Grundfos DPC 1-3 - Pressure Boosting Application by Installing Pressure Switch; Start Condition; Stop Condition; Meaning of the Messages & Graphics Displayed on the LCD screen

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Wiring diagram
Pressure switch
#2
#1
Adjustable spring
+ +
+
+
O N
P
“liquid/pressure”
“store”button
1 2
L SWITCH
Short circuit
DRAINAGE APPLICATION BY INSTALING FLOAT SWITCH
(g) Application: Pressure boosting (using pressure switch)
Start condition: If the pressure in the pipeline is less than the set point of
pressure switch, relay contact of pressure switch is ON and liquid level in the
well/supply tank is above lower probe (float switch up position), the controller
will run the pump.
Stop condition: If the pressure has reached the set point of pressure switch,
relay contact of pressure switch is OFF, the controller will stop the pump.
Probe/sensor free application in case of submersible pumps: The unit has
reliable and automatic protection against dry running, if it is used for
submersible pump for deep well. Users can short the terminals 1, 2 & 3 to
achieve sensor free dry run protection.
(h) Application: Irrigation/sewage/drainage (using float switch)
Start condition:
When the “float switch A” reaches at up position,
the controller will run the pump.
Stop condition: When the “float switch A” reaches at down position, the
controller will stop the pump.
Overflow alarm: In case the level in the sump rises even if the pump is
draining water and the “float switch B” reaches at up position; the controller
will sound the overflow alarm to warn the pump operator.
Meaning of the messages & graphics displayed on the LCD screen
FULL
Pressure has reached set point and pump has
stopped.
DRY RUN
Liquid level in the borewell is below the pump
intake, pumps stop running.
NO WATER
Liquid level in the underground tank/water
well is below lower most probe (float switch:
down position), pump stops.
O
N
P
“liquid/pressure”
“store”button
1
2
L
SWITCH
Sewage tank
PRESSURE BOOSTING APPLICATION BY INSTALLING
PRESSURE SWITCH
Stop contact
Com contact
Meaning of the messages & graphics displayed on the LCD screen
FULL
“Float switch A” reaches up position, pump
starts running.
DRY RUN
Liquid level in the sump is below the pump
intake, pumps stop running.
NO WATER
“Float switch A” reaches down position, pump
stops.
OVERFLOW
“Float switch B” reaches up position, controller
will sound and alarm.