CSA C22.2 NO. 236-15

Preface

This is the harmonized CSA Group and UL standard for Heating and Cooling Equipment. It is the fifthedition of CSA C22.2 No. 236 and the fifth edition of UL 1995. This edition of CSA C22.2 No. 236 andUL 1995 supersedes the previous editions published in 1995, 1990, 2005 and 2011.

Scope

1.1
These requirements apply to the following stationary equipment for use in nonhazardous locationsrated greater than 600 volts up to 7200 V, and remote control assemblies for such equipment:

a) Heat pumps, for heating and cooling with or without factory, or field-installed electricresistance heaters, or hot water or steam heating coils;

b) Air conditioners for cooling with or without factory, or field-installed electric resistanceheaters, or hot water or steam heating coils;

c) Liquid chillers and compressor-evaporator or liquid chiller assemblies intended for use withremote condensers;

d) Add-on heat pumps for comfort heating or heating and cooling; and

e) Heat pump water heaters and refrigerant desuperheaters, and packaged heat pump waterheaters consisting of a heat pump water heater and an associated storage tank;

Note: The above equipment rated 600 V or less are covered by the scope of ANCE/CSA/UL 60335-2-40.

1.2
These requirements apply to the following stationary equipment for use in nonhazardous locationsrated 7200 V or less, single or 3-phase, and remote control assemblies for such equipment:

a) Cooling portion and associated components of combination heating and cooling equipmentemploying gas-, oil-, or gas-oil-fired heating means. However, the requirements for theconstruction and performance of the gas-, oil-, or gas-oil-fired heating means, and theirassociated components, shall conform to the particular standards covering such heatingequipment and components;

b) Condensing units intended for connection to a remote nonspecified evaporator andcompressor units intended for connection to a remote nonspecified evaporator and condenser;and

c) Room fan heater units, central heating furnaces, and similar fixed electric space heating forcomfort heating.

Note: The equipment mentioned in Clauses 1.3, 1.4, 1.5, 1.6, 1.7 and 1.13 are rated 7200 V or less, single or3-phase. These products are not covered by the scope of ANCE/CSA/UL 60335-2-40.

1.3
A fan unit includes a motor-operated fan or blower and is intended to be connected to a duct systemthat supplies conditioned air for environmental heating and/or cooling. Such a unit may have air-controlleddampers, but does not include a factory-installed heat exchanger or any other integral heating or coolingmeans.

1.4
A fan coil unit includes a motor-operated fan or blower together with a cooling coil, a heating coil, orboth. The fan or blower is intended to recirculate air, and can introduce air from outside of the heated orcooled 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.

1.5
A fan coil unit is intended to be piped to a remote source of the heating and/or cooling mediums. Aunit that includes an electric resistance heater is considered to be a fan coil unit if a water or refrigerantcoil for comfort cooling and/or a water or steam coil for comfort heating is provided in the unit.

1.6
A room fan heater unit is intended for heating only, includes a motor-operated fan or blower, employselectric resistance heat as the only heat source, and is intended to serve only one room or space.

1.7
A fan coil unit or electric space heating equipment, as covered by these requirements, can bedesigned for free discharge of air to the room or can be provided with means for duct connection.

1.8
A central warm air furnace is a heating appliance that consists of an electric heating element orelements with an air-circulating fan or blower, is provided with appropriate integral operating andtemperature-limiting controls, and is housed in an enclosure designed to be connected to ductwork for thedistribution of the heated air remote from the unit.

1.9
The units referenced in Clause 1.1 and 1.2 can consist of one or more factory-made assemblies. Ifprovided in more than one assembly, the separate assemblies are to be used together, and therequirements are based on the use of matched assemblies. These requirements apply to assembliesdesigned for free discharge of air into the conditioned space as well as those which may be provided withmeans for duct connection.

1.10
These requirements do not apply to add-on heat pump systems designed to utilize the indoor fanmotor assembly of an installed furnace where:

a) The heat pump and furnace are intended to operate simultaneously during heating operationexcept as noted in the Exception to Clause 26.17; or

b) The refrigerant coil is intended to be mounted upstream (return air side) of the furnace.

1.11
These requirements apply to equipment designed to be used in nonhazardous locations inaccordance with the rules of CSA C22.1, ANSI/NFPA No. 70, CSA B52, ANSI/ASHRAE 15, NFPA 90A,and NFPA 90B.Note 1: Requirements for the installation of units designed to be connected to air duct systems are also includedin codes such as the BOCA Basic National Mechanical Code, the ICC’s Standard Mechanical Code, and the ICC’sUniform Mechanical Code.

Note 2: Coolant distribution equipment are intended for use in an information technology room (ITE) that compleswith NFPA 75.

1.12
The values given in SI (metric) units are normative. Any other values given are for informationalpurposes only.

1.13
Units intended for connection to telecommunication equipment are to have the appropriate assemblycontaining such circuitry meet CAN/CSA C22.2 No. 225 and UL 1459.

1.14
The general requirements of CSA C22.2 No. 0 apply, except as follows:

a) “General Requirements”, Clause 3, and “Construction Details”, Clause 4 (refer to Clauses 2through 36 of this standard);

b) “Marking”, Clause 5 (refer to Clauses 43, 44, and 45 of this standard);

c) “Tests”, Clause 6 (refer to Clauses 46 through 79 of this standard).

1.15
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 otherelectric heating equipment or appliances which are covered in or as a part of separate, individualstandards.

Edition:

5th

Published:

07/01/2015

ISBN(s):

9781771398312

Number of Pages:

196

File Size:

1 file , 2 MB

Product Code(s):

2423422, 2423422

Note:

This product is unavailable in Russia, Ukraine, Belarus