SnowPure Electropure EXL Series, Руководство по проектированию OEM

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SNOWPURE, LLC, 2005-2018 VERSION 3.5 (XL+EXL)
–FEBRUARY 2018
PAGE 79
Appendix #11: EDI Module Storage and EDI System Shutdown
SnowPure’s recommendations for module storage and for EDI system shutdown and
startup are based on our experience and our customers’ experience. The primary
criterion for how to store modules and shutting down systems is the prevention of
bacterial growth.
The actions suggested below depend on “ambient” temperature and length of
planned shutdown. When an EDI is in operation, its bacteriostatic properties usually
prevent bacterial colonies from propagating and growing. Bacteria will propagate
rapidly in ultrapure water
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from 25-
35˚C. If the system is under 15-18˚C, bacterial
growth is much slower.
Summary Matrix (suggested actions):
Less than 1 day 1 to 7 days 8 to 31 days > 1 month
Power
Generation

Normal shutdown

Normal startup

Normal shutdown

Startup with Regen*

Sanitize on shutdown

Startup with Regen*

Sanitize on shutdown

Drain and seal system

Sanitize on startup
General
Industrial

Normal shutdown

Normal startup

Normal shutdown

Startup with Regen*

Sanitize on shutdown

Startup with Regen*

Sanitize on shutdown

Drain and seal system

Sanitize on startup
Semiconductor
(bacterial
sensitive)

Normal shutdown

Startup with Regen*

Sanitize on shutdown

Startup with Regen*

Sanitize on shutdown

Drain and seal system

Sanitize on startup

Sanitize on shutdown

Drain and seal system

Sanitize on startup
Pharmaceutical
(highly bacteria
sensitive)

Normal shutdown

Check for bacteria on
startup

Sanitize if necessary or
according to policy

Sanitize on shutdown

Drain and seal system

Sanitize on startup

Sanitize on shutdown

Drain and seal system

Sanitize on startup

Sanitize on shutdown

Drain and seal system

Sanitize on startup
* “Startup with Regen”: in order to minimize any bacterial colonies present, a startup
sequence may include a 1-hour to 4-hour period of operation in regeneration mode.
This specifically includes operation at regeneration voltage (see Appendix 5).
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