Danfoss vlt aqua Programming Guide

25-44 Staging Speed [RPM]
Option: Function:
0 N/A Readout of the below calculated value for Staging Speed When
adding a fixed speed pump, in order to prevent an overshoot of
pressure, the variable speed pump ramps down to a lower
speed. When the variable speed pump reaches the “Staging
Speed” the fixed speed pump is staged on. Staging Speed cal-
culation is based on
Staging Threshold , par. 25-42, and Motor
Speed High Limit [RPM]
, par. 4-13.
Staging Speed is calculated with the following formula:
η
STAGE
= η
HIGH
η
STAGE %
100
where n
HIGH
is Motor Speed High Limit and n
STAGE100%
is the val-
ue of Staging Threshold.
25-45 Staging Speed [Hz]
Option: Function:
0 N/A Readout of the below calculated value for Staging Speed When
adding a fixed speed pump, in order to prevent an overshoot of
pressure, the variable speed pump ramps down to a lower
speed. When the variable speed pump reaches the “Staging
Speed” the fixed speed pump is staged on. Staging Speed cal-
culation is based on
Staging Threshold , par. 25-42, and Motor
Speed High Limit [Hz]
, par. 4-14.
Staging Speed is calculated with the following formula:
η
STAGE
= η
HIGH
η
STAGE %
100
where n
HIGH
is Motor Speed
High Limit and n
STAGE100%
is the value of Staging Threshold.
25-46 Destaging Speed [RPM]
Option: Function:
0 N/A Readout of the below calculated value for Destaging Speed.
When removing a fixed speed pump, in order to prevent an un-
dershoot of pressure, the variable speed pump ramps up to a
higher speed. When the variable speed pump reaches the “De-
staging Speed” the fixed speed pump is destaged. Destaging
Speed is calculated based on
Destaging Threshold , par. 25-43,
and
Motor Speed High Limit , par. 4-13.
Destaging Speed is calculated with the following formula:
2. Parameter Description VLT
®
AQUA Drive Programming Guide
236 MG.20.O2.02 - VLT
®
is a registered Danfoss trademark
2

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