1、Performance Requirements for Commercial Dishwashing MachinesASSE InternationalASSE Standard #1004-2017ASSE Board Approved: March 2017ANSI Approved: January 2017An American National StandardCommercial Dishwashing Machines iASSE Standard #1004-2017ASSE InternationalMokena, IllinoisCopyright 2017, 2008
2、, 1990, 1967All rights reserved.Neither this standard, nor any portion thereof, may be reproduced without the written consent of ASSE International.No product may be said to be ASSE listed unless the manufacturer has applied to ASSE International, has had its product tested according to the applicab
3、le standards, and when the product has passed the test, displays the ASSE Seal on the product.Instructions for receiving the authorization to display the seal are available from the ASSE International office. Organizations wishing to adopt or list any ASSE International standard should print the ASS
4、E International standard number on the cover page first and in equal or larger type to that of the adopting or listing organization.General Informationii Commercial Dishwashing Machines ASSE Standard #1004-2017Commercial Dishwashing Machines iiiASSE Standard #1004-2017This foreword shall not be cons
5、idered part of this standard; however, it is offered to provide background information.This standard was first adopted by ASSE International in August 1967. The ASSE Product Standards Committee and several interested manufacturers developed the draft, which began in April 1966. Due to changes in com
6、mercial dishwashing machine technology, it was necessary for the standard to be updated.For the majority of commercial warewashing performance requirements, NSF/ANSI 3, Commercial Warewashing Equipment, covers those items. With regard to backflow requirements, NSF/ANSI 3 and the plumbing codes refer
7、ence this standard ASSE 1004.Although many of the material specifications are detailed within this standard, it is the responsibility of the manufacturer to comply with the requirements of the Safe Drinking Water Act, United States Public Law 93-523.Recognition is made of the time volunteered by mem
8、bers of the working group and of the support of manufacturers, who also participated in the meetings for this standard.This standard does not imply ASSEs endorsement of a product that conforms to these requirements.Compliance with this standard does not imply acceptance by any code body.It is recomm
9、ended that these devices be installed consistent with local codes by qualified and trained professionals.This standard was promulgated in accordance with procedures developed by the American National Standards Institute (ANSI).Forewordiv Commercial Dishwashing Machines ASSE Standard #1004-2017Edward
10、 J. Lyczko, ChairpersonCleveland Clinic Retiree Cleveland, OHWilliam Briggs, Jr.MGJ AssociatesNew York, NYTerry BurgerNSF InternationalYpsilanti, MIWilliam ChapinProfessional Code Consulting, LLCCullman, ALMark FishZurn Industries, LLCCary, NCRon GeorgePlumb-Tech Design b) An atmospheric type vacuum
11、 breaker complying with ASSE 1001;c) A hose connection vacuum breaker complying with ASSE 1011; d) A pressure vacuum breaker complying with ASSE 1020;e) A hose connection backflow preventer complying with ASSE 1052; orf) A spill-resistant vacuum breaker complying with ASSE 10561.2.2 Air Gap MinimumT
12、he minimum air gap shall be two (2) times the diameter of the supply orifice, or 1.0 inch (25.4 mm), whichever is larger.1.3 Location of Backflow Prevention Devices1.3.1 Air gaps shall be located on the outside of the machine, above the overflow rim, and shall be protected against suds, spray, splas
13、h, and/or flooding.1.3.2 Atmospheric-type vacuum breakers (ones that are not deck-mounted/equipment-mounted) shall be installed a minimum of 6.0 inches (150 mm) above the highest point of use. Deck-mounted or equipment-mounted atmospheric-type vacuum breakers shall be installed a minimum of 1.0 inch
14、es (25.4 mm) above the highest point of use. Atmospheric type vacuum breakers shall not be subjected to more than twelve (12) hours of continuous water pressure.The highest point of use is defined here as the location at which potable water first mixes with non-potable water, detergent, or other for
15、eign substances.1.3.3 Hose connection vacuum breakers shall be installed downstream of the last shut-off valve. Hose connection vacuum breakers shall not be subjected to more than twelve (12) hours of continuous water pressure. This device shall only be used on systems where the only source of low-h
16、ead backpressure comes from an elevated hose equal to or less than 10 feet (3.0 meters) in height.2 Commercial Dishwashing Machines ASSE Standard #1004-20171.3.4 Hose connection backflow preventers shall be installed downstream of the last shut-off valve. Hose connection vacuum breakers shall not be
17、 subjected to more than twelve (12) hours of continuous water pressure. This device shall only be used on systems where the low-head backpressure does not exceed that generated by an elevated hose equal to or less than 10 feet (3.0 m) in height.1.4 Water Supply PipingNo part of the water supply pipi
18、ng on the upstream side of the atmospheric type vacuum breaker shall be in direct contact with the liquid in the tank, or subject to spray or splash. Direct contact shall be prevented by means of a sheath, with not less than 1/16 inch (1.5 mm) clearance between the outer wall of the supply pipe and
19、the inside wall of the sheath. This clearance shall continue undiminished to the terminal opening of the sheath drain outlet to atmosphere.1.5 Reference DocumentsReference to all industry standards shall mean the editions stated here: ASME A112.1.2-2000, Air Gap Fittings for Use with Plumbing Fixtur
