eneren EWM User manual

HF61 J070E
USER MANUAL
ENGLISH
G
MULTIPURPOSE SPLIT UNIT: AIR-WATER HEAT PUMP
EWM

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MULTI-PURPOSE UNIT: AIR-WATER HEAT PUMP
EWM
WARNING CAREFULLY READ THIS MANUAL BEFORE USING THE UNIT.
WARNING Declaration of conformity
The declaration of conformity is attached individually to documents on the unit, generally placed
inside the circuit compartment.
Dear Customer,
In thanking you for choosing our product, we are pleased to hand this manual to you to aid in optimum
utilisation for better comfort.
Please read carefully the recommendations described in the following pages and keep the manual
available to personnel who will be responsible for managing and maintaining the unit.
Our company is at your complete disposal for any and all questions that you should require both in the
unit starting phase and at any time of its utilisation.
At times when ordinary or extraordinary maintenance will be needed, we put at your disposal as of now
our Technical Service to provide you with any assistance and spare parts.
In order to foster a quicker collaborative relationship, here is how to contact us:
J
EWM
ENEREN S.r.l.
Viale Spagna, 31/33
35020 Tribano (Pd) ITALY
Tel + 39 049 9271513
Fax + 39 049 9588522
e-mail : inf[email protected]
[e-mail]
049-9271513

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1 YOUR INSTALLATION
The manual of installation contains all suggestions for perfect installation of the equipment. It is
essential to install a mesh lter at the inlet of both water circuits: This lter should be in stainless
steel mesh with mesh not larger than 1 mm.
2 YOUR CONNECTION
Correctly perform all connections. In the FIRST START-UP REQUEST FORM you will nd a list of all
checks to be performed before starting-up the machine.
3 YOUR REQUEST
At least one week in advance send by fax the request form included in the machine documents.
If this document is missing, request a copy from HIREF S.p.a. Viale Spagna, 31/32 35020 Tribano
(Padova) - ITALY Tel. [phone] Fax. [phone] [e-mail]
4 OUR APPOINTMENT
The HIREF Support Service shall organise the procedure and you will be contacted by the area
Authorised Service Centre.
5 OUR INSPECTION
All preliminary checks and machine testing shall be performed together with your personnel.
Your personnel shall receive instructions for correct machine management.
6 OUR WARRANTY
Upon completing testing the Authorised Service Centre shall issue a testing certicate valid for
machine warranty.
HIREF S.p.A. puts at your disposal a customised maintenance schedule
START-UP INSTRUCTIONS
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CONTENTS
1 - GENERAL DESCRIPTION 7
1.1 OPERATING PRECAUTIONS 7
1.2 FOREWORD 7
1.3 LIABILITY 8
1.4 INTENDED USE 8
1.5 IDENTIFICATION OF THE UNIT 9
1.6 GENERAL INSTRUCTIONS 10
2 - SAFETY REQUIREMENTS 10
2.1 GENERAL SAFETY RULES 10
2.1.1 Thoroughly know the unit 10
2.1.2 Wear protective clothing 10
2.1.3 Use safety equipment 11
2.1.4 Warnings for inspections and maintenance 11
2.2 GENERAL PRECAUTIONS 11
2.2.1 Safety warnings 11
2.2.2 Accident prevention safety 12
2.2.3 Operating safety 12
2.2.4 Residual risk areas 13
2.3 POSITION OF THE SAFETY PLATES 13
2.3.1 Description of safety plates 14
2.4 GENERAL SAFETY RULES 15
2.4.1 Care and maintenance 15
2.4.2 Fire extinguisher and rst aid 15
2.5 PRECAUTIONS FOR MAINTENANCE 15
2.5.1 Tools 15
2.5.2 Personnel 15
2.5.3 Keep unit clean 15
2.5.4 Warning plates 16
3 - PRODUCT DESCRIPTION 16
3.1 THE SERIES 16
3.2 MAIN INTERNAL UNIT COMPONENTS 18
3.3 SYNCHRONOUS MOTORS 23
3.4 MAIN EXTERNAL UNIT COMPONENTS 24
3.5 RANGE AND OPERATION 25
3.6 DESIGN CRITERIA FOR PIPING AND CHARGING 28
3.7 OPERATION LIMITS 32
4 - INSPECTION, TRANSPORT, POSITIONING 36
4.1 INSPECTION 36
4.2 LIFTING AND CONVEYANCE 36
4.3 UNPACKING 36
4.4 POSITIONING AND INSTALLATION 36
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CONTENTS
5 - CONNECTIONS 38
5.1 HYDRAULIC CONNECTIONS 38
5.1.1 General recommendations for hydraulic connections 38
5.1.2 Technical data of hydraulic pumps 39
5.2 ELECTRICAL CONNECTIONS 41
6 - MANAGEMENT AND CONTROL 43
6.1 HIWEB FUNCTIONALITY 43
