Village LW-160 User manual

THE LITTLE WONDER FRAME
LW-160 LW-200
USER GUIDE &
REFERENCE MANUAL
Village Marine Tec.
Fresh Water from the Sea
Corporate Sales Office/Manufacturer
2000 W. 135th St., Gardena, CA 90249
[phone] / [phone] Fax: [phone]
http: www.villagemarine.com
e-mail: [email protected]
FACTORY SHOWROOM AND SERVICE FACILITIES
SAN DIEGO, CALIFORNIA FT. LAUDERDALE, FLORIDA WEST PALM BEACH, FLORIDA
2820 Shelter Island Drive 802 S.E. 17TH Street Causeway 155 Blue Heron Blvd.
San Diego, CA 92106 Ft. Lauderdale, FL 33316 Riviera Beach, FL 33404
[phone] / [phone] [phone] / [phone] [phone] / [phone]
Fax: [phone] Fax: [phone] Fax: [phone]
SEATTLE, WASHINGTON PORTSMOUTH, VIRGINIA HONOLULU, HAWAII
1540 N.W. 46TH Street 100 Seventh Street, Suite 102 296 Mokauea Street, Suite 101
Seattle, WA 98107 Portsmouth, VA 23704 Honolulu, HI 96819
[phone] / [phone] [phone] / [phone] [phone] / [phone]
Fax: [phone] Fax: [phone] Fax: [phone]

TABLE OF CONTENTS
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1.0 INTRODUCTION 1
1.1 UNPACKING AND HANDLING 2
1.2 PERFORMANCE SPECIFICATIONS 2
1.3 ENVIROMENTAL REQUIREMENTS 2
1.4 CONSUMABLES 3
1.5 MAINTENANCE EQUIPMENT 3
2.0 TO INSTALL THE LITTLE WONDER FRAME 160 OR 200 4
2.1ALOCATION AND MOUNTING 4
2.1BTO CONNECT PLUMBING 4
2.1CTO CONNECT THE ELECTRICAL 7
3.0 GENERAL THEORY OF OPERATION 8
3.1 REVERSE OSMOSIS THEORY 8
3.2 APPLICATION OF REVERSE OSMOSIS 8
3.3 PRODUCT WATER QUALITY STANDARDS 9
3.4 FACTORS AFFECTING PERMEATE PRODUCTION 10
3.4ATEMPERATURE CORRECTION FACTOR 11
4.0 OPERATION 12
4.1ATO START THE LITTLE WONDER FRAME UNIT 12
4.1BTO SHUT DOWN THE UNIT 13
5.0 MAINTENANCE 14
FRESHWATER FLUSH / SHORT TERM STORAGE 14
5.1 TO FLUSH THE LITTLE WONDER FRAME UNIT 15
5.2 MEMBRANE CLEANING 15
5.3 CLEANING CHEMICALS 15
5.4 WHEN TO CLEAN 16
STEPS FOR CLEANING CHEMICALS #1, #2, AND #3 (CARTRIDGE FORM) 17

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5.5 OIL CHANGE PROCEDURE 18
6.0 MEMBRANE REPLACEMENT 20
6.1 PRESSURE VESSEL DISASSEMBLY 20
6.2 PRESSURE VESSEL ASSEMBLY 21
7.0 FREEZE PROTECTION 22
8.0 TROUBLESHOOTING 24
9.0 PLUMBING DIAGRAMS 25
10.0 PARTS REFERENCE 26
11.0 MANUFACTURER’S LITERATURE 27

SYSTEM START UP LOG
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Village Marine Tec.
Fresh Water from the Sea
SYSTEM START UP LOG
SYSTEM INFORMATION:
MODEL NUMBER:
SERIAL NUMBER:
DATE OF PURCHASE:
PURCHASED FROM:
INSTALLATION DATE:
START UP PERFORMANCE READINGS:
MEASURE AFTER 3 AND 24 HOURS OR PRESSURIZED TIME IN SIMILAR CONDITIONS
3 Hours 24 Hours
FEED WATER TEMPERATURE:
FEED WATER SALINITY (IF KNOWN):
BATTERY VOLTAGE:
VOLTAGE AT UNIT:
AVERAGE AMP DRAW (IF KNOWN):
OPERATING PRESSURE:
PRODUCT WATER FLOW: (GPH)(GPH)
REJECT WATER FLOW (IF KNOWN): (GPH)(GPH)
PRODUCT WATER QUALITY (IF KNOWN): (ppm)(ppm)

