Verderflex Dura 10, Operating Manual

Page: 16 / 28

Dura 5 - 35 4.0v-06.2013 16 | Page
6. Operation
6.1 Pre-commissioning the pump
6.1.1 Checking the direction of rotation with dry
pump
1. Ensure the pump has lubricant in it
2. Switch the motor on and check the direction of
rotation; switch immediately off again.
3. If the direction of rotation is different, check the
electrical connection (
*consult with electrician )
6.1.2 Starting the pump
DANGER
Risk of injury and poisoning due to pumped liquid
spraying out!

Use personal protective equipment when carrying out
any work on the pump.
WARNING
Risk of injury and poisoning due to hazardous pumped
liquids!

Safely collect any leaking pumped liquid and dispose
of it in accordance with environmental rules and
requirements.
DANGER
Equipment damage due to excess pressure!

Do not operate the pump with the discharge-side
fitting closed.

Operate the pump only inside the tolerances specified
by the manufacturer (→ 10.1 Technical specifications)

Pump set up and connected properly

Motor set up and connected properly

All connections stress-free and sealed

Pump housing lubricant level correct (→ 10.1.6
Lubricants).

All safety equipment installed and tested for
functionality
1.
Close all drainage taps.
2. Open the suction-side and the discharge-side fittings.
3. Switch on the motor and make sure it is running
smoothly.
4. Run the pump, flushing with water first ( cold
commissioning ) to check for leaks.
5. Verify that neither the pump unit nor the pipe
connections are leaking.
6. Perform a second flush by running the pump, 10–20
revolutions with pumped liquid, to remove residue and
water inside the pump.
6.1.3 Switching off
NOTE
Risk of dead heading and hose burst due to closed
suction or discharge!

Keep the suction and discharge side fittings opened till
the rotor has come to a complete stop.
WARNING
Risk of injury due to hot pump parts!

Use personal protective equipment when carrying out
any work on the pump.
NOTE
Equipment damage due to sediments!

If the pumped liquid crystallizes, polymerizes or solidifies:
– Flush pump
– Make sure that the flushing liquid is compatible with
the pumped liquid.
1. If necessary: Flush and empty the pump.
2. Switch off power to the motor.
3. Close the discharge side fitting.
4. Check all tie bolts and tighten them if necessary (only
after putting the pump into service for the first time).
6.2 Operation
6.2.1 Switching on
DANGER
Risk of injury due to running pump!

Do not touch the moving parts of a running pump.

Do not carry out any repair/ maintenance work on the
running pump.

Allow the pump to cool down completely before starting
any work on the unit.
DANGER
Risk of injury and poisoning due to pumped liquid
spraying out!

Use personal protective equipment when carrying out
any work on the pump.
NOTE
Risk of pulsation when throttling down the suction flow
rate!

Fully open the suction-side fitting and DO NOT use it to
adjust the flow as this could damage the hose.

Pump pre-
commissioned (→6.1)

Pump prepared and filled
1.
Open the suction-side and the discharge-side fittings.
2. Switch on the motor and make sure it is running
smoothly.