21
J. FREQUENTLY ASKED
QUESTIONS (FAQ)
What does the System do?
This System has been tested to significantly physically
block pathogens including bacteria, viruses and cysts
from your water. The pore size on the surface of the
ultrafilter membrane is 0.02 microns nominal. The
System has been certified by NSF International for NSF 42
and 53 (aesthetic and health claims) for the removal of
Cysts, Turbidity, Particulates and Chlorine. Further test
results from BioVir Laboratories in California include
bacteria and virus reduction performance. Please refer to
C. CERTIFICATION
for more information.
Where should the System be installed?
The System is installed inside the home at the point
where water enters the house so that filtered water is
provided from every tap. In order to allow only indoor
water to be treated, a dedicated line should be installed
from the inlet of the System to all external taps for pool or
hot tub makeup valves and irrigation systems. Reducing
the volume of water filtered will assist in prolonging the
life of the System membrane. For Spacing Requirements
refer to
I. SPECIFICATIONS.
Does the System require electricity?
In most installations, the System runs on existing
household water pressure provided that a minimum
pressure of 30 psi is met. Unless electricity is required
for pump operation, the System will continue to filter water
during a power failure and Controller settings will be
saved by battery backup power. The Controller must be
plugged into a standard electrical outlet to provide power
to operate the solenoid valves that initiate flushing of the
System. If electrical power is not available, the System
will not conduct automatic cleaning and the rate of fouling
will increase.
How does the System work?
Filtering -
When a household water fixture is turned on,
the water pressure forces unfiltered water into the Prefilter
Housing.
(1).
Larger particles (and chlorine when using the Carbon
Prefilter) are removed as the water passes from the
outside of the Prefilter to the inside.
(2).
The prefiltered water then passes down into the
System to the membrane chamber.
(3).
In the membrane chamber, the water travels through
membrane pores from the outside of the hollow fibre
membrane to the inside, leaving behind unwanted
particles such as bacteria, parasites and certain viruses.
(4)
. The filtered water then travels through the household
piping, to the household fixture that is being used.
Automatic Cleaning Cycle
- The System uses two
methods to clean its membrane: a) flushing and b)
draining. The Controller automatically executes a cleaning
sequence consisting of a number of flushes and drains to
clean the membrane. For Systems equipped with an
Advanced Plus Controller, System cleaning may be
performed multiple times per day, up to 24 times. For
choices of cleaning sequences and intervals, refer to the
Controller Settings
section under
D. OPERATIONS.
Water
pressure inside the dwelling will be significantly reduced
during System cleaning.
Flushing
: Flushing includes a Front-flush and a Back-
flush. Systems that are installed in municipal, cistern, or
ground water sources may use the flushing method to
control the fouling rate of the membrane.
(5)
. Front-flush - The Controller opens the Drain Solenoid
Valve. The water supply line pressure causes an inrush
of water into the System, scouring the surfaces of the
membrane and expelling impurities through the drain.
(6).
Back-flush - At the same time, the air bladder inside
the Backpulse Tank expands rapidly, pushing clean water
out of the membrane surfaces from the hollow cores.
This action dislodges and pushes out impurities trapped
inside the membrane pores. Impurities are then expelled
out of the System through the drain port.
Draining:
Systems that are installed in surface water
sources must use the draining method in addition to the
flushing method to control the fouling rate of the
membrane. During draining, the Controller closes the
Inlet Solenoid Valve and opens the Drain Solenoid Valve,
allowing water to be completely drained out of the
System.
Summary of Contents for UFC 207
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