Pentair EZ-RO 200/2G-BL Original operating instructions

EZ-RO SYSTEMS
INSTALLATION & OPERATION GUIDE
For Reverse Osmosis Systems
with Blending & Hydropneumatic Tanks
foodservice.pentair.com

2 | PENTAIR EZ-RO INSTALLATION AND OPERATION GUIDE FOODSERVICE.PENTAIR.COM
SAFETY INSTRUCTIONS
NOTES
• The appliance is only to be installed in locations
where its use and maintenance are restricted to
trained personnel.
• Children should be supervised to ensure that they do
not play with the appliance.
• Cleaning and user maintenance shall not be made by
children without supervision.
• The appliance is not suitable for installation in an area
where a water jet could be used.
• Substances listed as reduced are not necessarily in
your water. System must be maintained according to
manufacturer’s instructions, including replacement of
lter cartridges.
• Your water must be within required inuent water
characteristic limits for satisfactory operation. If not,
the reverse osmosis (RO) membrane cartridge’s life
may be shortened and your warranty will be voided
(see Installation Requirements).
• Install on cold water line only.
• Do not install where system will be exposed to direct
sunlight.
• Make certain that installation complies with all state
and local laws and regulations. Only use PTFE thread
seal tape or plumbers tape without adhesive backing
to seal joints. Do not use pipe compound (“pipe dope”),
sticks, or similar compounds with this unit; they
contain petroleum derivatives which can cause crazing
and cracking of the plastic in the lter housing.
WARNINGS
• Installation shall comply with applicable local, state,
and national plumbing and electrical regulations.
• The appliance is intended to be permanently
connected to the water mains and not connected by
a hose-set.
• Before installing the system, make certain your
water supply complies with the following operating
specications. Failure to do so may reduce the
effectiveness of the system and will void the warranty.
Consult your local water treatment utility or a
certied water testing lab to determine the quality of
your water.
• Do not use with water that is microbiologically unsafe
or of unknown quality without adequate disinfection
before or after the system. The Pentair EZ-RO System
will not protect against disease-causing bacteria or
remove naturally occurring harmless bacteria.
• The EZ-RO System contains replaceable components
that are critical to the eciency of the system.
Replacement of the reverse osmosis component
should be with one of identical specications, as
dened by the manufacturer, to assure the same
eciency and contaminant reduction performance.
• The EZ-RO System has lter cartridges and an RO
membrane cartridge included with the system that
have limited service lives which are critical for the
effective reduction of total dissolved solids. Product
water should be tested periodically to verify that the
system is working properly.
CAUTIONS
• The EZ-RO System must be protected against
freezing which can cause the lter housing to crack,
resulting in water leakage.
• Do not use electrical heating tape or a propane torch
on this unit.

PENTAIR EZ-RO INSTALLATION AND OPERATION GUIDE FOODSERVICE.PENTAIR.COM | 3
EZ-RO REVERSE OSMOSIS SYSTEM
INSTALLATION AND OPERATION GUIDE FOR MODEL NUMBERS:
EZ-RO 200/2G-BL
EZ-RO 200/5G-BL
EZ-RO 200/10G-BL
EZ-RO 200/16G-BL
EZ-RO 375/2G-BL
EZ-RO 375/5G-BL
EZ-RO 375/10G-BL
EZ-RO 375/16G-BL
INDEX
Safety Instructions..............................................................2
Introduction........................................................................3
General Information ............................................................4
Unpacking and Inspection ..................................................4
Part Names .........................................................................5
Installation Requirements...................................................6
Items Required for Installation ............................................7
Using Push-to-Connect Fittings.......................................... 7
Wall-Mount Installation .......................................................8
Optional Floor Stand Mount Installation...............................8
Connect Tubing...................................................................9
Reject Flow Restrictor Chart............................................. 10
System Startup and Flushing Process................................ 11
Prelter and Mineral Addition Flush and Tank Fill ............... 11
Twenty-four Hour Flush and Soak.......................................13
System Dump and Fill, Connect to Equipment................... 14
Adjust Blend Valve..............................................................15
Filter Change and Flushing Procedure................................16
TDS Monitor .......................................................................19
Troubleshooting................................................................20
Replacement Parts ...........................................................22
Dimensions .......................................................................23
Plumbing Flow ..................................................................24
NSF Product Certication Information..............................24
Warranty Information ........................................................24
INTRODUCTION
Leveraging proprietary technology, the Pentair® Everpure® EZ-RO system provides high quality water for applications, such
as premium espresso, coffee, ice, and blended beverages. The system combines multiple water treatment technologies,
providing superior protection against taste and odor-causing contaminants. The system meets espresso, coffee, ice, and
tea equipment and customer water quality standards, known to signicantly reduce scale and corrosion problems due
to high TDS, water hardness†, and chlorides* while reducing dirt†, particulates†and dissolved solids that may foul or scale
equipment or may contribute to corrosion.
*When installed, serviced and maintained according to Pentair Everpure installation and operation instructions.
† These contaminants are not performance tested or certied by NSF®.
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
A A
B B
C C
D D
68.00"
24.00"
24.00"
30.00"
47"
MODULAR RO -
DISPLAY SIZE ESTIMATE
HYDRO PNEUMATIC SYSTEM
68" TALL AREA x 24" WIDE x 30 DEEP TO WALL
16 GALLON TANK SHOWN
ALTERNATE TANKS DISPLAY OPTIONAL
15.4
20.3
23.2
30.4
13.9
17.9
15.3
15.3
12.3
11.00
DETAIL A
SCALE 1 / 2
A
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
A A
B B
C C
D D
24.3
22.8
14.1
8.0
18.0
20.5
16.6
17.4
8.0
ATM SYSTEM
WITH #7 CANS
HYDRO PNEUMATIC TANK
AND SMALL ATM TANK
SYSTEM SIZE
Wall-mounted EZ-RO processor EZ-RO on (optional) oor stand Hydropneumatic tank sizes, depending on model purchased:
2 gal, 5 gal, 10 gal, 16 gal

