User Manual
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All Rights Reserved. Copyright © 2011, Yokogawa Electric Corporation. Subject to change without notice. April 2011IM 11A00V01-01E-A
8. MAINTENANCE
When set-up and operated correctly, the YARS will require no routine maintenance other than lter cleansing, normally
during a routine de-coke cycle and/or shut-down.
8.1 Filter Section and/or Heat Exchanger Cleaning
To avoid lter section plugging, it is recommended that a routine steam clean be carried out on the lter section. Actual
site operating conditions will determine the optimal cleansing period and duration and this may typically be required every
3-4 months.
The lter section may be cleaned using steam and or any site approved solvents. After cleaning and/or replacement of
lter mesh, ensure any traces of cleaning solvents have been removed to avoid any analytical cross contamination when
the unit is returned to service.
The heat exchanger section should not ordinarily require any cleaning, however it is possible to introduce steam through
the sample outlet port located at the top exit of the sampler. Ensure the outlet temperature indicator is isolated from the
steam during heat exchanger cleansing.
If required, a replacement lter cartridge may be installed – Refer to factory for details.
CAUTION
When using steam, ensure all appropriate safety precautions are OBSERVED ~ avoid accidental burns!
8.1.1 Heat Exchanger Filter Mesh
Located inside the top heat exchanger section of the sampler is a 4” lter mesh pad assembly. This acts as a de-misting
pad and nal heat transfer/ltration device prior to sample outlet. It is constructed of stainless steel and may be steam
cleaned or replaced as needed. Refer to factory for replacement lter.
8.1.2 Filter Section and Sample Outlet Temperature Gauge
Please follow the manufactures recommendations for calibration and adjustment of the lter section temperature gauge.
9. TROUBLE SHOOTING
The following may assist in trouble shooting and fault diagnostics:
9.1 Vortex Tubes
Insucient air ow can be caused by the following:
1. Undersized compressed air supply line.
2. Compressed air line pressure too low.
3. Insucient compressed air volume (SCFM).
4. Partial or complete blockage of internal compressed air path due to dirt, etc.
5. Compressed air line temperature too high.
6. Loose cold cap (if disassembled for cleaning).