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6.3.2.1. Airflow
This option allows the installer to select the appropriate air flow based on the needs
of the installation. The QUIET airflow means the minimum cooling airflow that the
system can safely run (typically 300 CFM/ton). Use this setting if duct noise is a
severe problem. Note that duct sweating in high humidity environments could
become an issue at low airflows. The COMFORT airflow means airflow is varied
depending on humidity and temperature demand settings. This selection enables the
full dehumidify and comfort capabilities of the system. The EFF325 airflow is a
fixed airflow used to achieve specified ratings – no dehumidification airflow
reduction is performed. This is nominally 325 CFM/ton, but will vary if a 2--stage
outdoor unit is used. The EFF350 airflow is a fixed airflow used to achieve
specified ratings – no dehumidification airflow reduction is performed. This is
nominally 350 CFM/ton, but will vary if a 2--stage outdoor unit is used. The MAX
airflow is a fixed 400 CFM/ton. No dehumidification airflow reduction is
performed.
NOTE: For Geothermal Heat Pumps, the airflow labels have been changed from
EFF325 and EFF350 to EFF1 and EFF2, respectively. Nominal geothermal system
airflows for these settings tend to be different than the typical 325 and 350 CFM/ton
values.
The dehumidify airflow, when set to NORMAL,isallowedtoadjusttoaminimum
to satisfy the dehumidification call. When set to HIGH, the minimum airflow
during the dehumidify mode is increased to reduce duct and register sweating. Also
the airflow increases minimum airflow during normal cooling operation to help
reduce duct sweating.
After the selections are made, touch SAVE.
S Cooling Airflow: Quiet, Comfort, EFF325 (or EFF1), EFF350 (or EFF2), or
Max
d Default = Comfort
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