Product Overview

Connecting with
crossover cable
Connecting
with LAN cable
Efficiency as the Basis of Design
The ECM based design combines
a brushless electronically commu-
tated synchronous motor with a
strong permanent magnet rotor. An
ECM motor does not consume any
energy in order to magnetize the
rotor and the position of the mag-
netic poles of the rotor and stator
generate continuous thrust in the
rotating direction of the rotor. The
integral electronics
precisely drive the
rotor as fast as the
rotating ux, sig-
nicantly reducing
motor eciency
losses while greatly
increasing starting
torque.
Full Variable Speed Control
Matches System Requirements
The electronics continually change
the power adjustment (speed) to
match the requirements of the
system. Because the electrical
motor is being driven by an on-
board frequency converter with an
integrated PFC lter the supplied
electric current is rectied and
converted into the appropriate
shape to maximize
energy eciency,
even when operat-
ing at hydraulic
partial load condi-
tions. The superior
motor eciency,
optimized speed
control, and intel-
ligent sensorless
variable speed
pump control deliv-
ers dramatic cost
savings over the life
of the system.
Flexibility to Fit the Job
The hydraulic characteristics of the
pump can be set at will. Pump
regulation can be done by pressure,
speed, electrical power or a combi-
nation of these, so it can be adapt-
ed to dierent hydraulic systems
requirement without the need for
external regulators or sensors.
Ready-to-go out of the box, the
Viridian will automatically adjust its
speed based on internally sensed
variable dierential pressure control,
providing optimal energy savings
across the industry’s largest oper-
ating range. Additional modes of
control can be selected to provide
constant pressure control, propor-
tional pressure control, constant
curve duty (uncontrolled pump),
RPM regulation or power limitation
control.
The Viridian pumps can be operated
as single or parallel variable speed
pumps. The onboard electronics
allows the user to choose to run
dual pumps in parallel, standby or
alternating modes. The built-in nor-
mally open, common and normally
closed relay contacts can be used
to activate or deactivate a primary
or secondary pump contact, actu-
ate a damper for combustion air or
switch another piece of equipment.
In addition, the Viridian comes stan-
dard with 2 external digital inputs
and 1 external digital output to be
available for additional mechanical
room control.
A convergence of efficiency, simplicity and technology; Taco introduces a new generation of wet rotor circulators
Up to 80%
Electrical
Savings
The position of the magnetic poles
of the rotor and stator generate
continuous thrust in the rotating
direction of the rotor.
Continuous Commutation