Operation
Ensure proper power is connected to the disconnect from the building breaker panel. The blue “Power” indicator should be illuminated. Turn the red disconnect handle to the “On” position. Push the “Fan On” button to start the fan. To shut the fan down, push the “Fan Off” button. If the control panel detects a fault, it will automatically shut the fan motor off. See the troubleshooting section of this manual to determine common causes of motor faults. To adjust the speed of the fan, turn the “Fan Speed” potentiometer up or down. Higher numbers on the dial represent faster fan speed. Lower numbers on the dial represent slower fan speed. Push the “Lights On” button to turn on the lights. To shut the lights off, push the “Lights Off” button. Sequence of Operation 120vac control power is sent to fire suppression control panel (by others). The fire suppression control panel contains a normally closed contact that allows power to return to VFD control panel so long as the suppression system is not faulted. Operator pushes fan on button, power is sent to the coil of CR1 relay. Power energizes the coil of CR1 relay. CR1 relay pulls in and sends fan run command to VFD. VFD sends power out to motor. Motor runs at speed set point on display. VFD detects voltage output and closes MA & MC contact which allows control power to flow to coil of CR2 relay. CR2 relay pulls in and sends power to Fan On indicator light, and to the terminal block 4. Optional Features (when field connected) After power reaches terminal block 4, it feeds to optional door limit switches. If all doors are proven closed, power returns to terminal 40. After power reaches terminal 40, a factory jumper allows power to continue to terminal 42. Remove this factory jumper if other optional interlock equipment is required to shut off the compressed air solenoid for the spray equipment. After power reaches terminal block 42, it feeds out to the hot side of the compressed air solenoid. The solenoid energizes and allows compressed air to feed to the spray equipment.
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