G01
SPD Owner’s Manual
14
Detailed Disinfection Procedure
1) The SPD RO system, the product water distribution loop, and the inlet hoses to the attached dialysis
machines are disinfected together.
2) Insert key and turn keylock clockwise. Remove the front cover. With the system running normally in
the "Service & Rinse" mode, press the "Fill Tank" pushbutton.
When the tank is full, the solenoid valve filling it with product water will close.
3) Switch the mode from "Service & Rinse" to "Disinfection." The RO will need to be turned off and on
again to restart. As soon as it starts, open the Venturi Valve.
4) Then open the Product to Tank and the Reject to Tank Valves.
Now all the solution is circulated to and from the 5 gallon disinfection tank. If the tank looks too
full to accept the volume of disinfectant required, the Reject to Tank Valve can be closed briefly
to lower the level.
5) Inspect for any leaks.
6) Put on gloves and eye protection.
7) Measure out 350 ml of Renalin into a suitable container, and add the disinfectant to the 5 gallon jug.
Do not spill!!!!! Any spills of Renalin concentrate must be copiously rinsed and wiped up with a
sponge, towel or vacuum.
The disinfectant should be circulating through the pump, membrane modules, and back to the
disinfection tank. The disinfectant in the product water will cause the high conductivity alarm
lamp to illuminate.
8) After a couple of minutes, open the Flush Valve about 1/3 of the way. Operate the system for at
least 5 minutes in this fashion.
9) Open the Annulus Drain Valve for about 15 seconds.
This exposes the hidden annular volumes (dead spaces) in the membrane modules to
disinfectant.
10) Close the Product to Tank Valve.
The disinfectant laden product water will now flow through the distribution loop , the product
pressure regulators, and back to the pump inlet.
11) Open the Product Dump Valve for 10 seconds.
The SPD system has a Product Dump Solenoid Valve which opens automatically at high product
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