Refrigerant gas R410A Efciency “Class A” Hydronic unit INTEGRA unit for 4-pipe systems, air source for outdoor installation NECS_Q_1314_3218_201005_GB r HFC R-410A (The photo of the unit is indicative and may change depending on the model) Climaveneta Technical Bulletin 1314 - 3218 352 - 823 kW NECS-Q
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Refrigerant gas R410A Ef� ciency “Class A” Hydronic unit
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INTEGRA unit for 4-pipe systems, air source for outdoor installation
NECS_Q_1314_3218_201005_GB
r HFCR-410A
(The photo of the unit is indicative and may change depending on the model)
Climaveneta Technical Bulletin
1314 - 3218
352 - 823 kW
NECS-Q
II NECS-Q_1314_3218_201005_GB
NECS-Q
HFC R410A
Company quality system certi� ed to UNI EN ISO 9001
SUMMARYNECS-N
1314 - 3218
Liability disclaimer
This bulletin is not exhaustive about: installation, use, safety precautions, handling and transport. Refer to “General Manual for Installation” for further informations.This bulletin refers to standard executions, in particular for di-mension, weight, electric, hydraulic, aeraulic and refrigerant connections (whereas applicable). Contact Climaveneta Com-mercial Of� ce for further drawings and schemes.
Climaveneta declines any liability derived from the bulletin’s use. This bulletin is of exclusive property of Climaveneta, and all forms of copy are prohibited. The information contained in this document may be modi� ed without prior notice.
1. Product presentation 1.1 Refrigerant gas R410A 1.2 Unique proposal 1.3 Ef� ciency (Class A) 1.4 Hydronic unit
2. Unit description 2.1 Standard unit layout 2.2 Certi� cation, reference standards 2.3 Tests 2.4 Controller 2.5 Versions 2.6 Accessories
3. Electronic controller 3.1 Control unit with LED display
4. Technical data 4.1 General technical data 4.2 Cooling capacity performance 4.3 Heat pump capacity performance 4.4 Recovery capacity performance
5. Operating range6. Hydraulic data
6.1 Water � ow and pressure drop7. Hydronic groups (Optional)8. Electrical data9. Full load sound level10. Dimensional drawings11. Key to hydraulic connections
This section contains general information on the NECS-Q ran-ge of products. For detailed information refer to the speci� c sections in this bulletin.
4-pipe systems
This type of system is suitable for air-conditioning buildings that require separate areas to be heated and cooled at the same time. It is combined with centralised solutions capable of producing hot and cold water in the two hydronic circuits of the system, assuring maximum comfort in every room of the building, inde-pendently and in any period of the year. From now on, a single intelligent unit is suf� cient for the mana-gement of these complex systems: INTEGRA.
INTEGRA unit for 4-pipe systems, air source for outdoor
installation
The NECS-Q series multi-use units are able to simultaneously meet hot and cold water production requests and are thus a valid alternative to traditional systems based on chill-ers and boilers for applications such as of� ce blocks, pools and shopping centres. The advanced control logic, developed by Climaveneta, en-sures that heating and cooling loads are perfectly met. When these are simultaneous, the unit exchanges evaporation and condensation heat with the system cooling and heating circuits respectively. When heat loads are not balanced or one of the two are missing, the unit automatically switches to a third heat source which can be air or water according to the model. The NECS-Q are units for outdoor installation. For these pro-ducts. heat is exchanged on the source side by a refrigerant-air coils exchanger; it acts as a condensert or as an evaporator according to machine conditions.
1.1 Refrigerant gas R410A
The use of R410A has resulted in units offering better energy ef� ciency in full respect for the environment (ODP = 0).
1.2 Unique proposal
Maximum Reliability
Unit with multi-circuit chilling section (two to four, depending on the size) designed to ensure maximum ef� ciency both at full load and at part loads, assuring uninterrupted service in the event one of the two circuits fails. The number of compressors also ensures a precise multi-step management of the cooling and heating capacity provided by each units.
V-Shaped coil geometry
Open angle v-shaped coils for achieving the maximum ef� cien-cy a all conditions. A speci� c design of the condensing modu-les allow to reduce the units footprint as well as the clearances, thus facilitating service and maintenance operations.The structure is also designed to allow the easiest access to all the components in order to simplify maintenance work.
Heat Pumps at -12°C outdoor temperature
NECS-Q models host several cutting-edge implementations, focused on the ef� ciency and extended operation in winter mode, also with harsh outdoor conditions. Heat pumps can in fact be equipped with the LT low temperature option. This inclu-des speci� c regulation which activates adequate refrigerant in-jection, allowing to achieve -10°C for the SL versions and -12°C the CA versions.
