GE F-801 User Manual

Page 44

F-801 Internal RO System by GE Osmonics

12552e – 27 Feb 04

4- 4

Routine Maintenance

Observe and record the pre-filter inlet and outlet pressure gauges on the
operation log. The difference in the pressure values will help measure the
condition of the filter cartridge. When the pressure differential (delta P)
increases 8 PSI above the clean, initial delta P, the cartridges need to be
changed (or sooner if the pre-filter core appears soiled). Refer to section 4.2 for
specific instructions on changing pre-filter.

Observe and record the percent rejection and TDS water quality readings in the
operation log.

Observe and record the pump pressure reading. It should be between 140 – 160
PSI. Adjustments may be made on the pump head. Refer to drawing section
for details.

Observe and record the product pressure reading. Reading should be 35 – 40
PSI (with F-801 product valve closed or connected to dialysis unit but not
operating). Adjustments to the product pressure may be made with the pressure
adjust regulator knob located inside the RO module.

NOTE:
After adjusting product pressure, verify that pump pressure is within normal
range.

Measure and record the feed water temperature if blending hot and cold water.

CAUTION:
Damage may occur to the RO system membrane if the incoming water
temperature is higher than 32°C (90°F).

WARNING:
Injury to the patient may result with water temperatures higher than 98°F.

NOTE:
Systems with blending valves usually have thermometers installed in the
plumbing. Hand held thermometers may also be used. The water temperature has
a significant effect on the flow rate of the RO membrane (refer to Technote 113
Temperature Correction Factor chart) and on the evaluation of the membrane's
need to be cleaned. Feed water temperature blending assemblies can be used on
portable RO units, however GE Osmonics does not supply them.

Disinfect the F-801 RO unit per established facility protocol (refer to
Disinfection Procedure) if RO unit has sat dormant for longer than 24 hours or
has been stored for long periods of time.