The MIN CFM ALM item sets the duct’s flow alarm set point. A
minimum flow alarm is defined as when the duct flow is less
than the MIN CFM ALM set point.
The 2 LOW ALM item sets the second sensor’s low alarm set
point. A low alarm condition is defined as when the magnitude
of the second sensor’s room pressure falls below or goes in the
opposite direction of the 2 LOW ALM set point. The alarm can
be a negative or positive pressure alarm set point.
The second sensor low and high alarms must be programmed
for the same pressure direction; positive or negative. In
addition, the PresSura controller has a minimum dead band of
40 ft/min between the second sensor low and high alarms. The
dead band helps prevent nuisance alarms.
The second sensor monitors the room pressure of a second
space (typically an ante room), and is not part of the primary
sensor or control sequence. This alarm is on when the DIM is in
positive or negative mode.
This item is enabled when the second pressure sensor item is
enabled (see menu item 2 SENSOR).
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