Ecosoft Robust User manual

ECOSOFT Robust
Reverse osmosis system
Installation and operation manual

Instruction manual for ECOSOFT Robust reverse osmosis system | 2
This manual is the intellectual property of, and copyrighted by ECOSOFT S C LLC. Copying and reprinting is forbidden. © 2015

Instruction manual for ECOSOFT Robust reverse osmosis system | 3
This manual is the intellectual property of, and copyrighted by ECOSOFT S C LLC. Copying and reprinting is forbidden. © 2015
CONTENTS
1 Application 4
2 Specifications and components 7
2.1 Technical specifications 7
2.2 Feed water requirements 7
2.3 System components 8
3 Installation diagrams 9
3.1 ECOSOFT Robust base model 9
3.2 ECOSOFT Robust with pressure tank 9
3.3 ECOSOFT Robust with pressure tank and ultraviolet unit 10
4 Installation steps 10
4.1 Installation conditions and package completeness check 10
4.2 Installation 11
Post-installation 14
6 Operation 1
6.1 Description and average lifespan of system components 16
6.2 Filter replacement 16
6.3 Membrane replacement 17
7 Sanitization 18
7.1 ressure tank sanitization 18
8 Troubleshooting 20
9 Maintenance record 22
10 Health and environment safety information 24
11 urchasing 24
12 Transportation and storage 24
13 Warranty 24
14 Authorized services in your area 27

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1. APPLICATION
Reverse osmosis process is one of the most advanced technologies of water
purification. Reverse osmosis filter uses a special semipermeable membrane similar in
its structure and properties to the membrane of living cell. It can be conceived of as
having tiny pores that are 200 times finer than virus particle and 4000 times finer than
most bacteria. The principle of reverse osmotic water purification is modelled after
living cell’s natural water cycle. It allows to purify drinking water from all harmful
impurities, including nitrates and viruses (see Figure 1 below). Only molecules of
certain size can penetrate cellular membrane.
Ecosoft Robust is a high recovery direct flow operation capable multistage reverse
osmosis system. The system can be equipped with a pressure tank for increasing
purified water flow rate, and multistage design allows to obtain a high recovery of up
to 50%.
The system is tapped in water mains using feed adapter 2 and feed valve 3. Red
tube is run from feed valve to the inlet port in system’s port rack (labeled). The port
rack also includes connection ports for the drain, pressure tank 6 (if used), and purified
water faucet 1 or purified water pipe.
Feed water first undergoes prefiltration in sediment prefilter where it is stripped of
suspended particles (rust, sand, hemp strands etc), and carbon prefilter where it is
purified from organic color and chlorine compounds. ressure gauge no. 1 on front
panel displays water pressure after the two prefilters.
After the prefilters, water goes in pressure booster pump, which sends it in the
membrane array, consisting of three membrane housings arranged in two stages.
Feed water
stream
Water molecules
Impurities
Concentrate
effluent
urified water
Membrane
Figure 1. Reverse osmosis process illustration

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The pressure booster pump feeds the water to the first stage of the reverse
osmosis membrane array with two parallel 100 G D membrane modules. ermeate
from both module goes to the permeate collector, and concentrate goes to the second
stage with one 100 G D membrane module. Second stage permeate goes to the
permeate collector, and concentrate is discarded to drain via concentrate flow
restrictor and drain port in port rack. ressure gauge no. 2 shows pressure between
the two stage of membrane array. ermeate goes to purified water line or pressure
tank if installed, passing through the carbon postfilter. urified water line may go to
purified water faucet or be connected with some other consumer appliance.
High pressure switch installed before the postfilter reads pressure in permeate line
and starts the reverse osmosis system when it drops (due to taking of some water
from the pressure tank or opening purified water faucet). When the system switches
on, entry solenoid valve is opened and booster pump is powered up, which allows feed
water into the system. The water goes through 1st and 2nd prefilters, then is pressure-
fed by the booster pump to membrane array, where permeate is produced and sent to
permeate line to make up for the lost pressure in tank/pipe. When purified water
stops being drawn from the system, pressure starts to build up and closes high
pressure switch switching off the system.
Robust RO system has low feed water pressure protection implemented with a low
pressure switch, which prevents the pump and solenoid from operating if feed
Figure 2. Robust reverse osmosis system

