Page 6 - Manual – Countertop Reverse Osmosis System G21 – Osmo

Water exchange
When the „ “ indicator comes on, this means that there is only waste water in the tank. Pour it out
and refill the clean water section of the tank to the MAX level.
Why is the water tank divided into two parts and what does waste water mean?
In order to achieve a longer lifetime of the individual filters and the equipment itself, we have
divided the tank into two parts - the first, where clean water is poured, and the second, where
the so-called waste water flows. At the top of the tank you will find an overflow where the waste
water flows back to the clean water section. The sediments remaining in the waste water are held
at the bottom of the container, so that only less concentrated water overflows and is filtered again.
The internal membrane filters the wastewater at a ratio of 1:2 (1 liter of clean water to 2 liters of
wastewater) until the clean water section of the tank is empty and only the wastewater section
remains full. This results in a total wastewater ratio of 1:1. This process reduces the potential for
membrane clogging during filtration.

Sleep mode
After one hour of inactivity, the device automatically goes into sleep mode to save electricity. To
enter standby mode, simply press any temperature mode.
Temperature control - „Coffee“ mode
When the lock is on, long press the „Coffee“ button to enter the temperature control mode. The
device displays „95“, press the „Coffee“ button to increase the temperature by 1°C, press the
„Tea“ button to decrease the temperature by 1°C. The adjustable temperature range is 85 - 95 °C.
The setting is saved and exited after five seconds of inactivity.

Functions of individual filters
1. PAC – PP filter with activated carbon - removal of impurities such as rust, sand, settled solids,
removal of residual chlorine and absorption of unwanted tastes and odors - replacement
period 6-12 months
2. RO – Reverse Osmosis Filter - filter accuracy 0,0001 µm, removal of coarse impurities,
bacteria and heavy metals - replacement time 12-24 months.
3. CF – improves the taste of filtered water - replacement time 6-12 months
How is the water filtration itself carried out?
The water first passes through a pre-filter that reliably removes sediments and inorganic substances
such as chlorine. This filter serves primarily to protect the reverse osmosis filter membrane. After
pre-filtration, the water flows through a booster pump and is forced through the membrane by a
sweat pressure of 0.4-0.6 MPa. This membrane has filter holes as small as 0.0001 µm, allowing
only the smallest ions and water molecules to pass through. Due to this extremely fine structure
of the membrane, filtered substances must also be removed to prevent clogging. This is why
wastewater is produced. In the final filtration, the water passes through a secondary carbon filter,
which ensures a balanced pH value and adds the necessary minerals and fresh taste.