93) N
5、aval Air Engineering Center, Lakehurst, NJ zation Document Impravement Proposal (DD Form 1426) appearing at the end of this document or by letter. . 08733, by using self-addressed Standardi- -1- FSC-4935 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-
6、,-MIL-C-81952B (AS) I 2.1 General. The following documents of the issue specified in AS-4053, Applicable Document List for AWCS Test Set AN/AWM-23(V), form a part of this specification to the extent specified herein. MIL-T-81734 (AS) is the appli- cable general specification for the LC described her
7、ein (see 6.6). SPECIFICATIONS Mil i tarv MIL-M-7793 Meter, Time totalizing MTL-R-16743 RefrigeratingPlants and Systems, Mechanical and Refrigerating System Components - Dichlorodifluoromethane Type 12 - Naval Ship- board Test Set, Airborne Weapon Control System, MIL-T- 8 17 34 (AS) AN/AWM- 2 3 (V) H
8、ughes Air c ia f t Company HMS 20-1458 Material Specification, Fluid, Dielectric HP 10-27 Coolant, Silicate, Ester Base Hughes Process, Dielectric Coolant and Hydraulic Fluid and Operating Systems, Requirements for STANDARDS Military MI L-STD- 761 Electric Power, Alternating Current for Ship- board
9、Use, Characteristics and Utilization of PUBLICATIONS Hughes Aircraft Company. 3282244 Acceptance Test Procedure, Electronic Equipment Liquid Cooler 2.2 Availability of documents. Applicable (see 6.6) 2.3 Precedence of documents. When the requirements of the contract, this specification, or applicabl
10、e subsidiary documents are in conflict, the following precedence shall apply: a. b. c. Contract - The contract shall have precedence over any other document This Specification - This specification shall have precedence over all applicable subsidiary documents (see 6.6) Referenced documents - Any doc
11、ument referenced in this specifi- cation shall have precedence over all applicable documents referenced therein. -2- Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-l752B LI7 7777706 0256725 T 3. REQUIREMENTS 3.1 Materials, parts, and processes
12、. Not applicable. Unless otherwise specified herein, materials, parts and processes shall be in accordance with MIL-R- 16743. 3.2 Design and construction. Applicable. 3.2.1 Design features. Not applicable. Unless otherwise specified herein, design features shall be in accordance with MIL-R-16743. 3.
13、2.1.1 Method of operation. Applicable. 3.2.1.2 Commercial test equipment, Applicable. 3.2.1.2.1 Other commercial components. Applicable. 3.2.1.3 Circuit grounds. Applicable. 3.2.1.4 Interchangeability. Applicable. 3.2.1.5 Identification of product, Applicable. 3.2.1.6 Human factors. Applicable. 3.2.
14、1.7 Test set generated acoustic noise. Applicable. 3.2.1.8 Forced-liquid cooling. The LC shall supply cooling fluid to the test stations and weapon replaceable assemblies (WRAs) listed in Table I at the required operating temperature, pressure, and listed flow rate, 3.2.1.9 Space and weight limitati
15、ons. The cabinet assembly shall not exceed 36 inches by 30 inches by 72 inches. not exceed 8 inches by 4 inches by 8 inches. 1500 pounds. The remote control panel shall The weight shall not exceed o 3.2.1.10 Connectors. Applicable. 3.2.1.11 Secondary electrical power. Not applicable. 3.2.1.12 Interf
16、ace. The LC shall provide the interfaces specified below. 3.2.1.12.1 Test station interfaces. The LC shall interface with Test- Station, Radio Frequency 05-213( )/AWM-23(V), Test Station, Low Frequency 05-215( )/AWM-23(V) and 05-379( )/AWM-23(V) and Stand, Fill-Drain, Coolant System M-4730( )/AWM-23
17、(V) through two utility coolant lines (supply and return). 3.2.1.12.2 Potable water interface. The LC shall interface with the potable water through two utility water lines (supply and return). 3.2.1.12.3 Electrical power interface. The LC shall interface with the electrical power specified in 3.2,Z
