Danfoss vlt aqua Programming Guide

makes staging and destaging as fast as possible; the variable
speed pump is just cut out (coasted).
Slow [0]: At alternation, the variable speed pump is ramped up
to maximum speed and then ramped down to a stand still.
Quick [1]: At alternation, the variable speed pump is ramped up
to maximum speed and then coasted to stand still.
The below examples show Alternation in both Quick and Slow
configurations.
Illustration 2.2: Slow Configuration
Illustration 2.3: Quick Configuration
25-58 Run Next Pump Delay
Range: Function:
0.5 sec
*
[Par.25-58 – 5.0 sec] This parameter is only active if the option selected in Lead Pump
Alternation
, par. 25-50, is different from Off [0].
This parameter sets the time between stopping the old variable
speed pump and starting another pump as a new variable speed
pump. Refer to
Staging Mode at Alternation , par. 25-56, and
Figure 7-5 for description of staging and alternation.
25-59 Run on Mains Delay
Range: Function:
0.5 sec
*
[Par. 25-58 – 5.0 sec ] This parameter is only active if the option selected in Lead Pump
Alternation
, par. 25-50, is different from Off [0].
This parameter sets the time between stopping the old variable
speed pump and starting this pump as a new fixed speed pump.
2. Parameter Description VLT
®
AQUA Drive Programming Guide
240 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