1、Designation: F1920 15 An American National StandardStandard Test Method forPerformance of Rack Conveyor Commercial DishwashingMachines1This standard is issued under the fixed designation F1920; the number immediately following the designation indicates the year oforiginal adoption or, in the case of
2、 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.1. Scope1.1 This test method evaluates the energy and water con-sumption of rack conveyor, commercial dishw
3、ashingmachines, hereafter referred to as dishwashers. Dishwashersmay have remote or self-contained booster heater. This proce-dure does not address cleaning or sanitizing performance.1.2 This test method is applicable to both hot water sanitiz-ing and chemical sanitizing rack conveyor machines, whic
4、hinclude both single tank and multiple tank machines. Racklessconveyors (i.e. flight type machines) are included. Dishwashertank heaters are evaluated separately from the booster heater.Machines designed to be interchangeable in the field from hightemp and low temp (i.e. Dual Sanitizing Machines) an
5、d viceversa, shall be tested at both settings. Machines should be setfor factory settings. If a dishwasher includes a prewash tankheater as an option, energy should be submetered separately forthe prewash tank heater. This test method may be used fordishwashers with steam coil tank or booster heat,
6、but notdishwashers with steam injection tank or booster heat. Whenthe test method specifies to use the data plate or manufacturersrecommendations, instructions, specifications, or requirements,the information source shall be used in the following order ofpreference and documented in the test report:
7、 data plate, usermanual, communication with manufacturer.1.3 The following procedures are included in this testmethod:1.3.1 Procedures to Confirm Dishwasher is OperatingProperly Prior to Performance Testing:1.3.1.1 Maximum energy input rate of the tank heaters(10.5).1.3.1.2 Maximum energy input rate
8、 of the booster heater, ifapplicable (10.6).1.3.1.3 Final sanitizing rinse water consumption calibration(10.7).1.3.1.4 Booster temperature calibration, if applicable (10.2).1.3.1.5 Wash tank temperature calibration (10.3).1.3.1.6 Wash tank pump and conveyor motor calibration(10.4).1.3.2 Energy Usage
9、 and Cycle Rate Performance Tests:1.3.2.1 Washing energy performance test (10.8).1.3.2.2 Tank heater idle energy rate (10.9).1.3.2.3 Booster idle energy rate, if provided (10.10).1.4 The values stated in inch-pound units are to be regardedas standard. The values given in parentheses are mathematical
10、conversions to SI units that are provided for information onlyand are not considered standard.1.5 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health pra
11、ctices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2D3588 Practice for Calculating Heat Value, CompressibilityFactor, and Relative Density of Gaseous FuelsF858 Specification for Hot Water Sanitizing CommercialDishwashing Machines,
12、 Single Tank, Conveyor RackTypeF861 Specification for Commercial Dishwashing Racks2.2 NSF Standards:NSF/ANSI 3 Commercial Warewashing Equipment3NSF/ANSI 170 Glossary of Foodservice Terms32.3 ASHRAE Standard:ASHRAE Guideline 21986 (RA90) Engineering Analysisof Experimental Data43. Terminology3.1 Defi
13、nitions of Terms Specific to This Standard:1This test method is under the jurisdiction of ASTM Committee F26 on FoodService Equipment and is the direct responsibility of Subcommittee F26.06 onProductivity and Energy Protocol.Current edition approved Aug. 1, 2015. Published October 2015. Originallyap
14、proved in 1998. Last previous edition approved in 2011 as F1920 11. DOI:10.1520/F1920-15.2For 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 Summ
15、ary page onthe ASTM website.3Available from NSF International, P.O. Box 130140, 789 N. Dixboro Rd., AnnArbor, MI 48113-0140, http:/www.nsf.org.4Available from American Society of Heating, Refrigerating, and Air-Conditioning Engineers, Inc. (ASHRAE), 1791 Tullie Circle, NE, Atlanta, GA30329, http:/ww
16、w.ashrae.org.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States13.1.1 ambient temperature, ndefined in NSF/ANSI 170-2014; Section 3.3.3.1.2 auxiliary rinse, ndefined in NSF/ANSI 170-2014;Section 3.5.3.1.3 average tank temperature, ntempe
17、rature of the washtank measured within12 in. of the factory installed thermostatbulb. The temperature is measured and averaged during the 25rack (50 racks for flight type) loaded room temperaturewashing test. The time interval for averaging includes washing,rinsing, dwell, energy recovery (for heat
18、recoverydishwashers), wash tank temperature recovery and loading.The temperature averaged over the entire period starting withthe first loaded dish rack and ending when both wash tank andbooster elements cycled off after the last load is washed.Stabilization loads should not be included in the avera
