Western Airconditioning Epsilon Echos+ 9 User manual

Epsilon Echos+
5÷38 kW
General information
Air-Water unit with scroll compressors driven by DC inverter
Configuration
/LN: Low noise unit
/HP: Reversible heat pump
/LE /HP: Reversible condensing unit
Unique selling points
►Compressors driven by DC inverter
►Highest efficiency class
►High configurability in terms of hydronic module
►No water volume needed on the plant
►Wide power modulation range and operation limit

Epsilon Echos +
2
INDICE
INTRODUCTION 3
TECHNICAL FEATURES 5
DESCRIPTION FOR FUNCIONTS AND ACCESSORIES 7
TECHNICAL DATA 10
TECHNICAL DATA /LE 11
ELECTRICAL DATA 12
ELECTRICAL DATA + /LE 12
DIAGRAMS CONSTANT FLOW PUMP 13
DIAGRAMS VARIABLE FLOW PUMP 13
DIAGRAMS EXCHANGER 13
COOLING CAPACITY 30Hz 16
COOLING CAPACITY 60Hz 17
COOLING CAPACITY 90Hz 18
COOLING CAPACITY 120Hz 19
RESE IN RISCALDAMENTO 30Hz 20
HEATING CAPACITY 60Hz 21
HEATING CAPACITY 90Hz 22
HEATING CAPACITY 120Hz 23
/LE COOLING CAPACITY 30Hz 24
/LE COOLING CAPACITY 60Hz 24
/LE COOLING CAPACITY 90Hz 25
/LE COOLING CAPACITY 120Hz 25
/LE HEATING CAPACITY 30Hz 26
/LE HEATING CAPACITY 30Hz 27
/LE HEATING CAPACITY 90Hz 28
/LE HEATING CAPACITY 120Hz 29
NOISE LEVELS - (90 rps) 30
NOISE LEVELS - /LN (90 rps) 30
DIMENSIONAL DRAWING 31

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

Epsilon Echos +
4
Highest efficiency class
The use of a heat pump in A class with inverter driven compres-
sor, combines the optimal comfort even at partial load and low
operating costs per year.
0
500
1000
1500
2000
2500
3000
3500
-22 -19 -16 -13 -10
-7 -4 -1
2 5 8
11 14 17 20 23 26 29 32 35 38
Building energy request [kWh]
External air temp. [°C]
COOLING
HEATING
For example, consider a load profile of a building as shown in
the diagram above, where the thermal profiles times are based
on the requirements of EN 14825 in Helsinki.
This calculation has been made by comparing high efficiency
Epsilon Echos+with different units with different efficiency
classes, equipped with inverter. Epsilon Echos+means a 2 years
payback.
Epsilon Echos+ /HP 30
A
B
C
D
EPSILON ECHOS+ /HP 30
29.900
kWh
34.390
kWh
37.380
kWh
41.050
kWh
+680 €/year
+1.130 €/year
+1.670 €/year
Connection with a DX coil
Epsilon Echos+/LE has the possibility to be managed from the
on/off signal a 0-10V signal and the commutation summer/
winter from a AHU. Through the 0-10V signal the AHU can
handle the compressor modulations due the capacity needs.
Units /LE or /LE/HP is supply with a refrigerant charge to allow
the connection to the direct expansion coil in a range of 10 m
within the machine.

