Siemens Sitrans LR250 - Hygienic Versions

Installing/mounting
4.4 Installation instructions
SITRANS LR250 with FOUNDATION FIELDBUS
Compact Operating Instructions, 09/2021, A5E48453221-AB
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Recommendations for flange bolting:
• Check bolts periodically, re-torque as required.
• Use new lens, O-ring and spring washers after removal from installation.
For instructions on replacing the lens, see Part replacement (Page 57).
For more details, see dimension drawings in full operating instructions.
4.4.3 Hygienic versions
WARNING
Loss of sanitary approvals
Loss of sanitary approvals can result from improper installation/mounting.
• Take special care when installing in hygienic or sanitary applications. Comply with
installation/mounting guidelines to ensure cleanliness and the ability to keep the wetted
parts in a position to be readily cleanable. (See relevant EHEDG/3A documentation - not
supplied).
NOTICE
Loss of sanitary approvals
• For 3-A Sanitary Approved device installation where the customer tank process
connection exists, a leak detection port of minimum 2.4 mm diameter must be provided
at the lowest point in the process connection where leakage can occur.
• If leakage is detected at any time while the device is installed, then the device process
connection parts must be disassembled and thoroughly cleaned prior to gasket
replacement and reassembly.
Note
•
For Hygienic encapsulated antenna, the lens acts as a gasket/seal and should be used in
conjunction with a cleanable seal as required by the specific process connections (for
example, DIN 11864-3).