Connecting The Level Sensor - Grundfos LC 220 Montage- Und Betriebsanleitung

Pos. Description
1 Terminals for power supply
2 Terminals for connecting the pump
Terminals for connecting an external level
3
switch to start the pump.
4 Terminals for "common alarm" output signal
5 PCB with piezoresistive pressure sensor
6 DIP switch
7 Service connector (PC Tool)
8 Control circuit fuse, fine-wire fuse
9 Battery (non-rechargeable)
10 Terminals for internal float switch
NO = Normally Open
NC = Normally Closed

5.4 Connecting the level sensor

The level measurement is done by a pressure sensor located in
the controller. The pressure is transmitted to the sensor by means
of a transparent pressure hose connected to the pressure tube in
the tank.
The pressure hose must be routed rising towards the controller to
avoid condensation in the hose.
Connect the pressure hose between the pressure tube in the tank
and the bulk head fitting in the controller cabinet. The pressure
hose must be inserted into the cabinet up to the stop.
Insert approximately 15 mm. Otherwise there is a risk of leakage
resulting in pressure loss, inaccurate level detection and
malfunction of the system.
Excessive lengths of pressure hose should be cut away.
The pressure hose must not be kinked.
The connection must be air tight to ensure reliable operation.
10
230 V, NO
Potential-free changeover contacts NO/NC with
max. 250 V / 2 A
0-5 V
1. Inlet height:
ON = 250/520 mm
(Multilift MSS/Unolift)
OFF = 180 mm
2. Reset setting:
ON = Automatic
OFF = Manual
3. Service interval:
ON = 1 year
OFF = None
4. Calibrate level sensor (Do not touch if you do not
know how to calibrate)
ON = Safe (normal position)
OFF = Switch briefly to OFF for sensor to adjust
to ambient pressure.
(See service instructions)
6-pole connector
100 mA / 20 mm x ∅5
9 V
NO
Terminal numbers
PE, N, L3, L2, L1
W1, V1, U1, N, PE
13, 14
31, 32, 33
81, 82