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pressure is less than 0,4 bar. Two pressure gauges on the front panel show operating
pressure in the system, which allows to diagnose potential and occurring problems.
Direct flow capacity of Robust system is 55-60 l/h. If the required peak flow is
greater than that, the system can be equipped with a pressure tank, which can be
connected with the system via pressure tank port in the port rack. ressure tank
equipped system can produce up to 80-120 l/h purified water flow. The duration of
peak flow capacity will depend on pressure tank size.
Depending on system make (model), the system may be equipped with a mineral
filter, UV disinfection unit or another type of postfilter.

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2. SPECIFICATIONS AND COMPONENTS
2.1 TECHNICAL SPECIFICATIONS
Parameter
Value
1 urified water flow rate
@ 25 °C, 1000 mg/l total dissolved solids feed water
55…60 l/h
2 Feed water flow rate 110…130 l/h
3 Concentrate flow rate 55…65 l/h
4 Inlet water pressure 2,0…5,0 bar*
5 Operating pressure in membrane array 5,0…7,0 bar
6 ressure in tank bladder (when used with pressure tank) 0,4…0,6 bar
7 Feed water temperature +4… +30 °C**
8 Ambient air temperature +5…+40 °C**
9 Connection to water mains ½″ thread
10 Overall dimensions, H × W × D (base model) 420×220×425
mm
11 Weight (base model) 6 kg
12 Electrical rating 230 V, 50 Hz
13 ower consumption, max. 80 W
14 Ingress protection rating I 54
* If pressure of water in your system does not meet requirement, install a pressure booster pump to raise it.
If water pressure exceeds the upper limit, install a pressure regulator before the Robust system.
** Using the Robust system with feed water temperature between +20 and +30 °С produces a lower
rejection rate and higher flow rate, which yields higher TDS of purified water. Using the system with feed
water above +30 °С is advised against.
2.2 FEED WATER REQUIREMENTS*
Parameter
Value
**
1
pH
6,5…
8,5
2 Total dissolved solids (TDS) < 1500 mg/l
3 Hardness < 30 °dH (500
mg
CaCO
/l)
4 Residual chlorine < 0,5 mg/l
5 Iron < 0,3 mg/l
6 Manganese < 0,1 mg/l
7 Chemical oxygen demand < 5 mg O
2
/l
8 Total microbial count < 100 CFU/ml
9 E. coli none
* If feed water quality does not meet specified requirements, membrane and filter service life may decrease.
** If aiming to purify raw water (well water/ground water etc), it is recommended to carry out detailed
water analysis. If any constituents exceed the above limitations, it is advisable to install a special filter
upstream of your reverse osmosis system. Consult professional water treatment specialist for proper
selection of an appropriate filter for your water.

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2 . 3 SYSTEM COMPONENTS
1 Filter rack with booster
pump
2 refilters and postfilter 3 Reverse osmosis
membranes
4 Feed adapter
Feed valve
6 Drain saddle
7 Colored tubing
8 urified water faucet
9 Filter bowl wrenches
O TIONS
10 Mineralizing filter 11 Ultraviolet treatment
unit
12 ressure tank
The manufacturer reserves the right to amend design or components of the product, if such amendment does
not result in deterioration of its quality and performance.

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3. INSTALLATION DIAGRAMS
3.1. ECOSOFT Robust base model
3.2. ECOSOFT Robust with pressure tank
Connections.
Purified water. Run blue tube from
purified water port to purified water
faucet.
Drain. Run black tube from drain
port to drain saddle installed on
drain pipe.
Pressure tank. Run white tube from
pressure tank port to the pressure
tank.
Inlet. Run red tube from feed water
outlet to the inlet port in port rack.
urified
water
Drain
Tank
Inlet

