1、 A-A-50549 = 9999974 0171784 446 W rnCH-POUND A-A-50549 June 13. 1996 SUPERSEDING 10 April 1992 MIL-H-1645 1F COMMERCIAL ITEM DESCRIPTION HEATERS, WATER, LIQUID FUEL 280,000 BTU/H INPUT CAPACITY) (OIL-FIRED, STORAGE TYPE, NOT EXCEEDING The General Services Administration has authorized the use of th
2、is commercial item description for all federal agencies. 1. SCOPE. This commercial item description covers vertical, light-oil red, storage-type water heaters having thermal inputs not exceeding 280,000 British thermal units per hour (Btu/h) (82,040 Watts 0) and storage capacities up to 100 gallons
3、(gai) (379 liters (L) and constructed to Underwriters Laboratories, Inc. (UL) or American Society of Mechanical Engineers (ASME) requirements. Heaters are intended primarily for use in military residences and similar fhciiities. The heaters may be used in galleys, mess halls, showers, laundries, or
4、shops where thermal input up to 280,000 Btulh (82,040 W) will satis the demand. 2. CLASSIFICATION. Tanks fiirnished on the water heaters shall be of the following types and sizes (see table I and 7.2): Type I - Glass-lined steel. Type II - Stainless steel. Size 30 - 30-gallon (1 14 L) nominal storag
5、e capacity, with 0.5 gdons per hour (gph) Size 30 - 30-gallon (1 14 L) nominal storage capacity, with 0.75 gph (2.84 Wh) Size 40 - 40-gdon (151 L) nominal storage capacity, with 0.85 gph (3.22 Uh) (1.89 liters per hour (LAI) minimum firing rate. minimum firing rate. minimum firing rate. Beneficial c
6、omments, recommendations, additions, deletions, clarifications, etc. and any data which may improve this document should be sent to: Commanding Officer (Code 156), Naval Construction Battalion Center, 1000 23rd Avenue, Port Hueneme, CA 93043-4301. AMSC N/A FSC 4520 DISTRTBUTION STATEMENT A. Approved
7、 for public release; distribution is unlimited. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-50549 Size 50 - 50-gallon (189 L) nominal storage capacity, with 1.20 gph (4.54 Wh) Size 70 - 70-gdon (265 L) nominal storage capacity, with 1.35 gph
8、(5.1 1 Lh) Size 85 - 85-gallon (322 L) nominal storage capacity, with 1.45 gph (5.49 Wh) Size 100 - 100-gallon (379 L) nominal storage capacity, with 1.45 gph minimum firing rate. minimum firing rate. minimum firing rate. (5.49 Wh) minimum ring rate. 3. SALIENT CHARACTERISTICS. 3.1 DescriDtion. The
9、water heaters shall consist of an insulated vertical, steel, water storage tank, a light oil-fired combustion system not exceeding 280,000 Btuh (82,040 W) input capacity, and the operating and safety controls specified herein for completely automatic operation of the heaters for use in application r
10、equiring potable water. 3.2 Standard commercial product. The heaters shall, as a minimum, be in accordance with the requirements of this commercial item description and shall be the manufacturers standard commercial product. Additional or better features which are not specically prohibited by this c
11、ommercial item description but which are a part of the manufacturers standard commercial product, shall be included in the heaters being finished. A standard commercial product is a product which has been sold or is being currently offered for sale on the commercial market through advertisements or
12、manufacturers catalogs, or brochures, and represents the latest product model. 3.3 Codes and standards compliance. The water heaters shall comply with the requirements of a732 or ASME Boiler and Pressure Vessel Code, Section IV. The burner shall comply with UL296 (see 5.2). 3.4 Design. Steel for fab
13、rication of the storage tank shall be commercial quality sheet or plate, chemically constituted, and suitably processed to adapt the steel for application of glass (porcelain enamel) linings. Steel for tanks with glass (porcelain enamel) lining shall be suitable for exposure to fire and products of
14、combustion to which the tank will be exposed. Material in contact with potable water shall be nontoxic, and shall not impart odor, color, or taste to the contained water. The water heater package shall include: flue(s) that terminates in a flue coilar that permits attachment of a sheet metal smoke p
15、ipe; insulation which is held in place with a steel jacket; and a combustion chamber. The water heater shall be suitable for installation in an alcove or a closet as specified (see 7.2). The water heater shall be suitable for installation on non-combustible floors or combustible floors as specified
16、(see 7.2). When the water heaters are required for installation on combustible floors, installation instructions shall be provided on the unit for such application. Water heaters shall meet the capacity and performance requirements as follows: 2 Provided by IHSNot for ResaleNo reproduction or networ
17、king permitted without license from IHS-,-,-A-A-50549 Efficiency Percent a. For heaters 105,000 Btu/h (30,765 W) or less fhing 138,500 Btu/gal(496,924 HL) oil (No. 1 oil) recovery capacity shail be based on DOE regulations, CFR Title 10, Chapter II, Part 430 - Energy Conservation Program for Applian
18、ces, as sole determination. Permissible Nominal Deviation Capacityin Nominal Usgaiions Capaciy liters MO) Storage f.Qm b. For heaters firing 140,000 Btu/gal oil (No. 2 oil), see table I. Firing Rate Min mh L/h, TABLE I. Capacity and performance based on 140.000 Btu/d (502.306 kT/L! of oil. 60“ F (16