Epsilon Echos +
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TECHNICAL FEATURES
STRUCTURE
In galvanized sheet steel and painted with polyester powders
RAL 7035 at 180 °C, which confer high resistance to at-
mospheric agents. The panels can be removed easily to allow
total access to the internal components.
COMPRESSORS
The compressors are “twin rotary” or “scroll” with inverter
controlled brushless DC motor, operating with R410A and
power supply of 400-460V/3ph/50-60Hz. The compressors
are provided with integrated thermal overload protection and
acoustic hood.
The compressor motor control driver is provided with integral
electronic protection against overtemperature, overcurrent,
over or under-voltage with absence of one or more phases.
The electronic control of the inverter is provided with automa-
tic soft-start system and continuous control of the compressor
curve to prevent and correct its use beyond the maximum
allowed limits.
FANS
Helical fans coupled directly to the 6-pole electric motor with
external rotor, IP 54 degree of protection. Each fan has shaped
nozzles and is fitted with protection grille in compliance with
UNI EN 294.
SOURCE SIDE EXCHANGER
This comprises a battery with copper pipes and aluminum gills
with large exchange surface. A metal mesh protects the fin-
ned core.
USER SIDE EXCHANGER
Exchanger with AISI 316 stainless steel braze-welded plates,
insulated with a closed cell foam coating. The heat exchanger
has a temperature probe for anti-freeze protection and a blade
flow meter as per standard.
Not present in LE version.
REFRIGERANT CIRCUIT
BASIC VERSION
Includes: charge connection on the liquid and intake lines,
liquid sight-glass, filter/dryer, electronic thermostatic valve, li-
quid line solenoid valve, pressure transducer, high pressure
safety pressure switch and safety valve (only for /HP version).
/LE VERSION
Includes: charge connection on the liquid and intake lines,
liquid sight-glass, filter/dryer, electronic thermostatic valve, li-
quid line solenoid valve, pressure transducer, high pressure
safety pressure switch, safety valve (only for /LE/HP version),
liquid receiver, delivery oil separator, valves (split type) on suc-
tion and liquid line.
ELECTRIC CONTROL BOARD
With general isolating device, protection of the power and
auxiliary circuits. Microprocessor management of the unit with
main functions shown on display.
The electric control board is made up from:
• Main isolating switch and automatic circuit breakers protec-
ting the auxiliary and power circuits
• Condensation/evaporation control with fan rev. regulator
• Pump relay or motor protector and contactor (for units with
hydronic module)
• Voltage-free contacts for general alarm
• Microprocessor for control
The controller allow the following features:
• Water temperature regulation with inlet control
• Anti-freeze protection
• Compressor timing
• High pressure pre-alarm management
• Alarm signals
• Alarms reset
• Remote ON-OFF from digital input
• Summer/Winter selection from digital input
• 0-10V or 4-20mA for external management of compressor
modulation (only for /LE and /LE/HP versions)
Display of controller allow the visualization of following para-
meters:
• Temperature of the outlet water
• Condensation temperature
• Set temperature and differentials set-point
• Description of the alarms
• Compressor and pump timer functioning
CHECKS AND SAFETY DEVICES
• Functioning probe for detecting the temperature of the
inlet water
• Antifreeze probe at evaporator outlet connected to anti-
freeze alarm (automatic reset, with limited thresholds)
• High pressure switch (with manual reset)
• Mechanical flow-switch supplied as kit per standard
• Condensation/evaporation pressure control with rev. regu-
lator
• High-pressure safety valve (only for /HP and /LE/HP versions)
• Compressor over-heating protection (managed directly by
driver).
INSPECTION
The units are inspected in the factory and supplied complete
with oil and refrigerant fluid.

