### Addenda to American National Standard Z21.1-1974 Z21.1a-1974 for 

# HOUSEHOLD COOKING GAS APPLIANCES

Approved February 13, 1976 AMERICAN NATIONAL STANDARDS INSTITUTE, INC.



### Secretariat AMERICAN GAS ASSOCIATION Boulevard Arlington, Va. 22209

### The standards set forth herein to the twentieth edition of American National Standard for Household Cooking Gas Appliances, Z21. and Addenda thereto, and supersede corresponding standards therein

.

..

u .....,a
.. J:: 

### their preparation the supervisingsubcommittee, were accepted by American National Standards Committee Z21 

### and subsequently approved as American National Standard the American National Standards Inc.



# © American Gas Association**rei:)ldJlli~;b** 

### material hereinin

### laws or**Ordil!arICE~S** 

### or similardocuments

.."",

....""'

.. other 8501



### in U.S.A.

### Addenda to

I 

### CONSTRUCTION

1.23 ELECTRICAL EQUIPMENT AND WIRING 1.23.24 Adequate dielectric shaH beinterposed between ungrounded current-carrying parts and those external surfaces which can be contacted. Method of Test When connected to a supply circuit of rated voltage and frequency, the appliance shall be operated under Test Condition 1 in Table Xin accordance with the procedure specified in 2.22 or 2.26.7, whichever is applicable. At the conclusion of the operating period specified, and with continued application ofratedvoltage and frequency, leakage current between each of the supply terminals and all noncurrent-carrying metal parts (ungrounded) which might become

1 energized shall be measuredusingthe instrumentation as specified in American NationalStandardfor Leakage Current for Appliances, C10l.l-1973. The leakage current shall not exceed 0.5 milliampere. Immediately after measurement of the leakage current, the electrical circuit of the appliance shall be subjected to a GO-cycle alternating test in quadrature with the supply voltage applied between current-carrying parts and noncurrent-carrying metal parts which might become energized. Starting at not more than twice rated voltage, the test potential shall be increased to 900 rms volts and maintained at that value for a period of 1 minute. The arrangement of the test circuit shall be such that if the dielectric material breaks down a positive signal will be obtained, rather than depending upon a visual inspection of the material.

# ----------------

# ..........

2.5 COMBUSTION 

### 2.5.1 A household cooking appliance shaH not produce a concentration of carbon monoxide in excess of 0.01 percent in a room of 1,000 cubic feet content with 4 air changes occurring during the combustion of an amount of gas liberating 60,000 Btu.combustion tests of a unit, aU cracks or other openings (other than designed air openings) shaH be sealed. At the conclusion of the combustion tests, the sealing means shall be removed. Method of Test Burners shall be Thermostats shall be set at

""",

...,'VH after have been in 2.3.5.

for carbon monoxide shallbeon an airCarbon monoxide concentration in a cubic foot room shall be calculated the formula*;


### 60

where C concentration of CO inroom



### v

e '=

* This formula 

## %, CO in air-free of 

## %,

inches in diameter waterat !.no,,",,,'u over each

hood shall then and broiler burners sections, if

be in

burners and

be Simplified to read: Cr 0.0147 CaV. during the time the samples of flue gases from the top burners arebeing secured. Afterthetopburners have been in operation for 5 minutes under Test Conditions 2 and 3 in Table X, samples of the flue gases shall be secured from the hood vent and analyzed for carbon monoxide and carbon dioxide. b. An additional test under Test Condition 3 in Table X shall be conducted on top burners. During this test, other burners shall not be in operation. On units for use with natural, manufactured and mixed gases, or natural and mixed gases, this test need be conducted with test Gas Aonly. Two adjacent burners shall be covered with cast-iron 9-1/2 inches in diameter the recessed 3/16 inch with approxia 1/8-inch-wide a burner having an hour or more is covered the ameter on each

After the 5 minutes,

Additional tests shall be conducted deemed necessary with the other combinations any two u",.•**u.",-",~**

### c. When the that can be er flames to burner tests that d. An open top broiler unit shall be tested with the grid uncovered, and with the effective area covered with a sheet- metal panel. each test a suitably designed test hood of size to collect the products of combustion shall be placed on the cooking top. With the unit operating under Test Conditions 2 and 3 in Table X, 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.

e. An additional test shall be conducted on an broiler unit when under Test in Table X. On a for use with manufactured and mixed gases, or natural and mixed gases this test need be conducted with test Gas A top broiler unit shall be covered with a flat panel of a size that will cover the top to the outer edges of the of the unit. A suitably designed test hood of size to collect the ofcombustion shall be on the Afterthe burner has been in for , a of the flue gases shall be secured from the hood vent and analyzed for carbon monoxide and carbon dioxide. f. 

