Variable Airfl Ow Operation (Vav) - S&P CADB/T-N PRO-REG Instrucciones De Uso

10.2.2. Variable airfl ow operation (VAV)
Mode recommended in single area confi guration for variable airfl ow applications depending
on a signal type 0-10v.
The set point value depends on a signal 0-10 V coming from an outdoor probe (CO , tempera-
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ture, relative humidity, etc.) or a manual percentage. The ratio between the fans is entered in
the form of a discharge/supply percentage.
Functional parameter setting:
Access to the simplifi ed parameter setting menu (via the password 1111) allows:
• The selection of the usage range of the signal 0-10V (see example below).
• The variation range of the supply fan's speed.
• The percentage applied to the discharge with respect to the supply.
Usage example:
Connection of a CO probe of
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a measurement range 0-2000
ppm (0-10V). Speed minimum
(25%) below 400 ppm and
maximum (100%) over 1600
ppm
Vmin = 2 V (400ppm)
Vmax = 8V (1600 ppm)
Speed at Vmin = 25%
Speed at Vmax = 100%
The selection of VAV mode in this installer menu automatically confi gures the screen of the
user menu. The user can then change the unit's operation without touching the settings.
Off: Stop the unit.
Manual: Manually selection of fan's speed.
Auto: Automatic control according to external probe.
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