User Manual

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SED2 variable speed drives –
all the features you could want
for HVAC applications
Onboard kWh meter
The SED2 variable speed drives have an integrated kWh
meter that is displayed via the keypad. The meter can
be reset to start metering predefined by the user.
Belt failure detection with or without sensor
The SED2 ensure reliable V-belt monitoring without the
expense of an external sensor. Both speed and torque
are compared with a user-defined tolerance band. If the
parameters do not match, the SED2 trip in the event of
V-belt failure.
EMC filter of class B
The entire range of SED2 variable speed drives feature
EMC filters that comply with the requirements for con-
ducted radio-frequency emissions used in the first envi-
ronment/category C1 according to EN 61800-3 (equiva-
lent to EN 55011 class B). Thus, SED2 are suited for use
in residential, business, and commercial areas.
Staging pumps and fans
This function allows for the control of up to 2 additional
staging pumps or fans. With the 2 relay contacts, the SED2
perform the staging logic without any requirement or
expense of additional controllers or I/O cards.
Operation in case of an emergency/fire
In this operating mode, the SED2 ignore internal alarm
and fault messages to keep up the operation of fans as
long as possible. This ensures an exact overpressure in a
stairway. Escape routes stay free of smoke and doors can
be opened easily.
Bypass control
Bypass control ensures high availability of the applica-
tion. This function is activated either automatically or by
a digital input. In addition, to save even more energy, the
SED2 changes to bypass mode if the motor runs at mains
frequency for a preselected period of time.
Basic Operator Panel BOP
The BOP included as standard is fully removable and in-
terchangeable with all frame sizes. The 5-digit LCD clearly
displays if the hand or auto functions have been selected
on the keypad. Push button speed control and intuitive
10-step commissioning make the SED2 the easiest variable
speed drives on the market to program.
Advanced Operator Panel AOP as an option
The AOP offers the following in addition to the function-
ality of the BOP:
– Unique 10 parameter set storage with full uploading/
downloading capability
– Multilingual and multiline clear text display
– Plain language commentary and diagnostics menu
– Seven-days timer function with three switching
operations per day
– Mulitdrop capability to control 32 SED2 with one AOP
Direct connection of an LG-Ni 1000 sensor for
temperature control
Direct connection of the LG-Ni 1000 temperature sensor
offers a low-cost temperature control loop solution. The
built-in PID controller is optimized for HVAC applications.
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Hibernation mode
Hibernation mode starts and stops the SED2 automatically
on demand. This enables greater energy savings and control
by stopping the SED2 if it runs at a user-defined minimum
speed for a given time. If demand is low, more energy can
be saved. If the demand increases, the SED2 switch on
automatically.
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