INSTRUCTIONS FOR USE
45
LM05EN002
L.2
PRESSURE SWITCH
Differential pressure switch for line pressure control.
L.2.1
Technical data
Adjustment range:
0,5 ÷ 8 bar (1)
Differential trip
:
0,3 ÷ 5 bar (2)
Sensitivity threshold:
0,2 bar (3)
Max permissible pressure:
30 bar
Contact ratings:
24 V; 6 A
Protection rating -EN 60 529
-:
IP 54
Ambient temperature:
- 20 + 70°C
Working fluid temperature:
+70 °C max.
L.2.2
Electrical connections
Differential pressure switch; it exchanges the contact at
maximum pressure and releases it at reset pressure.
The pressure switch can operate with the following operating
logic, depending on the pump model and the electrical panel
installed:
-
“Automatic”:
the pump stops when the upper pressure
limit is exceeded and restarts automatically when the
pressure falls below the reset value
-
“Safety”:
the pump stops when the upper pressure limit
is exceeded and restarts only and exclusively after the
consent of the operator and with pressure below the
reset value.
L.2.3
Calibration
With the calibration screw 2 the upper intervention point is
adjusted. Indication with index 3 (red arrow).
With the calibration screw 4 the lower intervention point is
adjusted; the upper point remains unchanged. Indication with
index 5 (green arrow).
The adjustment scale is not calibrated. For a more precise
calibration use a pressure gauge.
Note:
the green arrow 5 must never be below the minimum
value of the scale.
L.2.4
Overall dimensions
L.2.5
ATEX version
Refer to the documentation contained in the documents folder attached to the machine.
(1)
(2)
(3)