6.2 LOADS MANAGEMENT FUNCTIONALITY 44
6.2.1 Alarms 44
6.2.2 Operating mode 45
7 - MAINTENANCE AND PERIODIC CHECKS 46
7.1 Warnings 46
7.2 Maintenance table 46
8 - TROUBLESHOOTING 47
8.1 Unit alarm 47
8.2 Troubleshooting 48
9 - OPTIONAL STORAGE TANKS 50
10 - TECHNICAL DATA 51
11 - UNIT DECOMMISSIONING 53
11.1 ENVIRONMENTAL PROTECTION 53
12 - HYDRAULIC PRESSURE LOSSES 53
12.1 EVAPORATOR PRESSURE LOSSES 53
12.2 HEAT RECOVERY UNIT PRESSURE LOSSES 53
13 - R410A REFRIGERANT FLUID SAFETY DATA SHEET 54
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The operating rules contained in this manual are solely applicable for the units Model:
EWM
The instructions manual must be read and used as follows:
- every unit operator and maintenance technician must carefully read the entire manual and comply with that stipulated
therein;
- the employer is obliged to ensure that the operator satises the aptitude requisites for unit operation and has carefully
read the manual;
- read the instructions manual carefully and consider it an integral part of the unit;
- the instructions manual must be readily available to the operating personnel and maintenance technicians;
- keep the manual throughout the life of the unit;
- ensure any update received is included in the text;
- hand the manual to any other user or subsequent owner of the unit;
- for no reason whatsoever are parts of the manual to be removed, torn or rewritten;
- store the manual away from humidity and heat;
- if the manual is lost or partially damaged and therefore the contents can no longer be read entirely, it is advisable to
request a new manual from the manufacturer by communicating the code found on the cover or the serial number of the
unit.
Pay utmost attention to the following symbols and their meaning. Their purpose is to highlight specic information such as:
The operating rules described in this manual are an integral part of the unit supply.
These rules are also intended for the previously trained operator specically to operate this type of unit and contain all the
necessary and indispensable information for operating safety and optimal, proper use of the unit.
Hurried and incomplete training leads to improvisation, which is the cause of many accidents.
The following recommendations must be read carefully before starting work and strictly complied with:
- the operator must always have the instructions manual at their disposal;
- plan each operation carefully;
- ensure safety devices work correctly and there are no doubts on how they work; otherwise, do not start-up the unit;
- strictly comply with the precautions regarding specic risks referred to in this manual;
- preventive and thorough maintenance guarantees constant enhanced unit operating safety. Never delay necessary repairs
and always have them carried out solely by qualied personnel; only original spare parts are to be used.
1 - GENERAL DESCRIPTION
1.1 PRECAUTIONS FOR USE
1.2 PREMISE
WARNING With reference to additional information or suggestions for the unit to be used correctly.
ATTENTION With reference to dangerous situations that could arise while using the unit, in order to
prevent damaging objects and the unit itself.
With reference to dangerous situations that could arise while using the unit, in order to
guarantee personal safety.
DANGER
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HiRef considers itself relieved of all liability and obligations for any accident to persons or objects that may occur due to:
- failure to comply with the instructions given in this manual regarding the condition, use and maintenance of the unit;
- violent actions or incorrect manoeuvres when performing maintenance on the unit;
- modications made to the unit without previous written authorisation from HiRef;
- occurrences foreign to normal and correct use of the unit.
In all cases, whenever the user should blame the accident on a unit defect, he must demonstrate that the damage occurring
was a main and direct consequence of said "defect".
EWM is an air-water heat pump that uses external air as a source of heat and, with no combustion or ame, warms or cools
the entire home and autonomously produces hot water.
