TB3
1
V
I
S
N
V
D
C
C
2
4
V
A350P Control
or P352PN Control
Second A350P Control
or P352PN Control
(if used)
2
4
C: Common (-)
V: 0-10 VDC Output
3
Figure 6: Wiring A350P Controls
or P352PN Controls to
VFD66 Terminal Block 3
Wiring an External Alarm to a VFD66 Control
Some models of the VFD66 controls feature an alarm
output. The Metal Oxide Silicon Field Effect Transistor
(MOSFET) alarm output activates when a permanent
fault condition occurs. See Table 12, Figure 3, and
Figure 7.
Visual
or Audible
External Alarm
Device
Alarm output
is rated for 100 mA
at 30 VDC/24 VAC.
2
1
24VAC/30 VDC
VFD66 Control
Terminal Block T 4
B
Figure 7: Wiring the Alarm Output
Wiring VFD66 Input and Output Power
Select wire size for field wiring based on a wire
insulation temperature resistance rating of 167
°
F
(75
°
C), with a maximum wire size of 12 AWG. Use
only stranded copper wire, rated for at least 600 volts.
Maximum terminal tightening torque for all VFD66
controls electrical terminals is 5 lb·in (0.565 N·m).
Ensure that the motor(s) and VFD66 control are
securely and adequately grounded. Use the two
ground connection terminals on the conduit entry
bracket. (See Figure 3.) Use a ground connection
terminal similar to AMP Part Number 34162 for
16-14 AWG wire size or AMP Part Number 322455 for
12-10 AWG wire size.
Wiring Input Power
!
CAUTION: Risk of Property Damage.
Ensure that the power source conforms to the
requirements of the equipment. Failure to use a
correct power source may result in permanent
damage to the equipment.
IMPORTANT:
Wiring line-voltage input power to the
wrong terminal block will damage the VFD66 control.
Wire input power ONLY to Terminal Block 1 (TB1).
The input line-voltage supply power to L1, L2, and L3
(Terminal Block 1) must be fused. Use fuses sized for
250% of the input current rating of the VFD66 control.
For example, if a VDF66 control is rated at 4 amperes
input current, use a 10-ampere fuse. Do not use fuses
with an extremely fast-opening characteristic (rectifier
fuses).
Wiring Output Power
IMPORTANT:
The output phase rotation on TB2 at
T1(U), T2(V), T3(W) is ABC. If the motor rotation is
incorrect, interchange any two motor leads on TB2.
Do not make changes to the input power supply
wiring.
The length of output power wires between the
VFD66 control (TB2) and the motor must not exceed
50 ft (15 m).
Emissions Compliance
If the VFD66 control is used in commercial or
residential applications, FCC and DOC compliance
may require the addition of the items in Table 3 to
reduce electronic noise emissions. Installation of the
parts listed is required for EU Directive Compliance
(CE mark):
•
72/23/EEC (Low Voltage Directive)
•
89/336/EEC (EMC Directive)
VFD66 Series Condenser Fan Speed Controls Product/Technical Bulletin
5
