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• Check that the switch “SW1” is set to SOURCE.
WARNING: in cases where a single variable frequency drive is used to control two
motors, the thermal protection devices must be connected in series.
6.7.2.2 CONfIGUrING THE DIffErENTIal PrEssUrE TraNsMITTEr
(TDP-s & TDP-D))
• If you wish to configure the equipment to operate under constant pressure control, you can
use differential pressure transmitter models TDP-S or TDP-D. If you wish to operate with
constant airflow control you must use the TDP-D model.
The way you connect the pressure tubes depends on the type of control required, as
shown in the diagram below:
Summary of Contents for UTBS Series
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