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SECTION I.   INTRODUCTION 

  Your new Reverse Osmosis (R.O.) Drinking Water 

System uses a combination of filtration technologies 

to reduce unwanted contaminants in a water supply. 

The following steps combine to give you the best in 

clear sparkling drinking water: 

 

MECHANICAL FILTRATION/ACTIVATED 

CARBON

–The Sediment/Carbon Prefilter has 

been designed to reduce the larger particles 

such as silt, rust and scale. Its 5 micron 

(equal to 0.0002 inch) nominal rating helps 

to give maximum life to the R.O. Membrane.

 

The activated carbon in the Prefilter has been 

designed to reduce any chlorine that may be 

present in the feed water. This pretreatment is 

also necessary for membrane protection.

 

REVERSE OSMOSIS MEMBRANE

–The R.O. 

Membrane is the heart of the filtration system. 

It is designed to reduce the dissolved mineral 

content of the water. Minerals picked up in the 

environment by the water are measured as Total 

Dissolved Solids (TDS). In the Reverse Osmosis 

process, dissolved minerals are separated from 

the incoming water (Feed Water) to produce 

the product water (the Permeate). The excess 

minerals are rinsed to drain (the Reject Water). 

  The membrane is a specially constructed, fully 

aromatic polyamide film, and is classified as a 

Thin Film Composite (T.F.C.).

  The spiral wound construction of the R.O. 

Membrane provides maximum surface area 

for water production and is less susceptible 

to fouling by particulate matter, turbidity and 

colloidal materials. 

 

ACTIVATED CARBON

–The Activated Carbon 

Post Filter contains carbon particles with a vast 

network of pores. The tremendous surface 

area of these pores (typically 800–1200 square 

meters per gram of carbon) gives the carbon 

very good adsorptive sites for substances that 

contribute to tastes and odors. 

 

IN–LINE ACTIVATED CARBON POST FILTER

The In–Line Activated Carbon Post Filter is 

located after the Holding Tank and has been 

designed to reduce the tastes and odors that 

may pass through the system. It adds a final 

polish to the water. 

 

AUTOMATIC SHUTOFF VALVE

–The 

 

ASO Valve senses when the product water 

tank is full and closes the feed water supply to 

prevent excess reject water from going to drain 

when the unit is not producing water.

 

WATER QUALITY MONITOR

–The optional 

Water Quality Monitor has been integrated 

into the faucet base for instant monitoring at 

the touch of a button. The monitor compares 

the level of the Total Dissolved Solids in the 

incoming (feed) water versus the product water 

and calculates the percent rejection. The monitor 

is preset to indicate a level of 75% rejection. 

  A green light indicates that the percent rejection 

is at or above the set (desired) value and that 

the system is producing quality water. 

  An amber light indicates that the product water 

quality is less than acceptable. Because the 

Water Quality Monitor was designed to operate 

best while the system is making water, a false 

reading may occur if tested when your R.O. 

drinking water system is not making water. 

Please empty the storage tank, wait 15 minutes 

for the system to begin making water, and test 

your water quality again. If the Water Quality 

Monitor light is still amber, please contact a 

water treatment professional for service. The 

Water Quality Monitor requires a 9 volt battery, 

which is included. Systems not equipped with a 

Water Quality Monitor contain a Water Quality 

Test Kit.

IMPORTANT NOTICES:

This reverse osmosis system contains replaceable treatment components critical for effective performance. It is the 

user's responsibility to, and the manufacturer strongly recommends that the user, periodically test the product water 

to verify the system is performing satisfactorily. See the test kit(s) for sampling instructions.
This system is acceptable for treatment of influent concentrations of no more than 27 mg/L nitrate and 3 mg/L nitrite 

in combination measured as N and is certified for nitrate/nitrite reduction only for water supplies with a pressure of 

280 kPa (40 psig) or greater.
This system conforms to NSF/ANSI Standard 58 for pentavalent arsenic reduction. See the Performance Data 

Sheet and Arsenic Facts section for an explanation of reduction performance.

