1、Designation: F 1237 04Standard Specification forCommercial Dishwashing Machines, Multiple-Tank,Continuous Oval-Conveyor Type, Heat Sanitizing1This standard is issued under the fixed designation F 1237; the number immediately following the designation indicates the year oforiginal adoption or, in the
2、 case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) 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
3、specification 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 the standard. The values given in parentheses are forinformation only.1.3 The following safety h
4、azards 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 thisstandard to establish appropriate safety and health practicesand determine t
5、he applicability of regulatory limitations priorto use.2. Referenced Documents2.1 ASTM Standards:2A 167 Specification for Stainless and Heat-ResistingChromium-Nickel Steel Plate, Sheet, and StripB 127 Specification for Nickel-Copper Alloy, (UNSN04400) Plate, Sheet, and StripF 760 Specification for F
6、ood Service Equipment ManualsF 861 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 Generating Equip-ment5NSF/ANSI 14 Plastic Piping System Components and Re
7、-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 Electric Dishwashers2.5 American Society of Sanitary Engineering Standards:7ASSE
8、 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 drinkingutensils.3.1.1.1 DiscussionThe machines shall be capable of re-moving physica
9、l 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. Themachines shall automatically convey racks of soiled dishesthrough the treatment s
10、tages 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, tanks, doors, spray assemblies, pumps, motors,controls, piping, valves, con
11、veying mechanisms, horizontalconveyor tables, heating equipment, and accessories.4. Classification4.1 GeneralDishwashing machines shall be of the types,styles, classes, arrangement, sizes, and capacity groups, asspecified in 4.2-4.6.1This specification is under the jurisdiction of ASTM Committee F26
12、 on FoodService Equipment and is the direct responsibility of Subcommittee F26.01 onCleaning and Sanitation Equipment.Current edition approved Sept. 1, 2004. Published September 2004. Originallyapproved in 1989. Last previous edition approved in 1998 as F 1237 93 (1998).2For referenced ASTM standard
13、s, 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 Summary page onthe ASTM website.3Available from U.S. Government Printing Office Superintendent of Documents,732 N. Capitol
14、 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 booster heater is furnished.6Available from Underwriters Laboratories (UL), Corporate Progress, 333Pfingsten Rd., Northbrook,
15、IL 60062.7Available from the American Society of Sanitary Engineering, P.O. Box 9712,Bay Village, OH 44140.8Available from Standardization Documents Order Desk, DODSSP, Bldg. 4,Section D, 700 Robbins Ave., Philadelphia, PA 19111-50981Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700,
16、West Conshohocken, PA 19428-2959, United States.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 II-CCW (counterclockwise) RotationThis ma-chine shall be designed
17、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 ofmachine connection.4.3.1.1 Class AStyle 1 dishwashing machine that usess
18、team 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 dishwashing machineshall have a pump recirculated prewash unit. T
19、he 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 rail; garbage disposal machine in center of trough.4.5.3 Arrangemen
20、t 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 location.4.6 Capacity240 racks per hour minimum, 1934 by 1934in. (nom
21、inal) or equivalent meeting capacity 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 procurement document.5.1.1 Title, designation number, and date of this specifica-tion.5.1.2 T
22、ype, 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) temperature risesteam or electric booster is required, or stipulate if the requiredtem
23、perature 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 Whether a rinse agent feeder is required (see 7.16),5.1.9 Accessory equipment required, su
24、ch 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, water consump-tion profiles, or productivity profiles are desired (see 12.3).5.1.12 Manufac
25、turers certification, when required (see Sec-tion 13),5.1.13 Whether a silver 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 defects that wouldaffect the performance or maintainability of individual compo-nents of
26、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 of any 300 series stainlesssteel.6.1.3 Corrosion-Resisting MaterialCorrosion-resistingmate
27、rial 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 B 127.6.1.5 PlasticsAll plastic materials and components usedin the dishwashing rinse system shall co
28、nform 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 or electric) and drainage, detergent andrinse agent feeder as applicable, the unit can be used for it
29、sintended 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 excessive splash and spray carryover. Parts requiringadjustment or service, or both, shall be readily acce
