|
Access 4.x |
Fan control Type: Extract air fan pressure with supply air flow slave (configuration example) |
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. |
||
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: