Preface The standards set forth herein apply to the second edition of the Standard for Portable Refrigerators for Use With HD-5 Propane Gas, Z21.74-1992 (R2006), and supersede corresponding standards therein. Following their preparation by the supervising Technical Advisory Group, they were accepted by the American National Standards Institute (ANSI) and subsequently approved.

Scope:

This standard covers gas-fired refrigerators, having refrigerated spaces for storage of foods with input ratings of 1000 Btu/hr (293 W) or less, and which are for use with HD-5 propane gas only. These refrigerators are intended for use both indoors in adequately ventilated structures and outdoors. This standard applies to refrigerators designed for self-contained fuel supplies and using fuel cylinders of not more than 75 in3 (1 230 cm3) (21/2 pounds nominal water capacity). Fuel supplies shall be in accordance with the Standard for the Storage and Handling of Liquefied Petroleum Gases, ANSI/NFPA No. 58.