7. Dialysate Preparation
same type of tubing used in the standard concentrate line (part
number T010500).
WARNING
Instrument concentrate lines longer than standard will
affect the effectiveness of the heat clean and chemical
disinfection cycle.
CAUTION
It is essential that all central concentrate supplies be equipped
with a manual shut-off valve at each Instrument position.
These shut-off valves are required to prevent leaking when
service is performed on the concentrate regulator or trunkline.
These valves also prevent leakage when the female fitting shut-
off does not completely seal.
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•
•
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In large branching distribution systems, the concentrate
velocity is relatively slow at the ends where there are few
Instruments drawing from the concentrate supply. It is
important that the branch lines be of diameters consistent with
the expected flow rate. If this is not done, air purging and
concentrate change may be excessively slow.
In pump-driven concentrate supply systems, there should be a
return line from the end of each branch to the supply pump to
facilitate rapid concentrate movement.
In gravity-fed systems, this can be accomplished by means of
manual valves fitted at the far end of each distribution branch
line.
The central concentrate supply should be disinfected
periodically. Refer to your clinic’s procedures. It is important
to culture frequently and identify the organisms so that the best
means and schedule of disinfection may be prescribed.
WARNING
The concentrate lines from the central supply to the
optional panel mount fittings are NOT part of the
Instrument disinfection fluid path. These lines must be
disinfected by the methods used for the central
concentrate supply system.
157-1278-914 Rev A 7-19
January 2004
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