eneren EHA Air Condensed Chiller User Manual

: October 30, 2023
: eneren

Table of Contents

eneren EHA Air Condensed Chiller
Product Information: EHA and Process Cooling
Start-up Instructions
Product Identification
INTRODUCTION
START-UP INSTRUCTIONS
SAFETY SYMBOLS
Scope of application
References
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eneren EHA Air Condensed Chiller

Product Information: EHA and Process Cooling

Introduction
EHA is a cooling unit designed for process cooling applications. The product comes with a user manual that provides detailed information on the correct use of the equipment. The manual contains important safety instructions and guidelines that must be followed to ensure the proper functioning of the unit.

Start-up Instructions

Step 1: Installation
Refer to the installation manual for tips on how to install the equipment correctly. It is essential to place a stainless steel net filter at all water circuit inlets. The filter should have a mesh size of no more than 1 mm.

Step 2: Required Accessories
The following hydraulic components are required for the proper operation of the unit:

Y-strainers in the inlet pipes to the unit
Anti-vibration couplings in each pipe connected to the unit
Safety valves of appropriate dimensions on each circuit of the system
Expansion vessels of appropriate dimensions on each circuit of the system

Step 3: First Start-up
Send a machine start request via email or fax to ENEREN at least 15 working days in advance. ENEREN will organize an intervention by putting you in contact with authorized Technical Assistance Center of the area. All preliminary checks and testing of the machine will be carried out together with your staff, who will receive instructions on how to operate the machine correctly.

Step 4: Warranty Issue
The first start-up by an Authorized Technical Assistance Center is mandatory for the warranty to be valid. After testing, the Authorized Technical Assistance Center will issue a valid test certificate for the machine warranty.

Product Identification

Each unit has an identification plate located on its frame and inside the electrical control panel. The label shows the following data:

Manufacturer/Marketing body
CE mark, possibly accompanied by a subscript that identifies the certifying body for the Pressure Equipment Directive 2014/68/eU (PeD). The number of the certifying body must be indicated for units of a PeD category equal to or greater than class 2.
Series and size of the unit
Date of manufacture
Main technical data

Note the model, serial number, final refrigerant charge, and machine reference diagrams attached to the manual so that they can be easily found in case of data plate damaging and system maintenance.

User ManUal
EHA
AIR-CONDENSED CHILLER, HEATPUMP, FREE-COOLING AIR WATER UNIT FOR CONDITIONING
AND PROCESS COOLING
EN
TRANSLATION OF THE ORIGINAL INSTRUCTIONS
HF61GJ0349G / 05_23

EHA | USER MANUAL

INTRODUCTION

EHA

WARNING
CAREFULLY READ THIS MANUAL BEFORE USING THE UNIT.

C DECLARATION OF CONFORMITY
The declaration of conformity is attached separately to the documents on board the unit, usually placed inside the
electrical compartment.

Dear Customer,
Thanking you for choosing our products, we are pleased to provide you this manual for the correct use of equipment.
Please read the recommendations described in the following pages carefully 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 utilization.
should scheduled and unscheduled maintenance be necessary, please contact our after-sales Technical service for assistance and spare parts.
Please find here attached our direct contacts in case you may need assistenace:

EHA | HF61GJ0349G

START-UP INSTRUCTIONS

YOUR INSTALLATION
all the tips required for a perfect installation of the equipment can be found in the installation manual. It is important to place a net filter at all water circuit inlets.

The filter must be made of stainless steel with a mesh that does not exceed 1 mm.

REQUIRED ACCESSORIES FOR A PROPER INSTALLATION OF THE UNIT

For the proper operation of the unit and for the validity of the warranty, the installation of the following hydraulic compo-
nents will be necessary: Y-strainers in the inlet pipes to the unit; anti- vibration couplings in each pipe connected to the
unit;

appropriately dimensioned safety valves on each circuit of the system;
appropriately dimensioned expansion vessels on each circuit of the system.

FIRST START-UP
With at least 15 working days in advance, send the machine start request via email or fax to the following contact ENEREN: Fax. 049 9588522 e-mail: support@eneren.it Tel. 049 9271513 eneren assistance will organize the intervention by putting you in contact with authorized Technical assistance Center of the area. all the preliminary checks and testing of the machine will be carried out together with your staff. Your staff will be given instructions for the correct running of the machine.

WARRANTY ISSUE
For the warranty to be valid, the first start-up by an Authorized Technical Assistance Center is mandatory After testing, the Authorized Technical Assistance Center will issue a valid test certificate for the machine warranty.

Each unit has an identification plate that is located on its frame and inside the electrical control panel, which shows all the data necessary for the installation, maintenance and traceability of the machine.
THE LABEL SHOWS THE FOLLOWING DATA:
Manufacturer/Marketing body Ce mark, possibly accompanied by a subscript that
identifies the certifying body for the Pressure Equipment Directive 2014/68/eU (PeD). The number of the certifying body must be indicated for units of a PeD category equal to or greater than class 2. series and size of the unit Date of manufacture Main technical data Note the model, the serial number, the final refrigerant charge and the machine reference diagrams attached to this manual so that they can be easily found in case of data plate damaging and system maintenance.

ATTENTION
never remove the label. This shows the serial number of the unit from which it is possible to obtain information about the technical features and the components installed, to then identify the unit correctly.

Modello – Model

Matricola – Serial number

Codice identificativo – ID code

Data di produzione – Date of production

Categoria PED/ 2014/68/EU – Category PED/ 2014/68/EU

Procedura di valutazione conformità PED – PED conformity module

Max pressione ammissibile (PS) lato alta pressione – Max allowable pressu-

re (PS) high pressure side [bar-r]

Max pressione esercizio (PS) lato bassa pressione – Max allowable pressure

(PS) low pressure side [bar-r]

Max/min temperatura di stoccaggio – Max/min storage temperature [°C]

Max/min temperatura ambiente di funzionamento – Max/min ambient

working temperature [°C]

Potenza frigorifera – Cooling capacity [kW]

EER*

Potenza termica – Heating capacity [kW]

COP*

Refrigerante – Refrigerant [Ashrae 15/1992] / GWP

Carica refrigerante – Refrigerant charge [kg]

C1 C2 C3 C4

Refrigerante aggiunto – Added refrigerant [kg]

C1 C2 C3 C4

Carica totale refrigerante – Total charge refrigerant [kg]

CO2 equivalenti – CO2 equivalent [t]

Taratura pressione lato alta – High pressure switch set [bar-r]

Taratura pressione lato bassa – Low pressure switch set [bar-r]

Taratura valvola sicurezza refrigerante lato alta/bassa pressione – Safety

valve refrigerant high/low pressure side set [bar-r]

Massima pressione esercizio circuito acqua – Max working pressure water

circuit [bar-r]

Taratura valvola sicurezza acqua – Safety valve water side set [bar-r]

Alimentazione elettrica – Power supply

Potenza massima assorbita – Max absorbed power [kW]

Corrente massima – Full load ampere FLA [A]

Corrente di spunto – Starting current LRA [A]

Schema elettrico – Wiring diagram

Schema frigorifero – Refrigeration diagram

Peso a vuoto – Empty weight [kg]

EN14511-2

Contiene gas fluorurati ad effetto serra disciplinati dal protocollo di Kyoto/

Contains fluorinated greenhouse gases governed by the Kyoto protocol

Ermeticamente sigillato/Hermetically sealed

SAFETY SYMBOLS

WARNING A DANGER
B ATTENTION

With reference to additions or recommendations for the correct use of the unit.
With reference to dangerous situations that may occur with the use of the unit to guarantee personal safety.
With reference to dangerous situations that may occur with the use of the unit to prevent damage to property and to the unit itself.

GENERAL CAUTIONARY NOTES
The operating rules contained in this manual are an integral part of the unit supply and are valid exclusively for the units covered by this manual. They contain all the useful and necessary information for safe operation and ideal, recommended use of the unit. The declaration of conformity is attached individually to the literature kept on the machine, usually inside the control cabinet.
Please follow the instructions given below: · read carefully the instruction manual which should be considered an integral part of the unit. · every operator and the personnel in charge of unit maintenance must read the manual throughout carefully and observe its prescriptions. · The employer is requested to make sure that the operator has the necessary aptitude requirements for operating the unit and has carefully read the manual. · The instruction manual must be easily available to the operation and maintenance personnel. · Keep the manual for the entire working life of the unit. · Make sure any updates that are received are integrated into the text. · Hand over the manual to any other user or subsequent owner. · Use the manual so that the contents are not damaged – entirely or in part. · Do not remove, tear off or rewrite parts of the manual for any reason. · Keep the manual with care; it must be available at the unit, stored in a special container, to protect it from moisture and heat, until
final scrapping of the machine. The location where the manual is kept must be known to the user of the unit, to the managers, to the persons in charge of transportation, installation, use, maintenance, repairs, and end-of-life dismantling and scrapping. If the manual is lost or partially damaged, so that it is no longer possible to read all of its contents, it is advisable to request a new one from the manufacturer. · avoid hasty and incomplete preparation that lead to improvisation and cause many accidents. Pay close attention to the safety symbols shown in the table on the previous page and to their meaning. Before starting to work, read through and strictly observe the fol-
lowing suggestions: · the operator must always have the instruction manual readily available at any time; · plan each action carefully; · before beginning to work, make sure that the safety devices work properly and you have no doubts about their operation; otherwise, do not under any circumstances start the unit; · carefully observe the warnings relating to special hazards contained in this manual; · preventive and thorough maintenance guarantees constantly high operating safety for the unit. never delay repairs and always
have them carried out solely by qualified personnel; only original spare parts are to be used. THe ManUFaCTUrer shall not be liable for any accident to per-
sons or property which may occur due to: · failure to comply with the instructions in this manual regarding the operation, use and maintenance of the unit; · violent actions or incorrect manoeuvres when performing maintenance on the unit; · alterations made to the unit without prior written authorisation from the ManUFaCTUrer; · events that are, in any case, unrelated to the normal and correct use of the unit; · in any case, if the user attributes the incident to a defect in the unit, he must prove that the damage caused was a main and direct consequence of this “defect”.
This manual reflects the state of the art at the time of unit sale: The ManUFaCTUrer reserves the right to update its products and manuals without any obligation to update earlier products and manuals, except in special circumstances. These may not be considered inadequate only because they have been subsequently updated based on new experience.

B ATTENTION
· The installer must provide adequate documentation that must comply with en 378-3 if applicable in the country of installation; otherwise, reference should be made to the local regulations in force. · 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 fluids under pressure in the cooling circuit and the presence of electrical components may cause hazardous situations during installation and maintenance work. · Any action on the unit must be carried out by qualified and authorised personnel. In the event of a fault, do not attempt repairs on your own and do not let unauthorised technicians carry out repairs, or the guarantee will no longer be valid. · The initial start-up must be carried out exclusively by qualified personnel authorised by the marketing entity (see annex). · Before performing any work on the unit, ensure it has been disconnected from the power supply. · For maintenance service or repairs always and exclusively use original spare parts. THe ManUFaCTUrer declines all responsibility for damages that may occur due to non-compliance with the above. · The unit is guaranteed according to the contractual agreements entered into upon its sale: however, failure to comply with the rules and instructions contained in this manual and any modification in the unit not previously authorised, will cause an immediate loss of guarantee validity. · This manual describes the intended use of the unit and provides instructions for its handling, installation, assembly, adjustment and use. It supplies information on the maintenance schedule, how to order spare parts, the presence of residual risks, and staff training. Therefore, before handling, installing, using or carrying out any maintenance on the unit, read the manual very carefully. · It is important to remember 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 specific training, for example by attending training courses held by the manufacturer, with reference to particular maintenance operations. · Make sure all the users have thoroughly understood the operating instructions together with the meaning of any symbols on the unit. · Possible accidents can be avoided by following these technical instructions drafted in accordance with the Machinery Directive 2006/42/eC and subsequent additions. · In any case, always comply with national safety regulations. · Do not remove or damage guards, decals, stickers and wording, especially any that are required by law. · adhesive labels intended for safer use are applied to the unit, therefore, it is very important to replace them if they become illegible.
C WARNING
· The electrical wiring, hydraulic and refrigeration diagrams and the technical data shown in this manual are supplied for guidance only and may be changed without prior notice for the purpose of improving the product range. For detailed information on specific models, refer to the specific documentation attached to the each product. any updates or additions to this use and maintenance manual are to be considered an integral part of the manual and may be requested via the contact phone numbers listed in this manual. Contact the ManUFaCTUrer for additional information and to share any feedback and recommendations aimed at improving the manual. If the unit is transferred to a new owner, the ManUFaCTUrer expects you to please notify the address where to send any manual additions for the new user.

EHA | USER MANUAL

Scope of application

The liquid chillers, Free-Cooling chillers and reversible heat pumps of the eHa series have been designed for cooling or heating water and glycol solutions in applications suitable for civil, industrial and technological conditioning.

