Hecu sistema is the CAREL high efficiency solution for condensing unit for commercial refrigeration. In his presentation at AHR Expo 2018 Brandon Marshall, CAREL's Applications Manager-Refrigeration, illustrate its main features.

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All unauthorized use, reproduction or distribution of this document or the information contained in it,
by anyone other than Carel employees is severely forbidden
This document and all its contents are for Carel internal use only and strictly CONFIDENTIAL
All unauthorized use, reproduction or distribution of this document or the information contained in it,
by anyone other than Carel employees is severely forbidden
Hecu
Carel’s Solution for High Efficiency Condensing Units

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by anyone other than Carel employees is severely forbidden
Carel’s Experience

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Condensing Unit Scenario

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Main components
• DC inverter driven HFC&CO2 compressors
• Electronic Expansion Valves
• Cabinet control & Communication
• Monitoring systems
Hecu sistema

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• Up to 2.36 Tons output for medium temperature
applications
• Up to 1.99 Tons output for low temperature
applications (booster application)
• Wide capacity modulation to maximize
efficiency at partial load
• Self-Optimization through real time communication
with showcases
• Reliable performance with precise envelope
compressor control
• Advanced oil return software features
• Stable product temperature thanks to modulating
devices and floating set-point

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by anyone other than Carel employees is severely forbidden
Highest quality of food preservation combined with high energy efficiency
The condensing unit responds to the cooling demand of each connected unit, dynamically adapting to the
current conditions.
MPXPRO controllers minimize temperature fluctuations with dynamic control of E2V valve in the cabinet.
Hecu is Food Quality

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Smooth Lines
• Continuous superheat set point modulation according to real unit demand
• Dynamic modulation of cooling capacity results in limited off cycles
• Stable product temperature and less defrost cycles
• High efficiency and stability with CAREL EEV
ADAPTIVE WORKING
CONDITION
to avoid ON-OFF
cycles
SH
set
Regulation
temp.
Hecu is Food Quality

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All unauthorized use, reproduction or distribution of this document or the information contained in it,
by anyone other than Carel employees is severely forbidden
Conventional Cabinet
Product temperatures often exceed
cabinet set point.
A cabinet with MPX PRO
and Hecu
The product temperature
is quite flat and rarely out
of range thanks to
compressor modulation
and the Smooth Line
feature on MPX PRO
Hecu is Food Quality

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All unauthorized use, reproduction or distribution of this document or the information contained in it,
by anyone other than Carel employees is severely forbidden
Full envelope management and optimum
compressor control
CAREL’s testing process approves the use of its inverter with
different models of compressors to ensure completely safe
operation in the best possible conditions.
• Detailed qualification process
• Perfect control of compressor envelope
• Safety procedures
• Extreme reliability  Reduced down time
Advanced oil return features:
Evaporator Washing Function
This feature leverages on communication with the showcases to
lower the valve superheat set point and thus recover the oil that
deposits in the evaporators.
Speed Boost Function
This feature forces the compressor to work at a sufficiently high
speed to assist with oil return.
Hecu is Maintenance Reductions

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All unauthorized use, reproduction or distribution of this document or the information contained in it,
by anyone other than Carel employees is severely forbidden
DC inverter technology
A compressor with a DC motor allows considerable energy savings as operation is optimum at part loads.
On-Off cycling is not efficient
because the refrigeration circuit
needs time to reach the nominal
efficiency. Partial load conditions
(i.e. 25%) don’t allow to reach
nominal efficiency. Average
efficiency is low.
This area represents the increase of
efficiency at partial load. It’s bigger
with a wider BLDC capacity range.
Refrigeration systems will spend a
majority of their life working in
partial load conditions.
Hecu is High Efficiency

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Floating Suction & Compressor Speed Modulation
• Continuous suction pressure set point modulation
• Optimum and stable control of the suction pressure
• Reduced compressor ON-OFF cycles
• High efficiency and stability with CAREL power+
• Wide and real
capacity modulation
• NO ON-OFF cycles
REAL TIME
SYNCHRONIZATION
with evaporator
request weighted by
capacity
Hecu is High Efficiency

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Unique controller board
For BLDC compressor
management and CO2 valve
management, both high pressure
and flash gas valves
Advanced DC compressor
driver
For an efficient compressor driving
and optimal performance at partial
load
Electronic expansion valves
For a calibrated injection and
precise regulation of gas cooler
and receiver pressure
Fully integrated and compact solution
ALL in ONE
Hecu is Easy

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Maximizing the ease of use
Easy set-up and
optimization
• Wizard guided start-up
procedures for a
simplified unit
configuration
• Pre-setting of the main
parameters and
probes to reduce
commissioning timing
Extremely fast
commissioning
• Automatic pre-
configuration of the
system network
(refrigerated cases
and condensing unit)
• Optimized default
parameters with
extensive laboratory
tests
Intuitive
programming
• User profiles for clear
navigation of what's
important to you.
• Simplified menus
• PGD and pLD PRO
terminals with full
system synoptic views
Hecu is Easy

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by anyone other than Carel employees is severely forbidden
ENERGY CONSUMPTION
System comparison and Business Intelligence within all units connected
• Energy dashboards with comparative
analysis
• Analytics for optimal food
preservation
• Centralized alarm monitoring
• Remote customized interface
• Geo localization
Hecu is Always Connected

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Fully-integrated equipment
available for Medium and Low
Temperature applications
Totally Green
Full range of available CO2 components in the market
Hecu is Natural

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by anyone other than Carel employees is severely forbidden
Hecu is Everywhere

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All unauthorized use, reproduction or distribution of this document or the information contained in it,
by anyone other than Carel employees is severely forbidden