Grundfos DME 60 Montage- Und Betriebsanleitung Seite 17

5.2 Start/stop of pump
The pump can be started/stopped in two different
ways:
• Locally on the pump control panel.
• By means of an external on/off switch.
See connection overview in section
4.6 Connection overview.
5.3 Priming/venting of pump
The pump control panel incorporates a
Press this button if the maximum pump capacity is
required over a short period, e.g. during start-up.
When the button is released, the pump automatically
returns to the previous operating mode.
During priming/venting, it is recommended to let the
pump run without a counter pressure or to open the
vent valve.
Note: When the buttons
simultaneously, the pump can be set to run for a
specific number of seconds at maximum capacity.
The remaining number of seconds will appear in the
display. The maximum value is 300 seconds.
5.4 Level control
The pump can be fitted with a level control unit for
monitoring of the chemical level in the tank.
The pump can react to two level signals. The pump
will react differently, depending on the influence on
the individual level sensors.
Level sensors Pump reaction
•
Upper sensor
activated (closed •
contact)
•
•
Lower sensor
activated (closed •
contact)
•
For connection of the level control unit and alarm
output, see section 4.6 Connection
5.5 Diaphragm leakage sensor
The pump can be fitted with a diaphragm leakage
sensor, which detects diaphragm leakage.
The sensor should be connected to the drain hole in
the dosing head.
In case of diaphragm leakage, the signal from the
sensor generates an alarm and the alarm relay will
be activated. See also section
indicator lights.
For connection of the diaphragm leakage sensor,
see section 4.6 Connection
button.
100%
and are pressed
100%
Red indicator light is on.
Pump running.
Alarm relay activated.
Red indicator light is on.
Pump stopped.
Alarm relay activated.
overview.
5.6 Alarm output and
overview.
17