WARNING
regarding the unit setting and its use, it is important to know that: all models of the series eHa are designed and built for
outdoor installations: avoid covering with canopies or positioning close to trees (even if only partially covering the unit) – which might obstruct regular ventilation of the unit external finned heat exchanger; the units are designed and built to operate in the temperature ranges indicated in paragraph 8.2 Operating limits p. 42: applications outside the indicated limits may be authorised by the ManUFaCTUrer, subject to verification and subsequent written authorisation. The air-water units are equipped with electric resistors, on request, for heating the plate heat exchanger, should the unit be exposed to cold temperatures during the winter shutdown period. This resistor is activated when the water temperature at the exchanger outlet falls below the anti-freezing probe calibration temperature; the storage temperature of the unit must be within the limits indicated in the paragraph 8.2 Operating limits p. 42; the units are designed to operate in a closed hydraulic circuit. In the case of open tanks, it is advisable to contact the design department which will indicate the best solution to adopt, such as uncoupling the exchanger; ventilation of the unit external finned heat exchanger and the clearance space around it must be guaranteed; avoid positioning the unit in such a way that the prevailing winds cause the recirculation of air to the external exchangers; a speed of 8 m/s (28.8 km/h) is enough to produce a sufficient stagnation pressure to guarantee about 60% of the rated airflow. [For situations where the wind action is unavoidable and there is a simultaneous presence of temperatures below -5°C, condensation control for low outdoor temperatures must necessarily be of the condenser exchanger flooding or throttling type. Please contact the manufacturer’s design department for details]; be aware that in certain environments there could be sound wave reverberation; the installation environment must be immediately suitable from first positioning of the unit and not just after installation completion (for example, do not install and operate the unit in premises and open work sites where completion works might damage the unit); the unit must only be used for housing, industrial and technological conditioning; any other use is considered not recommended. failure to comply with the aforementioned items and those contained in the manual will cause an immediate

loss of guarantee validity; in this case, the manufacturer declines all responsibility for any damage to persons, property or the unit that may derive from it.

DANGER
Install the unit in environments without any risks of explosion, corrosion or fire.
Make sure that the unit is supplied an adequate volume of air at both intake and outlet ends.
any use that does not conform to the expected conditions could result in serious consequences for the unit.
all ordinary and extraordinary maintenance operations must be carried out with the unit switched off, by disconnecting the power supply.
Wait approximately 30 minutes after switching off the unit before carrying out any maintenance operations to avoid burns.
During normal operation, human traffic in the area around the machine must be prevented up to at least the required buffer spaces.

ATTENTION
Before starting any work on the unit, each operator must be perfectly familiar with its operation and its controls, and have read and understood all the technical information contained in this manual.
It is forbidden to use the unit in conditions or for uses other than what is indicated in this manual and the ManUFaCTUrer may not be held responsible for breakdowns, accidents or injuries due to failure to comply with this prohibition.
Do not repair high pressure pipes with welds. It is forbidden to tamper with, alter or modify, even par-
tially, the systems or equipment described in the instruction manual, and in particular, the guards and warning symbols required for personal safety. It is also forbidden to operate in manners different from those indicated or fail to perform operations necessary for safety reasons. safety instructions are particularly important, as well as general information contained in this manual.

Product information
eHa It is the range of air condensed liquid chillers by eneren with scroll compressors. The different versions and numerous power output rates make these units highly versatile and suited to a wide range of system set-ups. sizing and selection of individual components have focused on containing energy consumption, aiming to optimize energy savings not just for individual chillers but for the entire system. The unit is suitable for being installed in environments where noise abatement is fundamentally important, thanks to the possibility of choosing from three soundproofing set-ups. The configurations available for the refrigerant circuit are:

EHA | USER MANUAL

EFFICIENCY PACK 0: one compressor on single circuit EFFICIENCY PACK 1: dual compressor on dual circuit for
high system redundancy. EFFICIENCY PACK 2: dual compressor (tandem) on sin-
gle circuit for greater efficiency at partial loads. EFFICIENCY PACK 4: four compressors (dual tandem) on
dual circuit, for a redundant system that is also efficient with low loads.

3.3 Models and versions
The units in the series eHa are available in the version with liquid chiller, Free-Cooling chiller and reversible heat pump. It is possible to choose from different operating noise versions (standard, low noise versions), and the available chilling configurations (Efficiency packs) allow an extensive power range to be covered. All models are filled with R410A refrigerant. The naming methods and the unit configuration options are shown below.

» Example of unit configuration

EHA 06 2 C S

1 2 345
1 Unit name 2 Unit sizes expressed in rated cooling capacity x10 [kW] (e.g. 60
kW) 3 efficiency packs: · 1 = bicircuit / bicompressor unit · 2 = bicompressor (tandem) on single circuit · 4 = four compressors (dual tandem) on dual circuit 4 configuration: · C = chiller only · H = reversible heat pump · F = Free-Cooling chiller 5 Execution: · S = standard · L = silenced · Q = super- silenced

EHA | HF61GJ0349G

» Configuration options

Versions

Air-condensed chiller

Reversible heat pump

Free-Cooling chiller

List of options

Execution

Standard

Low noise

Power supply

400/3/50 + N + Circuit breakers

400/3/50 without neutral wire + magnetothermal cutoff switches

Control microprocessor and lamination device

programmable (8×22 LCD display) + electronic expansion valve

User side water pump

none

single pump

oversize single pump

double pump for combined operation

oversize double pump for combined operation

double pump in timed rotation

oversize double pump in timed rotation

modulating single pump

oversize modulating single pump

modulating double pump (in timed rotation)

oversize modulating double pump (in timed rotation)

Buffer tank

none

inertial tank on user side

Partial heat recovery (mandatory condensation control)

none

desuperheater (recovery of 40% of Pf in rated conditions)

Air flow modulation

condensation control with phase cut fans

condensation control with “EC brushless” electronic control fans

Antifreezing kit

none

protecting the water exchanger (standard machine)

protecting the water exchanger and pump

protecting the water exchanger, pump and tank

Remote communication

none

RS485 serial board (Carel / Modbus protocol)

Lonworks serial board

Ethernet board (SNMP or BACNET protocol)

Ethernet board + supervision software

Finned batteries

standard

copper / copper batteries

cataphoresis

epoxy pre-painted fin and overall painting

pre-painted fin with epoxy treatment

hydrophilic treatment

copper / copper coils – if free cooling

cataphoresis – if free cooling

epoxy pre-painted fin and overall painting – if free cooling

pre-painted fin with epoxy treatment – if free cooling

Packing

standard

wooden cage

wooden crate

Anti vibration shock mounts

none

Rubber vibration dampers at the base of the unit

Spring vibration dampers at the base of the unit

User water side thermal approach

countercurrent in chiller mode

cycle reversal valve on water side for “always countercurrent”

Protection of finned coils

none

Finned battery protection grid

Finned battery metal filters

List of accessories

Power factor capacitors

Soft-starter kit

Service kit (probes kit for quick troubleshooting)

Two Vic-Taulic joints for fast IN-OUT water connection

Compressors ON-OFF state

Remote contact for power limitation

Configurable digital alarm card

Measurement and limitation of the absorbed current

Manometers

Filter shut-off kit (solenoid and tap on liquid line)

Directives reference other than “2014/68/UE – PED”

Unit lifting kit

Remote display for programmable microprocessor

On-board electronic flow switch

3.4 Main technical specifications
For the main technical data of the range eHa see Product Document.
C WARNING
The technical data of the manual refer to the standard range, without optional devices, and are subject to changes without prior notice aimed at improving the product.

EHA | USER MANUAL

4 SAFETY PRESCRIPTIONS

The following are some general rules useful for ensuring the safety of people who are in contact with the unit.

B ATTENTION

It is up to the installer and the owner of the installation site

to define the safety and protection devices to be used for

unit maintenance operations or in dangerous situations – as

well as the emergency procedures to be adopted in the latter

case. all this in accordance with current legislation and in

conjunction with local rescue units.

4.1 General safety rules

4.1.1 Thoroughly know the unit The unit must only be used by qualified personnel, who are expected to know the arrangement and function of all controls, instruments, indicators, indicator lights and various data plates.
4.1.2 Wear protective clothing each operator must use personal protective equipment such as gloves, headgear, safety goggles, safety shoes, and hearing protection.
OS OS

B ATTENTION
Please also refer to the relevant section in chapter 14 Safety data sheet of refrigerant p. 61.
4.1.4 Fire extinguisher and a first aid kit
Check the presence and location of the fire extinguisher. Regularly check that the fire extinguishers are charged and their operating instructions are clearly understood. It is required to be aware of where the first aid box is kept. Periodically check that the first aid kit is stocked with disinfectants, bandages, drugs, etc. The personnel must know what to do in the event of a fire. Make sure that emergency help phone numbers are readily available. In the event of a fire, use a fire extinguisher in compliance with the regulations in force. Contact the fire department.
C WARNING
The owner of the building where the unit is installed must provide the required fire extinguisher.

4.2 General precautions

B ATTENTION
Please also refer to the relevant section in chapter 14 Safety data sheet of refrigerant p. 61.
4.1.3 Use safety equipment A first aid kit and a fire extinguisher must be placed near the unit.

The Machinery Directive 2006/42/eC provides the following definitions (Annex 1.1.1.1): DANGER ZONE: any area next to and/or inside a machine, where the presence of an exposed person constitutes a risk for the safety and health of said person. EXPOSED PERSON: any person found entirely or partially within a danger zone. OPERATOR: the person (or persons) appointed to install, set up, adjust, maintain, clean, repair and transport the machine.
C WARNING
Before carrying out any operation or maintenance on the unit it is mandatory to read and follow the instructions given in the use and maintenance manual. During the actual work, it would be too late: any not recommended

EHA | HF61GJ0349G

or wrong operation could then cause serious damage to people or property. The employer must inform in detail all operators about the risks of accidents and particularly about risks related to noise, required personal protective devices and general accident prevention rules provided by laws or international standards and national standards in the Country of destination of the unit. all operators must comply with the international accident prevention standards and standards in force in the country of destination of the unit. Please be reminded that the european Union has issued some directives concerning the safety and health of workers, among which the directives 89/391/ eeC, 89/686/eeC, 89/654/eeC, 2009/104/eC, 89/656/ eeC, 2003/10/eC, 92/58/eeC and 92/57/eeC that each employer has an obligation to observe and to enforce. In the event that the unit is installed outside the european union, always refer to the regulations in force in the country of installation. Before starting any work on the unit, each operator must be perfectly familiar with its operation and its controls, and have read and understood all the information contained in this manual.
B ATTENTION
It is forbidden to tamper with or replace parts of the unit unless this has been expressly authorised by the ManUFaCTUrer. The use of accessories, tools, consumables or spare parts other than those recommended by the ManUFaCTUrer and/or specified in this manual may be a hazard to operators and/or damage the unit. any alteration of the unit not expressly authorised by the ManUFaCTUrer shall not imply any civil or criminal liability for the manufacturing company.
C WARNING
It is strictly forbidden to remove or tamper with any safety devices.
any installation, ordinary and extraordinary maintenance operations must be carried out with the unit stopped and without power supply.
Once the unit has been cleaned, the operator must check that there are no worn or damaged parts or parts that are not safely fixed, or if this is the case, ask the maintenance staff to fix the problem. Special attention must be paid to the state of repair of the pressurised pipes or other parts exposed to wear. It must also be ensured that there are no leaks of fluid, or other dangerous substances. In these cases, it is forbidden for the operator to restart the unit before the situation has been remedied. If any of these occurrences are detected, the operator, before leaving the unit unattended, must display a warning sign indicating that maintenance is in progress and it is forbidden to start the unit.
The use of flammable fluids in cleaning operations is prohibited.
Periodically check the condition of the data plates and arrange, if necessary, for them to be restored.
The operator work place must be kept clean, tidy and free from any objects that may limit unhindered movement.
Operators should avoid operating the device from unsafe, uncomfortable positions that may affect their balance.

Operators must be aware of possible risks of entrapment and entanglement of clothes and/or hair in moving parts; it is recommended to wear caps over long hair.
Wearing chains, bracelets and rings can also be dangerous.
The workplace must be adequately lit for the intended operations. Insufficient or excessively bright lighting can imply safety risks.
The instructions, accident-prevention rules and warnings contained in this manual must be observed at all times.
4.2.1 Safety information
The units have been designed and built according to the current state of the art and the technical rules currently applicable to fluid chillers and heat pumps and/or fluid chillers with free-cooling exchange intended for cooling water or water and anti-freezing agent mixtures, for housing air conditioning and industrial cooling systems. Compliance with the laws, provisions, prescriptions, orders and directives in force for these machines has been ensured. The materials and the equipment parts used, as well as the production, quality assurance and control processes meet the highest safety and reliability requirements. By using them for the purposes specified in this user manual, by operating them with the required diligence and performing accurate maintenance and overhauling in a workmanlike manner, consistent performance and functionality and durability can be ensured.
4.2.2 Accident prevention
The ManUFaCTUrer will not be liable for accidents, during the use of the unit, due to failure by the user to comply with laws, provisions, prescriptions and regulations applicable to fluid chillers and heat pumps and/or fluid chillers with free-cooling exchange system.
4.2.3 Operational safety
The ManUFaCTUrer will not be responsible in case of malfunctions and damage if the unit: it is used for purposes other than those for which it is
intended; it is not operated and maintained according to the ser-
vice standards specified further on in this manual; it does not regularly and consistently receive mainte-
nance as prescribed or non-original spare parts are used; is modified or some components are replaced without
the ManUFaCTUrer’s written authorisation, especially when the effectiveness of the safety systems has been altered or minimised on purpose; it is used outside the permissible temperature range.
4.2.4 Residual risk areas
A DANGER
In some areas of the unit there are some residual risks that could not be eliminated during the design phase nor isolated with guards due to the unit’s operating characteristics. each operator must be aware of the residual risks present in this unit in order to prevent any accidents.

