When in Hot Gas Reheat, a separate fan speed provides adequate airflow.
Equipment Impacted
Systems utilizing Fixed Variable Speed fan configurations and
single-zone VAV units.
Note: No other fan configurations are capable of
supporting this functionality
Implementation Method
A new configuration point has been added to allow all systems
using Fixed Variable Speed fan configurations or single-zone VAV units to set a
different speed for use with Hot Gas Reheat. This speed is enforced when
the system is operating one compressor with Hot Gas Reheat active. If additional
compressors are energized, the appropriate 2nd, 3rd, or 4th stage fan speed will
take priority.
Note: For systems
requiring additional outputs be energized in conjunction to C1 in order to fully
load the HGR circuit, these additional stages ARE NOT considered such that they
would override the dehumidification fan speed.