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4.7 Sensor connections for different function switch settings
4.7.1 Pressure Booster Mode
Function Switch Setting
Fig 13: Pressure Booster Mode Setting and Display
Operation
Ÿ Suppose the pressure setting of Pressure Switch B is higher than Pressure A.
Ÿ Pressure switch with N/C (normal close) contact, no pressure, contact is ON; meet
the pressure setting, contact point is OFF.
Ÿ User can set the pressure value of the two pressure switches by themselves, but there
must be pressure difference between pressure switch A&B.
Normal Pressure Demanding
When the Pressure in the pipeline is lower than the setting of pressure switch B, the
controller will run a single pump, until the pressure reaches the setpoint of pressure
switch B, then the single pump stops running.
When the pressure in the pipeline varies in the range of pressure switch B, the controller
will alternate both pumps.
Extra Pressure Demanding
When the pressure in the pipeline is decreasing from the set point of pressure switch A
and a single pump is running, the controller will run the second pump, till pressure in the
pipeline reaches the setting of pressure switch B, both pumps will not stop running.
Fig 14: Pressure Booster Mode with Pressure Switches on Delivery Pipeline
LCD Display
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