CSA ANSI Z21.11.2:2016 pdf free download – Gas-fired room heaters, volume II, unvented room heaters
Combustible material — as pertaining to materials adjacent to or in contact with heat producing appliances, vent connectors, gas vents, chimneys, steam and hot water pipes, and warm air ducts, means materials made of or surfaced with wood, compressed paper, plant fibers, or other materials that are capable of being ignited and burned. Such material is considered combustible even though flame- proofed, fire-retardant treated, or plastered. Combustion — the rapid oxidation of fuel gases accompanied by the production of heat, or heat and light. Combustion chamber — the portion of an appliance within which combustion occurs. Combustion products — constituents resulting from the combustion of a fuel gas with the oxygen of the air, including the inerts, but excluding excess air. Condensate (condensation) — the liquid that separates from a gas (including flue gases) due to a reduction in temperature. Controls — devices designed to regulate the gas, air, water, or electrical supplies to a gas appliance. These may be manual, semi-automatic, or automatic. Cubic foot of gas — the amount of gas that would occupy 1 cubic foot when at a temperature of 60°F, if saturated with water vapor and under a pressure equivalent to that of 30 in Hg. Discharge air opening — any series of openings in the same plane separated by less than 1 inch of unbroken surface between openings through which heated air is discharged. For any opening through which ambient air is drawn in and discharged at a higher temperature through the same opening, the entire opening is deemed the discharge air opening.
Connection — a diagram that shows the connections of an installation or its component devices or parts. It may cover internal or external connections, or both, and contains such detail as is needed to make or trace connections that are involved. The Connection Diagram usually shows general physical arrangement of the component devices or parts. Schematic — a diagram that shows, by means of graphic symbols, the electrical connections and functions of a specific circuit arrangement. The Schematic Diagram facilitates tracing the circuit and its functions without regard to the actual physical size, shape, or location of the component devices or parts. Ladder form of schematic — a diagram drawn in the form of a vertical ladder. The outer vertical lines represent the electrical supply conductors. The horizontal steps represent each individual circuit with all component devices.
Spring type, limited adjustment — a regulator in which the regulating force acting upon the diaphragm is derived principally from a spring, the loading of which is adjustable over a range of not more than ± 15 percent of the outlet pressure at the midpoint of the adjustment range. Spring type, standard adjustment — a regulator in which the regulating force acting upon the diaphragm is derived principally from a spring, the loading of which is adjustable. The adjustment means are to be concealed. Convertible — a nonadjustable regulator for conversion between gases having different heating values whose converting mechanism can be changed from one predetermined outlet pressure setting for one gas to another predetermined outlet pressure setting for the other gas with no intermediate pressure settings and without addition, deletion, or substitution of parts. Multi-stage regulator — a regulator for use with a single gas whose adjustment means can be positioned manually or automatically to two or more predetermined outlet pressure settings. Each of these settings may be either adjustable or nonadjustable. The regulator may modulate outlet pressures automatically between its maximum and minimum predetermined outlet pressure settings.