19、“ C) nse 75 70 30 (1 14) 30 (1 14) 40 (151) 50 (189) 70 (265) f5 33 f10 +lo +1 o I10 +lo D.50 (1.89) 0.75 (2.84) 0.85 (3.22) 1.35 (5.11) 1.45 (5.49) 1.20 (4.54) 1.45 (5.49) 106 (401) 159 (602) 168 (636) 237 (897) 267 (1011) 287 (1086) 287 (1086) 80“ F (27“ C) 79 (299) 119 (450) 126 (477) 178 (674) 2
20、15 (814) 215 (814) 200 (757) 100 F (38OC) L 63 (238) 95 (360) 101 (382) 142 (537) 160 (606) 172 (651) 172 (651) 3.5 Performance. Performance and capacity requirements specified herein shail be based on fring light fuel oil having a heat content of 138,500 Btu/gal(496,924 kJ/L) for input 105,000 Btu/
21、h (30,765 W) (No. 1 oil) or less water heaters, or 140,000 Btu/gal(502,306 ML) (No. 2 oil) for all water heaters as specified (see 7.2). Operation of the heaters shall be under standard atmospheric conditions (60 degrees Fahrenheit (OF) (16 degrees Celsius (OC) and 14.7 pounds per square inch (psi)
22、atmosphere with an inlet water supply temperature of 6575F (18-24C) and nominal specific heat of water of 8.25 BWgal(29.6 ML) at 120F (49OC). The temperature rise at specific points on and adjacent to the heater shall not exceed the maximum allowable temperature rises specified in UL732. 3.5.1 Combu
23、stion. Observed smoke at ail firing rates under steady-state-test conditions shail not exceed the limits indicated by No. 1 on the Shell-Bacharach Scale with the Model RDC Smokemeter. 3.5.2 Recovery efficiency. 3.5.2.1 For heaters with oil having heat content of 138,500 Btu/gal(496,924 ML). The reco
24、very efficiency for heaters of 105,000 Btuh (30,765 W) or less shall be in accordance with DOE regulations, CFR Title 10, Chapter II, Part 430 - Energy Conservation for Appliances, and shall be the sole determination. Provided by IHSNot for ResaleNo reproduction or networking permitted without licen
25、se from IHS-,-,-A-A-50549 9999974 0171787 I155 A-A-50549 3.5.2.2 For heaters with oil having heat content of 140,000 Btu/gal(SO2,306 HL). The minimum recovery efciency for heaters with thermal input of 105,000 Btu/h (30,765 W) or less shaU be 75 percent and for heaters with thermal input greater tha
26、n 105,000 Btu/h (30,765 W) shaii be 70 percent. 3.6 Tank. The water storage tank shall be of the vertical type and sha withstand the applicable working pressure and test pressures specified in table II. Tanks shall also withstand the proof test pressure specified in table II without damage or failur
27、e of the lining due to such defects as crazing, cracking, or spalling. The tank shall be constructed in accordance with MME Boiler and Pressure Vessel Code, Section IV, Pressure Vessels. Tank shall be fiirnished with a handhole for inspection and cleaning. Type I glass-lined (porcelain-enameled) tan
28、ks shall be equipped with magnesium anodes for cathodic protection. TABLE II. Design pressures. 3.6.1 Tappings and fittings. Tappings and fittings for glass-lined tanks shall be furnished with insulating bushing with instructions on their use attached to the units. For stainless steel tanks, the tap
29、pings and fittings shall be manufacturers standard commercial product for the service required. Tappings and fittings shall have tapered threads in accordance with ANSI B21.1. A separate tapping for a pressure relief valve shall be fillmished in the tank. 3.6.2 Tank linings for Type I, glass-lined s
30、teel tank (porcelain enamel coating). The glass lining shall be applied to ail interior surfaces that are exposed to hot water including handhole and handhole covers when applicable. The thickness of the glass lining shall be in accordance with industry practice. 3.6.3 Type II, stainless steel tank.
31、 Stainless steel shall be manufacturers standard commercial product. 3.7 Oil burners. The oil burners shall be in accordance with UL296. The minimum firing rate for the burners shall be as specified in 2 when firing No. 1 or No. 2 oil per ASTM D396 without exceeding No. 1 smoke limit as indicated on
32、 the Sheil-Bacharach Scale with Model RDC Smokemeter. Unless otherwise specified (see 7.2), the burners shall operate on 115 volts, single phase, 60 hertz. When specified (see 7.2), a motor starter shall be provided as a separate item with overload protection, 3.8 Controls. Unless otherwise specifie
33、d (see 7.2), controls shall operate on 115 volts, single phase, 60 hertz. 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-5 0549 3.8.1 Thermostat. The thermostat shall maintain control within I10 degrees of the thermostat setting, shall encompa
34、ss a range fiom 100F (38C) to at least 160F (71”C), and not allow the water to attain a temperature of more than 200F (93C). 3.8.2 Limit control cutout. The shutoff system shall be the manual reset type and shall intempt the . Water heaters Light oil-fired 8 Provided by IHSNot for ResaleNo reproduct
35、ion or networking permitted without license from IHS-,-,-A-A-50549 m 9999974 0171792 512 m A-A-50549 I MILITARY INTERESTS: CIVIL AGENCY COORDINATING ACTIVITY: Custodians GSA - FSS ArmY-ME Navy - YD1 Air Force - 99 Review Activities PREPARING ACTIVITY: Navy YDl (Project 4520-0380) Army - CE DLA - CS Air Force - 84 Navy - MC 9 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