### An oven or enclosed broiler unit shall be operated for 5 minutes under Test Conditions 2and 3 in Table X, after which samples of the flue gases shall be secured from the flue outlet and analyzed for carbon monoxide and carbon dioxide. In the case of a unit having the top burner at a lower elevation than theovenandbroilerburners, such top burners shall be placed in operation simultaneously with the oven and broilerburners and shall be operated during the time the oven and broiler samples are being secured. the flue gases from two oven or broiler

assembled within the same are separate flues, they shall be

h. All sections of a floor-mounted unit flue collar and which does not a built-in or attached draft shall for 15 minutes under Table X with the flue collar

3 

### outlet blocked. On a uni1: 

### for use with manufactured and mixed ornaturaland gases this test need be conducted with test Gas A of the shall be secured from each section to vent the flue collar and carbon and carbon dioxide.

2.6 BURNER AND PILOT' OPERATING CHARACTERISTICS 

### 2.6.9 If 

### oven and broiler burners are incorporated as part of the appliance, their operation shaH not cause top burner flames to show objectionable lifting, floating, orblowing, orbeotherwise adversely affected. Method of Test This test shall be conducted under Test Conditions 1 2 and 3 in Table X. On an for use manufactured and gases, or natural and gase s, this test need be conducted with test Gas A The gas to oven burners and broiler burners shall be turned on and after which the gas to burners shallbeturnedon and and made ofthe topburnerflames. This test shall be conducted for a 15-minute without utensils placed over the burner. 2.6.11 Pilot and bypass flames of thermostatically controlled top burners shaH not be extinguished, or shall reignite in accordance with 2.6.15, after having been subjected to a wind with a velocity of 3 miles per hour directed from the front, sides and intermediate points at an angle 30 degrees down from the horizontal and also from the horizontal. Method of Test This test shall be conducted under Test Condition 1 in Table X. On a unit for use with natural, manufactured and mixed gases, or natural and mixed gases, this test need be conducted with test Gas A only.
rate on the burner shall be obtained as in 2.6.5. This test shall be conducted with the vessel in The wind delivers air diameter orifice platewith a to its outlet end. The before each test to miles per hour from a blower which of 5-incha sheet- metal orificefastened blower shall be adjusted a wind velocity of 3 a distance of 6 as

### four 6-inch a area foot square to the axis of the air stream orifice.

maintained. Determinations made at each**!.JU:~HjcVH** 

### shall be of 2 

### minutes duration. 2.6.12 

### fected the any of

### burners under Conditions 1, 2 and 3inTable X. 2.6.13 

### Burners shall without undue and 3 

### Table X.



### Method of 

### Test The burner**"''''''Ul'~** 

### for ",.uUUH;:a 

### in Table X. 15 minutes of rate to the burner shall be not exceed 500 

### Btu per hour. The burner shall then remain in and be to Test Condition 2 

### in X 

### for an 5-minute which a stable flame shall be maintained.

PILOT BURNERS AND SAFETY SHUTOFF DEVICES 

### 2.8.3 The time device to close off the 1 minutes when the Test 1 in Table shutoff Method of Test the burner controlled shall be

a. When an the Oven burner is controlled shutoff the oventhermo

### b.

c. stat of the be set at the thermostat dial. temat center oftheovenhas reached

measured an or and thermoaccording to themethod in 2.12, the thermostat shallbe this temperature. The burner shall then be operated for 1 

### hour and the test started.

be set to The burner for 15 minutes

oven and is controlled the the test conditions "b" above. the have shall be the device to to the controlled and time

shut off the gas noted.

