Danfoss vlt aqua Programming Guide

If no flow is detected, the frequency converter will increase the set point for pressure to ensure
a slight over pressure in the system (boost to be set in par. 22-45,
Setpoint Boost ).
The feedback from the pressure transducer is monitored and when this pressure has dropped with
a set percentage below the normal set point for pressure (Pset), the motor will ramp up again and
pressure will be controlled for reaching the set value (Pset).
2) In systems where the pressure or temperature is controlled by an external PI controller, the
wake up conditions can not be based on feedback from the pressure/temperature transducer as
the setpoint is not known. In the example with a boost system, desired pressure Pset is not known.
Par. 1-00,
Configuration mode , must be set for Open Loop.
Example: Boost system.
2. Parameter Description VLT
®
AQUA Drive Programming Guide
202 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