ANSI Z21.5.1-2015 pdf free download

ANSI Z21.5.1-2015 pdf free download.Gas clothes dryers, volume I, type 1 clothes dryers.
3 Definitions The following definitions shall apply in this Standard: Air mixer — that portion of an injector burner into which the primary air is introduced. Air shutter — an adjustable device for varying the size of the primary air inlet(s). Appliance, automatically controlled — an appliance equipped with an automatic device that: a) accomplishes complete “turn-on” and “shut-off” of the gas to the main burner(s); or b) graduates the gas supply to the burner(s) but does not affect complete shut-off of the gas. Automatic gas ignition system — a system designed to ignite and re-ignite an appliance burner(s). Such systems shall: a) automatically ignite gas at the main burner; b) prove the presence of either the ignition source, the main burner flame, or both; and c) automatically act to shut off the gas supply to the main burner when the supervised flame or ignition source is not proved. Automatic gas ignition system timings — Flame failure re-ignition time — the period of time between loss of the supervised ignition source or the supervised main burner flame and attainment of the capability of the ignition means to ignite gas. During this time period, the main burner gas supply is not shut off.
Flame failure response time — the period of time between loss of the supervised ignition source or the supervised main burner flame and the action to shut off the gas supply. Lockout — the automatic action to end an ignition sequence. Re-initiating another ignition sequence requires a manual operation. Lockout time — the period of time between energizing the system and lockout if proof of the supervised ignition source or the supervised main burner flame is not established. Re-initiating the lighting procedure requires a manual operation. Purge time — the period of time intended to allow for the dissipation of any unburned gas or residual products of combustion. Pre-purge time — the purge time that occurs at the beginning of an appliance operating cycle prior to initiating ignition. Inter-purge time — the purge time that takes place between the end of a trial for ignition period and reactivation of the ignition means on a multi-try system. Post-purge time — the purge time that occurs at the end of an appliance burner operating cycle. Recycle time — the period of time between shut-off of the gas supply following loss of the supervised ignition source or the supervised main burner flame and reactivation of the ignition source. Trial for ignition period — the period of time between energizing and de-energizing the gas valve, if proof of the supervised flame is not established. Δ Baffle, tumbler — a paddle inside the drum that lifts and tumbles clothes. Base — the lowest supporting frame or structure of the appliance, exclusive of legs. Δ Blocking device, gas appliance pressure regulator — a special device used to bypass the gas appliance pressure regulator for the purpose of converting the dryers to propane gas. Body — the principal structure of an appliance including the supporting frame, which gives strength and rigidity to the appliance.
BTU — abbreviation for British Thermal Unit. The quantity of heat required to raise the temperature of 1 pound of water 1°F (0.45 kg of water 0.5 °C). Burner — a device for the final conveyance of the gas, or a mixture of gas and air, to the combustion zone. Atmospheric injection burner — a burner in which the air at atmospheric pressure is injected into the burner by a jet of gas. Injection (Bunsen) burner — a burner employing the energy of a jet of gas to inject air for combustion into the burner and mix it with the gas. Luminous or yellow flame burner — a burner in which secondary air only is depended on for the combustion of the gas.