Its use is recommended within the operating limits given in this manual, or the warranty envisioned by the sale contract will
become null and void.
All other use must be deemed inappropriate and the manufacturer declines all liability for any damage to persons or objects
or that occurring to the unit itself.
1.4 INTENDED USE
1.3 LIABILITY
- When installing or servicing the unit the rules stipulated in this manual must be complied
with together with those on board the unit and in any case all necessary precautions must
be taken.
- The uids under pressure in the cooling circuit and the presence of electrical components may cause hazardous
situations during installation and maintenance work.
- Therefore, only qualied personnel may perform any work on the unit.
- THE UNIT MUST ONLY BE COMMISSIONED BY QUALIFIED PERSONNEL, AUTHORISED BY THE COMPANY PLACING IT
ON THE MARKET (SEE ATTACHMENT).
- FAILURE TO COMPLY WITH THE RULES STIPULATED IN THIS MANUAL AND ANY ALTERATION TO THE UNIT WITHOUT
PRIOR AUTHORISATION WILL IMMEDIATELY RENDER THE WARRANTY NULL AND VOID.
- Before performing any work on the unit, ensure it has been disconnected from the power supply.
- Only original spare parts must be used for repairs or maintenance operations. The MANUFACTURER declines all
liability for damage deriving from non-compliance with the above-mentioned points.
- The unit is covered by the warranty according to the contractual agreements upon sale.
- If a fault should occur, do not try to repair it yourself or have an unauthorised technician perform the repairs. The
warranty shall otherwise be rendered null and void.
ATTENTION
- Place the unit in environments where there is no risk of explosion, corrosion or re.
- Improper use could cause serious consequences to the unit.
- All routine and special maintenance operations must be performed with the unit o and
the power supply disconnected.
- Wait about 30 minutes after switching the unit o before performing any maintenance in order to prevent burns.
DANGER
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Modello - Model EWM0XXM
Matricola - Serial number HFXXXXXXXXXX
Codice ID - Code ID
Data di produzione - Date of production 22/08/17
Categoria PED/ 2014/68/EU Category II
Procedura di valutazione conformità - Conformity module D
Max pressione ammissibile PS - Max allowable pressure PS[bar-r] 41,5
"Max pressione esercizio lato bassa pressione PS
Max allowable pressure low pressure side PS [bar-r]"
41,5
Max/Min temp. di stoccaggio - Max-Min storage temperature [°C] +42 / -20
Max/Min.temp.amb. di funzionamento-Max/Min amb.working
temp.[°C] +42 / -20
Potenza frigorifera* - Cooling Capacity* [ kW ]
EER*
Potenza termica* - Heating Capacity* [ kW ]
COP*
Refrigerante - Refrigerant [Ashrae 15/1992] / GWP R410A/2088
Carica refrigerante - Refrigerant charge [kg] C1 C2 C3 C4
(1*) - - -
Refrigerante aggiunto - Refrigerant added [kg] C1 C2 C3 C4
(2*) - - -
Carica totale - Total Charge [kg] (2*)
"Tonnellate di CO2 equivalenti
Tonnes of CO2 equivalent"
Taratura press. lato ALTA - HIGH pressure Switch Set [bar-r] 41,5
Taratura press. lato BASSA - LOW pressure Switch Set [bar-r] -
"Taratura valvola sicurezza refrigerante
Safety valve refrigerant Set [bar-r]"
-
"Massima pressione esercizio circuito acqua
Max working pressure water circuit [bar-r]"
5
"Taratura valvola sicurezza acqua
Safety valve water side Set [bar-r]"
-
Alimentazione Elettrica- Power supply 230V/1ph/50Hz
Potenza massima assorbita - Max. absorbed power [kW] 5
Corrente massima - Full load ampere FLA [A] 22
Corrente di spunto - Starting Current LRA [A] /
Schema elettrico - Wiring diagram HF620Axxxx
Schema frigorifero - Refrigeration diagram HF630Axxxx
Peso a vuoto - Empty weight [kg] 260
"* EN14511-2
Contiene gas uorurati ad e󰀨etto serra disciplinati dal protocollo di Kyoto
Contains uorinated greenhouse gases governed by the Kyoto protocol
Ermeticamente sigillato/Hermetically sealed"
- MULTIPURPOSE SPLIT UNIT: AIR-WATER HEAT PUMP
Installation, use and maintenance manual
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- Before performing any work on the unit, each operator must be perfectly aware of how the
unit and its controls work and must have read and understood all the technical information
in this manual.