Epsilon Echos +
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VERSIONS
/LN: Low noise unit
As well as the components of the basic version, the unit
has a completely sound insulated compressors compartment.
Sound-absorbing material is used along with sound impeding
material.
/HP: reversible heat pump
The unit includes, in addition to the components of the basic
version, a 4-way reversing valve, liquid receiver and check
valves.
/LE /HP: reversible condensing unit
The unit includes, in addition to the components of the /LE ver-
sion, a 4-way reversing valve, liquid receiver and check valves.
HYDRAULIC MODULE OPTIONS
/1P: unit with pump
This unit is equipped with
• a circulator for model 9 and 15
• a pump for model 20, 26 and 30
For all models the hydronic module includes an expansion ves-
sel, a water circuit drainage valve and a safety valve set at 6
bars (maximum allowable operating pressure).
/1PS: unit with pump and tank
In addition to the components of the /1P version, the unit in-
cludes an insulated storage tank.
/1PV: unit with variable flow pump
This unit is equipped with
• a A class EC circulator with variable flow for model 9 and 15
• a pump with integrated inverter for model 20, 26 and 30
For all models the hydronic module includes an expansion ves-
sel, a water circuit drainage valve and a safety valve set at 6
bars (maximum allowable operating pressure).
If the unit is connected to a system equipped with valves
two-way, the pump will vary its flow rate so as to maintain a
constant pressure head. In this case the customer will have to
provide a bypass or a 3-way valve suitably positioned to ensure
a minimum flow rate equal to 50% of nominal flow.
/1PVS: unit with pump and tank
In addition to the components of the /1PV version, the unit
includes an insulated storage tank.
STANDARD EQUIPMENT
• Main isolating switch
• Coil protection mesh
• Microprocessor control
• Condensation control (and evaporation control, for the /HP
and /LE/HP versions) with fan rev. regulator
• Liquid line solenoid valve
• Electronic thermostatic valve
• Flow switch (provided as kit)
• Certification in accordance with Directive 97/23 EEC (PED)
• Summer/Winter selection from digital input
• Remote ON/OFF from digital input
• 0-10V or 4-20mA for external management of compressor
modulation (only for /LE and /LE/HP versions)
• Condensate drain pan(standard for model 9 and 15)
• Phase monitor
ACCESSORIES
REFRIGERANT CIRCUIT ACCESSORIES
• Liquid line valve
• Brine Kit
HYDRAULIC CIRCUIT ACCESSORIES
• Filling system with manometer
• Anti-freeze heater
• Electric integration heater (only for units /HP/1PS and /
HP/1PVS)
• Water filter
ELECTRIC ACCESSORIES
• Non standard Power supply
• RS485 serial interface
• Remote user terminal
• Single voltage-free operating contacts
• Compensation of the set-point depending on the external
air temperature
• Unit shutdown due to temperatures lower than the functio-
ning limit
• Maximum and minimum voltage relay
VARIOUS ACCESSORIES
• Rubber anti-vibration mounts
• Condensing coil in pre-painted aluminum
• Condensing coil treated with anti-corrosion paint
• Wooden cage packaging
• Condensate drain pan

