Isection I :: User; Available Versions; Adaptivefunction Plus; Operating Logic - Hitecsa EWMIM Serie Manual De Instalación, Uso Y Mantenimiento

I SECTION I :: USER
I.1

AVAILABLE VERSIONS

The available versions belonging to this product range are listed below.
After having identified the unit, you can use the following table to find
out about some of the machine's features.
n° of compressors
1
1
1
1
1
1
2
(*)
The power value used to identify the model is approximate, for the
exact value, identify the machine and consult the enclosed documents
(A1 Technical data).
Set-ups available for the Models EWMIMH 120÷130:
Pump:
P0 – Set up with a 3-speed electronic circulator
PI0 – Set up with an electronic circulator with continuous speed
adjustment (variable capacity of the system)
P1 – Set-up with a single pump standard head
Tank&Pump:
ASP0 – Set up with an inertial buffer tank and a 3-speed electronic
circulator.
ASPI0 – Set up with an inertial buffer tank, an electronic circulator with
continuous speed regulation (variable flow rate on the system).
ASP1 – Set up with an inertial buffer tank and single basic head
pressure pump.
Set-ups available for the Models EWMIM 138÷262 :
Standard:
Set-up without pump or tank.
Pump (main circuit):
P1 – Installation with pump.
P2 – Installation with increased static pressure pump.
DP1 – Installation with double pump, including an automatically
activated pump in stand-by.
DP2 – Installation with increased static pressure double pump, including
an automatically activated pump in stand-by.
PI1 - Set up with pump featuring constant speed control (variable
system flow rate).
PI2 – Set up with pump featuring increased head pressure and constant
speed control (variable system flow rate).
DPI1 – Set up with double pump, of which one in standby with
automatic operation and constant speed control (variable system flow
rate).
DPI2 – Set up with double pump, of which one in standby with
automatic operation and constant speed control (variable system flow
rate).
Tank & Pump (main circuit):
ASP1 – Installation with pump and water buffer tank.
ASP2 – Installation with increased static pressure pump and water
buffer tank.
ASDP1 – Installation with double pump, including an automatically
activated pump in stand-by and storage.
ASDP2 – Installation with increased static pressure double pump,
including an automatically activated pump in stand-by and storage.
ASPI1 – Set up with pump and tank featuring constant speed control
(variable system flow rate).
ASPI2 – Set up with pump and tank featuring increased pressure head
and constant speed control (variable system flow rate).
IOM_EWMIM-EWMIMH_120a262_207984_200601_ES-EN-FR-DE-IT
cooling capacity (kW) (*)
20
25
30
38
46
54
62
I.2

ADAPTIVEFUNCTION PLUS

New chillers and heat pumps with R410A inverter compressor equipped
with the innovative control logic Adaptive- Function Plus featured
throughout the range. Besides optimising compressor activation and the
relative operating cycles, the control allows optimal comfort levels to be
achieved in all load conditions and the best performance in terms of
energy efficiency during seasonal operation.
Objectives
 To always guarantee optimal unit operation in the system in which it
is installed. Evolved adaptive logic.
 Obtaining the best performance from a chiller in terms of energy
efficiency at full and partial capacities. Low consumption chillers.

Operating logic

In general, the actual control logics on chillers/heat pumps do not
consider the features of the system in which the units are installed; they
usually control the return water temperature and there aim is to
guarantee the operation of the chillers, giving less priority to the system
requirements.
The new AdaptiveFunction Plus adaptive logic contrasts these logics
with the objective of optimising chiller operation according to the system
characteristics and the actual thermal load. The controller regulates the
flow water temperature and adjusts itself according to the operating
conditions using:
 the information contained in the return and flow water temperature to
estimate the load conditions, thanks to a particular mathematical
function;
 a special adaptive algorithm that uses this estimate to vary the
values and the start-up and switch-off limit values of the compressors;
the optimised compressor start-up management guarantees a precision
water supply to the user, reducing the fluctuation around the set-point
value.
Main functions
Efficiency or Precision
Thanks to the advanced control, the chiller can run on two different
control settings in order to obtain the best possible performance in
terms of energy efficiency and therefore, significant seasonal savings or
high water delivery temperature precision:
1. Low consumption chillers: "Economy" option
It is known that chillers work at full load for only a very small
percentage of their operating time and at partial load for most of the
season. Therefore, the power they must supply generally differs from
the nominal design power, and partial load operation significantly
affects seasonal energy performance and consumption.
This makes it necessary for the unit to run as efficiently as possible
with partial loads. The controller therefore ensures that the water flow
temperature is as high as possible (when operating as a chiller) or as
low as possible (when operating as a heat pump) whilst being
compatible with the thermal loads, which means it shifts, unlike
traditional systems. This prevents energy waste associated with the
unnecessarily onerous chiller temperature levels being maintained,
thereby guaranteeing that the ratio between the power to be supplied
and the energy to be used to produce it is always optimised. The
right level of comfort is finally available to everyone!
47
ADVANCE