30、ssible 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 final rinse of fresh water from an outsidesource. Provisions shall be made to fill the wash and rins
31、e 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 dishwashing machine shall have a conveyor for han-dling 1934 by 1934 in. (nominal) racks, or equivalent me
32、etingcapacity requirement. The conveyor shall be protected by anadjustable slip clutch or other device. Means shall be providedfor releasing or disconnecting the drive power, or the drive incase of jamming. The conveyor shall be driven by a separatemotor. The final rinse spray control shall have a p
33、ositive returnto the OFF position when there are no racks in process toensure the conservation of final rinse water. The machine shallbe provided with tracks of corrosion-resistant steel or othercorrosion-resisting material not less than 0.070 in. (1.78 mm)or equivalent die formed, not less than 0.0
34、59 in. (1.5 mm)thick. Dishwashers shall have an inside working height of notless than 17.5 in. (444.5 mm) above the track.7.2 ConveyorThe conveyor shall be of heavy-duty con-struction, and of suitable corrosion-resisting material. It shallF1237042be designed to convey racks conforming to Specificati
35、on F 861through the dishwasher automatically.7.2.1 Conveyor Clutch SystemAn automatic trouble freeclutch system, springloaded, or adjustable slip clutch, and ofthe automatic re-engaging type, shall be furnished to shut downthe conveyor in case of a jam or other mechanical malfunc-tion(s).7.2.2 Conve
36、yor 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 preassembled with suitable cross bracing and shall befurnished with NSF listed adjustable feet. The table shallinclude a m
37、echanical conveyor system designed to continu-ously transfer dishes or racks at the rate of 6 to 8 ft/min. Theconveyor tables shall be furnished in the arrangement selected(see 4.5). The conveyor table shall be sectioned for shipment.7.3 Piping, Tubing, Fittings, and Valves (Installation)Connections
38、 shall be readily accessible to facilitate installationand maintenance. Piping, tubing, and valves shall be located,when ever possible, on the exterior of the machine.7.3.1 Piping and FittingsWater, steam piping, and fittingsshall be of corrosion-resisting material. Fresh water supply tothe tank sha
39、ll 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 backflow. Back-flow protection shall be in accordance with ASSE No. 1004.The drain and other plumbing connections shall be standardpipe or tubing c
40、onnections. Drainage piping shall be corrosion-resisting material, or suitable heat-resisting plastic tubing withfittings. Drains may be joined into a single trunk line requiringonly one connection or arranged to permit individual connec-tions to the waste line.7.3.2 ValvesWhen specified, steam valv
41、es shall be ofcorrosion-resisting material designed for steam applicationsand for a saturated steam working pressure of 50 psi (345 kPa).When specified, a separately packed service supply valve shallbe provided for closing the supply of water to the dishwasher.The drain valve shall be permanently ma
42、rked to show open andclosed position and shall be lever-operated or wheel-operated,ruggedly designed for foot or hand operation except whendrain valve closure is automatic. Fresh-water rinse valves shallbe reliable and fully automatic and suitable for 210F (98.9C)water. The manually operated valves,
43、 when used, shall beidentified.7.4 Spray AssembliesAll spray nozzles and spray armmanifolds shall be corrosion-resisting materials. All sprayassemblies shall be removable without the use of tools andshall be easy to clean. Final sanitizing rinse spray assemblies,components, or both shall be removabl
44、e 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 steel, Type 302in accordance with Specification A 167.7.6 OverflowThe dishwasher shall have a readily acces-sible overflow drain in the tank. The o
45、verflow unit, or cover,when provided, shall be readily removable for cleaning.7.7 Scrap Trays (Strainers)Scrap trays of corrosion-resistant steel, not less than 0.048 in. (1.219 mm) thick inaccordance with Specification A 167 shall be provided toprevent insoluble matter and large pieces of food resi
46、due frompassing into the tank. The ledges on which the scrap trays restshall be so designed that surfaces beneath the ledge are easilyaccessible for cleaning when 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 s
47、crap 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. (1.219 mm) thick, corrosion-resistantsteel in accordance with Specification A 167, and shall be rigidand stiffened as necessary. Door safety ca
48、tches shall beprovided for maximum operator safety, and the door handlesshall be of insulated handle design. Doors shall be splash-proofand their exposed edges shall be smooth and formed to preventcanting or warping. One door assembly shall be furnished foreach tank. A common door may be furnished f
49、or adjacenttanks, if such door is of sufficient width to provide the requiredaccess. Doors shall be provided with an interlock mechanismto prevent the spray of wash or rinse water when the door isopened.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 to 35 in. (863.6 to 889 mm) above the floor.7.10 Pump and Motor Assemblies:7.10.1 AssembliesThe pump
