Marlo Incorporated RO-25T, Operating Manual, Page: 10 / 18

• Insert the Membrane up into the manifold. Automatic Shut Off Valve (A.S.O. Valve) will
(The O-rings should be up toward the man- start water production and the system will
ifold.) Check the Housing O-ring for proper refill the Holding Tank. When the Holding
position in its groove, engage and tighten Tank is full and no water is being used, the
the Housing Nut hand tight only. A.S.O. Valve will automatically shut off the
3. Rinsing the system: feed water to conserve water.
• Slowly open the Saddle Valve fully counter The more water that is used (up to the capaci
clockwise. ty of the system) the better the R.O. system
will function. Utilize other uses for the water
• The Holding Tank Valve should be open. such as flowers, pets and rinsing glassware
• Check the Air Gap Module to be sure that After periods of non-use such as a week's
the drain water is flowing vacation, it is better to empty the holding
tank and allow the system to produce fresh
The R.O. System is now making water. water for use. If the system is not used for
3-4 weeks or longer, it is a good idea to
• Do not open the Faucet for at least 6 hours. resanitize the system and to change the
SedimenttCarbon Prefilter and the Activated
• Do not use the first three full tanks of water Carbon Post Filter Cartridges
When the Faucet is first opened, expect air
and carbon fines (very fine black powder)
from the Carbon Filter to be rinsed out.
This is normal for the first tank of water or
after the Carbon Filter is changed.
B. Changing Filters
CAUTION : The R.O. Membrane is shipped THIS R.O SYSTEM CONTAINS FILTERS WHICH
with a preservative in it (1.0% sodium MUST BE REPLACED AT REGULAR /NTER
metabisulfite). This will be rinsed out with VALS TO MAINTAIN PROPER PERFORMANCE.
the first water produced. Allow the Holding USE ONLY FACTORY APPROVED FILTERS.
Tank to fill (overnight) and discard the first The recommended interval for changing the fil
three full tanks of production. It takes ters (not the R.O. Membrane) is every six (6)
approximately 6 hours to make a full tank. months. Typical T.F.C. Membrane life expectancy
is three years. Local conditions may dictate more
frequent changes.
SECTION V. OPERATION AND MAINTENANCE NOTE : If the R.O. Membrane is to be replaced, see
Sec.lV.F.1-3. page 9, for the proper procedure.
A. Normal Operation
Use a drip pan to catch any water that may spill
1. It is normal for the Total Dissolved Solids when the Filter Housings are removed. Refer to
(T.D.S.) of the water to be higher than nor- Fig. 1. page 3 for component location.
mal during the first 5 gallons of operation
this is due to the sanitizing solution and the
1. Close the Saddle Tapping Valve by turning
new Post Filter. After this water is rinsed to fully clockwise and open the Dispensing
drain the removal rate should stabilize at a Faucet by lifting the handle. Allow the
value of greater than 75%. The optional R.O. Holding Tank to empty.
Comparator measures the T.D.S. reduction
and gives an indication of proper perfor
2. Loosen and remove the Sediment/Carbon
mance. Water pressure affects the produc Filter and the Activated Carbon Filter Hous
tion rate and quality, see Sec. Vl, Technical ings. Discard the cartridges.
Data, page 11, for more details.
3. Wash the inside of the Housings using a mild
detergent and a soft cloth. Do not use abra
2. R.O. systems produce drinking water at rela sive cleaners or pads. Thoroughly rinse all
tively slow rates, it can take up to 6 hours or soap from the housings before reassembly
more to fill the Holding Tank. Normal opera-
tion is to let the Holding Tank fill with water
4. To sanitize the system and replace the filter
and then draw water as is needed. When the cartridges
pressure in the Holding Tank falls to a given
pressure (as the water is being used) the
NOTE : The system should be sanitized
before installing the Sediment/Carbon Prefilter
and Activated Carbon Post Filter Cartridges.