Electrical Installation; Startup; Alarms; Anti-Cycling - Grundfos CMB Booster PM2 Supplement To Quick Manual

4. Electrical installation

Warning
The electrical installation must be carried
out by an authorised person in accordance
with local regulations.
Check that the supply voltage and frequency
correspond to the values stated on the nameplate.
Warning
Before making any connections in the unit,
make sure that the power supply has been
switched off and that it cannot be
accidentally switched on.
The unit must be connected to an external
mains switch with a contact gap of at least
3 mm in all poles.
As a precaution, the unit must be
connected to a socket with earth
connection.
We recommend to fit the permanent
installation with an earth leakage circuit
breaker (ELCB) with a tripping current < 30
mA.
6

5. Startup

Do not start the pump until it has been

Caution

filled with liquid.

6. Alarms

If a dry-running alarm has been activated,
Caution
find the cause before the pump is restarted
in order to prevent damage to the pump.

6.1 Anti-cycling

In case of a very small consumption, the
anti-cycling function may detect this as
Note
cycling and stop the pump inadvertently. If
this occurs, the function can be disabled.
Disabling the function
To disable the function, set DIP switch 7 to "OFF".
See the quick guide.

6.2 Auto reset

Set auto reset to "on" only if there is
Caution
positive inlet pressure.