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Access 5.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 |
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Variable |
Available options & Selection |
Note |
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Activation of fan control functions |
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Configuration > Functions > Function activation > |
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Fan control type |
...| Extract air fan pressure with supply air flow slave |… |
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Fan levels |
... | Low-Normal | ... |
Choice of fan levels to be used |
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Fan configuration |
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Configuration > Functions > Fan control |
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Fan |
| Supply air + Extract air | ... |
Choice of fan combination |
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Type of feedback supply air fan |
| None | Alarm | Run Indication | |
Function of the digital input of the fan feedback. Tripping of DI activates 3145 Malfunction SAF or 3150 Malfunction EAF |
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Type of feedback extract air fan |
| None | Alarm | Run Indication | |
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Flow calculation |
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Configuration > Functions > Fan control > Flow calculation supply air |
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K-factor |
[100] |
Check the fan label/datasheet for the right k-factor value. Flow calculation. |
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X-factor |
[0.5] |
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Configuration > Functions > Fan control > Flow calculation extract air |
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K-factor |
[100] |
Check fan the label/datasheet for the right k-factor value. Flow calculation. |
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X-factor |
[0.5] |
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PID settings |
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Configuration > PID controllers > Supply air fan |
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P-band |
[500] Pa |
PID settings of the supply air fan |
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I-time |
[60] s |
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D-time |
[0] s |
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Configuration > PID controllers > Extract air fan |
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P-band |
[1000] m3/h |
PID settings of the extract air fan |
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I-time |
[60] s |
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D-time |
[0] s |
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Interface to the fans and pressure transmitters |
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Configuration > I/O allocation settings > |
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Analog inputs > Pressure extract air |
Any available I/O |
Measuring of the extract air duct pressure |
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Analog inputs > Flow supply air |
Measuring of fan inlet cone pressure |
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Analog inputs > Flow extract air |
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Digital inputs > Feedback supply air fan |
Start, speed and feedback signals to hardwired fans. These IOs can stay unconfigured for modbus fans. |
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Digital inputs > Feedback extract air fan |
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Analog outputs > Supply air fan |
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Analog outputs > Extract air fan |
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Digital outputs > Supply air fan start |
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Digital outputs > Extract air fan start |
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Fan setpoints |
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Data & Settings > Fan control > Fan setpoints |
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Setpoint low speed extract air fan |
[250] Pa |
Change default setpoint values of the fan levels |
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Setpoint normal speed extract air fan |
[500] Pa |
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Slave factor |
[1.0] |
Adjusted if SAF has different characteristics then EAF |
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Operational settings |
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Data & Settings > Fan control > Supply air fan |
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Start delay |
[60] s |
Delay of fan start and stop at starting and stopping of the unit |
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Stop delay |
[180] s |
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Outdoor air damper stop delay |
[0] s |
Damper closing delay for avoiding over-pressure at fan stop |
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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 |
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Data & Settings > Fan control > Extract air fan |
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Start delay |
[0] s |
Delay of fan start and stop at starting and stopping of the unit |
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Stop delay |
[30] s |
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Exhaust air damper stop delay |
[0] s |
Damper closing delay for avoiding over-pressure at fan stop |
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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 |
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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 |
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Run schedule |
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Time settings > Schedule |
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Fan Low Speed |
> |
Run schedule for each fan level |
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Fan Normal Speed |
> |
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