Operator`s manual

P/N 3027435 Rev. C
Regular Maintenance
24
WRO 300
Step 2 Follow the chemical disinfection procedure, but instead select
ACID CLEAN, or ALKALINE CLEAN in the CHEM SELECT
menu. Refer to Chemical Disinfection Procedure on page 18.
3.2.4 Test for Residuals
Step 1 Press until light goes on to start the WRO 300. Indication
lights and flashes.
Step 2 Collect a water sample from the product water line.
Step 3 The absence of cleaning chemical in the product water is
confirmed if the pH is within 1.0 pH unit of the feed water
value (checked with a suitable method) and if the conductivity
of the product water corresponds to the previously recorded
value.
Step 4 Confirm by pressing until the light goes out. Indication
remains lighted.
3.3 Long Term Storage
If the WRO 300 is to be taken out of operation for shorter periods of
time chemical disinfection can be used to maintain the microbiological
condition. This should be performed on a weekly basis or according to
the schedule based on a microbiological testing, refer to Chemical Dis-
infection on page 17.
3.3.1 Preservation
If chemical disinfection (according to Long Term Storage) is not possi-
ble to perform when the WRO 300 is taken out of operation for an
extended period of time (for example if electrical and water connec-
tions are disconnected) a chemical preservation has to be done.
3.3.1.1 Preservation Agent
Use MEMSTOR and dissolve 100 ml in two liters of potable tap water.
Warm water (35 to 40 °C) speeds up dissolution.
NOTE
The container can be empty before the intake phase is finished.