1.1 This Standard provides requirements for rating, performance, and tests of all sizes of factory-assembled packaged terminal air-conditioners and heat pumps (as defined in Clause 2.1) intended for use in residential, commercial, and industrial heating and cooling systems.
1.2 This Standard applies to electrically operated, vapour- compression refrigeration systems.
1.3 This Standard does not apply to room air-conditioners, room fan-coil air-conditioners, water-source heat pumps, or unitary single packaged air-conditioners and heat pumps.
1.4 The primary unit values given are in SI (metric) units. The values given in parentheses are in foot-pound units.
1.5 Where used in this Standard, shall, should, recommended, and may shall be interpreted as follows:
SHALL - where shall or shall not is used for a provision specified, that provision is mandatory if compliance with the Standard is claimed.
SHOULD, RECOMMEND - are used to indicate provisions that are not mandatory, but are desirable as good practice.
MAY - is used to indicate provisions that are optional at the discretion of the manufacturer.