F – Ductwork Connection
April, 2018 F-2 INM.XX.X.00
Duct Connection – Special Cases
Supply Air ductwork connection – SA Temperature Sensor installation.
Some dehumidifiers may require SA (supply air) temperature sensor to be installed in the duct after duct is
connected.
In this case dehumidifier SA temperature sensor,
tagged “SUPPLY AIR TEMP SENSOR TO BE
INSTALLED IN DUCT” (see Pic. F.1), would be
attached to the side or roof of the dehumidifier -
such sensor is pre-wired to the dehumidifier
control board at the factory and needs to be
installed in supply ductwork.
Install sensor at least 2’- 4’ downstream
of the dehumidifier or externally
mounted space heater (if one is
controlled by the dehumidifier) in the
middle of the width of the duct.
Field-installed duct-mounted space heater.
If space heater (gas duct heater, hot water or steam coil, electric heater, etc.) is not packaged with the
dehumidifier and to be installed in the duct on site:
follow said space heater manufacturer installation instructions (duct transitions, distances, clearances,
support, direction, etc.), respective local codes and regulations and standard field practices.
Install space heater in the supply duct, downstream of the dehumidifier.
It is recommended for the space heater to be controlled by the dehumidifier control system (for efficient
operation and air temperature maintenance).
Gas-fired duct heater. Indoor-installed gas heater requires respective venting to be installed. Follow the
heater manufacturer recommendation and respective local codes to select and install the venting system.
Pic.F.1
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