Grundfos DPC 1-3 - Water Supply;Transfer by Installing Probes or Float Switch; Meaning of the Messages & Graphics Displayed on the LCD Screen; Tank Full; Dry Run

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NOTE: In case of water transfer from underground tank to overhead
tank, 3 probes for underground tank need to be installed and same to
be connected at control terminals marked as 1, 2 & 3 after removing
the shorting link.
WORKING APPLICATIONS:
(e) Application: Clear water supply - liquid level control (using probes)
Start condition: When the liquid level in overhead tank is below lower probe
(in case of float switch, float is down) and liquid level in the underground tank is
above lower probe (in case of float switch, float is up), the controller will start
the pump.
Stop condition: When the liquid level in overhead tank reaches upper probe
(in case of float switch, float is up) or liquid level in underground tank is below
lower probe (in case of float switch, float is down); 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.
(f) Application: Water supply - liquid level control (using float switch)
O
N
P
“liquid/pressure”
“store”button
1
2
L
SWITCH
Short circuit
Water storage tank
O
N
P
“liquid/pressure”
“store”button
1
2
L
SWITCH
Short circuit
Water storage tank
WATER SUPPLY/TRANSFER BY INSTALLING PROBES
OR FLOAT SWITCH
Stop contact
Upper
probe
Lower probe
Comprobe
Com
contact
Meaning of the messages & graphics displayed on the LCD screen
TANK FULL
Liquid level in the overhead tank has reached
upper probe (float switch: up position), pump
stops.
DRY RUN
Liquid level in the bore well 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.