Application Examples; Selected Application Features; Smartstart - Danfoss VLT Refrigeration Drive FC 103 Design Manual

Application Examples

4 Application Examples
4.1 Application Examples
®
The VLT Refrigeration Drive FC 103 is designed for refrig-
eration applications. The wide range of standard and
optional features includes optimised SmartStart:
•
Motor alternation
The motor alternation functionality is suitable for
applications (for example fan or pump
applications) with 2 motors sharing 1 frequency
converter.
NOTICE
Do not use the motor alternation with compressors.
•
Pack control
Basic pack control is built in as standard with a
capacity of up to 3 compressors. Pack control
provides speed control of a single compressor in
a compressor pack. For control of up to 6
compressors, use the VLT
MCB 113.
•
Floating condensing temperature control
Saves money by monitoring the outdoor
temperature and allowing the condensing
temperature to be as low as possible, which
reduces fan speed and energy consumption.
•
Oil return management
Oil return management improves reliability and
lifetime of the compressor and ensures proper
lubrication, by monitoring the variable speed
compressor. If it has been running for a certain
time, it picks up speed to return oil to the oil
reservoir
•
Low and high pressure monitoring
Saves money by reducing the need for onsite
resets. The frequency converter monitors the
pressure in the system, and if pressure reaches a
level close to the level that engages the
shutdown valve, the frequency converter makes a
safe shutdown, and restart shortly after.
•
STO
STO enables Safe Torque Off (coast) when a
critical situation occur.
•
Sleep mode
The sleep mode feature saves energy by stopping
the pump when there is no demand.
•
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.
MG16G202
Design Guide
®
Extended Relay Card
Danfoss A/S © 08/2015 All rights reserved.

4.2 Selected Application Features

4.2.1 SmartStart

For setting up the frequency converter in the most
efficient and logical way, the text and language used in
the frequency converter make complete sense to the
engineers and installers in the field of refrigeration. To
make the installation even more efficient, the built-in Set-
up wizard menu guides the user through the set-up of the
frequency converter in a clear and structured manner.
The following applications are supported:
•
Multi-compressor control.
•
Multi-condenser fan, cooling tower/evaporative
condensing.
•
Single fan and pump.
•
Pump system.
The feature is activated at the first power-up, after a
factory reset, or from the quick menu. When activating the
wizard, the frequency converter asks for the information
needed to run the application.
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