» Residual risk areas

EHA | USER MANUAL

A. Danger of fire B. Impact and abrasion hazard in fan area C. Danger of explosion due to the presence of pressurised circuits D. Danger of pollution due to the presence of refrigerant in the circuit E. Danger of cutting injuries near finned exchangers F. Danger of burns due to the presence of high temperature pipes
C WARNING
In order to avoid the risks listed above it is essentially important to: set the control panel according to the manufacturer’s in-
structions; to avoid the risk of impact or abrasion in the fan area, cut
off the power to the unit before intervening; not place metal objects inside the electrical control pan-
el; not store flammable materials near the machine; not alter any component of the refrigerant circuit; not let the machine work outside the limits indicated by
the manufacturer; dispose of all the materials that make up the machine
correctly, use suitable equipment for the recovery of the refrigerant gas (see chapter 13 Retiring the unit p. 59); not touch the internal components during operation without adequate protection.
13

4.3 Location of safety data plates
4.3.1 Description of the safety symbols

EHA | HF61GJ0349G

A. Warning: danger due to poor familiarity with all the functions of the unit and the resulting risks.
B. read the use and maintenance manual carefully before operating the unit.

2 electric power supply data plate

A
3

A. Danger: hot parts.

B. Danger: live parts.

C. Danger of burns.

D. Danger of cutting injuries in the finned exchangers area.

4 anchor points for lifting

B
+ B D

5 refrigerating liquid

6 Charge connection without core valve

Attacco di carica senza spillo Charge connection without core valve NoyauLadeanshluss ohne Ventil

EHA | USER MANUAL

4.4 Maintenance precautions
4.4.1 Tools Use only tools suitable for safe service and maintenance operations. Personal injury is prevented by not using worn or damaged, low quality or makeshift tools. If tools not recommended or modified without authorisation are used, the manufacturer will no longer be liable for damages caused.
4.4.2 Personnel Ordinary maintenance prescribed in this manual must only be performed by authorised and trained personnel. For the maintenance or overhauling of components not specified in this manual, contact the ManUFaCTUrer.
4.4.3 Keep the unit clean Oil and grease stains, misplaced tools or broken pieces are harmful to people as they can cause slipping or falls. always keep the area where the unit is installed clean and tidy. Do not use diesel fuel, oil or solvents to clean the unit as the first two leave an oily film that makes it easier for dust to stick, while solvents (even milder ones) damage the paint finish and cause rusting. If a water jet hits the inside of electrical equipment, in addition to causing contact oxidation, it may cause the unit malfunction. For this reason, do not use water or steam jets on sensors, connectors or any electrical parts.

4.4.6 Care and maintenance
The cause of damages and accidents is often attributable to
wrong maintenance, such as: no water in the circuit; incorrect percentage of anti-freezing agent in the hydrau-
lic circuit; inadequate refrigerant; poor cleaning in the unit setting; circuit inefficiency (damage to the exchangers, pipe con-
nections, tightening of pipes, screws, etc.).
Carry out maintenance work as required: this is also critical for your own safety. never postpone scheduled repairs. Only assign skilled or authorised personnel to repair tasks. always observe the following safety rules, even when you
are thoroughly familiar with the operations involved: always keep the unit and the surrounding area clean;
before beginning to work, check the perfect efficiency of protective devices;
make sure that no unqualified or not specially appointed persons enter the unit operating area.

4.4.4 Warning plates
Before starting any maintenance operation, turn off the unit. If other people start the unit and operate the control buttons while maintenance operations are being performed, serious injury or even death may result. To avoid these dangers, before carrying out maintenance, hang caution signs around the unit.

4.4.5 Warnings for inspections and maintenance
Display a sign with the warning: “INSPECTION IN PROGress” on all sides of the unit. Check the unit carefully following the list of operations contained in this manual.

INSPECTION IN PROGRESS

EHA | HF61GJ0349G

4.5 Precautions in case of refrigerant leakage
In case the unit is charged with an A2L classified refrigerant, (low flammable refrigerant), the unit is provided with one refrigerant leakage sensor inside each compressor box (if

present) and inside all separated sections of the electrical box. The following safety chain is applied: EVENT – ACTION – SIGnal each sensor is set on two different concentration thresholds. The threshold is depending on refrigerant type, and list-
ed in the table below:

Refrigerant
r454B

Classification
a2l

Low level threshold
900 ppm

High level threshold
1800 ppm

The following image and table describe the safety chain EVENT – ACTION – SIGNAL

ELECTRICAL BOX

COMPRESSOR BOX

56 7

10 1 2

56 7

10 1 2

89 89 89 89

34
34 34 34

56 7

CRITICAL ALARM

WARNING SIGNAL

Critical alarm Warning signal

Sensor high level alarm, sensor breakdown Sensor low level alarm, air pressure switch alarm/breakdown, compressor box/auxiliary box fan breakdown

EVENT Compressor box fan alarm fault Underpressure inside electrical panel alarm/fault
Low level alarm
Refrigerant sensor fault High level alarm

ACTION Electrical box fans activation (when Tair <= T limit) Compressor box fans activation Compressor box fans activation Electrical box fans activation (when Tair <= T limit) Switch off all the unit (electrical supply still present) Switch off all the unit (electrical supply still present)

SIGNAL Dedicated warning signal Dedicated warning signal
Dedicated warning signal
General serious alarm + Dedicated serious alarm General serious alarm + Dedicated serious alarm

A DANGER
refrigerant safety devices are not active when the unit is not powered: risk of refrigerant presence in the electrical panel. Check any refrigerant leaks with a suitable device before starting the unit.
C WARNING
Follow the instructions below in the event of a refrigerant leak signal from the sensors installed on the machine or possibly present near the machine: In case of low level alarm, contact technical support. Do not stand in the vicinity of the machine.
It is necessary to have a remote refrigerant alarm signal, so that it is not necessary to approach the machine in the event of an alarm. This remote signal can be performed: Via remote display, available as an option and available
at any time by contacting the after-sales center; By reading the unit alarms via remote communication
(e.g. via Modbus or ethernet) and by remotely setting up

a specific danger signal far from the unit to activate in the event of an alarm.
B ATTENTION
In case of serious alarm: remove voltage from the unit, keeping the dedicated
alarm signal via wired contact active (see wiring diagram). Call a service centre for assistance.
Technical assistance must: Well ventilate all the closed compartments of the ma-
chine well for at least 5 minutes, before energizing. Check the cooling circuit for leaks. Once the circuit is set up and the refrigerant charge is re-
stored, close the compartments and power up the chiller, if there are no alarms, the machine can be restarted.

EHA | USER MANUAL

5 TRANSPORT, INSPECTION, HANDLING, DIMENSIONS AND POSITIONING OF THE UNIT

The following are recommended and necessary indications to correctly carry out transporting, handling and positioning of the unit. To this end, information is also provided regarding the distribution of weights, anti-vibration devices to be used and clearance space around the unit.

5.1 Transport
In order not to damage the structure and components, the units EHA must be fixed to the transport vehicle using the supports shown in the following figure. The image on the left refers to cases including accessories.

» USE THE SUPPORTS TO FIX THE LOAD

The storage temperature of the unit must be in accordance with the indications in paragraph 8.2 Operating limits p. 42 and on the identification plate on the unit frame. Outside of this range the Manufacturer will not be responsible for any damage that may occur to the unit.

also check the integrity of the documents supplied on-board the machine and attached to this manual.
5.3 Conveyance

5.2 Inspection
Upon receiving the unit, check its integrity: the machine has left the factory in perfect condition; any damage must be immediately reported to the forwarder and noted on the Delivery report before signing it. In particular, check that the fins of the finned pack exchangers are not bent and have not suffered impacts that could have compromised the pressurised system tightness. The manufacturers or their agents must be informed as soon as possible about the extent of the damage. The Customer must submit a written report for any significant damage. Check that the following items are present: start-up instructions wiring diagram

During handling, it is mandatory to check the dimensions, weights, centre of gravity and lifting points. also check that the lifting and positioning equipment complies with the applicable safety regulations. During the unloading and positioning of the unit, be extremely careful to avoid bumps and knocks or sudden movements. Handling must be carried out carefully and gently, avoiding to apply pressure to any machine components. Depending on the unit frame, there will be different handling modes.
The unit leaves the factory fixed with screws on a wooden pallet – thanks to which it can be easily handled with a forklift truck. Once the unit has been removed from the pallet, handle it avoiding to apply pressure on the side panels, the heat exchanger and the fan grid

EHA | HF61GJ0349G

The unit shall be lifted using seamless pipes – ref. en10255

s195T – in steel Ø1½” Gas at least 3 mm thick (optional)

inserted into the round holes provided in the base rails (a)

and marked with the special stickers. The pipes that must

protrude by at least 250-300 mm from each end will be har-

nessed with identical ropes, secured to the lifting hook (pro-

vide fasteners at the ends of the pipes in order to avoid that, due to the applied weight, the rope slips off the pipe).

A. Hole on the basement B. lifting tube without welding Ø 1½” – s195T C. safety bolt D. locking nut E. rope – belt

The harnesses used for lifting the load are of critical importance in the operations in which they are used, therefore,
they must meet the following requirements: be applied to strong parts to which the remaining part of
the load is firmly connected; be resistant to the load to which they are applied with a
considerable safety margin; be non-slipping; be well balanced; be as short as possible, to prevent the crane hook from
failing to reach the end of its working stroke, which would require the load to be lifted in several steps; be long enough to exceed the height of the machine so as not to damage the sides and the top of the unit. For the same reason, also use bars and spacer plates, to be positioned on the top of the unit. The rectangular holes are those in which the (optional) an-
ti-vibration supports must be fixed.

B ATTENTION
In all lifting operations make sure that the unit has been securely anchored, in order to avoid overturning or accidental falls. Use all the lifting points.
The actual capacity of a tie rod depends on its vertex angle and is determined by dividing the vertical capacity by the load increase factor.

» Flow chart according to the variations in the working angle

EHA | USER MANUAL

Vertex Angle (°)
Load increase factor

0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 1 1.004 1.015 1.035 1.064 1.103 1.155 1.221 1.305 1.414 1.556 1.743 2.000 2.336 2.924 3.864 5.759

170 11.474

3000

B ATTENTION
The use of tie rods having a vertex angle with respect to the vertical line greater than 60° is not recommended; beyond this limit, the capacity of the tie rod varies considerably for each small change in the angle or according to general conditions of use.
Once the load has been positioned on the vehicle floor, the unit must be secured with special straps. see the paragraph 5.1 Transport p. 17 for strap fixing instructions.
OS

5.3.1 Dimensions In the paragraph 3.4 Main technical specifications p. 10 the dimensions are shown for the units in the range eHa. For more detailed information on space requirements, please refer to the dimensional drawings supplied with the unit.
19

EHA | HF61GJ0349G

5.3.2 Weight tables
The following images show the points of the machine for which the delivery weight has been calculated. Distribution is different depending on the frame and therefore, the size, the unit design and the presence or absence of hydronic modules. For this reason, it is necessary to identify the dimensional model and frame, to be able to use the following tables.

C WARNING
all the weights shown are inclusive of refrigerant charge and water charge in the hydraulic system (very important when making a decision regarding the most suitable support for the unit, especially if it is equipped with a tank). an approximate weight of the vacuum unit can be calculated by subtracting the weight in kg of the water content shown in the following table. The water content depends on the size, the unit design and the presence or absence of hydronic modules.

FS-FL CS-HS FS CL-HL FL CS-HS CL-HL CS-HS FS CL-HL FL CS-HS CS

81-

Size

30 30-35 30 30-35 35

62 81-101 101-

104

Frame

1+ 2++ 2++

Water content with pumps

Water content without options

Water tank content

100 100 100 100 100 100 100 200 200 200 200 200 220 220

FL CS-HS CL-HL CS

Size
Frame Water content with
pumps

81- 8281-101 101- 102-
104 104

104

121

121124

121

121- 122124 124

124

141171

141144

141171

141144

2++ 2++ 2++ 2++ 3+

Water content without options

Water tank content

220 220 220 220 340 340 340 340 340 340 600 600 600 600

CS-HS CL-HL FS

FL CS-HS FS CL-HL FL CS-HS FS CL-HL FL

Size Frame

142-

144- 144- 171- 171172- 174 174 174

204

244294

244

244294

244

294

174

Water content with pumps

51 100 100 80 155 80 155 100 184 100 184 191 190

Water content without options

51 100 100 80 155 80 155 100 184 100 184 191 190

Water tank content

600 600 600 600 600 600 600 600 765 765 765 765 765 765

EHA | USER MANUAL

5.3.2.1 Total STD weights

» C version weight distribution – without hydraulic options

Size

Frame

Total kg

81-82 81-82

101102

104

121122

1+ 2++ 2++ 2++ 2++ 2++ 2++ 3+

107 109 108 111 230 237 229 237 287 294 302 310 317 324 161 164

107 109 108 111 80

99 102 104 107 109 112 108 110

107 109 108 111 80

99 102 104 107 109 112 108 110

–

161 164

–

161 164

–

108 110

–

108 110

427 437 434 444 619 639 617 637 773 793 813 833 853 873 1078 1098

Size

Frame

Total kg

124

141142

144

171172

174

204

244

294

167 170 208 212 214 218 222 227 228 233 247 252 321 326 321 325

112 115 140 143 144 147 150 153 154 157 168 171 234 238 236 240 112 115 140 143 144 147 150 153 154 157 168 171 234 238 236 240 167 170 208 212 214 218 222 227 228 233 247 252 286 290 296 301 167 170 208 212 214 218 222 227 228 233 247 252 286 290 297 302

