W&H Med MN-111, Instructions For Use Manual

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Lexa | Instructions for Use | MN-111 Med ENG Rev14 | 03/04/2023 | © W&H Sterilization Srl 93
Technical data
Water quality
FEED WATER SPECIFICATIONS (ANSI/AAMI AND AAMI TIR34)
The table below lists the specifications for the water used for steam
sterilization according ANSI/AAMI ST55 and AAMI TIR34. Following is
the Table 1 AAMI TIR34.
Units
Utility water
1
flushing/ washing/
rinsing
Critical water
finale rinse
2
/steam
Hardness
mg/L < 150
3
< 1
Conductivity µS/cm < 500 < 10
Total Dissolved
Solids
ppm < 350 < 6.5
pH
4
6 – 9 5 – 7
Chlorides
mg/L < 250 < 1
Bacteria cfu/mL n/a, <10
5
< 10
Endotoxin EU/mL n/a, <20
5
< 10
Note 1 : this is the quality of water that might come from the tap but might
need some form of treatment to achieve these specifications.
Note 2 : if this is the final rinse prior to sterilization of a critical device.
Note 3 : if hardness is greater than 150 mg/L, a water softener is
recommended unless used for washing and the cleaning chemistry is
capable of handling higher levels of hardness.
Note 4 : for boiler-treated steam, most boilers are treated to maintain a pH of
7.5 or 8.5. Any treatment of water that goes into boilers should be in
accordance with the sterilizer and boiler manufacturers' written IFU.
Note 5 : after high-level disinfection.
Notice :
The use of water with a conductivity greater than 10μS/cm (6.5
ppm) may affect the sterilization process and damage the sterilizer.
The use of water with a conductivity greater than 50μS/cm, or not
complying with the specifications in the table above, may strongly
affect the sterilization process and seriously damage the sterilizer.
The manufacturer’s warranty is void if the sterilizer was used with
water containing contaminant or chemical levels exceeding those
listed in the table above.