Dehumidification; Temperature/Humidity Control Alarms; Return Air Temperature Alarm; Figure 2.8 Cooling W/No Economizer - Bard FUSION-TEC HR58APA Installation Support Materials

Compressor Stage 1
Compressor Stage 2
-10%
Deadband (sometimes called a neutral zone or dead zone) is an interval of a signal domain or
band where no action occurs
Electric Heat
Deadband (sometimes called a neutral zone or dead zone) is an interval of a signal domain or
band where no action occurs
FIGURE 2.10
Viewing Unit Stages

Dehumidification

The unit uses a dehumidification sequence that does
not require the electric heat to run at the same time
as the compressor. Instead, the unit will turn on the
compressor to cool down to the heating setpoint.
Once the lower setpoint has been reached, the unit
will heat the space back up to the upper setpoint.
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FIGURE 2.8
Cooling w/No Economizer
0% 10% 20% 30% 40%
Off
FIGURE 2.9
Heating
-10% 10% 30%
Off
50% 60% 70% 80%
Deadband On
50% 70% 90%
Deadband On
This cycle continues until the humidity level in the
shelter reaches an acceptable level. At this point,
the unit will revert back to normal operation. The
economizer may also be disabled while the unit is in
the dehumidification mode.
NOTE: This feature is dependent upon the LV1000
indoor humidity sensors and a command
from the LV to enter dehumidification mode.
See the LV manual for adjustment of the
dehumidification setpoint and differentials.

Temperature/Humidity Control Alarms

Return Air Temperature Alarm

When the return air temperature sensor value is out of
range (-41.0 to 303.0°F), the controller will generate
a sensor failure alarm to indicate the sensor is not
working properly.
This alarm is fixed and cannot be adjusted.
90% 100% 110% 120%
110%