Operator`s manual

P/N 3027436 Rev. C

Regular Maintenance

WRO 300 H

3.2.5 Central Chem

The central chem disinfects the WRO and also sends disinfectant into

the dialysis machine. For more detailed information on how to perform

central chem together with Gambro

dialysis machines, please contact

Technical Service.

Follow the Chemical Disinfection Procedure on page 19, but start at

Step 3 and follow the instruction through Step 13.

In Step 8 select the preferred central chem protocol in the CHEM

SELECT menu.

3.3 Cleaning

3.3.1 Warm Acid Cleaning

Warm acid cleaning should be performed when:

• Rejection rate has decreased by more than 5 percent from initial

value.

• Sufficient output flow is not obtained.

• As preventive measure when a softener is not used.

• As a method to remove transitional metals from the RO membrane

prior to chemical disinfection.

CAUTION

If the produced disinfection solution is fed into a device other

than Gambro

dialysis machines, it is the user’s responsibility

to ensure that the connected device is compatible with perace-

tic acid disinfectants and to establish the procedure for the

WRO in combination with the connected device.

CAUTION

As the disinfection solution produced by the WRO will enter

any device connected to the quick connector on the product

water loop, residual test after disinfection must be performed

on the connected device in accordance with the Operator’s

Manual for the connected device.

NOTE

During the intake phase of the central chem program, the product

water loop will not be pressurized until the correct conductivity has

been obtained, which will take a few minutes.

CENTR_CH_PHX