Millennium MRO-35 Installation, Operation And Service Manual
Millennium
Reverse Osmosis Drinking Water System
Model MRO-35
INSTALLATION, OPERATION & SERVICE MANUAL
Tested and Certied by NSF International against
NSF/ANSI Standard 58 for the reduction of the
claims specied on the Performance Data Sheet.
TABLE OF CONTENTS
Page
SECTION I. INTRODUCTION ...................................................................................3
SECTION II. SPECIFICATIONS ................................................................................4
SECTION III. PREPARATION .....................................................................................5
A. Major System Components .............................................................5
B. Tools Recommended for Installation ...............................................7
C. Site Selection For Major System Components ...............................7
SECTION IV. INSTALLATION STEPS ........................................................................8
A. Faucet with Water Quality Monitor Installation ................................8
B. Feed Water Saddle Valve Installation ...........................................10
C. Drain Clamp Installation ................................................................10
D. R.O. Manifold Assembly Installation .............................................11
E. Position the Drinking Water Holding Tank
and Make the Final Hose Connections .........................................12
F. Start Up .........................................................................................12
SECTION V. OPERATION AND MAINTENANCE ...................................................13
A. Normal Operation ..........................................................................13
B. Changing Filters ............................................................................13
C. Changing the In-Line Activated Carbon Post Filter .......................14
SECTION VI. TROUBLE SHOOTING GUIDE ...........................................................16
EXPLODED VIEW AND PARTS LIST ..................................................................................18
CAUTION:
The Centers for Disease Control and Prevention (CDC) and the Environmental Protection Agency (EPA) have issued guidance
to people with severely weakened immune systems who may want to take extra precautions to reduce the risk of infection with
Cryptosporidium from drinking water. This guidance pertains 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
immunodeciencies.
The EPA has stated that they do not know the signicance of drinking water compared to other possible sources of Cryptosporidium to
determine how most people become infected. The CDC-EPA guidance suggests that immunosuppressed individuals discuss their risks
with their health care provider.
This drinking water system is tested and Certied by NSF International to NSF/ANSI Standard 58 for cyst reduction. It meets
the NSF/ANSI standard of reducing at least 99.95%* of cysts (including Cryptosporidium), however, because this is not 100%,
immunosuppressed individuals should take the extra precaution of boiling their drinking water. According to the CDC-EPA, bringing
water to a rolling boil for one minute is the most certain approach for killing Cryptosporidium.
All individuals should take adequate precautions when changing the lter cartridges, including wearing protective gloves, to avoid direct
contact with the exhausted cartridges.
*For complete specications, refer to the Performance Data Sheet.
SECTION I. INTRODUCTION
Your new Reverse Osmosis (R.O.) Drinking Water
System uses a combination of ltration 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 Prelter has
been designed to reduce the larger particles
such as silt, rust and scale. Its 5 micron
(equal to 0.0002 inch) nominal rating
to give maximum life to the R.O. Membrane.
helps
The activated carbon in the Prelter 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 ltration 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 lm, and is classied 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 nal
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 inuent concentrations of no more than 27 mg/L nitrate and 3 mg/L nitrite
in combination measured as N and is certied 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 certied for cyst reduction may be used on disinfected water that may contain lterable cysts.
3
SECTION II. SPECIFICATIONS
TABLE A – QUALIFIED SYSTEM PERFORMANCE
Because the performance of an R.O. Membrane is highly dependent upon pressure, temperature and TDS, the
following should be used for comparison purposes only.
U.S. Metric
Membrane Production1 41-53 gpd 155–201 lpd
Membrane TDS Reduction1 96% minimum 96% minimum
System Production² 14 gpd 53 lpd
Recovery Rating
Efciency Rating
2
2
38% 38%
22% 22%
TDS Reduction² 90%+ typical 90%+ typical
Drain (reject water) Flow 3–5 x product ow 3–5 x product ow
Empty Storage Tank Precharge 5–7 psig air 35–48 kPa air
Storage Tank Capacity
1
Industry standards measure R.O. Membranes performance with no backpressure on the product water, at 65 psig (448kPa) and 77°F
(25°C). Further conditions on the above are 250 ppm TDS. Production rate and TDS reduction gures are for a new Membrane that
has been rinsed for 24 hours. The production rate of a new Membrane can decrease by 10% per year or more, depending upon the
scaling and fouling tendencies of the Feed Water.
2
Measured at 50 psig, 77°±2° F, 750±40 mg/l TDS per section 6 of NSF/ANSI Standard 58. Recovery rating means the percentage
of the inuent water to the membrane portion of the system 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. Efciency rating means the percentage
of the inuent 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 replaceable component critical to the efciency of
the system. Replacement of the reverse osmosis component should be with one of identical specications, as dened by the
manufacturer, to assure the same efciency and contaminant reduction performance.
