VERDER VERDERAIR VA-E50, Operation

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Operation
Operation
Tighten Fasteners
Before mounting and using the pump for the first time,
check and retorque all external fasteners. Follow
Torque Instructions, page 22 , or see the torque
tag on your pump. After the first day of operation,
retorque the fasteners.
Flush the Pump Before First Use
The pump was tested in water. Ifwater could
contaminate the fluid you are pumping, flush the
pump thoroughly with a compatible solvent. See
Flushing and Storage, page 21 .
Transfer Mode Vs. Low Pulsation
Mode
When the air pressure is at least 0.7 bar (10 psi)
higher than the desired outlet pressure, the pump
is in Transfer Mode and no pulsation damping
is occurring. To reduce outlet pulsation, start by
setting the air pressure equal to the desired outlet
fluid pressure. Continue to adjust the air pressure
relative to the outlet fluid pressure. Lower relative air
pressures produce more pulsation damping. Higher
relative air pressures produce better pump efficiency.
Start and Adjust the Pump
1. Be sure the pump is properly grounded. See
Ground The System, page 13 .
2. Check fittings to be sure they are tight. Use a
compatible liquid thread sealant on male threads.
Tighten fluid inlet and fluid outlet fittings securely.
3. Place the suction tube (if used) in fluid to be
pumped.
NOTE: Iffluid inlet pressure to the pump is more
than 25% ofoutlet working pressure, the ball
check valves will not close fast enough, resulting
in inefficient pump operation.
NOTICE
Excessive fluid inlet pressure can reduce
diaphragm life.
4. Place the end of the fluid hose into an appropriate
container.
5. Close the fluid drain valve.
6. Turn the air regulator knob to match the desired
fluid stall pressure. Open all bleed-type master
air valves.
7. Ifthe fluid hose has a dispensing device, hold it
open. Be sure all fluid shutoff valves are open.
8. Set the desired frequency on the VFD.
9. Press the start (run) button on the VFD.
10. Ifyou are flushing, run the pump long enough to
thoroughly clean the pump and hoses.
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