19、ge washtank temperature.3.1.4 batch, na group of five dishloads as described in3.1.10.3.1.4.1 DiscussionThe dishracks are grouped into batchesto better simulate typical in-kitchen operation and facilitateconsistent application of the washing energy use test.3.1.5 booster heater, nwater heater for ta
20、king supply hotwater (typically 140F) up to 180F+ for sanitizing rinse; thebooster heater may be separate from dishwasher or integral.Booster Heater is defined in NSF/ANSI 170-2014; Section3.224.1.3.1.6 chemical sanitizing (low temp) machine, na machinethat applies a chemical sanitizing solution to
21、the surfaces ofdishes to achieve sanitization.3.1.7 chemical sanitizing rinse, ndefined in NSF/ANSI170-2010; Section 3.170.3.1.8 conveyor machine, na dishwashing machine thatemploys a conveyor or similar mechanism to carry dishesthrough a series of wash and rinse sprays within the machine.3.1.9 cycl
22、e rate, nmaximum production rate of a dish-washer when washing dishloads in accordance with the CycleRate Performance test.3.1.10 dishload, npeg-type, polypropylene dishrack of aspecified weight, loaded with ten 9-in. plates of a specifiedweight, used to put a thermal load on the dishwasher during t
23、hewashing energy test.3.1.11 dishwasher, nfor this test method, a machine thatuniformly washes, rinses, and sanitizes eating and drinkingutensils and cookware.3.1.12 dual sanitizing machine, na machine designed tooperate as either a Chemical Sanitizing or Hot Water Sanitizingmachine.3.1.13 empty dis
24、h rack, ndish rack without any dishwareplaced in the dish rack.3.1.14 energy saver mode, noperational setting that isdesigned to reduce energy during idle mode through temporaryshut-down of certain machine components (pumps or beltmotors) or reduction of certain temperature set points.3.1.15 factory
25、 settings, na setting that has been pro-grammed or adjusted at the factory and is representative of theway that model is set up initially. These settings are the defaultsettings for the machine and may or may not be user adjustable.3.1.16 flight type conveyor, na conveyor machine wherethe dishes are
26、 loaded directly on the conveyor rather thantransported within a rack. This machine is also referred to as arackless conveyor.3.1.17 flow pressure, ndefined in NSF/ANSI 170-2014;Section 3.76.3.1.18 fresh water, ndefined in NSF/ANSI 170-2014;Section 3.85.3.1.19 hot water sanitizing (high temp) machin
27、e, namachine that applies hot water to the surfaces of dishes toachieve sanitization.3.1.20 hot water sanitizing rinse, ndefined in NSF/ANSI170-2010; Section 3.171.3.1.21 idle mode, nfor all dishwasher types, the dish-washer is in idle mode when it is not actively running but isstill powered on and
28、ready to wash dishes while maintainingthe tank or tanks at the required temperature.3.1.22 line pressure, ndefined in NSF/ANSI 170-2014;Section 3.115.3.1.23 multiple tank conveyor, na conveyor type machinethat includes one or more tanks for wash water and one or moretanks for pumped rinse water, fol
29、lowed by a sanitizing rinse.This type of machine may include a pre-washing section beforethe washing section and an auxiliary rinse section, for purposesof reusing the sanitizing rinse water, between the power rinseand sanitizing rinse section. Multiple tank conveyor dishwash-ers can be either chemi
30、cal or hot water sanitizing, with aninternal or external booster heater for the latter.3.1.24 non-recirculating pumped sanitizing rinse,ndefined in NSF/ANSI 170-2014; Section 3.131.3.1.25 post-sanitizing rinse, ndefined in NSF/ANSI 170-2014; Section 3.174.3.1.26 prewashing unit, ndefined in NSF/ANSI
31、 170-2014;Section 3.150.3.1.27 pumped rinse, ndefined in NSF/ANSI 170-2014;Section 3.154.3.1.28 rack, ndefined in NSF/ANSI 170-2014; Section3.157.3.1.29 rated temperature, ndishwashers rated data plateminimum operating tank temperature as determined by NSF/ANSI 3.3.1.30 recirculating sanitizing rins
32、e, ndefined in NSF/ANSI 170-2014; Section 3.162.3.1.31 recovery time, ntime from the end of washing adishload to until the wash tank heaters have cycled off.3.1.32 sanitization, ndefined in NSF/ANSI 170-2014;Section 3.178.3.1.33 sanitizing rinse, ndefined in NSF/ANSI 170-2010;Section 3.173.3.1.34 sa
33、nitizing solution, ndefined in NSF/ANSI 170-2014; Section 3.179.F1920 1523.1.35 single tank conveyor, na conveyor machine thatincludes a tank for wash water followed by a sanitizing rinse(pumped or fresh water). This type of machine does not havea pumped rinse tank. This type of machine may include
34、aprewashing section ahead of the washing section and anauxiliary rinse section, for purposes of reusing the sanitizingrinse water, between the wash and sanitizing rinse sections.Single tank conveyor dishwashers can be either chemical or hotwater sanitizing, with an internal or external booster heate
