Grundfos SMART Digital DDA, Инструкция по установке и эксплуатации

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1.5 Dosing chemicals
2. General
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
Before switching the supply voltage
back on, the dosing lines must be
connected in such a way that any
chemicals in the dosing head cannot
spray out and put people at risk.
The dosing medium is pressurised and
can be harmful to health and the
environment.
Warning
When working with chemicals, the
accident prevention regulations
applicable at the installation site
should be applied (e. g. wearing
protective clothing).
Observe the chemical manufacturer's
safety data sheets and safety
instructions when handling chemicals!
Warning
If the diaphragm leaks or is broken,
dosing liquid will escape from the
discharge opening on the dosing head
(see fig. 3).
Take suitable precautions to prevent
harm to health and damage to property
from escaping dosing liquid!
Check daily whether liquid is escaping
from the discharge opening!
Changing the diaphragm, see section
7. Service.
Caution
A deaeration hose, which is routed into
a container, e. g. a drip tray, must be
connected to the deaeration valve.
Caution
The dosing medium must be in liquid
aggregate state!
Observe the freezing and boiling points
of the dosing medium!
Caution
The resistance of the parts that come
into contact with the dosing medium,
such as the dosing head, valve ball,
gaskets and lines, depends on the
medium, media temperature and
operating pressure.
Ensure that parts in contact with the
dosing media are resistant to the
dosing medium under operating
conditions, see data booklet!
Should you have any questions
regarding the material resistance and
suitability of the pump for specific
dosing media, please contact
Grundfos.
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!