|Description / Abstract
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|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
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
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
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
i) Room fan heater units, central heating furnaces, and similar
fixed electric space heating for comfort heating.
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.
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.
A fan coil unit includes a motor-operated fan or blower together
with a cooling coil, a heating coil, or both. The fan or blower is
intended to recirculate air, and can introduce air from outside of
the heated or cooled space. The coil can be used for refrigerant
cooling, for chilled water cooling, for hot water heating, for
steam heating, or for combinations of these functions.
A fan coil unit is intended to be piped to a remote source of
the heating and/or cooling mediums. A unit that includes an
electric resistance heater is considered to be a fan coil unit if a
water or refrigerant coil for comfort cooling and/or a water or
steam coil for comfort heating is provided in the unit.
A room fan heater unit is intended for heating only, includes a
motor-operated fan or blower, employs electric resistance heat as
the only heat source, and is intended to serve only one room or
A fan coil unit or electric space heating equipment, as covered
by these requirements, can be designed for free discharge of air to
the room or can be provided with means for duct connection.
A central warm air furnace is a heating appliance that consists
of an electric heating element or elements with an air-circulating
fan or blower, is provided with appropriate integral operating and
temperature-limiting controls, and is housed in an enclosure
designed to be connected to ductwork for the distribution of the
heated air remote from the unit.
The units referenced in Clause 1.1 can consist of one or more
factory-made assemblies. If provided in more than one assembly, the
separate assemblies are to be used together, and the requirements
are based on the use of matched assemblies. These requirements
apply to assemblies designed for free discharge of air into the
conditioned space as well as those which may be provided with means
for duct connection.
These requirements do not apply to add-on heat pump systems
designed to utilize the indoor fan motor assembly of an installed
a) the heat pump and furnace are intended to operate
simultaneously during heating operation except as noted in the
Exception to Clause 26.15; or
b) the refrigerant coil is intended to be mounted upstream
(return air side) of the furnace.
These requirements apply to equipment designed to be used in
nonhazardous locations in accordance with the rules of CSA C22.1,
ANSI/NFPA No. 70, CSA B52, ANSI/ASHRAE 15, NFPA 90A, and NFPA 90B,
and employ refrigerants that comply with the requirements of UL
Note: Requirements for the installation of units
designed to be connected to air duct systems are also included in
codes such as the BOCA Basic National Mechanical Code, the ICC's
Standard Mechanical Code, and the ICC's Uniform Mechanical
The values given in SI (metric) units are normative. Any other
values given are for informational purposes only.
Units intended for connection to telecommunication equipment are
to have the appropriate assembly containing such circuitry meet
CAN/CSA C22.2 No. 225 and UL 1459.
The following Clauses of CAN/CSA-C22.2 No. 0 are superseded by
the requirements of this Standard:
a) "General Requirements", Clause 3, and ²Construction Details²,
Clause 4 (refer to Clauses 2 through 35 of this standard);
b) "Marking", Clause 5 (refer to Clauses 36, 37, and 38 of this
c) "Tests", Clause 6 (refer to Clauses 39 through 72 of this
These requirements do not cover panel or cable type radiant
heating equipment, electric boilers, baseboard heaters, air
heaters, duct heaters, and unit coolers for refrigeration purposes,
nor any other electric heating equipment or appliances which are
covered in or as a part of separate, individual standards.
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