CSA 2.26:2012 pdf download.Standard for Decorative gas appliances for installation in solid-fuel burning fireplaces
2.1.3 When a thermocouple is specified for the measurement of air, flue or vent gas temperatures, a thermocouple or an equivalent temperature measuring device complying with the Performance Test Code .Temperature Measurement, ANSI/ASME PTC 19.3, Supplement on Instruments and Apparatus, Part 3, shall be used.
2.1.4 Decorative appliances for installation in solid-fuel burning fireplaces are designed for installation only in a solid-fuel burning fireplace. Their designs may take many forms, so for their testing, principles must be established for the guidance of the testing agency which will assure compliance with basic standards for safe operation and acceptable performance, without restricting their design to preconceived forms. With this in mind, the principles stated within Part II are to be used by the testing agency in determining the acceptability of decorative appliances for installation in solid-fuel burning fireplaces.
2.1.5 Gas appliance pressure regulator vent limiters shall be in place during all performance tests.
2.1.6 Room temperature, when specified, shall be determined by means of four 24 AWG (0.20 mm2)iron-constantan bead-type thermocouples, the junctions of which are shielded from radiation. These thermocouple junctions shall be located so room air temperature can be measured at points approximately 24 in (610 mm) away from the approximate midpoints of each of the four sides of the appliance or test enclosure. The thermocouple leads shall be connected to a recording potentiometer, and room temperature shall be the average of the four individual temperature readings.
2.2 Test Gases
In conducting the performance tests specified herein, gases with characteristics approximately as shown in Table V, Characteristics of Test Gas, shall be used.
a. An appliance for use with natural gas shall have the tests specified herein conducted with test Gas A.Additional tests shall be conducted with test Gas G at normal inlet test pressure with no change whatsoever in the natural gas adjustments, and shall comprise those tests specified in 2.5.1, 2.5.2, 2.5.3, 2.6.1, 2.9.2 and 2.9.4. Under conditions of these tests, yellow-tipped flames are considered acceptable. Resonance encountered during conduct of burner operating characteristics tests with test Gas G is not to be considered cause for rejection. Compliance with these supplemental tests does not imply the appliance has been examined under this standard for use with butane-air mixtures.
b. An appliance for use with propane shall have the tests specified herein conducted with test Gas E. The tests specified in 2.5, Burner Operating Characteristics, 2.6, Pilot Operating Characteristics, 2.8.2 and 2.8.8 shall also be conducted with test Gas D with no change whatever in burner equipment.
C. When use with more than one type of gas is desired, the tests specified in 2.1 1, Appliance Main Gas Valves, through 2.15, Handle Temperatures, need be conducted with only one test gas provided there are no changes in the appliance or input rating for different gases which, in the opinion of the testing agency, would affect the results of these tests.CSA 2.26 pdf download.