CSA ANSI Z21.11.2:2016 pdf download.Gas-fired room heaters, volume II,unvented room heaters
1.1 CSA ANSI Z21.11.2 applies to newly produced gas-fired unvented room heaters and gas-fired unvented decorative room heaters for connection to the house fuel supply system (see Clause 3), hereinafter referred to as room heaters or appliances, constructed entirely of new, unused parts and materials,having input ratings up to and including 40,000 Btu/hr (11,723 W) except:
a) unvented room heaters suitable for installation in bedrooms have input ratings of 10,000 Btu/hr (2,931 W) or less; and
b) unvented room heaters suitable for installation in bathrooms have input ratings of 6000 Btu/hr (1,758 W) or less.
1.2 This Standard covers unvented room heaters and gas-fired unvented decorative room heaters that comply with either of the following types:
a) shipped from the factory equipped specifically for use with one gas only. Field conversion of gas types by any means including the use of a kit are not permitted; or
b) a universal unvented room heater shipped from the factory equipped with a switching means for selecting the type of gas to which it is being connected.
Combustible material一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.
Discharge air opening一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一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一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一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.CSA ANSI Z21.11.2 pdf download.