INTRODUCTION
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1.0 INTRODUCTION
SYSTEM DESCRIPTION
Village Marine Tec’s (VMT) Little Wonder watermakers are well-engineered reverse osmosis (RO) system, designed
and built for simple operations and maintenance for the cruising sailor, or sport fisherman, or where space is at a
premium. These 12/24 Volts DC desalination systems will produce seven to eight gallons per hour (GPH) of
freshwater from the sea (gallon production will vary based upon water temperature, salinity, and model of the RO
system).
The Little Wonder unit produces water, meeting or surpassing drinking water guidelines with seawater salt
concentrations as high as 32,000 parts per million (ppm).
HOW TO USE YOUR MANUAL
This User Guide & Reference Manual contains important information about the safe operation and maintenance of
your Little Wonder Vertical units.
We advise you to please read through the entire User Guide & Reference Manual carefully to ensure you familiarize
yourself with the operation of your RO system and follow the recommendations within the manual, to help make your
water producing experiences trouble-free and enjoyable.
SAFETY WARNINGS
Throughout this User Guide & Reference Manual you will see many important statements or labels indicated on the
product with the following words:
Indicates a strong possibility of severe personal injury or death if
warning instructions are ignored.
Indicates hazards or unsafe practices of product may cause
minor personal injury or may cause property damage.
NOTE:Text specifies useful information.

INTRODUCTION
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1.1 UNPACKING AND HANDLING
The Little Wonder reverse osmosis units are shipped pre-assembled. There are no special instructions
towards unpacking and handling of the watermaker system. Inspect the RO unit to verify it was not
damaged in transit. Also, please refer to the plumbing diagram to verify all components for the
watermaker are shipped prior to installation.
DO NOT EXPOSE THE RO UNIT TO FREEZING TEMPERATURES WITHOUT PROPER STEPS TO
TREAT THE RO UNIT FOR SUB-FREEZING TEMPERATURES.
1.2 PERFORMANCE SPECIFICATIONS
Parameter Specification
Raw water temperature (minimum) 33°F (1°C)
Raw water temperature (nominal) 77°F (25°C)
Raw water temperature (maximum) 113°F (45°C)
Min. raw water inlet pressure Flooded suction pressure
Max. raw water inlet pressure* 30 psi
Flush water recommended max. pressure* 35 psi
Design RO element pressure 800 psi
Max. RO element pressure 1000 psi
Max. feedwater chlorine residual < 0.1 ppm
Cleaning solution pH range 10-11 (chem. 1), 2-3 (chem. 2)
Membrane type Thin film composite
Table 1.0 -Performance Characteristics
*For inlet pressure greater than recommended limits, install pressure regulator.
NOTE:REGARDING WATER PRODUCTION:
The RO series number (i.e. LW160, LWM350, or LWV 200) refers to gallons per day (GPD) production
produced with new membranes at design optimum conditions.
To achieve optimum production:
(1) The feed flow must be unrestricted (positive water pressure at the inlet to high pressure pump).
(2) Seawater temperature at 77°F (25°C).
(3) Seawater salinity at 32,000 parts per million (ppm) total dissolved solids (TDS).
(4) Direct current (DC) units should be at charging voltage (13.8 volts for a 12 volt system) and wire
size should be 6 gauge.
Variation of conditions (environmental, temperature, and frequency of use) and normal aging of
membranes will decrease production. Normal membrane fouling will be partially recovered by chemical
cleaning, but 100% recovery should not be expected. Production rates from membrane to membrane
can vary +15%.
1.3 ENVIROMENTAL REQUIREMENTS
Parameter Specifications
List (Permanent):
Trim (Fore and Aft):
Pitch:
Roll:
15°
+ 30°
6108(6 sec cycle)
6308(12 sec cycle)
Table 1.1 -Nominal Operating Conditions

Village Marine Tec.
Freshwater From the Sea
Little Wonder Frame
Plumbing Diagram
2008

