This Standard applies to the construction and installation procedures for newly produced automatic intermittent pilot ignition systems (see Part II, Definitions), hereinafter referred to as systems, constructed entirely of new, unused parts and materials and designed to be adapted to existing continuous pilot burners on listed forced air heating appliances and boilers equipped with atmospheric burners.
This Standard does not apply to a system for use on appliances equipped with power burners or to direct vent appliances.
Systems covered by this standard shall be comprised of at least:
a) Pilot igniter(s) and cable(s);
b) Pilot flame sensor(s);
c) Associated system control;
d) Two automatic valves in series, controlling main burner gas;
e) Associated system wiring; and
f) Pressure regulator(s).
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ANSI Z21.71a-2005 (R2016) - Addenda 1 to ANSI Z21.71-1993, Automatic Intermittent Pilot Ignition Systems for Field Installation