Load-based and climate-specific testing and rating procedures for heat pumps and air conditioners
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This is the first edition of CSA EXP07, Load-based and climate-specific testing and rating procedures for heat pumps and air conditioners. This Express Document is not a consensus product; that is, it is not a Standard and it has not been formally reviewed or approved by a CSA Technical Committee. This Express Document may be used as a basis for further standardization.
This Express Document presents an alternative approach to testing the performance of heat pumps and air conditioners. In the past, most performance test procedures have required the monitoring of equipment while operating under steady state conditions, at a fixed capacity, while subjected to specific, fixed indoor and outdoor air conditions. This procedure uses a dynamic load-based test approach in which the indoor room is subjected to a simulated load, and the equipment is allowed to respond accordingly as it tries to maintain the desired indoor conditions, while outdoor room conditions are held constant. This allows the actual behaviour of the equipment and controls to be measured in the test facility in a manner much more representative of in situ performance. For those portions of the test procedure where the simulated load might exceed the equipment capacity, more conventional full- load testing is used.
These procedures apply to unitary air conditioners and heat pumps that are
b) air-source and air-sink;
c) single-split systems with matching assemblies or single package for use in ducted and/or non-ducted distribution systems;
d) intended for space-heating and/or air-conditioning applications in buildings;
e) electrically driven, mechanical, vapour-compression-type systems; and
f) rated below 65,000 Btu/h (19.0 kW) heating or cooling at standard rating conditions, in accordance with Clause 5.2.
Note: This includes space-constrained single-package or split-system and small-ducthigh-velocity central air conditioners and heat pumps matching assemblies of the type classified in Clause 1.2 and intended for air-conditioning and space-heating applications in buildings.
These procedures do not apply to the following:
a) water to air and/or water units; and
b) heat recovery.
1.2 Unitary equipment
Unitary equipment within the scope of these procedures is outlined in Table 1.
In these procedures, shall is used to express a requirement, i.e., a provision that the user is obliged to satisfy in order to comply with these procedures; 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 these procedures; 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.
1.4 Units of measurement
The values given in IP (inch-pound) units are normative. Metric values given in parentheses are for information only.