INTRODUCTION
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1.4 CONSUMABLES
Table 1.2 lists the consumables required for any six month operation of the RO unit. Use ONLY Village
Marine Tec. approved filters and chemicals.
LW 160/200/350
Description QTY VMT Part No.
Chemical Cleaning Cartridge Kit #1, #2 1ea/box 85-0102
Preservative Cartridge Kit, Chemical #3 2/box 85-0103
Filter, 5 micron, 10 sq-ft. 1ea 33-0117
Filter, Carbon, 10 sq-ft. 1ea 33-0311
Aqua Pro High Pressure Pump Oil 1 qt 85-0050
Table 1.2 –VMT Approved Consumables
1.5 MAINTENANCE EQUIPMENT
Table 1.3 lists the test equipment required for performance verification and maintenance of the RO unit.
DescriptionVMT Part No.
Kit, Pump, Service 70-6181
Economy Mini Water Tester, TDS 99-1990
Table 1.3 –Maintenance Equipment List

INSTALLATION
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2.0 TO INSTALL THE LITTLE WONDER FRAME 160 or 200
2.1a LOCATION AND MOUNTING
Village Marine Tec. recommends installing the RO unit in a dry sheltered location at or aft of midship,
with drainage underneath (to draw off standing water when performing routine maintenance or service).
Also, the RO unit should be installed BELOW waterline (Refer to Figure 2.1). Give consideration to
extra space around the RO unit, allowing access for the unit’s maintenance and removing the cover (i.e.
membrane replacement, oil change, prefilter replacement, or other services).
Figure 2.1: Recommended Installation Location -BELOW waterline.
Locate or create a ½” dedicated through-hull for the feedwater intake of the RO unit. The through-hull
must be attached with a ball valve (seacock), and optionally a sea strainer.
The Little Wonder FRAME SHOULD NOT SHARE a through-hull feedwater intake. Village Marine
Tec. recommends the Little Wonder HAVE its OWN dedicated through-hull, to properly feed
water into the RO. Avoid connecting the inlet piping to any water line which services an engine
or other equipment. Air could be drawn through the unit causing damage to the RO unit’s
pumps, as well as VOIDING the RO unit’s warranty with VMT.
Mount the unit using a minimum of four mounting holes through the frame base. Some holes are
provided, but you may prefer to dill new ones in more convenient spots for your installation. When
drilling, ALWAYS CHECK for the drill bit clearance to avoid puncturing/damaging any component of the
watermaker and the surrounding mounting area.
2.1b TO CONNECT PLUMBING
Refer to Section 9 for the EXPANDED detailed Little Wonder FRAME plumbing diagram.
Figure 2.2: Little Wonder FRAME Plumbing Diagram.

INSTALLATION
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Refer to Figure 2.3 for the Little Wonder FRAME manifold port identification.
Figure 2.3: Little Wonder FRAME Manifold –Left View.
FEEDWATER INTAKE
Mount the three-way manual Freshwater Flush Valve (attached to the Carbon Filter Housing) BELOW
waterline. Refer to Figure 2.4 for views of the Carbon Filter and Freshwater Flush Valve.
Figure 2.4: Carbon Filter with Freshwater Flush Valve –Isometric Views.
NOTE:Village Marine Tec. recommends the Manual Freshwater Flush Assembly be installed BELOW
waterline. However, the valve can be removed from the filter housing and relocated below
waterline, leaving the filter housing ABOVE waterline. A hose can be plumbed from the filter
housing to the valve. This way the seawater feed does not go above waterline which will avoid
trapping air or creating a priming problem. (See figure 2.5.)
Inlet from SeaCock
Outlet to LWF.
Fresh water
inlet.

INSTALLATION
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Figure 2.5: Connecting the Carbon Filter Outlet to the Separated Freshwater Flush Valve.
Using ½” diameter PVC hoses, connect all the feedwater components up to the main unit. Note the
boost pump outlet is a 3/8” barb fitting. Use a short section of 3/8” hose and then jump to ½” hose using
the step size adaptor provided.
BRINE DISCHARGE
Locate a convenient spot in the boat to install an overboard through-hull with an ½” diameter hole.
Discharge line is required to be ABOVE waterline (Refer to Figure 2.1). If connecting to a common
drain, tee in from above so that backflow contamination to the watermaker from other drains is not
possible.
PRODUCT WATER AND SAMPLE WATER
On both elbows off of the sample valve, connect a ¼” diameter PVC hose (or potable water hose), refer
to Figure 2.6. One hose is for product water sampling and the other hose is for feeding the ship’s
Freshwater Tank. The product tank hose off of the sample valve is to be fed into the top of the product
tank. Refer to Figure 2.1.
Figure 2.6: Little Wonder FRAME Sample Valve Connection.