4 | PENTAIR EZ-RO INSTALLATION AND OPERATION GUIDE FOODSERVICE.PENTAIR.COM
GENERAL INFORMATION
EZ-RO for Hardness Minerals and Undesirable TDS
Unltered water can degrade equipment and affect product taste, which hits food service business owners two
ways—operational costs and prot loss. Like most reverse osmosis systems, EZ-RO reduces contaminants before
they enter the equipment and the end user experience.
EZ-RO reduces high TDS (Total Dissolved Solids) on a molecular level. It then adds back calcium and magnesium
from the mineral addition cartridge and allows you to blend back additional TDS to your specic requirements
with the built in TDS meter, making it ideal for ice machines, coffee and espresso brewing equipment. It achieves
next level quality water through its ease of use from install through on-going maintenance, water eciency, and
expandability.
Quality System for Quality Water
EZ-RO features a compact body with a built-in bypass and ush valves, so you cut down on steps during install and
servicing. From there, we ensure seamless performance. The reimagined RO solution lters contaminants—all
while adding back the minerals you want. This tailored blending process moderates the right amount of dissolved
minerals to achieve your desired nal water quality.
Easy – With more accessible parts and no extra SKUs, this all-inclusive system makes specication, installation,
and maintenance easier. It’s universal, so contractors know what they’re dealing with after one encounter.
Expandable – Our system grows with the business by design. The system is compact, yet customizable to expand
no matter how it’s installed—wall mounted, free standing or under the counter. Upgrade lters or tanks as
operational needs increase, as available.
Ecient – The small footprint optimizes space. The remineralization technology safeguards the investment to
avoid premature replacements as the high output membrane recovers up to 50% water.
UNPACKING AND INSPECTION
Inspect the carton for damage. Carefully unpack and inspect each item. Report any damage to freight carrier
immediately and retain all packaging materials.
The Pentair EZ-RO system includes all the necessary ttings for installation except for an air gap for the waste
water. Lengths of 1/4", 3/8", and 1/2" tubing have been provided.
The Pentair EZ-RO system is packaged as a complete unit in two cartons. You should have the following:
Parts Quantity
Box 1 1. EZ-RO Processor with Plug 1
2. Pre Filter Cartridge 1
3. 4CM Mineral Addition Cartridge 1
4. EZ-RO Membrane: Size 200 or 375 1
5. Installation Kit,Tubing 1
6. Installation and Operation Guide (not shown) 1
Box 2 A. HP Tank Assembly: 2, 5, 10, or 16 Gal 1
Box 3 Optional Floor Stand (if ordered) (See page 22.) 1
Before mounting the EZ-RO System, inspect the parts. Use the table and illustration provided to verify the parts
and quantities. If you do not have these components, do not attempt to install this system. Contact Everpure
for assistance. If any parts are missing, contact Customer Service at 800.942.1153 / 630.307.3000 or by email at
[e-mail].
1
2
5
A
3
4
One of the above

PENTAIR EZ-RO INSTALLATION AND OPERATION GUIDE FOODSERVICE.PENTAIR.COM | 5
PART NAMES
Cover
Blend Valve
RO Inlet
Pressure Dial Reject Flush Valve
Floor Stand (optional)
Outlet Valve
Inlet Valve
Permeate
Sample Port Valve
Optimized water TDS:
Measures the TDS of the
water from the mineral feed
cartridge and blend valve.
On/off button for
TDS monitor
Prelter
Tank
Tank Valve
Mineral Addition
Membrane Filter
Tank Tube
1/2" blue tube
connects to tank
Feed Water IN
3/8" green tube
1/2"MPT x 3/8" PTC (Push-to-Connect)
connection included to attach to inlet
water supply valve
Reject Water OUT
1/4"black tube
Tank sizes by water volume in gallons:
2 gal, 5 gal, 10 gal, 16 gal
(Currently shown is 5 gal)
10 psi precharge is standard.
TankTank
SamplingSampling
ValveValve
Total dissolved solids (TDS)
measured by parts per million.
Outlet Tube
Optimized Water OUT
to equipment
1/2" blue tube
1/2"MPT x 1/2" PTC 1/2"
connection included
to attach to outlet
water supply

