Flow
=
Duct
Area
×
Dynamic
Pressure
×
Air
Density
Factor
See also par. 20-34
Duct 1 Area [m2]
through par. 20-38
Air Density Factor [%]
for setting of duct
area and air density.
[4]
Velocity to flow
Velocity to flow is used in applications where the air flow in a duct is to be controlled. The feedback
signal is represented by an air velocity measurement.
Flow
=
Duct
Area
×
Air
Velocity
See also par. 20-34
Duct 1 Area [m2]
through par. 20-37
Duct 2 Area [in2]
for setting of duct area.
20-03 Feedback 2 Source
Option:
Function:
See par. 20-00
for details.
[0] *
No function
[1]
Analog input 53
[2]
Analog input 54
[3]
Pulse input 29
[4]
Pulse input 33
[7]
Analog input X30/11
[8]
Analog input X30/12
[9]
Analog Input X42/1
[10]
Analog Input X42/3
[11]
Analog Input X42/5
[100]
Bus feedback 1
[101]
Bus feedback 2
[102]
Bus feedback 3
20-04 Feedback 2 Conversion
Option:
Function:
See par. 20-01
for details.
[0] *
Linear
[1]
Square root
[2]
Pressure to temperature
[3]
Pressure to flow
[4]
Velocity to flow
20-06 Feedback 3 Source
Option:
Function:
See par. 20-00
for details.
[0] *
No function
[1]
Analog input 53
[2]
Analog input 54
[3]
Pulse input 29
[4]
Pulse input 33
[7]
Analog input X30/11
[8]
Analog input X30/12
[9]
Analog Input X42/1
6 How to Program the Low Harmonic Drive
VLT HVAC Low Harmonic Drive Instruction
Manual
6-32
MG.16.A1.22 - VLT
®
is a registered Danfoss trademark
6