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3.3. ECOSOFT Robust with pressure tank and ultraviolet unit
The manufacturer reserves the right to amend design or components of the product, if such amendment does
not result in deterioration of its quality and performance.
4. INSTALLATION STEPS
Carefully read this manual before installing the reverse osmosis system.
4 . 1 . INSTALLATION CONDITIONS AND PACKAGE COMPLETENESS CHECK
1) Check that all components of the reverse osmosis system (see p. 2.3) are inside the
package. Do not open plastic bag before you make sure it contains all parts. Missing
part claims will not be accepted if the package is broken.
2) Ensure that your utilities meet this product’s requirements:
— check other parameters of the technical specification (p. 2.1);
Inlet water pressure* Pressure in tank bladder Influent water temperature
Test water pressure at the
tapping point. It must comply
with specification in p. 2.1.
If using pressure tank, test
pressure in the bladder. It must
comply with specification in
p. 2.1.
Test water temperature and
verify compliance with
specification in p. 2.1.
* If any of the parameters does not meet requirement, consult p. 2.1 for possible corrective action.

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— check that feed water meets requirements in p. 2.2**.
** If the water quality does not meet requirements, refer to a water treatment
specialist company for assistance selecting the appropriate product for normalizing
the offending constituents.
3) Before proceeding with the installation, ensure there is enough space for the
assembled system. If using pressure tank, provide room for it as well. In case of
shortage of space, pressure tank can be removed to the distance of connecting tube
length.
4) Install the reverse osmosis system in accordance with below procedure.
4.2. INSTALLATION
Caution! This product has been factory tested for leaks, and may contain residual
moisture.
Before installation of tubing, filters, and membranes, wash your hands with
antibacterial soap.
Ensure that the installation place is shielded from direct sunlight and removed from
heating appliances.
1 Remove the reverse osmosis system from and the box and check that all parts are
inside the bag. Do not open the bag before verifying. You will not be able to claim
missing parts if the bag is opened.
2 Shut off water supply in place of installation and open a water tap for 1 minute to
relieve pressure in the system. Then close the tap.
3 Tap feed adapter 4 into the cold water plumbing.
Install feed valve into the feed adapter. To avoid
leaks use TFE seal tape.
The adapter size fits the most common ½″ pipe. If
your pipe is another size, install an appropriate
fitting piece.
4 Unscrew compression nut from the feed valve tube connection. Slip red tube
through the nut and connect it to the feed valve tube connection, then screw

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compression nut back on till snug. Connect the
other end of red tube to the inlet port of the RO
system’s port rack.
ush tube all the way to the tube stop when
making push-fit connections.
5 Drain saddle 6 fits most standard drain pipe.
Install the drain saddle on drain pipe as follows. Bore
5 mm hole in the drain pipe, apply rubber gasket with
sticky base (included in the package). Install drain saddle
on top of the gasket so that push-fit fitting in the saddle
is located precisely above the hole in drain pipe. Tighten
nuts on drain saddle fasteners with a wrench. Insert
black tube in the push-fit fitting in drain saddle. Connect
the other end of black tube with drain port of the RO system’s push-fit port rack.
6* ut a few turns of TFE tape on tank nipple thread.
Screw tank valve on the tank nipple. Turn the valve fully
off.
NOTE! Test air pressure in the empty tank bladder
(remove cap on the lateral bottom to access valve
stem). Reading should be as specified in p. 2.1. If
necessary, use air pump with to inflate the bladder. If
pressure is too high already, push on the valve stem’s
core to relieve it.
7 Install the faucet
7.1 To install purified water faucet 8 bore a
12,5 mm diameter hole in desired
location on sink or countertop.
Caution! Metal shavings can damage
your sink, remove them carefully once
you have finished drilling. If the
mounting surface is stone or ceramic,
use a carbide drill bit
7.2 Mount the faucet over the hole on top
of small rubber washer, chrome plated
base, and large rubber washer. Fix the
faucet firmly with plastic washer, lock
washer, and nut put on the faucet
shank underneath sink surface.
7.3 ut compression nut on free end of