112 115 140 143 144 147 150 153 154 157 168 171 199 202 201 204

1118 1138 1391 1421 1431 1461 1491 1521 1531 1561 1660 1690 2080 2110 2110 2140

» H version weight distribution – without hydraulic options

Size

Frame

Total kg

HS HL HS HL HS HL HS HL HS HL HS HL HS HL HS HL

82 102 102 104 104 122 122

1+ 2++ 2++ 2++ 2++ 2++ 2++ 3+

108 111 110 112 236 243 235 242 295 302 309 317 324 332 168 171

108 111 110 112 81

84 102 104 107 109 112 115 113 115

108 111 110 112 81

84 102 104 107 109 112 115 113 115

–

168 171

–

168 171

–

113 115

–

113 115

432 442 440 450 634 654 632 652 793 813 833 853 873 893 1128 1148

Size

Frame

Total kg

HS HL HS HL HS HL HS HL HS HL HS HL HS HL HS HL

124 124 142 142 144 144 172 172 174 174 204 204 244 244 294 294

174 177 214 218 220 224 228 232 234 238 255 259 339 344 339 343

117 120 144 147 148 151 155 158 159 162 173 176 238 241 239 242 117 120 144 147 148 151 155 158 159 162 173 176 238 241 239 242 174 177 214 218 220 224 228 232 234 238 255 259 294 298 309 314 174 177 214 218 220 224 228 232 234 238 255 259 294 298 309 314

117 120 144 147 148 151 155 158 159 162 173 176 199 202 198 201

1168 1188 1431 1461 1471 1501 1531 1561 1571 1601 1710 1740 2140 2170 2170 2200

EHA | HF61GJ0349G

» F version weight distribution – without hydraulic options

Size

Frame

Total kg

81 101 101 104 104 121 121

1+ 2++ 2++ 2++ 2++ 2++ 2++ 3+

120 123 123 125 128 131 221 227 281 287 293 299 305 311 202 205

120 123 123 125 128 131 145 149 175 179 183 187 190 194 178 181

–

238 242

–

238 242

–

481 491 492 502 512 522 733 753 911 931 951 971 991 1011 1235 1255

Size

Frame

Total kg

124 124 141 141 144 144 171 171 174 174 204 204 244 244 294 294

208 211 242 247 247 251 246 251 252 256 278 283 352 356 354 358

184 186 162 165 165 168 184 187 188 191 206 209 295 298 299 302

246 249 227 232 232 236 256 261 262 267 288 292 346 350 359 363

246 249 227 232 232 236 256 261 262 267 288 292 346 350 360 364

–

162 165 165 168 184 187 188 191 206 209 260 263 263 266

–

162 165 165 168 184 187 188 191 206 209 260 263 263 266

1275 1295 1588 1618 1618 1648 1740 1770 1780 1810 1955 1985 2504 2534 2551 2580

5.3.2.2 Hydronic modules weights
C WARNING
The modules weight values must be added to the standard weight values of the standard version.

» C – 1 pump version weight distribution

CS-CL

Size

30-35

Frame

–

Total

CS-CL
61-62
1+ 29 29 29 29 116

CS-CL
81-82-101-102104 2++ 36 36 36 36 143

CS-CL
121-122-124
3+ 0 0 24 24 24 24 32 32 159

CS-CL
141-142-144171-172-174
4 0 0 27 27 27 27 35 35 177

CS-CL
204
5 0 0 28 28 28 28 37 37 186

CS-CL
244-294
6 0 0 31 31 31 31 31 31 186

EHA | USER MANUAL

» C – 1 pump version weight distribution with full inertial tank

CS-CL

Size

30-35

61-62

81-82-101-102104

121-122-124

Frame

2++

102

–

118

–

118

Total

220

337

408

591

CS-CL
141-142-144171-172-174
4 0 0 115 115 115 115 154 154 768

CS-CL
204
5 0 0 127 127 127 127 170 170 849

» C – 2 pumps version weight distribution

CS-CL

Size

30-35

Frame

n.a.

Total

n.a.

CS-CL
61-62
1+ 39 39 39 39 154

CS-CL
81-82-101-102104 2++ 48 48 48 48 190

CS-CL
121-122-124
3+ 0 0 32 32 32 32 42 42 212

CS-CL
141-142-144171-172-174
4 0 0 35 35 35 35 47 47 236

CS-CL
204
5 0 0 37 37 37 37 50 50 248

» C – 2 pumps version weight distribution with full inertial tank

CS-CL

Size Frame

30-35 0

61-62 1+

81-82-101-102104
2++

121-122-124 3+

n.a.

101

125

n.a.

101

125

n.a.

101

125

102

n.a.

101

125

102

n.a.

–

102

n.a.

–

102

n.a.

–

136

n.a.

–

136

Total

n.a.

402

500

680

CS-CL
141-142-144171-172-174
4 0 0 131 131 131 131 175 175 875

CS-CL
204
5 0 0 143 143 143 143 190 190 950

CS-CL
244-294 6 0 0 169 169 169 169 169 169
1014
CS-CL
244-294 6 0 0 41 41 41 41 41 41 248
CS-CL
244-294 6 0 0 186 186 186 186 186 186
1115

EHA | HF61GJ0349G

» H – 1 pump version weight distribution

HS-HL

Size

30-35

Frame

–

Total

HS-HL
61-62
1+ 29 29 29 29 116

HS-HL
82-102-104
2++ 36 36 36 36 143

HS-HL
122-124
3+ 0 0 24 24 24 24 32 32 159

HS-HL
142-144-172174 4 0 0 27 27 27 27 35 35 177

HS-HL
204
5 0 0 28 28 28 28 37 37 186

» H – 1 pump version weight distribution with full inertial tank

HS-HL

Size

30-35

61-62

82-102-104

Frame

Total

2++

102

–

220

337

408

HS-HL
122-124
3+ 0 0 89 89 89 89 118 118 591

HS-HL
142-144-172174 4 0 0 115 115 115 115 154 154 768

HS-HL
204
5 0 0 127 127 127 127 170 170 849

» H – 2 pumps version weight distribution

HS-HL

Size

30-35

Frame

n.a.

Total

n.a.

HS-HL
61-62
1+ 39 39 39 39 154

HS-HL
82-102-104
2++ 48 48 48 48 190

HS-HL
122-124
3+ 0 0 32 32 32 32 42 42 212

HS-HL
142-144-172174 4 0 0 35 35 35 35 47 47 236

HS-HL
204
5 0 0 37 37 37 37 50 50 248

HS-HL
244-294 6 0 0 31 31 31 31 31 31 186
HS-HL
244-294 6 0 0 169 169 169 169 169 169
1014
HS-HL
244-294 6 0 0 41 41 41 41 41 41 248

EHA | USER MANUAL

» H – 2 pumps version weight distribution with full inertial tank

HS-HL

Size

30-35

61-62

82-102-104

Frame

Total

2++

n.a.

101

125

n.a.

101

125

n.a.

101

125

n.a.

101

125

n.a.

–

n.a.

–

n.a.

–

n.a.

–

n.a.

402

500

HS-HL
122-124
3+ 0 0 102 102 102 102 136 136 680

HS-HL
142-144-172174 4 0 0 131 131 131 131 175 175 875

HS-HL
204
5 0 0 143 143 143 143 190 190 950

» F – 1 pump version weight distribution

Size
Frame L1 L2 L3 L4 L5 L6 L7 L8 Total

FS-FL

25-30-35

–

FS-FL
61
1+ 29 29 29 29 116

FS-FL
81-101-104
2++ 37 37 37 37 148

FS-FL
121-124
3+ 8 8 36 36 36 36 159

FS-FL
141-144-171174 4 0 0 25 25 25 25 33 33 165

FS-FL
204
5 0 0 27 27 27 27 35 35 177

» F – 1 pump version weight distribution with full inertial tank

Size
Frame L1 L2 L3 L4 L5 L6 L7 L8 Total

FS-FL

25-30-35

81-101-104

2++

–

220

337

352

FS-FL
121-124
3+ 26 26 117 117 117 117 521

FS-FL
141-144-171174 4 0 0 117 117 117 117 156 156 780

FS-FL
204
5 0 0 122 122 122 122 163 163 816

HS-HL
244-294 6 0 0 186 186 186 186 186 186
1115
FS-FL
244-294 6 0 0 31 31 31 31 31 31 186
FS-FL
244-294 6 0 0 169 169 169 169 169 169
1014

EHA | HF61GJ0349G

» F – 2 pumps version weight distribution

Size
Frame L1 L2 L3 L4 L5 L6 L7 L8 Total

FS-FL

25-30-35

n.a.

FS-FL
61
1+ 39 39 39 39 154

FS-FL
81-101-104
2++ 49 49 49 49 197

FS-FL
121-124
3+ 11 11 48 48 48 48 212

FS-FL
141-144-171174 4 0 0 33 33 33 33 44 44 220

FS-FL
204
5 0 0 35 35 35 35 47 47 236

» F – 2 pumps version weight distribution with full inertial tank

Size
Frame L1 L2 L3 L4 L5 L6 L7 L8 Total

FS-FL

25-30-35

81-101-104

2++

n.a.

101

113

n.a.

101

113

n.a.

101

113

n.a.

101

113

n.a.

–

n.a.

–

n.a.

–

n.a.

–

n.a.

402

450

FS-FL
121-124
3+ 32 32 142 142 142 142 630

FS-FL
141-144-171174 4 0 0 131 131 131 131 175 175 875

FS-FL
204
5 0 0 136 136 136 136 182 182 908

FS-FL
244-294 6 0 0 41 41 41 41 41 41 248
FS-FL
244-294 6 0 0 186 186 186 186 186 186
1115

5.4 Unpacking

5.5 Siting and dampers

The unit packaging must be carefully removed avoiding possible damage to the machine; the materials that make up the packaging are of a different kinds: wood, cardboard, nylon, etc. It is good practice to collect them separately and deliver them for disposal or recycling to specialised disposal companies – thus reducing their environmental impact.
B ATTENTION
If the unit is equipped with (a) pump(s) and/or a tank, the expansion tank will be packed inside it, to be fixed to the suction line of the pump where a sealed “Tee” junction is provided, or on the tank itself. remove the cap and tighten the expansion tank (this should be performed by qualified personnel), and check the pre-charge pressure (0.5/1.0 bar) before filling the water circuit and starting the machine. The size of the expansion tank depends on the water content of the system as well as on its temperature range; always check the capacity of the tank in relation to the water content of the system.

It is advisable to pay attention to the following points to determine the best site where to install the unit and the relative
connections: size and origin of water pipes; power supply location; accessibility for maintenance or repairs; solidity of the supporting surface adequate ventilation of the area (taking into account the
maximum permitted ambient temperature);
application limits of the unit (see chapters 3.1 Scope of application p. 8 and 8.2 Operating limits p. 42).
It is good practice create a support slab of dimensions suitable for those of the unit. This precaution is essential when you want to place the unit on unstable ground (gardens, etc.). It is advisable to place a rigid rubber strip between the base frame and the support surface or, if more thorough insulation is required, it is advisable to use spring type anti-vibration mounts.

EHA | USER MANUAL

» Support structure

Frame 0 1+ 2++ 3+ 4 5 6

Rubber anti-vibration mount BUFFER TYPE D 60-95 BUFFER TYPE D 60-95 BUFFER TYPE D 60-95 BUFFER TYPE D 60-95 BUFFER TYPE D 60-95 BUFFER TYPE D 60-95 BSB 150 50°SH

The following paragraph describes in detail the properties of the anti- vibration devices mentioned above. For the exact position of each foot, refer to the attached dimension drawing.
3
FRAME 1-5
1
A C

1 Base rubber or spring anti vibration dampers. 2 The support feet of the structure must correspond to the
positioning of the machine support points in order to discharge the weight directly to the ground without creating structural tensions which could then be reflected on the copper pipes of the machine. 3 The vibration dampers must be positioned aligned with the support points identified on the machine (refer to the attached dimensional diagram).
If the machine is installed on a dedicated support structure, take into account the diagram for positioning the machine’s support points. In order to avoid problems during machine operation, is recommended send in advance the drawing and structural calculations of the support structure to the technical department for approval. In the case of installation on roofs or intermediate storeys, the unit and pipes must be insulated from walls and ceilings by placing rigid rubber joints in between and using supports that are not rigidly anchored to the walls. If the unit is to be installed in proximity to private offices, bedrooms or areas where noise levels must be kept down, it is advisable to conduct a thorough analysis of the sound field generated and verify its compatibility with the local laws in force.
5.5.1 Anti-vibration rubber devices
The units eHa can be equipped with spring-type anti-vibration rubber mounts. The following table provides a summary of rubber anti-vibration elements adopted for this series, depending on the frame. The machine is guaranteed to work with the vibration dampers supplied with it and positioned according to the machine diagram (attached). If vibration dampers other than those supplied are used, without the manufacturer’s authorisation, the guarantee on noise, vibrations and any breakages deriving from the same will expire.

SECTION A-A

CODE
A B C H MAX LOAD f

D 60-95 (Frame 0)

D 60-95 (Frame 1-5)

M-10

M-16

daN

450

1200

The values shown are approximate figures only – due to elastomer hardness tolerance range and other factors; they can be reassessed in case of actual need.

FRAME 6 Frame 6: BSB150 for 50° Shore hardness

F B

A C
E
SECTION A-A

BSB 60

BSB 80

BSB 95

BSB 110

BSB 125

BSB 150

The values shown are approximate figures only – due to elastomer hardness tolerance range and other factors; they can be reassessed in case of actual need.

