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Access 4.x |
Fan setpoint compensation configuration example |
This type of sequence allows compensation of the actual fan setpoint in relation to the heating/cooling demand. The actual fan setpoints can either be decreased or increased.
The extent of the compensation is linear from "0" to "Max fan compensation". The compensation follows the output of the sequence and "Max fan compensation" is reached once output of the sequence is 100%.
The variable "Max fan compensation" has no units, meaning that default value of [100] will have different effect in different fan control types.
e.g.:
Fan control type: Pressure. Maximum fan compensation of [100] would add to the actual fan setpoints -100Pa (for decreasing compensation) or +100Pa (for increasing compensation).
Fan control type: Flow. Maximum fan compensation of [100] would add to the actual fan setpoints -100m3/h (for decreasing compensation) or +100m3/h (for increasing compensation).
Fan control type: Manual. Maximum fan compensation of [100] would add to the actual fan setpoints -100% (for decreasing compensation) or +100% (for increasing compensation).
Fan setpoint compensation |
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Variable |
Available options & Selection |
Note |
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Sequence selection |
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Configuration > Functions > Function activation > Heating/Cooling sequence setup |
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Sequence for heating |
|...| SEQ-F Fan setpoint compensation |...| |
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Sequence settings |
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Configuration > Functions > Function activation > Heating/Cooling sequence setup > Fan setpoint compensation |
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Type of sequence |
|Cooling | Exchanger | Heating | Damper | | Fan setpoint compensation | |
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Type of setpoint compensation |
| Decreasing | Increasing | |
Decreasing - the fan setpoint is reduced once sequence is active Increasing - the fan setpoint is increased once sequence is active |
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Digital start output |
| No | Yes | |
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Sequence output when recirculation/support |
| 0% | 100% | Auto | |
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Sequence output min limit |
0% |
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Sequence output max limit |
100% |
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Sequence output when the unit is stopped |
0% |
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PID Settings |
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Configuration > PID controllers > Fan setpoint compensation |
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P-band |
[10] oC |
PID settings for the sequence |
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I-time |
[100] s |
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D-time |
[0] s |
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Compensation limit |
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Data & Settings > Temperature control > Fan setpoint compensation |
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Max fan compensation |
[100] |
The decrease/increase in the units the fan setpoint (Pa | m3/h | % ) |
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Overview |
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Data & Settings > Operation overview > Fans |
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Actual setpoint compensation (supply air fan) |
__ (Pa | m3/h | %) |
Actual compensation |
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Actual setpoint compensation (extract air fan) |
__ (Pa | m3/h | %) |
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Chapter info
Last reviewed: 11/29/2021
Access version: 4.6-0-14 (3045)