6 | PENTAIR EZ-RO INSTALLATION AND OPERATION GUIDE FOODSERVICE.PENTAIR.COM
INSTALLATION REQUIREMENTS
This product is for commercial use only and must be installed and maintained in accordance with manufacturer’s
guidelines and local regulatory plumbing and electrical codes.
LOCATION
The system should be installed indoors and close to:
•RO processor: The hydropneumatic (HP) tank can be
no further than 10 feet from the RO processor due
to the tubing connections.
•Water source
•Drain (within ve feet of unit)
•Equipment served (within 25 feet of unit)
Do not let the processor or storage tank freeze or be
exposed to rain or direct sunlight.
WATER REQUIREMENTS
Feed Water
Adequate ow and pressure of water to the unit is
essential.
Water supply should be:
•Cold water only
•Minimum 50 psi dynamic pressure, maximum 100
psi static pressure
• Supplied by a dedicated 1/2" water line to the installation
Install a full-ow ball valve and pressure gauge with 1/2"
female pipe thread (user supplied) for connection to
installation hardware provided with the system.
Feed-water chemistry
Operating a system on water supplies outside of these
parameters may lead to premature membrane failure.
Feed TDS Up to 1000 ppm
Feed pH 5 - 10
Hardness <12 grains
Free chlorine <3.0 mg/l
Turbidity <1.0 NTU
Iron (Fe) <0.1 mg/l
Manganese <0.05 mg/l
Hydrogen sulde 0.0 mg/l
Silica <20 mg/l
A water analysis must be conducted before installing
the system, or the required information can be obtained
from your local water utility. If your water analysis
shows that any of these parameters are not within
range, additional pretreatment and/or higher frequency
of maintenance may be necessary. Contact your
Everpure distributor for assistance.
The membrane can be fouled by:
•Silica
•Flocculants such as alum or cationic polymers
•Hardness, iron, manganese and hydrogen sulde
The presence of silica or occulants in the feed water may
require special chemical pretreatment or more frequent
membrane replacing. Please note that membrane failure
due to fouling is not covered by the warranty.
DRAIN
The drain should:
•Be located within ve feet of the unit
•Have a locally compliant air gap
The drain must:
•Allow a minimum ow of two gallons per minute
•Be accessible for system set-up and service
STORAGE TANK
The tank must be located 10 feet or less from the water
processor unit. The oor beneath the storage tank
should be smooth, clean and free of sharp objects that
could scratch or puncture the bottom of the tank.
OPTIMIZED WATER LINES TO EQUIPMENT
Tubing, piping and associated ttings connecting
optimized water lines to equipment should be food
grade material that meets NSF Standards 51 or 61 with
a minimum pressure rating of 100 psi.
Optimized water may react with most metal piping
imparting a bad taste. Plastic pipe or reinforced opaque
beverage tubing are acceptable choices for optimized
water distribution. A 1/2" or larger inside diameter
tubing or hose will minimize pressure drop.
INSTALL

PENTAIR EZ-RO INSTALLATION AND OPERATION GUIDE FOODSERVICE.PENTAIR.COM | 7
ITEMS REQUIRED FOR INSTALLATION
In most cases, common hand tools and plumbing materials suitable for use with potable water are all that is
needed for system installation. The system setup and calibration requires special equipment:
•Two - 32 ounce or 1,000 ml graduated containers
•Stopwatch
•Air pressure gauge
•Bicycle tire pump with Schrader valve
•TDS meter
•Tube cutter
•Pencil or pen
•5.25% household bleach or equivalent disinfectant
•Full ow ball valve with 1/2" female NPT thread
•Phillips head screwdriver
•PTFE tape
•Adjustable wrench
•Cable ties
•Air gap accessory (optional)
•1/4" tubing clamps (included)
•Food grade (NSF) plumbers grease,
•5 gallon bucket (recommended for ushing)
•Four wall anchors to support processor adequately
for the installation area walls (included for drywall
with wood studs)
OR clean surface on which to place the processor in
(optional) stand
NOTE: Consult with your local building inspector for approval and required permits to install this system.
Additional equipment may be required. Installation must meet all local and national codes.
Fitting Overview
Collet/Gripper (dark gray)
Tubing Preparation
The tubing outside must be free of
nicks or gouges.
Cut tubing with a proper tube cutter
for a clean, round cut.
After cutting, make sure the
end of the tube is round. Fix if
needed.
Mark on the tube the depth that it
should go in. This will help you see
when the tube is fully inserted.
Size and color
of tube
Insertion
depth to mark
1/4"black 1/2" to 5/8"
3/8" green 3/4" to 7/8"
1/2" blue 1" to 1-1/8"
To Remove Tubing
Press collet in to release the
grippers while pulling out the tubing.
To Attach Tubing
To lubricate, moisten end of tubing
with fresh water.
Push tubing straight in.
You will feel resistance when the
tubing meets the O-ring.
Keep pushing past the resistance
until the tubing rests against the
stop. Check the mark that you made
on the tube to make sure the tube is
inserted far enough.
USING PUSH-TO-CONNECT FITTINGS
Get to know how to use the tubing connections before going forward.
O-ringO-ring StopStop
INSTALL

