1、ANSI Z21.57a-2012Addenda to the Tenth Edition ANSI Z21.57-2010Standard forRecreational Vehicle Cooking Gas AppliancesLegal Notice for StandardsCanadian Standards Association and CSA America, Inc. (operating as “CSA Group”) develop standards through a consensusstandards development process approved b
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19、SA Group, 8501 East Pleasant Valley Road, Cleveland, Ohio 44131.PrefaceThe standards set forth herein apply to the tenth edition of the Standard for Recreational Vehicle Cooking Gas Appliances, ANSI Z21.57-2010, and supersede corresponding standards therein. Following their preparation by the superv
20、ising Technical Advisory Group, they were accepted by the American National Standards Institute (ANSI) and subsequently approved.NOTE: Changes, other than editorial, are denoted by a vertical line in the margin.ApprovedSeptember 21, 2012American National Standards Institute, Inc.Standard DeveloperCS
21、A AMERICA INC.,Operating as “CSA Group”8501 East Pleasant Valley RoadCleveland, Ohio 44131Published - September 20121September 2012ANSI Z21.57a-2012 2012 CSA GroupPart I: Construction1.1 Scope1.1.8An exhaust hood incorporated in an appliance shall comply with the applicable provisions of the Safety
22、Standard for Electric Fans, ANSI/UL507. Ventilation systems with provisions to direct air in a downward direction (Air Curtain Ventilation System), although not supplied with the range or cooktop, are a part of the listing of the range or cooktop as outlined in Section 1.25.13 and Section 2.23, Perf
23、ormance of Appliances Intended to be Utilized With Ventilations Systems That Direct Air In a Downward Direction.1.25 Instructions1.25.12For gas cooking appliances that have been tested under Section 2.33, Performance of Appliances Intended to be Utilized With Ventilations Systems That Direct Air In
24、a Downward Direction, the manufacturer shall detail the brands and model numbers of those ventilation systems found acceptable.A warning statement shall be also made that using models or brands that direct air in a downward direction other than the ones specified may lead to improper operation of th
25、e gas appliance and may result in personal injury or property damage. Ventilating systems that direct the air upwards do not have any restriction.Instructions that if the model number ventilation hood is no longer available the owner should contact the range manufacturer for acceptable replacement v
26、entilation system model numbers.For ranges not tested under Section 2.23 and not intended for use in conjunction with a ventilation system with provisions to direct air in a downward direction, instructions shall include a statement that the appliance should not be installed with a ventilation syste
27、m that blows air downward toward the range. The instructions shall also include that this type of ventilation system may cause ignition and combustion problems with the gas cooking appliance resulting in personal injury or unintended operation.1.25.13A statement that an air curtain or other overhead
28、 range hood, which operates by blowing a downward airflow onto a range, shall not be used in conjunction with a gas range unless the hood and range have been designed, and tested in accordance with the Standard for Recreational Vehicle Cooling Gas Appliances, ANSI Z21.57 and listed by an independent
29、 testing laboratory for combination use. The installation instructions for both the gas range and air curtain range hood shall include statements that the air curtain or overhead range hood is permitted to be used in conjunction with a gas range, and the gas range and air curtain range hood have bee
30、n designed and tested in accordance with the Standard for Household Cooking Gas Appliances, ANSI Z21.1, and listed by an independent testing laboratory for combination use.1.26 Marking1.26.13A Class VI marking shall include the following information:A statement that an air curtain or other overhead
31、range hood, which operates by blowing a downward airflow onto a range, shall not be used in conjunction with a gas range unless the hood and range have been designed, tested and listed by an independent testing laboratory for combination use. The marking 2September 2012Standard for recreational 2012
32、 CSA Group vehicle cooking gas appliancesshould also direct the purchaser/installer to review the installation instructions to determine if their range is acceptable for use with such a ventilation system and what are the acceptable manufacturer(s) and model number(s) of such products.3September 201
33、2ANSI Z21.57a-2012 2012 CSA GroupPart II: Performance2.4 Combustion2.4.1An appliance shall not produce a concentration of carbon monoxide in excess of 0.04 percent in an air-free sample of the flue gases when the appliance is tested in a room having approximately a normal oxygen supply.During combus
