CSA ANSI Z21.76:2016 pdf free download – Gas-fired unvented catalytic room heaters for use with propane gas
Intermittent — an ignition source that is automatically ignited or energized when an appliance is called on to operate and that remains continuously ignited or energized during each period of main burner operation. The ignition source is automatically extinguished or de-energized when each main burner operating cycle is completed. Interrupted — an ignition source that is automatically ignited or energized when an appliance is called on to operate and that remains ignited or energized during the main burner Flame- Establishing Period. The ignition source is automatically extinguished or de-energized when each main burner Flame-Establishing Period is completed. Input rating — the gas-burning capacity of an appliance in Btu per hour as specified by the manufacturer. Appliance input ratings are based on sea level operation and need not be changed for operation up to 2,000 feet elevation. For operation at elevations above 2,000 feet, input ratings should be reduced at the rate of 4 percent for each 1,000 feet above sea level. Liquefied petroleum gases — the terms “Liquefied Petroleum Gases,” “LPG,” and “LP-Gas” as used in this Standard mean and include any material that is composed predominantly of any of the following hydrocarbons, or mixtures of them; propane, propylene, butanes (normal butane or isobutane), and butylenes.
Manifold — the conduit of an appliance that supplies gas to the catalytic pad(s). Maximum regulation capacity — the high limit of flow below which is found acceptable regulating characteristics. Noncombustible material — material that is not capable of being ignited and burned, such as materials consisting entirely of, or a combination of, steel, iron, brick, tile, concrete, slate, asbestos, glass, and plaster. Normal inlet test pressures — those pressures specified for testing purposes at which adjustment of burner ratings and primary air adjustments are made. Orifice — the opening in an orifice spud or other device whereby the flow of gas is limited and through which the gas is discharged. Orifice spud — a removable plug or cap containing an orifice that permits adjustment of the flow of gas by substitution of a spud with a different size orifice. Oxygen depletion safety (ODS) shutoff system — a system designed to act to shut off the gas supply to the catalytic pad(s) and pilot burner if the oxygen in the surrounding atmosphere is reduced below a predetermined level. Pilot — a gas flame(s) utilized to ignite the gas at a catalytic pad(s).
Propane HD-5 — propane that complies with the same requirements as “special-duty” propane, as defined by the Standard Specification for Liquefied Petroleum (LP) Gases, ASTM D1835. Purge — to free a gas conduit of air, gas, or a mixture of gas and air. Radiation shield — a separate panel or panels interposed between heating surfaces and jackets to reduce heat losses through radiation. Regulator, gas appliance pressure — a device for controlling a selected outlet gas pressure. Adjustable — 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 is 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.