- It is forbidden to use the unit in conditions or for purposes other than those stipulated in this manual and The
MANUFACTURER cannot be liable for faults, issues or accidents due to non-compliance with this prohibition.
- Do not repair the high pressure pipes with welding.
- It is prohibited to tamper with, alter or modify, even partially, the systems or equipment referred to in the
instructions manual, particularly the guards provided and symbols regarding personal safety.
- It is also prohibited to operate in any way other than that stipulated or disregard required safety operations.
- Safety guidelines together with general information provided in this manual are particularly important.
ATTENTION
Each unit is characterised by an identication plate, which
is found on the frame. This states all data necessary for
installation, maintenance and traceability of the machine.
Make note of the model, serial number, denitive refrigerant
load and reference layouts of the machine at the end of
this manual in a way that they can be easily found in the
case of deterioration of the data plate and maintenance
interventions.
(1*) The refrigerant load indicated is that already present inside the unit and pre-
loaded in the factory.
(2*) The denitive refrigerant load must be written after installation, by the
technician that performed the job.
1.5 IDENTIFICATION OF THE UNIT
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1.6 GENERAL INSTRUCTIONS
- The Manual must be stored carefully in a place that is known by the user of the unit,
managers and operators in charge of transport, installation, use, maintenance, repairs and
nal dismantling.
- This manual indicates the intended use of the unit and provides instructions regarding transport, installation,
assembly, adjustment and use. It provides information regarding maintenance, ordering spare parts, the presence
of residual risks and personnel training.
- It should be noted that the use and maintenance manual can never replace adequate user experience. This manual
represents a reminder of the main operations to be performed by operators who have received specic training,
for example by attending training courses held by the manufacturer, with reference to particularly demanding
maintenance operations.
- This manual is to be considered an integral part of the unit and must be stored near the unit in a special container
until the unit is eventually demolished. Request a new copy from the manufacturer if it is lost or deteriorated.
- Ensure all users have thoroughly understood the user instructions as well as the meaning of any symbols on the
unit.
- Potential accidents can be prevented by following these technical instructions with reference to the Machinery
Directive 2006/42/EC and subsequent amendments.
- In any case, always comply with the national safety regulations.
- Do not remove or damage the safety devices, labels and notices, especially those imposed by law.
- Adhesive labels intended for safer use are applied to the unit, therefore it is very important to replace them should
they become illegible.
- This manual reects the state of the art at the time the unit is sold and cannot be considered inadequate merely
due to subsequent updates based on new experience.
- The MANUFACTURER has the right to update the production and manuals, without being obliged to update
previous production and manuals.
- Please call the telephone numbers found in this manual for any requests for updates of the use and maintenance
manual or supplements, which are to be considered an integral part of the manual.
- Contact the MANUFACTURER for further information and to submit any proposals on how to improve the manual.
- The MANUFACTURER kindly asks you to report the address of the new owner in case of transfer of the unit, in order
to facilitate forwarding any supplements of the manual to the new user.
ATTENTION
Each operator must use the personal protection devices, such as gloves,
accident-prevention glasses, accident-prevention shoes.
The unit must only be used by qualied personnel, which is obliged to know the positions and functions of all commands,
the instruments, indicators, LEDs and various plates.
2 - SAFETY REQUIREMENTS
2.1 GENERAL SAFETY RULES
2.1.1 Thoroughly know the unit
2.1.2 Wear protective clothing
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Place a rst aid kit and a re extinguisher near the unit.
The extinguisher must always be fully loaded. Use it
according to the Standards in force.
Apply a sign stating:“WORK IN PROGRESS”on all sides of the
unit.
Carefully check the unit according to the list of operations
specied in this manual.
2.1.3 Use safety equipment
2.1.4 Maintenance and inspection warning signs
INSPECTION
The machine directive gives the following denitions:
HAZARDOUS AREA: any zone within and/or around machinery in which an exposed person is subject to a risk to
their health or safety.
EXPOSED PERSON: any person wholly or partially in a danger zone.