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7.4 blue tube, then put on ferrule and put
insert inside the tube.
ush the end of blue tube inside the shank bottom a few centimeter deep, seat
the ferrule against shank bottom and screw compression nut snugly on shank
thread. The faucet should now be firmly fixed on top of sink, and blue tube tightly
seated in compression fitting at the bottom of faucet shank.
8 Remove 1
st
and 2
nd
prefilter housings (left to right), put the polypropylene filter in
the first bowl, carbon filter in the second.
9 Install the housings back on the system frame. Hand tighten only.
10 repare a suitable water container. Remove feed water tubes from the two first
stage membrane housings and place the free ends in the prepared container.
Open main shutoff valve and the system’s feed valve to start rinsing prefilters.
Collect running water in the container and discard when full. Repeat until there
are no carbon fines in rinsewater. Install the free tube ends back in push-fit
fittings in membrane housings and lock with locking clips.
11 Install carbon postfilter in 3
rd
filter housing from the left.
12 Install three membranes in membrane
housings.
Caution! When installing reverse osmotic
membrane, do not take it out of the bag.
Cut the bag at the opposite end to
membrane’s brine seal, push the
membrane inside membrane housing. Do
not touch membrane surface at any time.
13 Open feed valve and
purified water faucet
for 30 minutes to rinse
membranes and other
parts of the system. Do
not open tank valve at
this time. Close the
purified water faucet and check all connections for leaks.
Caution! Inspect the system for leaks every day for the first week after
installation. Continue to check periodically onward. When leaving for an extended
while, shut off main valve to remove water supply to the system.
14
*
Open tank valve and let the system fill it. The system will switch off when tank is
full. Open purified water faucet and discard the first tankful of purified water.
When the tank is drained empty, close the purified water faucet and let the
system refill the tank. The water can be used now.
* Skip steps 6 and 14 if installing a tankless system.

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. POST-INSTALLATION
1. Use calibrated TDS meter to test your tap water and purified water total dissolved
solids. Write down the readings in maintenance log.
2. Verify proper functioning of feed water solenoid. The system must switch off and
stop discharging concentrate when pressure tank is full* and purified water faucet is
closed.
3. Inspect the system carefully for leaks.
4. Advise the system’s owner how to operate and maintain the system, refer to this
manual.
5. Make a record of system installation in maintenance log.
6*. When using a pressure tank, note that the tank is full when high pressure switch is
activated, pump switches off, and concentrate stops running to drain. The time to fill
the tank depends on water pressure at the tapping point.
* Skip if using a tankless system.

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6 . OPERATION
This product should be used for purification of only cold water. If purified water
flow rate has decreased or tank is taking longer than normal to refill, the likelihood is
that prefilters are soiled and need to be replaced as soon as possible. Delayed
replacement of prefilters can result in damage or failure of the membranes. In order to
avoid this, it is recommended to replace prefilters at least once in three months of
continuous use.
If purified water flow rate drops significantly and is not caused by prefilter wear or
abnormal operating conditions, the array of membranes has to be replaced. For best
purified water quality, replace membranes at least once a year.
If the system is to be out of operation for two weeks or longer, sanitize the system as
described in paragraph 7. When discontinuing use of the system, it is recommended to
shut off the water supply.
Recommendations on the front panel plate indicate what actions should be
undertaken if abnormal pressure is read on pressure gauges.
Pressure after prefilters (1
st
pressure gauge). If pressure after prefilters is less than
1 bar, this may indicate low mains pressure or clogged prefilters. Test pressure at the feed
adapter site. If it exceeds reading on the pressure gauge significantly, replace prefilters.
Otherwise, low feed water pressure is at fault and has to be sorted out. If the 1
st
pressure
gauge displays over 5 bar after the system switches on, power down the system
immediately, disconnect water supply, and install a pressure regulator upstream of the
system. Then, continue setting up the system. Maximum recommended feed water
pressure is 3,5 bar.
Pressure in the membrane array (2
nd
pressure gauge). If operating pressure in the
membrane array is lower than 4 bar or amounts to feed water pressure, this can be
caused by any of the following:
Figure 2. Robust system front panel
Pressure after
cartridges
Operating
pressure
Change cartridges
Contact after sale service
Contact after sale service
Install a pressure
regulator
lower than 1 bar
lower than 4 bar
higher than bar higher than 7 bar

