1、Designation: F 953 08Standard Specification forCommercial Dishwashing Machines (Stationary Rack, DumpType) Chemical Sanitizing1This standard is issued under the fixed designation F 953; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revisio
2、n, 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.1. Scope1.1 This specification covers manually fed, spray-type, sta-tionary rack, automatically controlled, dump ty
3、pe, chemicalsanitizing commercial dishwashing machines.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 for information onlyand are not considered standard.2. Referenced Documents2.1 AST
4、M Standards:2A 167 Specification for Stainless and Heat-ResistingChromium-Nickel Steel Plate, Sheet, and StripA 276 Specification for Stainless Steel Bars and ShapesA 554 Specification for Welded Stainless Steel MechanicalTubingA 582/A 582M Specification for Free-Machining StainlessSteel BarsB 127 S
5、pecification for Nickel-Copper Alloy (UNSN04400) Plate, Sheet, and StripF 760 Specification for Food Service Equipment ManualsF 1696 Test Method for Energy Performance of Single-Rack, Door-Type Commercial Dishwashing Machines2.2 OSHA Standard:3Title 29, Code of Federal Regulations (CFR), ChapterXVII
6、, Part 19102.3 NSF Standards:4NSF/ANSI 3 Commercial Warewashing EquipmentNSF/ANSI 29 Detergent and Chemical Feeders for Com-mercial Spray-Type Dishwashing MachinesNSF Listing Food Equipment2.4 UL Standards:5UL 921 Commercial DishwashersUL 969 Marking and Labeling Systems2.5 ASSE Standard:6Std. No. 1
7、004 Performance Requirements for BackflowPrevention Requirements for Commercial DishwashingMachines3. Terminology3.1 Definitions:3.1.1 commercial dishwashing machinesmachines thatuniformly wash, rinse, and sanitize eating and drinking uten-sils. The machines shall be capable of removing physical soi
8、land sanitizing multiple use eating and drinking utensils. Thedishwashing machines normally consist of the following prin-cipal parts: Legs, wash chamber hood, tank, doors, sprayassemblies, pumps, motors, controls, piping, valves, chemicalsanitizing equipment, and accessories.4. Classification4.1 Ty
9、pes, Styles, Classes, and GroupsDishwashing ma-chines shall be of the following types, styles, classes, size, andcapacity groups as specified:4.1.1 Type IStraight-through model, 34 in. nominal tableheight. This machine is used in line with table on each side.4.1.1.1 Style ASingle rack.4.1.1.2 Size a
10、nd Capacity, 19-34 by 19-34-in. (nominal)racks at minimum of 36 racks per hour.4.1.1.3 Style BDouble rack.4.1.1.4 Size and Capacity, 19-34 by 19-34-in. (nominal)racks at minimum of 72 racks per hour.4.1.2 Type IICorner model, 34 in. nominal table height.This machine is used in corner placement formi
11、ng a 90 tableon each side.4.1.2.1 Style ASingle rack.4.1.2.2 Size and Capacity, 19-34 by 19-34-in. (nominal)racks at minimum of 36 racks per hour.4.1.2.3 Style BDouble rack.1This specification is under the jurisdiction of ASTM Committee F26 on FoodService Equipment and is the direct responsibility o
12、f Subcommittee F26.01 onCleaning and Sanitation Equipment.Current edition approved Oct. 1, 2008. Published November 2008. Originallyapproved in 1985. Last previous edition approved in 2003 as F 953 94 (2003).2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Custome
13、r Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Available from Superintendent of Documents, Government Printing Office,Washington, DC 20402.4Available from NSF International, P.O. Box 130140, 789 N. D
14、ixboro Rd., AnnArbor, MI 48113-0140.5Available from Underwriters Laboratories (UL), Corporate Progress, 333Pfingsten Rd., Northbrook, IL 60062.6Available from ASSE International, 901 Canterbury, Suite A, Westlake, OH44145.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Consho
15、hocken, PA 19428-2959, United States.4.1.2.4 Size and Capacity, 19-34 by 19-34-in. (nominal)racks at minimum of 72 racks per hour.4.1.3 Type IIIUnder counter, front load. This machinemay be installed under counters.4.1.3.1 Style ASingle rack.4.1.3.2 Size and Capacity, 19-34 by 19-34-in. (nominal)rac
16、ks at minimum of 21 racks per hour.5. Ordering Data5.1 Purchasers should select the preferred options permittedherein and include the following information in the procure-ment document:5.1.1 Title, number, and date of this specification.5.1.2 Type I or II straight through, corner machine, or TypeIII
17、 under counter (see 4.1).5.1.3 Noise level requirements, if other than specified (see6.2).5.1.4 When a service-supply valve is required (see 9.3.3).5.1.5 Special electrical power supply characteristics.Specify current, voltage, phase, frequency (see 9.4). Standardelectrical characteristics are 115 V
18、, single phase, 60 Hz.5.1.6 When detergent feeder is required.5.1.7 When rinse agent feeder is required.5.1.8 When energy consumption profiles, water consump-tion profiles, or productivity profiles are desired (see 7.3).5.1.9 Manufacturers certification, when required (see Sec-tion 10).6. Performanc
