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Installing/mounting
4.4 Installation instructions
SITRANS LR250 with FOUNDATION FIELDBUS
34
Operating Instructions, 09/2021, A5E32221411-AH
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 167).
See Flanged Horn with extension (Page 196), Raised-Face Flange per EN 1092-1 (Page 225),
Flat-Face Flange (Page 227), and PTFE Flanged encapsulated antenna (3"/DN80/80A sizes and
larger) (Page 202) for dimensions.
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).
Hygienic encapsulated antenna leak detection port