OPERATION
Priming the System
OPERATION
Risk of bodily injury or damage to pump or other equipment.
•
Maximum operating pressure should be limited to whatever level is needed to protect the rest of
the existing system plumbing. When required, a pressure relief valve should be installed, and/or the
optional over pressure switch can be used.
•
Do not run pumps against a closed discharge, or at a system operating pressure above 145 psi (10
bar).
Risk of damage to pump or other equipment.
•
The pump has been evaluated for use with water only.
•
Do not run the pump dry, which can cause overheating and damage to the unit. This will void the
warranty.
By adjusting the pump/motor speed, the system automatically reacts to any change in system demand
while maintaining a constant output pressure. The system's constant output pressure should not fluctuate
more than a psi or two, even though the overall system's water flow requirement may change dramatically.
Maximum suction pressure is 70 psi (4.8 bar).
NOTE: The drive electronics provide motor overload protection by preventing motor current from exceeding
the maximum Service Factor Amps (SFA). Motor over-temperature sensing is not provided by the drive.
Priming the System
1.
Fill the suction pipe, pump, and discharge piping completely with water.
NOTE: If the system contains a tank or pressurized water source (creating a flooded suction condition),
this step may be unnecessary.
2. Close all system water outlets.
3. Slightly crack one system outlet to allow excess air to bleed out of the system.
4. Start the pump.
5. Slowly open the discharge valve to halfway.
6. If after a few minutes of running water does not appear, repeat priming process.
NOTE: The pump may be locked by excess air that is trapped in the unit.
7.
Once the pump is operating, open the discharge valve and a system outlet fully, letting the pump oper-
ate until the water is running without any air sputtering.
NOTE: No further priming is necessary unless the pump is drained or a leak develops in the suction plumb-
ing.
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