IONPURE
®
LX CEDI Modules
Page 24 IP-MAN-LX-1220-EN.pdf
· Sodium percarbonate – for removing organic foulants, reducing pressure drop, and
sanitizing.
· Peracetic acid – used for routine sanitizing to discourage the growth of bacterial films.
· Aggressive multi-agent cleaning – this sequential cleaning protocol of caustic,
percarbonate, brine and acid is recommended for heavily biofouled systems.
NOTE: If you are unsure whether the module is scaled or organically fouled, flush
first with brine, then clean with NaCl/NaOH followed by brine followed by HCl.
6.3. Cleaning and Sanitization Prompts
The module may need CLEANING if:
· The product differential pressure increases by 50% without a change in temperature
and flow, or
· The reject differential pressure increases by 50% without a change in temperature
and flow, or
· The product quality declines without a change in temperature, flow, or feed
conductivity, or
· The module’s electrical resistance increases by 25% without a change in temperature.
· The above factors may indicate module fouling or scaling. Contact your Local Service
Provider to determine if the module needs cleaning or for the best cleaning procedure.
The system may require periodic SANITIZATION if
· The product water calls for low levels of bacteria (a user-specific requirement).
6.4. Clean-In-Place (CIP) System Construction
The main components of a clean-in-place (CIP) system are a tank, circulating pump,
cartridge filter, and various valves and hoses for connection to the CEDI system and
control of flows and pressures. The following general guidelines apply to CIP systems:
· Typical CIP system is shown in Figure 6.1
· All components of CIP system must be constructed of material
compatible with the cleaning solutions listed in Section 6.2. Plastics
generally work well with most cleaning chemicals.
· The tank should be large enough to accommodate solution volumes shown in
Section 6.7.
· It is best if the tank is fully drainable (false or conical bottom).
· Thoroughly flush all plumbing and other equipment before cleaning or sanitization to
remove debris or old chemicals that might damage the CEDI system.
· Flexible hose is ideal for connecting cleaning equipment to the system.
· The CIP pump must provide a minimum discharge pressure of at least 30 psig (2 bar)
and maximum pressure of 100 psig (7 bar) at the flow rate given in Table 6-1, below.
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