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SELECTING A SUITABLE OPERATING MODE

Selecting a suitable operating mode is critical to the use of the E30. The

mode you choose will depend on exactly what the pump system is required

to do and how you want it controlled. Step through the modes by pressing

the (˅) (˄) buttons. Highlight the mode you want to use and press and

release (P) to lock it into the E30’s memory and to advance to the next

screen.

Mode 1 Pressure Switch

In mode 1 the E30 operates as a loss of prime pressure switch. Mode

1 provides you with a start-up timer to allow time for the pump to start and

for the system pressure to climb above whatever trip pressure you may

enter. A run-on timer is also available so the E30 can ignore short term

dips in pressure without tripping out on low pressure.

Mode 1 is commonly

used to control pressure systems and provide loss of pressure

protection to pumps.

Mode 2 Pressure Guard

Mode 2 is used to protect systems against over and under pressure

conditions.

Mode 2 allows you to set a high and low-pressure limit and a

trip pressure. The pressure guard functions as a protection device for

systems that are normally controlled by other means. In the event of a

problem developing, mode 2 can override the systems normal control and

shut the system down.

Mode 2 is commonly used to protect pumps

and pipe systems against high and low-pressure extremes.

Mode 3 Snap Action Pressure Switch

In mode 3 the E30 acts as a single point snap action pressure switch.

Mode 3 causes the E30’s output relay to switch on and off on a very ﬁ ne

pressure differential. The set point is fully adjustable as is the precise

difference between the on and off pressure points.

Mode 3 is suitable for

general process control applications.

Mode 4 Dual Pump Control

The E30 can control 2 pumps simultaneously using its 2 output relays.

The pumps operate independently in terms of their starting and stopping

pressures.

Applications for mode 3 include duty and standby pump

sets, dual alternating pump sets and line pressurising systems.

KELCO E30 User Manual

Other manuals for KELCO E30