10
GB
4. Operation
4.1 Operation with closed discharge
The pump HD-E is a positive displacement pump. The pump
must not be operated with closed shutoff elements, such as
nozzle, valves, etc. An excessive pressure build-up may result
in damage.
The use of a bypass valve with return line is strongly recom-
mended. The maximum pressure is then limited by the bypass
valve.
4.2 Complete drainage
In order to ensure that the container is emptied completely,
the pump must continue to run until the flow of liquid ceases
altogether. The container can be emptied most effectively by
tipping it up and guiding the intake opening to the tipping point.
4.3 Dry running
Dry running must be avoided. The pump is said to run dry if it
continues to operate without pumping any liquid whatsoever.
This can be ensured by remaining in attendance or with the aid
of such technical means as a flow monitor, etc.
4.4 Taking-out the pump tube
The pump tube must carefully be taken out of the container,
enabling the liquid, which is in the pump tube and piping,
flowing back into the container.
5. Storage
The pump should be stored in a sheltered, yet easily accessible
place. The pump tube should always be stored on the wall
bracket and never laid flat
(see Fig. 5)
. Flush the pump after
pumping hazardous liquids. Care must be taken to prevent
any remaining liquid from dripping onto the floor when storing
the pump.
6. Cleaning the pump tube
The pump must be flushed and cleaned after pumping aggres-
sive, tacky, crystallizing or contaminated liquids
(see Fig. 6)
.
The pump tube can be dismantled for cleaning. The wing nut
must be released
(see Fig. 7 – item 1)
. Now the pump tube
can be drawn off
(see Fig. 7 – item 2)
.
Before dismantling the pump tube it must be completey
emptied. Using a nozzle, residual liquid can remain in
the pump tube, after closing the nozzle and switching-
off the motor.
7. Repairs
Repairs should only be made by the manufacturer or authorized
Lutz-dealers. Only use genuine Lutz spare parts.
Before sending back the appliance, following must be observed:
• Residuals in the appliance can cause danger to the environ-
ment and human health. The appliance must be completely
emptied, rinsed and cleaned.
• Please advise which liquid has been pumped. A respective
safety data sheet must be attached to the return consign-
ment.