Rossato CN REC 300 IDRO Service manual
Ecodry CN REC- Installation, use and maintenance
Following instructions are addressed both to the installer and to the final user who need respectively to install
and to use the product. Failure to observe the indications present in this manual involves the customer in
exclusion from warranty.
Following instructions contain essential and important information for a safe and perfect installation and are
integral and essential part of the product. Therefore the entire technical documentation must be always kept
close to the product.
All data and instructions contained in the present manual are referred to actual technology level.
Please always consult the instructions contained in the present manual when installing the unit.
The activities described in this manual need specialistic knowledge and professional experience in installation.
By consequence it is necessary that mounting operations described are made only by personnel with indicated
technical requirements.
Schemas used are only a rough guide, have no pretensions to be complete and cannot replace the project.
Even if this manual has been realized with maximum care, mistakes and updates are possible; Rossato Group
Srl will not be responsible for inaccuracies and omissions.
Contents, images, texts and layout of this document are property of Rossato Group srl and any copy - both
total or partial - is forbidden without written authorization.
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Ecodry CN REC- Installation, use and maintenance
Table of content
1. Introduction
1.1 Responsibility
1.2 Explanation of symbols
1.3 Service rules
1.4 Reference regulations
1.5 Reception of the unit
1.6 Moving and transporting
1.7 Unpacking
1.8 Intended use
1.9 Interventions and maintenance
1.10 General safety rules
2. Description of the unit
2.1 Range
2.2 Air flows
2.2.1 Ecodry CN REC 300 and 450
2.2.2 Ecodry CN REC 600
2.3 Structure
2.4 Planning criteria
2.5 Unit identification
2.6 Main components
2.7 Diagrams of devices disposition
2.8 Options and functions
3. Refrigeration and hydraulic circuits
4. Electrical circuits
4.1 Electrical equipments
4.2 Electrical diagram
5. Technical data
5.1 Table of technical data and operation limits
5.2 Air flow and pressure
5.3 Hydraulic circuit pressure drops
5.4 Cooling power ECOdry CN REC 300 and 600 Idro
5.4 Dimensions
6. Installation
6.1 Unit positioning
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Ecodry CN REC- Installation, use and maintenance
6.2 Duction
6.3 Hydraulic connections
6.3.1 Water circuit connection
6.4 Electric connections
6.4.1 Terminal block and wiring
6.5 First commissioning, calibration and settings
7.1 Keys
7.2 Main screen
7.3 User menu
7.4 Alarms menu
7.5 Unit status menu
7.6 Time bands menu
7.7 Other screens
8.1 Events and faults
8.2 Maintenance table
8.3 Ordinary maintenance
8.4 Extraordinary maintenance
9. Dismantling of the unit
9.1 Environmental protection
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Ecodry CN REC- Installation, use and maintenance
1. Introduction
This manual indicates the expected use of the unit and provides instructions for transportation, installation, assembly,
adjusting and usage of the unit. It provides information for maintenance, ordering of spare parts, presence of residual risks
and instructions for the staff.
The user manual should be read and used as follows:
❏Each operator and staff involved in the use and maintenance of the unit must read carefully the entire manual and
follow what is indicated.
❏The employer is obliged to ensure that the operator has the required aptitude to conduct the unit and has carefully
read the manual; the employer must also inform the operator about the risks of accidents and, in particular, about
the risks arising from the noise, on personal protective equipment and safety regulations provided for by law or by
general international standards and the country of destination of the unit.
❏The manual must always be available to users, directors, operators appointed to the transport, installation, use,
maintenance, repair and final dismantlement.
❏Keep the manual in areas protected from humidity and heat and consider it an integral part of the unit throughout its
duration, giving it to any other user or subsequent owner of the unit;
❏Make sure that any update received is included in the text;
❏Do not damage, remove, tear or rewrite the manual or parts of it for any reason; in case the manual is lost or is
partially ruined and its content can no longer be read, it is recommended to request a new manual reporting serial
number indicated on the machine's nameplate to the manufacturer.
