1、-73- sssqaoss 3 m MIL-C-23889D 23,December I983 SUPERSEDING MIL-C-23880C 3 May 1978 N IL ITARY S PEG IF ICAT ION . CABINETS, FOOD WARMING, ELECTRIC, PASS-THROUGH AND REACH-IN This specification is approved or use by the Naval Facilities Engineering Command, Department of the Navy, and is available f
2、or use by all Departments -and Agencies of the Department of Defense. 1. SCOPE * 1.1 Scope. This specification covers electrically heated, pass-through, and reach-in stationary food warming cabinets. * 1.2 gl for sizes 4, 8, an 12; a minimum of four shelves per section for size 15, and a minimum of
3、6ovantesn shelves per section for sizes 18, 36, and 54. Corrosion-resisting chalf supports shall permit adjustment on 1-inch centers. When The number of doors per 3,7.%.4 Adiustable universal angles. When specified (see 6.21, the cabinet sectisn(s1 shall be provided with sufficient sets of adjustabl
4、e universal angles to satisfy ;he size requirements listed in 1.21 shall be capable of rigidly supporting fully loaded pans and trays having deptho up to 4-1/2 inches, and shall be readily adjustable on 1-or 1-1/2 inch CeiitePB. The following pan sizes (in inches) shall be accommodated: 26, 20 by 24
5、, 12 by 20, and 14 by 18. The angles 18 by * 3.701.5 m. Unless otherwise specified (see 6.21, cabinets shall be supportad on adjustable legs. When specified (see 6.21, sizes 15, 18, 36, and 54 cIial% be supported on an enclosed base,. Legs and feet shall be fastened to the cabinet in a manner to pre
6、vent the accumulation of dirt. betpieen fest and legs shall be drip-proof construction in which any openings larger than 1/32 inch shall be sealed. UmbStrUcted clearance between the floor and the lowest horizontal member of the cabiaaee, excluding service connections. NSF-approved construction. All
7、openings Legs shall provide a minimum 6-inch Both legs and feet shall be of 3.7.2. Tvpa II and III food warmiscabinets. Type II and 111 cabinets shall be paz-through or reach-in as specified (see 6.2). 3.7.2.1 Cabinet. Three sections (compartments) shall be included, arranded verti_cally in type II
8、cabinets. the cobfnet shall be corrosion-resisting steel, not less than C.036-inch thick, properly polished and finished. rosisring steel not less than 0.047-inch thick. The bottom panel my be .galvanized or ahminized steel not less than 0.036-inch thick. frone, back, and bottom panels shall be weld
9、ed to form a rigid cabinet, and the top panel shall be fastened by screws. fmmts, a six-sided partition of aluminized steel not less than 0.024-inch thick chal1 be located inside the cabinet. Outer panels shall be filled with 2-inch fiberglass material compressed to 1.5 inch or foam with equivalent
10、rating, minimum “KI factor of 2.60. Between the partition and the sections shall be an air space of at least 1.5 inch to pernic circulation o? heated air, for cabinets utilizing a continuous thermal type cable element, no air space shall be maintained between insultion and inner shell. Cabinets with
11、 either element shall. maintain a uniform temperature within each sections. The inner partition of aluminized steel shall. be adequently supported and reinforced and shall be attached to the outer panels by small welded metal spacers. of the cabinet in contact with food, or which is visible, shall b
12、e made from colroehn-resisting steel. Construction of the type I11 cabinet shall be indentical with the requirements of type II, except type 111 shall have two compartments. of 22 inches wide by 30-1/2 inches deep by 27 inches high. The side, front, and rear panels of The top panel shall be corrosio
13、n- The side, For cabinets utilizing two heating The space between partition and Hardware components and any part Each type III compartment shall have minimum inside dimensions Each compartment 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-2
14、3BBOD 73 W 7799706 024OLOL 5 W M nL- C- 2 3880D shall have individual thermostat control. The reach-in cabints shall be of identical size as the pass-through cabinets minus the thickness of the rear doors. * 3.7.2.1.1 Sections (compartments2. Each section shall be die-stamped and constructed of corr
15、osion-resisting steel not less than 0.030-inch thick. The front flange of the section shall be 3/8-inch high and shall fit into an embossed surface stamped into the front panel of the body. Each section shall have hole(s) which will act as vent(s) for moisture control (see 3.9.1). Each section shall
16、 be secured to the body with screws an supported underneath by a steel channel. Sections shall be completely removable for inspection, cleaning, or replacement. * 3.7-2.1.2 ompartment capacity (type II cabinetl. Each side of the top section of this three Compartment cabinet shall have two pairs of c
17、orrosion- resisting steel wall studs riveted in place to support adjustable currosion- resisting steel angle-support brackets to provide a capacity of six or more 12 inch by 20 inch by 4-inch pans. The center and bottom sections shall be similarly equipped with three pairs of wall studs and brackets
