Maintenance
FLOWSIC100 Flare · Operating Instructions · 8013344/11L2/V 2-5/2018-10 · © SICK Engineering GmbH 207
Subject to change without notice
In principle, the single steps described in § 3.6.2 are carried out in the reverse sequence
(
→
pg. 114, Fig. 56).
Loosen fastening nuts (7) and take cotter pins (7) out of guide rods (8).
Hold the sender/receiver unit tight and pull it back slowly to stop.
Close the 2" (FLSE100-EXS and EXRE) or 3" (FLSE100-EXPR) ball valve (5).
A small amount of gas remains in the retractable nozzle and can escape uncontrolled
into the environment during disassembly of the sender/receiver unit from the ball valve.
Screw fastening nuts (9) on and insert the cotter pins in the guide rods.
Loosen fastening screws (3) and take the sender/receiver unit with seal (6) off the ball
valve 2" (or 3").
Fit blind flange (2) and seal on the ball valve 2" (or 3") with fastening screws (1).
5.3.2 Cleaning the sender/receiver unit
Clean the outside of the sender/receiver unit after it has been removed. Inspect the duct
probe and transducers for signs of corrosion and replace them if necessary. Dust deposits
and caked dust can generally be removed without disassembling the transducer.
Controlled venting is possible when using retractable sender/receiver units
with the vent device option (ball valve). To do so, connect the ball valve with
a suitable hose that ends away from the measuring point.
WARNING:
Take special precautions at toxic, aggressive, explosive, health
endangering and/or hot gases (risk or serious injuries) when using
retractable sender/receiver units without the vent device option.
The delivered seal may only be used once. Replace it with a new one after every
disassembly/assembly.
WARNING:
The transducer must be cleaned with extreme care. Do not damage the
transducer diaphragm!
Depending on the conditions at the installation site, the duct probe and
transducers may initially require maintenance more frequently (approx. every
2
weeks or less if necessary). If contamination is limited, the cleaning
intervals can be gradually extended to a maximum of 6 months.
Reinstall the sender/receiver unit after completion of the work.
The work required to replace parts (duct probe, transducers) is listed in the
FLOWSIC100 Flare Service Manual.
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