EN
34
Table of contents EN
Chapter 4: Fault finding ............................................................................................................................. 54
4.1 Trouble shooting guide
............................................................................................................... 54
4.2 General check list for fault elimination ............................................................................................ 56
Chapter 5: Maintenance and service ........................................................................................................... 57
5.1 Maintenance and wearing parts .................................................................................................... 57
5.2 Cleaning .................................................................................................................................... 58
5.3 Replacement of membrane element ................................................................................................ 58
5.4 Option: Cable kit for external alarm contact (OUTPUT) ..................................................................... 58
5.5 Utilisation of the statistic timer ....................................................................................................... 58
5.6 Disposal ..................................................................................................................................... 58
Chapter 6: Technical data ........................................................................................................................... 59
6.1 Technical data BWT bestaqua 14 .................................................................................................. 59
6.2 Technical data BWT bestaqua 18 .................................................................................................. 60
Chapter
7: Documentation
.......................................................................................................................... 61
7.1 Form for set values of BWT bestaqua 14, 18 .................................................................................. 61
EC declaration of conformity ..................................................................................................................... 125
1.1 Abbreviations and subject index
Softening:
The water purification process removes the hardness from raw
water. Hardness constituents are the portion of calcium and
magnesium ions in the water.
Raw water:
Raw water (usually untreated drinking water) must often be pre-
treated (usually softening) and is then useable for the desalination
process in the RO device.
RO:
Abbreviation for Reverse Osmosis.
Permeate:
The largely desalinated “pure water“ filtered in the RO mem-
branes and generated by reverse osmosis. The characteristic
value is the electric conductivity in μS/cm.
Concentrate:
Waste water led to outlet. This waste water contains the salts and
minerals that have been removed from the raw water.
Membranes:
The “filter“ of the device which is capable of desalinating the raw
water by high pressure and flow.
SDI:
Abbreviation for “Silt Density Index“. The “Silt Density Index“
is an indicator of the organic contamination of raw water. The
measurement system is a filtration process which determines the
blocking tendency, measured during 15 min.
TDS:
Abbreviation for “Total Dissolved Solids“ the total amount of
dissolved salts, measured in mg/l.
Conductivity:
Electric conductivity value of the water, the smaller this measured
value (μS/cm) the better the water quality.
IOM:
Abbreviation for “Installation and Operating Manual“
Permeate yield (WCF):
The ratio between the produced pure water (permeate) and the
thus required amount of feed water (soft water) is expressed as
permeate yield (WCF) or “Water Conversion Factor“.