8 | PENTAIR EZ-RO INSTALLATION AND OPERATION GUIDE FOODSERVICE.PENTAIR.COM
WALL-MOUNT INSTALLATION
Locate system near equipment, drain, and water source.
• Do not block access to controls and lters.
• Leave at least 3" clearance below the cartridges
for removal.
• Mount processor where it is well-supported.
• Using appropriate wall anchors or screws, fasten
anchors into concrete or screw directly into studs
beneath wall board. If using concrete fasteners,
follow manufacturer's instructions.
NOTE: If mounting on drywall, locate studs. Make sure that
at least two of the anchors will be fastened into a stud.
1. Remove RO processor top cover by loosening
Phillips screw in the back. Using a level, draw a line
where the top or bottom of the bracket will be. Hold
the RO processor on the line in the position it will be
mounted and mark the four holes on the bracket.
2. Secure RO processor to wall using appropriate wall
anchors. Put in screws with enough clearance to
install the bracket.
3. How to use the supplied drywall/stud anchors:
a.Using #2 Phillips screwdriver, press drywall/stud
anchor tip slightly into drywall. Applying pressure,
turn anchor. If wood stud is hit, increase pressure.
Continue turning anchor until ush.
b. Insert screw into anchor and mostly screw it in.
4. Hook processor over all
four screws.
5. Slide processor to one
side and tighten screws.
• You can leave cover
off until nal ushing.
INSTALL
OPTIONAL FLOOR STAND MOUNT INSTALLATION
Locate system in a secure location that’s near
equipment, drain, and water source.
The oor stand kit part number is: EV315968.
• Do not block access to controls and lters.
1. Note the screw slots and tabs on the oor stand.
• On 200 and 375 models (size 4 cans: 14.5 inches
long) use the lower tabs and screw slots.
• On 650 models (size 7 cans: 20.75 inches long) use
the upper tabs and screw slots.
2. Hook the appropriate two slots on the back of the
processor over two tabs on the oor stand.
3. From the back of the stand, screw the stand and
processor together.
• You can leave cover off until nal ushing.
3
12
1
12"
13"
2
5
34

PENTAIR EZ-RO INSTALLATION AND OPERATION GUIDE FOODSERVICE.PENTAIR.COM | 9
CONNECT TUBING
NOTE:
• Follow instructions from “Using Push-to-Connect
Fittings” (page 7) when connecting tubing to ttings.
• At the connections ensure the tubes are cut as
straight as possible.
• Elbows are included in the optional oor stand
kit to keep the tubing from bending too much,
therefore preventing leaks.
• Locate the tank close to the processor, a distance
of 10 feet or less.
Inlet Tubing Connections (3/8" Green Tubing)
1. Install 3/8" green tubing to FEED WATER IN port at
bottom of RO processor.
2. Turn off incoming water supply at valve. Apply three
wraps of PTFE tape to NPT threads of 1/2" NPT x 3/8"
push to connect. Screw in tting to NPT threads on
water supply valve; hand tighten and tighten to no
more than 2ft lbs of torque. Leave enough tubing
for servicing and cut tubing to length. Insert other
end of 3/8" green tubing to 3/8" PTC tting installed
on incoming water supply.
Drain Tubing Connections (1/4" Black Tubing)
3. Install 1/4" black tubing to REJECT WATER OUT port.
4. Air gap: Install the other end of the 1/4" black drain
tubing to an air gap compliant with local codes.
Air gaps are available from Pentair.
(optional part no.: 164-89905)
5. Install the air gap to a drain pipe.
6. Secure drain tubing with 1/4" loop clips [two provided]
as permeate pump will cause drain line to kick.
Tank Tubing Connections (1/2" Blue Tubing)
7. Install 1/2" blue tubing to CONNECT TO TANK port.
NOTE: Two and ve gallon tanks require tank shutoff
valve installation. Install shutoff valve onto 1/4" NPT tting
on tank. Use PTFE tape (thread seal tape) on tank
tting. Twist shut off valve until tight on tank. Do not
tighten over 2ft lbs of torque.
8. Cut tubing to length and make connection to
TANK VALVE. (Save additional tubing for outlet
connection.)
NOTE: Valves on 10 and 16 gallon tanks have a double
O-ring. Make sure the tubing cut is square when viewed
from the side and round when viewed from the end. Make
sure O-rings are in correct location in tting. Insert
tubing past both O-rings until it comes to a hard stop.
5 6
1
87
3 4
INSTALL
2

10 | PENTAIR EZ-RO INSTALLATION AND OPERATION GUIDE FOODSERVICE.PENTAIR.COM
CONNECT TUBING (CONTINUED)
Install Tee with Tank Sampling Valve
9. Install a tee with a sampling valve in a convenient
location on the 1/2" line recently installed to the tank.
This will be used to sample the water going to the tank
and used for ushing the cartridges. Make sure the
valve is closed and the end of the tube stays clean.
Outlet Tubing Connection (1/2" Blue Tubing)
10. Install 1/2" blue tubing into OPTIMIZED WATER OUT
port. This tube will be connected to the equipment after the ushing procedure.
11. Run other end of the blue optimized outlet tube to a clean sink or drain. Secure
tubing (with zip ties or similar) so that it doesn't leap out of position during
ushing. Maintain an air gap.
IMPORTANT: Do NOT connect to equipment at this time. Connection to equipment
will follow ushing process.
NOTE: Make sure outlet tubing will not come dislodged from drain or sink. Water ow
rates can cause the tubing to kick.
• A 1/2" NPT x 1/2" push-to-connect tting is included.
9
tank tank
samplingsampling
valvevalve
(closed)(closed)
teetee
11
10
EZ-200 RO Module - Reject Line Flow Restrictor Guide Hydropneumatic Systems
RO Permeate Production Rate High Medium Low
FEED WATER
TDS / PPM
psi greater than 70
or Lpm greater than 0.4
psi between 50 & 70
or Lpm Between 0.3 & 0.4
Low Pressure /
Low Temperature
Lpm Less than 0.30
Soft Water & >300 GREEN 0.5 Lpm GREEN 0.5 Lpm GREEN 0.5 Lpm
300 to 700 GREEN 0.5 Lpm BLUE 0.7 Lpm GREEN 0.5 Lpm
700 to 1200 BLUE 0.7 Lpm BLUE 0.7 Lpm GREEN 0.5 Lpm
EZ-375 RO Module - Reject Line Flow Restrictor Guide Hydropneumatic Systems
RO Permeate Production Rate High Medium Low
FEED WATER
TDS / PPM
psi greater than 70
or Lpm greater than 0.75
psi between 50 & 70
or Lpm between 0.5 & 0.75
Low Pressure /
Low Temperature
Lpm Less than 0.50
Soft Water & >300 WHITE 1.052 Lpm* BLUE 0.735 Lpm GREEN 0.525 Lpm
300 to 700 WHITE 1.052 Lpm* WHITE 1.052 Lpm* GREEN 0.525 Lpm
700 to 1200 GRAY 1.577 Lpm WHITE 1.052 Lpm* BLUE 0.735 Lpm
*WHITE 1.052 Lpm ow restrictor comes pre-installed in RO processor.
Production rate can be between High/Medium/Low caused by water temperature, incoming pressure (psi), and TDS of water.
NSF testing completed at inuent water conditions of 750 ppm TDS and at 50 psi water, using reject ow restrictor as indicated.
REJECT FLOW RESTRICTOR CHART
FLOW RESTRICTOR INSTALL

