Disinfection / Cleaning Part 1 • Page 12-1
Part 1 – Operating Instructions
Rev. 4.00 December 2014
Software version 1.04
EcoRO Dia I/II (HT)
Part 1 • Chapter 12
12. Disinfection / Cleaning
Disinfection of the EcoRO Dia I/II (HT) is carried out
• After commissioning and flushing of the preservative
• As a preventative measure
• When the microbiological action, warning or alarm limits are attained or exceeded
• After opening the system for maintenance or repair work or other constructional intervention
With EcoRO Dia HT systems disinfection can be carried out either thermical or chemical. Both disinfection
procedures are equal regarding their effectiveness. However, thermal disinfection does not require a test
for remaining residual disinfectant before system is brought back into operation.
12.1 General points
At the point of connection to potable water a backflow prevention (e.g. PPBA) must be installed!
The system must be disconnected completely from the mains supply line before disinfecting or cleaning
pretreatment. It is absolutely essential to disconnect the RO during disinfection or cleaning.
The system may only be disinfected or cleaned during the dialysis-free period.
Acute risk of poisoning!
• The permeate must be disconnected from the dialysis machines before the disinfection
process is started.
• It must not be possible to carry out dialysis!
The RO must be disinfected if the germ count is found to be higher than normal
(action limit: 50 CFU/ml).
After the RO has been at a standstill for > 72 hours, carrying out disinfection
is recommended.
An LMW reverse osmosis system may only be disinfected or cleaned by LMW-authorized
and trained personnel.
Before disinfection or cleaning:
• The Hydrowatch on the membrane surge tank (DG) must be checked before each
disinfection or cleaning process. If the red indicator is visible, the loop must not be
disinfected.
• To increase the effectiveness of the disinfection process, it must be ensured that the
membrane modules are free of organic and chemical contamination. The membrane
modules must be cleaned beforehand with a commercial membrane cleaner to
remove hardness salts or iron deposits on the membrane.
• Chemical disinfectants must comply with FDA requirements (Chemical disinfectants
and antiseptics: test procedure for bactericide basic action).
Hydraulic connection to municipal water supply must comply with local regulations!
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