Johnson Controls (H,Y,C)IDM030B21E, Engineering Manual

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2-10
TC-16004-rev.2
DUCTED MEDIUM STATIC (ECONOFRESH)
2.12 Fan Performance
NOTE:
Field-supplied duct should be installed so that it does not exceed the upper limit of airflow volume. When the
internal pressure drop of the duct is limited, the airflow volume is higher.
This will cause abnormal stoppage, malfunction, and water splash.
Therefore, ensure that the internal pressure drop of the duct is equal to external static pressure by adjusting the
damper.
Above figure shows when the EconoFresh Pressure Mode is selected on the wired controller.
It is recommended to use at lower limit of airflow volume during the All Fresh mode.
(H,Y,C) IDM030B21E
with EF-456NE
(H,Y,C) IDM036B21E
with EF-456NE
(H,Y,C) IDM048B21E
with EF-456NE