Cumberland EDGE 890-00601, Installation And User Manual

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Chapter 24: Alarms and troubles
Static pressure alarms have a special logic tied to fan operation. To prevent false low static pressure
alarms, static pressure alarms are prohibited in the following circumstances:
• Transiting from a ventilation mode to another
• In Natural ventilation
• In the Off portion of ventilation cycle time (when all fans are Off)
• When inlets are moving within a ventilation cycle as a result of stopping timer based variable
capacity fans. Alarms are not inhibited when moving inlets as a result of static pressure compensa-
tion action.
• When calibrating an inlet
• When time position inlets are resetting
Low static pressure alarm is enabled only at a certain age, when minimum air is large enough to compen-
sate for infiltration levels and create negative pressure. For hallway and solar wall service rooms, static
pressure alarm is not tied to ventilation mode and the user interface is slightly different. In these service
rooms, a static pressure sensor must be configured for the static pressure alarm type to be shown.
Relative humidity alarm
Relative humidity alarms are available for all production types, including hallway, solar walls, and service
rooms. Relative humidity alarms are issued regardless of ventilation modes, but only in production mode
for production rooms. Relative humidity alarm setup is available only when a relative humidity sensor is
installed in the house/barn.
The alarm recognition time is 15 seconds, and the recovery time is equal to the recognition time. The
alarm value hysteresis is 1%, meaning that an alarm is considered recovered when the relative humidity
value differs by 1% from the alarm threshold.
Water consumption alarms
When the water consumption between the last 24-hour period and the previous 24-hour period is greater
than the entered maximum value, an alarm is set off. This verification applies to each individual meter,
and is calculated every hour. A water consumption alarm only occurs in Production mode. When more
water has been consumed in the last 24 hours than in the 24 hours that precedes it, an alarm is setoff if
the surplus (in %) is higher than the High Consumption Alarm limit. When less water has been consumed
in the last 24 hours than in the 24 hours that precedes it, an alarm is setoff if the deficit (in %) is lower
than the Low Consumption Alarm limit. Water consumption alarms cannot recover on their own; they
need to be acknowledged. Acknowledging the alarm resets the associated specific alarm relay. For the
first 24 hours after acknowledgment, thresholds are squared and previous 24 hours is substituted with the
previous 48 hours.
On initial controller startup a 48 hour countdown starts when production is started. This time is needed to
acquire at least 48 hours of data to start looking for water consumption alarms. The water meter equip-
ment tile shows total water consumption since the last statistics reset in the animal main screen tile.
Water spill alarms
To detect a water spill, each water meter is given a high limit of water flow within an adjustable time
window. A water spill alarm is triggered when the water consumption exceeds the set amount of water
within the set delay in minutes. This alarm limit ranges from 0 to 10,000 gallons (or 40000 liters) between
1 and 60 minutes. Selected specific alarm relays can be connected to a water supply electro-valve. Water
spill alarm settings are water meter specific. The maximum water volume can be set through a water spill
curve or can be set manually. You can not manually set the maximum water volume if the water spill
164 895-00693 EDGE