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INSTALLATION AND OPERATION GUIDELINES FOR REVERSE OSMOSIS SYSTEMS

ECOSOFT ROBUST 1000, ROBUST 1500 / 1500 ЕС, ROBUST PRO / PRO EC, ROBUST 3000 / 3000 EC

1. APPLICATION

Robust reverse osmosis systems are designed for water puricaon using reverse osmosis

membranes — special semipermeable membranes that allow purifying tap water from all harmful

impuries, including nitrates and viruses (see Figure 1 below).

RObust is a mulstage direct ow ltraon system, which operates according to the following

scheme:

• Feed cold water rst undergoes pre-ltraon (1st pre-lter in the Robust 3000 system or 1st and

2nd pre-lters in other systems) where it is stripped of suspended parcles (rust, sand, hemp

strands etc.).

• The pressure booster pump feeds water to the reverse osmosis membranes mounted in parallel

or in series. If the supply of feed water is cut o or the input pressure is lowered below 0.15-0.2

bar, a low-pressure switch is triggered, closes the inlet valve and turns o the pump. Even when

the puried water faucet is opened, the system will not start unl the supply of feed water is

restored with sucient pressure.

• Permeate (puried water) goes to puried water outlet or pressure tank outlet (if installed),

passing through the carbon post-lter, and the concentrate — through the ow restrictor is

discharged into the drain.

• RObustPro system is equipped special RObustPro replacement lter allows to get water with

a small content of magnesium and calcium, which enhance the extracon of coee avor and

aroma components.

High pressure switch installed before the post-lter reads pressure in permeate line and starts the

reverse osmosis system when the pressure drops (due to taking of some water from the pressure

tank or opening puried 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. When puried

water faucet is closed, pressure starts to build up, closes high pressure switch turns o the system.

On the Robust system front panel there are two pressure gauges. One shows the water pressure

aer the pre-lters, and the second shows the pressure aer the pump in the membrane unit.

The panel also provides informaon on requirements, recommendaons for resolving possible

problems if requirement are not met.

Figure 1. Reverse osmosis process illustraon

Tap water under

pressure

Concentrate

for disposal

Membrane

Water

molecules

Molecules of smaller

size, pure water

Larger molecules