DO NOT USE WITH WATER THAT IS MICROBIOLOGICALLY UNSAFE OR OF UNkNOWN QUALITY, WITHOUT 

ADEQUATE DISINFECTION BEFORE OR AFTER THE SYSTEM.

 

Systems certified for cyst reduction may be used on disinfected water that may contain filterable cysts. 

Summary of Contents for MRO-35

Page 1: ... by NSF International against NSF ANSI Standard 58 for the reduction of the claims specified on the Performance Data Sheet Millennium Reverse Osmosis Drinking Water System Model MRO 35 INSTALLATION OPERATION SERVICE MANUAL ...

Page 2: ...ertains to people with HIV AIDS patients receiving treatment for cancer recipients of organ or bone marrow transplants transplant patients taking immunosuppressive drugs and persons who have congenital immunodeficiencies The EPA has stated that they do not know the significance of drinking water compared to other possible sources of Cryptosporidium to determine how most people become infected The ...

Page 3: ...er supply to prevent excess reject water from going to drain when the unit is not producing water WATER QUALITY MONITOR The optional Water Quality Monitor has been integrated into the faucet base for instant monitoring at the touch of a button The monitor compares the level of the Total Dissolved Solids in the incoming feed water versus the product water and calculates the percent rejection The mo...

Page 4: ...that is available to the user as reverse osmosis treated water when the system is operated without a storage tank or when the storage tank is bypassed Efficiency rating means the percentage of the influent water to the system that is available to the user as reverse osmosis treated water under operating conditions that approximate typical daily usage This reverse osmosis system contains a replacea...

Page 5: ...e screws and nuts for mounting the manifold or concrete anchors for hanging on basement wall Additional tubing or tube connectors Plastic wire ties for organizing tubing TYPICAL mro 35 UNDER SINK INSTALLATION DIAGRAM Figure 1 The Water Quality Monitor may be necessary to conform to state or local codes check with the local plumbing authority Dispensing Faucet with Air gap drain clamp drain 3 8 Bla...

Page 6: ... POST filter housing Reverse osmosis membrane housing sediment CARBON prefilter housing BASEMENT FLOOR please note if air gap in faucet is not used in basement installations a proper air gap must be created please check with local plumbing codes see example above FLOOR FEED water saddle valve cold water line only INLET 1 4 Red DRAIN 1 4 Black 1 air gap required POLYTUBE TEE IN LINE ACTIVATED CARBO...

Page 7: ...ing of water pitchers and glasses and an open area beneath the faucet under the sink for attaching product and drain tubing are considerations A 2 diameter flat surface is required above and below the installation site The thickness of the mounting surface should not exceed 1 Watch for strengthening webbing on the underside of cast iron sinks 2 Drinking Water Holding Tank The Holding Tank may be p...

Page 8: ...ps Install the punch and tighten the nut to cut the hole Deburr any sharp edges 2b Drilling a porcelain sink It is best to use a special 1 diameter cutter designed for porcelain A carbide tipped masonry bit is a second choice Place a piece of tape over the area to be drilled to help prevent chipping Drill a pilot hole for the porcelain cutter Use the pilot drill supplied with the kit or a carbide ...

Page 9: ...CK 3 8 POLYTUBE TO DRAIN CLAMP BLACK 1 4 POLYTUBE TO DRAIN PORT ON RO SYSTEM BLUE 3 8 POLYTUBE PRODUCT OUTLET 6 Connect the tubing to the Faucet Push the Blue 3 8 Polytube into the 3 8 Quick Connect Fitting Push the Black 3 8 Polytube onto the large Hose Barb Push the Black Polytube onto the small Hose Barb 7 Determine which direction the handle should face right or left With the handle facing the...