2.19 EVALUATION OF CLOTHING IGNITION POTENTIAL 2.19.4 

### Oven The test outlined in ap]!'u..dU";""'" 

### with ovens. shaH be conducted on
The test outlined "b" 

### shall be conducted with ovens where the oven bottom is 36 

### or less above the floor 

### when accordance the instaUation structions. Method Test



### a. U'C'd'CIUI'l": 

### into Oven. lowestThe gas to the oven shall be the thermostat set to 400 F and the oven to with its door open for at least 10 minutes. 6-inch simulated of test half so there are no cut edges and used to grasp the oven rack the front within the fold. The oven rack shall be full out and then returned to normal of the test material shall occur. This test shall be with the simulated holder folded in half so as to form a 

### b. ;JL,un.;u."'fi Beside Open Oven Door. The oven racks shall be removed. Thegas to the oven shall be the thermostat set to 400 F and the oven to with its door open for at least 10 minutes. One corner of a 6-inch 6-inch simulated as described in 2. shall be to the of the of the open oven door closest to the oven 8). The free of the material be moved direction from the of attachment and to dwell at for 30 seconds. No of the test shall occur. 2.20 EVALUATION OF BURN HAZARD POTENTIAL OF EXTERIOR SURFACES 2.20.1 The contact ternDer:atlJu'e,s when its with the exterior surfaces of not exceed 131 F for surfaces feet or less above the floor and 149 F for surfaces 3 feet but not more than 5 above the floor,

be used, Method of Test

thermesthesiometer an instrument constructed accordance with National Bureau of Standards Technical Note Number 816: "Engineering and Construction Manual an Instrument to Make Burn Hazard Measurements COnSUmE"f Products." A commercial model may be purchased from Dynatech Thermatest 99 Erie Street, carrmncage, 02139.
5 When the ro.om T01m

.. ",,,,',, is other shall be F for each 5 orlessthan the allowablte increased or decreased F of room

shall be installedwith at least 1 foot above and 1 foot on either side of and with no side walls. Built-in appliances shallbeinstalled in an enclosure constructed in accordance with the manufacturer's installation instructions. Surfaces to be measured shall be 

### c leaned to remove surface dirt and oil before tests 

### a re begun. With the unit at room shall be turned on and be set to maintain an oven measured in accordance with scribed in 2. of400 ± 5 For, on continuous the if in excess of400 F, increased or decreased F of room F. The oven be closed. When 

### a unit more the test shall be conducted with Broilers shall not be conduct of these tests. Burn hazard shall be determinedon all exterior surfaces hour after the

Burn hazard for:
a. has first been or, atthe manufacturer's is

shall not be determined
surface of the section section burners and such asc. surfaces and d. flue faces than 5 feet above the

or

Burn shall be measured with the set for a 4-second probe contact time. Prior to each reading, the shall be cooled to stabilization temperature. The temperatures indicated by the thermes

- thesiometer shall not exceed the limits above. 9, deleted.) 10 becomes 2.20.2 the of above 131 F alternate method for of surfaces above the surface measurement and teltnUleratlue limits for suror less above floor as H.pp'l:!"

..... IULA E may be used. Method of Test section

2.4. 1 hour X. Burn hazard be determined with a burner shall shall be Test Conshall as described in 2.20.1. The maximum contact H>l'lnnIC'r ture on unbroken surface other than areas, above the burners not exceed 131 (55 C) on a room of 77 F. Where the room ture is other than 77 the allowable shall be increased or 1 each 5 F of room less than

TEMPERATURES OF KNOBS

on door valve hanand any other knobs <1"''''"'''7 normal COiokllng exceed those**spl~Clne'a** TABLE XII MAXIMUM HANDLE AND KNOB F*

Column A Column B Bare or metal 131 (55 C) 152 (66.7 C) 149 (65 C) 172 (77.8 C) 167 (75 C) 182 (83.3 C) Glass Wood or plastic**



## * Maximum allowable temperatures are based on

a 77 F (25 C) room temperature. When the room temperature is other than 77 the al-



## ** lowable temperatures for handles knobs shaH be increased or decreased 1 degree F for each degree F of room temperature greater or less than 77 F.

or with a metal not more thick and a

not less than 0.005 inchthICk.

