English (GB)
7
1.3 Safety instructions for the
operator/user
The safety instructions described in these
instructions, existing national regulations on health
protection, environmental protection and for accident
prevention and any internal working, operating and
safety regulations of the operator must be observed.
Information attached to the pump must be observed.
Leakages of dangerous substances must be
disposed of in a way that is not harmful to the
personnel or the environment.
Damage caused by electrical energy must be
prevented, see the regulations of the local electricity
supply company.
Only original accessories and original spare parts
should be used. Using other parts can result in
exemption from liability for any resulting
consequences.
1.4 Safety of the system in the event of a
failure in the dosing pump
The dosing pump was designed according to the
latest technologies and is carefully manufactured
and tested.
If it fails regardless of this, the safety of the overall
system must be ensured. Use the relevant
monitoring and control functions for this.
1.5 Dosing chemicals
2. General information
The DDE dosing pump is a self-priming
diaphragm pump. It consists of a housing
with stepper motor and electronics and a
dosing head with diaphragm and valves.
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.
Caution
Before starting work on the pump, the
pump must be disconnected from the
mains. The system must be
pressureless!
Note
The mains plug is the separator
separating the pump from the mains.
Caution
Make sure that any chemicals that are
released from the pump or any
damaged lines do not cause damage to
system parts and buildings.
The installation of leak monitoring
solutions and drip trays is
recommended.
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 drain
opening on the dosing head (see fig. 2).
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 medium 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.
