7
3. Installation
3.1 Safety instructions
• When working with chemicals, local safety rules
and regulations must be observed (e.g. wear pro-
tective clothes).
• Before starting work on the dosing pump and sys-
tem, disconnect the electricity supply to the pump,
ensuring that it cannot be accidentally switched
on. Before reconnecting the electricity supply,
make sure that the dosing hose is positioned in
such a way that any chemical left in the dosing
head is not ejected, thereby exposing persons to
danger.
• If the vent valve in the dosing head is used, it
must be connected to a hose which is led back to
the tank.
• When changing a chemical, make sure that the
materials of the dosing pump and system are
resistant to the new chemical. If there is any risk
of chemical reaction between the two types of
chemicals, clean the pump and system thoroughly
before adding the new chemical.
• The liquid is under pressure and may be hazard-
ous.
3.2 Installation environment
• Exposure to direct sunlight should be avoided.
This applies especially to pumps with plastic dos-
ing heads, as this material can be damaged by
sunlight.
• If the pump is installed outside, an enclosure or
similar protection is required to protect the pump
against rain and similar weathers.
3.3 Installation of pump
•
Note:
The dosing head may contain water from
the factory test. If a liquid which must not come
into contact with water is to be dosed, it is recom-
mended to let the pump run with another liquid to
remove the water from the dosing head before
installation.
• Always install the pump on the supporting foot
with vertical suction and discharge ports.
• Always use suitable tools for the mounting of plas-
tic parts. Never apply unnecessary force.
• Make sure that the dosing pump and system are
designed in such a way that neither system equip-
ment nor buildings are damaged in case of leak-
age from the pump or rupture of hoses/pipes. The
installation of leakage hoses and collecting tanks
is recommended.
• Make sure that the drain hole in the dosing head
points downwards, see fig.1.
Note:
It is important that the drain pipe/hole is not
inserted direct into the tank contents, as gasses
may penetrate into the pump.
Fig. 1
3.4 Electrical connection
• The electrical connection of the pump should be
carried out by qualified persons in accordance
with local regulations.
• For electrical data of the pump, see section
.
3.5 Start/stop of pump
The pump can be started/stopped by switching on/off
the electricity supply.
3.6 Priming/venting of pump
During priming/venting, it is recommended to let the
pump run without a counter pressure or to loosen the
vent valve by giving it a 1/8 to 1/4 turn.
4. Maintenance
The pump is maintenance-free. However, it is recom-
mended to keep the pump clean.
The dosing pump is produced according to the high-
est quality standards and has long life. The pump
incorporates wear parts such as diaphragm, valve
seat and valve balls.
To ensure long life and to reduce the risk of distur-
bance of operation, visual checks should be carried
out regularly.
It is possible to order dosing heads, valves and dia-
phragms in materials which are suitable for the spe-
cific liquid to be pumped. See the product numbers
at the end of these instructions.
5. Service
Before returning the pump to GRUNDFOS for serv-
ice, the safety declaration at the end of these instruc-
tions must be filled in by authorized personnel and
attached to the pump in a visible position.
Note:
If a pump has been used for a liquid which is
injurious to health or toxic, the pump will be classi-
fied as contaminated.
If GRUNDFOS is requested to service the pump, it
must be ensured that the pump is free from sub-
stances that can be injurious to health or toxic. If the
pump has been used for such substances, the pump
must be cleaned before it is returned.
If proper cleaning is not possible, all relevant infor-
mation about the chemical must be provided.
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Drain hole