20、es, Appliances and Appurtenances. ASSE 1001-2017, Performance Requirements for Atmospheric Type Vacuum Breakers ASSE 1011-2016, Performance Requirements for Hose Connection Vacuum Breakers ASSE 1020-2004, Performance Requirements for Pressure Vacuum Breaker Assemblies ASSE 1052-2016, Performance Req
21、uirements for Hose Connection Backflow Preventers ASSE 1056-2013, Performance Requirements for Spill Resistant Vacuum Breakers NSF/ANSI 372, Drinking Water System Components Lead ContentCommercial Dishwashing Machines 3ASSE Standard #1004-2017Section II2.0 Test Specimens2.1 Samples Submitted for Tes
22、tThree (3) devices of each size and model shall be submitted by the manufacturer.2.2 Samples TestedThe testing agency shall select one (1) of each type or model and size for full test. Tests shall be performed in the order listed on one (1) device.2.3 DrawingsAssembly drawings, installation drawings
23、, and other data that is needed to enable a testing agency to determine compliance with this standard shall accompany devices submitted for examination and performance tests.2.4 RejectionFailure of one (1) device shall result in a rejection of that type or model and size.4 Commercial Dishwashing Mac
24、hines ASSE Standard #1004-2017Section III3.0 Performance Requirements and Compliance Testing3.1 Backsiphonage Test3.1.1 PurposeThe purpose of this test is to determine if any contaminated water is siphoned back into the potable water system when the form of backflow protection is an atmospheric type
25、 vacuum breaker, a hose connection vacuum breaker, or a hose connection backflow preventer that is integral to the commercial dishwashing machine.3.1.2 ProcedureConnect the commercial dishwashing machine water inlet(s) to a combination water supply and vacuum test header. Operate the dishwashing mac
26、hine through one complete cycle. Connect a sight glass in a vertical position to the discharge of the vacuum breaker, as illustrated in Figure 1. Fill the dishwashing machine with 180 F 5.0 F (82.2 C 2.8 C) water to its normal operating level. Foul the backflow preventer in accordance to the procedu
27、res within its specific standard: ASSE 1001, ASSE 1011, ASSE 1020, ASSE 1052, or ASSE 1056. Add 1 cup of suds making detergent, such as Dawn brand detergent or equivalent, per 20 gallons of water. The equipment shall be capable of developing a vacuum of at least 25.0 inches (635 mm) mercury column.
28、Tests shall be conducted in sequence. While the wash cycle is operating (wash pump operating), open the dishwashing machine supply valves and subject the dishwashing machine to a range of vacuum from 0 inches through 25.0 inches (0 mm through 635 mm), then 25.0 inches through 0 inches (635 mm throug
29、h 0 mm) of mercury as follows:a) Instantly apply a constant vacuum of at least 25.0 inches (635 mm) of mercury for a period of at least thirty (30) seconds. Remove the vacuum. Repeat a total of five (5) times.b) Apply intermittent vacuums of 2.0, 5.0, 10.0, 15.0, and 25.0 inches (51 mm, 130 mm, 254
30、mm, 381 mm, and 635 mm) of mercury. Each application shall be for five (5) seconds on and five (5) seconds off.c) Slowly apply a vacuum increasing at a uniform rate, from 0 to 25.0 inches (0 mm to 635 mm) of mercury. Then, slowly apply a vacuum decreasing at a uniform rate from 25.0 inches to 0 inch
31、es (635 mm to 0 mm) of mercury. Repeat total of five (5) times.NOTE: In all tests, vacuum levels are sea level values. Appropriate adjustments shall be made to account for changes in elevation. Subtract the quantity (altitude in feet/1000) in inches from the designed vacuums above to correct for alt
32、itudes above sea level. For instance, if the altitude above sea level is 700 feet, subtract (700/1000) = 0.7 inches from each of the vacuum measurements, i.e. 25.0 - 0.7 = 24.3 inches of mercury, etc. Multiply inches by 25.4 to convert to millimeters.Commercial Dishwashing Machines 5ASSE Standard #1
33、004-2017Figure 1 SupplyShut-offPressure gaugeAccumulatorVacuum pumpBackflow preventercritical level3.0in (76mm)6.0in (152mm) minimumMaximum suds orliquid rise levelTop side of the upperspray pipe, circuit, or tubeInletCommercial dishwashing machineBackflow preventerSight glass3.1.3 CriteriaA rise of
34、 suds, splash, spray or liquid above 3.0 inches (76 mm) from the bottom of the critical level of the backflow preventer shall result in a rejection of the dishwashing machine (see Figure 1).6 Commercial Dishwashing Machines ASSE Standard #1004-2017Section IV4.0 Detailed Requirements4.1 MaterialsSold
35、ers and fluxes containing lead in excess of 0.2% shall not be used in contact with potable water. Wetted surfaces of the device shall not contain a weighted average lead content in excess of 0.25% when evaluated in accordance with the test method specified in NSF/ANSI 372.4.2 MarkingsEach commercial
36、 dishwashing machine shall have the following information marked on it in a location visible after installation.a) Name of the manufacturer or trademark; andb) Type and model number of the dishwashing machine.The markings on the commercial dishwashing machine shall be either etched, cast, molded, st
37、amped or engraved on the body of the device, or on a corrosion resistant plate securely attached to the dishwashing machine with a corrosion resistant means.4.3 Installation InstructionsComplete instructions for installation shall be packaged with the dishwashing machine. 4.4 Maintenance Instruction
38、sComplete instructions shall be furnished for routine operator maintenance.Commercial Dishwashing Machines 7ASSE Standard #1004-2017Section V5.0 DefinitionsDefinitions not found in this section are located in the Plumbing Dictionary (Sixth Edition) published by ASSE International.ASSE International Chapter of IAPMO, LLC18927 Hickory Creek Drive, Suite 220 Mokena, Illinois 60448Phone: 708.995.3019 Fax: 708.479.6139 http:/www.asse-plumbing.org
