Fan Selection That Acts As A Master (Only Available On Units Controlled Via Modbus In Cop Mode); Operation At Variable Airfl Ow (Vav) Mode, Depending On An External Sensor (Co 2 , Temperature Or Relative Humidity) - S&P CADB-HE BASIC Series Manual

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.
9.4.4. Operation at Variable Airfl ow (VAV) mode, depending on an external sensor
(CO , temperature or relative humidity)
2
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.
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
Jumper position
Range
Setpoint
Offset reg. (+/-)
Alarm
Smin
Smax
Fan regulation
output
(0-10 VDC)
CO2
1 2
- 2000ppm
- 1100ppm
- 400ppm
- 1600ppm
- 2V
- 10V
SW4.3
OFF
ON
Temp. Hum. Rel.
3 4
50ºC 100%
25ºC 50%
2ºC 5%
28ºC 70%
2V 2V
10V 10V
COP motors confi guration
Supply master- Extract slave
Extract master- Supply slave
Sensor input
(0-10 V)
Control Not used
0-10V
desde BMS
5 6
10V
5V
2.5V
10V
2V
10V
Not used
7
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