34、tion tests of a built-in unit, all cracks or other openings (other than the designed air openings) shall be sealed. At the conclusion of the combustion tests, the sealing means shall be removed.For ranges or cook tops intended for use in conjunction with a ventilation system with provisions to direc
35、t air in a downward direction, combustion testing shall be performed on any enclosed compartment (oven or broiler), specialty top section burners which operate automatically such as thermostatically controlled griddles, open top broilers, or any other burner hidden from view of the operator. After t
36、he burners have been in operation for 5 minutes under Test Conditions 2 and 3 in Table I, Gas Pressure and Input Conditions for Use in the Various Performance Tests, samples of the flues gases shall be procured and analyzed for CO and CO2. During these tests no test pots shall be placed on the open
37、top burners and no 75 percent coverage plate shall be used over the open top broiler. Method of TestBurners shall be adjusted as specified by 2.3.5. Thermostats shall be set at their maximum open position after they have been adjusted as specified in 2.11, Thermostats.a. A flat bottom utensil 71/2in
38、 (191 mm) in diameter (bottom) as shown in Figure 7, Combustion Utensil, containing 5 lb (2.3 kg) ( 1 percent) at approximately room temperature shall be placed over each top burner. A suitably designed hood shall then be placed on the cooking top. Oven burners, broiler burners and any other gas-fir
39、ed and electrical cooking sections, capable of simultaneous operation, if incorporated into the appliance, shall be placed in operation simultaneously with the top burners and shall be operated during the time the samples of flue gases from the top burners are being secured. After the top burners ha
40、ve been in operation for 5 minutes under Test Conditions 2 and 3a or 3b in Table I, Gas Pressure and Input Rate Conditions for Use in the Various Performance Tests (see 2.3.4), samples of the flue gases shall be secured from the hood vent and analyzed for carbon monoxide and carbon dioxide.b. Two ad
41、jacent top burners shall be covered as symmetrically as possible with cast iron griddle plates 91/2in (241 mm) in diameter having he bottom recessed 3/16in (4.8 mm) with approximately a 1/8in wide (3.2 mm) lip. (See Figure 8, Griddle Plate Used In Combustion Test.) When a burner having an input rati
42、ng of 12,000 Btu/hr (3 517 W) or more is provided, it shall be one of those covered by the griddle plates. If there is less than a 91/2 in (241 mm) clearance between adjacent top burner centers, only one burner need be covered with a griddle plate. A 71/2in (191 mm) diameter (bottom) water filled ut
43、ensil (see 2.4.1-a and Figure 7, Combustion Utensil, shall be placed on each of the griddle plates and over each of the remaining top burners.c. When the construction of the utensil supports is such that they can be positioned so as to cause the burner flames to impinge on the utensil support bars,
44、the top burner tests shall be conducted with the utensil supports in that position.d. A griddle burner section shall be tested with the manufacturers griddle installed in accordance with the manufacturers instructions. The range top burner test utensil described in Figure 7, Combustion Utensil, cont
45、aining 5 lb (2.3 kg) ( 1 percent) shall be placed on the griddle. A suitably designed 4September 2012Standard for recreational 2012 CSA Group vehicle cooking gas applianceshood shall be placed over the griddle in such a manner as to collect all of the griddle burner(s) flue gases. Oven burners, broi
46、ler burners and any other gas-fired and electrical cooking sections capable of simultaneous operation, if incorporated in the appliance, shall be placed in operation simultaneously with the griddle burner and shall be operated during the time the samples are being secured. After the griddle burner h
47、as been in operation for 5 minutes under Test Conditions 2 and 3a or 3b in Table I, Gas Pressure and Input Rate Conditions for Use in the Various Performance Tests, samples of the flue gases shall be secured from the hood vent and analyzed for carbon monoxide and carbon dioxide. If a griddle section
48、 can be operated with or without the manufacturers griddle installed, testing shall be conducted under both conditions.e. An open top broiler section or unit shall be tested with 75 percent of the effective grid area covered with a flat sheet-metal plate. This plate shall be shaped and positioned so
49、 the uncovered area is a space of equal width around the perimeter of the broiler grid. During each test a suitably designed test hood of sufficient size to collect the flue gases shall be placed over the broiler section or unit. With the appliance operating under Test Conditions 2 and 3a or 3b in Table I, Gas Pressure and Input Rate Conditions for Use in Various Performance Tests and all burners in operation, samples of the flue gases shall be secured from the hood vent and analyzed for carbon monoxide and carbon dioxide after the burner(s) has been in operation for 5 minutes
