Disinfection / Cleaning
Part 1 • Page 12-3
Part 1 – Operating Instructions
Rev. 4.00 December 2014
Software version 1.04
EcoRO Dia I/II (HT)
Part 1 • Ch
apter 12
7. Following disinfection (DI), the reverse osmosis system and loop are flushed with permeate.
The following tests are available for specifically testing for disinfectant residue:
– H
2
O
2
(peroxide test – Merck item no. 10011)
or
– Peroxyacetic acid (peroxyacetic acid test – Merck item no. 110084)
All permeate tapping points must be checked separately to make sure there is no disinfectant left in
the system. This check must be repeated to ensure there is no disinfectant left in the system after the
disinfected and rinsed RO has stood still for 30 minutes.
Table 12-1:
Disinfectant application concentration
Minncare Cold Sterilant is delivered as a concentrate that has to be diluted with water to a 1% or
3% solution.
To calculate the consumption of Minncare Cold Sterilant you have to add the volumes EcoRo Dia II HT
to the volume of the loop (including the surge tank).
Example:
Volume of EcoRo Dia I/II (with 2 membranes):
94l
+ Volume of loop (100m with diameter = 20mm):
31l
+ Volume of surge tank
25l
Total 150l
Divided by 100 =
1.5l
You have to fill 1.5l Minncare Cold Sterilant in order to get a 1% solution in the overall system.
You have to fill 1.5l x 3 = 4.5l Minncare Cold Sterilant in order to get a 3% solution in the
overall system.
Volume of EcoRo Dia II HT mainly depends on the number of membranes.
IMPORTANT The colouring of the test strips merely indicates that the disinfectant concentration is above
the limit to be determined by the test strip. It is not possible to determine the concentration
of a substance this way. The reaction time (with final concentration of disinfectant) is at least
15 minutes. The reaction time of the disinfectant in its diluted form on membranes must not
exceed 30 minutes and must be immediately followed by rinsing.
IMPORTANT Only use LMW-approved disinfectants.
LMW approved germicides
Conc.
pH
Minncare Cold Sterilant
1 %
3.5
Minncare Cold Sterilant
3 %
2.5
Number of membranes
Volume (l)
2
94
4
118
5
130
6
142
8
154
