CSA C746-06 pdf download – Performance standard for rating large and single packaged vertical air conditioners and heat pumps.
1 Scope 1.1 The purpose of this Standard is to establish the following for large and single packaged vertical air conditioners and heat pumps: (a) definitions; (b) classifications; (c) test requirements; (d) rating requirements; (e) minimum data requirements for published ratings; (f) operating requirements; (g) marking and nameplate data; (h) conformance conditions; and (i) minimum efficiency levels. 1.2 This Standard applies only to electrically driven, mechanical, vapour-compression-type systems charged with one of the refrigerants listed as Group 1 in CSA B52. 1.3 This Standard applies to equipment rated above 19 kW (65 000 Btu/h) cooling or heating capacity at standard rating conditions for both single- and three-phase electrical power supplies. All sizes of single packaged vertical air conditioners and heat pumps are covered in this Standard. Note: See Tables 1 to 3 for classifications of air conditioners, heat pumps, and air-conditioning condensing units. 1.4 In CSA Standards, “shall” is used to express a requirement, i.e., a provision that the user is obliged to satisfy in order to comply with the standard; “should” is used to express a recommendation or that which is advised but not required; “may” is used to express an option or that which is permissible within the limits of the standard; and “can” is used to express possibility or capability. Notes accompanying clauses do not include requirements or alternative requirements; the purpose of a note accompanying a clause is to separate from the text explanatory or informative material. Notes to tables and figures are considered part of the table or figure and may be written as requirements. Annexes are designated normative (mandatory) or informative (non-mandatory) to define their application.
2 Reference publications This Standard refers to the following publications, and where such reference is made, it shall be to the edition listed below, including all amendments published thereto. CSA (Canadian Standards Association) B52-05 Mechanical refrigeration code C22.1-06 Canadian Electrical Code, Part I ARI (Air-Conditioning and Re frige ration Institute ) 340/360- 2004 Commercial and Industrial Unitary Air-Conditioning and Heat Pump Equipment 365-2002 Commercial and Industrial Unitary Air-Conditioning Condensing Units ASHRAE (American Society of Heating, Refrigerating and Air-Conditioning Engine ers) 37-2005 Methods of Testing for Rating Electrically Driven Unitary Air-Conditioning and Heat Pump Equipment 90.1-2001 (withdrawn) Energy Standard for B uildings Except Low-Rise Residential B uildings 3 Definitions The following definitions apply in this Standard: Application rating— a rating based on tests performed at conditions other than standard rating conditions. Coe fficie nt of pe rformance (COP)— a ratio of the heating capacity expressed in watts to the power input in watts at any given step of rating conditions. Note:Supplementary resistance heat is excluded.
Comme rcial and industrial air-conditioning conde nsing unit— a factory-made assembly that includes a cooling coil, an air-moving device, and a compressor(s) and condenser combination; it can also include a heating function. Note:When this equipment is provided in more than one assembly, the separate assemblies are designed to be used together, and the rating requirements specified in this Standard are based on the use of matched assemblies. Commercial and industrial unitary air conditioneror heat pump— a factory-made assembly that normally includes an indoor conditioning coil, an air-moving device, one or more compressors, and one or more outdoor coils. In the case of an air conditioner, it can include a heating function in addition to the cooling function. In the case of a heat pump, it can include a cooling function in addition to the heating function. Note s: (1) Commercial and industrial unitary air conditioners provide, alone or in combination with a heating plant, air circulation, cooling, and dehumidifying functions and can include heating, humidifying, outdoor air ventilation, and air cleaning functions. (2) Commercial and industrial unitary heat pumps provide heating and air circulation functions and can include air cooling, dehumidifying, humidifying, outdoor air ventilation, and air cleaning functions. (3) When this equipment is provided in more than one assembly, the separate assemblies are designed to be used together, and the rating requirements specified in this Standard are based on the use of matched assemblies.CSA C746-06 pdf download.
