Antunes AQ-RO-400 User manual

P/N 1011596 Rev. A 05/21
®
Reverse Osmosis
System
Owner’s Manual
Models
AQ-RO-400
AQ-RO-600
Manufacturing Numbers:
9710141
9710142
9710143
www.antunes.com CAUTION: Read all instructions before using the unit.
Original Instructions

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P/N 1011596 Rev. A 05/21
2
General
This manual provides important safety,
installation, and operating procedures.
All information contained in this manual
should be read prior to installing and
operating the system.
This system is manufactured from the
nest materials available and is assembled
to strict quality standards. This system
has been tested at the factory to ensure
dependable trouble-free operation.
Warranty
Information
Please read the full text of the Limited
Warranty in this manual.
If the system arrives damaged, contact
the carrier immediately and le a damage
claim with them. Save all packing materials
when ling a claim. Freight damage claims
are the responsibility of the purchaser and
are not covered under warranty.
The warranty does NOT extend to:
yDamages caused in shipment or
damage as result of improper use.
yInstallation of electrical service.
yNormal maintenance as
outlined in this manual.
yMalfunction resulting from
improper maintenance.
yDamage from moisture leaking into
electrical
components.
yDamage from tampering with,
removal of, or changing any
preset control or safety device.
IMPORTANT
Antunes reserves the right
to change specications and product
design without notice. Such revisions do
not entitle the buyer to corresponding
changes, improvements, additions or
replacements for previously purchased
equipment.
IMPORTANT
Keep these instructions for future
reference.
If the unit changes ownership, be sure
this manual accompanies the equipment.
Service/Technical
Assistance
If you experience any problems with the
installation or operation of your system,
contact Antunes Technical Service at
[phone] (toll free).
Fill in the information in the next column
and have it handy when calling for
assistance. The serial number is on the
specication plate located on the system.
Purchased From
Date of Purchase
Model Number
Serial Number
Mfg. Number
Suggested replacement period for the RO
Cartridge is 1 year.
IMPORTANT
This equipment is to be installed to
comply with the basic plumbing code
of the Building O󰀩cials and Code Ad-
ministrators, Inc. (BOCA) and the Food
Service Sanitation Manual of the Food
and Drug Administration (FDA).
IMPORTANT
Water Flow Regulator Assemblies are
NOT interchangeable. Operating the
system with the wrong Water Flow
Regulator or without a regulator can
damage the system, cause personal
injury, and voids the warranty!
CAUTION
When installed on metallic plumb-
ing, a properly sized electrical bonding
jumper must be installed across the
inlet and outlet pipes serving this unit.
Contents
General 2
Warranty Information 2
Service/Technical Assistance 2
Important Safety Information 3
Specications 4
Replacement Cartridges 4
Performance Data Sheet 5
Performance for % Reduction 5
Water Mark Listing 6
Operation 7
Overview 7
Installation 8
Equipment Setup 8
Mounting the System 8
UV Installation 9
UV Connection 9
Drain Connection 10
Controller Operation 11
Inlet Water Plumbing 12
System Inlet Connection 12
Filtered Water Outlet Connection 12
Install Pre-lters RO Membrane 12
Rinsing the RO System 13
Sanitizing the Plumbing 14
Maintenance 14
Replacing the RO Cartridge 14
UV System (Option) Maintenance 14
Replacing the Carbon Cartridge 15
Replacing the Prelter Cartridge 15
Sanitization 15
Initial Performance Verication 16
RO Recovery Calculation 16
Semi-Annual Tasks 16
Check Tank Air Pre-Charge 16
Annual Tasks 16
Change Cartridges 16
Troubleshooting 17
Replacement Parts 18
Exploded View 18
Parts List 19
NOTES 21
Limited Warranty 22

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P/N 1011596 Rev. A 05/21 3
Important Safety
Information
In addition to the warnings and cautions in
this manual, use the following guidelines to
safely operate the system:
yRead all instructions before
using equipment.
yInstall or locate the equipment
only for its intended use as
described in this manual.
yDo NOT use corrosive
chemicals in this equipment.
yDo NOT operate this equipment
if it has a damaged cord or plug;
if it is not working properly, or if it
has been damaged or dropped.
yThis equipment should be serviced
by qualied personnel only. Contact
Antunes Technical Service for repair.
yDo NOT immerse cord
or plug in water.
yKeep cord away from
heated surfaces.
yThis equipment should be
supplied with only cold water.
yThe use of saddle valves
are not permitted. Please
consult your local plumber.
The following warnings and cautions
appear throughout this manual and should
be carefully observed.
yThis equipment is to be installed to
comply with the local plumbing code
and any other applicable code.
yWater pressure must not
exceed 100 psig (690 kPa). To
reduce water pressure, install
a water pressure regulator and
set to suit the application.
yWhen installed on metallic
plumbing, a properly sized
electrical bonding jumper must
be installed across the inlet and
outlet pipes serving this unit.
Protect from becoming dry
If the membrane dries out, irreversible
damage to the RO membrane may result.
Protect the lter from becoming dry by
keeping it wet and sealed at all times.
Protect from freezing
If the RO membrane freezes during
operation or storage, irreversible damage
to the membrane and brittle cracking of the
cartridge or housing may result.
Protect from direct sunlight or other UV
sources
Avoid long-term exposure to direct sunlight
or other UV sources. The RO should be
stored in a dark location.
Protect from high temperatures or
abrupt variation in temperature
The maximum operating temperature is
100°F (38°C). Avoid abrupt variations in
temperature. Any temperature variation
should be made slowly.
Protect from rough handling or
dropping
Mechanical damage, external breakage,
and/or internal breakage of the lter can
result if the system is dropped or bumped.
Handle with care at all times during
transportation and installation.
Protect from organic solvents and
concentrated acids
Prevent any and all contact of the
membrane with strong solvents, solvents
containing chlorine, or concentrated
acids. Do NOT use strong solvents or
concentrated acids on any plastic parts
of the lter system. Examples of some
solvents to avoid: acetone, methyl
acetate (nail polish remover); hexane
(spot removers); turpentine, toluene
(paint thinners); dry cleaning solutions,
insecticides.
Protect from abrasive material
The membranes must be protected from
abrasive materials like shavings left in a
pipe. Abrasive materials in contact with
the membrane can cause irreversible
damage to the membrane. All pipes must
be ushed clean before installing the
lter. All plastic parts of the lter system
must be protected from sharp objects like
knives, sand paper, or other tools. Cutting
or nicking a plastic part can weaken it
and cause a leak. Do NOT use abrasive
cleansers on any plastic parts.
Protect from water hammer
The system must be protected from shock,
pressure surges, or pulsation that may
occur inside water pipes. Water hammer
occurs in pipes when a valve or faucet
shuts quickly. Install a water hammer
arrestor (pressure vessel containing
compressed air separated from the water
by a diaphragm) to reduce pressure shock.

