rev.1.1 Page 11-22
11. PREVENTATIVE MAINTENANCE
11.1 GENERAL
Maintenance personnel must exercise extreme caution as any leaking water may be
electrically charged
Check high voltage connection and grounding wires are tight every 3 months.
Do not externally clean E-Cell Stack™ using high pressure water.
Check for proper recovery ratio once per week (minimum).
Check feed water quality on a regular basis.
11.2 E-CELL STACK
™
CLEANING AND SANITIZING
11.2.1 Overview
Over time cleaning and/or sanitization of E-Cell Stacks
™
may be necessary, due to:
- hardness or other metallic scaling, mainly in the Concentrate and Cathode chambers
- fouling of the ion exchange medium or membranes with inorganic material (ex. silica)
- fouling of the ion exchange medium or membranes with organic material
- biological fouling of the E-Cell Stack™ and system piping and components
- combinations of the above
In some cases, more than one type of cleaning may be needed. The chart below
summarizes the scaling and fouling conditions and the cleaning/sanitizing procedures best
suited to correct the condition.
The MK-2PharmHT and MK-2Mini HT Stacks™ can be sanitized at high temperature (80
o
C /
176
o
F.) For instructions, refer to the separate MK-2 Pharm-HT Mini-HT Sanitization
Procedure.
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