7 Before beginning with any maintenance and servicing work always
ensure that no gas can flow backwards through the pump since then
the rotors might turn against the normal direction of rotation. For this
reason vent the vacuum chamber to the exhaust pressure level or
ensure through suitable valves that the vacuum chamber and the lines
are reliably separated from the pump. When connecting several pump
systems, pressure differences between inlet and discharge can give
rise to uncontrolled turning of the pump’s shafts.
8 Lay the electric feed lines so that there is no risk of tripping over these.
9 The warning information on the pump must not be covered.
10 When changing the oil remove any escaped oil as otherwise there is
the risk of slipping.
0.2 Electrical Hazards
1 The electrical connection must only be provided by a trained person.
Please observe the national regulations in the country of use like
EN50110-1 for Europe, for example.
2 Lay the connecting lines so that they cannot be damaged. Protect the
lines against humidity and contact with water. Avoid thermally stressing
the lines due to unfavourable laying.
3 Note the information on the type of protection.
4 The pump must only be operated at the frequency specified for the
motor even when operated off a frequency converter.
When using frequency converters you must ensure an effective protec-
tion against overspeeding.
5 Always operate the pump with a properly connected protective earth
conductor.
6 The pump must be integrated within the system controller such that
the pump can not run up automatically when the pump has been shut
down before due to an overloaded motor.
This equally applies to any emergency shutdowns. After having
removed the fault cause, the pump must be switched on manually
again.
7 Before starting with any maintenance or servicing work reliably discon-
nect the pump from all sources of power (lockout/tagout).
8 High electric voltages! When touching parts at high electric voltages,
there is the risk of suffering severe injuries by an electric shock! Covers
marked with this symbol must only be opened by trained electricians
after having reliably deenergised (lockout/tagout) the equipment.
9 Observe the manufacturer’s information and the Operating Instructions
for the respective frequency converter.
10 After having connected the motor and each time after having made
changes to the wiring, check the direction of rotation. If the direction of
rotation is wrong, the pressure can increase on the intake side.
Moreover, the pump can suffer severe damage.
DANGER
To Next Page
Loading...