PENTAIR EZ-RO INSTALLATION AND OPERATION GUIDE FOODSERVICE.PENTAIR.COM | 11
SYSTEM STARTUP AND FLUSHING PROCESS
PREFILTER AND MINERAL ADDITION FLUSH AND
TANK FILL
1. Install prelter into far left position and mineral
addition cartridge in middle position. Align cartridge
lugs with heads in bracket. Press up and twist a
quarter turn.
2. Make sure the membrane plug is installed.
The processor comes with a pre-installed standard
reject ow restrictor (white). Water conditions and RO
membrane lter size will determine what color ow
restrictor may be required to have your EZ-RO system
operating the most eciently.
Record the feed water conditions of incoming TDS
measured in ppm (parts per million) and the incoming
water pressure measured in psi. Then see the “Reject
Flow Restrictor Chart” on page 10. Follow chart per
system size EZ-200 or EZ-375.
If the chart recommends using the white ow restrictor,
skip steps 3 through 6.
3. The reject ow restrictor that will need to be
replaced is located on the left side of the 1/4" Tee
tting on the top of the processor connected to the
black tubing.
4. Press the gray collet into the tting and pull the left
black tube away from the 1/4" Tee tting. Pull out
the white capillary ow restrictor. This task may
require small pliers.
5. After reviewing the “Reject Flow Restrictor Chart”
on page 10, choose from the bag located with the
manual the color of ow restrictor that best ts
your water requirements. Colors included: green,
blue, gray. (White is pre-installed.)
6. Insert the selected ow restrictor into the 1/4" black
tubing. Firmly insert black tubing into 1/4" Tee tting.
(Reference "Using Push-to-Connect Fittings" on page 7.)
7. On tank, close valve to shutoff position.
8. Open the reject ush valve.
It's the side middle blue handle.
Open = pointing down.
9. Check to make sure the permeate sample port valve
is in closed position.
It's the side bottom blue handle.
Closed = pointing left.
10. Turn the front handles to the following positions:
Inlet valve: top black handle pointed down (open).
Outlet valve: bottom black handle pointed to right
(closed).
3
6
12
mineralmineral
additionaddition
pre-pre-
lterlter
8
open
reject
ush
valve
7
closedclosed
9
permeate
sample
port
valve closedclosed 10
FLUSH
5
4

12 | PENTAIR EZ-RO INSTALLATION AND OPERATION GUIDE FOODSERVICE.PENTAIR.COM
PREFILTER AND MINERAL ADDITION FLUSH AND TANK FILL (CONTINUED)
11. Turn on incoming feed water from source.
• Water will begin to ll RO processor and prelter.
Water will start to run to the drain.
• Pressure gauge will show an increased pressure.
• Check for any leaks. Shut off water and repair
leaks if required. Restart step 11.
12. Slowly open outlet valve (fully) until it is pointing
straight up. This will allow water to ush through the
optimized water outlet tube and reject line.
NOTE: Reject line will pulse from permeate pump.
This is normal.
13. Flush for ve minutes or until water runs clear.
FILL TANK WITH WATER
NOTE: This action lls the tank for a 24 hour tank soak
and rinse.
14. Open tank valve
• Tank will begin lling with ltered water.
15. Close outlet valve.
16. Allow tank to ll.
• Tank ll time varies based on tank size.
• The permeate pump rate of “clicking” will
decrease as the tank nears full.
• When tank is full, the reject ow will stop.
17. Once tank is full, close tank valve.
REMOVE SYSTEM PRESSURE
18. Open outlet valve: rotate until pointing up.
19. Close inlet valve: rotate until pointing to right
• Optimized water outlet tube and reject tube
will exhaust the remaining water that is in the
processor.
20. Pressure should drop to 0 psi.
IMPORTANT: Bring pressure down to 0 psi before
attempting lter changes.
18
20
13
15
14
openopen
16
WAIT
19
19
17 closedclosed
FLUSH
12
11

