SYSTEM MAINTENANCE
MANOWNROSM
US Filter
24
Aqueous solution of glycerin (by weight) or
propylene glycol mixed with sodium bisulfite
(by weight).
Formalin (see caution below)
Sodium Bisulfite
20% glycerin or propylene glycol, 1% sodium
bisulfite
1% Formaldehyde
1% Sodium Bisulfite
Table 4-3: Storage Solutions for Polyamide Thin Film Composite Cartridges.
CAUTION
New thin film composite cartridge MUST be operated for a minimum of 24
hours before contact with formalin, or a permanent reduction in flow rate
may occur.
4.3
MAINTENANCE SUMMARY LOG
(See Reverse Osmosis System Maintenance Log in the Appendix.)
NOTE:
The maintenance schedule for monitoring as outlined, is a minimum for the
protection of the reverse osmosis system. A more frequent monitoring
schedule may be necessary for patient safety. Consult your US Filter
representative for assistance.
A.
Feedwater
1.
Check pressure daily; record weekly. Adjust as necessary to maintain
0.69 to 6.9 bar (10 to 100 psi).
2.
Monitor feed and permeate conductivity and record weekly.
3.
If there is a possibility of the presence of chlorine in the feedwater,
measure free chlorine weekly. (It must be non-detectable or the
membranes may be damaged).
4.
If there is a possibility of significant pH variations (i.e. the feed is pH
controlled) monitor and record pH weekly by independent pH meter or
litmus paper.
5.
Measure total calcium monthly.
B.
Coarse Prefilter (If Applicable)
1.
Measure differential pressure daily; record weekly.
2.
Change prefilter when the differential pressure is greater than 0.69 bar
(10 psi) or every 6 months, whichever occurs sooner.
C.
Prefilter
1.
Measure differential pressure daily; record weekly.