INSTALLATION
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The product water hose line must go into the top of the product tank to prevent any possible back flow
when the watermaker is off. Teeing into the tank fill or tank vent line (if it is large enough to allow air out
while filling) is sometimes possible.
NOTE:Village Marine Tec. recommends running the sample line to a galley sink and installing a
dedicated water spigot, free flowing, always open (i.e. a ‘cane shaped’ fixture as used in a
manual galley pump). This allows easy sampling at a sink, a drain overboard and the capability
to fill extra water bottles, while your Little Wonder produces water for all purposes.
FRESHWATER FLUSH
Tap into your boat’s freshwater pressure system (Tee into the cold pressurized side) with a ½” diameter
hose to the carbon flush filter. If the freshwater pressure on board is above 35 psi, install a pressure
regulator.
2.1c TO CONNECT THE ELECTRICAL
TURN OFF ALL ELECTRICAL POWER FOR USE WITH THE RO UNIT PRIOR TO CONNECTING TO
THE RO POWER SOURCE. FAILURE TO DO SO MAY RESULT IN SERIOUS INJURY OR DEATH
TO PERSONS HANDLING THE UNIT.
NOTE:Adhere to all electrical codes and regulations governing the installation and wiring of electrical
equipment. Typical codes specify the type and size of conduit, wire diameter, and class or wire
insulation depending upon the amperage and environment.
NOTE: The power supply should always be of greater service rating than the requirements of the RO
unit. This will assure proper voltage even if power supply voltage is slightly less than required.
Never connect the RO unit to a line that services another electrical device. THE RO UNIT
SHOULD HAVE ITS OWN INDEPENDENT POWER SUPPLY.
Step 1:Verify all power switches and power sources are in the OFF position.
Step 2 Connect power source wire (Positive +) to line side on RO unit’s breaker.
Step 3:AC POWERED 110V/220V Little Wonder FRAME:
Connection will be from the separate control box to the vessel’s circuit breaker panel. VMT
recommends use of a 15 amp fuse or circuit breaker.
DC POWERED 12V/24V Little Wonder FRAME:
12 Volt DC units require 6 gauge wire. VMT recommends use of a 25 amp fuse or circuit breaker for the
12 VDC FRAME unit. Connect RO unit’s power supply wire (Positive +) from load side of unit’s breaker,
to power input on the Little Wonder FRAME’s terminal strip (Refer to Figure 2.7).
Step 4:Connect a negative wire from the ground bus bar behind main breaker panel to negative power source
input on unit.
Step 5:To connect the boost pump, connect positive red wire to switch (+) boost pump terminal and negative
black to negative power source terminal.
Figure 2.7: Little Wonder FRAME Electrical Interface Views.

GENERAL THEORY
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3.0 GENERAL THEORY OF OPERATION
3.1 REVERSE OSMOSIS THEORY
Reverse osmosis, like many other practical scientific methods, was developed from processes first
observed in nature. Osmosis is a naturally occurring phenomenon in which a semi-permeable
membrane separates a pure and a concentrated solution (a semi-permeable membrane is defined as
one that preferentially passes a particular substance). Every fluid has an inherent potential that is
directly related to the type and amount of solids in solution. This potential, referred to as osmotic
pressure, increases in proportion to relative concentration of a solution. A concentrated solution,
therefore, has an osmotic pressure that is higher than that of a pure solution.
In an osmotic system, the less concentrated solution will attempt to equalize the concentrations of both
solutions by migrating across the semi-permeable membrane. When enough pure solution migrates
across the membrane such that the inherent potential difference between the solutions in no longer
higher than the osmotic pressure of the membrane, the purer solution will stop flowing. If the pressure
on the concentrated solution is increased to above the osmotic pressure, fluid flow will be reversed. This
condition, called Reverse Osmosis, can be established by artificially pressurizing the more concentrated
solution using a high pressure pump. In this type of system, the concentrated solution (normally referred
to as feedwater) will become more concentrated as pure water flows out of solution and across the
membrane to the permeate side. Discounting the effects of feedwater temperature and salinity, the
operating pressure normally required to produce significant amounts of pure water is at least twice the
osmotic pressure of the membrane being used.
SALINE
SOLUTION
PURE
SOLUTION
SEMI
-
PERMEABLE MEMBRANE
ATMOSPHERIC
PRESSURE
(14.7 PSI)
SALINE
SOLUTION
PURE
SOLUTION
HIGH
PRESSURE
(800 PSI)
OSMOSIS
REVERSE OSMOSIS
Figure 3.1 -Simple (Reverse) Osmosis Process.
3.2 APPLICATION OF REVERSE OSMOSIS
Seawater contains many kinds of solids dissolved in solution. The most prevalent is common table salt
(sodium chloride). Other minerals that may be present in solution are substances that usually contain
various compounds of calcium and sulfate. The sum of all of the solids dissolved in a particular sample
of water is referred to as Total Dissolved Solids or TDS. Seawater normally averages 32,000 ppm
(parts per million) TDS although variations of 5000 ppm are common in various parts of the world. The
fundamental goal of any desalination process is a significant reduction in the amount of dissolved solids
in water.
In a Reverse Osmosis desalination system, most of the dissolved solids do not pass through the
membrane but are instead carried along the membrane surface. This rejected water, referred to as
brine, becomes increasingly more concentrated as it flows across the surface of the membranes and is
eventually piped to drain. The product water that flows through the membrane is referred to as
permeate. The percentage of feedwater that enters the unit converted to permeate is called the
recovery rate. A higher than optimal recovery rate (which can be obtained by increasing the back

