Danfoss VLT HVAC Drive FC 102 Manuale di istruzioni per l'installazione - Pagina 7

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Danfoss VLT HVAC Drive FC 102 Manuale di istruzioni per l'installazione

1. Installation Instructions

Installation Instructions

Parameter Configuration

After PTU 025 is installed, power up the frequency converter.

The LCP shows alarm A80, Drive initialized, which indicates that

the frequency converter detected the new device. Press [Reset]

to reset the alarm.

Illustration 1.8 Alarm A80, Drive Initialized

Use the LCP or MCT 10 Set-up Software to configure PTU 025.

The PTU 025 option can be configured for the following

purposes:

•

Monitoring of the pressure transmitter signals.

•

Showing the readouts on the LCP or transmitting

them via the fieldbus.

•

Integration of the pressure monitoring into a system

solution.

•

PID closed-loop control based on airflow or pressure

levels.

Signals from all PTU 025 sensors are active all the time and

the frequency converter can show the values on the LCP

continuously. Use parameters in parameter group 31-2*

Readouts to monitor filters, airflow, and pressure levels on the

LCP or configure warnings or alarms. Values in parameter

group 31-2* Readouts are also available via the fieldbus.

MCT 10 Set-up Software and the frequency converter check

whether the entered pressure values are within the operating

ranges of sensors. The LCP shows a warning if the entered

pressure value is outside the operating range.

Use parameter 31-30 Press Sens Cmp State in the smart logic

control to achieve application-specific functionality. Use

parameters in parameter group 13-9* User-defined Alerts and

Readouts to configure application-specific messages, warnings,

and alarms. For more information, see the programming guide.

MI08A102

Pressure Transmitter Unit PTU 025

VLT

HVAC Drive FC 102

31-** Pressure Sensor Option

Parameters related to the PTU 025 option.

31-2* Configuration

Each pressure-related status has its own below-level and

above-level trigger thresholds. The thresholds can be activated

individually. When the actual pressure level exceeds the

threshold level, the frequency converter waits for the value in

parameter 31-23 On Delay Time, and then performs a status

change of a status. When the actual pressure goes below the

threshold level, the value in parameter 31-24 Reset Delay Time

defines when the status is reset. The value in

parameter 31-25 Pressure filter time constant adjusts the

dynamic of the reaction to the actual pressure input, to ensure

reliable and stable status generation.

31-20 Pressure/Speed Curve

Select the type of the pressure/speed curve.

Each pressure sensor can have a different setting.

For options [1] Linear and [2] Square root, the pressure threshold

at 0 speed equals 10% of the value entered in

parameter 31-21 Below level threshold or parameter 31-22 Above

level threshold.See Illustration 1.9.

Illustration 1.9 Pressure/Speed Dependency

Option:

[0]

[1]

[2]

31-21 Below level threshold

Range:

[ -2500 - 2500 Pa]

Function:

None

The pressure threshold is

constant and does not

depend on speed.

Linear

The pressure threshold is

proportional to the speed.

Square root

The pressure threshold

depends on the speed.

The dependency is

quadratic.

Function:

Enter the below-level threshold.