Silent Versions
Combined with the Class A versions, the sound power level is also a distinctive feature on the new NECS range. The new SL-
1. PRODUCT PRESENTATION
CA version unify in fact a premium ef� ciency level as well as a quiet operation at all working conditions.All standard units can be also provided with the compressors acoustical enclosure that can reduce the sound power level by 2dB(A).
Innovative fan management system
Climaveneta has designed a new system on how to manage the condensing fans with a complete new structure of the venti-lation section (patent pending). This allow to ensure outstanding performances in terms of ef� -ciency in all the operating conditions, thank to: - elimination of the reciprocal dependency on adjacent circuits- ability to manage independent defrost cycles on different at
different time in different circuits- a more accurate fans speed management and, as consequen-
ce, a lower power consumption.
1.3 Effi ciency (Class A)
NECS-N units are available in the CA version, with Class A ef� -ciency levels in the heat pump mode according to the Eurovent performance tables. These units exceed the minimum winter mode ef� ciency requirement assuring a COP ≥ 3.2, while in the summer mode they assure an EER ≥ 2.9.
1.4 Hydronic unit
The integrated hydronic assembly includes the main hydraulic components, with a low- or high-head pump and storage tank. Automatic pump rotation system in the event of a breakdown without interrupting operation (only in units with a twin pump).
1 NECS-Q_1314_3218_201005_GB
NECS-Q
HFC R410A
INTEGRA unit for 4-pipe systems, air source for outdoor
installation
Multi-purpose outdoor unit for use in 4-pipe systems for the si-multaneous production of chilled and hot water by means of two independent hydronic circuits. These units are able to satisfy the demand for hot and cold water simultaneously through a system that does not require seasonal switching and is therefo-re a valid alternative to traditional plants with chiller and boiler. This unit is equipped with hermetic rotary Scroll compressors, with R410A, axial fans, shell and tube heat exchangers and electronic expansion valve. The range is composed by units equipped with four, six and eight compressors in multi-circuit confi guration.
2.1 Standard unit layout
Structure
Structure specifi cally designed for outdoor installation. Base-ment and frame in hot-galvanised shaped sheet steel with a suitable thickness. All parts polyester-powder painted to assure total weather resistance.
Refrigerant circuit
Main components of the cooling circuit: - two to four circuits with tandem compressors for each circuit - R410A refrigerant - multi-circuit shell and tubes heat exchangers - anti-freeze heaters on both heat exchangers - liquid line check valve - dehydrator fi lter - coolant line sight glass with humidity indicator - electronic thermostatic valves - liquid receivers - high and low pressure transducers - high and low pressure gauges - high pressure safety valve - low pressure safety valve - high pressure safety switches - crankcase heater on each compressor - 4-way reverse cycle valves
Compressor
Rotary hermetic scroll compressors in tandem layout complete with oil sump heater, electronic overheating protection with cen-tralised manual reset and a two-pole electric motor.
Plant (side) heating exchanger water
Direct expansion multi-circuit shell and tube exchanger with asymmetric side coolant fl ows for maintaining the coolant atthe correct speed inside the tubes when passing from the liquid to the gas phase. Steel shell with foamed closed-cell elasto-mer anti-condensation lining. The shell & tube is manufactured using copper tubes with internal grooves for favouring heat ex-change and mechanically expanded onto the tube plates. An electric antifreeze heater prevents the ice from forming inside the exchanger when the unit is not working but connected to the electrical supply. When the unit is working, it is protected by a differential pressure switch mounted on the water side. Heat exchanger featuring two, three or four coolant circuits depen-ding on the model. The hydronic group is composed by:- differential pressure switch- air-vent valve- discharge valve- hydraulic connection fl ush with unit’s enclosure
Plant (side) cooling exchanger water
Direct expansion multi-circuit shell and tube exchanger with
asymmetric side coolant fl ows for maintaining the coolant atthe correct speed inside the tubes when passing from the gas to the liquid phase. Steel shell with foamed closed-cell elasto-mer anti-condensation lining. The shell & tube is manufactu-red using copper tubes with internal grooves for favouring heat exchange and mechanically expanded onto the tube plates. When the unit is working, it is protected by a differential pressu-re switch mounted on the water side. Heat exchanger featuring two, three or four coolant circuits depending on the model. The hydronic group is composed by:- differential pressure switch- air-vent valve- discharge valve- hydraulic connection fl ush with unit’s enclosure
Source (side) heat exchanger air
Finned coil exchanger made from copper tubes and aluminium fi ns. The aluminium fi ns are correctly spaced to guarantee op-timum heat exchange effi ciency. The differentiated circulation suitably distributes the liquid in the coil during the expansion phase. Coil with a sideways-V layout and diaphragm separating the fan chamber to ensure that the adjacent circuits are inde-pendently ventilated.
