Katadyn Spectra Watermakers Catalina 340R, Installation And Operating Manual

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Introduction to Spectra Chemicals - Cont.
Complete microbial protection requires a 25% solution of propylene glycol, so care must be
taken that the solution remaining in the watermaker during long term storage is at least 25%,
even if freeze protection is not required. For these reasons Spectra recommends that all
pickling be carried out with a 60% or greater concentration.
See Winterizing with Propylene Glycol .
Propylene glycol can be difficult to flush from a membrane, especially after extended storage
periods. This results in high salinity water (high PPM) and residual flavor in the product water.
We recommend flushing the system WITH THE PRESSURE RELIEF VALVE OPEN for 4
- 6 hours
after storage with propylene glycol—the longer the better. If, after extended flushing, you still
experience low product water quality, cleaning with SC
- 2 usually removes all traces of
propylene glycol and returns the salinity to the level it was before storage with propylene
glycol. See the
Membrane Cleaning Procedure .
Cleaners
Avoid unnecessary cleaning, and avoid cleaning as a diagnostic tool.
SC - 2 is an alkaline cleaner used to remove light oil, grime and biological growth. It is most
effective if heated to 120 deg. F (49 deg. C). In most cases the water quality will increase in
PPM (salinity) after an SC
- 2 cleaning. After a few hours it should recover to near the level it
produced before the cleaning
.
SC - 3 is an acid cleaner used to remove mineral and scale deposits. In most cases this is used
first and if there is no improvement, go on to the SC - 2 cleaning. SC - 3 will in most cases lower
the product PPM and overall pressures. Scaling is a slow process that may take several months
or years.
For cleaning with either SC - 2 or SC - 3, see Membrane Cleaning Procedure .
Maintenance Cont.