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Make sure that the sliding surfaces do not become

damaged!

• Screw a new impeller fastener (cylinder screw with

socket hex and a new screw fixing) back into the

shaft. Fasten the impeller and tighten the fastening

screw.

• Place the pump unit on the sealing housing and

fasten it with screws.

• It must be possible to turn the impeller by hand.

Changing wear ring

The stationary and mobile wear ring determine the gap

between the impeller (mobile wear ring) and the intake

port (stationary wear ring). If this gap is too big, the per-

formance of the machine decreases, and/or it can lead to

entanglements.

Both rings are designed so that they can be replaced. This

minimizes wear on the intake port and and impeller, con-

sequently reducing expense for spare parts.

Changing sealing parts

Changing sealing parts on the liquid side such as the block

seal cartridge and the mechanical seal shaft requires a

certain amount of specialist knowledge about these sen-

sitive components. In addition to this, in order to carry out

the work, much of the machine must be dismantled.

Only original parts may be used for replacement!

Inspecting and replacing these parts is performed by the

manufacturer during the general overhaul or by specially

trained personnel.

For machines approved for work in areas subject to

explosion danger, please refer to the “EX-protection”

in the appendix.

8. Shutdown

8.1. Temporary shutdown

For this type of shutdown, the machine remains installed

and is not cut off from the electricity supply. For tempo-

rary shutdown, the machine must remain completely sub-

merged so that it is protected from frost and ice. Make

sure the operating room and the pumped fluid cannot be

covered by ice.

This ensures that the machine is always ready for opera-

tion. During longer shutdown periods, carry out a regular

(monthly to quarterly) function run for a period of 5 min-

utes.

Caution!
Only carry out a function run under the proper con-
ditions of operation and use. Never run the machine
dry. This can result in irreparable damage!

8.2. Final shutdown / storage

Switch off the system, disconnect the machine from the

electricity supply and dismantle and store it. Note the fol-

lowing information concerning storage:

9. Troubleshooting

In order to prevent damage or serious injury while rectify-

ing machine faults, the following points must be observed:

• Only attempt to rectify a fault if you have qualified

personnel. This means each job must be carried out

by trained specialist personnel, for example electrical

work must be performed by a trained electrician.

• Always secure the machine against an accidental

restart by disconnecting it from the electric system.

Take appropriate safety precautions.

• Always have a second person make sure the machine

is switched off in an emergency.

• Secure moving parts to prevent injury.

• Independent work on the machine is at one‘s own

risk and releases the manufacturer from any warranty

obligation.

Beware of hot parts!
When removing the machine, be careful of the tem-
perature of the housing components. These can heat
up to well above 40°C. Let the machine cool down to
ambient temperature before you touch it.

• Clean the machine.

• Store it in a clean, dry place, protect the machine

against frost.

• Place it down vertically onto a firm foundation and se-

cure it against falling.

• Seal the intake and discharge ports of pumps with

suitable material (such as foil).

• Support the electric connecting lead on the cable

lead-in to help avoid a permanent deformation.

• Protect the ends of the electric power cable from

moisture.

• Protect the machine from direct sunshine as a pre-