English (GB)
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2. General information
The DDA dosing pump is a self-priming
diaphragm pump. It consists of a housing
with stepper motor and electronics, a
dosing head with diaphragm and valves and the
control cube.
Excellent dosing features of the pump:
• Optimal intake even with degassing media, as
the pump always works at full suction stroke
volume.
• Continuous dosing, as the medium is sucked up
with a short suction stroke, regardless of the
current dosing flow, and dosed with the longest
possible dosing stroke.
2.1 Applications
The pump is suitable for liquid, non-abrasive,
non-flammable and non-combustible media strictly in
accordance with the instructions in these installation
and operating instructions.
Areas of application
• Drinking water treatment
• Wastewater treatment
• Swimming pool water treatment
• Boiler water treatment
• CIP (Clean-In-Place)
• Cooling water treatment
• Process water treatment
• Wash plants
• Chemical industry
• Ultrafiltration processes and reverse osmosis
• Irrigation
• Paper and pulp industry
• Food and beverage industries
2.2 Improper operating methods
The operational safety of the pump is only
guaranteed if it is used in accordance with section
2.1 Applications.
Warning
Other applications or the operation of
pumps in ambient and operating
conditions, which are not approved,
are considered improper and are not
permitted. Grundfos cannot be held
liable for any damage resulting from
incorrect use.
Warning
The pump is NOT approved for
operation in potentially explosive
areas!
Warning
A sunscreen is required for outdoor
installation!
Frequent disengagement from the
mains voltage, e.g. via a relay, can
result in damage to the pump
electronics and in the breakdown of the
pump. The dosing accuracy is also
reduced as a result of internal start
procedures.
Do not control the pump via the mains
voltage for dosing purposes!
Only use the "
External stop
" function to
start and stop the pump!
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