PENTAIR EZ-RO INSTALLATION AND OPERATION GUIDE FOODSERVICE.PENTAIR.COM | 13
TWENTY-FOUR HOUR FLUSH AND SOAK
Turn blending valve fully closed.
1. Make sure system pressure is down to 0 psi.
2. Remove the membrane plug. Rotate left and pull
down.
3. Store plug under system cover for future use.
4. Install supplied RO membrane cartridge (EZ-200 or
EZ-375) into the farthest right position.
5. Open inlet valve: Rotate until pointing down.
• Water will begin to ll the RO processor.
• Water will start to run out reject and outlet tubes.
• Ensure both lines are secure with water owing
to drain.
6. Flush the system for one hour.
After one hour close the reject ush valve.
It's the side middle blue handle.
Closed = pointing left.
Turn Blending Valve fully closed by rotating knob
clockwise until it stops.
7. Continue to Flush for another 23 Hours.
8. Recommended: Using a graduated cylinder, record
the optimized water ow and reject ow in ounces/
minute or ml/minute.
Fill the graduated cylinder for one minute for each.
Record the values here:
Optimized water_________________oz. or ml_____ /min
Reject water_____________________oz. or ml_____ /min
NOTE: Reject water volume in one minute will probably
exceed 32 oz./1,000 ml. Use a large container or collect
samples in multiple containers and add all of
the collected volumes together.
7
23
HOURS
8
12
removeremove
plugplug
3 4
membranemembrane
cartridge incartridge in
5 6
blending
valve
reject
ush
valve
FLUSH

14 | PENTAIR EZ-RO INSTALLATION AND OPERATION GUIDE FOODSERVICE.PENTAIR.COM
SYSTEM DUMP AND FILL, CONNECT TO EQUIPMENT
1. After 24 hours, stop system ush by closing outlet
valve: rotate 90 degrees so that it points to the right.
2. Open tank valve, this will allow water from the tank
to enter RO processor.
IMPORTANT: Water ow can be very high (5 to 6 GPM).
Make sure outlet tube is secure and running to drain.
TANK DUMP AND FILL
3. DUMP: Slowly rotate to open outlet valve until it is
pointing up to drain tank water.
4. Allow tank to empty. When the ow rate from the
optimized outlet tube signicantly drops, the tank
is empty.
5. FILL: When the tank is empty, close the outlet valve
of system to allow tank to ll by rotating valve until
pointing to right.
• Optimized water will begin to ll tank again.
• Water will be owing from the reject line based on
the ow restrictor your system uses.
6. Repeat steps 3 through 5 for a total of ve dumps
and lls.
4
WAIT
2
openopen
5
1
3
TDS monitor placement option:
The TDS monitor can be removed from the side position
and attached with hook and loop fastener (provided) to
the front of the processor.
FLUSH
6
Empty, FillEmpty, Fill1.1.
Empty, FillEmpty, Fill2.2.
Empty, FillEmpty, Fill3.3.
Empty, FillEmpty, Fill4.4.
Empty, FillEmpty, Fill5.5.

PENTAIR EZ-RO INSTALLATION AND OPERATION GUIDE FOODSERVICE.PENTAIR.COM | 15
SYSTEM DUMP AND FILL, CONNECT TO EQUIPMENT (CONTINUED)
ADJUST BLEND VALVE
Follow steps 7 through 11 to adjust blend valve to
optimize water to mineral levels per customer's
specications.
7. Shut off tank valve.
8. Open outlet valve. Water needs to be owing in order
for the TDS meter to function.
9. Review TDS levels from digital TDS meter. TDS is
measured in ppm or parts per million.
10. Adjust mineral content with the blend valve.
+ To increase mineral content, turn knob counter-
clockwise (lefty loosey).
-To decrease mineral content, turn knob clockwise
(righty tighty).
Monitor consistency when set.
11. Close outlet valve.
12. Open tank valve.
CONNECT TO EQUIPMENT
13. Connect end of outlet tubing to water line to
equipment using the 1/2" NPT by 1/2" push to connect
tting or other appropriate tting.
14. Open outlet valve on RO processor until it is pointing
up to allow optimized water to enter equipment.
• Water will begin to enter equipment.
• Complete nal check for leaks.
System install and ushing complete.
Treated water is now in use at equipment.
NOTE: The blended water tubing/piping and associated
ttings connecting the RO blended water outlet to
the equipment being serviced should be food-grade
material that meets NSF® Standard 51, 61, or similar,
with a minimum pressure rating of 100 psi (6.9 bar,
0.69 MPa). The RO/blended water may react with
metal piping, creating a corrosive condition in addition
to imparting an objectionable taste. Plastic pipe or
reinforced beverage tubing are generally very good
material choices for RO water distribution piping. The
size of the blended water tubing/piping should be 1/2-
inch (12.7 mm) O.D. minimum.
13
12
openopen
14
78
11
109
CONNECT TO EQUIPMENT
FLUSH
7
closedclosed

