AquaProtect T0 pages

AquaProtect T
AquaProtect T
Heat exchanger system – Anti-legionella
AquaProtect T
Studies have shown that many hot water systems contain
legionella bacteria. The AquaProtect system is designed for
thermal disinfection of hot water to eliminate these bacteria.
Since the system includes heat recovery, the disinfection
process consumes no extra energy. In systems in which
previous attempts were made to reduce the bacteria count
by raising the system temperature, the energy costs can be
substantially reduced by installing the AquaProtect system
and lowering the water temperature back to its original value.
How do bacteria cause infection?
The legionella bacterium occurs naturally in lakes and water
sources and enters our water systems with the cold water.
Different materials, deposits that promote growth, and certain
temperature levels encourage legionella bacteria to propagate.
These bacteria breed most actively at temperatures between
20 and 45°C. People are infected by inhaling the bacteria
with water vapour when showering or washing. Legionella
bacteria cause Legionnaires’ disease, the symptoms of which
are similar to pneumonia, and the disease may be fatal unless
treated in time.
Which systems should be disinfected?
The larger and the more complex the hot water system,
the greater the probability or risk of high bacteria contents.
If the hot water temperature in the system is low and if the
system has been modified so that the water is stagnant in
certain pipe connections, the risk of infection will be very
high. The hot water systems in hospitals, hotels, schools,
public baths and also in shower rooms in work places and
sports facilities are typical examples of systems that should
be checked and remedied as necessary.
Reliable performance
Legionella bacteria are temperature sensitive. The Aqua-
Protect system heats the water to 70°C and keeps it at this
temperature for about six minutes, which kills the bacteria.
The water is then cooled to the required system temperature.
The AquaProtect system is rated so that it has the capacity for
periodic disinfection of the entire hot water system by heating
the water to a high temperature.
Advantages
– Safe eradication of the legionella at a temperature of 70ºC
at six minutes holding time.
– Continuous disinfection of all circulating water
– Temperature safety function, e.g. low capacity on primary
side or worse heat transfer. Depending on the set point of
the controller the distribution valve limits the flow entering
the combined reaction tank at the right temperature of 70ºC
all other flow is recirculated to the charging loop.
– Net disinfection
– Heat exchangers for waters with low/high lime content
– Standardised capacity ranges for different tapping flow rates
– Compact-system ready to be connected
– Electronic control device
Options
– Protection against capacity overload, shut-off valve on the
inlet of the storage tank, while the charging capacity is still
available for the tapping.
– AlfaNova compact heat exchanger (100% stainless steel)