F-801 Internal RO System by GE Osmonics

4.1.2Weekly Maintenance

1.Observe, or measure, and record the waste and product flow rates on the operation log. Allow the water temperature to stabilize before attempting to record the results. This will help prevent errors due to fluctuating temperature.

a.Waste flow 2000 ml/min (±10%)

b.Product flow 1580 ml/min (150 PSI pump pressure and 25 C feed water temperature) with product line disconnected from dialysis machine and line open to atmosphere. Refer to Technote 113 for Temperature Correction Factors.

2.Observe, or measure, and record the feed water temperature. Systems with blending valves have thermometers installed in the plumbing. A hand held thermometer may also be used. The water temperature has a significant effect in the product flow rate of the RO membrane and on the evaluation of the membranes’ need to be cleaned.

3.Disinfect the system if needed. Refer to the disinfection procedure in this chapter.

4.1.3Monthly Maintenance

1.Take a product water culture to test for bacteria colony forming units count (<200 cfu/ml). Refer to the product water culture procedure in this chapter. Disinfect if results indicate higher cfu count.

NOTE:

Water cultures should be taken prior to disinfection and after disinfection to determine effectiveness.

2.Visually inspect the pre-filter core, if you are using cartridge pre-filtration.

CAUTION:

On occasion, the pressure differential between the two pre-filter gauges will not alter significantly, however, the pre-filter will be soiled. If the core of the pre- filter is dirty, particulates are breaking through the pre-filter and traveling downstream and causing damage to the pump and RO membranes. If this is the case, the pre-filter will require more frequent replacement on a routine basis.

3.Check the pump pressure settings. The pressure should be 150 PSI ± 10 PSI, and should not exceed 200PSI.

4.Check the product pressure setting. Adjust the pressure as needed with the regulator inside the cabinet.

5.Perform trend analyses from the log sheets.

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Routine Maintenance