CSA 2.26:2017 pdf download.Decorative gas appliances for installation in solid-fuel burning fireplaces
4.6.1 Each appliance shall be equipped with an automatic gas ignition system (see Clause 3, Definitions). This system(s) shall be designed to function in one of the following manners.
a) Provide for ignition of main burner gas by means of proved pilot.
If the presence of the pilot is not proved, provide for automatic shutoff of pilot and main burner gas.
b) Provide for ignition of main burner gas using a direct ignition system, which only supervises the main burner(s) flame.
If the presence of the main burner flame is not proved, provide for automatic shutoff of main burner gas.
In the event of main burner flame outage during an operating cycle, provide for automatic shutoff of main burner gas without re-energizing the direct ignition device or provide for prompt and safe re-ignition of main burner gas by re-energizing the direct ignition device.
The application of this type of direct ignition system is limited to appliances having input ratings up to and including 400,000 Btu/hr (117 228 W) per combustion chamber under control of the ignition system.
c) Provide for ignition of main burner gas using a direct ignition system incorporating a proved igniter,which proves that the igniter is capable of ignition prior to initiation of main burner gas flow.For systems that supervise main burner flame during an operating cycle and de-energize the igniter, provide for automatic shutoff of main burner gas in the event of main burner flame outage.
4.6.2 lgnition and safety shutoff devices shall comply with the applicable construction provisions of:
a) the Standard for Automatic Gas lgnition Systems and Components, ANSI Z21.20, or the Standard for Combination Gas Controls for Gas Appliances, ANSI Z21.78●CSA 6.20; or the Standard for Manually Operated Electric Gas lgnition Systems and Components, ANSI Z21.92●CSA 6.29; and/or
b) the Standard for Automatic Gas lgnition Systems and Components, CAN1-6.4, for ignition and safety shutoff devices other than types utilizing low, extra low, or high voltages. Assemblies utilizing low, extra low, or high voltages, shall comply with the applicable provisions of Standard for Combustion Safety Controls and Solid-State lgniters for Gas and Oil-Burning Equipment, CSA C22.2 No.199.
4.6.4 In addition to the automatic gas ignition system functions specified in Clause 4.6.1a), a system having an interrupted ignition source shall provide for supervision of the main burner flame only following the main burner flame-establishing period. If the presence of the main burner flame is not proved within the flame-establishing period, the system shall provide for automatic shutoff of the gas supply to the pilot and main burner(s).CSA 2.26 pdf download.