Extraction arm, pressure sensor and flow coefficient (ExtrcEqp13)

ExtrcDiffP "Extraction differential pressure"

On-board output,

Extraction differential pressure

0…10V

(Optional)
ExtrcSpSel "Extraction setpoint selector"

On-board output,

Extraction setpoint selector

Binary input

Extraction box coefficient

ExtrcBoxCoef

ACnfVal

1

Extraction setpoint 1

ExtrcSp1

ACnfVal

0
[m³/h]
[ft³/min]
[l/s]

Extraction setpoint 2

ExtrcSp2

ACnfVal

0
[m³/h]
[ft³/min]
[l/s]

Extraction setpoint 3 (not used)

ExtrcSp3 (not used)

Enable propagation air volume flow failure

Determines whether the system receives updates from the digital pressure sensor about airflow failures. If set to "No," the system assumes that the airflow is valid. Refer to the room pressure control application failure response and configuration.

EnPrpgAflFail

No

Switch-on point for differential pressure

Sets a minimum threshold for which the differential pressure sensor will show a measurement. Below this threshold, the measured value will be 0. Note that the sensor will continue to show a measurement for as long as it remains above the value determined by HysDiffP. See HysDiffP for examples.

SwiOnPtDiffP

0.2 Pa

0.001 [inWC]

Hysteresis for differential pressure

Hysteresis for differential pressure. Related to the Switch-on point for differential pressure (SwiOnPtDiffP). Once the system reaches the switch-on point, the differential pressure sensor returns a non-zero value. After differential pressure passes above SwiOnPtDiff, the HysDiffP parameter sets how far the pressure measurement can fall below the switch-on point (SwiOnPtDiff), and still return a non-zero value. Note that the differential pressure measurement must first pass above the value set by SwiOnPtDiff before HysDiffP becomes active.

This parameter must be in units compatible with SwiOnPtDiffP.

HysDiffP

0.1 Pa

0.000 [inWC]

Time constant for air volume flow

The time constant for the attenuation filter on the air volume flow sensor. Larger values help to stabilize fluctuating air volume flow sensor values. Larger values for this constant also cause the values reported by the air volume flow sensor to be more heavily weighted toward measurements in the past. Leaving at 0 disables the filter.

TiConAirFl

0 [s]

Switch delay for tracking method to air volume flow

If the tracking method switches from the setpoint to airflow (see SwiTolTckMthd), this sets the amount of time to wait before making the switch.

SwiDlyTckMthd

6000 [s]

Switch tolerance for tracking method to air volume flow

Sets an acceptable level of difference (percentage) between the relative airflow setpoint and current relative airflow.

By default, the system tracking method follows the airflow setpoint. But if current relative airflow deviates from the relative setpoint by a percentage amount greater than what is set by the SwiTolTckMthd parameter, the system switches from tracking to the setpoint to tracking to the actual airflow.

Setting the tolerance level (SwiTolTckMthd) to 100% will not always prevent tracking from switching from setpoint to airflow.

SwiTolTckMthd

5 [%]

Nominal air volume flow

Represents the maximum expected airflow value when the damper is all the way open. To help normalize the airflow and the airflow setpoint for control purposes, the system will always pick the highest between AirFlNom and any other airflow configuration values.

AirFlNom

0 [m³/h]

0 [ft³/min]

0 [l/s]

Pressure unit

PUnit

Air volume flow unit

AirFlUnit