Calpeda M COMP 4-16 - Page 5

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
CMA
Stop
Minumum level
Start
4.70.1207.3
MAX MIN COM
CMA
Stop
Delay
Minumum level
Trimmer
(TIME)
(xx min)
4.70.1207.4
red led
green led
SENS
TIME