Safety Information
6
GA03108_002_C1 - 04/2018 - © Leybold
13
First open the cooling water discharge and then the cooling water sup-
ply. Otherwise a water pressure can build up in the pump which is too
high. When shutting off the cooling water supply proceed in the
reverse order: first shut off the water supply and then shut off the
drain.
14
The pumps must only be operated at the permitted speeds. Especially
when using frequency converters which have not been specifically
approved by Leybold, you need to ensure an effective protection
against overspeeding.
0.2 Electrical Hazards
1
Potentially lethal voltages are present at the mains connections.
Before beginning with any maintenance or service work on the
RUVAC, disconnect the pump from all power supplies (lockout/tagout).
2
The electrical connections must only be provided by a trained electri-
cian as specified, for example, by the regulations EN 50110-1. Note
the national regulations of the country in which the equipment is in
being operated.
3
Before initial commissioning install a suitable motor protection switch
for the electric motor. Please note the information given in these
Operating Instructions and on the electric motor (terminal diagram).
4
Before commissioning, check the junction box to ensure that it is
undamaged, perform a visual inspection on the seals.
5
Install add-on parts (pressure switches, for example) without any ten-
sions and protect these against damage by impacts, for example.
6
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. Observe the required standards
when designing and laying the electrical connections.
7
Provide strain relief for the connecting lines so that the plugs and the
line connectors are not exposed to excessively high mechanical stress-
es.
8
Lay the electric lines so that there is no risk of tripping over these.
9
The RUVAC must be integrated in the system control arrangement so
that the pump can not run-up automatically after it has been shut
down due to overtemperature of the motor. This applies equally to
emergency shut-down arrangements. After having determined the fault
cause, the pump should be switched on manually again.
10
The following applies to pumps being operated with a frequency con-
verter: after a mains power failure the pump will automatically start up
again once the power returns.
11
The temperature sensors (PTC, PTO) have basic insulation to the
motor winding. The operator must guarantee protection in the case of
indirect contact. For this purpose a monitoring device with galvanic
isolation can be provided from the temperature sensor to the pump
control, e.g. through thermistor machine protection devices by Eaton,
type EMT6-DBK.
WARNING
