1、Designation: F1237 09Standard Specification forCommercial Dishwashing Machines, Multiple-Tank,Continuous Oval-Conveyor Type, Heat Sanitizing1This standard is issued under the fixed designation F1237; the number immediately following the designation indicates the year oforiginal adoption or, in the c
2、ase of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.1. Scope1.1 This spe
3、cification covers commercial multiple-tankdishwashing machines of the continuous type, oval shaped,with horizontal table conveyor systems.1.2 The values stated in inch-pound units are to be regardedas standard. The values given in parentheses are mathematicalconversions to SI units that are provided
4、 for information onlyand are not considered standard.1.3 The following safety hazards caveat pertains only toSection 12, Test Methods, of this specification: This standarddoes not purport to address all of the safety concerns, if any,associated with its use. It is the responsibility of the user of t
5、hisstandard to establish appropriate safety and health practicesand determine the applicability of regulatory limitations priorto use.2. Referenced Documents2.1 ASTM Standards:2A167 Specification for Stainless and Heat-ResistingChromium-Nickel Steel Plate, Sheet, and StripB127 Specification for Nick
6、el-Copper Alloy (UNSN04400) Plate, Sheet, and StripF760 Specification for Food Service Equipment ManualsF861 Specification for Commercial Dishwashing Racks2.2 Federal Regulations:3OSHA Title 292.3 NSF International Standards:4NSF/ANSI 3 Commercial Warewashing EquipmentNSF/ANSI 5 Commercial Hot Water
7、 Generating Equip-ment5NSF/ANSI 14 Plastic Piping System Components and Re-lated MaterialsNSF/ANSI 29 Detergent/Chemical Feeders for CommercialSpray-Type Dishwashing MachinesNSF/ANSI 51 Food Equipment MaterialsNSF ListingsFood Equipment2.4 Underwriters Laboratories Standard:6UL 921 Commercial Electr
8、ic Dishwashers2.5 American Society of Sanitary Engineering Standards:7ASSE 1004 Dishwashers2.6 Military Standard:8MIL-STD-129 Marking for Shipment and Storage3. Terminology3.1 Definition:3.1.1 commercial dishwashing machinesmachines thatuniformly wash, rinse, and heat sanitize eating and drinkingute
9、nsils.3.1.1.1 DiscussionThe machines shall be capable of re-moving physical soil from properly racked and prescrappeditems, and sanitizing multiple-use eating and drinking utensils.The dishwashing machine and conveyor-table, when as-sembled, shall form an oval-shaped dish handling system. Themachine
10、s shall automatically convey racks of soiled dishesthrough the treatment stages of the machine, conveying themout to the clean dish removal area of the conveyor. Thedishwashing machines shall consist of the following principalparts: legs, recirculating pre-wash chamber, wash chamber,rinse chamber, t
11、anks, doors, spray assemblies, pumps, motors,1This specification is under the jurisdiction of ASTM Committee F26 on FoodService Equipment and is the direct responsibility of Subcommittee F26.01 onCleaning and Sanitation Equipment.Current edition approved Oct. 1, 2009. Published October 2009. Origina
12、llyapproved in 1989. Last previous edition approved in 2004 as F1237 04. DOI:10.1520/F1237-09.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document
13、 Summary page onthe ASTM website.3Available from U.S. Government Printing Office Superintendent of Documents,732 N. Capitol St., NW, Mail Stop: SDE, Washington, DC 20401.4Available from NSF International, P.O. Box 130140, 789 N. Dixboro Rd., AnnArbor, MI 48113-0140.5NSF /ANSI 5 applies only if a boo
14、ster heater is furnished.6Available from Underwriters Laboratories (UL), Corporate Progress, 333Pfingsten Rd., Northbrook, IL 60062.7Available from ASSE International, 901 Canterbury, Suite A, Westlake, OH44145.8Available from Standardization Documents Order Desk, DODSSP, Bldg. 4,Section D, 700 Robb
15、ins Ave., Philadelphia, PA 19111-50981Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.controls, piping, valves, conveying mechanisms, horizontalconveyor tables, heating equipment, and accessories.4. Classification4.1 GeneralDishwashin
16、g machines shall be of the types,styles, classes, arrangement, sizes, and capacity groups, asspecified in 4.2-4.6.4.2 Types:4.2.1 Type I-CW (clockwise) Rotation This machine shallbe designed and supplied to accept the feeding of soiledtableware from the right side, when viewed from above.4.2.2 Type
17、II-CCW (counterclockwise) RotationThis ma-chine shall be designed and supplied to accept the feeding ofsoiled tableware from the left side, when viewed from above.4.3 Styles and Classes:4.3.1 Style 1 (Steam Heated)Low-pressure steam 20 to35 psi (137.9 to 241.3 kPa) flowing pressure at point ofmachin
18、e connection.4.3.1.1 Class AStyle 1 dishwashing machine that usessteam injectors.4.3.1.2 Class BStyle 1 dishwashing machine that usesheat exchange steam coils.4.3.2 Style 2 (Electrically Heated).4.3.3 Style 3 (Gas Heated)4.3.3.1 Class CNatural gas.4.3.3.2 Class DLP gas.4.4 Style 4 (Pre-Wash Unit)The