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P/N 1011596 Rev. A 05/21
4
Specications
Model &
Mfg. No.
Width
(A)
Depth
(B)
Height
(C)
Operating
Weight
AQ-RO-400
AQ-RO-600 27”(69cm) 13” (33 cm) 32” (80 cm) 65lbs (30 kg)
Model &
Mfg. No. Volts Amps Hz Watts
AQ-RO-400
AQ-RO-600
(UV Option)
120-240V
(220V) 0.5 A 50 Hz 110 W
Replacement Part Number
AQ-RO-400
AQ-RO-600
Sediment Prelter Cartridge (Single Pack) 7100040
Carbon Prelter Cartridge (Single Pack) 7000834
AQ-RO-400 Reverse Osmosis Cartridge (Single Pack) 7002303
AQ-RO-600 Reverse Osmosis Cartridge (Single Pack) 7002304
Replacement Cartridges
CAUTION
When installed on metallic plumbing,
a properly sized electrical bonding
jumper must be installed across the
inlet and outlet pipes serving this unit.
CAUTION
To ensure proper installation wall
anchors for unit must be rated for
AT LEAST 60lbs (30 kg) or MORE for
proper operation weight support.
A
Reserve 200mm
for tubing connect
(100mm for each side)
C
Reserve 200mm
for tubing connect
(100mm for each side)
B
Allow at least 2”(50mm) for cartridge change

®
P/N 1011596 Rev. A 05/21 5
System Capacities 400 GPD System 600 GPD System
Minimum Operating Pressure 10 psi 10 psi
Maximum Operating Pressure 100 psi 100 psi
Minimum Operating Temperature 40° F (4° C) 40° F (4° C)
Maximum Operating Temperature 100°F (38° C) 100°F (38° C)
pH Range 4-10 4-10
Maximum Total Dissolved Solids
(TDS) 1,000 ppm 1,000 ppm
Maximum Hardness 60 gpg 60 gpg
Site Density Index < 5 < 5
Iron, Hydrogen Sulde, or
Manganese 0 0
Nominal Capacity 400 600
(Membrane
performance after 24
hours at 77° F (25° C),
500 ppm TDS, and 70
psig)
(Membrane
performance after 24
hours at 77° F (25° C),
500 ppm TDS, and 80
psig)
Performance Claims for Percent Reduction
Substance Minimum % Reduction
Total Dissolved Solids (TDS) 94%
NOTE: Do not use with water that is microbiologically unsafe or of unknown
quality without adequate disinfection before or after the system. Systems
certied for cyst reduction may be used on disinfected waters that may
contain lterable cysts.
Performance Data Sheet

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P/N 1011596 Rev. A 05/21
6
Water Mark Listing

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P/N 1011596 Rev. A 05/21 7
Operation
Overview
yNormal Operation Mode
During Normal Operation Mode,
water enters the Inlet and ows
through the Filter before exiting the
outlet as usable product water.
The drain line runs continuously as
long as the system is making water.
This drain line ushes the minerals
removed by the RO membrane.
NOTE: DO NOT plug or stop the water
ow from the drain line. If this
ow is stopped, water will
continued to be ltered, but the
system will not ush. This will
cause the RO membrane to plug
prematurely and reduce the life
of the RO System.
yTank Full Mode
When the tank is full, no water
runs out of the drain line.
CAUTION
Stopping the drain ow can cause the
Filter to plug prematurely and may
reduce the life of the lter. Consult
the factory for more information.
Figure 1. System Components
Figure 2. Water Connections
TDS MONITOR
FLUSH VALVE
CHECK VALVE
BLEND VALVE
SOLENOID VALVE
LOW PRESSURE VALVE
BRINE CONTROLLER VALVE
HIGH PRESSURE VALVE
T
T
T
F
B
S
H
BR
F
B
PUMP
S
H
BR
LPS
LPS
PRE-FILTER
CARBON
UV
RO MEMBRANE
PERMEATE INLET DRAIN
UV option on systems
9710141 and 9710142

