5
7.2.1. Operating with 2 level
probes
The pump stops when water no longer touches
the probe MIN and starts again when water
reaches the probe MAX.
- Insert the sensors in the well and connect them
to the appropriate terminals.
- Connect terminal COM to the pump earth lead.
- Turn, the timer (TIME) on the LVBT card;
completely in the counterclockwise direction
(timer at 0 minute).
• Green led “on”:
operation enabled.
• Red led “on”:
no water in well.
Connection diagram with 2 level probes
7.2.2. Operating with timed level
probe
The pumps stop when water no longer touches
the probe MAX. When water level reaches probe
MAX again, a timer (from 0 to 12 min) set on the
level control card SRL 3T starts to delay the
pumps starting (original set value about 3 min).
The delay time for starting of the pump must be
determined on the basis of the time required for
infiltration of the water into the well and re-
establishing of the dynamic level.
A delay time which is too short will result in an
excessive number of starts of the pump.
- Install the sensor in the well and connect it to
terminal MAX.
- Connect terminal COM to the pump earth lead.
- Select the pump-start delay time with the LVBT
card timer (TIME) (from 0 mins with the timer
turned fully in the counter-clockwise direction to
12 mins with the timer turned fully in the
clockwise direction).
•
Green led “on”:
operation enabled.
•
Red led “on”:
no water in well.
•
Red and green led indicators “off”:
timer has
been triggered
Connection diagram with timed level probe
8. Accessories
8.1. LVBT electronic card
(on request)
The
LVBT
electronic card for level control
includes:
- Terminals for connection 230 VAC main supply.
- Terminals for connection level probes (MAX,
MIN e COM). Voltage to sensors 8 VAC.
- Terminals for connection float switch (see note
1) or pressure switch.
- Power relay (30 A contact/240 VAC).
- Trimmer to adjust the water resistance to be set
from 2.5 to 50 kohm (original set value 10
kohm). To increase the sensitivity turn
clockwise.
- Trimmer to adjust the delay at restart to be set
from 0 to 12 mins.
- Green LED to indicate operation enabled.
- Red LED to indicate no water in well.
8.2. Level probes
Pair of min and max sensors with cables for
connection to the control box 2x0,75 mm
2
.
9. Disposal
Observe the local regulations and dispose of any
control gear accordingly. This product contains
electrical and electronic components and should be
disposed of accordingly.
MAX
MIN
COM
C
M
A
Stop
Minumum level
Start
4.70.1207.3
MAX
MIN
COM
C
M
A
Stop
Delay
Minumum level
Trimmer
(TIME)
(xx min)
4.70.1207.4
red led
green led
SENS
TIME