19、e Requirements6.1 Performance Standards ComplianceDishwashingmachines shall conform to the requirements of OSHATitle 29,UL 921, and NSF/ANSI 3, and the detergent, rinse agent, andsanitizer feeders shall comply with NSF/ANSI 29.6.2 Noise LevelUnless otherwise specified, the noise levelof the dishwash
20、er, when operating, exclusive of loading,unloading, and servicing, shall not exceed 80 dBa at loadingand unloading stations, measured at 5 ft above floor level, and2 ft from the machine.6.3 Performance TestingWhen specified in the contract orpurchase order, performance testing shall be performed ina
21、ccordance with Test Method F 1696.7. Test Methods7.1 OperationalEach machine shall be thoroughly testedin accordance with the manufacturers instructions to deter-mine compliance with the requirements of NSF/ANSI 3 andUL 921.7.2 External LeakageNo leakage shall occur when testedat pressures up to 125
22、 % of the manufacturers recommendedsupply line pressure.7.3 Performance ProfilesSee Test Method F 1696.8. Quality Assurance8.1 Unless otherwise specified in the contract or purchaseorder, the manufacturer is responsible for the performance ofall requirements as specified herein. Except as otherwises
23、pecified in the contract or order, the manufacturer may use hisown or any other facilities suitable for the testing of themachine requirements specified herein.9. Physical Requirements9.1 MaterialsAll materials shall be specified herein.Whenever specific materials are referenced, it is understoodtha
24、t the use of materials and material thickness demonstrated tobe equally satisfactory for their intended purpose are accept-able. Materials used shall be free from defects that wouldadversely affect the performance or maintainability of indi-vidual components of the overall assembly. The dishwashingm
25、achines shall meet the material requirements of NSF/ANSI 3.9.1.1 Corrosion-Resistant SteelCorrosion-resistant steelshall conform to requirements of any 300 series stainless steelsspecified in 2.1.9.1.2 Corrosion-Resisting MaterialCorrosion-resistingmaterial is other than corrosion-resistant steel th
26、at is equivalentin the dishwasher application.9.1.3 Nickel-Copper AlloyNickel-copper alloys shall con-form to the requirements of Specifications B 127, A 582/A 582M, A 554, A 276, and A 167.9.2 ConstructionThe dishwasher shall conform to thedesign and construction requirements of NSF/ANSI 3. Thedish
27、washing machine shall be complete so that when con-nected to the specified source of power, water supply, drain anddetergent, sanitizer, and rinse agent feeders, as applicable, theunit can be used for its intended function. Dishwashers shall berigid, quiet in operation, free from objectionable vibra
28、tion, andso constructed as to prevent objectionable splashing of water oroverflow of water to the outside of the machine. Parts requiringadjustment or service, or both, shall be readily accessible. Themachine shall wash dishes by means of a water and detergentsolution pumped from the tank, and shall
29、 rinse the dishes witha pumped, recirculated fresh water sanitizer solution. Provi-sions shall be made to automatically fill the tank directly fromthe regular hot water supply. The wash, dwell, and sanitizingrinse cycles shall be automatically controlled. A light shall beprovided to indicate when th
30、e machine is in operation. Ma-chines shall be provided with tracks of corrosion-resistant steelor other corrosion-resisting material not less than 14 gage(0.070 in. (1.78 mm). Dishwashers shall have an insideworking height, including the door height, of not less than 16in. (406.4 mm) above the track
31、.9.3 Operation CycleAt the beginning of the wash cycle, adetergent dispenser shall be activated to supply a measuredamount of detergent into the tank. The machine will automati-cally start the wash cycle, after which, the drain automaticallyopens to “dump” the wash water to a holding tank or to a dr
32、ain.Before the drain closes, the water fill solenoid is actuated,creating a flush cycle, after which the drain closes.At this time,water, rinse additive, if applicable, and sanitizing solution aresupplied to the tank. The machine automatically completes therinse cycle and then shuts down. The rinse
33、tank fill thenbecomes the water for the next wash cycle or automatically fillsthe machine with water at the start of the next cycle.9.3.1 Piping, Tubing, Fittings, and Valves (Installation)Connections shall be readily accessible to facilitate installationand maintenance. Piping, tubing, and valves s
34、hall be located,whenever possible, on the exterior of the machine.9.3.2 Piping and FittingsWater piping and fittings shallbe of corrosion-resisting material. Fresh water supply to theF953082tank shall be discharged not lower than 2 in. (50.8 mm) abovethe maximum flood level rim, or an effective air