Rossato Group reserves the right to modify production and the manual, not being obliged to update the previous versions in
particular cases.
This manual reflects the state-of-the-art at time unit’s sale and cannot be considered inadequate if subsequently updated
according to new technologies.
To ask for updates or integrations that are part of the present manual, please contact Rossato Group.
1.1 Responsibility
The unit is guaranteed in accordance with contractual conditions agreed between the parties. The warranty certificate is
available on www.rossatogroup.com
The manufacturer considers himself exempt from all responsibilities and obligation and will invalidate the warranty for any
injury to persons or things that may occur due to:
●failure to follow the instructions in this manual with regard to the operation, use, installation, maintenance
and any other event unrelated to the normal and proper use of the unit;
●Modifications made to the unit and safety devices without the manufacturer's prior written permission;
●Attempted repairs made on your own or by unauthorized technicians;
●Failure to perform regular and consistent maintenance or use of non-original spare parts.
In any case, if the user attributes the accident to an unit's defect, it would be necessary to prove that the occurred damage
was a main and direct consequence of this "defect".
1.2 Explanation of symbols
DANGER:
This symbol indicates rules to prevent user from accidents.
Failure to observe these instructions can result in serious damage to humans, objects, plants or animals.
CAUTION:
Failure to observe these instructions can result in damages to the unit or the system
INFORMATION:
This symbol indicates useful information
1.3 Service rules
The service standards described in this manual are an integral part of the unit's equipment.
These standards are intended for the operator who has been previously and specifically trained for the conducting of this
type of unit and contain all the necessary and essential information for the safe operating and optimal use of the unit.
Hurried and incomplete installation can cause many accidents.
Carefully read and follow the following suggestions:
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Ecodry CN REC- Installation, use and maintenance
CAUTION:
The first start-up must be carried out only by qualified personnel authorized by Rossato Group.
❏At the time of installation or when interventions on the unit are required, you must observe the following rules on this
manual, follow the directions on-board the unit and apply all appropriate precautions;
❏Possible accidents to people and things can be avoided following these technical instructions compiled with
reference to the machinery directive 2006/42/EC and subsequent amendments. In any case, always conform to
national safety standards;
❏Do not remove or damage the safeguards, labels and lettering, especially those imposed by law and, if no longer
legible, replace them.
CAUTION:
All operators must comply with international safety standards and those of the country of destination of the unit in
order to avoid possible accidents.
The units have been designed and constructed according to the current state-of-the-art and of the current technical
standards.
The laws, rules, regulations, prescriptions and directives in force for these types of machinery have been observed.
The materials used and equipment parts as well as production processes, assurance of the quality and control of the
systems meet the highest standards of safety and reliability.
It may be possible to maintain continuous performance and functionality and durability of the unit by using this equipment for
the purposes specified in this user manual, operating them with due diligence and accurate maintenance and revisions to
perfection.
1.4 Reference regulations
By affixing the mark to the unit, Rossato Group declares that the dehumidifier Ecodry CN REC conforms to following
relevant safety regulations:
❏89/391/CEE
❏89/686/CEE
❏89/654/CEE
❏89/655/CEE
❏86/188/CEE
❏92/58/CEE
❏92/57/CEE
Corresponding documentation and declaration of conformity are kept by the manufacturer and available upon request.
1.5 Reception of the unit
When receiving the unit, please check its integrity. The machine left the factory in perfect condition: Any damage must be
immediately reported to the carrier and noted on the Delivery Note before countersigning it.
The manufacturer or its agent shall be made aware of the extent of the damage within 6 days of delivery.
The Customer must send the manufacturer a written report describing any damage found and including photos.
1.6 Moving and transporting
During moving and positioning of the unit it is necessary to take the utmost care to avoid violent maneuvers. Internal
movements should be made carefully avoiding to lever with parts of the units.
DANGER:
In all raising operations make sure that the unit is fixed to avoid that it overturns or falls down accidentally. Do not
move or raise the unit making pression on removable panels.
