23
9.4.3. Fan selection that acts as a master
(only available on units controlled via Modbus in COP mode)
Using the
SW4.3
selector it is possible to defi ne which of the two fans acts as a master. The fan defi ned
as master must be the one that supplies or extracts air from the network of ducts in which the pressure
transmitter is installed.
The speed of the fan defi ned as a slave is regulated as a percentage of the speed of the master fan, being
possible to apply a percentage of unbalance.
6:
6:
6:
6:
21
2))
SW4.3
COP motors confi guration
OFF
Supply master- Extract slave
ON
Extract master- Supply slave
9.4.4. Operation at Variable Airfl ow (VAV) mode, depending on an external sensor
(CO
2
, temperature or relative humidity)
CADB/T-HE BASIC units can regulate fan control speed proportionally to the signal of an external sensor
with 0-10V output. The increase of the sensor measure causes the fan speed to be increased according
to a previoulsy confi gured proportional ramp.
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6PLQ
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Fan regulation
output
(0-10 VDC)
Sensor input
(0-10 V)
From factory, this functionality is disabled. The automatic operation mode is enabled and confi gured by
means of the jumper in the X31 pin strip (in the controller board). The position of the jumper depends on
the type of sensor used according to the following table:
Without
sensor
CO2
Temp.
Hum. Rel.
Control
0-10V
desde BMS
Not used
Not used
Jumper position
1
2
3
4
5
6
7
Range
-
2000ppm
50ºC
100%
10V
Setpoint
-
1100ppm
25ºC
50%
5V
Offset reg. (+/-)
-
400ppm
2ºC
5%
2.5V
Alarm
-
1600ppm
28ºC
70%
10V
Smin
-
2V
2V
2V
2V
Smax
-
10V
10V
10V
10V