OPERATOR: the person or persons in charge of installing, operating, adjusting, maintaining, cleaning,
repairing or moving machinery.
2.2 GENERAL PRECAUTIONS
- It is mandatory to read and comply with the instructions provided in this use and
maintenance manual before performing any operation or maintenance on the unit.
- The employer must provide all operators with accurate details regarding the risk of accidents, especially those
deriving from noise, the personal protective equipment provided and the general accident prevention regulations
implemented by international laws or regulations or those applicable in the country of use.
All the operators must comply with international accident prevention regulations and those applicable in the
country of use in order to prevent potential accidents.
Please note that the European Union has issued directives concerning the safety and health of workers that each
employer has the obligation to comply with and enforce.
- Before performing any work on the unit, each operator must be perfectly aware of how the unit and its controls
work and must have read and understood all the information in this manual.
WARNING
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- It is strictly prohibited to remove or tamper with any safety device.
- All routine and special maintenance operations together with any installation must be
performed with the unit o and the power supply disconnected.
- Once the unit is cleaned, the operator must ensure there are no worn or damaged parts or others that are not
fastened securely; otherwise, a maintenance technician must be asked to intervene.
Particular attention must be paid to the integrity of the pressurised pipes or other components subject to wear.
Also make sure there are no leaking uids or hazardous substances.
Should there be any leak, the operator is prohibited from restarting the unit before having resolved the problem.
In the event these issues are observed, the operator must ax a sign on the unit before moving away, thereby
indicating that maintenance is in progress and it is prohibited to start it up.
- It is prohibited to use ammable uids to clean the unit.
- Periodically check the state of the plates and if necessary, replace them.
- The operator's workplace must be kept clean, tidy and free from objects that could hinder movements.
- The operators must not perform awkward operations, in uncomfortable positions, that could aect their balance.
- The operators must pay attention to risks of clothing and/or hair being caught or entangled in moving parts. It is
recommended to use a cap to hold long hair.
- Chains, bracelets and rings can also pose a hazard.
- The workplace must be adequately lit up for the intended operations. Insucient or excessive lighting can pose
risks.
- The instructions, accident prevention regulations and warnings provided in this manual must always be complied
with.
WARNING
It is forbidden to tamper with or replace parts of the unit not expressly authorized by the
MANUFACTURER.
Using accessories, consumables or spare parts other than those recommended by the MANUFACTURER and/or
stipulated in this manual can constitute a risk for the operators and/or damage the unit.
Any alteration to the unit that is not specically authorised by Galletti S.p.A. relieves the manufacturing company
from any civil or criminal liability.
ATTENTION
The units have been designed and constructed according to the existing state of the art and technical rules. Applicable laws,
provisions, regulations, decrees and directives to such machinery have been complied with.
The materials used and the parts of equipment, as well as production procedures, quality and control assurance comply with
the highest standards of safety and reliability.
Unit performance, continuous operation and durability are maintained by using the units for the purposes specied in this
user manual, handling them with due care and performing thorough maintenance and up-to-standard service.
The MANUFACTURER cannot be held liable for accidents caused when using the unit, due to the user not complying with
laws, provisions, regulations and standards in force regarding uid chillers and heat pumps.
The MANUFACTURER cannot be held liable in case of malfunctions and damage if the unit:
- is used for purposes other than those intended;
- is not handled and maintained according to the operating rules specied in this manual;
- is not serviced regularly and continuously as prescribed or non-original spare parts are used;
- is either modied or a component is replaced without written authorisation from the MANUFACTURER, especially when
the eciency of the safety systems is intentionally reduced or eliminated;
- is used beyond the ambient temperature limits allowed.
2.2.1 Safety precautions
2.2.2 Accident prevention safety
2.2.3 Operational safety
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2.2.4 Residual risk areas
It has not been possible to eliminate or protect with guards certain residual risks found in
some areas of the unit during the design phase, due to specic features of the unit.
Each operator must be aware of the residual risks on this unit in order to prevent potential
accidents.
DANGER
WARNING In order to prevent the above-
mentioned risks, it is essential:
aUse the electric panel in
compliance with the manufacturer's instructions. Do
not place metal objects inside the electric panel. Do
not place ammable substances near the unit.
b Do not alter any component of the cooling circuit and
do not operate the unit beyond the limits stipulated by
the manufacturer.
c Dispose of all the materials the unit consists of correctly
and use suitable equipment to collect the refrigerant
gas (see Chap.10).
d Do not touch the internal components without
adequate safety devices during operation.