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—motor power supply fault (possibly due to broken/torn pump motor cord)
—air trapped inside pump’s chamber
—jamming of the pump with solids such as carbon fines (if carbon filter was not
properly washed before use)
Generally, if operating pressure reading on the 2
nd
pressure gauge falls below its
normal range, contact your dealer’s service. If pressure on 2
nd
pressure gauge is over
7 bar, this could be due to pressure regulator failure or the RO system’s high pressure
switch fault. Contact your dealer’s service for help.
6.1. DESCRIPTION AND AVERAGE LIFESPAN OF SYSTEM COMPONENTS*
Filtration stage Filter type Service life
1 refilters. Service life depends on
quality of feed water and
intensity of usage
8 000 l* but not less than once in 3
months.
2
3 Reverse osmosis membranes 24 000 l* but not less than once a
year
4 Carbon block postfilter 8 000 l* but not less than once in 3
months.
* service life of filters and membranes depends on quality of feed water.
6.2. FILTER REPLACEMENT
1 Open purified water faucet 8 while the system is plugged in, close feed water
valve , close pressure tank 12 valve if installed.
2 Wash your hands with antibacterial soap thoroughly.
3 After water has stopped running from purified water faucet, unplug the RO system
from the mains and screw off the three filter housings. Take care as the bowls will
be full of water.
4 Remove spent filters.
5 Wash the bowls thoroughly with non-aromatic soap, then rinse with water.
6 Install new filters in bowls as follows: sediment prefilter in the 1
st
housing, carbon
prefilter in the 2
nd
housing, postfilter in the 3
rd
housing (going left to right).
7 Unplug feed water tubes from the two first stage membrane housings and put
them in a container for collecting rinsewater. lug the cord in mains and open
feed water valve . Let enough water through the filters to flush out the carbon
fines and dust. When running water becomes free of carbon particles, close feed
water valve. lug the tubes back in the inlets in membrane housings. Secure
connections with locking clips.
8 Open feed valve and plug the system in the mains. Let the RO system run for some
time with purified water faucet open to wash off carbon fines from carbon
postfilter. Close purified water faucet when water appears clear and free of
particulate impurities.

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6.3 MEMBRANE REPLACEMENT
(Performed by water filter service specialist)
1 Shut off feed water valve , close pressure tank valve if used.
2 Open purified water faucet 8 to relieve pressure in the system. Remove power
from the system.
3 Unplug white tube from each membrane housing cap. Screw off the housing caps.
Extract used membranes 3 from membrane housings and take note of their
orientation inside the housings.
4 Take new membranes and grease their brine seals and membrane housing cap O-
ring seals.
Caution! Only use food grade glycerol or certified RO membrane compatible
lubricant for greasing the seals to avoid damage.
5 Install new RO membranes in housings observing proper orientation of each.
Caution! Do not remove plastic bag when installing membrane. Make a cut in the
head end of bag and push the membrane out of the bag and into the housing. Do
not touch membrane surface with your hands.
6 Screw on membrane housing caps.
7 lug white tubes back in the housings.
8 Open feed valve . Restore power supply to the system.
9 Let the system run for 30 minutes to flush out membrane preservative. Then, close
purified water faucet and open pressure tank valve if used.

