Installation; Location; Mounting The Cabinet; Connecting The Cabinet - Grundfos LC 115 Serie Manual Del Usaurio

4. Installation

Warning
Before starting any work on pumps used to pump
liquids which could be constituted as being
hazardous to health, thorough cleaning/venting
of pumps, pits, etc. must be carried out
according to local regulations.
Warning
Before making any connections in the controller
or work on pumps, pits, etc., switch off the power
supply. Make sure that it cannot be accidentally
switched on.
The installation must be carried out by authorised staff in
accordance with local regulations.

4.1 Location

Warning
In potentially explosive areas, the float switch, if
any, must be connected via an Ex-barrier, e.g.
Grundfos LC-Ex4 Zener barrier (No. 96440300).
Use only float switches approved for use in
potentially explosive areas.
Install the controller and the Ex-barrier outside
the potentially explosive area.
The controller can be installed at ambient temperatures from
-20 to 50 °C.
When installed outdoors, the controller must be placed in a
protective shed or cupboard. It must not be exposed to direct
sunlight.
The maximum length of the sensor cable is 30 m.
N L
Fig. 3 Connecting sensor and alarm devices
6
3 - NC T21
2 - NO T11
1 - COM
M1 M2

4.2 Mounting the cabinet

1. Remove the transport protectors, if any, from inside the
cabinet.
2. Mount the cabinet on a plane wall with screws through the
mounting holes. See fig. 1.
The cable glands must point downwards.
Note Fit additional cable glands to the base of the
cabinet, if necessary.

4.3 Connecting the cabinet

Make sure that a 250 mA backup fuse is installed
Caution
in the fuse holder. See pos. 6 in fig. 1.
Connect the following devices to the controller:
• Level sensor. See fig. 3.
• Power supply. See fig. 4.
• Pump(s). See fig. 4.
Optional:
• Overtemperature protection. See fig. 3.
• High-level float switch. See fig. 3.
• External high-level alarm device. See fig. 3.
• External overtemperature alarm device. See fig. 3.
See also the wiring diagram delivered with the product.
Connect the screen of the conductor from the
level sensor via a metal bracket to the earthed
Note
metal backplate of the cabinet.
T22 5 Ub
T12 4 Io
PE
4-20
N L
mA
42
41