EHA | HF61GJ0349G

EHA | USER MANUAL

» OWN FREQUENCIES Type BSB

5000 4000 3500 3000 2500 2000
1500
1000 800 700 600 500
Y 400
300 250 200 180 160 140 120 100
80

BSB

BSB 220 60

220 70

BBBSSSBBBB12B1S52S600B0BB244124S0018B00B50S0514B05B20051S6B4B00S1B5B5BBS00SSB1B6B61001816062005570500BSBBSB1BS5B1081701006050BBSSBB12158B0S6BBB07SS0BB

125 110

BSB

80 70

70 60

BSB

110

60 70 BSB 40 95

BSBBS8B0965060

BSB 60
BSB

BSB BSB 80650060 50

110 70 BSB

80 40

BSB

60 40

30 25
20 6

9 10 11 12

16 18 20

own frequency Hz

load (kg)

EHA | HF61GJ0349G

» LOAD-DEFLECTION CURVES Type BSB
5000 4000 3500 3000 2500 2000
1500
1000 800 700 600 500
Y 400
300 250 200 180 160 140 120 100
80 70 60 50 40
30 25 20
1

bending (mm)

load (kg)

BSB

220

70 220

BBSSBBB89S05BBS670B08=01B51SB00BBSB79SB0BSB5BB1BSSS518BBB0100B2699S6750550B07646B0B6000S0SBB7011110B04S50B0B1BS2SB5BBBS16S18B0B8010712B6055S00B5B7S0B01BBS2S1B5BB5BS41S0B0B16BBS660S10B10B66BBB8SB14000SSB80BS7BBS40B01B021561250205002050540500400

BSB 80 40 BSB 60 50

60 40 BSB

5 6 7 8 10

EHA | USER MANUAL

5.5.2 Anti-vibration spring devices The eHa units can be equipped with the spring-type anti-vibration devices shown below.
M10

FRAME 6

» Anti-vibration mount: EMCV47

K = 25,0 kg/mm

fo = 3,53 Hz

B 30

2 1

Ø 74

118

0 OS

load (kg)

deflection (mm)

anti-vibration rigidity

own frequency max recommended load pack spring

0 27 55 82 110 137 165 192 220 247 275 302 330 357 385 412 440 467 495 522 550 577 605 632 660 687 714 742

5.6 Installation clearance

requirements

128

The following table provides a summary of the spring anti-vibration mounts adopted for this series, depending on the frame.

Frame 0 1+ 2++ 3+ 4 5 6

Spring anti-vibration device EMCV 305 EMCV 305 EMCV 305 EMCV 305 EMCV 305 EMCV 305 EMCV47

The following paragraph describes in detail the properties of the anti- vibration devices mentioned above. For the exact position of each foot, refer to the attached dimension drawing.

FRAME 1-5

» Anti-vibration mount: EMCV305

K = 16,5 kg/mm

fo = 3,35 Hz

B 30

2 1

521

0 OS

180

160

140

120

100

load (kg)

deflection (mm)

anti-vibration rigidity

200

220

240

261

281

301

321

341

361

381

own frequency

max recommended load

pack spring

401

421

441

461

481

501

You should bear in mind the following aspects when choosing the best site for installing the unit and the relative con-
nections: size and origin of water pipes; power supply location; accessibility for maintenance or repairs; solidity of the supporting surface ventilation of the air-cooled condenser and necessary
clearance;
dominant wind direction: avoid positioning the unit in such a way that the prevailing winds cause the recirculation of air to the condensing coils; a speed of 8 m/s (28.8 km/h) is enough to produce a sufficient stagnation pressure to guarantee about 60% of the rated airflow. (For situations where the wind action is unavoidable and there is a simultaneous presence of temperatures below -5°C, condensation control for low outdoor temperatures must
necessarily be of the condenser exchanger flooding or throttling type- Please contact the design department for details); possible reverberation of sound waves. all models of the series are designed and built for outdoor
installations: avoid covering with canopies or positioning close to trees (even if only partially covering the unit) – which might obstruct regular ventilation of the unit condenser. It is a good idea to provide a supporting base of adequate dimensions. This precaution becomes an imperative when the unit is to be sited on unstable ground (various types of soil, gardens, etc.) È consigliabile interporre tra il telaio di base ed il piano di appoggio un nastro di gomma rigido. Qualora si necessitasse di un isolamento più spinto è opportuno l’impiego di supporti antivibranti a molla.
In the event of installation on roofs or middle floors, the unit and the pipes must be insulated from walls and ceilings by interposing rubber joints and supports without rigid links to
the walls. In case of installations near offices, bedrooms or areas where low noise emissions are required, it is advisable to carry out an in-depth analysis of the generated sound

field and to check its compatibility with the applicable laws in force locally. It is of critical importance to ensure an adequate volume of air at both the intake and the delivery ends of the finned condensing/evaporating coils and it is very important to avoid recirculation between intake and delivery, which might affect the unit performance or even disrupt normal operation. In this respect, it is necessary to ensure the following working space requirements (refer to the figure on the page): rear side/hydraulic connections: min. 1.0 metres to en-
sure accessibility for hydraulic connections and/or any maintenance required for to the pump assembly, tank, expansion vessel and flow switch. Control panel side: min. 1.0 metres to ensure accessibility for inspection and/or maintenance of refrigeration components. Finned pack exchangers side: min. 1.5 m in case of open space units, for unhinde-
red air circulation and to guarantee lateral accessibility to the compressor compartment, too; min. 2 m in the case of units surrounded by walls or obstacles of the same height as the unit, to ensure unhindered air circulation (fig. a); min. 2.5 m in the case of units surrounded by walls or obstacles taller than the unit, to ensure unhindered air circulation (fig. b); min 3 m in case of several units arranged in parallel, to ensure unhindered air circulation (fig. c). Top side: there must not be any obstacle to exhaust.
» View from above
1.5 m

1 m

1.5 m

EHA | HF61GJ0349G

» Front view (electrical control panel side)

EHA | USER MANUAL

2 m

2.5 m

a) 3 m

b) 3 m

A DANGER
During normal operation, human traffic in the area around the machine must be prevented up to at least the required buffer spaces.

EHA | HF61GJ0349G

6 PLUMBING AND ELECTRICAL CONNECTIONS

6.1 Hydraulic connections
This paragraph provides the necessary instructions that must be followed for a correct hydraulic connection of the unit.
B ATTENTION
All operations must be performed EXCLUSIVELY BY QUALIFIeD PersOnnel, in compliance with the regulations applicable in the country of installation.
C WARNING
In any case, please also refer to the document “First start up instructions”, supplied with the unit.
C WARNING
It is mandatory to install a metal mesh filter on the inlet pipe with a recommended 1 mm mesh size, to protect the exchanger from residues or impurities in the pipes. If the machine works in combination with process cycles, it is advisable to install an inspectable uncoupling exchanger, in order to avoid possible lockups and/or breaks of the plate heat exchanger. note that the units are designed to operate in a closed hydraulic circuit. In the case of open tanks, it is advisable to contact the design department which will indicate the best solution to adopt, such as uncoupling the exchanger.
6.1.1 General guidelines for plumbing connections
When preparing the hydraulic circuit for plate heat exchangers, it is highly recommended to follow the instructions given below, and in any case, comply with national or local regulations (refer to the diagrams included in the manual). 1. Connect the pipes to the chiller using flexible couplings
to prevent the transmission of vibrations and to compensate for thermal expansions. These units are all configured for installation of the water inlet-outlet pipes outside the unit (on the rear) and these pipes are supplied as standard accessories at no extra cost for the customer. 2. Install the following components on the piping: pair of quick couplings with welded socket (optional
– selectable from price list). They make system connection operations easier and the installation tasks very quick; temperature and pressure indicators for routine group maintenance and inspections. Pressure monitoring on water side allows the efficiency of the expansion tank – if any – to be ensured, alerting to any system water leaks early on. N.B.: check that the water pressure on the suction side of the pump is at least 0.6 bar; otherwise, the storage tank could be damaged. sumps on the inlet and outlet pipes for temperature measurements through direct viewing of the operating temperatures. They can, however, be checked by means of the on-board microprocessor;

shut-off valves (gate valves) to isolate the unit from the hydraulic circuit;
vent valves, to be located in the highest parts of the hydraulic circuit, to allow for air bleeding. On the internal machine pipes there are smaller vent valves for on-board machine air bleeding: this operation must exclusively be carried out with no electric power supply to the group. especially as far as the FreeCooling versions are concerned, make sure that the circuit is completely filled with water, then bleed the air from the water heat exchangers in order to avoid pump cavitation.
Outlet tap and, where necessary, draining tank to allow the system to be emptied for maintenance operations or seasonal breaks. (a 1″ drain tap is provided on the optional storage tank: this operation must be carried out with no electric power supply to the group).
C WARNING
On Free-cooling versions it is mandatory to use glycol solutions (max 40% in weight) in order to prevent hard-to repair damage to the finned heat exchanger caused by frosting. Carefully evaluate the minimum air temperatures to which the unit can be exposed and define the percentage of anti-freezing agent to be added accordingly.
B ATTENTION
Failure to use anti-freezing solutions can cause serious damage to the free- cooling exchangers and to the hydraulic/refrigeration circuit in general.
C WARNING
If the unit is intended for the production of domestic hot water, the use of an uncoupling exchanger between the unit’s hydraulic circuit and the domestic hot water circuit is mandatory.
» Quick couplings (optional)
6.1.2 Recommended water circuit
B ATTENTION
During hydraulic connection operations, never work with naked flames near or inside the unit.

EHA | USER MANUAL

The recommended hydraulic circuit is shown in figure 6.2 Recommended water circuit p. 35. It is equipped with: valves for regulating (VI) the unit on the water pipes, im-
mediately upstream and downstream from the unit itself, to be used in the event maintenance work is required; a mechanical filter (F) (MANDATORY!) on the pipe at machine inlet next to it;
a mechanical filter (F) (MANDATORY!) and a check valve (VR), on the supply line upstream from the filling tap (RC);
an air vent in the highest point of the installation, to allow for air bleeding;
safety valve conveyor pipe (VS), which, if the valve is opened, directs the water jet to areas where it cannot
damage people or property (Important!); anti-vibration joints (AV) on the pipes to prevent vibration
transmission to the system.

B ATTENTION
Regarding the choice of mechanical filters, the degree of filtration adopted, expressed as “maximum particle size” (mm), is 0.9 mm for all sizes. It is a good rule for the pipes departing from and returning to the unit not have a smaller diameter than the unit hydraulic connections’. During the winter it is necessary to empty the system (or the chiller only) to avoid damage caused by freezing; alternatively, load the system with a mixture of water and glycol in adequate percentages, chosen according to the lowest expected temperature (see 8.3 Thermal carrying fluid p. 44).
B ATTENTION
In case an anti-freezing agent of a different type must be used, please contact the office. Failure to install filters and anti-vibration mounts can cause obstruction, breakage and noise problems for which the manufacturer may not be held responsible.

» Recommended water circuit

TW MA F

VA SIA

VE VI

VI AV

TW MA

SFA SA

Evaporator

Flow switch

Membrane expansion tank

Manual air vent

sIa Inertial storage tank

Draining tap

Filling cock

Shut-off valve

Check valve

Circulation pump

Anti-vibration mount

Metal filter

Spring safety valve

Filling group

air separator

TW Water temperature detection trap

Ma Pressure gauge

EHA | HF61GJ0349G

6.1.3 Metal mesh filter

Efficiency pack 0 EHA025 EHA030 EHA035C

Efficiency pack 1 EHA061

EHA081

EHA101

EHA121

EHA141

EHA171

Efficiency pack 2
EHA062 EHA082 EHA102 EHA122 EHA142 EHA172

Efficiency Pack 3
EHA104 EHA124 EHA144 EHA174 EHA204 EHA244 EHA294

Approximate cooling capacity [kW] 19,5 30,1 39,1 57,6 57,6 75,7 76,5 98,1 98,8 102 124 127 126 147 148 157 167 167 170 201 255 283

Filter size 1″1/2 GAS 1″1/2 GAS 1″1/2 GAS
2″ GAS 2″ GAS 2″ GAS 2″ GAS 2″ GAS 2″ GAS 2″ GAS 2″ GAS 2″ GAS 2″ GAS 3″ GAS 3″ GAS 3″ GAS 3″ GAS 3″ GAS 3″ GAS 4″ FLANGED 4″ FLANGED 4″ FLANGED

6.1.3.1 Metal mesh filter in brass
L
R H

Body (from 1″1/4 up to 3″): Brass Delta C EN1982 CB 754s
Sand blast finishing Betaflex 71 body gasket Threading to IsO 228/1
Rhomboidal flattened sheet stainless steel AISI 304 strainer

Nominal diameter
Holes pitch Inscribed hole diameter Holes per cm² Holes percentage on total surface

10-1520-25 1,5 mm 400 µm 150 38%

32-40-50
2 mm 500 µm
80 48%

65-80
2,5 mm 600 µm
53 50%

Leading dimensions (table 1/2)

R”

1/4

3/8

1/2

3/4

OS
Decree law 25/02/2000 n°93 The product showed in this technical sheet is made according to PeD 2014/68/Ue and it is Ce marking-free as per article 3 paragraph 3. Features: Body (from 1/4″ up to 1″) and cap: Brass CW 617N UNI
EN 12165

EHA | USER MANUAL

6.1.3.2 Metal mesh filter in cast iron
L S

ØD 01

ØF ØE
03 02
ØG

06
H
04 HG 05

6.1.4 Flow switch installation
Units EHA from frame 1 to frame 6 feature a flow switch for controlling the water flow as part of the standard equipment. For subsequent frames, the flow switch is supplied as standard, pre-mounted on a suitable steel pipe, and must be installed on the machine. The pipe has a minimum length suitable for guaranteeing the correct distance from curved pipe sections in the system. Please refer to the dimensional drawing. a horizontal arrangement of the pipe on which it is mounted is mandatory, to avoid mishaps. To install the flow switch: connect the pipe, by means of a vic-taulic coupling, to the
unit inlet connector; wire the flow switch to the electrical panel as indicated in
the wiring diagram. It is critically important to connect the socket with the flow switch as required to the connector marked “Water inlet”.

