aquaMAX
TM
– Ultra 370 Series
- 29 -
Note 2. Sanitization procedure for UF filter
Resist. State
15 M
Ω⋅
cm Stable
For UF version (aquaMAX
TM
-
Ultra
) or UV/UF version(aquaMAX
TM
-
Ultra
), it is the best to perform periodic
cleansing procedures every six month for longer life of UF filter and good water quality. To sanitize the UF filter,
it is necessary to use more than 60L feed water(R.O grade water of Deionized water).
1. Put 3g NaOH(Sodium hydroxide) into 50ml bottle and dissolve NaOH with ultra-pure water.
2. Push
SERVICE
key two times, then select
PRESSURE DOWN
mode.
- Confirm OK signal.
3. Power off the unit.
4. Open the door.
5. Remove 0.2
μ
m final filter and insert the tube(
∅
6) in use of sanitization into where the final filter has been
installed in counter-clock wise. The other end of tubes should be placed at drain.
6. Power on the unit.
7. Push the
SERVICE
key four times, then Push the
Production
key to select the Sanitize Unit.
8. “
Inject solution
” state will be displayed, then open the UF sanitization port.
9. Fill syringe with NaOH solution and inject NaOH solution into UF sanitization port.(NaOH should be used
after cooling down.)
10. After injection of NaOH, close the UF sanitization port.
11. Close the door.
12. Push the
Operate
key, and ,then, “First Sanitize(20min)” is diplayed.
-
After the First Sanitizing is operated for 20 minutes, and then “
Feed water”
is displayed.
-
If PE reservoir is filled feed water more than 20L, push the
Operate
key.
-
After the Second Sanitizing is operated for 20 minutes, and then “
Feed water”
is displayed.
-
If PE reservoir is filled feed water more than 20L, push the
Operate
key.
-
After the Third Sanitizing is operated for 20 minutes, and then display “
Check Resist
”.
-
Push the
Operate
key,
-
If resistivity of more than 15 M
Ω⋅
cm, state has “
stable
” value.----------------(1)
-
If resistivity of less than 15 M
Ω⋅
cm, state is “
reject
” value.---------------------(2)