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1.7 Unpacking
The packaging of the unit must be removed with care, avoiding possible damage to the machine; the materials that make up
the packaging are of different types, wood, cardboard, nylon, etc.. It is good practice to store them separately and hand them
over for disposal or eventual recycling, to the companies in charge of this purpose, thus reducing their environmental impact.
Please ensure that packaging is disposed correctly according to local laws
NOTE:
Disposal of packaging is care of receiver who will make it in conformity with local laws of the country where the
device is installed.
1.8 Intended use
Ecodry CN REC units are ducted dehumidifiers for false ceilings with heat recovery, to be installed in conjunction with radiant
systems. The dehumidifier Ecodry CN REC allows dehumidifying, cooling and heating by exchanging the exhausted air with
clean air from outside.
Its use is recommended within the operating limits given in this manual.
DANGER:
Place the unit where there is no explosion danger, corrosion (if close to the sea), fire and where there are vibrations
and electromagnetic fields. It is also forbidden to operate in different ways as indicated here or to disregard
necessary safety operations.
1.9 Interventions and maintenance
It is worth mentioning that the user manual can never replace the user's adequate experience; for some particularly difficult
maintenance operations, this manual constitutes a reminder of the main operations to be undertaken by operators with
specific preparation acquired, for example, attending training courses by the manufacturer.
Read carefully following recommendations:
❏A constant and accurate preventive maintenance always assures high safety in the unit's operation. Never postpone
necessary repairs and have them performed exclusively by qualified personnel, using only original spare parts.
❏Schedule any work with care.
❏The workplace of the operators must be kept clean, tidy and free from objects that may limit movements.
❏Operators must avoid clumsy operations or in awkward positions that may impair their balance.
❏Operators must be careful of the risk of getting clothing and/or hair caught or entangled in moving parts; the use of
a hair cap is recommended to contain long hair.
❏The use of necklaces, bracelets and rings can be dangerous.
❏The workplace must be suitably lit for the operations to carry out. Insufficient or excessive lighting can entail risks.
❏Wait about 10 minutes from the unit's switch off before performing maintenance in order to avoid burns.
DANGER:
- Do not repair high-pressure tubes with seals.
- Pressurised fluids in the refrigeration circuit and the presence of electrical components can cause risky situations
during installation and maintenance operations.
❏Minimize the time of refrigerant circuit’s opening. Even reduced oil exposure to air causes the absorption of large
amounts of moisture from the same oil resulting in formation of weak acids.
❏Any work on the unit must be performed by qualified personnel.
❏Before making any intervention or maintenance on the unit, make sure you have removed the power supply.
❏Check that the safety devices are working properly and do not have doubts about their functioning; otherwise, do
not start the unit under any circumstances.
❏Only use equipment recommended by the manufacturer of the unit. To avoid personal injury, do not use worn,
damaged, poor quality or improvised equipment.
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CAUTION:
Once the cleaning of the unit has been carried out, the operator must verify that there are no damaged or worn parts
or not solidly fixed; if not, ask the maintenance technician to intervene.
❏Always keep the area where the unit is located clean and tidy.
❏The use of flammable fluids in cleanup operations is forbidden.
To clean the unit, do not use gasoline, petroleum or solvents as the first ones leave an oily patina that makes the depositing
of dust easier, while the solvents (even weak) damage the paint and then accelerate rusting. If a water jet penetrates into
electrical equipment, apart from inducing oxidation of the contacts, it can also cause a malfunction of the unit. For this
reason, do not use jets of water or steam on sensors, connectors or any electrical part.
Particular attention must be paid to the state of integrity of pressurized tubes or other parts subject to wear. You must also
check that there is no leakage of fluids or other hazardous substances.
If such situations occur, the operator is prohibited to restart the unit until the fault has been repaired.
1.10 General safety rules
❏Wear protective clothing
Each operator must use personal protection equipment such as gloves, protective helmet, safety glasses, safety shoes,
headphones for protection against noise.
❏Fire extinguisher and first aid
Place a first-aid kit and a fire extinguisher nearby.