Residual risk areas:
a Risk of short circuit and re.
b Risk of explosion due to the presence of pressurised
circuits.
c Risk of pollution due to the presence of refrigerant and oil
in the circuit.
d Risk of burns due to the presence of very hot surfaces.
2.3 POSITION OF SAFETY PLATES
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a Warning of danger due to the user not being aware of all the functions of
the unit and the consequent risks.
b Read the use and maintenance manual carefully before operating the unit.
Power supply rating plate.
a Do not use water to extinguish re.
b Do not smoke and/or use open ames.
1
2
3
2.3.1 Description of the safety plates
ELECTRICAL POWER SUPPLY
POWER SUPPLY
SPG.VERSORGUNGSTEIL
400V/3/50Hz
a Electric voltage hazard.
b Risk of shearing in the nned coil area.
c Scalding hazard.
Refrigerant uid.
Hazard: moving mechanical parts
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Many accidents and damage are due to maintenance errors, such as:
- lack of water in the water circuit;
- incorrect refrigerant charge in the cooling circuit;
- inadequate refrigerant;
- failure to keep the unit area clean;
- circuit ineciency (pipe connections, pipe tightening, screws, etc.).
Maintenance must be performed carefully even for personal safety.
Never delay repairs.
Only specialised or authorised personnel must perform repairs.
Always comply with the following safety standards, even when you are completely familiar with all the operating elements:
- Always keep the unit and its surrounding area clean.
- Before starting work check that the safety devices are in perfect working condition.
- Ensure that no unqualied or unauthorised persons enter the unit area.
2.4 GENERAL SAFETY RULES
2.4.1 Care and maintenance
- Ensure the re extinguisher is in place.
- Periodically verify that the re extinguishers are loaded and all operators know how to use them.
- It is important to know where the rst aid kit is kept.
- Periodically verify that the rst aid kit is equipped with disinfectant, bandages, medicine, etc.
- Ensure the emergency telephone numbers are readily available and nearby.
If a re breaks out, use the re extinguisher according to the relative regulations in force.
Contact the re brigade.
2.4.2 Fire extinguisher and rst aid
WARNING The owner of the property where the unit is installed is responsible for providing the re
extinguisher.
Personal injury is prevented by not using worn or damaged, low quality or makeshift tools.
Routine maintenance specied in this manual must only be performed by authorised and trained personnel.
Contact the MANUFACTURER for maintenance or repairs not specied in this manual.
Stains of oil and grease and scattered tools or broken parts are hazardous as persons can slip or fall. Always keep the unit
area clean and tidy.
Do not use diesel or petroleum to clean the unit as they leave an oily layer that increases dust adhesion, and neither solvents
must be used (even if weak) as they damage the paint and increase the formation of rust.
If a jet of water penetrates the electrical equipment the contacts oxidise and the unit may malfunction.
Therefore, do not use jets of water or steam on sensors, connectors or any electrical part.
2.5 PRECAUTIONS FOR MAINTENANCE
2.5.1 Tools
2.5.2 Personnel
2.5.3 Keep unit clean
ATTENTION The manufacturer cannot be held liable for damage caused if modied tools are used.
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Switch the unit o before performing any maintenance.
Serious or fatal injury could be caused if other persons
start-up the unit and activate the control buttons while
maintenance is performed.
Ax warning signs around the unit before performing
maintenance to avoid these dangers.
2.5.4 Warning signs
DO NOT START-UP!DO NOT START-UP!
MAINTENANCEMAINTENANCE
IN PROGRESSIN PROGRESS
3 - DESCRIPTION OF THE PRODUCT
3.1 THE SERIES
EWM is a multifunction air-water heat pump that uses
external air as a source of heat and, with no combustion or
ame, warms or cools the entire home and autonomously
produces domestic hot water, prioritised or total heat
recovery in cooling mode.
The product is available in three sizes, classied according to
cooling capacity in nominal conditions, i.e. water produced
at 12 / 7 °C with external air at 35°C. The following features
are common in all three:
- Split units with compressor mounted in the indoor unit, in
order to reduce the noise emissions outside
- -Outdoor remote running unit with axial fans, light and
quiet positioned at height with simple brackets. It is
equipped with fans with asynchronous electric motor with
adjustable phase cut or, upon request, of electronically
controlled fans and permanent magnet synchronous
motor.
