Siemens 6SE7087-8KN50 Instructions De Service page 298

Technical Data
11-12
The operating pressure is to be adjusted according to the flow
conditions in the supply and return sides of the water cooling system.
The volume of cooling water per unit time is to be set to within the value
given in Table 11-8.
This can be done, for example, by means of valves with flowmeter
(e.g. as made by "OSTACO Armaturen AG", CH-8902 Urdorf,
Tel. ++4117355555).
The flowmeters made by GPI (5252 East 36
KS USA 67220-3205 Tel.: 316-686-7361 Fax.: 316-686-6746) have
also proved very effective.
The user must take measures to ensure that the max. permissible
operating pressure is not exceeded. Use must be made of a pressure
regulating device.
Closed-circuit cooling systems are to be provided with pressure
balancing devices with safety valve
When the system is filled for the first time, the heat sinks have to be
vented (see Section 11.1.7 "Start-up").
Units larger than or equal to type J have a vent valve for this purpose.
On type E to G units there are no vent valves. Venting has to take place
externally via the free tap (see Fig. 11-3).
To ensure that the necessary volume keeps flowing, flushback filters
should be fitted instead of the normal pipe strainer. Flushback filters
automatically take care of the return flow.
These are manufactured by, for example, Benckiser GmbH,
Industriestrasse 7, D-69198 Schriesheim Tel.: +49-6203-730.
ASI 1 Information Bulletin E20125-C6038-J702-A1-7400 of February
1997 contains information about suggested plant configurations for
various applications.
Water piping must be laid with extreme care. The pipes must be
properly secured mechanically and checked for leakage.
Water pipes must under no circumstances make contact with live parts
(insulation clearance: at least 13 mm).
*)
≤ 1.2 bar at a permissible operating pressure of 1.0 bar, or ≤ 3 bar at a permissible
operating pressure of 2.5 bar
th
Street North Wichita,
*)
and air venting devices.
6SE7087-7KN50
Operating Instructions SIMOVERT MASTERDRIVES
08.2008
Siemens AG