18、 to provide a capacity of eight 12 inch by 20 inch by 4 inch or eight inch by 26-inch bun pans or trays for each compartment. The type Il cabinet shall accomodate a minimum of ten 12 inch by 20 inch by 2-inch food service pans in each compartment. 26 inches long. * 3.7.2.1.3 Cae III cabinet2. Each s
19、ide of the top and bottom section of this two compartment cabinet shall have two pairs of corrosion-resisting steel wall studs riveted in place to support adjustable corrosion-resisting steel angle-support brackets to provide a capacity of 10 or more 12 inch by 20 inch by 4-inch pans and a minimum o
20、f thirteen 18 inch by 26-inch bun pans or tays, or eighteen 12 inch by 20 inch by 2-inch food service panc in each compartment. The brackets for both sections shall be 5 -inches wide and 26 inches long. The brackets for all sections shall be 5 inches wide and 3.7.2.2 Doors, The doors shall be die-st
21、amped and of double-pan type construction securely welded together with corners ground and polished and all seams soLder-filled for sanitation. panels shall be reinforced internally for mounting of required hardware. doors panels shall be not less than 0.036-inch thick. of two vertical halves which
22、open and close simultaneously. each half of the door shall overlap the cabinet body to insure a tight seal. Gaskets may be used in the cabinet or doors. shall be mounted in the.top of each section and shall provide an automatic stop to hold the door in the open position. doors including the handles
23、shall not exceed the overall width of the cabinet. resisting steel shall be mounted vertically n the outer panel of each half door be screws. hinges. without the need of special tools. within the hinge. panels to permit a movement of 90“ and shall be securely fastened to the door by three screws and
24、 to the cabinet by three screws. The space between the inner and outer The Each door shall consist Three sides of An opening and closing mechanism When in the open position, the The panels shall be embossed or strength. A handle of corrosion- The doors shall be mouned on corrosion-resisting spring T
25、he spring tension of the hinge shall be adjustable externally the spring shall be completely concealed Hinges shall be mounted on the left and right cabinet 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-H IL- C- 238801) * 3.7.2.3 5F to 150 within
26、 a period of 30 minutes. The individual sections shall be capable of maintaining a temperatare within 10F of any thermostat setting within the range Of 150-20OoF. * 3.8 Electr.ica1 wirim component$. Unless otherwise specified (see 6.21, food warming cabinets in sizes 4, 8, 12, 15, and 18 shall be wi
27、red for operation with a power supply of 120 volts (VI, single phase, 60 Hertz (Hz); cabinets in sizes 36 and 54, and of types i1 and H.1, shall be wired for 240 V, single phase, 60 Hz. When specified (see 6.21, type i cabinets in sizes 36 and 54, and type II and 111 cabinets shall be wired for eith
28、er 208V, 60 112, single phase for continental United States (CONUS); or 220V, 50 Hz, single phase for European requirements. components, such as controllers, switches, heaters, blowers, and solenoid valves shall bear the UL listing mark and be listed in the UL Electrical Construction Materials List,
29、 and shall be installed in accordance with NFPA No. 70. The disconnect switch shall have a voltage and current rating conforming to the requirements of NFPA No. 70. cabinets shall be equipped with overload protective devices. shall be furnished with each cabinet. All wire, cord, and electrical When
30、specified (see 6.21, a disconnect switch shall be furnished. Disconnect switches for type 11 and Ill A wiring diagram * 3.9.1 -heater. Each section of the food warming cabinet shall be equipped with thermostatically controlled electric heating elements. wattage rating specified herein shall be based
31、 on 120V or 240V, as applicable. when operation of sizes 36 and 54, and type II or LI1 on 208V is specified (see 6.21, the resistance of the elements shall be decreased in order to provide the heat output equivalent to the heat output on 240V. The For 8 Provided by IHSNot for ResaleNo reproduction o
32、r networking permitted without license from IHS-,-,-MIL-C-23BBOD 73 W 7777906 0240103 7 MIL-C-23880D type I cabinets, each section shall be equipped with one or more elements having a total rating per section of not less than I000 watts (W). and location of the elements shall be such as to insure co
33、mpliance with 3.8.2.Heating for type II and Ill cabinets shall be by means of two heating elements or by a continuous thermal heating cable in accordance with the manufacturers standard practice. The heating elements shall be mounted ia the air space of the cabinet between the aluminized steel parti