- Remote unit for indoor use, ductable, compact with backward-curved blade fans activated by an EC synchronous
permanent magnets motor, designed for attics.
- Expansion device: EEV (electronically-controlled expansion valve) to benet from the possibility of generating
thermodynamic cycles under reduced pressure jumps with considerable COP advantages.
- Integrated control of pumps with permanent magnet synchronous electric motor and variable speed system side and
DHW side: both pumps are managed directly from the machine.
There are three selectable sizes, classied according to the maximum cooling capacity they can supply:
EWM012 EWM022 EWM033 EWM044
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Double hydraulic circuit:
- Air conditioning circuit with cooling circuit side and waterside reversibility and set-point variable between min/max with
voltage-free contact or min/max with 0-10V or 4-20mA signal.
- DHW circuit with total heat recovery (with simultaneous cooling) or at least with priority. This circuit is separate and does
not need long heating/cooling stages of inertial storage which jeopardise energy eciency especially during summer
operation.
The basic selection in the development of the EWM series consists in using the following:
- Scroll or twin-rotary compressors
- Fans with electronically regulated engines
- Electronically controlled electric expansion valve
- High-eciency braze-welded plate heat exchangers in AISI 316
- Advanced electronic control to adequately address the needs of choking loads for optimal operation at partial loads,
increasingly the subject of evaluation and discriminated against in technical choice by heat engineering designers.
The structure of EWM series units has the following characteristics:
- internal unit:
side panelling in galvanised sheet metal painted with polyester epoxy powders and polymerised in the oven at 180°C and
a front cover that incorporates the Display, on two basic levels (LCD) and a 10” Graphic Touch Screen based on Windows
CE. The unit is fully panelled, but can be accessed on 3 sides since the panels can easily be removed, thus simplifying
maintenance and/or inspections. All routine maintenance is performed from the front of the machine.
- remote unit for external installation:
side panelling in galvanised sheet metal painted with polyester powders and polymerised in the oven at 180°C. The unit is
totally faired and panelled and is available in RAL9002 (Grey White).
6-pole axial fans with blades having a high degree of overlapping, combined with asynchronous motors with an external
rotor (or synchronous with permanent magnets on demand) and continuous modulation of the rotation speed.
- remote unit for internal installation:
sheet metal panelling galvanised and then painted with epoxy powders and oven-polymerised at 180°C. The unit is totally
faired and is available in RAL9002 (Grey White).
Radial fans with brushless motors are used, which are ideal for continuous and ecient modulation. Maximum head
available approx. 200 Pa.
The components are distributed to guarantee easy access and the layout ensures optimum weight distribution on the unit's
base.
The dimensions of the indoor unit can be divided in two frame sizes, for each model:
Frame1
- EWM012: (LxHxD)= 803x1120x501.5mm
Frame2
- EWM022: (LxHxD)= 803x1247x606mm
- EWM033: (LxHxD)= 803x1247x606mm
The dimensions of the outdoor units with axial fans are dierent for each model:
Frame1
- EWM012: (LxHxD)= 1120x1230x450mm
Frame2
- EWM022: (LxHxD)= 1410x1280x450mm
- EWM033: (LxHxD)= 2000x1512x550mm
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3.2 MAIN COMPONENTS OF THE INDOOR UNIT
FINNED PACK
HEAT EXCHANGERS
DISPLAY
INVERTER
SOLENOID VALVES
LIQUID
SEPARATOR
COMPRESSOR
CYCLE INVERSION
VALVE
WATER SIDE
LIQUID RECEIVER
PUMPS
STANDARD
USER INTERFACE
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Inverter:
Static electric energy converter, imposed by a rectier and an
AC-DC AC converter. The function of the inverter is to control
the motor power supply during an actuation. In the most
general case, in fact, the inverters allow the amplitude and/
or frequency of the motor supply voltage to be changed.
It is required when brushless synchronous motors with
permanent magnets (BLDC) are used, in order to guarantee
motor operation.
The inverter compressor is driven with proportional
regulation and proportional plus integral regulation on the
set-point in any mode.
