Danfoss VLT FC 102 Programming Manual page 512

Programming Guide | VLT® HVAC Drive FC 102
H (head)
Control curve
Figure 91: Square-Linear Curve Approximation
22-82 Work Point Calculation
Default value: [0] Disabled
Setup:
All setups
Data type: Uint8
H (head)
H DESIGN
Setpoint
HMIN
Par.:
22-83/
Control curve
22-84/
22-87
Figure 92: Example 1: Speed at Known System Design Working Point
From the datasheet showing characteristics for the specific equipment at different speeds, reading across from the H
the Q point allows finding point A, which is the system design working point. The pump characteristics at this point should be
DESIGN
identified and the associated speed programmed. Closing the valves and adjusting the speed until H
speed at the no-flow point to be identified. Adjustment of parameter 22-81 Square-linear Curve Approximation then allows the shape of
the control curve to be adjusted infinitely.
512 | © 2024.10
Q (flow)
Parameter type:
Conversion index:
Change during operation:
A
Q (flow)
Parameter Descriptions
Option
–
True
point and
DESIGN
has been achieved allows the
MIN
AU430028034214en-001901 / 130R0310