34、tion and the bottom of each section. Each heater shall be rated at a minimum of 500W for a total of not less than 1OOOW per section and 3000W per cabinet for the three compartment cabinet or not less than 1500W per section and 3000W per cabinet for the two compartment cabinets. These elements shall
35、operate on the power specified (see 3.9). The terminal shall be on one end facing the front of the cabinet. The heaters shalI be mounted on two brackets. heater element shall be a steel. baffle covered with insulation to properly direct the flow of heat within the cabinet air space. The heating cabl
36、e element shall be evenly wrapped around each inner shell af the cabinet, and rated at a minimum of 5OOW for 50 feet af element, or 100 feet of element for a total of not less than 1OOOW per section. The thermal type cable element shall be continuous, and in direct contact with insulaticin specified
37、 in 3.12. Heat shall be directed to the interior of the cabinet. For type 1, II, and I11 cabinets, the heating elements and wiring shall be completely concealed to protect units from food spillage or injury to the user, as a result of accidental contact. Heating elements shall not be located in the
38、same area in which food is stored. The number Surrounding each Heating elements shall not permit cooking of food. 3.9-2 Thermostat. A readily accessible thermostat shall be installed in each section to permit heat adjustment and automatic temperature regulations within the minimum range of 150F and
39、200F. * 3.9.3 Switch. Each section of the food warming cabinet shall be equipped with an ON-OFF switch unless the thermostat provides an ON-OFF control. type I cabinets, each section shall be furnished with at least one signal light to indicate that the heating element(s) are energized. Ill cabinets
40、, two signal lights shall be furnished for each section. One amber colored light shall glow when electric powe-r is connected tro the cabinet. The red colored indicator light shall glow when the thermostat is operating and the preselected temperature has not been reached. selected temperature has be
41、en reached, the xed indicator Light shall extinguish automatically, For For type Il an When the 3.9.4 Power SUPPV cord and P I I does not hold required number of pans. (1.2) I Maximum overall dimensions exceeded; I other dimensions not as sepcified. (3.1) I Material not as specified; defective I I m
42、aterials affecting usability of the (3.4) I I units. I Cabinets of one lot not identical to I I I interchangeability of parts, I componenets, and assemblies. (3.5) I I I I requirements: positive protection I against electrical shock not provided. (3.6) I I I NSF No. 2 and NSF No. 4; exteriors not I
43、meeting construction requirements (3.7) I 1 I 107 Panels not fitted and sealed as required; I I insulation not of sufficient thickness; I I I I I I I I hinges; locks not provided. Hardware not of material specified. (3.7.1.2) I I f I 109 Minimum number of shelves not provided; I shelf suports not ad
44、justable as required. (3.7.1.3) I I 110 Sufficient sets of adjustable angles not I I I I (3.7.1.4) I I I specified. I 111 Legs not adjustable or provide harborage I I for bacteria and dirt. (3.7.1.5) I I lo2 I 103 I 104 1 the extent required to insure Design not in accordance with safety I 105 Const
45、ruction not in accordance with I *O6 I insulation not provided between sections. (3.7.1.1) I Doors not hinged so as to provide full access to interior; not provided with positive action latches or spring loaded furnished or not adjutable as required; angles will not accept all pan sizes 12 Provided
46、by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-23880D 73 m 779790b 02Li0107 b 9 I Major! I 112 I I I I 114 I I 115 I I. . I I 116 I I 117 I I I I I I I I 119 I I I I I I 120 I I I 121 I I 122 I MIL-C-23880D TABLE II. Classification of defects. (continu
47、ed) I Dimensions of type II and III cabinets I not as specified; panels not of required I thickness and material; insulation not I as specified; minimum air space not I provided; inner partition not provided I as required; inside dimensions for l type III not as specified; each I compartment not pro
48、vided with individual I Construction of compartments not as I specified; each section not provided I- with holds) for moisture control; I compartments not equipped with I sufficient brackets to provide pan (3.7.2.1.1 I capacity specified; sections not 3.7.2.1.2, I removable. 3.7.2,1.3) I thermostat.
49、 (3.7.2.1) 1 Doors not fabricated as specified; I I I I I I I I I automatic strops not provided; hinges not externally adjustable; door movement Base not as specified; provision not made -Moisture control device not provided not restricted to 90. (3.7.2.2) 1 for height adjustment. (3.7.2.3) I each section; parts in contact with food not of corrosion-resisting steel; vents not covered; dampers not constructed as specified; pushbuttons not provided or for not identified; door vent(s) not pro