If a simultaneous request is made by the user - cooling the
room and DHW for the system - the default set-point speed is determined by the minimum speed of the two. After the
initial start-up phase, the inverter modulates the performance of the motor in real time according to the demand of the
application, thereby supplying only the real power requested. Consequently, the frequency varies from a minimum value of
20 (30) [Hz] to a maximum of 120 Hz depending on user demand. The maximum acceleration is dened by the torque limits
that can be supplied as well as the need to minimise the amount of oil entrained into the transients and is a parameter that
cannot be modied.
INSIDE TEMPERATURE °C
MODEL WITH INVERTER
STANDARD MODEL
TIME
Scroll or Twin-Rotary R410A Compressors:
Processing optimisation together with a careful choice
of the intrinsic volumetric compression ratio (ICR) allows
for a signicant improvement in isentropic compression
performance and a consequent reduction in energy loss
during the process. Low viscosity oils can be used thanks to
the scroll and twin rotary compressor, which greatly reduce
evaporator thermal resistance, compared to high viscosity
oils, with an increase of over 1.5°C in the evaporation
temperature (over 5.5% in EER), with respect to alternative
solutions.
Hermetic orbiting Scroll compressors (EWM22 and EWM33)
or Twin Rotary compressors (EWM12) are complete with motor protection against over temperature, overcurrents and
excessive gas ow temperatures. They are mounted on on rubber anti-vibration mounts, complete with oil charge and
inserted in a soundproof compartment with sound-absorbing material. They are also equipped with an automatic oil heater
that, when the compressor stops, prevents the oil from being diluted by the refrigerant.
The compressors have a brushless synchronous motor with permanent magnets, piloted by a driver with trapezoidal wave
signal at a speed range between 30 (20) and 120 Hz [BLDC Technology “Brush Less Direct Current”].
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HFC R410A is distinguished by very
favourablethermal conductivity of the liquid
and negligible Glide, even if this results
in a higher GWP than other refrigerants (
Global Warming Potential GWP = 1975 kg
CO2), which lead to signicantly enhanced
evaporation performance together with
improved condenser performance. The
higher operating pressures and a favourable
pressure curve (temperature), allow more
compact geometries of heat exchange to be
used which, for the same exchange surface,
feature a reduced internal volume and
therefore require less refrigerant charge.
These factors combine in a reduction of the overall unit TEWI in comparison to products with other types of environmentally
friendly refrigerants of the HFC family.
The GWP of R410A is 1,975 kg CO2against the 1,177 of R407C and 1,410 of R134a. This disadvantage is made up for with
its greater EER and even better ESEER. The GWP is therefore greater than other HFC uids, but the TEWI (total equivalent
warming impact) is much less, thanks to the high eciency and reduced refrigerant charge.
With an average surface increase of 8%, the internal volume of the coils is 23 % less. The average density is then lower and
therefore the load of R410A is approximately 27% less than that of the same size R407C units.
20% 20% operating energy
(which can be supplied by renewable
photovoltaic panels)
100% kW useable
80% energy
absorbed from the environment
(renewable“clean”energy)
TEWI: Total Equivalent Warming Impact:
The TEWI: Total Equivalent Warming Impact expresses the mass of CO2that
produces the same overall eect as the chiller during its operational life. The
main feature of this parameter consists in considering the eects of the use of
refrigerant gas not only deriving from accidental emission into the atmosphere,
but also the eect on global warming which the emitted carbon dioxide for energy
production used to operate the chiller system under examination produces. The
TEWI is expressed by a relation whose addends express the component due to
indirect eect and that due to the direct eect:
TEWI = αCO2 · E + GWP · mref
• E = energy consumed by the chiller system during its operating life
• αCO2 = amount of carbon dioxide emitted to produce one kWh of electrical energy, and which depends on how it
is generated;
• mref = refrigerant charge.
In order to assess the TEWI, it is therefore necessary to estimate the eciency of the chiller systems from which the
consumption of energy, their life, the type of energy source from which it is drawn and the mass of refrigerant contained
depend.
Besides the control of emissions into the atmosphere and the choice of environment-compatible refrigerants, this type
of approach also focuses on improving the overall eciency of the chiller, which can play an important role on the actual
impact that a uid has on planet global warming, depending on the applications.
R410A refrigerant uid:
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