Product/Technical Bulletin
VFD66
Issue Date
January 5, 2010
© 20
10
Johnson Controls, Inc.
1
VFD66 Series Condenser Fan Speed Controls
The VFD66 Series Condenser Fan Speed Controls
regulate the speed of three-phase condenser fan
motors in refrigeration and Heating, Ventilating, and
Air Conditioning (HVAC) systems by varying the
frequency and voltage of the power supplied to the
motor.
The VFD66 control accepts an input signal from the
P35 Pressure Transducer, P499 Electronic Pressure
Transducer, System 350
™
controls, or any other
device that provides a 0-5 VDC or 0-10 VDC analog
output signal.
The application-specific design of the VFD66 control
provides a simple interface, which makes the control
easy to understand and operate.
Figure 1: VFD66 Condenser Fan Speed Control
with NEMA 1 Enclosure
Features and Benefits
Isolated Input Circuitry
Permits application with 0-5 VDC or 0-10 VDC
controllers, sensors, transducers, and
Johnson Controls System 350 controls
Simultaneous Acceptance
of Two Similar Inputs
Allows use on dual refrigeration circuits
cooled by a single fan
Compact Design
Provides installation ease and flexibility
Three-Phase, 208/230, or
400/460 VAC Models
Handle three-phase motors ranging up to
10.6 amperes at 208/230 VAC or 5.5 amperes
at 400/460 VAC
Few End-User Settings
Provide fast and easy installation and setup
Code No. LIT-125467
www.johnsoncontrols.com
Part No. 24-7664-1555, Rev. F