18、.l through utility power lines. - 3- Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-L75ZB q7 a 777970b 0256726 L MIL-C-81952B (AS) TABLE I AN/AWG-9 FIRAS AND AN/Amf-23 ELEMENTS SERVICED BY THE LIQUID COOLER ITEM TEST STATION, RADIO FREQUENCY O
19、J- i13 ( ) /AWM- 2 3 (V) a. b. 6. d. e. f. I Oscillator, Radio Frequency 0-1633( )/AWG-9 : Transmitter, Radar T-1224( )/AWG-9 Power Supply PP-6770( )/AWG-9- Power Supply PP-6771( )/AWG-9 Receiver, Radar R-1785( )/AWG-9 Diuiimy Load, Electrical DA- 6 30 ( ) / AWM- 2 3 (V) TEST STATION, LOW FREQUENCY
20、OJ- 2 15 ( ) /AWM- 23 (V) and OJ-379( )/AWM-23(V) a. Antenna Antenna Servo Electronic Subassembly (when tested separately) b . Receiver, Infrared c. Processos, Data d. Dummy Load, Electr,:al e. Dummy Load, Electrical STAND, FILL-DRAIN COOLANT * Combined flow rates for te AS-2764( )/AWG-9 R-1786( )/A
21、WG-9 * CV-2947 ( ) /AWG-9 * DA-631( )/AWM-23(V) DA-632 ( ) /Am- 2 3 (V) MT-4730 ( ) /Awl- 23 (V) t s ition dummy loads and PiRAs under test will not exceed the maximum Elow rate listed for the teat station. * DA-631 and DA-632 are connected in series. * Tested on 05-2151 )/AWM-23(V) only. -4- MAXIMU
22、M * :LOW RATE GPM 6.8 0.2 4.8 0.8 0.8 0.3 5. O 2.5 2.5 1.0 1.0 0.5 o. 1 1.3 * 3.0 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-BL752B LI7 7777706 0256727 3 H MIL-C-81952B (AS) 3.2.2 Utilities. Applicable. 3.2.2.1 Electrical power. Applicable
23、. The LC shall operate from the utility electrical power forms listed in Table II. TABLE II LC ELECTRICAL POWER Item Input Power Forms +29 24 Vdc 440 Vac 60 Hertz CHx), 3-phase, 3-wire, ungrounded 220 Vac, 60 Hz, 3-phase, 3-wire, ungrounded, per MIL-STD-761 Type I. (Alternative power form for van ap
24、plication.) Maximum Load 10 amperes 11.0 kilovolt-amperes (kVA), 0.8 to 1.0 lagging power factor (pf) 11 kVA, 0.8 to 1.0 lagging pf 3.2.2.2 Clean air. Not applicable. 3.2.2.3 Potable water. Applicable. 3.2.2.4 Liquid coolant. Applicable. 3.2.2.5 Helium. Not applicable. 3.2.2.6 Nitrogen. Applicable.
25、3.2.2.7 Hydraulic fluid. Not applicable. 3.2.3 Service conditions. 3.2.3.1 Electrical. Applicable. 3.2.3.2 Environmental. Applicable. In addition, the LC shall withstand There shall be no restrictions surface ships motion of 215 degrees roll, average period 16 seconds and +4 degrees pitch, average p
26、eriod 4 seconds. on the installation of the LC regarding orientation with respect to roll and pitch axes of the ship. 3.2.3.2.1 Organizational level. Not applicable. -5- Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-blIL-6-81952B (AS) 3.2.3.2.2 Int
27、ermediate level. Applicable. 3.2.4 Maintainability. Applicable. 3.2.4.1 Mean time to repair. Applicable. 3.2.4.2 Test points. Applicable. 3.2.4.3 Shop replacable assemblies. Applicable. 3.2.4.4 Self test capability. Not applicable. 3.2.4.5 Access. All maintenance and calibration operations shall be
28、via a6eess Co the front of the liquid cooler within a 36 inch aisle space or to the top of the liquid cooles at the front within the space below a 76 inch overhead. removal and replacement of, but not restricted to, the following items with- out requirements to solder, weld, or saw: The liquid coole
29、r shall provide for access from the front for a. Temperature gages, pressure gages, filter elements, and b. Fuses os circuit breakers c. Valves and piping subassemblies d. e. Pumping unit . Chiller strainer elements Low and high pressure control switches 3.2.4.6 Internal flow bypass. Provisions shal
30、l be incorporated for An operation of the pumping loop independent of the external LC load. orifice which produces a pressure drop of 75 psi at 13 gpm shall be provided in series with a metering valve for flow adjustment across the output cool- ant lines. Flow monitoring capability shall be provided
31、 to permit pressure regulator adjustment:. sliall be provided to facilitate installation and maintenance of the LC. 3.2.4.7 Self-mnintainability features. The controls of 3.6.3 and 3.6.4 3.2.5 Reliability. The mean time between failures shall be SOO hours minimum. 3.2.5.1 Opcrnting. Applicable. 3.2.
