Operator`s manual

WRO 300 H

P/N 3027436 Rev. C

Regular Maintenance

3 Regular Maintenance

3.1 Heat Disinfection

The required heat disinfection frequency to fulfil the desired microbio-

logical 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.

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

schedule should be based upon microbiological testing performed 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’s standards.

MCP recommends a minimum frequency of weekly heat disinfection to

ensure consistent microbiological quality of the product water.

If the WRO 300 H will not be used for an extended period of time, reg-

ular automated heat disinfection preset by the time channels will main-

tain the microbiological quality of the product water.

3.1.1 Heat Disinfection Procedure

The following paragraphs describe the heat disinfection of the WRO

300 H and the product water loop.

NOTE

The procedure below assume factory settings of the protocol.

NOTE

If the internal water temperature exceeds 45 °C when initiating the

preferred procedure the display reverts to the

SELECT menu or the

CHEM SELECT menu.

This situation is resolved by initiating RUN and letting the WRO 300 H

operate and perform an active cooldown until the temperature is

below 45 °C.

NOTE

The dialysis machine shall be turned off when the heat disinfection

procedure is performed.

NOTE

The heat disinfection procedure can also be initiated by the time chan-

nels. Further information of time channel settings refer to the Service

Manual.