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P/N 1011596 Rev. A 05/21
8
Installation
1. Open the large box. It should
contain:
a. Plate-Mounted RO System
b. Prelter Cartridge
c. Prelter Carbon Cartridge
d. RO Cartridge
e. Owner’s Manual
NOTE: If any parts are damage, contact
Antunes Technical Service
IMMEDIATELY at:
[phone] (toll free).
2. Remove all packing materials
and protective coverings from the
system and bracket.
3. A tank is not included with the RO
system. The tank must be sourced
separately.
Equipment Setup
Plumbing
NOTE: The system must be connected
to the COLD water line. Do NOT
connect the system to the hot
water line.
The RO system uses the following
connections:
Connection Description
System Inlet 3/8” OD Tube
System Outlet
(Product Water) 1/4” OD Tube
Drain 1/4” OD Tube
Figure 3. Cover Removal and Mounting the System
When making a plumbing connection to
the system, use a back-up wrench on the
supporting plumbing. Always use a quality,
approved pipe sealant or thread seal
tape on pipe threads. Do NOT allow pipe
sealant inside pipes.
Do NOT over tighten the connections.
Use plastic ttings when connecting to the
plastic connections of the system.
If soldered plumbing is used, do NOT
apply heat to, or near, the ltration system.
Use union (O-ring seal) connections for
ease of installation and future servicing.
Suggested Tools and Supplies for
Installation
The following tools and supplies are
suggested to help with the installation:
yScrewdriver
yAdjustable Wrenches
yDrill with Bits
yLevel
yTape Measure
yPipe Dope or Thread Seal Tape
yTwo Gallon Bucket
yFresh, Unscented Liquid
Chlorine Bleach
yPipe Wrenches
yHose or pipe for drain line
Mounting the System
The RO System comes with a Mounting
Bracket for the system. When mounting
the system, pay attention to the following
guidelines:
yAllow su󰀩cient access for
prelter and RO membrane
replacement. The prelter should
have at least 2” below each
bowl for cartridge change.
yDo not mount the system or tank
above an electrical outlet.
yMount the system near a drain
for ushing operations.
yMount the system after the
base ltration system and
before the equipment selected
for this water quality.
ySecure the Mounting Bracket into
wall studs or with the appropriate
heavy duty mounting hardware.
Refer to Figure 3A for cover removal.
1. Remove the cover by rst
unfastening the two thumb screws
at the front of the system (Yellow
arrows).
2. Lift cover. Set cover aside.
Refer to Figure 3B for mounting hole
locations. Plan your mounting accordingly.
Follow these steps to secure the RO
system to the wall (See Figure 3B):
1. Secure the RO system to the wall
using the holes provided (red
arrows).
2. Make sure the mounting hardware
secures the system into wall studs
or use the appropriate mounting
expansion screws.
Refer to the tank manufacturer for tank
mounting instructions.
It is recommended that the tank be
mounted as close to the system as
possible.
3A 3B

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P/N 1011596 Rev. A 05/21 9
UV Installation
(Option on systems 9710141 and
9710142)
NOTE: The UV must be connected into
the plumbing circle, otherwise
the water will come out of the
system.
WARNING: The UV light given o󰀨 by
the UV bulb can cause serious
burns to unprotected eyes
and skin. Do NOT perform any
maintenance tasks with the bulb
plugged in and powered on.
Pay attention to the following guidelines
when working with the UV light:
yNever look directly at an
illuminated UV lamp
yAlways unplug the UV unit before
performing any work on the UV
bulb or disinfection system
yNever operate the UV bulb
outside of the UV housing
It is recommended that the UV light be
mounted below the ltration system
horizontally.
The UV light comes with two clips for
mounting and a power supply.
1. Refer to Figure 4 and 5, mount the
clips beside the ltration system
with the appropriate mounting
hardware.
NOTE: Pay attention to the distance
between the two clips, it is
recommended that the distance be
approximately 2/3 the length of the
UV light.
2. Take out the UV bulb and the power
supply from the box.
3. Insert the bulb into the UV housing.
Only keep the end of the bulb out.
4. Connect the bulb and the power
supply.
5. Attach the power supply to the UV
housing.
6. Place the UV housing onto the clips
properly, refer to Figure 5.
Figure 4. UV Clip
Figure 5. UV Unit Mounting
Figure 6. UV Connection
UV Connection
The UV System must be connected to
the RO system before connecting to inlet
water.
There are two tubes from the ltration
system. Each has a specic label at the
end of each tube. When connecting the
UV, please follow the instructions below:
1. Connect the tubing to the UV, as
indicated by the attached label.
Each label on the tubing should be
the same label as that on the UV
connection (Figure 6).
2. Connect to the drinking water port if
needed (OPTIONAL).

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P/N 1011596 Rev. A 05/21
10
Drain Connection
The drain is for ushing particle buildup out
of the system during operation.
Install a su󰀩cient length of 3/8” OD tubing
(not supplied) from the drain outlet on top
of the RO system to the drain.
When connecting the drain hose, pay
attention to the following guidelines:
yThe drain line plumbing must be
able support the ow rate when the
system operates.
yThe drain line leading out of the
system must be as short as possible
and slope downwards without any
kinks or loops.
yThe drain line plumbing must be
positioned and secured at least 2
inches above the drain (Figure 7).
This air gap protects the system
from contamination in the event of a
backed-up drain.
yThe drain used must not be blocked
or restricted.
yThe drain used must be as large or
larger than the drain line plumbing.
yThe drain line from the system
should be secured at the drain using
appropriate mounting hardware.
NOTE: The drain MUST accommodate a
ow of up to 3 gpm.
2” (5.1 cm)
minimum
2” (5.1 cm)
minimum
Floor
Drain
Secure
End
Drain Line
from System
Drain Line
from System
Secure
End
Drain
Standpipe
Figure 7. Drain Line Plumbing