Page 10: ... When you feel the Valve Handle firmly seated in the clockwise direction the copper tube is pierced and the valve is closed 2b To install on hard steel or brass tubing supply line The supply line should now be drained Use a battery powered or properly grounded drill to avoid shock hazard Drill a 3 16 hole in the supply line do not drill through the opposite wall Turn the handle to expose the lance...

Page 11: ...ld and insert the tubing Reference the special supplement sheet in the carton for proper connection of all tubing and removal of plugs Run the tubing along its course to the Feed Water Saddle Valve trim to length Refer to Fig 1 Refer to Fig 3 To the end of the red polytube install the Compression Nut the Plastic Ferrule and the Insert Connect to the Feed Water Saddle Valve 3 Locate the Black Drain...

Page 12: ...ly tighten the Housing hand tight only Remove the plugs labelled MEMBRANE and ACTIVATED CARBON from the underside of the manifold To each of the remaining white Housings add one capful of bleach Insert a Housing O ring engage and firmly tighten the Housings hand tight only Slowly open the Feed Water Saddle Valve turning counter clockwise As soon as the water begins to come out of the Dispensing Fa...

Page 13: ...n used daily After periods of non use such as a week of vacation it is better to empty the Holding Tank and allow the system to produce fresh water for use If the system is not used for 3 4 weeks or longer it is a good idea to resanitize the system and to change the prefilter and post filters B Changing Filters THIS R O SYSTEM CONTAINS FILTERS WHICH MUST BE REPLACED AT REGULAR INTERVALS TO MAINTAI...

Page 14: ...t time to change the In Line Activated Carbon Post Filter see Sec V C 1 6 Slowly open the Feed Water Saddle Valve When water begins dripping out of the Dispensing Faucet in the following order close the Faucet and then open the Holding Tank Valve Do not open the Faucet for at least 8 hours Discard the first three full tanks of water produced they will contain chlorine IN LINE ACTIVATED CARBON POST...

Page 15: ...15 NOTES ...

Page 16: ...ee check The ASO Valve is malfunctioning Replace ASO Valve components Low pressure at the Dispensing Faucet In Line Activated Carbon Post Filter is plugged Replace Post Filter Air precharge in the Holding Tank is too low Empty water from Holding Tank and with the faucet open adjust the air pressure to 5 7 psig 35 48 kPa range Check for leakage at the Air Valve Stem Holding Tank Valve is partially ...

Page 17: ...umbing Dissolved gasses in the Feed Water Pretreat Feed Water to remove dissolved gasses Increase in Product Water TDS See high TDS in the Product Water section Drain Water overflows at the Dispensing Faucet Air Gap is blocked Clear Air Gap Rinse with vinegar for removal of calcium buildup Drain tubing is clogged Clear tubing Drain Clamp hole is misaligned Align with hole in the drain pipe Excessi...

Page 18: ...18 MADE IN USA Exploded View Parts List 19 15 1 2 3 4 5 6 7 8 9 10 11 12 13 14 18 16 17 21 Nitrate Nitrite Test Kit 22 Water Quality Test Kit for systems without the Water Quality Monitor ...

Page 19: ...3010 Housing 15 R7078 Optional Water Quality Monitor w Probes and Cover 16 S2116 5 Drain Restrictor 50 GPD 189 lpd Green 17 S7125 Activated Carbon Post Filter 18 S1405 1 4 3 8 Fitting Wrench 19 S3072 Wrench for Housing 20 S7206W JG In Line Activated Carbon Post Filter shown on pg 6 R2118 Water Quality Monitor 25 Ft Extension Cable 21 S1447 Nitrate Nitrite Test Kit 22 S1580 Water Quality Test Kit O...

Page 20: ...so pay for shipping or travel charges to return the defective part s What Does This Warranty Not Cover This warranty does not cover the disposable sediment and carbon filters whose service life depends on feed water conditions In addition the membrane is only warranted if the required feed water conditions are met The above warranty will also not apply to any part of the Millennium R O Drinking Wa...

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