Anteroom Positive
High Alarm
The Pos Hi Alm item sets the positive high pressure
alarm setpoint. A high alarm condition is defined as when
the magnitude of the room pressure rises above the
Pos Hi Alm setpoint.
This item is active when the TSI key switch is in positive
room pressure position or when POSITIVE is selected in
Room Mode item. However, it is always accessible
through the menu system.
-0.19500 in. W.C. to
+0.19500 in. W.C.
(TSI SENSOR)
-1.0 in W.C. to
+1.0 in W.C.
(PRESSURE
TRANSDUCER)
Pos Hi Alm cannot
be set less positive
than the
Pos Low Alm
The Alarm Enable item enables the low and high alarm
functions. When this item is entered, the Model RPC30
will show buttons for Low Alarms and High Alarms. Press
the button to toggle between enabling and disabling the
alarms.
Low Alarms
Enabled
High Alarms
Disabled
ALARM CONSTRAINTS
There are a number of constraints that prohibit you from incorrectly adjusting the set points. These are as follows:
1. Room mode. The positive pressure alarms are only active when positive control is selected. Negative pressure alarms are only active
when negative control is selected. In no isolation mode all alarms are turned off.
2. The PresSura controller is programmed with deadbands between alarm setpoints and control setpoints to prevent the controller from
cycling between high and low alarms due to normal fluctuations. Setpoint deadbands are:
Pressure = 0.001.0 in. W.C.
Flow = 50 cfm
Temperature = 1°F
Relative Humidity = 1%
Position = 1% Open
Example: If your control NEG SETPNT is set at -0.01.0 in. W.C., the NEG HI ALARM setpoint cannot be set less negative than -0.011.0
in. W.C.
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