Periodically make sure that fire extinguishers are charged and that the method of use is clear.
In case of fire, use it according to the current regulations and call the firemen.
Periodically check that the first aid box is complete.
Make sure emergency telephone numbers for first aid are available nearby.
NOTE:
The fire extinguisher and first aid is the responsibility of the owner of the property where the unit is installed.
❏Warnings for checks and maintenance
Apply a sign that indicates: "UNDER MAINTENANCE" on all sides of the unit.
Carefully check the unit following the list of operations given in this manual.
❏Safety plates
Generic alarm
Danger
High voltage
Burn hazard
Danger
Moving parts
Danger
Sharp injuries
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Ecodry CN REC- Installation, use and maintenance
2. Description of the unit
High efficiency Ecodry CN REC dehumidifiers with heat recovery are designed for civil,
residential and small dimension commercial use, with high latent load that require operation
24 h/day.
They are particularly indicated in buildings where cooling is made through radiant systems
such for example, underfloor, wall and ceiling systems.
The units Ecodry CN REC combine state-of-the-art technical solutions with pleasant
aesthetics and, if correctly supplied with cold water at 15°C, they can dehumidify ambient air
without changing temperature or (if necessary) they can integrate cooling.
Neutral air is possible through 2 heat exchangers used to pre-cool inlet air and after-heat it
once it is dehumidified.
Cool air is possible through a plate condenser which removes the heat load from the
environment with the same water as the radiant system.
The units have been designed to be canalized with hard ducts or with flexible pipes.
The electronic fans with permanent-magnet brushless motor with embedded inverter ensure
a high head optimizing electric consumptions.
The top-quality refrigeration, hydraulic, aeraulic and electrical components make Ecodry CN
REC units state-of-the-art dehumidifiers in terms of efficiency, reliability and emitted sound
power.
The very high efficient recovery unit ensures performances up to more than 90%.
2.1 Range
There are 8 different models, classified according to the dehumidification capacity (300-600
m3/h) and the function (Idro-Isothermal-Hybrid):
CN REC 300 Idro
CN REC 300
CN REC 300 DC
-
CN REC 450
CN REC 450 DC
CN REC 600 Idro
CN REC 600
CN REC 600 DC
CN REC_Idro units have no compressor and work with cooled air in summer or heated water
in winter. Dehumidification, cooling or heating are made with a water battery and a 3-ways
valve. In summer, when cooling or dehumidification or both are required, and in winter when
heating is required, the water valve is opened and supply air is treated. Without water the unit
goes on working only in ventilation mode.
CN REC units have a compressor and 4 heat exchange batteries divided as follows: water
pre-cooling, evaporating, condensing, water after-heating and allows summer
dehumidification with neutral air and winter heating.
In summer:
- with water at 15°C air is dehumidified and neutral (supply air temperature is the same as
ambient temperature);
- with water between 7 and 15°C air is dehumidified and slightly cooled;
- with water over 15°C the unit loses gradually dehumidifying capacity;
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- with water lower than 9°C the unit still works but the compressor is switched off and
supply air is treated only with water.
In winter, the compressor is always off and air is heated with the water of the radiant system,
as a normal heater fan.
Without water, the unit keeps working, losing dehumidifying power in summer and not
heating air in winter.
The units CN REC_DC have a compressor, a plate exchanger and 3 heat exchange batteries
divided as follows: water pre-cooling, evaporating, condensing. DC (double condensation)
dehumidifies in summer with neutral air or with cooled air and in winter heats the air.
With water between 12 and 18°C the dehumidification processes work properly, while with
water below 9°C or above 32°C, the compressor is switched off and the air is heated or
cooled exclusively with water from the radiant system.
In winter the compressor is always off and air is heated with water as a normal heater fan.
The unit DC cannot work without a right water flow and in summer will stop. Unblocking is a
manual reset and is performed by resetting the alarm that appears on the display. During the
lockout due to lack of water the compressor turns off, an alarm appears, the air is not treated
and the unit can only operate in recirculation/renewal mode. In winter without water the unit
does not lock out, but loses the ability to heat the air.
