Danfoss VLT Programming Manual page 213

®
VLT HVAC Drive Programming Guide
NB!
When flow compensation is used with the Cascade Controller (parameter group 25-**), the actual set-point will not depend on speed
(flow) but on the number of pumps cut in. See below:
There are two methods which can be employed, depending upon whether or not the Speed at System design Working Point is known.
Parameter used
Flow Compensation, 22-80
Square-Linear Curve Approximation, 22-81
Work Point Calculation, 22-82
Speed at No Flow, 22-83/84
Speed at Design Point, 22-85/86
Pressure at No Flow, 22-87
Pressure at Rated Speed, 22-88
Flow at Design Point, 22-89
Flow at Rated Speed, 22-90
22-80 Flow Compensation
Option:
[0] * Disabled
[1] Enabled
Speed at
Design Point
KNOWN
+
+
+
+
+
+
-
-
-
Function:
[0] Disabled : Set-Point compensation not active.
Enabled
[1] :Set-Point compensation is active. Enabling this parameter allows the Flow Compensated
Setpoint operation.
MG.11.C9.02 - VLT ® is a registered Danfoss trademark
3 Parameter Description
Speed at
Design Point Cascade Controller
UNKNOWN
+
+
+
+
-
+
+
+
+
3
+
-
-
-
-
+
-
-
-
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