Wilo Control EC-L1 Series Installation And Operating Instructions Manual page 19

off on
1 2 1
+
Fig. 10: Connection overview symbol
4-20 mA
In
Fig. 11: Connection overview symbol
55 56 57 58 59 60
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36
37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54
10
Fig. 12: Discharge connection
6.5.7 Connection of the NW16 level
monitor
Installation and operating instructions • Wilo-Control EC-L • Ed.04/2022-09
• Dynamic pressure bell
Only "IPS" version!
• Float switch
• Electrode
–
Only Control EC-L1 ... and EC-L2 ...
–
Hardware version 2 or higher
–
Connection is protected against reverse polarity!
• Level monitor
Insert the connection cables laid by the customer through the threaded cable glands and
secure. Connect the wires to the terminal strip according to the connection diagram. Use
the terminal number shown in the connection overview on the cover.
Float switch or electrode
NOTICE! A max. of two pumps can be controlled if float switches or electrodes are used.
off
Level, "All pumps Off"
1 2
+
on
Level, "Pump 1 On"
1
on
Level, "Pump 2 On"
on
2
Level sensor
2
• Connection load: 4 ... 20 mA
• Do not connect active level sensors.
• NOTICE! Observe the correct polarity when connecting!
Dynamic pressure bell
10 Dynamic pressure bell, pressure connection
• Connection load: 0 ... 250 mbar
• Vent the dynamic pressure bell after each drainage process.
If the dynamic pressure bell cannot be readily ventilated, vent the dynamic pressure bell
with a compressor (bubbling-through system). Venting can take place continuously or
periodically.
1. Loosen and unscrew the union nut from the discharge connection.
2. Insert a union nut on the pressure hose of the dynamic pressure bell
3. Push the pressure hose onto the pressure connection as far as it will go.
4. Screw the union nut back onto the pressure connection and tighten it to fasten the
pressure hose.
DANGER
Risk of explosion if the level monitor is installed in potentially
explosive areas!
The NW16 level monitor does not have its own explosive protection
class.
• The NW16 level monitor may only be installed outside potentially ex-
plosive atmospheres!
en
19