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Operational States (continued)
Operational State
Description
Idle Flush
An idle flush occurs once the system enters an idle state (no outlet flow) following 30 minutes of
cumulative operation since the last flush.
This is an automatic operation which does not require any additional action.
Low Inlet Pressure
Shutdown
A low inlet pressure shutdown occurs when the inlet pressure is below 8 PSI for more than 5
continuous seconds or below 1 PSI for 1 second.
This is an automatic operation which will remain in effect until the inlet pressure is above 30 PSI for 20
seconds continuously.
Low Pump-Inlet Pressure
Stage 1 - 4
The low pump inlet pressure states occur when the pump inlet pressure drops below the required level
for proper operation. There are four (4) stages which limit the pump motor speed to various levels
depending on the input pressure. These states allow the unit to continue operating at lower input
pressures.
This is an automatic operation which will remain in effect until the pump inlet pressure is above 30 PSI.
Maintaining 50
– 65 psi
Maintaining pressure is the default operating state for the system. In this state, the system is
maintaining a specific outlet pressure. This pressure is based on the outlet flow rate. For lower outlet
flow rates, the maintained pressure is higher.
This is an automatic operation and indicates the system is running normally.
Maintaining 8
– 16 gpm
Maintaining flow is an optional operational setting for the system. In this state, the system is
maintaining a specific output flow. This is typically used for systems feeding atmospheric tanks.
Once the setting is made, this is an automatic operation.
Maintaining (Hybrid)
Maintaining hybrid, or hybrid mode, is an optional operational setting for the system. In this state, the
system is maintaining pressure but is flow limited, based on the user selection, when the outlet
pressure drops below 35 psi. This is typically used for commercial applications.
Once the setting is made, this is an automatic operation.
