Pressure feedback
Tell us the working pressure and sensor signal used by the system. The drive can then be selected around the motor and feedback arrangement.
Pump, Fan & HVAC Drive
FU9000B Variable Frequency Drive for Pumps, Fans and HVAC Systems
FU9000B is built for systems where demand changes during the day. Instead of running a pump or fan at one fixed speed, the drive can adjust motor speed around pressure, flow or other process feedback.
Power1.5–500 kW
Voltage classes220 / 380 / 480 V
FocusProcess feedback control
Changing Demand
The Motor Does Not Need to Run the Same Way All Day
Water demand changes. Airflow demand changes. A process setpoint can also move. FU9000B is intended for those jobs, using feedback to adjust motor speed around the condition the system is trying to maintain.
That is a different selection problem from a conveyor or hoist. The motor plate still matters, but pressure, flow and the feedback device become part of the quotation data too.
Process Feedback
Start with the Variable You Actually Need to Hold
For many water systems it is pressure. For a ventilation system it may be airflow or another process condition. FU9000B is selected and set up around that feedback loop, not around motor speed by itself.
Flow-related control
Where flow changes with demand, motor speed can be adjusted instead of treating the system as a simple full-speed on/off load.
HVAC operation
FU9000B includes HVAC-specific functions for fan and building-service applications. The exact control logic depends on the system design.
Pump Protection
Pipe Rupture Monitoring Is Part of the Series Positioning
FU9000B includes pipe rupture monitoring for pump applications. It gives the control system another way to watch for an abnormal operating condition instead of treating every pressure change as a normal demand change.
The threshold and response need to fit the actual hydraulic system. The pipe layout, sensor position and normal pressure range should be clear before the function is commissioned.
A VFD cannot replace good hydraulic design. Check valves, sensors, pipework, pump sizing and system protection still need to be selected for the installation.
Applications
One Series, Three Different Types of Demand
Water pump
Pressure and flow demand are usually more useful than a generic ‘pump VFD’ description when choosing the drive.
HVAC fan
Air systems often run under changing demand. The fan motor, control signal and airflow requirement should be reviewed together.
Pump and fan stock orders
For distributor stock, separate the range by motor power and voltage class so common project sizes are easier to quote and replenish.
System View
Sensor → FU9000B → Motor → Pump or Fan
The drive sits between the electrical supply and the motor, while the process feedback tells the control loop what the system is doing. This simple view helps separate three different questions: is the motor sized correctly, is the feedback signal usable, and is the process setpoint realistic?
Sensor
Pressure, flow or another process signal needs to reflect the condition the system is trying to control.
Drive
FU9000B adjusts motor operation according to the selected control strategy and feedback.
Motor & load
The pump or fan still has to be mechanically suitable for the required operating range.
Selection Data
What We Ask for Before Quoting FU9000B
| Project data | What it tells us |
|---|---|
| Motor nameplate | Power, current, voltage, frequency and motor speed. |
| Pump or fan type | Separates the electrical load from the process application. |
| Site voltage | Used to choose the correct 220, 380 or 480 V class. |
| Required pressure / flow | Defines the process target instead of choosing by motor size alone. |
| Feedback sensor | Shows how the actual process condition is sent back to the control system. |
| Normal operating pattern | Helps us understand whether demand is stable, intermittent or changing throughout the day. |
Pump vs Fan
The Same VFD Series Can Serve Two Very Different Systems
Pumps and fans are grouped together because both often run under variable demand, but the process data are not the same. A water system may be described by pressure and flow. An HVAC fan may be described by airflow, duct condition or a building-control signal. We keep the motor selection and the process selection separate until both are clear.
For a pump project
Send the pump motor plate, normal pressure, required pressure or flow, feedback sensor information and a short description of how demand changes. If pipe rupture monitoring is required, mention it at the quotation stage.
For a fan or HVAC project
Send the fan motor plate, voltage, control signal and the operating condition the system is trying to maintain. If the drive will receive a command from a building or process controller, include that interface information too.
Feedback Planning
A Good Feedback Signal Is More Important Than a Complicated Parameter List
Process feedback only works when the sensor represents the condition the system actually needs to control. Sensor location, signal type and normal operating range should therefore be settled early. The drive can then be configured around a real process target instead of a guessed speed percentage.
For retrofit work, a photo of the existing sensor label and controller terminals can save time. It helps us see whether the new drive is expected to work directly with the sensor or receive a reference from another controller.
Series Choice
FU9000B or a General-Purpose VFD?
For a simple motor that only needs adjustable speed, a general-purpose VFD may be enough. FU9000B becomes more relevant when the project is built around a pump, fan or HVAC process and the motor speed needs to follow pressure, flow or another feedback signal.
This is why we ask about the process before choosing the series. The motor can be identical while the control requirement is completely different.
Factory Check
Testing and Project Documentation
FU9000B orders are checked against the approved model and order file before shipment. Electrical and functional verification is part of the quality-control workflow. When a project depends on a specific feedback or protection function, that requirement should be clear in the order file.
Technical files:
Use the current FU9000B datasheet and manual for the exact current, terminals, feedback setup and model-specific functions.
Use the current FU9000B datasheet and manual for the exact current, terminals, feedback setup and model-specific functions.
FAQ
FU9000B Questions
What is FU9000B designed for?
FU9000B is UFELE’s pump and fan / HVAC VFD series. It is used where motor speed needs to follow changing system demand.
What is the FU9000B power range?
The series covers 1.5 to 500 kW (2–670 HP) with 220 V, 380 V and 480 V classes.
Can FU9000B work with pressure or flow feedback?
Yes. The series is intended for process-feedback control in pump and fan systems. The actual sensor signal and control arrangement should be specified during selection.
What is pipe rupture monitoring used for?
It is a pump-system function used to monitor abnormal operating conditions associated with a pipe problem. The exact setup should follow the FU9000B manual and the system design.
What information is needed for a pump or fan quotation?
Send the motor nameplate, site voltage, pump or fan type, required pressure or flow condition, feedback sensor information and operating pattern.
FU9000B Selection
Send the Motor Plate, Pressure / Flow Data and Sensor Type
That gives us both sides of the application: the motor and the process.