INSTALLATION PLANNING
Typical Surface Pressure Boosting Application
13
Typical Surface Pressure Boosting Application
The above drawing illustrates how a typical surface mounted pump system should be arranged for a pres
-
sure boosting application.
1.
Water Supply
2.
Check Valve
3.
Ball Valve
4.
Pressure Relief Valve:
Pressure relief valve must be able to pass full pump flow up to 100 PSI.
5.
Pressure Tank:
Refer to
“Minimum Pressure Tank and Supply Pipe Sizing” on page 15
.
6.
Pressure Gauge
7.
Pressure Sensor or Transducer:
Install in a vertical position after the pressure tank, and within 6 feet
(1.8 meters) of the tank to minimize pressure fluctuations. There should be no elbows between the tank
and sensor.
8.
SubDrive Utility VFD
9.
Power Supply from Circuit Breaker:
Single phase, 115/230 VAC +/- 10%.
10.
Power to Motor:
Single-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.
Risk of bodily injury or property damage.
•
Pumps can develop very high pressure in some situations. Always install a pressure relief valve able
to pass full pump flow up to 100 psi.
•
Install the pressure relief valve near the pressure tank and route to a drain capable of full system flow.