35、gap or vacuumbreaker shall be installed to prevent backflow. Backflowprevention shall be in accordance with ASSE Standard No.1004. The drain and other plumbing connections shall bestandard pipe or tubing connections. Drainage piping shall becorrosion-resisting material, or suitable heat-resisting pl
36、asticmaterial. Drains may be joined into a single trunk linerequiring only one connection or arranged to permit individualconnections to the waste line.9.3.3 ValvesWhen specified, a separately packed, hotwater service supply valve shall be provided for closing thesupply of water to the dishwasher. F
37、resh water fill valve shallbe reliable and fully automatic and suitable for 160F (70C)water. The drain or dump valve shall be automatically oper-ated.9.3.4 Spray AssembliesAll spray nozzles and spray armmanifolds shall be of corrosion-resisting materials. All sprayassemblies shall be removable witho
38、ut the use of tools andshall be easy to clean.9.3.5 TankThe tank and chamber shall be constructed of acorrosion-resistant or corrosion-resisting material and shallhave a rigidity equal to, or better than, 0.055-in. (1.4-mm)steel.9.3.6 OverflowThe dishwashers shall have a readily ac-cessible and clea
39、nable overflow or suitable drain in the tank.9.3.7 Access Door(s)Door and door frames shall beconstructed of a corrosion resistant or corrosion-resistingmaterial and shall have a rigidity equal to or better than0.043-in. (1.09-mm) steel. Loading and unloading door(s) shallbe counterbalanced and, whe
40、n in the open position, shallelectrically interlock the machine so that it cannot operate.Opening the door during operation shall automatically stop themachine. A means shall be provided to hold the door(s) openthat are not counterbalanced. Door(s) shall be splashproof andtheir exposed edges shall b
41、e smooth and formed to preventcanting or warping.9.3.8 Legs (Feet)The machines shall be rigidly con-structed and have legs (feet) made of corrosion-resistant steel,or other corrosion-resisting material. Type I and II dishwasherfeet shall be adjustable so that the height of the track may bevaried fro
42、m 34 in. (863.6 mm) to 35 in. (889 mm) above thefloor. Feet of Type III machine shall be adjustable so the top ofthe dishwasher may be varied from 34 in. (863.6 mm) to 35 in.(889 mm) above the floor.9.3.9 Pump and Motor Assemblies:9.3.9.1 AssembliesThe pump motor shall be mounted onthe tank or on a
43、rigid steel base. Rotary seals shall be providedfor pump shafts and shall be removable for servicing.9.3.9.2 PumpPump casings shall be cast iron orcorrosion-resisting material and shall have a removable coveror inspection plate, or be of such a design as to permit ease ofaccessibility for inspection
44、 and removal of foreign items fromthe impeller and interior. The pump shall either be self-drainingor equipped with means for draining. The shaft shall be ofcorrosion-resistant steel, properly aligned and supported. Theimpeller shall be corrosion-resisting material or gray iron alloyand shall be in
45、dynamic balance. The motor and pump shallhave at least two ball or roller bearings. The pump suctionintake shall be provided with a corrosion-resistant strainer orshroud.9.3.9.3 Detergent FeederWhen specified, an electric au-tomatic detergent feeder, conforming to NSF/ANSI 29, shall beseparately pac
46、ked with the dishwasher. The reservoir of thefeeder shall be capable of holding a supply of dishwashingdetergent adequate in normal dishwashing operation for a onemeal period.9.3.9.4 Rinse Agent FeederWhen specified, a separatelypacked rinse agent feeder, conforming to requirements ofNSF/ANSI 29, sh
47、all be supplied with the dishwasher.9.3.9.5 Sanitizing Agent FeederAn automatic sanitizerfeeder shall be supplied with the machine and conform withNSF/ANSI 29.9.4 Electrical EquipmentThe electrical equipment shallmeet the requirements of UL 921. The dishwasher shall operateon the power characteristi
48、cs (current, voltage, phase, fre-quency) specified.9.4.1 MotorsMotors shall comply with applicable re-quirements of UL 921. The horsepower ratings of the motorsshall be adequate to meet the pump requirements of NSF/ANSI3.9.4.2 ControlsAll control equipment shall conform toUL 921 and be capable of op
49、eration in an ambient temperatureof 115 6 9F (46 6 5C) min.9.4.3 Wiring and Circuit Safety Devices All wiring andcircuit safety devices shall be in conformance with UL 921.Allwiring of the dishwashing machine components shall providefor a single connection at a recognized junction on themachine.9.5 LubricationMeans for effective and adequate lubrica-tion shall be provided when required. Lubricating points shallbe readily accessible and the dishwasher shall be lubricatedwith the proper amount of lubricant prior to delivery.9.6
