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INSTALLATION AND SETUP
Typical Surface Pressure Boosting Application
Typical Surface Pressure Boosting Application
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The above drawing illustrates how a typical surface mounted pump system should be arranged for a pres-
sure boosting application.
Water Supply
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2. Check Valve
3. Ball Valve
4. Pressure Relief Valve: Pressure relief valve must be able to pass full pump flow at 300 PSI.
Risk of bodily injury or property damage.
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Pumps can develop very high pressure in some situations. Always install a pressure relief valve able
to pass full pump flow up to 300 psi.
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Install the pressure relief valve near the pressure tank and route to a drain capable of full system flow.
5. Pressure Tank. Refer to
6. Pressure Gauge
Pressure Transducer or Sensor: Install in a vertical position after the pressure tank, and within 6 feet
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(1.8 meters) of the tank to minimize pressure fluctuations. There should be no elbows between the tank
and sensor.
8. SubDrive Connect Plus VFD
9. Power Supply from Electrical Panel. Single phase (shown) 208/230 VAC ± 10%, three phase 230 VAC
±10%, or three phase 460 VAC ±10% (depending on drive model rating).
10. Power to Motor: Three-Phase.
11. Optional Bypass: For system maintenance.
IMPORTANT: If the pump is equipped with a built-in pressure switch, the power wires from the VFD must
bypass the pressure switch and connect directly to the motor.
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"Minimum Pressure Tank and Supply Pipe Sizing" on page
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