Danfoss vlt aqua Operating Instructions

[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
par. 22-83 Speed at No-Flow [RPM] par. 22-84 Speed at No-Flow [Hz] , par. 22-87 Pressure at No-
Flow Speed , par. 22-88 Pressure at Rated Speed , par. 22-89 Flow at Design Point and
par. 22-90 Flow at Rated Speed .
22-84 Speed at No-Flow [Hz]
Range: Function:
Application
dependent*
[Application dependant] Resolution 0.033 Hz.
The speed of the motor at which flow has effectively stopped and minimum pressure H
MIN
is achieved
should be entered here in Hz. Alternatively, the speed in RPM can be entered in par. 22-83 Speed
at No-Flow [RPM] . If it has been decided to use Hz in par. 0-02 Motor Speed Unit then
par. 22-86 Speed at Design Point [Hz] should also be used. Closing the valves and reducing the
speed until minimum pressure H
MIN
is achieved will determine this value.
22-85 Speed at Design Point [RPM]
Range: Function:
Application
dependent*
[Application dependant] Resolution 1 RPM.
Only visible when par. 22-82 Work Point Calculation is set to Disable . The speed of the motor at
which the System Design Working Point is achieved should be entered here in RPM. Alternatively,
the speed in Hz can be entered in par. 22-86 Speed at Design Point [Hz] . If it has been decided to
use RPM in par. 0-02 Motor Speed Unit then par. 22-83 Speed at No-Flow [RPM] should also be
used.
22-86 Speed at Design Point [Hz]
Range: Function:
Application
dependent*
[Application dependant] Resolution 0.033 Hz.
Only visible when par. 22-82 Work Point Calculation is set to Disable . The speed of the motor at
which the System Design Working Point is achieved should be entered here in Hz. Alternatively, the
speed in RPM can be entered in par. 22-85 Speed at Design Point [RPM] . If it has been decided to
use Hz in par. 0-02 Motor Speed Unit , then par. 22-83 Speed at No-Flow [RPM] should also be used.
22-87 Pressure at No-Flow Speed
Range: Function:
0.000 N/A* [Application dependant] Enter the pressure H
MIN
corresponding to Speed at No Flow in Reference/Feedback Units.
Please see also par. 22-82 Work Point Calculation point D.
6 How to Programme the Low Harmonic Drive
VLT AQUA Low Harmonic Drive Operating In-
structions
118 MG.20.T1.02 - VLT
®
is a registered Danfoss trademark
6

Danfoss vlt aqua Specifications

General

Supply Voltage	200-240V, 380-500V, 525-600V
Enclosure	IP20
Features	Energy optimization
Approvals	CE, UL, cUL
Input Voltage Range	200-240V, 380-500V, 525-600V
Output Voltage Range	0 to supply voltage
Protection Features	Overvoltage, Undervoltage, Overcurrent, Short circuit, Ground fault
Communication Interfaces	PROFIBUS
Cooling Method	Air-cooled