16 | PENTAIR EZ-RO INSTALLATION AND OPERATION GUIDE FOODSERVICE.PENTAIR.COM
FILTER CHANGE AND FLUSHING PROCEDURE
RECOMMENDED: Replace mineral feed cartridge
every 6–12 months. For 200 and 375 systems use 4CM
cartridge. RO membranes should be replaced every
12-24 months. Prelters should be replaced every 4-6
months when capacity is reached, or when feed water
pressure or ow becomes inadequate.
REMOVE FILTERS
1. Turn inlet valve right to the OFF (horizontal) position.
NOTE: Feed water is shut off to lters in this “lter
change” position.
2. Place bucket under RO processor. Open permeate
sample port valve (pointing down) to release pressure.
3. Make sure incoming pressure is at 0 psi.
4. Remove prelter, mineral addition, and membrane.
Twist lters a quarter turn to left and pull down.
Keep membrane if it will not be replaced. Dispose of
old cartridges that are being replaced.
REPLACE PREFILTER AND MINERAL ADDITION
CARTRIDGES, ADD PLUG TO MEMBRANE PORT
5. a. Add new prelter to position 1
(insert and turn 90 degrees to right).
b. Add new mineral addition cartridge to position 2
(insert and turn 90 degrees to right).
c. Add RO membrane bypass plug (stored under cover)
to the farthest right position (insert and turn 90
degrees to right).
6. Close the permeate sample port valve (pointing left).
FLUSH PREFILTER AND MINERAL CARTRIDGES
7. Turn reject ush valve to open position (pointing down).
8. Close tank valve.
• Optimized water to equipment will be paused
during this step.
9. Turn outlet valve to closed position – putting
equipment into BYPASS.
10. Direct end of the tank sampling valve tube into a
bucket or drain. Open tank sampling valve.
11. Turn inlet valve to open (vertical) position.
• Water will start to ll prelter and mineral
cartridges.
• Water will run from the reject line and tank
sampling valve.
12. Flush prelter and mineral cartridge for 10 minutes
or until water runs clear.
43
remove all threeremove all three
21
5
mineralmineral
addn.addn.
pre-pre-
lterlter
memb. memb.
plugplug
6
permeatepermeate
samplesample
portport
valvevalve
7
reject
ush
valve
8
closedclosed
910
tank tank
samplingsampling
valvevalve
(open)(open)
11 12
FILTER CHANGE

PENTAIR EZ-RO INSTALLATION AND OPERATION GUIDE FOODSERVICE.PENTAIR.COM | 17
FILTER CHANGE AND FLUSHING PROCEDURE (CONTINUED)
RETURN EXISTING RO MEMBRANE OR REPLACE
WITH NEW RO MEMBRANE (IF REQUIRED)
13. Turn inlet valve to closed position (horizontal).
14. The pressure gauge will reduce to 0 psi.
15. Remove membrane bypass plug (turn 90 degrees,
left and pull down). Store under cover.
16. Insert RO membrane into the farthest right position
(insert and turn 90 degrees to right).
17. Turn inlet valve to open position (vertical).
• Water will start to ush through membrane. Water
will run from reject line and tank sampling valve.
18. Close tank line sampling valve.
19. Open tank valve if using existing membrane. Leave
closed if installing new membrane.
FLUSH NEW MEMBRANE
IF REUSING EXISTING MEMBRANE, SKIP TO STEP 25
20. If needed, put system into partial bypass.
• Turn inlet valve 45 degrees.
• Turn outlet valve to the right.
NOTE: Partial bypass allows feed water to go to
equipment and also allows water to ush RO membrane.
The partial bypass setting will allow untreated water to
go to equipment during the RO membrane ushing.
21. Make sure that the reject ush valve and the
permeate sample port valves are both open.
Open = pointing down.
22. Continue to ush membrane for one hour.
23. After one hour close reject ush valve.
Closed = pointing left.
24. Continue to ush membrane for 23 hours.
NOTE: Permeate water can be ushed through the
tank sampling port instead of the permeate sample
port. To do this, close the tank valve, close the
permeate sample port and open the tank sampling port.
You can run additional tubing from the tank sampling
port to a drain.
23
15 16
14
17 18
tank tank
samplingsampling
valvevalve
(closed)(closed)
19
openopen
removeremove
plugplug
20
partialpartial
bypassbypass
21
reject
ush
valve
permeate
sample
port
valve
openopen
openopen 22
23
HOURS
24
23
reject
ush
valve
closedclosed
FILTER CHANGE
13

18 | PENTAIR EZ-RO INSTALLATION AND OPERATION GUIDE FOODSERVICE.PENTAIR.COM
FILTER CHANGE AND FLUSHING PROCEDURE (CONTINUED)
RETURN RO TO NORMAL SERVICE
25. After new membrane ush, or initial ush of existing
membrane, make sure that both the reject ush valve
and the permeate sample port valve are closed.
Closed = pointing left.
26. Make sure the tank sampling valve is closed.
27. Make sure tank valve is open.
28. Do a nal check. Ensure system inlet and outlet are
returned to service positions: inlet (pointed down),
outlet (pointed up).
NOTE: This lter change process will cause the
customer's equipment to have temporary delay of
use of optimized water systems during the 10 minutes
of ushing. (New RO membrane ushing will cause
extended interruptions to service during ushing.)
FILTER CHANGE
26
tank tank
samplingsampling
valvevalve
(closed)(closed)
25
reject
ush
valve
permeate
sample
port
valve
closedclosed
closedclosed
28
27
openopen

