Unit installation

January 2010 Application Note 1013
©2012 Mitsubishi Electric US, Inc.
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“Rated Capacity” is the system output capacity observed at standard AHRI rated
testing conditions (47°F, and 17°F outdoor for heating). AHRI testing, performed to
AHRI-210/240, requires the compressors to be run at a constant speed (60Hz) due to
testing limitations. Any advantage gained by variable speed equipment is not exhibited in
the test results. The test result values are listed in the AHRI Directory of Certified
Product Performance, which is accessible through the AHRI website. These values are
also listed and identified in all Mitsubishi Electric HVAC published resources, including
brochures, technical documentation, and the website.
“Maximum Capacity” is the actual output capacity units will produce when trying to
achieve set point condition (selected room temperature) from relative load condition
(current room temperature). The greater the load requirement, the more the capacity
increases until maximum capacity of the unit is reached. Maximum Capacity was equal
to Rated Capacity before the introduction of inverter drive variable-speed compressor
systems. Maximum Capacities are also listed and identified in all Mitsubishi Electric
HVAC published resources.
Example: MSZ-FE12NA, 12,000 BTU/h Heat-pump System
 Rated Heating Capacity at 47°F = 13,600 BTU/h
 Rated Heating Capacity at 17°F = 8,300 Btu/h
 Maximum Heating Capacity at 17°F = 13,600 BTU/h
Due to continuing improvement, above specification may be subject to change without notice.
2013 P-Series and M-Series - Application Notes (June 2013)
APP-30