®
P/N 1011596 Rev. A 05/21 11
Figure 8. Panel Screen
Controller Operation
1. Power On/O󰀨
Press “POWER” button when
system is in o󰀨 status, buzz one
time and screen ush three times,
system is “ON”; Press “POWER”
button again, system is “OFF”.
2. Manual ush: Press “SELECT”
button for 2 seconds, system ush
for 30 seconds;
3. Settings:
Default Values
W = 4 hours
X = 6 months
Y = 6 months
Z = 24 months
3.1 Press “SELECT” button for 10
seconds, system comes into setting
status.
Press “SELECT” button to select
“PROCESSING” & “F1” & “F2” &
“F3”
When “F1” & “F2” & “F3” are
selected, the letter ickering, the
light o󰀨;
The value of each status is shown
at the TDS area, the number will
plus “1” by pressing “RESET” button
one time.
When system comes into Setting
Mode, value of “W” & “X” & “Y” &
“Z” will be “0”.
3.2 Press “SELECT” button for
20 seconds, the RO membrane
lifetime will be calculated by water
processing time, the value shown at
the TDS area, the number will plus
“1” by pressing “RESET” button one
time. (Lifetime = “Z” * 10 hours)
3.3 Cartridge life reset: Press
“RESET” for 2 seconds, press
“SELECT” to choose the right
symbol which the element is being
replaced, the selected symbol
ickers, press “RESET” for 2
seconds again, the cartridge life has
been reset.
3.4 Factory reset: Power o󰀨
the system, press “POWER” &
“RESET” for 10 seconds.
4. Cartridge lifetime calculated:
When the system is powered on,
the lifetime bases on the calendar
time starts to calculate. When the
running time is activated on the
RO membrane, the RO membrane
lifetime is based on the calendar
time and running time which value
is reached rst.
Items Status
Filters
F1 Prelter
a. 10-100% Life: Always on;
b. 0-10% Life: Symbol Flickering;
c. 0% Life: Symbol O󰀨, Maintenance IL on, Buzz 3 times/min
F2 Carbon
F3 - RO Membrane
Status
PROCESSING a. Letter on, ickering: system ushing water
b. Letter ickering, IL o󰀨: “W” setting
FLUSH Letter on, IL ickering: system ushing water
STANDBY Letter on, IL ickering: HPV activated, system standby
SHORTAGE Letter on, IL ickering: Buzz 10 times/30 min;
LPV activated, inlet water shortage
MAINTENANCE
a. Letter on, IL ickering: Buzz 3 times/min: cartridge consumed;
b. Letter on, IL ickering: Screen ickering, Buzz always on:
system producing water for “W” hours continuously
Logo Antunes Always on, blue background light
TDS 0-999 TDS of inlet water permeate water, cycled every 5 seconds
Buttons
POWER Press to power on/o󰀨 the system
SELECT
a. Press for 10 seconds; System comes into Setting process;
“W” & “X” & “Y” & “Z” settings
b. Press to select the right item when in setting Mode & Reset
Mode
c. Press for 20 seconds : Activate running time life for F3
RESET Press for 2 seconds: system comes into Reset Mode; select the
right item, press for another 2 seconds, reset cartridge life
W= Time for processing water continuously; X = F1 lifetime; Y = F2 lifetime; Z = F3 lifetime; IL =
Indicator Light
NOTE: When RO lifetime is calculated by Calendar time and Running time, system
would alert based on which value is reached rst.

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P/N 1011596 Rev. A 05/21
12
Inlet Water Plumbing
Filtered water from a base ltration system
should be connected to the inlet of the RO
System.
Connect Beverage hose (not supplied) to
the outlet of the base ltration system.
Before connecting to the RO System
inlet, the plumbing from the base ltration
system must be ushed clear of all debris.
Hold a bucket at the inlet water line and
slowly open the base ltration water valve.
Allow the plumbing to ush until all debris
is removed.
System Inlet Connection
The System Inlet has a 3/8” OD tube
connection at the Inlet (Figure 9).
Filtered Water Product Outlet
Connection
The System Permeate has a 1/4” OD tube
connection (Figure 9). Use 1/4” OD tubing,
or larger (not supplied) to connect between
the product outlet and the downstream
equipment.
A Tee tting should be installed in this line
from the system to connect to a tank (not
supplied)(Figure 10).
It is recommended that a shut-o󰀨 valve be
installed in the line to the tank.
Install Pre-lters and RO
Membrane
If not already installed, install the Pre-lters
and RO Membrane.
The white sediment prelter must be
installed in the left prelter housing,
closest to the water inlet.
The carbon prelter must be installed
in the right prelter housing, after the
sediment prelter.
The RO membrane must be installed with
the brine seal on the right, nearest to the
RO membrane housing inlet. It should only
be inserted into the RO housing from the
right side.
1. Pull out the tube which is inserted
into the RO housing’s inlet (Figure
11a)
2. Using the supplied wrench,
unscrew the RO housing end cap
and insert the RO membrane into
the housing. The RO membrane
must be installed with the brine
seal on the right side, nearest to
the RO membrane housing inlet. It
should only be inserted into the RO
housing from the right side.
Figure 10. Recommended Tank Connection
Figure 11. Prelter and RO Membrane Housings
Base Filter
System
RO
System
To store
Shut-off
Valve
Tank
Figure 9. Inlet and Outlet Connections
Permeate Inlet Drain
3. Reattach the RO membrane
housing end cap.
4. Insert the tube that was removed in
step 1 into the RO housing inlet.
Sediment
Prelter Carbon
Prelter
RO Membrane
Housing
RO Membrane
Housing End
Cap
Figure 11a

®
P/N 1011596 Rev. A 05/21 13
Rinsing the RO System
The RO System must be rinsed to remove
any air and protective solution before the
system is used.
NOTE: The RO System must be rinsed
TO DRAIN before use. Rinsing
to drain removes storage
solution and air.
1. Check that all tubing connections
are rmly seated. Check to see
that the cartridge bowls are fully
engaged. Failure to keep the
cartridge bowls fully engaged
will result in accidental leaks and
ooding.
2. Make sure the Tank valve is
CLOSED.
3. Connect tubing to the permeate
outlet and route to a drain. This
tube should be as short as possible
in order not to a󰀨ect the brine or
product ow rates.
4. Make sure the blending valve is
completely closed for rinsing.
5. Open the inlet valve and let water
into the system.
6. Plug the power cord into an outlet.
The pump will come on and air in
the pre-lters and RO membrane
will come out. Wait 5-10 minutes
until all air has been removed.
7. Adjust the brine control valve so that
the pressure gauge is 80 psi.
Opening the brine control valve
increases the brine ow rate and
lowers the membrane pressure and
product water ow rate.
8. Continue to ush the system for
at least one hour, or until the
TDS output is steady and in an
acceptable range.
9. Use the TDS blending valve located
on the front of the system, to adjust
the TDS of the product water
leaving the system. Use the front-
mounted TDS monitor as a guide.
NOTE: If you are not going to adjust the
TDS, make sure the blending
valve is completely closed.
The brine ow adjustment
will have to be adjusted each
time the TDS blending valve is
adjusted.
Figure 12. System Valves
Pressure Gauge
TDS
Blending
Valve
Brine Control
Valve

