WaterBackpack PAUL, Manual

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PAUL
®
station manual page 33
PAUL Station Manual 2019-08-02 www.waterbackpack.org 02.08.2019
8.2 Taking PAUL
®
out of operation for a long period of time
If PAUL
®
has to be taken out of operation for a long time, e.g. for weeks or
months, the following is recommended.

Flush PAUL
®
with clean water according to chapter 6.2.1 until only clean
water comes out of the bottom or side outlet.

Fill PAUL
®
with at least 50 Liter of clean water (the membrane module
must be immersed).

Use a chlorine concentration in this water at about 1 mg/Liter (1 ppm) ac-
tive chlorine. Example: If PAUL
®
is filled with 50 Liter, you need 50 mg ac-
tive chlorine = 0.05 g active chlorine. See chapter 8.1 for further instruc-
tions.
The membrane can stand a chlorine load of 500,000 mg/(L*h). This means, that
with a concentration of 1 mg/L, the maximum time to expose the module to this
conditions (soaking time) is 500,000 hours (which is close to 60 years!), so
there will be no chlorine introduced damage to the membrane material.