Application Examples; Application Feature Overview; Selected Application Features; Smartstart - Danfoss VLT AQUA Drive FC 202 Design Manual

Application Examples

4 Application Examples

4.1 Application Feature Overview

®
The VLT AQUA Drive FC 202 is designed for water and
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wastewater applications. The wide range of standard and
optional features includes optimized SmartStart and quick
menu with a focus on water and wastewater applications:
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Cascade control
Basic cascade control is built-in as standard, with
a capacity of up to three pumps. Cascade control
provides speed control of a single pump in a
multi-pump system. This is a cost attractive
solution, for example for booster sets. Systems
with multiple variable-speed pumps require the
extended cascade controller (MCO 101) or the
advanced cascade controller (MCO 102).
•
Motor alternation
The motor alternation functionality is suitable for
applications with two motors or two pumps
sharing one adjustable frequency drive.
•
Flow compensation
Flow compensation adapts the setpoint according
to the flow and enables mounting of the pressure
sensor close to the pump.
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Dry-run detection
The feature prevents damage of the pump by
avoiding dry-running and pump overheat
•
End-of-curve detection
The feature detects when the pump is running at
maximum speed and the setpoint cannot be
reached for a user-defined time period.
•
Deragging
This preventive or reactive cleaning feature is
designed for pumps in wastewater applications.
See chapter 4.2.3 29-1* Deragging Function for
details.
•
Initial/final ramps
Programming of short ramp times to/from
minimum speed protects bearings, and ensures
sufficient cooling in applications with submersible
pumps.
•
Check valve protection
A slow ramp-down rate protects check valves and
prevents water hammering
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STO
STO enables safe stop (coast) when a critical
situation arises.
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®
VLT AQUA Drive FC 202
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4.2 Selected Application Features

4.2.1 SmartStart

With the SmartStart wizard, it is now easier and more cost-
efficient to commission the adjustable frequency drive.
SmartStart is activated at the first power-up or after a
factory reset and guides users through a series of easy
steps to ensure the correct and most efficient motor
control. The SmartStart can also be started directly via the
Quick Menu. Select settings on the 28-language graphical
control panel.
•
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Danfoss A/S © 09/2014 All rights reserved.
Low-flow detection
This feature detects no-flow or low-flow
conditions of the system.
Sleep mode
The sleep mode feature saves energy by stopping
the pump when there is no demand.
Pipe fill mode
Pipe fill mode comprises functionalities to fill
pipes smoothly and avoid water hammering. This
feature provides different modes for horizontal
and vertical pipes.
Real time clock
Smart logic control (SLC)
SLC comprises programming of a sequence
consisting of events and actions. SLC offers a
wide range of PLC functions using comparators,
logic rules and timers.
Pre/post Lube
See chapter 4.2.4 Pre/post Lube for details.
Flow confirmation
See chapter 4.2.5 29-5* Flow Confirmation for
details.
Advanced minimum speed monitoring for
submersible pumps
See chapter 4.2.6 Advanced Minimum Speed
Monitoring for Submersible Pumps for details.
Preventive maintenance
The preventive maintenance feature enables
programming of scheduled service intervals into
the adjustable frequency drive.
Single pump/motor in open-loop or closed-loop
Motor alternation: When two motors share one
adjustable frequency drive.
MG20N622