®
P/N 1011596 Rev. A 05/21
14
Sanitizing the Plumbing
The plumbing from the RO System
must be sanitized to eliminate possible
contamination that may have occurred
during the installation process.
One ounce (30 ml) of liquid chlorine bleach
(regular bleach, unscented 5.25 % - 6 %
sodium hypochlorite) or Kay-5 sanitizer
solution (Sodium Dichloro-s-Triazinetrione
Dihydrate, 6%) or equivalent can be used
to sanitize the plumbing.
The Kay-5 sanitizer solution is made by
dissolving a 1 oz. packet of Kay-5 powder
in 2 oz. (60 ml) of clean warm water. This
can be done by removing 1 inch from the
top of the Kay-5 packet and adding the 2
oz. of warm water to the packet. Mix with
a co󰀨ee stirrer to dissolve. When added to
the plumbing from the RO System, this will
create a 60-100 ppm chlorine solution.
NOTE: Follow the handling and safety
instructions supplied with the
sanitizer.
1. Follow the steps in the Rinsing the
RO System section of this manual.
2. Turn o󰀨 the water to the system.
3. Close the Tank valve.
4. Allow the system and plumbing
to drain by opening the line
downstream to the RO System.
5. Disconnect the line to the
equipment being served at the Tee
tting and pour the sanitizer into
the line using a cup or funnel. Be
careful not to spill the sanitizer onto
clothing or skin.
6. Reattach the line to the Tee tting.
7. Slowly turn on the Tank valve and
allow water to ow through the line
and out to the equipment.
8. Let stand without water ow for at
least 15 minutes to allow time for
the pipes to be sanitized.
9. After 15 minutes without water ow,
open the line at the equipment and
allow water and sanitizer to ow
until the presence of sanitizer is
gone.
10. Reconnect all lines and turn on
water to the RO. The system is now
ready for use.
Maintenance
Replacing the RO Cartridge
NOTE: Always install a new Carbon
cartridge after replacing the RO
Cartridge.
1. Turn o󰀨 water to the system by
closing the feed water valve and
unplug the system power cord from
the outlet.
2. Close the tank valve.
3. Depressurize the system.
4. Pull out the tube which is inserted
into the RO housing’s inlet.
5. Using the supplied wrench, unscrew
the RO housing end cap and
remove the old RO cartridge.
NOTE: Water may drain from the
system and cartridge as it is
removed.
6. Unwrap the new cartridge and
record the serial number of the new
cartridge.
7. Check to make sure that all
the O-rings in the end caps are
lubricated with a food grade silicone
lubricant.
8. Insert the RO membrane into the
housing. The RO membrane must
be installed with the brine seal on
the right side, nearest to the RO
membrane housing inlet.
NOTE: Make sure the cartridge is
installed with the brine seal to
the right (RO housing inlet), if
not, the system will not work
properly.
9. Reattach the RO membrane
housing end cap. Reinstall the
tube that was removed previously
by pushing it into the RO housing
inlet. Make sure the tubing is fully
engaged in the tting.
Figure 13. RO Cartridge
NOTE: Failure to fully engage the
tubing could result in leaks and
ooding.
10. Turn on the feed water and plug the
system power cord into the outlet.
Air and water should ow out of the
brine (drain) tubing and permeate
tubing.
11. Observe the system for leaks,
especially at the newly replaced
cartridge.
12. The system should be ushed as
described in the installation section
under RINSING THE RO SYSTEM.
13. When ushing is complete, open the
tank valve.
14. Record the next change date of the
RO Cartridge.
UV System (Option)
Maintenance
The UV system requires periodic
maintenance in order to function properly.
WARNING: The UV light given o󰀨 by
the UV bulb can cause serious
burns to unprotected eyes
and skin. Do NOT perform any
maintenance tasks with the bulb
plugged in and powered on.
Pay attention to the following guidelines
when working with the UV light:
yNever look directly at an
illuminated UV lamp
yAlways unplug the UV unit before
performing any work on the UV
bulb or disinfection system
yNever operate the UV bulb
outside of the UV housing
WARNING
Do not pour sanitizer into the system
inlet! The RO membrane can be
destroyed if exposed to sanitizer. Only
the downstream plumbing from the
system should be sanitized.

®
P/N 1011596 Rev. A 05/21 15
Replacing the Carbon Cartridge
NOTE: Always install a new Carbon
cartridge after replacing the RO
Cartridge.
1. Turn o󰀨 the water to the system by
closing the feed water valve.
2. Close the tank valve.
3. Open a valve on the line to the
store, to depressurize the system.
4. Unscrew the bowl and remove the
old carbon cartridge.
NOTE: Water may drain from the
system and cartridges as they
are removed.
5. Unwrap the new carbon cartridge.
Check to make sure the at gaskets
are on both ends of the cartridge.
NOTE: Both gaskets must be in place
on the cartridge or the system
will not work properly.
6. Drop the new carbon cartridge into
the bowl and screw the bowl in
place.
7. Turn on the feed water. Air and
water should ow out of the Brine
and the Product tubing.
8. Observe the system for leaks,
especially at newly replaced
cartridges.
9. The system should be ushed as
described in the installation section
under RINSING THE RO SYSTEM.
10. When ushing is complete, open the
tank valve.
11. Record the date the cartridges
where changed and the next
change date.
Replacing the Sediment Prelter
Cartridge
NOTE: Always install a new Sediment
Prelter Cartridge when
replacing the Carbon cartridge.
1. Turn o󰀨 the water to the system by
closing the feed water valve.
2. Close the tank valve.
3. Open a valve on the line to the
store, to depressurize the system.
4. Unscrew the bowl and remove the
old sediment cartridge.
NOTE: Water may drain from the
system and cartridge as it is
removed.
5. Unwrap the new sediment cartridge
and drop it into the bowl. Screw the
bowl in place.
6. Turn on the feed water. Air and
water should ow out of the Brine
and the Product tubing.
7. Observe the system for leaks,
especially at the newly replaced
cartridge.
8. The system should be ushed as
described in the installation section
under RINSING THE RO SYSTEM.
9. When ushing is complete, open the
tank valve.
10. Record the date the cartridge was
changed and the next change date.
Sanitization
The downstream plumbing should
be sanitized every six months. When
necessary, follow the SANITIZING THE
PLUMBING procedure in the Installation
section of this manual.
Gasket on
both ends
Figure 14. Sediment Prelter
Figure 15. Carbon Cartridge