PENTAIR EZ-RO INSTALLATION AND OPERATION GUIDE FOODSERVICE.PENTAIR.COM | 19
TDS MONITOR
This model of the EZ-RO comes preinstalled with a
TDS (Total Dissolved Solids) monitor. This TDS monitor
measures the combined TDS from the mineral feed
cartridge and blend valve going to the storage tank.
Total Dissolved Solids is the total amount of inorganic
elements, including minerals, salts or metals, dissolved
in a given volume of water, other than the pure
water molecules (H2O) and suspended solids. TDS is
expressed in parts per million (ppm).
Additional hook and loop is supplied to attach the TDS monitor
to another surface within the maximum length of wire.
SPECIFICATIONS
• TDS Range: 0-9990 ppm
• Resolution: 1 ppm (0-999); 10 ppm (1000-9990,
indicated by a blinking ‘x10’ image)
• Accuracy: +/- 2%
• Cable Length: 24.5" (including sensor)
• Power Source: 2 x 1.5V button cell batteries
(size: 357-A) (included)
• Battery Life: approximately one year
• Dimensions: 7.6 x 2 x 4.7
USAGE
1. Press the “ON/OFF” button.
2. The monitor will display the TDS level.
3. The displayed TDS will be most accurate after
approximately 10 seconds.
4. Turn off the unit. It will automatically shut off
after 10 min.
CHANGING THE BATTERIES
1. Unscrew the three metal screws (not the orange
plastic screw) on the rear of the unit and remove
the back panel.
2. Remove the batteries.
3. Replace with two new LR44 batteries. Ensure the
polarity is correct.
4. Close the back panel and replace the screws.
RECALIBRATION
Your monitor was factory calibrated to 342 ppm (NaCl).
This level is suitable for most tap water/ltered water
applications. However, you may need to recalibrate
based on your needs, as well as from time-to-time to
ensure best results.
1. Purchase a
calibration
solution from
your dealer
that is correct
for your needs.
2. Disconnect the
T-Fitting from
its hose. Do not remove the sensor from the T!
3. Ensure the orientation of the sensor to the tting
is correct, as in the illustration.
4. Turn on the monitor and place the T-Fittings (with
the sensor in it) into the calibration solution. You
will get a reading.
5. If the reading on the monitor does not match
the solution, adjust the reading up or down by
gently turning the orange screw on the rear of the
monitor clockwise or counter-clockwise.
6. The monitor should read approximately 10%
below the calibration solution. The monitor is
designed for owing water and this discrepancy
will compensate for that.
NOTE: If you are calibrating with a owing solution,
ignore this.
7. Once the reading is correct, turn the monitor off
and remove from the solution.
Your monitor is now calibrated.
CARE, MAINTENANCE AND TROUBLESHOOTING
• Never touch the sensor pins, as skin oils may
adversely affect the TDS measurement.
• To clean the sensor pins, clean with rubbing alcohol
and let air dry.
• If you notice the readings are off from what they
should be, replace the batteries or re-calibrate.
If your meter displays an ‘ERR’ message this could be
for one of the following reasons:
• The TDS level is out of the range of the meter (over
9,990 ppm).
• The sensor connector has been pulled out of the
monitor.
• There is something
wrong with the unit.
Contact Pentair
customer service.
TDS MONITOR

20 | PENTAIR EZ-RO INSTALLATION AND OPERATION GUIDE FOODSERVICE.PENTAIR.COM
Problem Possible Cause Solution
No water running to
equipment.
Water supply is turned off. Turn on the water.
Water supply is blocked.
Prelter is plugged.
Clear blockage.
Change prelter.
Membrane cartridge is fouled. Replace membrane cartridge.
Incoming water line is crimped or
pinched off.
Check incoming line and verify no crimps in line. Remove any pinch points.
Running out of
optimized water
Operating pressure reduced Prelters need to be replaced.
Very cold feed water Feed water temperature too low, increase water temperature up to 80°F to
increase production with tempering valve or check if larger RO membrane or
tank can be added.
Valves are in incorrect positions Ensure the inlet valve and outlet valve on the RO processor are open. See
hang tag for normal operation. On the tank, ensure the outlet valve is open.
Demand exceeds system capacity Check RO permeate ow. Water temperatures of 48°F will reduce permeate
output by 50%. Inlet pressures of 30 psi will reduce permeate output by
more than 50% compared to 60 psi inlet. Consult with technical support
if permeate ow is too low. Determine if the demand is unusual or
inconsistent, or resize system with higher capacity membrane and/or tank.
Reverse osmosis membrane fouled Replace reverse osmosis membrane every 12-24 months. See "Short
membrane life" page 23 for additional information.
Low feed water pressure Install optional feed water pressure booster pump to get pressure up to 60-
80 psi. Check outlet pressure of existing booster pump if already installed.
Poor quality
optimized water
Blend valve out of adjustment Follow steps on page 17 to adjust blending valve.
Low TDS rejection
<75%
Inlet and outlet valve not in normal
operation
See Hang tag for normal operation. Measure reject ow rate and compare
to reject ow restrictor chart on page 10. Replace prelter, capillary ow
control and RO membrane as needed. When moving inlet and outlet handles
from bypass to service positions, you may detect a pressure imbalance that
prevents the outlet handle from reaching full nal position. Correcting this
issue by turning the valve outlet or inlet handles open and closed again, will
help equalize pressure to allow inlet and outlet valves handles to fully engage
to the service position.
Blend valve out of adjustment Follow steps on page 17 to adjust blending valve.
Membrane failure Measure TDS out of permeate sample port. Measure reject ow rate. Replace
prelter and RO membrane as needed. Check to see if the capillary ow
control is plugged. Replace capillary ow control as needed.
Nonblended optimized
water <25 ppm
Mineral feed cartridge exhausted Replace mineral feed cartridge with 4CM for 375 system, 7CM for 650
systems every 6–12 months.
TROUBLESHOOTING
TROUBLESHOOTING