Minimum Ventilation Speed Ramp - Airstream INTER 2V4SA User Manual

INTER 2V4SA
III. Adjusting the Compensation
Speed
This is the percentage of increase in minimum
speed for a relative humidity equal to the
humidity set point + 10%. The value ranges
from 0 to 100%.
• Select the STAGE 1 RH COMPENSATION
menu.
• Press the Other Functions button. The
minimum speed compensation is displayed,
alternating with the letters "SPEEd".
• Use the adjustment buttons to set it to the
desired value.
IV. Activating/Deactivating Humid-
ity Compensation
• Select the STAGE 1 RH COMPENSATION
menu.
• Press the Other Functions button twice. The
current on/off state of humidity compensa-
tion flashes on the display.
• Use the adjustment buttons to enable or
disable this function.
24
INTER 2V4SA, rev.02
8.4. Minimum Ventilation
Speed Ramp
The controller can automatically adjust the
minimum ventilation speed of stage 1 fans
with time. The minimum ventilation curve is
composed of 10 steps and each step associ-
ates a speed with a day number. Once the
curve is enabled, the controller changes the
minimum ventilation speed of stage 1 fans
every hour in a linear fashion between con-
secutive steps of the curve. When it reaches
the last step, the controller keeps using the
last minimum ventilation speed associated
with that day.
Min. Ventilation
Min.Vent
Speed
(stage 1)
Speed 10
Speed 9
Speed 8
Speed 7
Speed 6
Speed 5
Speed 4
Speed 3
Speed 2
Speed 1
1 2 3 4 5
Notes: Certain restrictions apply to reduce
the risk of errors:
i) Decreasing minimum speeds are not al-
lowed.
ii) All ten steps must be specified. If you don't
need 10 different steps, repeat the last mini-
mum speed for each unnecessary step.
iii) The minimum speed ramp must be deac-
tivated before specifying the steps on the
ramp (see below).
iv) The min. speed variation cannot exceed
10% per day.
Ramp
6 7 8 10 11 12 DAYS