Configuration of "Extract air fan pressure with supply air flow slave" control type


Variable

Available options & Selection

Note


Activation of fan control functions


Configuration > Functions > Function activation >


Fan control type

...| Extract air fan pressure with supply air flow slave |…



Fan levels

... | Low-Normal | ...

Choice of fan levels to be used


Fan configuration

Configuration > Functions > Fan control

Fan

| Supply air + Extract air | ...

Choice of fan combination

Type of feedback supply air fan

| None | Alarm | Run Indication |

Function of the digital input of the fan feedback. Tripping of the digital input activates the alarm "AL-1" or "AL-6"

Type of feedback extract air fan

| None | Alarm | Run Indication |


Flow calculation

Configuration > Functions > Fan control > Flow calculation supply air

K-factor

[100]

Check the fan label/datasheet for the right k-factor value. Flow calculation.

X-factor

[0.5]

Configuration > Functions > Fan control > Flow calculation extract air

K-factor

[100]

Check fan the label/datasheet for the right k-factor value. Flow calculation.

X-factor

[0.5]


PID settings

Configuration > PID controllers > Supply air fan

P-band

[500] Pa

PID settings of the supply air fan

I-time

[60] s

D-time

[0] s

Configuration > PID controllers > Extract air fan

P-band

[1000] m3/h

PID settings of the extract air fan

I-time

[60] s

D-time

[0] s


Interface to the fans and pressure transmitters

Configuration > I/O allocation settings >

Analog inputs > Pressure extract air

Any available I/O

Measuring of the extract air duct pressure

Analog inputs > Flow supply air

Measuring of fan inlet cone pressure

Analog inputs > Flow extract air

Digital inputs > Feedback supply air fan

Start, speed and feedback signals to hardwired fans.

These IOs can stay unconfigured for modbus fans.


Configuration of modbus fans

Digital inputs > Feedback extract air fan

Analog outputs > Supply air fan

Analog outputs > Extract air fan

Digital outputs > Supply air fan start

Digital outputs > Extract air fan start


Fan setpoints

Data & Settings > Fan control > Fan setpoints

Setpoint low speed extract air fan

[250] Pa

Change default setpoint values of the fan levels

Setpoint normal speed extract air fan

[500] Pa

Slave factor

[1.0]

Adjusted if SAF has different characteristics then EAF


Operational settings

Data & Settings > Fan control > Supply air fan

Start delay

[60] s

Delay of fan start and stop at starting and stopping of the unit

Stop delay

[180] s

Outdoor air damper stop delay

[0] s

Damper closing delay for avoiding over-pressure at fan stop

Min flow for supply air fan indication

[500] m3/h

Minimal flow of the fan to indicate that it is running. Otherwise "AL-1 Malfunction supply air fan" is triggered

Data & Settings > Fan control > Extract air fan

Start delay

[0] s

Delay of fan start and stop at starting and stopping of the unit

Stop delay

[30] s

Exhaust air damper stop delay

[0] s

Damper closing delay for avoiding over-pressure at fan stop

Min pressure for extract air fan indication

[25] Pa

Minimal pressure in the duct to indicate that the fan is running. Otherwise "AL-6 Malfunction extract air fan" is triggered

Min flow for extract air fan indication

[500] m3/h

Minimal flow of the fan to indicate that it is running. Otherwise "AL-6 Malfunction extract air fan" is triggered


Run schedule

Time settings > Schedule

Fan Low Speed

>

Run schedule for each fan level

Fan Normal Speed

>


Related topics:

Fan control type