19、 dishwashing machineshall have a pump recirculated prewash unit. The automaticprewash unit shall be fitted to, or be a part of the dishwashingmachine.4.5 Arrangement:4.5.1 Arrangement AWith tray rail and table-mountedgarbage disposal machine.4.5.2 Arrangement BWith food waste trough instead oftray r
20、ail; garbage disposal machine in center of trough.4.5.3 Arrangement CSame as Arrangement A, exceptdisposal unit not furnished; food discharged to garbage can atdisposal location.4.5.4 Arrangement DSame as Arrangement B, exceptdisposal unit not furnished; food discharged to garbage can atdisposal loc
21、ation.4.6 Capacity240 racks per hour minimum, 19-34 by 19-34in. (501.6 by 501.6 mm) (nominal) or equivalent meetingcapacity requirement.5. Ordering Information5.1 Purchasers should select the preferred options permittedin this specification and include the information in 5.1.1 and5.1.2 in the procur
22、ement document.5.1.1 Title, designation number, and date of this specifica-tion.5.1.2 Type, style, class, and arrangement required (see 4.1),5.1.3 Noise level requirements, if other than specified (see11.2),5.1.4 Whether a service-supply valve is required (see 7.5),5.1.5 Whether a standard 40F (22C)
23、 temperature risesteam or electric booster is required, or stipulate if the requiredtemperature rise is more than 40F (22C) (see 7.14),5.1.6 Electrical power supply characteristics (current, volt-age, phase, frequency) (see Section 8),5.1.7 Whether a detergent feeder is required (see 7.15),5.1.8 Whe
24、ther a rinse agent feeder is required (see 7.16),5.1.9 Accessory equipment required, such as end cowls withvent openings, or spare and maintenance parts as suggested bythe manufacturer.5.1.10 Treatment and painting if other than specified (seeSection 10),5.1.11 When energy consumption profiles, wate
25、r consump-tion profiles, or productivity profiles are desired (see 12.3).5.1.12 Manufacturers certification, when required (see Sec-tion 13),5.1.13 Whether a flatware soak sink is required (see 7.16).6. Materials6.1 All materials shall be specified as follows:6.1.1 Materials used shall be free from
26、defects that wouldaffect the performance or maintainability of individual compo-nents of the overall assembly. The dishwashing machines shallmeet the material design and construction requirements ofNSF/ANSI 3.6.1.2 Corrosion-Resistant SteelCorrosion-resistant steelshall conform to the requirements o
27、f any 200, 300, or 400series stainless steel.6.1.3 Corrosion-Resisting MaterialCorrosion-resistingmaterial is material other than corrosion-resistant steel that isequivalent in the dishwasher application.6.1.4 Nickel-Copper AlloyNickel-copper alloy shall con-form to the requirements of Specification
28、 B127.6.1.5 PlasticsAll plastic materials and components usedin the dishwashing rinse system shall conform to NSF/ANSI 14or NSF/ANSI 51.7. Construction Requirements7.1 The dishwashing machine shall be complete so thatwhen connected to the specified source of power, water supply,heating means (steam
29、or electric) and drainage, detergent andrinse agent feeder as applicable, the unit can be used for itsintended function. Dishwashers shall be quiet in operation, freefrom objectionable splashing of water to the outside of themachine. The machine shall be equipped with splash curtainsto prevent exces
30、sive splash and spray carryover. Parts requiringadjustment or service, or both, shall be readily accessible fromthe front and side of the machine. The machine shall washdishes by means of a water and detergent solution pumpedfrom a tank and shall pump rinse the dishes under pumppressure prior to the
31、 final rinse of fresh water from an outsidesource. Provisions shall be made to fill the wash and rinse tankeither directly from the regular hot water supply with a handvalve or through the booster or solenoid, or both, provided thewater temperatures comply with the provisions of NSF/ANSI3. The dishw
32、ashing machine shall have a conveyor for han-dling 19-34 by 19-34 in. (501.6 by 501.6 mm) (nominal) racks,or equivalent meeting capacity requirement. The conveyorshall be protected by an adjustable slip clutch or other device.Means shall be provided for releasing or disconnecting thedrive power, or
33、the drive in case of jamming. The conveyorshall be driven by a separate motor. The final rinse sprayF1237 092control shall have a positive return to the OFF position whenthere are no racks in process to ensure the conservation of finalrinse water. The machine shall be provided with tracks ofcorrosio
34、n-resistant steel or other corrosion-resisting materialnot less than 0.070 in. (1.78 mm) or equivalent die formed, notless than 0.059 in. (1.5 mm) thick. Dishwashers shall have aninside working height of not less than 17.5 in. (444.5 mm)above the track.7.2 ConveyorThe conveyor shall be of heavy-duty
