Phason FC Series User manual

FC-1T-1VAC 1 / 4 14741000
FC-1T-1VAC user manual
The FC-1T-1VAC automatically controls ventilation fans according to temperature. When the temperature is at the
set point, the control operates the fans at the idle speed setting. When the temperature exceeds the set point, it
increases the speed of the fans. The FC-1T-1VAC has two modes of operation:
Automatic shut-off mode: When the temperature drops below the set point, the control shuts off the fans
Idle mode: When the temperature drops below the set point, the control operates the fans at idle speed.
Features
One variable speed output
Automatic shut-off and idle modes
Fixed 2°F off setback for shut-off mode
Adjustable idle speed for idle mode
Adjustable temperature set point
Fixed 6°F temperature differential
Overload protection fuse
One-foot temperature sensor (extendable)
Rugged, NEMA 4X enclosure (corrosion
resistant, water resistant, and fire retardant)
CSA approval
Two-year limited warranty
Installation
Switch OFF the power at the source before connecting the incoming power wires.
DO NOT switch on the power until you have finished all wiring and verified all equipment is
properly connected and free of obstructions.
Electrical ratings
Input
120/230 VAC, 50/60 Hz
Variable stage
10 A at 120/230 VAC, general-purpose (resistive)
7 FLA at 120/230 VAC, PSC motor
1/2 HP at 120 VAC, 1 HP at 230 VAC, PSC motor
Variable stage fuse
15 A, 250 VAC ABC-type ceramic
Fill in the table below to help configure your control and verify that you do not exceed the electrical ratings.
Fans
A) Maximum current draw per fan
B) Number of fans
Total current draw = A × B
Make
Model
Voltage rating
Power factor

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1. Set the voltage switch to the correct position for the line voltage used, 120 or 230 VAC.
2. Position the jumper for the mode you want to use, automatic shut-off or idle mode.
3. Connect the wires as shown in the diagram.
Automatic shut-off mode
1. Turn the Temperature knob to the point where the fan turns on.
2. Turn the Idle Speed knob to the minimum idle speed desired.
3. Turn the Temperature knob to the desired temperature.
Idle mode
1. Turn the Temperature knob fully clockwise.
2. Turn the Idle Speed knob to the minimum fan speed desired.
3. Turn the Temperature knob to the desired temperature.

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Troubleshooting
The fan motor will not run
Reset the thermal cutout on the fan motor. Allow the motor to cool.
Check the wiring.
Test the power at the control using a voltmeter.
Replace the fuse. If the fuse blows immediately then there is a problem with the wiring or the fan motor. If the
fuse blows after a delay (minutes, hours, for example), the load exceeds the current rating of the control.
The fan motor growls
Make sure the motor is working by disconnecting the wire at terminal 1 and terminal 4 and then connect these
lines together. The fan should run at full speed.
Make sure excessive electrical noise is not being induced onto the temperature sensor by using a short sensor,
the standard one-foot one included with the control will work.
The Temperature knob will not control the fan speed
Check the sensor wiring.
Replace the temperature sensor (part number MT-P3) if the motor runs at idle or full speed regardless of the
temperature setting.
Contact your dealer if this guide fails to resolve your problem.

FC-1T-1VAC 4 / 4 14741000
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