7340_7350-25-33 Series Operations Manual
Rev J 3-31-21
Page 31 of 92
ACCESSORY OPERATION
HUMD311-4,-4 Humidity System
The HUMD311 Humidity option has controlled humidity injection. Typically
dehumidification is done by utilizing a wet coil (dehum coil) that is part of the
refrigeration system. Dehumidification is done by utilizing an air pump. The pump
injects fresh air into the chamber, displacing the humidified air. The pump cycles on/off
based on the humidity setpoint. This results in dehumidification and humidity control
without the use of a refrigeration system wet coil (dehum coil).
Refer to section Changing Humidity Setpoints to set the desired humidity setpoint.
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