Siemens SINAMICS S120 Manual page 41

Storage
The cabinet units must be stored in clean, dry rooms. Temperatures between -25 °C and
+55 °C are permissible (class 1K4 to IEC 60721-3-1). Temperature variations greater than
20 K per hour are not permitted.
If the cabinet is stored for a prolonged period once it has been unpacked, cover it or take
other appropriate measures to ensure that it does not become dirty and that it is protected
against environmental influences. If such measures are not taken, the warranty becomes
invalid in the event of a claim for damages.
The cabinet unit should not be stored for more than two years. If the cabinet unit is stored
for more than two years, the DC link capacitors of the power units must be reformed during
commissioning.
The reforming procedure is described in this Manual in the chapter titled "Maintenance and
servicing", section "Reforming the DC link capacitors".
CAUTION
Do not apply mechanical loads to the hoods!
The hoods (option M23, M43 or M54) are delivered separately and must be installed on
site.
Therefore the hoods must not be subjected to mechanical loads, otherwise they could be
destroyed.
Cabinet Modules
Manual, (GH5), 05/2010, A5E03263538A
WARNING
Mechanical installation
3.1 Important notes
41