GE Z-14400 - Manual (Page 51)

Z Series RO System by GE Osmonics
3. With the RO unit operating normally, adjust the TDS alarm selector switch so that
the TDS valve exceeds the TDS alarm set point and check the following;
a. Verify the product divert indicator illuminates and the divert valve rotates
open for the duration of the alarm condition.
4. With the RO unit operating in the condition listed above, adjust the TDS alarm
selector switch so that the TDS value is lower than the TDS alarm set point and
check the following;
a. Verify the product divert indicator shuts off and the divert valve rotates
closed after an approximate one-minute alarm removal delay
5. Reconnect the Product Divert Valve drain line to the drain.
4.2.3 Temperature Setting and Function Test
NOTE:
To perform this test you will need a thermometer and a water bath that can be
temperature controlled from 85 F to 95 F.
1. Remove the temperature probe from the thermal well.
2. Insert the end of the temperature probe into the 85 F water bath that without
submerging beyond the threads.
3. Allow the probe to acclimatize for a minimum of 5 minutes.
4. Slowly increase the water bath temperature until the monitor indicates (red light)
“RO Unit Interlock”. Check the water bath temperature with a thermometer for
90 F ±1 F. Adjust the set point as required.
NOTE:
The set point is adjusted through the hole on the left side of the monitor with a
screwdriver. Clockwise rotation reduces the temperature set point and counter clockwise
will increase the temperature set point.
5.
Check that the RO unit shuts down at the alarm set point.
6. Switch the Override Switch on the monitor from normal run to the Override
position. The RO unit should start up and the Override indicator lamp will light.
7. Switch the Override Switch from the Override position to the normal run position.
The RO unit should stop running if the temperature is over the set point of 90 F.
8. Slowly reduce the water bath temperature until the Monitor’s temperature
switches from the alarm condition to normal operation. The RO unit should
return to normal operation.
9. Log all set point and calibration data.
10. Replace the temperature probe into the thermal well.
1238339b – 16Oct03 4 - 7 Routine Maintenance