Method of Test

as and means of No. 24 AWG ironin firm contact as with the handle or knob shall be measured on all handles and knobs that are and shall not exceed temin Column A ofTable XII. knob skirts inch or of knob shall not exceedthe

U<O'"UJl,",,", in Column B of Table XII. b. When handles and to be affected more knobs are located so as of section burners than additional test tion shall be made to oven burners, an section in

handle

sections shall be testedwith a 7- eachand burners shall be until the determined in reaches 400 F or the**1"""~r"H'~** the maximum of lower. This constant for the remainder of the 1-hour test The operating temperature of the griddle surface shall be increased or decreased 1 degree F for each F of room greater or less than 77 F. Temperatures of handles and knobs shall be determined as described in "a" above and shall not exceed the in Table XII. 2.22

2.22.1 The maximum of**eXI!)O~,eO** wall or counter surface aOlaC!erlt to a concealed waH or enclosure surface in COm:2ICI with or to and the burner box surface of a broiler unit that extends into the shall not be more than 117 F in excess of a room**~<t::!.un~l** ture of 70 F. The temperature on the beneath a floor-mounted unit shaH not be more than 90 F in excess of a room of 70 F. Method of Test



### a. Test Enclosures. The shall be installed in a "u,na."H,Y instrumented test structure ctIJIJU\-ctl"H;; type of as listed below: A floor-mounted unit not elevated oven or broiler shall in a partial test enclosure with its back and sides parallel to the walls of the enclosure, as shown in Figure 10, and with the spacing specifiedinFigure 1O. A floor-mounted unit of either the room heater or bungalow type shall beinstalled in the test enclosure with sidewall clearinches, as specified

and back wall clearinches a flue but not less than 6 from the of the unit. The back wall clearance unit fuels be as
Vertical walls of the enclosure shall be constructed ofeithernominal 1-inch

-thick wooden boards and finished in flat wall shall be 6 feet The lower side walls shall extend at 6 inches the oven door surface and be so that be even with the be equipped with increase their height to 6 be constructed of oak

2. A floor-mounted unit incorporating an elevated oven or broiler shallbeinstalled in an enclosure as shown in Figure 11. The back wall and the floor shall be as described in "1" above. The simulated cabinets shall be constructed of either nominal 1-inch-thick wooden boards or 3/4

-inch plywoodwith dimensions asindicated in Figure 11. All surfaces facing the appliance shall be finished in flat black. The unit shall be installed flush with rear wall and cabinet surfaces. to side walls and shall be as specified 3. A built-in top section, or combination thereof, be in an enclosure as described by 2.1.9 and shown in 4. 4. A built-in oven, enclosed broiler unit or combination ovenandenclosedbroilerunit shall be installed in an enclosure as desscribed in 2.1.10 and shown in 5. When an oven, broiler, or combination oven and broile

### r, is provided with a flue collar, a 4-foot-high listed Type B Gas Vent of the specified by the manufacturer (see .25.9) shall be attached to the flue collar. At the points where the vent pierces the panel directly above the top of the unit and the top panel of the enclosure, an opening shall be cut which will provide an annulus around the vent in accordance with its listing. The annuli thus formed shall be sealed on their top surfaces with asbestos paper (see Figure 12). A unit differing from the "I" "4" above the test structure most and modified as deemed agency. b. Instrumentation. Test enclosure**i'~,~,~~,~~** mined f.-.eans eter No. 24 copper-constantanExtensions above cooking top, adjustable sidewise in integral inches (clearance(s) specified by manufacturer)

Side walls extend 6 inches beyond oven door surface Installed with zero or I-inch clearance

# 1

(specified by manufacturer) Lower side walls aligned even with cooking top

Installed with zero* or 1/2 inch clearance**

* If zero side wall clearance specified, zero back wall clearance shall also be specified. 