6.1.5 Hydraulic connection to the plate heat exchanger

Cast iron strainer in GG25 Flanged Pn16 according to en1092-2 (ex DIn2533) lengths according to en558-1 series 1 (ex DIn3202 F1)
Epoxy coating (min. 200m) steel strainer in ss304 with round holes mesh
Hole diameter 1,5mm up to DN150, 2,0mm above With threaded drain (from 1/2″ to 1″ depending on the sizes) Tr CU 010 compliant GOsT compliant Optional Wras compliant version available (Dn32-Dn500)
Working conditions: water, from 0°C to +120°C

Part List

Component

Material

Body

Cast Iron

Drain cap

Cast Iron

Bonnet

Cast Iron

Gasket

Graphite

Nuts

Carbon steel

Filter

Stainless steel

Norm GG25 GG25 GG25
A3 SS304

Dimensions

ØF ØE S NxØD L H HG ØG (mm) (mm) (mm) (mm) (mm) (mm) (mm) (mm)

Weight (kg)

032 140 100 18 4×18 180 111 90 37

6,2

040 150 110 18 4×18 200 128 100 44

7,5

050 165 125 18 4×18 230 140 120 54 10,8

065 185 145 18 4×18 290 161 130 68 15,5

080 200 160 20 8×18 310 187 150 88 20,2

100 220 180 20 8×18 350 215 175 106 26,8

125 250 210 22 8×18 400 249 200 133 37,1

150 285 240 22 8×23 480 292 235 158 56,1

200 340 295 24 12×23 600 361 290 208 90,6

250 405 355 30 12×27 730 429 345 258 144,0

300 460 410 30 12×27 850 492 400 308 185,0

350 520 470 36 16×27 980 595 492 342 294,0

400 580 525 38 16×30 1100 673 552 412 388,0

B ATTENTION
It is critically important that water inlet occurs at the connection marked with the words “Water Inlet”.
Otherwise, there would be a risk of freezing the plate heat exchanger, since there would be no control by the antifreeze thermostat and the countercurrent circuit operation requirement during cooling would not be met – with added risks of malfunctioning. The dimensions and the position of the hydraulic connections are shown in the assembly drawings of this manual and of the attached documents.
B ATTENTION
The hydraulic circuit must be designed in such a way as to guarantee the consistency of the rate water flow (+/15%) to the exchanger in all operating conditions.
On the units eHa a device is provided for controlling the water flow (paddle type flow switch) on the hydraulic circuit, in the immediate vicinity of the plate heat exchanger. If this device is tampered with, the guarantee is no longer valid.
It is strongly recommended to install a safety valve on the hydraulic circuit (already installed if there is an expansion tank). In case of severe system faults (e.g. fire) it will allow the system to be drained, avoiding possible explosions. always connect the outlet to a pipe with a diameter not smaller than that of the valve opening, and direct it to areas where the jet is not likely to harm people. For units equipped with an (optional) storage tank or pump kit(s), it is part of the standard equipment.
A DANGER
During hydraulic connection operations, never work with naked flames near or inside the unit.
The compressors’ action is intermittent, as the refrigeration requirements of the user may not match the supply from the unit. In systems with a low water content, where the water thermal inertia effect is less sensitive, it is advisable to check that the water content of the delivery section to the users matches the following ratio:

EHA | HF61GJ0349G

Cc x V =
x Sh x T x Ns

water content in the user section [m3]

Sh fluid specific heat [J/(kg/°C)]

fluid density [kg/m3]

minimum time between 2 restarts of the compressors [s]

T permitted waterT differential [°C]

Cc refrigerating power [W]

Ns No. of partial loading steps

Regardless of their configuration, all the groups have a single external hydraulic connection (inlet + outlet). This is an important factor which shortens on-site connection times.
Normally, each group is provided with a flow switch which immediately stops the group in case of faults, thus preventing the plate heat exchanger from freezing or being damaged. a water temperature probe is also provided on the outlet side of the plate heat exchanger, which is connected to the antifreeze thermostat. For all groups there are options that allow various configurations to be created with: single or double pumps for applications at -10°C and with
maximum 40% ethylene and propylene glycol (available for applications with > 40% glycol on request, by contacting the design department); storage tank at the hydraulic circuit outlet end. This system facilitates the balancing of the inevitable tempera-
ture fluctuations following compressors on/off. The following figure shows the integrated and balanced effect of the storage tank. Its function helps ensure accurate temperature control according to the environmental parameters of the connected groups.

Inlet water T

Buffer tank

Outlet water T

6.1.6 Tank filling mode
B ATTENTION
The tank, if present, is not designed to withstand a negative pressure greater than -0.15 bar. For this reason, make sure that the suction pressure of the pump, where the expansion tank is positioned, is always greater than 0.5 bar with the pump running: this also helps reduce the risk of pump cavitation. It is essential that the installer follows and verifies point by point the procedure indicated below, to prevent any risk of implosion of the tank or cavitation in the pump: A. Drain the expansion tank until pressure is 0.5 bar B. Charge the system and pressurise it up to about + 1 bar
at the pump suction end (pump not running) C. Vent the system D. Check the pump suction pressure (about 1 bar) and start
the system E. stop the pump after 15-30 minutes and repeat from point
c) until there are no more noises caused by air in the system.

6.1.7 Filling the system
Before you start filling, make sure that the system draining tap is closed.
Open all the air vent valves of the system and of the indoor units and chiller.
Open the system regulating devices.
To fill the circuit open slowly the water tap of the system (optional).
When water starts coming out of the air vent valves of
the indoor units, close them and continue filling until the pressure gauge reading is 1.5 bars. The quality and chemical composition of the cooling and
heat transfer medium have a great influence on the Lifetime and on heat transfer and thus on the performance of the eHa.
Basically, all types of Avoid floating matter in the cooling and heat transfer medium. When the suspended matter accumulates in the heat exchanger the heat transfer and thus the performance of the eHa deteriorate. Below are the values of the dissolved substances and the water properties recommended by the manufacturer listed. The information refers to the use of exchangers made of copper, aIsI 304 or aIsI 316. If the concentration of some components will be out of range, the customer has to introduce a correction, otherwise the system will be out of warranty.

WATER CONTENT

CONCENTRATION

Alkalinity (HCO3-) Sulphate (SO42-) HCO3- / SO42-

70 – 300 ppm < 70 ppm > 1.0 ppm

Electrical conductivity

10 – 500 S/cm

pH*

7.5 – 9.0

Ammonium (NH4+) Chloride (Cl-)

< 2 ppm < 30 ppm

Free chlorine (Cl2) Hydrogen sulphide (H2S)

< 0.5 ppm < 0.05 ppm

Carbon dioxide (CO2)

< 5 ppm

Total hardness (°dH)

4.5 – 8.5

Nitrate (NO3-)

< 100 ppm

Iron (Fe)**

< 0.2 ppm

Aluminium (Al)

< 0.2 ppm

Manganese (Mn)**

< 0.05 ppm

Calcium carbonate (CaCO3) Phosphate (PO43-)

< 200 ppm < 2 ppm

Ammonia (NH3)

< 0.5 ppm

Temperature (°C)

< 65 °C

Oxygen content

< 0.1 ppm

*Generally a low pH value (less than 6) increases the risk of corrosion and a high
pH (above 7.5) decreases the risk of corrosion **Fe3+ and Mn4+ are powerful oxidants and may increase the risk of localized
corrosion on stainless steel

6.2 Electrical connections
Before carrying out any operation on electrical parts, make sure that there is no applied voltage.

EHA | USER MANUAL

C WARNING
All operations must be performed by qualified personnel, in compliance with the regulations applicable in the country of installation. For any electrical intervention, please refer to the information shown on the wiring diagram attached to the unit.
B ATTENTION
Check that the mains voltage matches the unit rated data (voltage, phase number, frequency) stated on the data plate on the machine. The input voltage must not undergo fluctuations greater than ± 5% and the unbalance between individual phase voltage values must always be below 2%.
C WARNING
Operation must occur within the above voltage value range, otherwise, the guarantee will no longer be valid.
B ATTENTION
It is the installer’s responsibility to choose the power connection cable and to dimension the line protection systems on the basis of the electrical data declared in the silver label and in the wiring diagram supplied, in compliance with the regulations applicable in the country of installation. The wiring diagram shows the data and minimum requirements that may help the installer select a cable and carry out correct dimensioning of the protection devices.
B ATTENTION
no provisional supply or site supplies are allowed, subject to the immediate loss of validity of the guarantee.
The electrical control panel is designed and wired according to the declaration of conformity enclosed with the unit, completed in accordance with the regulations in force in the country of installation. To access the electrical control panel and its components, it is necessary to open the external panel provided with pneumatic lifting pistons that keep it in its locked position. However, before opening the unit, disconnect it from the power supply by turning the red main disconnector switch. all remote and auxiliary controls have 24V voltage supplied by an insulating transformer located in the electrical control panel. The position of the general disconnector has been chosen in order to facilitate wiring operations locally and avoid difficulties in leading the wires through and routing 3+1 power cables. all components are protected against overload and short circuits. an optional factory setting for automatic thermal protections for all loads can be selected. In any case, thermal protection consisting of a set of thermal sensors in a chain configuration on all connected electric motors is provided as standard. In addition, the compressors are controlled by their respective on-board electronics that also control the oil and phase sequence alarms. all the devices are usually provided with a general phase sequence relay which, in addition to ensuring internal protection, also ensures the correct operation of the compressor(s) when the correct phase indications are not observed. The degree of protection of the electrical panel is IP44 and when the electrical panel is open it still meets IP20 protection

class requirements, thanks to the plastic cover on the front of the electrical distribution panel. The preliminary checks and the electrical connections to be made are as follows (refer also to the document “First start up instructions”, supplied with the unit): Open the main disconnecting switch. Insert the power cable through the special hole provided
on the left side of the unit (by first removing and drilling the square plate according to the diameter of the electric cable) and lock it with a cable gland. Connect the power supply and the earth cable to the terminals of the main disconnector switch. Open the protections of the installed compressors to prevent that, in case of a wrong phase sequence, they start in the wrong direction. apply voltage by turning the main switch to On. Check the correct l1 – l2 – l3 direction of the phase wires by checking on the phase sequence relay that the green indicator lights up for voltage presence and also the yellow one for the correct sequence; if this does not happen, disconnect power supply to the machine on the external distribution panel, exchange two phase wires and repeat the operation. In nO Case sHOUlD THe WIrInG DOWnsTreaM FrOM THe GeneraTOr Be alTereD, because doing so could jeopardize the correct sequence of other devices, for example the pump(s). Close the compressor protections. Close the control panel. earthing is mandatory by law. The installer must provide for the connection of the earthing cable (yellow-green cable) to the special earth terminal located in the electrical control panel. Power supply to the control circuit is derived from the power line via an insulation transformer located in the electrical control panel. The control circuit is protected by special fuses or magnetothermal switches. all the units are usually equipped with a phase sequence relay which ensures the correct phase sequence, necessary for the machine to be fully functioning before allowing the compressor(s) to start.
B ATTENTION
In the event of units equipped with an inverter, as regards the differential electrical protection to be installed upstream, it is necessary to use a type B circuit-breaker that is sensitive to impulsive and direct currents. It is preferable that it has the following characteristics: adjustable activation threshold, with a minimum activa-
tion threshold of 0.3 a and maximum activation threshold depending on the type and number of inverters and other components installed in the unit; adjustable operation delay; dedicated switch for the heat pump only. The differential protection adjustment must be compatible with the type of inverter used and obviously, comply with the legal provisions in force in the country of installation. It will therefore be necessary, during installation, to check the suitability of the room and the installation setting; any liability for non-compliance may not be attributed to the heat pump/chiller manufacturer. as far as the main isolating circuit breaker is concerned, an input voltage automatic switching system is provided,

EHA | HF61GJ0349G

padlockable in the OFF position to allow for maintenance, but no external disconnecting operations are required. If an emergency disconnection system is deemed necessary, it must be set up externally during installation. This must be provided by the installer. The short-circuit current is assumed to be Icc = 6 ka. If Icc is higher at the point of installation, the installer is requested to provide an adequate circuit breaker system. In any case, refer to the laws and regulations in force in the country of installation.

6.4 Hydraulic and refrigeration diagrams
To view the hydraulic and refrigeration diagrams, please refer to the documentation supplied with the unit.

6.2.1 Electrical wiring of the circulation pump
For all units of series eHa, the pump kits, if selected during the ordering phase, are pre-wired. For the double pump kits, whether in the “anD” or “Or” versions, the rotation is managed on a time/fault basis.
C WARNING
The pump must be started before the chiller starts and stopped after the chiller has stopped (recommended minimum delay: 60 seconds.) If available as an option on the machine, this function is already carried out by the on-board microprocessor.

6.2.2 External enabling controls
If you wish to perform remote On-OFF controlling of the unit, it is necessary to remove the jumper between the contacts shown on the wiring diagram and connect external enabling to these same terminals (refer to the attached wiring diagram). The subsequent enabling of the “reMOTe” function via the switch in the electrical panel is only possible if a basic type microprocessor control is used. If the unit can be used in both the cooling and the heating modes, to carry out remote switching between summer and winter modes it is necessary to remove the jumper between the contacts shown on the wiring diagram and connect external enabling to these same terminals (refer to the attached wiring diagram). The switching modes are different as a function of changes in the microprocessor control – which can be of a basic or an advanced type: detailed instructions are given in the microprocessor user manual, which is an integral part of the documentation supplied.
C WARNING
All external controls and enabling signals at very low 24 Vac voltage are supplied by the insulation transformer available on the control panel.