35、 con-struction, and of suitable corrosion-resisting material. It shallbe designed to convey racks conforming to Specification F861through the dishwasher automatically.7.2.1 Conveyor Clutch SystemAn automatic trouble freeclutch system, springloaded, or adjustable slip clutch, and ofthe automatic re-e
36、ngaging type, shall be furnished to shut downthe conveyor in case of a jam or other mechanical malfunc-tion(s).7.2.2 Conveyor Table(s)The conveyor table shall be con-structed of not less than 0.070 in. thick (1.78 mm) corrosion-resistant steel or other corrosion-resisting material. The legsshall be
37、preassembled with suitable cross bracing and shall befurnished with NSF certified adjustable feet. The table shallinclude a mechanical conveyor system designed to continu-ously transfer dishes or racks at the rate of 6 to 8 ft/min (1.8 to2.4 m/min). The conveyor tables shall be furnished in thearran
38、gement selected (see 4.5). The conveyor table shall besectioned for shipment.7.3 Piping, Tubing, Fittings, and Valves (Installation)Connections shall be readily accessible to facilitate installationand maintenance. Piping, tubing, and valves shall be located,when ever possible, on the exterior of th
39、e machine.7.3.1 Piping and FittingsWater, steam piping, and fittingsshall be of corrosion-resisting material. Fresh water supply tothe tank shall be discharged not lower than 2 in. (50.8 mm)above the maximum flood level rim, or an effective air gap orvacuum breaker shall be installed to prevent back
40、flow. Back-flow protection shall be in accordance with ASSE No. 1004.The drain and other plumbing connections shall be standardpipe or tubing connections. Drainage piping shall be corrosion-resisting material, or suitable heat-resisting plastic tubing withfittings. Drains may be joined into a single
41、 trunk line requiringonly one connection or arranged to permit individual connec-tions to the waste line.7.3.2 ValvesWhen specified, steam valves shall be ofcorrosion-resisting material designed for steam applicationsand for a saturated steam working pressure of 50 psi (345 kPa).When specified, a se
42、parately packed service supply valve shallbe provided for closing the supply of water to the dishwasher.The drain valve shall be permanently marked to show open andclosed position and shall be lever-operated or wheel-operated,ruggedly designed for foot or hand operation except whendrain valve closur
43、e is automatic. Fresh-water rinse valves shallbe reliable and fully automatic and suitable for 210F (98.9C)water. The manually operated valves, when used, shall beidentified.7.4 Spray AssembliesAll spray nozzles and spray armmanifolds shall be corrosion-resisting materials. All sprayassemblies shall
44、 be removable without the use of tools andshall be easy to clean. Final sanitizing rinse spray assemblies,components, or both shall be removable for deliming, descal-ing, and similar maintenance.7.5 TankThe tank shall be constructed of not less than0.048 in. (1.219 mm) thick corrosion-resistant stee
45、l, Type 302in accordance with Specification A167.7.6 OverflowThe dishwasher shall have a readily acces-sible overflow drain in the tank. The overflow unit, or cover,when provided, shall be readily removable for cleaning.7.7 Scrap Trays (Strainers)Scrap trays of corrosion-resistant steel, not less th
46、an 0.048 in. (1.219 mm) thick inaccordance with Specification A167 shall be provided toprevent insoluble matter and large pieces of food residue frompassing into the tank. The ledges on which the scrap trays restshall be so designed that surfaces beneath the ledge are easilyaccessible for cleaning w
47、hen the trays are removed. Anyopening around or between scrap trays shall be held to aminimum, and as close as practical to the size of the scrap trayopening.7.8 Access Door(s)Access door(s) shall be provided forease of machine clean-out. The door(s) shall be constructed ofnot less than 0.048 in. (1
48、.219 mm) thick, corrosion-resistantsteel in accordance with Specification A167, and shall be rigidand stiffened as necessary. Door safety catches shall beprovided for maximum operator safety on sliding doors. Doorsshall be splash-proof and their exposed edges shall be smoothand formed to prevent can
49、ting or warping. One door assemblyshall be furnished for each tank. A common door may befurnished for adjacent tanks, if such door is of sufficient widthto provide the required access. Doors shall be provided with aninterlock mechanism to prevent the spray of wash or rinsewater when the door is opened.7.9 Legs (Feet)The machine shall be rigidly constructedand have four or more legs (feet) made of corrosion-resistantsteel, or other corrosion-resisting material. Legs shall beadjustable, so that the height of the track may be varied from34