35、r forthe latter.3.1.36 tank heater idle energy rate, nrate of energyconsumed by the dishwasher while “holding” or maintainingthe wash tank water at the thermostat(s) set point during thetime period specified.3.1.37 uncertainty, nmeasure of systematic and precisionerrors in specified instrumentation
36、or measure of repeatabilityof a reported test result.3.1.38 user adjustable, na setting that can be adjusted bythe operator without tools and can be adjusted without removalof panels. These settings cannot be accessed through passwordprotected service menus that are described in the servicemanual. T
37、hese settings can be accessed through menus withoutpasswords and are described in user manuals. Password pro-tection that allows the manager to access the settings isconsidered user adjustable. Button combinations not describedin the user manual are considered passwords.3.1.39 washing, ndefined in N
38、SF/ANSI 170-2014; Sec-tion 3.222.3.1.40 water heater, ndefined in NSF International/American National Standards Institute (NSF/ANSI) 170-2014:Glossary of Food Equipment Terminology; Section 3.224.4. Summary of Test Method4.1 The booster temperature (for high temperature ma-chines) is calibrated and
39、verified.4.2 The maximum energy input rate of the tank heater andthe booster heater, if applicable, is measured to confirm that thedishwasher is operating at the manufacturers rated input. If themeasured input rate is not within 5 % of the rated input or therating printed on the heating element, all
40、 further testing ceases.NOTE 1It is the intent of the testing procedure herein to evaluate theperformance of a dishwasher at its rated gas pressure or electric voltage.If an electrical unit is rated dual voltage, that is, designed to operate ateither 208 or 240 volts (V) with no change in component,
41、 the voltageselected by the manufacturer or the tester, or both, shall be reported. If adishwasher is designed to operate at two voltages without a change in theresistance of the heating elements, the performance of the unit, forexample, cycle rate, may differ at the two voltages. Therefore the test
42、smay be performed at both voltages and the results reported accordingly.4.3 Water consumption is adjusted in accordance withmanufacturers rated water consumption per NSF/ANSI 3.Report the measured consumption and confirm that it is within5 % of the listing on the data plate. If the difference is gre
43、aterthan 5 %, terminate testing and contact the manufacturer. Themanufacturer may make appropriate changes or adjustments tothe dishwasher or provide another unit for testing.4.4 The tank heater energy rate is determined at idle, that is,when the tank temperature is being maintained, but no washingi
44、s taking place.4.5 Booster heater idle energy rate is determined.4.6 Dishwasher and booster energy consumption per rack ofdishes is determined during a heavy-use scenario by washingracks loaded with a specified quantity of dishes4.7 Water consumption is monitored during testing to deter-mine the rat
45、e of water usage.5. Significance and Use5.1 The maximum energy input rate test is used to confirmthat the dishwasher is operating at the manufacturers ratedinput prior to further testing. This test method also will indicateany problems with the electric power supply, gas servicepressure, or steam su
46、pply flow or pressure.5.2 Tank and booster temperatures, as well as waterconsumption, are adjusted to NSF specifications to insure thatthe test is applied to a properly functioning dishwasher.5.3 Because much of a dishwashers operating period isspent in the idle condition, tank heater and booster id
47、le energyconsumption rate(s) are important parts of predicting dish-washers energy consumption.5.4 The washing energy performance test determines energyusage per rack. This is useful both as a measure for comparingthe energy performance of one dishwasher to another and as apredictor of the dishwashe
48、rs energy consumption.5.5 Water-consumption characterization is useful for esti-mating water and sewage costs associated with dishwashingmachine operation.6. ApparatusNOTE 2For all instruments, the specifications may be better thanspecified. Values provided are intended to be the minimum or maximum(
49、depending on which is the worst case for the parameter) allowable.6.1 1 or 2 watt-hour (Wh) Meters, for measuring theelectrical energy consumption of the tank heaters, pump motor,and booster heater, if applicable, shall have a resolution of atleast 10 Wh and a maximum accuracy no greater than 1.5 % ofthe measured value for any demand greater than 100 watts (W).For any demand less than 100 W, the meter shall have aresolution of at least 10 Wh and a maximum accuracy nogreater than 10 % of the measured value.6.2 1 or 2 Gas Meters
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