Nortek VENMARCES VHC-36 - Page 47

Dirty Filter Sensor
The VHCs can be equipped with dirty filter sensors which
monitor the pressure across the filters and close the con-
tacts when the filters become restricted with dirt. Field
wired connections can be made to the terminal interface for
both the supply and exhaust filter sensors. Dirty filter sen-
sors are factory set to close contacts at 0.8” w.c. [200 Pa].
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DIRTY SUPPLY FILTER
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VAC+ OUTPUTS
20 VA MAXIMUM
DIRTY EXHAUST FILTER
Figure H8: Dirty filter control
IMPORTANT
On DDC units, there is no dirty filter sensor output to
connect to. Rather, the dirty filter sensor is connected to
the DDC controller and will display a dirty filter alarm on
the BacStat II (user interface) when it senses the filter is
dirty.
VCES-VHC-IOM-1F – VHC-36, -42 & -50
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