9. Disinfection
When the Heat Disinfection Mode is initiated, the following events
occur:
• The disinfection program name is displayed in the Instrument
mode area (lower left).
• A data report with the disinfection program appears on the
screen.
• Recirculation and rinse valves open.
• The water on/off valve is closed.
• The bypass valve toggles.
• The flow rate is set at 500 mL/min.
• The air removal pump speed is lowered by 2/3.
• The desired “dialysate” temperature is set to 85°C (97°C at the
heater output).
WARNING
Manually starting Cool Down will abort the Heat
Disinfection Mode. If Heat Clean is cancelled before
completion, the Instrument must not be used on a
patient until it is properly disinfected. This can be done
by completing a Heat Clean cycle, or by performing a
dwell Chemical Disinfect. Do not use single pass
disinfectants because they will not completely disinfect
the Instrument once any procedure with recirculation
has been initiated and cancelled.
The supply pump rate is fixed after approximately 3 minutes of
elapsed heat clean time.
The time required for the fluid path temperature to reach values
required for disinfection (85 to 95°C) is largely dependent on the
operating conditions of the Instrument when the Heat Clean cycle
is initiated. The Heat Disinfection Data Report displays the heat
clean steps along with their estimated remaining time and the total
estimated remaining time for the cycle.
If a dialyzer connector is removed from the rinse block, the
Instrument will go into bypass and the following message will
appear.
“Put Dialyzer Connectors on Rinse Block!”
Once the dialyzer connectors are back on the rinse block, the
following message will also appear.
“Please Take the Machine Out of Bypass!”
157-1278-916, Rev A 9-7
March 2004
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