GENERAL THEORY
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pressure on the unit above the recommended range) results in greatly increased membrane fouling
rates and a significant decrease in the operational life of the membranes.
It should be noted that no system is capable of removing all 100% of the dissolved solids from
seawater. Designed to reject approximately 99% of the TDS, the system allows 1% of the 32,000 ppm
TDS in the seawater to pass into the product water. This yields product water of less than 500 ppm, the
recommended TDS for drinking water. A system such as this is said to have a salt passage of 1%.
Figure 3.: Simplified Schematic of an RO System.
3.3 PRODUCT WATER QUALITY STANDARDS
This RO unit will produce permeate (product water) with a quality of less than 500 ppm TDS and in
accordance with World Health Organization (WHO) guidelines for drinking water. General WHO
specifications for acceptable drinking water quality are as follows:
Table 3.0 -WHO Drinking Water Guidelines.
Constituent Ion / Molecule Maximum Limits (ppm)
Nitrate 10
Fluorine 1
Chlorine 250 (per USPHS 1962)
Sulfate 100
Magnesium 30
Calcium 75
Calcium Carbonate 100
Iron 0.1
Manganese 0.05
Total Dissolved Solids 500
Turbidity 5
Oil 0.1
Detergents (Anionic) 0.2
Phenols 0.001
Bacteria –E. Coli (per 100 ml) 0

GENERAL THEORY
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3.4 FACTORS AFFECTING PERMEATE PRODUCTION
VARIATIONS IN TEMPERATURE, PRESSURE, AND SALINITY
The following table illustrates how the quality and quantity of permeate produced by a RO system is
affected by changes in temperature, salinity and pressure:
Permeate
With constant.... And increasing.... TDS Capacity
Salinity and Pressure Temperature Increases Increases
Temperature and Pressure Salinity Increases Decreases
Temperature and Salinity Pressure Decreases Increases
Table 3.1 -Factors Affecting Permeate Quality
The RO system can be adjusted to maintain a constant permeate output when feedwater temperature
and salinity is other than nominal. The operator can do this by controlling system pressure manually via
the backpressure regulation valve located in the system brine piping. As permeate flow decreases, the
operator can throttle the pressure regulation valve closed to increase system pressure. This, in turn,
will increase the permeate output and mitigate the effect of a decrease in temperature or an increase in
salinity. Conversely, the operator can open the pressure regulation valve to reduce pressure and
permeate flow in areas of excessively high temperature or low salinity.
IN FRESH OR BRACKISH FEEDWATER CONDITIONS, MAKE SURE TO REDUCE PRESSURE BY
TURNING REGULATOR. SET PRESSURE SO PRODUCT FLOW IS NO MORE THAN 120% OF
DESIGN FLOW TO AVOID MEMBRANE DAMAGE.

