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Western Airconditioning Epsilon Echos+ 9 - Introduction to Epsilon Echos+; DC Inverter Compressor Technology

Western Airconditioning Epsilon Echos+ 9
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Epsilon Echos +
3
INTRODUCTION
Compressor driven by DC inverter
Epsilon Echos+use brushless compressor driven by DC inverter
which can vary the speed rotation according to the request of
the plant.
This feature will allow to overcome the limits present with on-
off compressors and will allow to obtain higher levels of COP
and EER thanks to the high heat exchanges surface available
during the reduced power operation for compressors.
Compressor speed can vary between about 30rps and about
110rps, for rotary compressor, or about 120rps for scroll com-
pressors. To ensure the best efficiency of compressor, the rated
conditions were declared at 90 rps for all models.
Electronic thermostatic valve
Electronic thermostatic valve is mounted inside the unit both
for cooling and heat pump circuits and this feature leads to a
very easy connection to the DX coil in the AHU unit.
The only physical connection necessary is for two refrigerant
pipes and for the cables for control signals.
The big advantage of this solution consists in unnecessary
dimensioning and installation of the expansion valve by the
installer.
Hydronic modules
For the hydronic versions different kind of hydronic module are
available as accessory so to meet and exceed the request of our
most demanding customers.
Variable flow pumps, with brushless motors or driven by in-
verter, are available in place of standard pumps. These allow
to obtain benefits in terms of pumping energy spent and of
increased total COP end EER of the system.
In addition, working with a variable flow, allow to maintain a
constant pressure on the plant. Indeed, variable flow pumps
are chosen to be connected to a plant which provides 2 way
valves to exclude the components or areas which do not need
for heating or cooling. The speed of the pumps, and conse-
quently the water flow, reacts to the position of the 2 way
valves.
Storage tank is always available (as an option) for all sizes and
configurations.
Minimum system volume canceled
Normally a minimum water volume has to be provided in
the system to avoid excessive variation on water temperature
during reduced load interval.
Thanks to inverter technology, Epsilon Echos+has the possibi-
lity to reduce at minimum the power delivered by the compres-
sor, so to reduce also at minimum the required water volume
to ensure an acceptable water temperature variation.
In addition, as the diagram shows, water contained in the stora-
ge tank, provided as option for Epsilon Echos+, is always enough
to ensure the comfort water temperature. This means that no
other tank have to be provided in the plant by the installer.
Epsilon Echos Epsilon Echos+
0%
50%
100%
150%
200%
250%
300%
350%
Percentage of minimum volume
9 15 20 26 30
satisfied by tank
Celest+ Celest