Safety Of The System In The Event Of A; Failure In The Dosing Pump; Dosing Chemicals; Diaphragm Leakage - Grundfos SMART Digital XL DDA 60-10 Installation And Operating Instructions Manual

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.
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.

1.5 Dosing chemicals

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.
When working with chemicals, the accident
prevention regulations applicable at the installation
site should be applied (e.g. wearing protective
clothing and safety goggles).
Observe the chemical manufacturer's safety data
sheets and safety instructions when handling
chemicals!
A deaeration hose, which is routed into a container,
e.g. a drip tray, must be connected to the deaeration
valve.
4

1.6 Diaphragm leakage

If the diaphragm leaks or is broken, dosing liquid
escapes from the drain opening on the dosing head.
See fig. 4, pos. 16. Observe section
leakage.
WARNING
Danger of explosion, if dosing liquid
has entered the pump housing!
Death or serious personal injury
Operation with damaged diaphragms can
lead to dosing liquid entering the pump
housing.
- In case of diaphragm leakage,
immediately separate the pump from
the power supply!
- Make sure the pump cannot be put back
into operation by accident!
- Dismantle the dosing head without
connecting the pump to the power
supply and make sure no dosing liquid
has entered the pump housing. Proceed
as described in section
8.6.1 Dismantling the dosing head,
diaphragm and valves in case of
diaphragm leakage.
To avoid any danger resulting from diaphragm
leakage, observe the following:
• Perform regular maintenance. See section
8.1 Regular maintenance.
• Never operate the pump with blocked or soiled
drain opening.
– If the drain opening is blocked or soiled,
proceed as described in section
8.6.1 Dismantling the dosing head, diaphragm
and valves in case of diaphragm
• Take suitable precautions to prevent harm to
health and damage to property from escaping
dosing liquid.
• Never operate the pump with damaged or loose
dosing head screws.
8.6 Diaphragm
leakage.