Alarm Conditions - Airstream EXPERT 2V3SA User Manual

EXPERT 2V3SA

12.1.2. Alarm Conditions

12.1.2.1. Temperature Alarms
The following diagram explains how tempera-
ture alarms are detected:
Temperature Alarms
Alarm
Limits
(T°)
Hi T°
alarm
High
Alarm
Limit
Set
Point
Low
Alarm
Limit
When the average room temperature ex-
ceeds the high temperature alarm setting, a
high temperature alarm is generated. When
the average room temperature drops below
the low temperature alarm setting, a low
temperature alarm is generated. Although
these settings are entered by the user as
absolute values, they are defined relative to
the current set point and are automatically
adjusted by the controller when the set point
changes. This means, for example, that when
the controller switches to the nighttime set
point, the high and low temperature alarms
are readjusted using the same offset from the
daytime set point.
The situation is slightly different when the out-
side temperature is greater than the set point.
In this case, the high alarm set point is replaced
by the outside temperature as the reference
point. Another parameter, called the critical
temperature, is defined to continue monitoring
the indoor temperature for high temperatures.
When the indoor temperature reaches the criti-
cal high temperature (defined as an absolute
value), an alarm is set off.
46
EXPERT 2V3SA, rev.10
Detection of
Room T°
12.1.2.2. Water Alarms
• Water Spill Alarms:
A water spill alarm sets off when the water
consumption exceeds a certain limit. This limit
can be adjusted from 0 to 1,000 gallons or
liters per 15 minutes. The alarm is activated if
a greater amount of water is detected within
the 15 minute interval. A separate water spill
limit can also be defined for day and night.
• Water Consumption Alarms:
When the percent difference in water con-
sumption between the last 24-hour period
and the previous 24-hour period is greater
than a given maximum value, an alarm is
set off.
Water Consumption
Previous 24h
The high and low water consumption alarm
limits are defined as follows:
• Case #1: If more water has been consumed
in the last 24 hours than in the 24 hours
that precede, the controller will determine
how much more water has been consumed
and will convert this value in percent. If the
surplus (in %) is higher than the "High Alarm"
limit, the controller will set off an alarm.
Last 24h - Previous 24h x 100 > Hi Alarm
Previous 24h
• Case #2: If less water has been consumed
in the last 24 hours than in the 24 hours that
precede, the controller will determine how
much less water has been consumed and will
convert this value in percent. If the deficit (in
%) is higher than the "Low Alarm" limit, the
controller will set off an alarm.
Previous 24h - Last 24h x 100 > Lo Alarm
Previous 24h
Time
Last 24h
Now