Epsilon Echos +
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DESCRIPTION FOR FUNCTIONS AND AC-
CESSORIES
Condensation/evaporation control with fan rev. regula-
tor (standard)
The microprocessor control monitors all the operating para-
meters of the unit and constantly regulates the speed of the
fans by means of a rev. regulator to optimize the operating
conditions and efficiency of the unit.
As a result, the unit also runs much more quietly. The con-
trol device typically modulates the speed of the fans at night
and during half-season. The machine therefore minimizes fan
speed and the level of noise at every given opportunity.
Remote ON/OFF from digital input (standard)
All the units come with this function as standard. It consists of
a remote contact for turning the machine on and off by means
of a signal that can be taken inside the building by a Building
Management System (BMS).
Summer/winter selection from digital input (standard)
This function is standard for all heat pumps. When you switch
on the unit, you need to set either heat pump or chiller mode.
The remote contact makes it possible to change the work
mode even inside the building and without direct access to the
microprocessor control.
Electronic thermostatic valve (standard)
This accessory is recommended for units that have to tolerate
highly variable refrigeration load or variable working condi-
tions, for example when managing both air conditioning and
the production of water at a high temperature. Use of the
electronic thermostatic valve makes it possible to:
• maximise the heat exchange to the evaporator
• minimise time of response to variations in load and working
conditions
• optimise the regulation of over-heating
• guarantee maximum energy efficiency
Standard also for /LE and /LE/HP units.
Brine Kit
This accessory is required when the outlet temperature of the
evaporator is within the range of +3°C and -8°C. It consists of
extra thermal insulation of the exchanger and tubes, specific
calibration of the low pressure gauges and anti-freeze alarm,
and testing of the size of the mechanical thermostatic valve.
Filling system with manometer
This accessory enables automatic loading of the hydraulic sys-
tem and correct adjustment of the working pressure shown on
the manometer, and maintains the level of pressure in the hy-
draulic system refilling the system with water when necessary.
Anti-freeze heater
These heaters are fitted on the exchanger, pump and tank
(depending on machine configuration) to prevent damage to
the hydraulic components due to the formation of ice when
the machine is out of use.
The control device monitors the outlet probe of the exchanger
(even when the unit is in standby) and when this registers
a water temperature of 5°C or less (or 2°C below the set
point temperature, with a differential of 1°C) it triggers the
antifreeze heater. When the temperature of the outlet water
reaches 4°C (or 3°C below the set-point), it also triggers the
anti-freeze alarm that stops the compressor without however
disabling the heaters.
Integration electrical heater
This is an electric heater installed in the inertia storage tank of
the ST 1PS module that helps the heat pump reach the setpoint
temperature when the power supplied by the machine is not
sufficient for the load.
The accessory is available only for version /HP /ST 1PS
RS485 serial interface
The increasing use of home automation and BMS (Building
Management System) systems has led to the need for a single
comprehensive supervision system for all the various compo-
nents. The unit can, therefore, be equipped with a serial board
that permits perfect integration of the machine within the
”building-system” with MODBUS or CAREL communication
protocols
Remote user terminal
Intended for a professional user, this accessory consists of a
faithful reproduction of the control panel at which you can
fully configure the unit and view its parameters on the display
screen. The insertion of passwords is required to access the
parameters at different levels.
Compensation of the set-point depending on the exter-
nal air temperature
Units equipped with this microprocessor control accessory can
compensate the set point according to external air temperatu-
re. The compensation can be positive or negative: with positive
compensation, the set-point increases in relation to the exter-
nal air temperature, while with negative compensation the
set-point decreases in relation to the external air temperature.
Only winter set point can be compensated.
Unless specified otherwise in the order, standard programming
involves negative compensation as shown in the diagrams
below. All the settings can be modified directly by the control
system.
12 / 7°C
SET POINT 1
25°C
T1 T2
35°C
17 / 12°C
5°C
12 / 7°C
35 / 40°C
SET POINT 1
SET POINT 2
SET POINT 2
SET POINT 1
25°C
T1 T2
35°C
17 / 12°C
5°C
30 / 40°C
SET POINT 2
0°C
T1 T2
15°C
40 / 45°C
5°C
40 / 45°C
SET POINT 2
SET POINT 1
0°C
T1 T2
15°C
5°C

Epsilon Echos +
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Unit shutdown due to temperatures lower than the
functioning limit
This accessory is available for the /HP and LE/HP units. It stops
the compressors of the unit when this is in heat pump mode
and the external air temperature falls below a minimum set
temperature: the controller stops the compressors before the
unit triggers the low pressure alarm, avoiding the need to ma-
nually restart the machine.
This accessory is particularly useful when the heat pump is in-
stalled in an area where the external air temperature is almost
bound to fall below the minimum temperature threshold (in
accordance with the set-point).
When the external air temperature returns above the set tem-
perature threshold, the unit restarts automatically without the
need for any manual intervention.
For units with integrated pump, the latter is kept running to
prevent the formation of ice and to ensure correct operation of
the temperature probes and anti-freeze safety devices.
The shutdown temperature has to be configured in relation
to the set-point temperature and the operating restrictions of
the machine.
This accessory must be used in conjunction with the “Com-
pensation of the set-point depending on the external air tem-
perature” accessory.
If not specified otherwise in the order, the default settings of
the unit are:
• Summer set-point at 12°C for the return temperature with
negative summer compensation
• Winter set-point set at 40°C for the return temperature
• Shutdown of the unit when the external air temperature
• Falls below -20°C
It is possible to configure a shutdown temperature other than
the default one providing it is compatible with the unit’s ope-
rating restrictions.
Maximum and minimum voltage relay
This device monitors the supply voltage of the unit to ensure
it remains within a permissible range. When the voltage goes
outside the range, the device stops the unit to avoid damage
to the electric motors.
The device also monitors phase sequence.
Single voltage-free operating contacts
The terminal block in the control box is fitted with voltage-
free contacts that receive the signal indicating the compressor
works.