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7 . SANITIZATION
Sanitization of the reverse osmosis system is recommended after it has been in
operation for an extended period (over 6 months) or when the system is to be shut
down for 3 weeks or longer. It is also advisable to sanitize the system when replacing
filters. Sanitization is best performed with chlorine tablets.
1 Remove electrical power from the system. Shut off feed valve and close tank
valve (if pressure tank is used) after first draining all water from the tank.
2 Extract and dispose of spent prefilters and the postfilter (see filter replacement
procedure).
3 Extract the reverse osmosis membranes, put them in tight plastic bags and store in
a fridge with an ambient temperature of +2…+5 °С. Do not touch membrane when
removing, use pliers for holding it.
4 Screw back on 2
nd
and 3
rd
filter housings (middle and rightmost ones).
5 ut a chlorine tab in the first prefilter housing. Fill with water and screw it back on
filter head.
6 Let stand for 15 minutes, then open feed valve and purified water faucet, and plug
in the mains.
7 When water coming out of purified water faucet starts smelling like chlorine, close
purified water faucet. Open tank valve slightly and let the tank fill with water. Wait
until the system switches off automatically when the tank becomes full.
8 Let the system stand for 2-3 hours.
9 Open purified water faucet and let water out until chlorine smell disappears
completely. Then, close feed valve and remove power.
10 Install filters and membranes in their housings.
11 Open feed valve and restore power supply. Drain first 1-2 tankfuls of water if some
chlorine odor remains.
7.1 PRESSURE TANK SANITIZATION*
1 Remove electrical power from the system. Shut off feed valve .
2 Open purified water faucet 8 and let all water go out of the tank. Remove power.
3 Close tank valve.
4 Extract prefilters and the postfilter from the housings as when replacing.
5 Screw back on 2
nd
and 3
rd
filter housings (middle and rightmost ones).
6 Disconnect from permeate collector tee (on top of system frame) tube running to
pressure tank port in the port rack. Unplug tube from 2
nd
prefilter housing water
outlet, and connect the permeate collector tube instead.

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7 ut a chlorine tab in the first prefilter bowl. Fill to the top with water and screw
back on.
8 After 15 minutes, open pressure tank valve. Leave purified water faucet closed.
9 rovide power to the system, then open feed water valve for 5 minutes.
10 Close pressure tank valve and let stand for 1-2 hours.
11 Open purified water faucet and drain all chlorinated water from the tank by
opening purified water faucet.
Open feed water valve and flush the system until chlorine smell disappears.
Close feed water valve and remove power from the system.
Disconnect permeate collector tube from the 2
nd
filter housing outlet and
reconnect it back to the tee. Connect high pressure pump feed tube back to 2
nd
prefilter housing. Check that the original tubing is restored properly.
12 Install filters back in housings, then open feed water valve and provide power to
the system again.
13 Refill and drain a few tankfuls of water (until chlorine smell disappears
completely).
* Skip if your system is not equipped with a pressure tank

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8. TROUBLESHOOTING
roblem ossible cause Method of handling
Fitting leak Tube is not connected
tightly
Remove and reinstall the tube
properly.
Drain saddle leak Drain saddle is not
installed correctly
Reinstall drain saddle as described in
paragraph 4.2 of this manual.
Filter housing leak O-ring seal is missing
or misaligned
Check that the O-ring seal is correctly
seated in circular groove inside bowl.
Filter bowl is not
tightened
Hand tighten the housing till snug.
urified water flow
rate is lower than
normal
Low feed water
pressure
If feed water operating pressure is
lower than 2 bar, eliminate any
upstream pressure drop and consider
installing pressure booster pump.
Soiled prefilters Replace prefilters.
Soiled membranes Replace membranes.
Bent flexible tube Inspect the tubing and straighten if
necessary.
urified water runs
normally for a few
seconds, then slows
down to a trickle (in
a pressure tank
equipped system)
Deflated pressure tank
bladder
ressure tank must drain empty when
purified water tap is open and the RO
system is unplugged. If pressure in the
bladder of empty tank is less than
0,4 bar, inflate to required pressure.
The system keeps
switching on and off
and will not stop
Surges in feed water
pressure just above
low pressure switch
setting
Eliminate pressure surges. Check
supply water piping for clogs and other
obstructions and eliminate if present.
The system will not
switch on
Feed valve or main
shutoff valve is closed
Open all valves on supply water pipes.
Check for clogs/obstruction.
Low pressure switch
failure
Replace low pressure switch. Verify
proper electrical contact.
The system will not
switch off (although
purified water
faucet is closed,
pressure tank is full
or not used)
High pressure switch
failure
Replace high pressure switch. Verify
proper electrical contact.
Soiled membranes Replace membranes.