## ** Spacing means to hold side wall away from side panel of unit not permitted.



### and

## - A--""'"

Dimensions



### Wall and Construction to simulate 13" deep wall cabinets 3D"



## o o

B 

## c---

as specified by 18"

84"

36"

Construction to simulate base cabinets extending 6 inches beyond oven door surface

manufacturer



### Test Enclosure for Elevated Sectionsc. shall be at intervals of 3 inches over the entire surfaces the back and side walls theinterior surfaces and on surfaces above the front of an elevated oven 

### a built-in oven or or a combination oven and broiler unit. bedded in the floor shall be 6 inches

floor-mounted the vertical intersects each the lower side walls. Each lower side wall shall also have two additional vertical rows of locatedat1-inch intervals both sides rowofthermointersected the vertical of the oven door surface. center line ofthe horizontal row of on each lower side wall shall be below the top.
An enclosure for a additional ter or wall on center lines the recess built-in unit shall have embedded in counat intervals of 2inches inch from the of the and in other enclosed surfaces the agency. For a vented or combination oven and as describedin2.22.1-aand 5, additional as previously described, shall be on the bottom of both combustible surfaces, centered inch away from the annuli around the (See 12.)
Determination.
of be

shall be de

### 2. 3.

4. On a built-in the on that extend into the cabinet determined as d. Electrical

e. Test Period.

whereThe <1Pll'H.:1,,,;t;: under tinued in ditions of and Table conditions Table XIII. ferent times are different sections, the sections shall be turned on in 

### a sequence that allows the various tests to be run and ended
shall be closed during the tests. test periods, and operin Table XIII, all**~**....**"u~.<UJ.'"**

shallbe and reambient room shall be

thermometers located as shown in recorded.
end of the test no enclosure or shall exceed 117 F or 90 above a room of

maximum wall, enclosure or burnerbox surface ture,Cabinet

### ~------------------------~ Cabinet

# ~ 30" Minimum

Dimensions A and



### Test

......""

.., Area

"All Both sides

manufacturer

taIled in as 

### shown for Unit.


### 14observed above 70 5 low 70 rise for surfaces and

PERFORMANCE OF UNITS PROVIDED WITH PYROLYTIC SELF-CLEANING OVEN OR SELF-CLEANING BROILER FEATURES 2.26.1

broiler features of carbon monoxide excess a room of cubic foot content witb ch::uu.es tbe combustion of

Method of Test

outlet carbon dioxide the manufacturer's

shall also be ob-**~<11lJ,UJl'"** ofoperaafter each contact ternpEer,atu faces of features shaH tbe unit Method of Test

,,"'lYUH'" pershall be determined on in 2.20. tbat temtaken on vertical surof the oven door and tbe surface. If surface is tbis surface is considered to extend inches above the of the oven

Ovens. of Provided

valve hanother knobsIVens, lVen. Z.26.11 become 2.26.7

### E

is informative and is not of the

The burn hazard may also be determined in test shown in E-1 and surface te!ffil:ler limits**"'V,.,"'jlU.'~** in Table E-I.
The in 

### 2.20.

E becomes AlJ'pemlllJ!: 2.20



### 14 TABLE E-I MAXIMUM 

### SURFACE F*

Bare or ICI<lIU"""U Porcelain ""

.., ....."". Glass



### **

or thick. 

### 152 

### 160 172 182 182 190 202 212

F room temis other are 

### tobeincreased F for each F of or less than77 F, with 

### a metal thick and not less thanCalibrationReferenceMarkScribedonShaft1/4TubingFerrule-PositionedtoobtainIbs.PressureatReference*Dimensionsshownabovearebasedonuseofthefollowingpurchasedparts:Marlin#1060Iron-ConstantanPlugMarlin111070TubeAdapter#C420-045-1000Spring(AssociatedSpringCorp.)**Thisdimensionwillvarysothat5lbs.calibrationwillalignwithreferencemarkonprobeshaft.7/32x.020CopperDisc.#24Ga.RubberInsulatedThermocoupleWire,TypeJIron-Constantan,SilverSolderedatOuterFaceofDisc11/16Die.x3/4Cork:ASTMP2l17PMed.GradeGasketCork11/160.0.x3/64Wallx5/8CopperCapCorkProtectorBrassWashersSilverSolderedtoTubing1/40.0.StainlessSteelTubing.420Dia•.045Wirex1.0Spring,EndsFlattenedandGround,SpringRate:20.72lbs./in.*3/80.0.AluminumTubingVoodFileHandle4-7/86-3/813-."..(Alldimensionsareininches.)Thermocouplewiresspaced1/16apartondisc,passedthroughtwoholesincork.E...1.T.n1l'W1ln£hl}'OfI'lItll1l1l"'.ftIandProbe