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MOUNTING
To satisfy safety agency requirements (UL, CSA, IEC,
VDE, CE), either of the following two installation
instructions must be followed:
Mounting P/N 180V800 (AC-VX board only)
Mount the unit in a non-conductive enclosure that will
inherently protect the user against accidental contact
with dangerous voltages.
OR
Mount the unit in a conductive enclosure with spacing of
1/4” (6.3 mm) between the circuit board and chassis
ground and 5/16” (8 mm) to any un-insulated secondary
circuits. The non-conductive enclosure must inherently
protect the user against accidental contact with
dangerous voltages.
Mounting P/N 180V800E (AC-VX in enclosure)
P/N 180V800E includes the AC-VX board mounted in a
NEMA 4X rated polycarbonate enclosure. Electrical
connections are made through three bottom entry holes
fitted with liquid tight strain reliefs. There is a separate
connection for line power, fan power, and control signal.
Mount the enclosure with the strain reliefs tightened and
pointing down.
WARNING: Dangerous voltages are present on the
circuit board when connected to the power line.
Power must be removed before making any
connections or adjustments to avoid electrical
shock or damage to the unit.
Power & Ground Connections
It is recommended that an adequately sized circuit
breaker be connected between the power service and
the AC-VX to permit fail-safe removal of power before
making adjustments or connections. A 15 Amp. Ceramic
fuse is supplied.
Line power and ground connections are made through
the LINE terminals on terminal block TB1 marked B (line
power, black wire), W (line power, white wire) and G
(ground, green wire). Number 14 AWG insulted wire
must be used for input power. Connect line power to
terminals B and W and earth ground to terminal G.
Connections are made by (1) stripping back ¼” (6 mm)
of wire insulation from the end of each power wire and
ground, (2) inserting the exposed wire from each line
under the screw clamp plate at each connection, and (3)
securely tightening down each screw. Recommended
torque is 7 in-lb.
The AC-VX is not compatible with Uninterruptible Power
Supplies (UPS) that generate a square wave.
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Fan Connections
Fan power connections are made through the FAN
terminals on terminal block TB1 marked FB (fan power,
black wire), FW (fan power, white wire), and G (fan
ground, green wire). Multiple fans can be connected in
parallel so long as the total current drawn by all fans
does not exceed 8.0 Amps. Some fan may draw more
current at reduced speed than at full speed. The 8.0
Amp current rating of the Ac-VX should not be exceeded
at any speed. An insulated wire size recommended by
the fan manufacturer to carry the full load amperage
should be used. Maximum wire size is number 14 AWG
insulted wire. Connect fan power wires to terminals FB
and FW and the fan ground wire to terminal G.
Connections are made by (1) stripping back ¼” (6 mm)
of wire insulation from the end of each fan wire and
ground, (2) inserting the exposed wire from each line
under the screw clamp plate at each connection, and (3)
securely tightening down each screw. Recommended
torque is 7 in-lb. Note that the fan ground (G) and earth
ground (G) terminals on TB1 are internally connected.
Control Signal/Thermistor Connections
The AC-VX is controlled by either an external
temperature sensor (CRI P/N P10-F) or voltage/current
signal. All control signals at terminal block TB2 are
isolated from line power.
Voltage/Current Signal Control: Connect one of three
possible control signal sources, as shown in Figure 3, to
its respective connection on terminal block TB2.
Number 14-24 AWG insulated wire should be used to
connect a voltage/current control source to TB2.
Connections are made by (1) stripping back ¼” (6 mm)
of wire insulation from the end of each control signal
wire, (2) inserting the exposed wire from each line into
the screw clamp at each connection, and (3) securely
tightening down each screw. Recommended torque is
4.4 in-lb.
Temperature Sensor Control: The temperature sensor
input is located at the two terminals on TB2 labeled
SENSE. There is no polarity consideration when
connecting the sensor. The input is compatible with CRI
sensor P/N P10-F. Connections are made by (1)
stripping back ¼” (6 mm) of wire insulation from the end
of each sensor lead, (2) inserting the exposed wire from
each lead into each SENSE screw clamp terminal, and
(3) securely tightening down each screw.
Recommended torque is 4.4 in-lb.
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