Yokogawa Advanced Reflux Sampler - Manual (Page 12)

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All Rights Reserved. Copyright © 2011, Yokogawa Electric Corporation. Subject to change without notice. April 2011 IM 11A00V01-01E-A
8. MAINTENANCE
When set-up and operated correctly, the YARS will require no routine maintenance other than filter cleansing, normally
during a routine de-coke cycle and/or shut-down.
8.1 Filter Section and/or Heat Exchanger Cleaning
To avoid filter section plugging, it is recommended that a routine steam clean be carried out on the filter section. Actual
site operating conditions will determine the optimal cleansing period and duration and this may typically be required every
3-4 months.
The filter section may be cleaned using steam and or any site approved solvents. After cleaning and/or replacement of
filter 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 filter 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” filter mesh pad assembly. This acts as a de-misting
pad and final heat transfer/filtration 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 filter.
8.1.2 Filter Section and Sample Outlet Temperature Gauge
Please follow the manufactures recommendations for calibration and adjustment of the filter section temperature gauge.
9. TROUBLE SHOOTING
The following may assist in trouble shooting and fault diagnostics:
9.1 Vortex Tubes
Insufficient air flow can be caused by the following:
1. Undersized compressed air supply line.
2. Compressed air line pressure too low.
3. Insufficient 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).