®
P/N 1011596 Rev. A 05/21
16
Initial Performance Verication
After initial ush, a TDS (Total Dissolved
Solids) measurement should be taken
and recorded. This data can be used to
compare to factory test data and future
system data. Some deviations may occur
due to di󰀨erences in feed water TDS and
temperature
Total Dissolved Solids (TDS) Rejection
Test
Use the TDS meter to measure the TDS
in both the feed water and product water.
Calculate the percent rejection using the
formula below. Rejection should be 85% or
better:
100 x (Feed TDS - Product TDS) /
(Feed TDS) = % Rejection
Example:
Feed TDS = 500 ppm
Product TDS = 25 ppm
100 x (500 - 25) / (500) = 95% Rejection
RO Recovery Calculation
Using a stop watch and graduated cylinder
(or other calibrated volume), measure the
product water ow rate and the drain ow
rate. The product water ow rate should
be the ow coming directly from the RO
System, not from the tank. Close the TDS
blending valve and the tank valve to make
this measurement. Calculate the percent
recovery using the formula below:
100 x (Product Flow Rate) / (Product +
Drain) = % Recovery
Example:
Product Flow Rate = 25 ml/min
Drain Flow Rate = 200 ml/min
100 x (25) / (25 + 200 ) = 11.1% Recovery
Recovery is dependent on feed water
temperature and pressure. Measure and
record the feed water temperature and
pressure whenever measuring the percent
recovery.
Semi-Annual Tasks
Check Tank Air Pre-Charge
The tank air charge should be checked
every six months:
Tools and supplies required:
Air Pressure Gauge, 5-40 psi range (0.3
- 2.7 bar) with tire valve (Schrader Valve)
connection.
Source of compressed air (manual bicycle
tire pump or air compressor).
CAUTION
Air pre-charge should be checked and
adjusted under zero system pressure.
The system must be depressurized
before checking the tank pre-Charge.
Do NOT adjust the tank air pre-charge
with the system under pressure.
CAUTION
Be careful when adding air to the tank. Do
NOT add too much air pressure to the tank.
1. Depressurize the system by closing
the Inlet Valve and opening the tank
valve. Make sure the tank is fully
drained.
2. Unscrew the protective cap from the
air valve on the tank.
3. Use the pressure gauge to check
the tank pre-charge for pressure.
NOTE: If any water comes out of the
air valve, the tank bladder has
ruptured and the tank needs to
be replaced.
4. Check the tank manufacturer for the
recommended air pressure charge.
If there is no recommendation,
most RO system tanks have an air
pressure charge of 5-8 psi.
yTo add pressure to the tank, use
a manual bicycle tire pump or
other source of compressed air.
yTo release pressure from
the tank, press the center
pin on the air inlet valve.
5. Once the tank air charge is set,
replace the protective cap on the air
valve.
6. Pressurize the system by opening
the Inlet and Tank valves.
Annual Tasks
Change Sediment, Carbon, and
RO Cartridges
The sediment and carbon cartridges should be
changed as indicated on the controller.
Depending on performance changes, the RO
cartridge may need to be changed as indicated
on the controller.
Follow the change procedures for each as
shown earlier in this Maintenance section.

®
P/N 1011596 Rev. A 05/21 17
Problem Possible Cause Corrective Action
No water comes out of the
lter system.
Inlet/Outlet valves closed. Open the inlet/Outlet valves.
System depressurized. Pressurize system.
Pump not working. Replace pump.
Inlet Strainer (if installed) is plugged. Clean or replace Inlet Strainer.
RO Cartridge is plugged. Replace RO Cartridge.
Prelter Cartridges are plugged. Replace prelter cartridges.
Low water ow comes out of
the lter system.
See Above. See Above.
The inlet water pressure is too low. Boost the inlet water pressure.
Tank air charge low. Add air to tank.
Tank diaphragm ruptured, waterlogged. Replace tank.
Water tastes bad.
Carbon cartridges need replacing. Replace carbon cartridges.
Storage/shipping solution not completely rinsed out of
the system.
Rinse the system for a longer period of time; replace
carbon cartridges.
Biological growth in pipes. Sanitize plumbing.
Water conditions changed. Consider installing additional ltration.
Broken membrane in RO Cartridge. Replace RO Cartridge.
Flush runs continuously. Tank pressure switch stuck open. Replace tank pressure switch.
Water splashes at drain during
ush.
Drain line not positioned properly. Reposition the end of the drain line.
Drain not capable of handling ow rate. Clean drain; nd alternate drain.
Water leaks at ends of the
Filter cartridge after changing
cartridge.
Fitting O-ring not lubricated or cut. Replace tting.
Cartridge not seated properly in tting. Re-install cartridge in ttings.
Water leaks from system
tting or connection Fitting broken or loose. Tighten or replace the tting.
Troubleshooting

