CVS-21HA.rev.03
19
When the minimum speed curve is activated, it will effectively be in
operation (i.e. the controller will begin to adjust the minimum speed
according to the specified points of the curve) only when the current
day number of the temperature curve reaches the first day number of
the minimum speed curve.
For example:
Bandwidth [°F or °C] - The stage 1 bandwidth is the variation in the room
temperature between the moment the stage 1 fans run at minimum speed
and the moment they reach full speed.
Variable speed ventilation:
When ventilation is required for a cooling purpose,
the stage 1 fans stop operating according to the
minimum ventilation cycle. The fans start to operate
continuously and their speed varies according to
the room temperature.
POINT
1
POINT
2
d5
d10
90.0 °F
85.0 °F
10 %
20 %
If you activated the temperature curve yesterday, the current day
number of the temperature curve is d6. Therefore, if you activate the
minimum speed curve today, it will effectively be in operation only
tomorrow, when the current day number of the temperature curve
reaches d7. In the meantime, the fans will run at the specified
single minimum speed.
If you activated the temperature curve three days ago, the current
day number of the temperature curve is d8. Therefore, if you activate
the minimum speed curve today, it will effectively be in operation the
moment you activate it. In this case, the current minimum speed will
be a value between 10% and 20%.
d7
d10
Temperature
Day number
Day number
Speed
MINIMUM SPEED CURVE
TEMPERATURE CURVE
