Dectron, Inc. March 2012
Owner’s Manual DSH/DSV/RSH/DBH/RBH Series Dehumidifier
Special Requirements Ducts Installation
Data subject to change without notice.
89
Some options may have special duct requirements.
If your unit is equipped with the optional SmartSaver feature, refer to Dectron OM Appendix M3 - SmartSaver.
If your unit is equipped with the optional economizer feature, refer to Dectron OM
Appendix M5 - Economizer.
If your unit is equipped with the optional Purge feature, refer to Dectron OM
Appendix M6 - Purge.
INSTALLATION
All units:
This is not a convenience air conditioner - it is a process dehumidifier. Proper airflow is essential.
Be sure to arrange sections of the supply duct, the outdoor-air intake duct (if any), and the exhaust-air duct
(if any) for airflow measurement. The traversing plane for airflow measurement should be accessible and
1. full-sized, unbranched, and straight for at least
three effective duct diameters upstream of the traversing
plane, or per ASHRAE 111-2008, whichever is greater, and
2. full-sized, unbranched, and straight for at least one effective duct diameter downstream of the traversing
plane, or per ASHRAE 111-2008, whichever is greater.
For this purpose, the effective duct diameter E
L
is given by
E
L
= √ 4ab / π
Leave a tag on the unit electrical enclosure specifying the location of the duct traversing plane.
duct-traversing plane
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