CAN/CSA-C746-93

1.1 This Standard provides methods for rating factory-made commercial and industrial unitary air conditioners, heat pumps, and condensing units of the types classified in Clause 1.4, intended for air-conditioning and space heating applications. 1.2 This Standard applies only to electrically-driven, mechanical, vapour-compression-type systems charged with one of the refrigerants listed in Group 1 of CSA Standard B52. 1.3 This Standard applies to equipment rated above 19 kW (65 000 Btu/h) but below 73 kW (250 000 Btu/h) cooling or heating capacity at standard rating conditions as listed in Clause 7. 1.4 Unitary equipment within the scope of this Standard is classified as shown in Tables 1, 2, and 3. 1.5 The values given in Sl (metric) units are the standard. The values given in parentheses are for information.