Receiving The Product; Installing The Product; Mechanical Installation - Grundfos ALR 20/A Ex Montage- Und Betriebsanleitung

2. Receiving the product

When receiving the product, check the following
points:
• the product is as ordered.
• the product is suitable for the actual supply
voltage.
• the product has not been damaged during
transportation.

3. Installing the product

The ALR 20/A Ex must only be used
together with leakage sensor type
AL05 Ex.
Installation must be carried out by qualified
persons only.
CAUTION
Electric shock
Minor or moderate personal injury
- Switch off the power supply before you
start any work on the product.
- Make sure that the power supply cannot
be accidentally switched on.
6

3.1 Mechanical installation

The ALR20/A Ex relay itself is not
explosion protected and it is forbidden to
install it in a potentially explosive
environment.
The ALR20/A Ex must be connected to the
explosion-proof leakage sensor type
AL05 Ex so that they form a function unit
where the ALR 20/A Ex is part of the
explosion protection of the sensor.
The AR 20/A Ex must be installed in a way
that the minimum protection class of IP54
is fulfilled according to EN 60529.
The ambient temperature of the installation
site must not exceed 40 °C.
During installation the sensitivity of the seal
monitoring is defined by the setting of the switch
point. In addition, this setting eliminates disturbing
effects such as cable length to the sensor, type of
gear oil, ambient temperature, etc.
The ALR 20/A Ex can be fitted on DIN EN-mounting
rail TS 35 on side-by-side with 10 mm clearance.
The ALR 20/A Ex must be installed in the control
cabinet:
1. Slide the ALR 20/A Ex onto a rail to the correct
position.
ALR 20/A Ex is equipped with a mounting
bracket that fits only to 35 mm width
mounting rail.
2. Connect the wires according to the instructions in
section 3.2 Electrical
3. Carry out the electrical connection. See also
section 9. Technical data.
connection.