CSA ANSI Z21.74:2017 pdf download.Portable refrigerators.
CSA ANSI Z21.74 covers gas-fired refrigerators employing the absorption or adsorption principle of refrigeration, hereinafter referred to as refrigerators or appliances, having refrigerated spaces for:
a) storage of foods; or
b) storage of foods and making ice; or
c) storage of frozen foods and making ice; or
d) storage of foods and the storage of frozen foods and making ice.
CSA ANSI Z21.74 applies to newly produced, unvented, portable refrigerators constructed entirely of new, unused parts and materials, with input ratings of 1000 Btu per hour (293 W) or less, and which are for use with propane gas, butane gas, or propane-butane gas mixtures which are referred to as LP-gas. If a clause references a specific gas then that clause is limited to the specific gas. These refrigerators are intended for use both indoors in adequately ventilated structures and outdoors.
CSA ANSI Z21.74 applies to portable type gas refrigerators having:
a) a regulated outlet pressure when connected to a self-contained propane gas supply system having a maximum size of 20 lb (9.1 kg) of fuel and operating at a regulated outlet pressure not to exceed 11 inches water column (2.74 kPa);
b) a regulated or non-regulated outlet pressure when connected to a self-contained fuel supply using either a CGA No. 600 or UL 147B connection and a disposable cylinder of nominal water capacity of 2.7 lb (1.1 kg) [nominal 1 lb (0.45 kg)] LP-gas or less.
Portable refrigerators are intended for use as described below:
a) for indoor use in small recreational enclosures, provided that the enclosure have means for adequate combustion air and ventilation. The portable refrigerators are for use with a CGA No. 600 or a UL 147B connection and a disposable cylinder of nominal water capacity of 2.7 lb (1.1 kg)nominal 1 lb (0.45 kg)] LP-gas or less;
b) for outdoor use with a self-contained propane gas supply system having a maximum size of 20 lb (9.1 kg) of fuel, when operating at regulated outlet pressure not to exceed 11 inches water column (2.74 kPa);
c) for outdoor use with a CGA No. 600 or UL 147B connection and a disposable cylinder of nominal water capacity of 2.7 lb (1.1 kg) [nominal 1 lb (0.45 kg)] LP-gas or less. Butane and butane-propane mixture cylinders are limited to a maximum capacity of 10 oz (284 g) of liquid fuel.
CSA ANSI Z21.74 applies to refrigerators connected to:
a) an integral LP supply cylinder; or
b) a remote propane supply cylinder.
Fuel supplies are to be in accordance with the Standard for the Storage and Handling of Liquefied Petroleum Gases, NFPA 58.
CSA ANSI Z21.74 applies to ref rigerants in quantities not exceeding 6 lb (2.7 kg) and that comply with the applicable provisions of the Standard Safety Code for Mechanical Refrigeration, ASH RAE 15.
CSA ANSI Z21.74 also covers all electrical equipment, wiring, and accessories built in or supplied with refrigerators for use with low voltage direct current or alternating current.
If a value for measurement as given in this Standard is followed by an equivalent value in other units, the first stated value is to be regarded as the specification.
All references to psi throughout this Standard are to be considered gauge pressures unless otherwise specified.
CSA ANSI Z21.74 contains SI (Metric) corresponding to the yard/pound quantities, the purpose being to allow the standard to be used in SI (Metric) units. IEEE/ASTM SI 10, American National Standard for Metric Practice, or ISO 80000-1:2009, Quantities and units — Part 1: General, is used as a guide in making metric conversion from yard/pound quantities.) If a value for a measurement and a corresponding value in other units are stated, the first stated value is to be regarded as the requirement. The given corresponding value may be approximate. If a value for a measurement and a corresponding value in other units are both specified as a quoted marking requirement, the first stated unit, or both shall be provided.CSA ANSI Z21.74 pdf download.