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3.4a TEMPERATURE CORRECTION FACTOR
As previously described, the output capacity of any RO unit is highly dependent on feedwater
temperature. In order to quantify this relationship, operational data has been utilized to develop
Temperature Correction Factors (TCF). The TCF (which is compensated to 25°C/77°F) is used to
determine what part of any change in system output flow is due to variations in feedwater temperature
alone. This, in turn, allows the operator to establish the baseline flow for a given temperature, allowing
more accurate troubleshooting. The procedure for calculating the TCF and the temperature
compensated flow is as follows:
1) Measure sea water temperature.
2) Determine the corresponding correction factor from Table 3.2 based on the measured temperature.
3) Note the product flow rate at the Product Flow meter.
4) Multiply the measure (uncorrected) product flow meter flow rate by the correction factor from Table
3.2 to give the calculated system output under standard conditions (25°C).
Example:
Raw water temp: 15°C
TCF: 1.47
Actual product flow: 5.67 (gph)
Calculation: 5.67 x 1.47 = 8.3349 (gph)
Calculated product flow: 8.3 (gph)
(Adjusted to 75°)(This is the normal flow for a LW 200)
°C
Factor °C Factor °F Factor °F Factor
13.64 26 0.97 34 3.47 84 0.88
23.23 26 0.94 36 3.18 86 0.82
33.03 28 0.91 38 3.18 88 0.79
42.78 29 0.88 40 2.68 90 0.79
52.58 30 0.85 42 2.47 92 0.77
62.38 31 0.83 44 2.29 94 0.75
72.22 32 0.80 46 2.14 96 0.73
82.11 33 0.77 48 2.01 98 0.70
92.00 34 0.75 50 1.88 100 0.68
10 1.89 35 0.73 52 1.77 102 0.65
11 1.78 36 0.71 54 1.68 104 0.63
12 1.68 37 0.69 56 1.59 106 0.61
13 1.61 38 0.67 58 1.51 108 0.59
14 1.54 39 0.65 60 1.44 110 0.57
15 1.47 40 0.63 62 1.36 112 0.55
16 1.39 41 0.61 64 1.30 114 0.53
17 1.34 42 0.60 66 1.24 116 0.51
18 1.29 43 0.58 68 1.17 118 0.49
19 1.24 44 0.56 70 1.12 120 0.47
20 1.19 45 0.54 72 1.08 122 0.45
21 1.15 46 0.53 74 1.05
22 1.11 47 0.51 76 1.02
23 1.08 48 0.49 78 1.00
24 1.04 49 0.47 80 0.93
25 1.00 50 0.46 82 0.90
Table 3.2 -Temperature Correction Factors

OPERATION
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4.0 OPERATION
4.1a TO START THE LITTLE WONDER FRAME UNIT
Figure 4.1: Little Wonder FRAME Instrument Details.
Step 1:Turn the sample valve to SAMPLE position to direct the flow of water to the sample line.
Step 2:Turn High Pressure Bypass Valve (Black Valve) to CLEANING POSITION, counter-clockwise. This will
help prime the system by releasing air. Verify the Cleaning Valve is positioned to NORMAL discharge.
Also check the gray Freshwater Flush Valve (Refer to Figure 2.4) is positioned for seawater intake,
NOT freshwater.
FAILURE TO OPEN THE HIGH PRESSURE BYPASS VALVE, WHICH IS REQUIRED TO RELEASE
ANY TRAPPED AIR, COULD RESULT IN HYDRAULIC SHOCK TO THE SYSTEM.
Step 3:Verify the seawater intake is open at the through-hull. This allows the feed seawater to flow into the unit.
Start-up time can be expedited by temporarily turning the flush valve to freshwater position to fill the
filter housing and prime the system before the RO unit is turned on.
Step 4:Switch ON the breaker at main breaker panel to power up unit.
Step 5:Flip power switch ON located on unit’s front face panel, to start the pumps. (Refer to Figure 4.1). On AC
powered units, a separate switchbox allows the boost pump to be started before the HP pump.
Step 6:Upon initial start-up inspect all plumbing connections in the unit for leakage. Varying temperatures
during shipment may cause plumbing connections to seep when starting the RO unit for the first time.
Secure the unit and repair any leaks before proceeding. Once the leaks are repaired, open the raw
water source and restart the unit.
Step 7:Gradually turn the High Pressure Bypass Valve (Black Valve) to NORMAL/RO position. The pressure
gauge should rise steadily to a reading of 800 psi.
Step 8:Observe the system pressure on the High Pressure Gauge. During RO production, the indicated
pressure should be at 800 psi. If the pressure reading is not at 800 psi, adjust the nut on top of the
pressure regulator valve using a wrench until the reading reaches 800 psi.
Step 9:With the Sample Valve at SAMPLE position, taste the water quality or test it with a hand-held test
meter.If quality is good, turn the Sample Valve over to the vessel’s storage tank.
NOTE:If the RO unit is used for other than seawater purification (in freshwater or brackish water
applications), reduce pressure as necessary to achieve product flow no greater than 120% of
design flow to avoid membrane damage.