Description Of Process; Installation Requirements; Site Installation Requirements; Feedwater Requirements - BWT bestaqua 14ROC Installation And Operating Instructions Manual

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1.6

Description of process

The semi-permeable reverse osmosis membrane separates the raw water, which is supplied
under high pressure (approx. 8 bar), into desalinated purified water (permeate) and the salty
waste water (concentrate).
The percentage ratio between the permeate produced and the amount of raw water used is
called the WCF yield (%). The RO device is factory-configured for a WCF of approximately 50%.
On/off control points:
Automatic RO operation via pressure switch: 1.5 and 4.0 bar.
Note that pressure fluctuations may lead to the device switching off.
Once the connected consumer starts drawing purified water, the actual pressure drops below
the set "RO starting pressure" and the RO unit starts producing water automatically.
1.7

Installation requirements

1.7.1 Site installation requirements

Choose a place to set up the device that allows simple connection to the water supply network.
There should be a wastewater connection and a separate mains connection (100-230 V, 50 Hz) in
the immediate vicinity. The device must be electrically connected to a grounded mains socket.
The voltage supply and the required feedwater pressure must be stable.
National guidelines and regulations:
Please observe the general standards, guidelines and technical data.
Frost protection and pre-treated water:
The installation site must be free of frost and kept free of chemicals, paint, solvents and fumes.
If the municipal water supply is treated with oxidising disinfectants (such as chlorine, chlorine
dioxide, or similar), then an activated carbon filter must be installed upstream of the device and
changed regularly. Further pre-treatment may be necessary depending on the feedwater quality.
Quality of the supply pipeline:
▽
ATTENTION!
All components in contact with permeate water should be corrosion resistant.
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Electrical interference:
Interference emissions (voltage peaks, high-frequency electromagnetic fields, spurious and
voltage oscillations, etc.) of the surrounding electrical installation must not exceed the maximum
values set in the standard EN 61000-6-4.

1.7.2 Feedwater requirements

The water fed into the device must be cold water that conforms to the statutory drinking water
requirements and the water quality requirements in table 5.6.
Analysis of the local feedwater:
Any deviation from proper use, such as desalination of feedwater of impermissible quality
(non-drinking water), may result in irreversible damage to health or property (e.g. microbial
contamination of the RO device).

1.7.3 Operating pressure

For optimal functioning, the device requires a minimum operating pressure. In addition, the
water pressure should not exceed the maximum permissible pressure.
▽
ATTENTION!
The feedwater pressure must always be between 0.15 and 0.4 MPa (1.5 and 4.0 bar) as
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measured directly at the RO unit.