Operator`s manual

WRO 300

P/N 3027435 Rev. C

Regular Maintenance

3 Regular Maintenance

3.1 Chemical Disinfection

The required chemical disinfection frequency to achieve the desired

microbiological requirements for the product water depends on several

factors, such as:

• The quality of the feed water.

• Local regulations regarding the microbiological quality of dialysis

water, etc.

• Local preferences, for example regarding the use of chemicals.

No general rules can be given that cover all situations. The disinfection

schedule should instead be based upon microbiological testing per-

formed by the clinic. A maximum period between disinfections should

then be established to ensure acceptable bacteriological quality of the

product water according to the clinic standards.

As a guideline, MCP recommends a minimum frequency of weekly

chemical disinfection to ensure consistent microbiological quality of the

product water.

The use of an ultrafilter on the dialysis machine will remove possible

contaminants originating from the product water and may therefore be

used as a method to extend the time between chemical disinfection of

the WRO 300.

If the WRO 300 will not be used for an extended period of time, weekly

chemical disinfection will help maintain the microbiological quality of

the product water.

For certain peracetic acid disinfectants, the manufacturer recommends

that the WRO 300 be cleaned with an acid cleaning agent in accor-

dance with the cleaning instructions prior to chemical disinfection.

Refer to the section, Cleaning on page 23.

3.1.1 Approved Chemical Disinfectants

•MINNCARE

Cold Sterilant

Required amount: 50 ml of concentrated disinfectant

NOTE

The procedure below assume factory settings of the protocol.

CAUTION

Disinfectants may be toxic. Refer to the manufacturer Instruc-

tions.