6.3 Electrical data

For the electrical data of each specific configuration, refer to the silver plate on the unit and to the wiring diagram supplied. Please be reminded that the electrical components of the unit are dimensioned according to electrical absorption at maximum system PS, i.e. the maximum admissible pressure (or design pressure) for which the unit was designed. This also includes safety accessories and electrical cables.

7 MICROPROCESSOR CONTROL
C WARNING
To obtain access to all the information related to unit switching on and off, its use, the setting of the working set-point, the display of the alarms and all the parameters related to microprocessor control, possibly linked to customer specifications details, please refer to the dedicated “Microprocessor Manual”, supplied with the unit.

EHA | USER MANUAL

EHA | HF61GJ0349G

8 START-UP

This paragraph provides the necessary instructions that must be followed for correctly starting the unit.
C WARNING
In any case, please also refer to the document “First start up instructions” and to the Microprocessor Manual, supplied with the unit.

Check that all the conditions specified in this manual have been observed, among which the working limits and the characteristics of the heat transfer fluid, as will be explained further on.
8.2 Operating limits

8.1 Preliminary checks
Before starting the unit it is necessary to carry out the following checks: if the unit is charged with r454B refrigerant, aerate all
closed vanes before doing any action; check that all the taps in the cooling circuit are open (liq-
uid line) and that the flow switch is closed, by entering the status menu of the digital inputs; remove the protective cap of the a2l sensor; check that electrical wiring has been carried out correctly and that all the terminals are tightened hard (see paragraph 6.2 Electrical connections p. 38); after checking that the unit is powered, check that voltage at the terminals complies with the value indicated on the silver label and the corresponding tolerance; then check that the yellow phase sequence relay light (if any) is lit. The phase sequence relay is marked rsF and failure to observe the sequence will not enable a machine start; make sure that there are no refrigerant leaks due to accidental impacts during transport and/or installation; check the correct power supply to the enclosure heaters – if any; check all air has been vented through the vents on the pumps.
C WARNING
The introduction of compressor casing resistances, if any, must be done at least 12 hours before the first start-up; it then occurs automatically when the main disconnector switch is closed. They are intended to increase the temperature of the oil in the sump, thus limiting the amount of refrigerant dissolved in it and ensuring that the desired lubrication characteristics are preserved.
To ensure the correct operation of the heating elements, check that the lower part of the compressors is hot and in any case, that it is at a temperature 10-15°C higher than ambient temperature.
A slight foaming [1-5 mm] of the oil at start-up (pressure drop => decrease in solubility %) is physiological and will not affect the reliability of the system. Check that the hydraulic connections have been per-
formed correctly, in accordance with the indications on the data plates on- board the machine (correct inlet and outlet connectors). Please refer to paragraph 6.1 Hydraulic connections p. 34. Check that the hydraulic system has been vented, bleeding any residual air, filling it gradually and opening the venting devices at the top – which the installer must have prepared in advance.

The following tables and graphs describe the continuous operation limits of the units.
C WARNING
non-compliance of these limits makes it null and void the stipulated warranty contract.
C WARNING
Depending on the working conditions of the unit, it may be mandatory to adopt some devices supplied as options. Please refer to the indications given in the key to the operating limits diagrams.
C WARNING
The envelopes shown in the following diagrams refer to the general standard range. The choice of different available options can lead to changes in the corresponding envelope. Please refer to the specific technical selection.
B ATTENTION
standard units with pure water are not designed to operate with chilled water temperatures below 5°C at the plate heat exchanger output. Water can be produced at temperatures below 5°C and down to -10°C using glycolate solutions that lower the freezing point, as shown in paragraph 8.3 Thermal carrying fluid p. 44. In this occurrence, it is necessary to contact the manufacturer’s design department to set up the unit appropriately. The main limits regarding the operation of the units EHA are: Heat transfer fluid: only water or glycol

water mixture
with no more than 40% anti-freezing agent Water operating pressure: refer to the silver label on the
unit Input voltage: ± 5% of the rated voltage Maximum storage temperature: refer to the silver label
on the unit and the accompanying declaration of conformity Minimum storage temperature: refer to the silver label on the unit and the accompanying declaration of conformity
WATER FLOW AT EVAPORATOR
The rated flow rate is linked to the temperature difference of 5°C between the water inlet and outlet, in relation to the cooling capacity supplied at rated water (12/7°C) and air (35°C) temperatures. always refer to the technical selection conditions of the unit. The maximum permitted flow rate is that featuring a temperature difference of 3°C: higher flow rates, while being admissible, will cause unnecessarily high pressure drops. The minimum admissible flow rate features a temperature difference of 8°C or a minimum pressure drop equal to 10

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kPa: lower flow rates will cause a reduction in the heat exchange coefficients and too low evaporation temperatures, with the resulting possible activation of the safety devices and unit shutdown.
B ATTENTION
It is mandatory to install a mechanical filter (to be provided by the customer or available as an option with the unit supply) at the inlet to the hydraulic circuit of the plate heat exchangers, under penalty of immediate loss of the guarantee validity.

B ATTENTION
Units are designed to operate with water and air temperatures fixed by operating limits. Operation beyond these limits may cause irreparable damage to the units.
B ATTENTION
The units are designed to operate in a closed hydraulic circuit. In the case of open tanks, it is advisable to contact the design department which will indicate the best solution to adopt, such as uncoupling the exchanger.
8.2.1 Operating limits in chiller mode

» Operating limits in chilling mode

20
2
15
TW2
10

2 + 5

1+2 3

1 + 3

4 1+3

-5

1 + 2 3+4

-10 -15 -10 -5 0 5 10 15 20 25 30 35 40 45 50
Ta1

Ta1 outside air temperature

TW2 water outlet temperature

glycol mix on user side

condensation control

countercurrent on user side

custom version on request

pure water only if counter-current

EHA | HF61GJ0349G

8.2.2 Operating limits in heat pump mode » Operating limits in heat pump mode
55
2
50

1 + 2

TW2

20 -15 -10 -5 0 5 10 15 20 25 30 35 40 45
Ta1

Ta1 outside air temperature TW2 water outlet temperature

evaporation control

T>7°C user side

8.3 Thermal carrying fluid
The units of the series eHa can work with mixtures of water and glycol, with percentages of the latter up to 40%.

% by weight of glycol
0 10 15 20 25 30 40 50 60

Freezing temperature of the mixture with ethylene glycol (°C) 0 -3 -5 -8 -11 -14 -22 -34 -48

Freezing temperature of the mixture with propylene glycol (°C) 0 -3 -5 -7 -10 -13 -21 -33 -51

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B ATTENTION
If the required amount of 40% glycol needs to be exceeded, or in any case, in conditions of use other than those prescribed by the following tables, please contact the design department for the required checks; doing otherwise will render the equipment warranty null and void.
B ATTENTION
Using glycol is necessary in all cases in which the temperature of the heat transfer fluid drops below 5°C, i.e. even when the unit is switched off or only running in summer mode, should this temperature condition occur. This will prevent

Glycol percentage by weight ETHYLENE-BASED
PROPYLENE-BASED

%
Developed heat capacity correction factor Water flow rate correction factor Pressure drop correction factor Developed heat capacity correction factor Water flow rate correction factor Pressure drop correction factor

water freezing and the resulting internal damage to components.

The percentage of glycol must be selected according to the lowest expected temperature. In the following tables, the freezing temperatures of the mixture are given as a function of the glycol content and the recommended amount of glycol – respectively.

Minimum water production temperature °C 5 2 1 -3 -6

Glycol percentage by weight

% 0% 10% 15% 25% 30%

The use of glycol will determine a change in terms of heat-
ing capacity, water flow and pressure drop. The corrective factors to be used according to the percentage of glycol are shown in the following table.

10%

20%

30%

40%

1,00

0,99

0,98

1,00

1,05

1,09

1,14

1,20

1,00

1,16

1,35

1,58

1,86

1,00

0,98

0,97

0,96

1,00

1,02

1,04

1,07

1,10

1,00

1,11

1,31

1,53

1,78

8.4 Start-up
Before starting up, If the unit is charged with r454B refrigerant, aerate all closed vanes. Close the main disconnector switch, select the desired operating mode on the control panel and press the “On” key on the control panel (refer to the “First start up instruction”, supplied with the documentation). The group will start if an enabling signal is received: from the safety devices related to the water circulation
pumps; from the flow switch; from the water temperature sensor returning from the
system [chiller inlet]; and if there are no alarms present. In case of starting: move the main switch to the On position; if the unit is provided with r454B refrigerant charge, the
refrigerant sensors start the activation and measurement procedures. The device is designed so as to generally run through all internal device tests (diagnostics) in the sensor control board and the connected gas sensors after each power-up or processor reset before the measuring operation starts. That means that the processor’s internal components and the associated program and working memories as well as the other components of the input and output units are tested. This process takes approximately 0,5 seconds. When all diagnostics have been successful, the connected sensors start their warm-up phase. The warm-up is necessary for the connected gas sensors to assume a stable state after return of the voltage without triggering a pseudo alarm. The warm-up time is approximately 5 min. after these checks, the controller will start; the pump will start than immediately; after 60 seconds the compressor starts;

check the temperature difference at water level (12-7°C to be checked with a thermometer on the unit inlet and outlet pipes);
check that there are no leaks on the refrigerant side and water side;
seal the unit with all the screws and panelling supplied. If the unit does not start, check that the set point or the thermostat are set to the desired values.
C WARNING
The commissioning of the unit must comply with the statutory regulations of the state where the machine is installed. The responsibility for correct use is exclusively ascribable to the user. To ensure a correct shutdown of the unit, please refer to the paragraph 8.7 Group stop p. 46.
8.5 Inspections during operation
Check the correct phase sequence by means of the phase sequence relay (a) provided in the electrical control panel: if it is not correct, switch off voltage and reverse two phase wires at unit inlet. never alter the internal electrical wiring, otherwise the warranty will be voided.
C WARNING
All three-phase on-board devices: compressor, water pump, fans (in some versions), have a mandatory rotation direction and have been factory-synched with each other.
Check that the temperature of the water at the user exchanger inlet (return flow from the system) is close to the set value. The time required to reach steady state

EHA | HF61GJ0349G

conditions depends on the starting conditions, the system size and the load conditions.

1234
ok alarm

5678
8.6 Refrigerant charge checks
after a few hours of operation, check that the liquid indicator (a) has a green crown: a yellow colour indicates the presence of moisture in the circuit. In this case, the circuit must be drained by qualified personnel. Check that no large amounts of bubbles appear in the liquid viewing window. A continuous and intense flow of bubbles may indicate low levels of refrigerant which may need topping up. In any case, the presence of some bubbles is allowed, especially if a high glide ternary mixture is used as refrigerant. after a few minutes from compressors start-up, check (during operation as a chiller) that the end-of-condensation temperature shown on the pressure gauge (refer to the scale of the refrigerant pressure gauge in use and marked with the initials D.P. – Dew Point) is about 16 – 22°C (depending on the type of unit and load conditions) above the temperature of the condenser inlet air with the fans forced to maximum speed. also check (during operation as a chiller) that the end-of-evaporation temperature shown on the pressure gauge (refer to the scale of the refrigerant pressure gauge in use, marked with the initials D.P. – Dew Point) is about 3.5 – 4°C lower than the water outlet temperature from the evaporator. 1. Make sure the overheating of the cooling fluid is limited
to between 5 and 8 °C. To this end: detect the temperature indicated by a contact ther-
mometer placed on the compressor intake pipe; detect the temperature indicated on the scale of a
pressure gauge also connected at the intake end; refer to the scale of the pressure gauge for the refrigerant in use – marked with the initials D.P. (Dew Point). The difference between the temperatures determined in this way indicates the overheating value. 1. Ensure that undercooling of the refrigerating fluid is between 4 and 6°C; to do this: detect the temperature indicated by a contact thermometer placed on the compressor outlet pipe; detect the temperature indicated on the scale of a pressure gauge connected to liquid intake at the condenser outlet; refer to the scale of the pressure gauge for the refrigerant in use – marked with the initials B.P. (Bubble Point). The difference between the temperatures determined in this way indicates the undercooling value.

The difference between the Dew Point and Bubble point temperatures is known as “GlIDe” (gliding) and it is typical of refrigerant mixtures. If pure fluids are used, the phase change takes place at a constant temperature and therefore, the Glide is equal to zero. If HFC r410a is used (50%-50% mix of r32/r125) the Glide is negligible (0.2°C) and in actual fact, the fluid is similar to a pure fluid.
B ATTENTION
any charge top-ups must be carried out with refrigerant of the same type as that indicated on the plate, by specialised personnel and exclusively in the liquid phase.
B ATTENTION
The r410a / r454B refrigerant requires “POe” polyolester oil of a type approved by the compressor manufacturer. For no reason should mineral oil be introduced in the circuit.
8.7 Group stop
The group is stopped by pressing the “OFF” key on the front panel or by acting on the main disconnector, or by acting on the special controls of the lCD user interface.
B ATTENTION
It is recommended not to power off the unit via the mains power switch during regular shutdowns, but only in case of expected prolonged idle times (e.g. seasonal stops). The mains switch must be used to cut the unit off from the power supply when there is no current flow, i.e. when the unit is in the OFF state. Additionally, by completely disconnecting voltage to the unit: any casing resistances would not be powered – which
would damage the compressor upon its next start the only antifreeze protection would be the presence of
glycol. If the unit is powered, the antifreeze protection is linked to the presence of the antifreeze option (if present).
B ATTENTION
With the machine turned off but powered, the pumps could start automatically. Do not turn off any shut-off valves on the lines and do not carry out work on the lines before having disconnected all power supply to the machine.
When starting the machines (with a compressor) after a prolonged idle time without power supply, allow for at least 4-8 hours for heating of the enclosure via the provided heaters.

