14
15
DRAINAGE APPLICATION BY INSTALLING FLOAT SWITCH
(g)
Application: Pressure boosting (using pressure switch)
Start condition:
Pressure in the pipe line 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:
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.
Over f l ow 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 over f l ow 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.
Wiring diagram
Pressure switch
#2
#1
Adjustable spring
+ +
+ +
Internal capacitance
“store”button
O N
P
“liquid/pressure”
1 2
L
SWITCH
N1 L1 C
M
Pump
Short circuit
N
L PE
AC200V
Wiring diagram
Internal capacitance
O N
P
“liquid/pressure”
“store”button
1 2
L
SWITCH
N1 L1 C
N L PE
AC200V
M
Pump
Sewage tank
PRESSURE BOOSTING APPLICATION BY INSTALLING
PRESSURE SWITCH
St
op
co
nt
ac
t
Com
co
nt
ac
t
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.
OVER FLOW
“Float switch B”
reaches up position, controller
will sound and alarm.
