ZUWA Impeller Pumps
23
reset button
10. Accessories
10.1 Dry run protection
Dry run protection prevents overheating of the impeller.
When the pump is running dry and heats up the thermo
sensitive switch turns off the motor. After cooling off the
pump is ready to use again.
>
To restart the cooled pump press the red reset
button.
Observe the maximum temperature of the fluid when a
dry run protection is used
-
60°C ±3K for UNISTAR and COMBISTAR
-
45°C ±3K for NIROSTAR A and B
10.2 Flow control
With the flow control the flow rate of the pump
can be controlled and adjusted to a specific
quantity.
Flow rate measurement is based on the
principle of a floater connected to a spring.
The flow meter is integrated in the housing.
The flow rate can be adjusted with an
adjusting screw:
>
Turn the adjusting screw using the scale
from 1 - 6
>
Fine adjustment: turn the setting screw
when pump is operating until the required
flow rate is shown in the vision panel.
Technical data
flow rate:
2
–
8 L/min
(for A-types)
8 -30 L/min
(for A-types)
10
–
40 L/min
(for B-types)
connecting thread:
2 x ¾“ a
2 x 1" a
2 x 1" a
max. fluid
temperature:
100°C
max. working
pressure:
10 bar
material:
brass (approved for drinking water)
adjusting
screw