2
1.8 gallons 6.8 liters
TABLE B – RECOMMENDED OPERATING LIMITS FOR FEED WATER
Specications T.F.C. Membrane
Water Pressure 40–100 psig (280–690 kPa)
TDS 2000 ppm (also mg/l) max.
Temperature 40–100°F (4–38°C)
pH 4–11 (optimum rejection at pH 7.0 - 7.5)
Hardness Less than 10 gpg (170 mg/l) or soften
Iron Less than 0.1 ppm (also mg/l)
Manganese Less than 0.05 ppm (also mg/l)
Hydrogen Sulde None
Chlorine See note
Bacteria Must be potable**
NOTE: Chlorine will damage a T.F.C. Membrane. The Activated Carbon Prelter has been designed to reduce chlorine from the
incoming water. Change lter every 6 to 12 months, more often if the water contains more than 1 ppm chlorine.
**DO NOT USE WITH WATER THAT IS MICROBIOLOGICALLY UNSAFE OR OF UNKNOWN QUALITY, WITHOUT ADEQUATE
DISINFECTION BEFORE OR AFTER THE SYSTEM.
4
SECTION III. PREPARATION
RED
BLACK
YELLOW
IN
DRAIN
OUT
DRAIN
RESTRICTOR
A. Major System Components
The following components comprise the R.O.
Drinking Water System. (Refer to Fig. 1, below
for general system layout.)
• An R.O. Manifold assembly.
• Housings and Housing O–rings.
• A Drinking Water Holding Tank.
• A Dispensing Faucet
• A Feed Water Saddle Valve.
• A Drain Clamp.
• Plastic Tubing and tube connectors.
• A Reverse Osmosis Membrane sealed in a
plastic bag.
• A Sediment/Carbon Prelter, shrink wrapped.
TYPICAL MRO-35 UNDER SINk INSTALLATION DIAGRAM
Close-up of Manifold
• An Activated Carbon Post Filter, shrink
wrapped.
• Water Quality Monitor*
• Water Quality Test Kit for systems without the
Water Quality Monitor.
• An In–Line Activated Carbon Post Filter,
shrink wrapped.
• Other items necessary for installation may
include wood screws or machine 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.
* 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
1
2
WATER QUALITY MONITOR
FAUCET BASE (OPTIONAL)
See Page 11
HOLDING TANK
SHUTOFF VALVE
(Open Position)
10
3
DRAIN
DRAIN
(3/8" Black)
WATER QUALITY MONITOR CABLE (OPTIONAL)
IN-LINE ACTIVATED
6
CARBON POST FILTER
COVER
4
PRODUCT
(3/8" Blue)
5
RO MANIFOLD
CLAMP
DRAIN
(1/4" Black)
INLET
(1/4" Red)
8
9
DRINKING
WATER
FEED WATER
SADDLE VALVE
(Cold Water Line Only)
LOCATE DRAIN CLAMP
ABOVE "P" TRAP
HOLDING TANK
TANK
(3/8" Yellow)
Figure 1
5
(1/4" Yellow)
7
POLYTUBE
TEE
4" MIN
ACTIVATED
CARBON
POST FILTER
HOUSING
REVERSE
OSMOSIS
MEMBRANE
HOUSING
SEDIMENT/
CARBON
PREFILTER
HOUSING
FLOOR
RED
BLACK
YELLOW
IN
DRAIN
OUT
DRAIN
RESTRICTOR
OPTIONAL MRO-35 BASEMENT INSTALLATION DIAGRAM
DISPENSING
FAUCET
WATER QUALITY
MONITOR FAUCET
BASE (OPTIONAL)
NOTE: FOR REFRIGERATOR
PRODUCT
(3/8” Blue)
WATER QUALITY
MONITOR CABLE
(OPTIONAL)
25 FT. EXTENSION CABLE
FOR THE WATER QUALITY
(OPTIONAL)
WATER DISPENSER OR
ICE MAKER HOOKUP, TEE
INTO 3/8" BLUE TUBING TO
DISPENSING FAUCET.
HOLDING TANK
SHUTOFF VALVE
(Open Position)
Close-up of Manifold
See Page 11
POLYTUBE
TEE
IN-LINE
ACTIVATED
CARBON
POST FILTER
FEED WATER
SADDLE VALVE
(COLD WATER
LINE ONLY)
1” AIR GAP
REQUIRED
INLET
(1/4” Red)
(1/4" Yellow)
DRAIN
(1/4” Black)
ACTIVATED
CARBON
POST FILTER
HOUSING
COVER
TANK
(3/8” Yellow)
REVERSE
OSMOSIS
MEMBRANE
HOUSING
RO
MANIFOLD
SEDIMENT
CARBON
PREFILTER
HOUSING
DRINKING
WATER
HOLDING
TANK
MOUNT HOLDING
TANK ON SHELF OR
STRAP BETWEEN
FLOOR JOISTS
(shelf or straps not
included)
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.
BASEMENT
FLOOR
6
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