®
P/N 1011596 Rev. A 05/21
18
Replacement Parts
Exploded View
73
32
32
1
43
51
72
62
21
21
13
24
19 24
13
21
41
41
61
4
23
56
21 57
56
37
18
13
36
13
37
18
46
45
53
53
35
40
54 16
22
48
52
14 16
13
17
27
25
16
13
2
49
63 6
2031
50
29
30
15
1626
55
60
21 59
19 20
13
25
40
54
55
38
38
ITEM NO. PART NUMBER DESCRIPTION QTY.
1 0510392 BRACKET, CTRL MOUNT 1
20510393
BRACKET, SV MOUNT 1
30510394
BRACKET, RO CLAMP 2
40510395
BRACKET, BACK 1
50510396
BRACKET, COVER 1
60701123
ADAPTER, DC 24V 5.0A 1
70701134
WIRE SET, RO CONTROLLER, 12PIN 1
81001081
LABEL, INLET 1
91001082
LABEL, PERMEATE 1
10 1002749 LABEL, ANTUNES LOGO 2.86" X 9.97" 1
11 2020147 3/8" TUBING; WHITE[85mm] 14
12 2020150
1/4" TUBING; WHITE[100mm] 9
13 2080181
FITTING, POM, ELB, 3/8" TUBE X 3/8"
STEM
7
14 2080217
FITTING, STR, 3/8" X 3/8" TUBE, SHEET
MOUNTING
1
15 2080218
FITTING,STR, 1/4" X 1/4" TUBE, SHEET
MOUNTING
2
16 2080219 FITTING,ELB, 3/8" X 3/8" TUBE 4
17 2080220
FITTING,T-ADAPTOR, 1/4" TUBE X 3/8"
STEM
1
18 2080221 FITTING, ELB, 1/2" NPT X 3/8" TUBE 2
19 2080222
FITTING, T-ADAPTOR, 1/4" TUBE X 3/8"
TUBE 2
20 2080223 FITTING, ELB, 1/4" TUBE X 1/4" STEM 2
21 2080224 FITTING, STR, 3/8"NPT X 3/8" TUBE 5
22 2080225
FITTING,T-ADAPTOR, 3/8" TUBE X 3/8"
STEM
1
23 2080226 FITTING, ELB, 3/8"NPT X 3/8" TUBE 1
24 2080227 3/8" CHECK VALVE 2
25 2080228 FITTING, SIDE T-STEM, 1/4" 2
26 2080229 FITTING, Y-ADAPTOR, 1/4" TUBE 1
27 2080230 FITTING, ELB, 1/4" X 1/4" TUBE 1
28 2080231 FITTING, STR, 1/4"FNPT X 1/4" TUBE 1
29 2080232 ADJT. FLOW RESTRICTOR, 1/4" TUBE 1
30 2080233 TEE, 1/4" TUBE X 1/4'' STEM 1
31 2080235 FITTING, STR, 1/4" TUBE X 3/8" MNPT 1
32 2100212 HANDLE, POCKET PULL, SNAP-IN 2
33 2140144 TAPE, PIPE THREAD 5
34 2140163
THREAD SEALING COMPOUND,
(RECTORSEAL)
4
35 2170201 PRESSURE GAUGE, PANEL MOUNTED 1
36 2170212
BLEND VALVE, 3/8'' TUBE, PANEL
MOUNTED
1
37 2180495 BOWL 2
38 2180495 HEAD 2
39 2180495 ORING 2
40 2180772
MOUNTING CLIP, RO HSG,
400/600GPD
2
41 2180779
HOUSING, BOWL AND HEAD, RO,
400/600 GPD
1
42 2180823 GLUE BOX, RO CONTROLLER 1
43 2180824 SUPPORT FRAME, RO CONTROLLER 1
44 2180825 PLASTIC CLIP, M4 x 6.3mm 4
45 2190251 ADAPTOR, TUBE TO 1/2 NPT 1
46 2190252 ADAPTOR, 1/2 STEM 1
47 3060128 STUD, SELF CLINCH, #6-32 X 5/8" 2
48 3060130
NUT,HEX"KEPS" #06-32 STEEL; ZINC
PLATED
2
49 3060220 SCREW, M4 X 6MM, SS304 2
50 3080157 SCREW, #8-32 X 3/8" LG PHTRSHD 4
51 3080194
SCREW #8-32 X 3/4, PAN HD. PHIL.
ST. STL
4
52 3080223 WASHER, FLAT #8 2
53 3080347 SCREW, 1/16'' - 16 X 1/2'' LG 10
54 3080359
8-32 x .50 LG PH S.S. EPOXY-LOCK
PATCH
2
55 3080370
SCREW, THUMB #8-32 X 5/8
KNURLED HEAD
2
56 3100146 NUT, HEX "KEPS" #10-32 4
57 3100157 WASHER, FLAT #10 4
58 3100203 STUD, PEM #10-32 X 7/8" 4
59 4010278
LOW PRESSURE SWITCH, RO, 400/600
GPD
1
60 4010279
HIGH PRESSURE SWITCH, RO,
400/600 GPD
1
61 4040234 PUMP, DIAP, 2.5L/MIN, 3/8 NPTF, 24V 1
62 4040236 VALVE, SOL NC, 3/8'' NPT, SANLIXIN 1
63 4040237 VALVE, SOL NC, 1/4'' TUBE, SANLIXIN 1
64 4060377 CABLE TIE MOUNT W/ ADHESIVE 3
65
4060399 CONTACT
BLOCK
1
66
4060399 HOUSING
GROMMET
1
67 4060399 HOUSING NUT 1
68
4060399 HOUSING
SCREW
1
69
4060399 HOUSING
SHELL
1
70 4060399 INSULATOR 1
71 4060399 NUT WASHER 1
72 4070439 RO CONTROLLER, AQ-RO, SUZHOU 1
73 5040238 GASKET, RAW MATERIAL 5
74 TER62-0003 TERM-RECEPT 8
75 TER62-0004
TERM-RECEPT 3/16'' FASTON .135''
MAX
4
76 ter62-0002 TERM-TAB 1/4'' FASTON .135'' MAX 6

