PACKAGED ROOFTOP UNITS 50EN/EH 415-1200
Energy saving / recovery options
■■ Plug-fan
-- Electronic plug-fans in outlet and/or return with
variable speed and flow sensor. Consult dimensions
schemes with optional supply plug-fan.
Facilities type of service industries consumption of
fans associated with air transportation assumes a high
% of the annual consumption of air conditioning. The
use of fans of greater efficiency has a direct impact on
the reduction of consumption. Plug-fans with variable
speed have associated the following advantages:
• Elimination of friction loss of t he transmission by
direct link.
• Greater efficiency aeraulics of the rotor (impeller
jet with optimized profile), with very high available
pressure.
• Greater efficiency of the motor, DC motors of
permanent magnets powered by electronic
switching integrated in the motor.
• Variable speed that allows to keep the outlet flow
constant regardless of the degree of clogging of
filters.
• Accurate measurement of flow, a section calibrated
in the fan aspiration and a differential pressure
sensor allow control handling flow reliably both on
VAC as VAV systems.
Thermal
free-cooling
Specific humidity
■■ Electronic EC axial fans in the outdoor circuit
-- These fans adapt their rotation speed to the
installation requirements, thereby reducing electricity
consumption, the sound level at partial charge and
improving the average seasonal output of the unit.
■■ Free-cooling management
The operation of the unit in free-cooling allows the outdoor
air conditions to be taken advantage of when these are more
favourable than those of the return (or ambient) air. As such,
this allows the cooling capacity to be reduced under these
circumstances.
-- The percentage of air refreshing will range from 0% to
100%.
-- There are three options for the free-cooling
management:
-- Thermal, with comparison of temperatures.
-- Enthalpic, with comparison of enthalpies.
-- Thermoenthalpic, with comparison of enthalpies and a
correction for temperature.
Dry temperature
Enthalpic
free-cooling
Specific humidity
■■ Compressors in tandem
-- This setting improves the management of stages, and
therefore the energy efficiency of the unit (models 415
to 600). Models 650 and 720 in tandem as standard.
ing
ergy sav
More en
Specific humidity
Thermoenthalpic
free-cooling
AIR TREATMENT
Dry temperature
CONTROLS
Dry temperature
C
A
R
R
I
E
R
2
0
1
6
/
2
0
1
7
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