32、5.2 Storage life. Applicable. 3.2.5.3 Oterntional stability. Applicable. 3.2. 6 Elcctromagnetic interference (EM). Not applicable. 3.2.7 Utilities protection. Applicable. 3.2.7.1 Liquid cooling protection. Applicable. Liquid cooling protection shall be provided by automatic shut down of the LC. -6-
33、Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-BL752B q7 m 777770b 0256727 7 m a a a ,- MIL-C-81952B (AS) 3.2.7.2 Clean air protection. Not applicable. 3.2.7.3 Electrical power protection. Applicable. 3.2.7.3.1 Emergency shutdown switch. An em
34、ergency shutdown switch shall When the emergency shutdown switch is The switch utilized for this appli- be provided for use by the operator. activated the load side of all LC primary circuit breakers shall be dis- connected from their respective loads. cation shall be of the pushbutton activated, mo
35、mentary type with the push- button finished in red. be marked with alternating orange-yellow and black stripes. shall be centrally located on the external control panel of the LC in an area which is easily accessible to the operator during normal operation. The front panel area around the pushbutton
36、 shall The switch 3.2.8 Calibration cycle. Applicable. 3.2.9 Power switcning and coolant control. The LC shall provide the necessary switching and hydraulic devices to control utility power forms, liquid coolant and potable water. 3.2.10 Displays. Displays provided on the cabinet assembly and on the
37、 remote switching control shall provide an indication of LC operational status. 3.2.11 Installation. The LC shall be capable of supplying coolant to Test Station, Radio Frequency 05-213( )/AWM-23(V), Test Station, Low Frequency 05-215( )/AiyM-23(V) and 05-379( )/AWM-23(V) and Stand, Fill-Drain, Cool
38、ant System MT-4730( )/AWM-23(V) as follows: a. b. No vertical head difference between the LC and the test A maximum of 30 psi drop in the supply and return lines as a closed loop, stations. 3.3 Performance. 3.3.1 General. The LC shall provtde liquid cooling with the following parameters: a. Supply p
39、ressure. the LC shall be+adjustable between 150 and 95 psig and shall be accurate to - 10 psig of the setting. Pressure shall be maintained within 2 5 psi for any flow between 1 and 13 gpm output of the unit. b. Total heat load. The LC shall have the capacity to remove a maximum heat load of 80,000
40、British thermal units per hour (Btu/hour) at a coolant flow of 8 gpm, and 13,000 Btu/hour at a coolant flow of 1.3 gpm. c. Coolant temperature. Input to LC 50 to 125F Pressure of the coolant at the output of +20F Output of LC 65 d. Particulate filtration. 10 microns absolute, full flow e. Reconditio
41、ning filtration. See 3.4.3 - -7- Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-81952B Li9 9999906 025b430 3 MIL-C-81952B (AS) 3.3.2 Organizational level functional requirements. Not applicable. 3.3.3 Intermediate level functional requirements
42、. Applicable. 3.3.4 Warm-up time. Applicable. 3.4 Detailed functional requirements. 3.4.1 Coolant circulation loop. Reservoir-stored coolant shall be filtered and then pumped to the chiller for heat exchange with the chilled water. Temperature and pressure gages chal 1 provide for monitoring. of out
43、put coolant pressures and temperature. A bleed valve shall be provided at the high point and a drain valve shall be provided at the low point. 3.4.2 Particulate filter. A full-flow, depth type disposable filter shall be located in the coolant supply line. The filtir shall have an electrical differen
44、tial pressure indicator to provide an indication of excessive dirt accumulation and provide automatic shut-off of the LC. 3.4.3 Reconditioning fi . The LC shall continuously circulate the coolant at a rate of 1 to 3 gpm through a reconditioning filtration loop consisting of the following: a. b. c. D
45、esiccant filter - Luber-finer Part No. 4493 or equivalent Orifice - to limit pressure and flow Refining pack filter - Lubes-finer Part No. 3132 or equivalen 3.4.4 Coolant reservoir. The coolant reservoir of the LC shall be capable of thc following: a. Volumetric coolant 2.7 cubic feet minimum U. Nit
46、rogen pres- 15 psig nominal from nitrogen c. Safety relief valve 15 psig maximum d. Proof pressure o 20 psig maximum e. Burst pressure 40 psig minimum capaci ty (20 gallons nominal) suri zation setting res ervo ir cylinder specified in 3.6.7 3.4.5 Controls atid indicators. Controls and indicators sh
47、all be provided at the cooling stand. and control of the LC functions. The controls and indicators shall provide monitoring 3.5 Workmnnship. Applicable. 3.U LC elements. The LC shall contain the following elements. 3.U.1 Pumping unit-hydraulic. The pumping unit shall deliver reservoir stored coolant
48、 to the chiller and then to the test stations via the utility coolant lines. phase, 60 iIz power. The pumping unit motor shall operate from 220/440 Vac, 3- -8- Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-L952B-T7 m 9979906 0256933 5 m a. b.
49、 d. e. f. g. h. i. j. k. 1. m. n. C. Local power on indicator lamp Coolant supply pressure gage, 0-300 psi Coolant supply temperature gage, +20 to +180F Coolant return temperature gage, +20 to +MOOF Emergency off switch (see 3.2.7.3.1) Coolant reservoir level sight gage Lamp test switch High coolant supply temperature indicator lamp Low coolant reservoir level indicator lamp High particulate filter press