®
P/N 1011596 Rev. A 05/21 19
Replacement Parts
Parts List
(See Exploded Views for more information)
NOTE
Use only genuine Antunes replacement parts in this unit.
Use of parts other than those supplied by the manufacturer
will void the warranty.
ITEM
NO.
PART # DESCRIPTION QTY.
1 0510392 BRACKET, CTRL MOUNT 1
2 0510393 BRACKET, SV MOUNT 1
3 0510394 BRACKET, RO CLAMP 2
4 0510395 BRACKET, BACK 1
5 0510396 BRACKET, COVER 1
6 0701123 ADAPTER, DC 24V 5.0A 1
7 0701134 WIRE SET, RO CONTROLLER, 12PIN 1
8 1001081 LABEL, INLET 1
9 1001082 LABEL, PERMEATE 1
10 1002749 LABEL, ANTUNES LOGO 2.86” X 9.97” 1
11 2020147 3/8”TUBING; WHITE[85mm] 14
12 2020150 1/4”TUBING; WHITE[100mm] 9
13 2080181 FITTING, POM, ELB, 3/8”TUBE X 3/8” 7
14 2080217 FITTING, STR, 3/8” X 3/8”TUBE 1
15 2080218 FITTING,STR, 1/4” X 1/4”TUBE 2
16 2080219 FITTING,ELB, 3/8” X 3/8”TUBE 4
17 2080220 FITTING,T-ADAPTOR, 1/4”TUBE X 3/8” 1
18 2080221 FITTING, ELB, 1/2” NPT X 3/8” TUBE 2
19 2080222 FITTING, T-ADAPTOR, 1/4”TUBE X 3/8” 2
20 2080223 FITTING, ELB, 1/4”TUBE X 1/4” STEM 2
21 2080224 FITTING, STR, 3/8”NPT X 3/8”TUBE 5
22 2080225 FITTING,T-ADAPTOR, 3/8”TUBE X 3/8” 1
23 2080226 FITTING, ELB, 3/8”NPT X 3/8”TUBE 1
24 2080227 3/8” CHECK VALVE 2
25 2080228 FITTING, SIDE T-STEM, 1/4” 2
26 2080229 FITTING, Y-ADAPTOR, 1/4” TUBE 1
27 2080230 FITTING, ELB, 1/4” X 1/4”TUBE 1
28 2080231 FITTING, STR, 1/4”FNPT X 1/4”TUBE 1
29 2080232 ADJT. FLOW RESTRICTOR, 1/4”TUBE 1
30 2080233 TEE, 1/4”TUBE X 1/4’’ STEM 1
31 2080235 FITTING, STR, 1/4”TUBE X 3/8” MNPT 1
32 2100212 HANDLE, POCKET PULL, SNAP-IN 2
33 2140144 TAPE, PIPE THREAD 5
34 2140163 THREAD SEALING COMPOUND 4
35 2170201 PRESSURE GAUGE, PANEL MOUNTED 1
36 2170212 BLEND VALVE, 3/8’’TUBE, PANEL
MOUNTED
1
37 2180495 FILTER BOWL 2
38 2180495 FILTER HEAD 2
39 2180495 FILTER O-RING 2
40 2180772 MOUNTING CLIP, RO HSG 2
41 2180779 HOUSING, BOWL AND HEAD, RO 1
42 2180823 GLUE BOX, RO CONTROLLER 1
43 2180824 SUPPORT FRAME, RO CONTROLLER 1
44 2180825 PLASTIC CLIP, M4 x 6.3mm 4
45 2190251 ADAPTOR, TUBE TO 1/2 NPT 1
46 2190252 ADAPTOR, 1/2 STEM 1
47 3060128 STUD, SELF CLINCH, #6-32 X 5/8” 2
48 3060130 NUT,HEX”KEPS” #06-32 STEEL; ZINC
PLATED
2
49 3060220 SCREW, M4 X 6MM, SS304 2
50 3080157 SCREW, #8-32 X 3/8” LG PHTRSHD 4
51 3080194 SCREW #8-32 X 3/4, PAN HD. PHIL.
ST. STL
4
52 3080223 WASHER, FLAT #8 2
53 3080347 SCREW, 1/16’’ - 16 X 1/2’’ LG 10
54 3080359 8-32 x .50 LG PH S.S. EPOXY-LOCK
PATCH
2
55 3080370 SCREW, THUMB #8-32 X 5/8
KNURLED HEAD
2
56 3100146 NUT, HEX “KEPS” #10-32 4
57 3100157 WASHER, FLAT #10 4
58 3100203 STUD, PEM #10-32 X 7/8” 4
59 4010278 LOW PRESSURE SWITCH, RO 1
60 4010279 HIGH PRESSURE SWITCH, RO 1
61 0014516 PUMP ASSEMBLY 2.5 L
9710141& 9710143 ONLY
1
0014517 PUMP ASSEMBLY 3.2 L
9710142 ONLY
1
62 4040236 VALVE, SOL NC, 3/8’’ NPT, SANLIXIN 1
63 4040237 VALVE, SOL NC, 1/4’’TUBE, SANLIXIN 1
64 4060377 CABLE TIE MOUNT W/ ADHESIVE 3
65 4060399 CONTACT BLOCK 1
66 4060399 HOUSING GROMMET 1
67 4060399 HOUSING NUT 1
68 4060399 HOUSING SCREW 1
69 4060399 HOUSING SHELL 1
70 4060399 HOUSING INSULATOR 1
71 4060399 NUT WASHER 1
72 4070439 RO CONTROLLER, AQ-RO, SUZHOU 1
73 5040238 GASKET, RAW MATERIAL 5
74 0014672 UV SYSTEM
9710141 & 9710142 ONLY
1
75 7100040 Sediment Prelter Cartridge (Single
Pack)
1
76 7000834 Carbon Prelter Cartridge (Single Pack) 1
77 7002303 Reverse Osmosis Cartridge (Single
Pack) 9710141 & 9710143 ONLY
1
7002304 Reverse Osmosis Cartridge (Single
Pack) 9710142 ONLY
1

®
P/N 1011596 Rev. A 05/21
20
Date
Feed
Temperature
(°F)
Feed
Pressure
(psig)
Product
Flowrate
(ml/min)
Drain
Flowrate
(ml/min)
Percent
Recovery
(%)
Product
TDS
(ppm)
Feed
TDS
(ppm)
Percent
Rejection
(%)
Date Date Date
Changed
Sediment
Next Sediment
Change
Changed
Carbon
Next Carbon
Change
Changed
RO Next RO Change