Specifications

20
How Your RO Water System Works
INTRODUCTION: Your Reverse Osmosis (RO)
Drinking Water System uses your household water
pressure to force water through three filters. Minerals
and impurities are filtered out. Delicious tasting drink-
ing water goes to the storage tank-ready for your use.
Minerals and impurities are sent down the drain. The
following paragraphs will explain in detail how your
Reverse Osmosis Drinking Water System works.
PREFILTER: Water from the cold supply pipe enters
the prefilter. See Fig. 28. The prefilter is a replaceable
sediment cartridge with activated carbon in its compo-
sition. The cartridge reduces taste, odor, sand, silt, dirt,
other sediments, and up to the amount of chlorine
shown in the specifications.
REVERSE OSMOSIS CARTRIDGE: Filtered water
flows from the prefilter to the Reverse Osmosis mem-
brane cartridge. See Fig. 28. The Reverse Osmosis
cartridge is a tightly wound special membrane. The
membrane reduces the dissolved solids and organic
matter. High quality product water (about one ounce
per minute) exits the Reverse Osmosis cartridge. The
product water flows to the storage tank, postfilter or
Reverse Osmosis faucet. Drain water, with the dis-
solved solids and organic matter, is routed to the drain.
STORAGE TANK: The storage tank holds product
water. See Fig. 28. A diaphragm inside the tank holds
water pressurized to about half of supply water pres-
sure when the tank is full. This provides fast flow to the
Reverse Osmosis faucet. When the tank is empty of
water, the pressure at the air valve is 5 - 7 psi.
POSTFILTER: Water goes through the postfilter before
going to the Reverse Osmosis faucetr. See Fig. 28.
The postfilter is an activated carbon type filter. Any
remaining tastes and odors are reduced from the prod-
uct water. Clean, high quality drinking water is avail-
able at the faucet.
REVERSE OSMOSIS FAUCET: The sink or counter-
top faucet has a hand operated knob to dispense
drinking water. See Fig. 28. An air-gap is built into the
faucet drain water connection to comply with plumbing
codes. See Fig. 28.
FAUCET ELECTRONICS: The RO system will monitor
the total flow of the unit and also length of time the fil-
ters have been installed. The faucet base has an indi-
cator light that flashes to inform you of the status of
the RO membrane and filters.
Green - RO membrane and filters are good.
Amber - Warning, filters need replacing. Filters need
replacing after 6 months during which water has been
drawn (or 750 gallons have been used).
Red - RO membrane needs to be replaced.
When the coin battery is first applied at initial start up,
the LED indicator light will flash in a red, amber, green
sequence. All timers and counters are reset to zero. In
order to reset the time and gallon count feature, push
the button on the PWA and hold until the LED flashes
and release. The battery needs to be replaced at the
time of filter replacement. Use only lithium batteries (CR
2032 or equivalent). Improper placement of battery could
damage electronics. Use care when inserting battery to
align it correctly on PWA with the proper polarity.
SHUTOFF ASSEMBLY: The unit has an automatic shut-
off system to conserve water. When the storage tank has
filled to capacity, and the drinking water faucet is closed,
pressure closes the shutoff to stop flow to the drain. After
enough drinking water is used, pressure in the
system drops, and the shutoff opens to allow the tank to
be refilled. See Fig. 28.
CHECK VALVE: A check valve is located in the Reverse
Osmosis manifold above the center sump. The check
valve prevents a backward flow of product water from
the storage tank to drain. A backward flow could
damage the Reverse Osmosis Membrane. See Fig. 28.
FLOW CONTROL: Water flow to the drain is restricted
by the flow control. It maintains the desired flow rate to
obtain the highest quality drinking water. The flow control
is located inside the elbow fitting on the Reverse
Osmosis manifold drain port. See Fig. 28.
Battery
FIG. 27
PWA Board
Reset Button