Barnstead Mega-Pure Series 798, Инструкция по эксплуатации и список запасных частей

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21
Troubleshooting
General
M
AINTENANCE AND
S
ERVICING
Problem Causes Solution
Leaks. The most common leak is one
occurring in the vinyl drain
tubing. Hot water causes
softening and pulling loose at
the plastic barbed connectors. Runs of vinyl tubing should be
supported to reduce the pull
on the plastic connectors.
Small clamps may be used to
firmly hold the vinyl tubing.
Rough Boiling. Rough boiling is the result of
alkali attack to the matte finish
on the heaters. The most
common cause is using water
pretreated with NaCI
regenerated water softeners. Remove heater and lightly
roughen surface with 150 grit
sandpaper.
Scale Build-up. A brownish-white scale in the
boiler indicates that the boiler
requires cleaning. Clean boiler per cleaning
instructions. Scale should not
be allowed to accumulate as
heaters may be damaged.
Heater Failure.
Heater failure due to scale
build-up or alkali attack will
not be replaced under
warranty.
Short life on Vycor®
immersion heaters can usually
be attributed to use of water
pretreated with NaCI
regenerated water softeners
or excessive scale buildup.
Softened water used as a
boiler feed causes a
concentration of sodium ions
and alkaline attack of the
Vycor® glass. Rough boiling
will be the first indication of
alkaline attack. At failure, the
heaters will usually pinhole
and water entering will short
out the element.
Scale build-up will occur when
boiler feed is not being
deionized.
If softened water must be
used, heater life can be
prolonged somewhat by
draining boiler every day.
When using the still without a
deionizer, scale build-up must
be removed after every 15-20
hours of operation (see
"Cleaning Instructions").
Failure to do so will cause
heaters to build up heat
internally and fail or cause
glass envelope failure.