C22.2 No. 236-11

1 Scope 1.1 These requirements apply to the following stationary equipment for use in nonhazardous locations rated 7200 V or less, single- or 3-phase, and remote control assemblies for such equipment: a) Heat pumps, for heating and cooling with or without factory, or field-installed electric resistance heaters, or hot water or steam heating coils. b) Air conditioners for cooling with or without factory, or field-installed electric resistance heaters, or hot water or steam heating coils. c) Cooling portion and associated components of combination heating and cooling equipment employing gas-, oil-, or gas-oil-fired heating means. However, the requirements for the construction and performance of the gas-, oil-, or gas-oil-fired heating means, and their associated components, are to conform to the particular standards covering such heating equipment and components. d) Liquid chillers and compressor-evaporator or liquid chiller assemblies intended for use with remote condensers. e) Condensing units intended for connection to a remote nonspecified evaporator and compressor units intended for connection to a remote nonspecified evaporator and condenser. f) Add-on heat pumps for comfort heating or heating and cooling. g) Heat pump water heaters and refrigerant desuperheaters, and packaged heat pump water heaters consisting of a heat pump water heater and an associated storage tank. h) Fan units and fan coil units for comfort heating and/or comfort cooling. i) Room fan heater units, central heating furnaces, and similar fixed electric space heating for comfort heating. 1.2 The units referenced in Clause 1.1(g), self-contained heat pumps and air conditioners may be cord-connected if they a) are for indoor use only; b) are rated 250 V or less, single phase, with a marked rating of 24 A or less; and c) comply with Clause 1.11. 1.3 A fan unit includes a motor-operated fan or blower and is intended to be connected to a duct system that supplies conditioned air for environmental heating and/or cooling. Such a unit may have air-controlled dampers, but does not include a factory-installed heat exchanger or any other integral heating or cooling means.