Troubleshooting - VWR VP 8 Vac Manual Del Usuario

4. Place the top plate (5) on the head plate (6) in accordance with the
felt-tip pen marking.
5. Gently tighten screws (4) in diagonal order.
6. Insert screw (1) with disk springs (2, 3) in the center of the top plate
(5). In doing so, make sure that the disk springs are arranged
properly (see fig. 10).
7. Screw in the screw (1) in the centre of the pump top plate (5) until it
is flush with the top plate; then screw one final half turn to tighten.
8. Carry out steps 1 to 7 for the second pump head.
9. Refit the pneumatic head connection: Place tube onto the connecting
part of the angle fitting, turn angle fitting to a straight position and
tighten the union nut.
Final steps
1. Remount the pump to the baseplate.
2. Reconnect system tubing.
3. Insert the pumps power mains plug into the socket of the operating unit of system (5 in fig. 4, page 8).
4. Reconnect system to the electricity.
9.

Troubleshooting

Extreme danger from electrical shock!
 Disconnect the pump power supply before working on the pump.
 Make sure the pump is de-energized and secure.
DANGER
 Check the pump (see Tab. 7 to 11).
Flow rate, pressure or vacuum too low
The system/the pump does not achieve the output specified in the Technical data or the data sheet.
Cause
Condensate has collected in pump head.
There is gauge pressure on pressure side and
at the same time vacuum or a pressure above
atmospheric pressure on suction side.
Pneumatic lines or connection parts have an
insufficient cross section or they are throttled.
Leaks occur on connections, lines or pump
head.
Connections or lines completely or partially
jammed.
Head parts are soiled.
Diaphragm or valve plates/sealings are worn.
Fault remedy
 Detach the condensate source from the pump.
 Flush pump (see chapter 8.2.1).
 Change the pressure conditions.
 Disconnect pump from system to determine output
values.
 Eliminate throttling (e.g. valve) if necessary.
 Use lines or connection parts with larger cross
section if necessary.
 Check that tubes sit correctly on hose nozzles.
 Replace leaky tubes.
 Eliminate leaks.
 Check connections and lines.
 Remove the jamming parts and particles.
 Clean head components.
 Replace diaphragm and valve plates/sealings,
(see chapter 8.3).
English
1
2
3
4
5
6
7
8
Fig. 10: Refitting pump head
15