All versions can do ambient air exchange regardless of the season or water presence in the
radiant system.
2.2 Air flows
CN REC units have 5 predispositions for connection to air channels:
1. Supply indoor (bedrooms and living room)
2. Return from indoor (generally the hallway) for internal recirculation
3. Exhausted air extraction (from dirty rooms such as bathrooms, laundry or the kitchen)
4. Intake of renewal air from outdoor
5. Exhausted air expulsion outdoor
Airflow rates vary by unit model:
Model
Air flow
(m3/h)
Renewal air flow
(m3/h)
CN REC 300 IDRO
260
0-130
CN REC 300
260
0-130
CN REC 300 DC
260
0-130
CN REC 450
380
0-190
CN REC 450 DC
380
0-190
CN REC 600 IDRO
520
0-250
CN REC 600
520
0-250
CN REC 600 DC
520
0-250
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Ecodry CN REC- Installation, use and maintenance
The image below shows how to connect CN REC 300 to the various rooms and the air flow
rate in m3/h.
The units CN REC can work in three different ambient ventilation modes:
1. Only circulation (summer - winter):air is sucked indoor and supplied again indoor. It is
heated or dehumidified or cooled according to the user request.
2. Only exchange (always): typical mid-season operation, i.e. when only air exchange is
required without heating, dehumidifying or cooling. Air is sucked in from the dirty domestic
rooms (bathrooms and kitchen) and expelled outdoor. The same quantity of renewed air is
drawn in from outdoor and supplied into the noble indoor rooms (living room and
bedrooms). The level of air exchange (on 5 steps) is set by the user manually or according
to a time slot programming.
3. Circulation+exchange (summer - winter): this mode satisfies at the same time the
demand of air exchange and heating or dehumidification or cooling. This operation takes
place during the winter or summer period. Also in this case, the level of air exchange (on 5
steps) is set by the user manually or according to a time slot programming.
Air flows are automatic. The user shall only set temperature, humidity, season and the air
exchange level. CN REC automatically adjusts air flows.
The following images show the airflows for each mode of operation and for each size. Please
note that:
- When recirculation is active (heating or cooling and/or dehumidification active), the
supply to the room will always be at maximum.
- The air flows through the recuperator are always equal and balanced.
- The renewal is adjustable on 5 levels, from 1 to 5. The number indicates the
percentage of fresh air, for example 2 means ⅖ or 40%.
Meaning of the arrows
Red → Expulsion
Blue → Renewal
Green → Circulation
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Ecodry CN REC- Installation, use and maintenance
3. Circulation+exchange:
2.3 Structure
The unit is made with an exclusive design that gives it a pleasant aesthetic and at the same
time makes it impossible to access to the components when the device is closed: This,
combined with the extensive use of sound-absorbing material inside the compartment,
reduces the level of sound power emitted to exceptionally low levels.
The major part of the panels are removable to allow easy access to the device, although for
maintenance access is required from the bottom. Access to filters, fans and recovery unit is
possible through the removable panels that allow to operate without any obstacle.
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The unit panels are covered with an open-cell polyurethane synthetic material for maximum
sound absorption. This material falls in class 1 in compliance with the UL 94 standard and is
CFC-free.
All screws and fastening systems are made with non-oxidising materials, stainless steel or
carbon steel with surface passivation treatments.
Components distribution grants easy access to all of them and thanks to the layout the
weight is well distributed on the unit’s plant.
2.4 Planning criteria
All copper pipes are made under our specifications in order to control all production
processes and implicitly to improve our products quality. Each pipe complies with
requirements imposed by directive and is verified through calculation code FEM in the most
stressed point of 180° bending and at the max admitted pressure of safety devices
considering adequate safety coefficients.
All units have at the exchanger’s base condensation drain basins in stainless steel.
