22-82 Work Point Calculation
Option:
Function:
which will also include the System design Working
Point A.
Set point
Control Curve
n
DE
SIG
N
-f
D
ES
IG
N
n
RA
TE
D
-f
RA
TE
D
(head)
H
H
RATED
Par.
22-88
Q
DESIGN
Par.
22-89
H
MIN
D
B
C
A
Q
RATED
Par.
22-90
(flow)
Q
H
DESIGN
130BA387.11
22-84/
22-87
22-83/
Par.:
[0]
*
Disabled
Disabled [0]
: Work Point Calculation not active. To be
used if speed at design point is known (see table
above).
[1] Enabled
Enabled [1]
: Work Point Calculation is active.
Enabling this parameter allows the calculation of the
unknown System Design Working Point at 50/60 Hz
speed, from the input data set in
,
22-87 Pressure at No-Flow Speed
,
and
.
22-83 Speed at No-Flow [RPM]
Range:
Function:
Size related
*
[0 - par. 22-85 RPM]
22-84 Speed at No-Flow [Hz]
Range:
Function:
Size related
*
[0.0 - par. 22-86 Hz]
22-85 Speed at Design Point [RPM]
Range:
Function:
Size related
*
[par. 22-83 - 60000. RPM]
22-86 Speed at Design Point [Hz]
Range:
Function:
Size related
*
[par. 22-84 - par. 4-19 Hz]
22-87 Pressure at No-Flow Speed
Range:
Function:
0.000
*
[0.000 - par.
22-88 ]
Enter the pressure H
MIN
corresponding to Speed at No Flow in
Reference/Feedback Units.
Please also see
point D.
22-88 Pressure at Rated Speed
Range:
Function:
999999.999
*
[par. 22-87 -
999999.999 ]
Enter the value corresponding
to the Pressure at Rated Speed,
in Reference/Feedback Units.
This value can be defined using
the pump datasheet.
Please also see
point A.
22-89 Flow at Design Point
Range:
Function:
0.000
*
[0.000 - 999999.999 ] Enter the value corresponding to
the Flow at Design Point. No units
necessary.
Please also see
point C.
22-90 Flow at Rated Speed
Range:
Function:
0.000
*
[0.000 -
999999.999 ]
Enter the value corresponding to
Flow at Rated Speed. This value can
be defined using the pump
datasheet.
Parameter Description
VLT
®
HVAC Drive Programming Guide
152
MG.11.CB.02 - VLT
®
is a registered Danfoss trademark
3
3
