Wiring
Read this entire section, including the information on
emissions compliance, before wiring the
VFD66 control. Follow these guidelines when wiring
the VFD66 control:
!
WARNING: Risk of Electric Shock.
Disconnect the power supply before making
electrical connections. The printed circuit board and
its components are at AC line voltage. Contact with
components carrying hazardous voltage can cause
electric shock and may result in personal injury or
death.
•
Use copper conductors only.
•
Size field wiring based on 75
°
C.
Accessing the Interior
Remove the terminal access cover (Figure 2) to
access terminal blocks, jumper blocks, and internal
potentiometers (Figure 3).
!
WARNING: Risk of Electric Shock.
To avoid possible electric shock, wait at least 5
minutes after AC supply power has been
disconnected from the VFD66 control before
servicing the device. The VFD66 Condenser Fan
Speed Control remains electrically charged for a
period of time after power is removed. Failure to wait
until the VFD66 control fully discharges could cause
electric shock, personal injury, or death.
NEMA 1 Enclosure
Follow these steps to remove the terminal cover:
1. Remove the terminal cover screw and push
downward on the ventilation holes.
2. Pull outward on the top of the terminal access
cover.
J7 J8
TB3
1 2 3 4
TB1
L3 L2 L1
TB2
P1
T1 T2 T3
J5 J6 J2 J3 J4 J9
Circuit
Board
(cropped
view)
Conduit
Entry
Bracket
Potentiometers
P2
Jumper
Blocks
for
Adjusting
VFD66
Control
Jumper Blocks for
Input Device Selection
Ground
Connection Terminals
Route wiring from input devices
through this conduit entry hole.
Input
Device
AC
Power
Input
Output
to
Fan
Motor
!
CAUTION: Risk of Property Damage.
Do not run low voltage cable in the same conduit or
wiring troughs with high voltage wires. Running low
and high voltage wires in the same conduit or wiring
troughs may damage the equipment or cause
system malfunction.
Figure 3: Jumper Block, Terminal Block, and
Potentiometer Locations
VFD66 Series Condenser Fan Speed Controls Product/Technical Bulletin
3
