Aertesi BREZZA DOUBLE Series, Technical Manual, Page: 4 / 24

1-INTRODUCTION
The new Water Cassette Series units BREZZA are designed for air conditioning in residential and
commercial plants. The installation is indoor and not exposed to ice or extreme temperatures, dust-free
environment and not explosive materials. The manufacturer is not responsible in case of incorrect use.
The series BREZZA is proposed with traditional AC motors with three speeds and which EC motors with low
consumption. The table below shows the electric power saving that can be achieved with EC motors (at
constant working point of the machine).
2- WORKING CONDITION LIMITS
Electrical power supply 220 ÷ 240V / 50Hz
Inletcoil water temperature 5 ÷ 70°C
Return air temperature 10 ÷ 50°C
RH air intake 15 ÷ 70%
It is advisable to let work the Brezza Cassette at the above mentioned extremes limits of operation ONLY for
short periods, because the operation for long periods can reduce normal components.
3- COANDA EFFECT
New cassette Series BREZZA has been developed to ensure a high comfort. In fact, the particular shape of
the panel as per the COANDA effect, avoids the annoying cold drafts (since ever the problem of fan-coil
cassettes).
The COANDA effect is the tendency of a fluid jet to follow the contour of a nearby surface. So the air flow
follows the ceiling, then fells nearly at the wall. Since the air speed at this point is very low, this does not
create discomfort to people.
Traditional Cassette Cassette with Coanda effect