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2.6 Main components
2.6.1 Fans
To reach a high efficiency and a very low noise level, the units
ECOdry CN REC use only backward curved centrifugal fans
combined with modulating brushless EC motors with signal 0:10V.
Synchronous electrical motors BLDC (BrushLess Direct Current)
have a constant rotation speed independent of the load (or resistive
torque) but connected to the frequency defined by the inverter. The
synchronous Brushless motor is “free of brushes” because current is
not directly sent to the rotor but only to the stator and for this reason there is no need to
introduce any sliding electrical contact.
The microprocessor on board manages a feedback signal (BEFM Back Electromotive Force)
that certifies or not the synchronous rotation of the rotor with the magnetic field and in case
corrects the resistive torque in order to restore/maintain the simultaneity and so the utmost
efficiency.
2.6.2 Wall user display
Through the user interface the unit is completely autonomous and the
user can make all common operations (ON/OFF, setting, time
scheduling, air exchange, etc.). Moreover it shows the operation status
and allows the fine tuning of the advanced regulation and
configuration parameters used during the unit's commissioning. On
the display there are the temperature and humidity sensors. To let the
probe measure properly room temperature and humidity data, the display shall be far from air
currents and heat sources and shall not be closed in technical rooms.
2.6.3 Very high efficient recovery unit
In a house, good ventilation is very important but when outdoor air
temperature is considerably different from indoor air temperature, air
exchange may cause a big energy loss. The ultra-high-efficiency
counterflow heat recovery unit maximizes energy exchange between
incoming and outgoing air streams allowing maximum energy recovery.
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Ecodry CN REC- Installation, use and maintenance
The polystyrene ultra-high-efficiency counterflow heat recovery unit allows energy recovery
higher than 90%.
2.6.4 Finned block heat exchanger
Finned block heat exchangers allow the maximum frontal surface in
relation to the unit’s dimension.
Wide frontal surfaces reduce the risk of dirtying and thanks to the low
crossing speed, head loss on the air side is reduced for the benefit of
efficiency and sound power emitted by the fans.
They are planned to make the heat exchange between refrigerant or
water and air by means of pipes of diameter 9,52 mm, 25 x 22 mm in
the geometry, mechanically expanded with an automatic and controlled process, made of
aluminium fins with a thickness of 0,1mm.
The rolling expansion is a critical process that determines the contact resistance pipe/fin and
is a key factor - often ignored - when realizing high heat exchange efficiency.
2.6.5 Alternative compressor
Work optimization together with an accurate choice of the volumetric
compression ratio (VCR) results in a considerable improvement of
compression’s isentropic efficiency and consequently to a reduction of
energy losses in the process itself.
The alternative hermetic compressors are complete of motor
protection against overtemperature, overcurrent and against too high
temperature of supply gas; they are mounted on rubber vibration dampers, charged with oil
and placed inside a soundproof housing.
2.6.6 Brazed plate heat exchanger
In ECOdry CN REC are used only brazed plate heat exchangers in austenitic
stainless steel AISI 316 with connections in AISI 316L characterized by a reduced
carbon content to make brazing operation easier.
The brazed plate heat exchangers represent the state-of-the-art in terms of heat
exchange efficiency. The high turbulence induced by plates internal corrugation
combined with their perfect sanding avoid dirt deposits.
2.6.7 Solenoid valves
Solenoid valves are extensively used to control the liquids flow in case of
ON/OFF users.
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Ecodry CN REC- Installation, use and maintenance
The functioning principle consists in supplying electrical current to a coil that creates a
magnetic field. This is transformed to mechanical energy that opens and closes the valve.
The functioning principle is very reliable and commonly used.
2.6.8 Liquid receiver
The best refrigerant load depends on both the volumes of the exchangers and
the working points and thus may vary a lot in different operating systems. A
liquid receiver is necessary to re-establish the balance.
2.6.9 Other hydronic components
1. Molecular sieve dehydrating filter
2. High pressure switch
3. Schrader valves for control and maintenance
NOTE:
All images and illustrations are purely examples and may differ by the item installed on the unit.
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This manual suits for next models
7
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