AKO AKO-D14545 - Neutral Zone Mode

D145H4502 Ed. 01
14
Neutral zone mode
WITHOUT FREQUENCY CONVERTER
In this mode, a neutral zone is defined, whose lower limit is the Set Point minus the bandwidth, and whose upper
limit is the Set Point plus the bandwidth. While the reading of probe 2 remains in that zone, no fans are connected
or disconnected.
If the upper limit is exceeded, the controller activates the different fans separated by the interval defined in parameter
t07 (red line) until returning to the neutral zone.
If the lower limit is exceeded, the controller deactivates the different fans separated by the interval defined in para-
meter t08 (green line) until returning to the neutral zone.
In order to deactivate a fan, the interval t05 must have passed, and interval t06 defines the minimum interval
between starts of the same stage/compressor.
SP+F06
SP-F06
SP
t07 t07
t08 t08
F01 F01
Direct
operation (C7=0)
Inverse
operation (C7=1)
Fan 4 ON
Upper limit
Lower limit
Zona neutra
Fan 3 ON
Fan 2 ON
Fan 1 ON
Pressure in probe 2
Fans