1、Designation: F1237 15 An American National StandardStandard 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 of
2、original adoption or, in the case 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 U.S. Departm
3、ent of Defense.1. Scope1.1 This 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 standard. The values given in parentheses are mathematicalconver
4、sions to SI units that are provided 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
5、the responsibility of the user of thisstandard to establish appropriate safety and health practicesand determine the applicability of regulatory limitations priorto use.2. Referenced Documents2.1 ASTM Standards:2A240/A240M Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet,
6、and Strip for PressureVessels and for General ApplicationsB127 Specification for Nickel-Copper Alloy (UNS N04400)Plate, Sheet, and StripF760 Specification for Food Service Equipment ManualsF861 Specification for Commercial Dishwashing RacksF1920 Test Method for Performance of Rack Conveyor,Commercia
7、l Dishwashing Machines2.2 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-lated MaterialsNSF/ANSI 29 Detergent/Chemical Feeders for
8、CommercialSpray-Type Dishwashing MachinesNSF/ANSI 51 Food Equipment MaterialsNSF ListingsFood Equipment2.4 Underwriters Laboratories Standard:6UL 921 Commercial Electric Dishwashers2.5 ASSE International:7ASSE 1004 Dishwashers2.6 Military Standard:8MIL-STD-129 Marking for Shipment and Storage3. Term
9、inology3.1 Definitions:3.1.1 commercial dishwashing machinesmachines thatuniformly wash, rinse, and sanitize eating and drinking uten-sils.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 drin
10、king utensils.The dishwashing machine and conveyor-table, whenassembled, shall form an oval-shaped dish handling system.The machines shall automatically convey racks of soiled dishesthrough the treatment stages of the machine, conveying themout to the clean dish removal area of the conveyor. Thedish
11、washing machines shall consist of the following principalparts: legs, recirculating pre-wash chamber, wash chamber,rinse chamber, tanks, doors, spray assemblies, pumps, motors,1This specification is under the jurisdiction of ASTM Committee F26 on FoodService Equipment and is the direct responsibilit
12、y of Subcommittee F26.01 onCleaning and Sanitation Equipment.Current edition approved Aug. 1, 2015. Published September 2015. Originallyapproved in 1989. Last previous edition approved in 2009 as F1237 09. DOI:10.1520/F1237-15.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orc
13、ontact 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 St., NW, Mail Stop: SDE, Washington, DC 204
14、01.4Available 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 UL LLC, 333 Pfingsten Rd., Northbrook, IL 60062.7Available from ASSE International, 18927 Hickory Creek Drive, Suite 220,Moken
15、a, IL 60448.8Available from Standardization Documents Order Desk, DODSSP, Bldg. 4,Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1controls, piping, valves, conveying mechanisms,
16、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 4.6.4.2 Types:4.2.1 Type I-CW (clockwise) Rotation This machine shallbe designed and suppl
17、ied 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 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
18、(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 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
19、 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. The automaticprewash unit shall be fitted to, or be a part of the dishwashingmachine.4.5 Arrangement:4.5.1 Arrangement AWith tray rail
20、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 Arrangement CSame as Arrangement A, exceptdisposal unit not furnished; food discharged to garbage can atdisposal location.4.5.4 Arrangement DSam
21、e as Arrangement B, exceptdisposal unit not furnished; food discharged to garbage can atdisposal location.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 preferre
22、d 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 Type, style, class, and arrangement required (see 4.1),5.1.3 Noise level requirements, if other than specified (se
23、e11.2),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 requiredtemperature rise is more than 40F (22C) (see 7.14),5.1.6 Electrical power supply characteristics (current,voltage, p
24、hase, 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, such as end cowls withvent openings, or spare and maintenance parts as suggested bythe manufacturer.5.1.10 Treatment
25、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 Manufacturers certification, when required (see Sec-tion 13),5.1.13 Whether a flatware soak sink is required (see 7.16).6.
26、 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 the overall assembly. The dishwashing machines shallmeet the material design and construction requirements ofNSF/
27、ANSI 3.6.1.2 Corrosion-Resistant SteelCorrosion-resistant steelshall conform to the requirements of 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 applicatio
28、n.6.1.4 Nickel-Copper AlloyNickel-copper alloy shall con-form to the requirements of Specification 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 c
29、omplete 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 itsintended function. Dishwashers shall be quiet in operation, freefrom objectionable splashing of wate
30、r 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 accessible fromthe front and side of the machine. The machine shall washdishes by means of a water and de
31、tergent 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 rinse tankeither directly from the regular hot water supply with a handvalve or through the booster or so
32、lenoid, or both, provided thewater temperatures comply with the provisions of NSF/ANSI3. The dishwashing 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
33、 clutch or other device.F1237 152Means shall be provided for releasing or disconnecting thedrive power, or the drive in case of jamming. The conveyorshall be driven by a separate motor. The final rinse spraycontrol shall have a positive return to the OFF position whenthere are no racks in process to
34、 ensure the conservation of finalrinse water. The machine shall be provided with tracks ofcorrosion-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 o
35、f not less than 17.5 in. (444.5 mm)above the track.7.2 ConveyorThe conveyor shall be of heavy-dutyconstruction, and of suitable corrosion-resisting material. Itshall be designed to convey racks conforming to SpecificationF861 through the dishwasher automatically.7.2.1 Conveyor Clutch SystemAn automa
36、tic trouble freeclutch system, spring-loaded, 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 Conveyor Table(s)The conveyor table shall be con-structed of not less than 0.070 in. t
37、hick (1.78 mm) corrosion-resistant steel or other corrosion-resisting material. The legsshall be 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 a
38、t the rate of 6 to 8 ft/min (1.8 to2.4 m/min). The conveyor tables shall be furnished in thearrangement 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 m
39、aintenance. 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 shall be discharged not lower than 2 in. (50.8 mm)above the max
40、imum 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 connections. Drainage piping shall be corrosion-resisting mat
41、erial, 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 valves shall be ofcorrosion-resisting material designed for stea
42、m 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 marked to show open andclosed position and shall be lever-oper
43、ated 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, when used, shall beidentified.7.4 Spray AssembliesAll spray
44、 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 removable for deliming,descaling, and similar maintenance.7.5 TankTh
45、e tank shall be constructed of not less than0.048 in. (1.219 mm) thick corrosion-resistant steel, Type 302in accordance with Specification A240/A240M.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 re
46、movable 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 A240/A240M shall be providedto prevent insoluble matter and large pieces of food residuefrom passing into the tank. The ledges on which t
47、he scrap traysrest shall be so designed that surfaces beneath the ledge areeasily accessible 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 scrap trayopening.7.8 Access Door(s)Access door(s) sh
48、all 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 A240/A240M, and shallbe rigid and stiffened as necessary. Door safety catches shall beprovided for maximum operator saf
49、ety on sliding doors. Doorsshall be splash-proof and their exposed edges shall be smoothand formed to prevent canting 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