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9 CONTROL AND SAFETY DEVICES

all control equipment is calibrated and tested at the factory before shipping the machine. However, after the unit has been operating for a reasonable period of time, it is advisable to check the operating and safety devices.
A DANGER
all service operations on the control equipment must be carried out EXCLUSIVELY BY QUALIFIED PERSONNEL: incorrect calibration valuescan cause serious personal injuries and damage the unit.
Many of the operating and calibration parameters of control systems are set by microprocessor control and are password protected.
9.1 Control devices
9.1.1 Service thermostat The service thermostat activates and deactivates the operation of the compressor, depending on chilled water (operation as a chiller) or heated water (operation as a heat pump) requirements, via a probe located at the inlet or outlet of the water exchanger. This device is managed by the microprocessor control and operates with a proportional band of adjustable width. For further details please refer to the control manual.
9.1.2 Control device settings The calibration valuesof the control devices set by default for the specific unit are contained in the document “Parameter list”, made available to customers by the manufacturer.
9.2 Safety devices
On each refrigerant circuit, according to the volumetric capacity of the installed compressors, the PeD (Pressure equipment Directive 2014/68/eU) category of the machine and the refrigerant circuit configuration, there are safety devices for the refrigeration circuit as prescribed by the PeD regulation. In particular, this regulation requires designing to be carried out by referring to the technical standard that is closest to the type of item produced; in the case of machines designed for air conditioning or cooling of liquids, the UnI en 378-2 standard is referred to. according to this standard, on a case by case basis, on the high and low pressure sides of each refrigerant circuit safety venting valves can be provided, connected to an exchange tap, to protect the pressurised parts and programmed to be activated when the maximum pressure setting is reached on the corresponding side (Ps). The high and low pressure sides have a maximum pressure PS defined by the pressure limit of the machine components; this pressure cannot be reached during normal machine operation. For more details, refer to the refrigerant circuit diagram of the unit.

During normal use, high pressure at the compressor outlet is limited by the high pressure switch, set to the maximum working pressure of the compressor itself, which depends on the unit model and is equal to the Ps, in compliance with the UnI standard en 378-2. all the safety devices installed on the units are listed and described here below.
9.2.1 High pressure switch
The maximum pressure switch stops the compressor when its outlet pressure exceeds the preset value. To check its operation, shut the air flow in the condensers the with the compressors running, and check on the compressor delivery pressure gauge (previously installed) that the pressure switch (compressor stop) is activated when the calibration value is reached.
B ATTENTION
any shutdown or alarm must be reported immediately to the service department.
B ATTENTION
Do not attempt to change the maximum pressure switch pre-setting. If the pressure switch is not activated after a pressure increase, the vent valve will open.
B ATTENTION
If, during this operation, the safety device is not activated, the second pressure switch in a cascade configuration or a second protection system will operate by switching off the unit; in any case, however, always be sure to be ready to turn the unit off as indicated in section 8.7 Group stop p. 46. See also the paragraph 6.1.6 Tank filling mode p. 38.
resetting the high pressure switch must be done manually and only when the pressure has fallen below the value indicated by the set differential value (see 9.2.6 Safety device settings p. 49).
B ATTENTION
The high pressure switch connector does not have the refrigerant sealing needle. Do not unscrew the device: this would cause the refrigerant to flow out of the refrigerating circuit.
9.2.2 Low pressure protections
To ensure protection against low pressure, the units are equipped with a low pressure switch that stops the compressor when the suction pressure falls below the calibration value for a set time. resetting is controlled manually and must be carried out by the user via the display. as an antifreeze protection, a pressure probe is also provided which stops the unit as soon as the pressure falls below the calibration value for a set time. For more information related to the operation, the calibration values and the set delays, please refer to the microprocessor manual and the document “Parameter list”, supplied with the unit.

EHA | HF61GJ0349G

9.2.3 Compressors timing
The compressor switching on and off timing schedules programmed by the manufacturer on the units guarantee correct operation of the compressors and an increased durability and stability of the system. They establish: the minimum activation time of a compressor, which
must remain on for a time equal to the set time; the minimum shutdown time of a compressor, which is
not powered back on unless the minimum selected time has not elapsed since the last power-off; the delay time between two power-on requests of different compressors, i.e. the minimum time that must elapse between two power-ons of the devices independently of the detected measurement and the setpoint; the delay time between two successive power-ons of the same compressor, the minimum time that must elapse between two power-ons of the device. The purpose of the minimum time intervals is to stabilize the operation of the compressors, ensuring adequate circulation of the oil in the refrigerant circuit and preventing too frequent compressor stops and starts, limiting the maximum number of starts per hour. For more information related to the operation, the calibration values and the set delays, please refer to the microprocessor manual and the document “Parameter list”, supplied with the unit.
B ATTENTION
Never change the factory preset time interval: valuesother than the default ones may cause serious damage to the unit.
9.2.4 Antifreeze thermostat
The antifreeze sensor, located at the outlet of the plate heat exchanger, detects any temperatures that are too low and stops the unit operation. This function, together with the flow switch, the low pressure switch and the low pressure probe, protects the exchanger against the risk of freezing due to faults in the hydraulic circuit. This device is a feature included in the microprocessor control, for further details refer to the control manual.
B ATTENTION
In the presence of alarms related to the activation of the described protections, the user must request technical assistance, otherwise the guarantee will lapse.

When a sudden change in the thermal load occurs, a traditional expansion valve is designed to be in a transient state for 2-3 minutes before reaching its equilibrium condition. E.g.: One compressor switches off evaporation temperature increases Overheating decreases Valve closes Refrigerant flow decreases refrigerating power decreases evaporation temperature decreases … and so on…
X
01 02

Apertura Valvola (mm)

2÷3 min.

9.2.5 Expansion valve
On all units eHa the electronically controlled expansion valve (a) is fitted as part of the standard equipment. This device, if correctly parameterized and controlled by the software, can make the operation of the refrigeration circuit highly effective, which has as a final effect that of decreasing the power absorbed by the system.

safety valve opening (mm)

If, on the other hand, there is an electronic expansion valve,
in case of a compressor switch on or off request: the electronic driver pre- positions the valve at a point
very close to that of final balance the state of balance is quickly reached by small adjust-
ments the expansion valve becomes an active and no longer
passive system component the transient state lasts for a very short time globally, the system is more efficient, with higher EER val-
ues and therefore, with more considerable savings.

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9.2.6 Safety device settings
The calibration values of the software and mechanical safety devices are visible respectively: in the “Parameter list” document, made available to cus-
tomers by the manufacturer; in the silver label provided on the unit.
9.2.7 Water differential pressure switch
The paddle flow switch, supplied pre-mounted and wired or separately as part of the equipment, according to the different models, stops the unit in case of excessive reduction of the water flow, preserving it from frosting (operation as a chiller) and excessive condensation temperatures (operation as a heat pump).

In addition to the gas sensor element and the measuring
amplifier, the sensor cartridge also contains a processor for measured value processing. all data and measured values of the sensor element are stored in the processor fail-safe and are transmitted digitally via the digital interface to the control board. The control board functions are communication and supply of the gas sensors. In normal operating mode (measuring mode) there are no faults present, the gas concentration of the active sensors is continuously polled and checked for plausibility. The device continuously monitors itself, the measurement signal, the alarm relay and the communication to the sensor head. When the alarm evaluation is activated, the gas signal
is checked with each measurement cycle, if or alarm threshold and if exceeding, the alarm leD and the alarm relay are triggered. If the value falls again below the alarm threshold minus the set hysteresis, the alarm is automatically cancelled.

» Refrigerant sensor A2L

9.2.8 Water safety valve
The water safety valve opens when the pressure within the water circuit reaches a level that may cause damage to the unit.
9.2.9 Refrigerant sensors (if “A2L-ready” and “R454B” refrigerant options present)
When the unit is provided with a2l-ready or r454B refrigerant options, refrigerant sensors are installed in all compressor boxes and in all separated sections of the electrical box. The refrigerant sensor is composed by: a main and a remote control board One sensor cartridge for each control board (only for
“r454B” refrigerant option) Pay attention that in the “A2L-ready” configuration the refrigerant sensor cartridge is not present. For this reason, the unit can’t be operated with r454B refrigerant charge. If needed to charge the unit with r454B refrigerant, please see chapter 11 Substitution of R410A with R454B refrigerant p. 56. For the units provided with r454B refrigerant, the unit is equipped with sensor cartridges.

EHA | HF61GJ0349G

10 ROUTINE MAINTENANCE AND CHECKS

To keep the unit in good working order and guarantee the expected levels of performance and safety, it is necessary to carry out some periodic routine checks: some may be performed directly by the user while others must be carried out solely by specialised personnel. In any case, the regulations in force in the country of installation must always be complied with.
10.1 Checks to be performed by the user
Operating these machine basically requires just switching on, switching off and seasonal switching between cooling and heating operation. all other operations are maintenance tasks and must be performed by qualified personnel who are able to operate according to the laws and regulations in force.
B ATTENTION
Pay special attention when working near the finned exchangers as the aluminium fins are very sharp.

after maintenance operations, always close back the unit using the provided panels, fixing them with their tightening screws.
For the safety of the maintenance staff in charge of the groups eHa, it is essential to switch off the unit from the main switch before carrying out maintenance operations. In particular, to access the ventilation compartment, a safety panel (see fig.) with the indication “danger moving parts” has been provided for sizes ranging from frames 1 to 6, in order to avoid accidents due to the fans operating while units are working.
To preserve the unit from possible faults and guarantee its correct operation over time, it is necessary to regularly carry out the inspections shown in the following table.
» Second safety panel

10.2 Checks and maintenance to be performed by specialised personnel
The periodic inspections that must be performed by qualified and authorised personnel are indicated in the following chapter.
A DANGER
all the operations described in this section MUsT alWaYs Be PerFOrMeD BY QUalIFIeD PersOnnel.
For safety reasons, adequate measures and precautions must be taken regarding installation, to prevent ambient temperature – when the machine is switched on or off – exceeding the provisions of paragraph 8.2 Operating limits p. 42.
Before performing any work on the unit or accessing internal parts, be sure to have disconnected power supply.
The compressor delivery pipe and upper part reach a maximum temperature of 110°C. Be very careful when operating nearby with the unit in operation.
Pay special attention when working near the finned exchangers as the 0.11 mm thick aluminium fins can cause superficial cuts.

C WARNING
This table shows the inspection schedule recommended by the manufacturer to ensure the expected performance and safety levels. For information on the inspection schedule and methods required at regulatory level, especially for the prevention of refrigerant leaks, the main european reference standards are en-378 and the european F-Gas regulation no. 517/2014. If there is a national regulation, reference should be made to it. The following table is for general guidance: please do not consider any operations involving components not present in a specific model.
all the following procedures must be performed in compliance with the safety regulations described in this manual.
C WARNING
In case of extraordinary maintenance (e.g. replacement of components) contact the technical department for the correct tightening torques. If the compressor is replaced, the filter must also be replaced.

ACTION

MAINTENANCE FREQUENCY

1 month 3 months 6 months 1 year

UNIT

Check that no unusual noise is emitted by the machine and in particular, that there are no vibrations and/or beating.

EHA | USER MANUAL

ACTION

Check for dirt, damage, corrosion, wear and ensure correct fixing.

FANS
Caution: do not access the fan while the fan wheel is in
operation

Check for any noise of the bearings and the balancing of the shaft. Measure current and power consumption. Check the electrical connections. Clean to preserve smooth functioning.

Check the correct closing of the electrical box (if available).

Check for dirt, damage, corrosion, and wear.

Check the filter condition.

AIR FILTERS

Clean or replace if necessary.

Perform checks more frequently in dusty environments.

Check the efficiency of the differential pressure switch for dirty filters.

Check the correct installation and the wiring conditions.

Check the operation of the LEDs of the display control system and of the alarms.

Check the connections for electrical and mechanical operation.

CONTROL SYSTEM

Check the functional elements (e.g. operating controls and display devices).
Check electrical/electronic and pneumatic input signals (e.g. sensors, remote controllers, control variables) to conform to normal values.

Check the valuesin the parameter list (see the Microprocessor Manual).

Adjust the control function and control signals. Check the software cycle running (see the Microprocessor Manual).

Check the power supply in all phases.

Check the electrical connections and the mechanical function. Restore if not properly tightened.

Check the power supply of all the terminals.

SWITCH BOOTH POWER Measure power consumption at all connected devices.

SUPPLY CIRCUITS

Check, adjust and tighten the functional elements (e.g. operating controls and

Caution: the electric cables and electrical components of the air

display devices).

conditioner are live.

Check the safety equipment, e.g. thermal switch. Replace every 2 years.

Check the protective covers.

Check the tightening of the electrical terminals both inside the electrical panel and
in the compressor terminal blocks. The mobile and fixed contacts of the contactors must be periodically cleaned and, if they show signs of deterioration, they must be replaced.

CONDENSATE/FREECOOLING Check the cooling water circuit, check for damage, leaks and ensure

eneren EHA Air Condensed Chiller

Product Information: EHA and Process Cooling

Start-up Instructions

Product Identification

INTRODUCTION

START-UP INSTRUCTIONS

SAFETY SYMBOLS

Scope of application

References

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