Epsilon Echos +
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Epsilon Echos +
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TECHNICAL DATA
(1) Ambient air temperature 35°C; evaporator inlet/outlet water temperature 12-7 °C;
compressor frequency 90 rps
(2) Total power input is sum of compressors and funs power input
(3) Ambient air temperature 7°C BS, 87% UR; conderser inlet/outlet water temperature
40-45 °C; compressor frequency 90 rps
(4) Sound power values calculate in compliance with ISO 3744; compressor frequency 90 rps
Unit size 915 20 26 30
Epsilon Echos+
Cooling (A35°C; W7°C) (Gross values)
Nominal cooling capacity (1) kW 6,2 10,8 16,1 22,1 26,2
Total power input for cooling (1), (2) kW 1,8 3,2 5,0 6,8 8,1
EER (1) 3,34 3,37 3,23 3,26 3,25
ESEER 3,75 3,95 3,94 3,29 3,76
Efficiency class AAAAA
Min/Max cooling capacity kW 2,1 / 7,7 3,9 / 13 5,8 / 19,6 8,3 / 26,3 10,5 / 30,1
Epsilon Echos+/HP
Cooling (A35°C; W7°C) (EN 14511 values)
Nominal cooling capacity (1),(8) kW 6,1 10,7 16,0 21,9 25,9
EER (1),(8) 3,20 3,23 3,12 3,11 3,12
ESEER (8) 3,45 3,62 3,66 3,00 3,46
Efficiency class AAAAA
Min/Max cooling capacity kW 2,1 / 7,6 3,9 / 12,8 5,8 / 19,5 8,2 / 26,1 10,4 / 29,9
Heating (A7°C; W45°C) (Gross values)
Nominal heating capacity (3) kW 6,8 12,0 17,9 23,7 28,3
Total power input for heating (2),(3) kW 1,9 3,5 5,2 6,7 8,0
COP (3) 3,54 3,48 3,42 3,55 3,56
Efficiency class AAAAA
Min/Max heating capacity kW 2,3 / 8,6 4,2 / 14,8 6,3 / 22,6 8,4 / 28,3 10,8 / 35,2
Heating (A7°C; W45°C) (EN 14511 values)
Nominal heating capacity (3),(8) kW 6,9 12,1 18,1 23,9 28,6
COP (3),(8) 3,46 3,40 3,35 3,45 3,47
Efficiency class AAAAA
Min/Max heating capacity kW 2,3 / 8,7 4,3 / 14,9 6,4 / 22,7 8,6 / 28,6 10,9 / 35,5
Compressors
Type Twin rotary Twin rotary Scroll Scroll Scroll
Quantity/Refrigerant circuits n° / n° 1 / 1 1 / 1 1 / 1 1 / 1 1 / 1
Fans
Type Axial Axial Axial Axial Axial
Quantity n° 22222
Air flow m3/h 8.000 7. 60 0 13.200 19.000 17. 8 0 0
User side exchanger
Type Plate Plate Plate Plate Plate
Quantity 11111
Water flow rate l/h 1.066 1.850 2.774 3.802 4.499
Pressure drop kPa 31 39 37 65 56
Hydraulic module
Constant flow pump model P1 P1 P2 P3 P3
Available constant flow pump pressure kPa 86 66 161 135 126
Variable flow pump model Pi1 Pi1 Pi2 Pi3 Pi3
Available variable flow pump pressure kPa 97 75 268 221 206
Storage tank capacity l 70 70 130 130 130
Sound level
Sound power value (standard unit) (4) dB(A) 70 72 75 75 76
Sound pressure value (standard unit) (5) dB(A) 39 41 44 44 45
Sound power value (LN version) (4) dB(A) 67 69 72 73 74
Sound pressure value (LN version) (5) dB(A) 36 38 41 42 43
Basic unit size and weights
Width mm 925 925 1105 1305 1305
Depth mm 375 375 505 505 505
Height mm 1350 1350 1385 1585 1585
Operating weight kg 154 157 227 272 278
(5) Sound pressure values measured at 10 meters from the unit in free field conditions
and directional factor Q=2; compressor frequency 90 rps
(8) Values in compliance with EN 14511-3:2011
This datasheet gives the characteristic data of the basic and standard versions of the
series; for details refer to the specific documentation.