Electrical panel
Electric power and control panel, built to EN 60204-1/EC 204-1 standards, complete with:- control circuit transformer, - general door lock isolator, - fuses and contactors for compressors and fans, - auxiliary 4..20mA analogue input, - terminals for cumulative alarm block (BCA), - remote ON/OFF terminals, - relays for remote pump(s) activation for both circuits (only for
units without hydronic pumps), - spring-type control circuit terminal board, - electric panel for outdoor installation, - electrical board for outdoor installation, - electronic controller, - multi-language user keypad with LCD display, - IP54 protection. Power input: 400V~ ±10% - 50Hz - 3N.
Fan section
Double-asymmetrical and independent ventilation system com-posed by 450mm and 800 axial electric fans, protected to IP54, with external rotor and plastic-coated aluminium blades. Hou-sed in aerodynamic hoods complete with safety grille. 6 - pole electric motor with built-in overload protection. Differentiated ventilation control disabling the fan section of inactive circuits. Condensation control with continuous adjustment of fan rota-tion speed.
2.2 Certifi cation, reference standard
The unit complies with the following directives and relative amendments:- Machinery Directive: 2006/42/EC.- E.C.D. 89/336/EEC + 2004/108/EC.- Low Voltage Directive 2006/95/EC.- Pressure Equipment Directive 97/23/EC. Mod. A1.- TÜV-Italy 0948
2.3 Tests
Tests performed throughout the production process, as indica-ted in ISO9001. Performance or noise tests can be performed by highly qualifi ed staff in the presence of customers.Performance tests comprise the measurement of:
2. UNIT DESCRIPTION
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HFC R410A
UNIT DESCRIPTION
- electrical data- water � ow rates- working temperatures- power input- power output- pressure drops on the water-side exchanger both at full load
(at the conditions of selection and at the most critical condi-tions for the condenser) and at part load conditions.
During performance testing it is also possible to simulate the main alarm states.Noise tests are performed to check noise emissions according-to ISO3744.
2.4 Controller
The W3000SE Large controller offers advanced functions and algorithms.The keypad features an easy-to-use interface and a complete LCD display, allowing to consult and intervene on the unit by means of a multi-level menu, with selectable language setting. The regulation operates on both water circuits featuring the step-wise regulation referred to the return water temperature with proportional logic. This allows to satisfy simultaneously the different requests of both cooling and heating, with no need of mode setting. The diagnostics includes a complete alarm management, with the “black-box” and alarm logging functions for enhanced analy-sis of the unit operation. For multiple units’ systems, the regulation of the resources, via optional proprietary devices, can be implemented. Energy metering, for both consumption and capacity, can also be de-veloped. Supervision can be easily developed via proprietary devices or the integration in third party systems by means of the most common protocols as ModBus, Bacnet, Bacnet-over-IP, Echelon LonWorks. Compatibility with the remote keyboard managing up to 10 units.Availability of an internal real time clock for operation schedu-ling (4-day pro� les with 10 hour belts). The defrost adopts a proprietary self-adaptive logic, which fea-tures the monitoring of numerous operational parameters. This allows to reduce the number and duration of the defrost cycles, with a bene� t for the overall energy ef� ciency.
2.5 Versions
Unless one of the speci� c versions indicated below is expressly indicated, the unit is in the basic con� guration.
CA- Class A
Class A high-ef� ciency version for heat pump operation accor-ding to Eurovent criteria. This con� guration features an oversi-zed condensing section.
SL-CA Super low noise, Class A of effi ciency
Super Low-noise version, Class A of ef� ciency as per Eurovent. Acoustic insulation on the compressors box, on pipes and a low fans´ rotational speed gives the minimization of sound emis-sion.
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HFC R410A
2.6 Accessories
Cu/Cu condensing coils -Air-refrigerant heat exchanger with copper � ns and tubes.Recommended for applications in corrosive atmospheres.
Condensing coils with epoxy-coated � ns -Painted air-refrigerant heat exchanger.Recommended for applications in medium level pollution atmospheres.
Condensing coils with Fin Guard Silver treatment -Air-refrigerant heat exchanger with epoxidic treatment on coils and � ns.Recommended for marine exposure conditions, with an high level of pollution or other aggressive atmospheres.
Soft start -Electronic device adopted to manage the inrush current.Break down of the inrush current as soon as the electrical motor is switch on, lower motor’s mechanical wear, favoura-ble sizing for the electrical system.
Remote phase-sequence control -Relay for controlling the phase-sequence of mains.Protects loads against faults due to incorrect connection of the electric line.
Compressors’ on/off signal -Auxiliary contacts providing a voltage-free signal.Allows remote signalling of compressor’s activation or remo-te control of any auxiliary loads.
ModBUS connectivity -Interface module for ModBUS protocols.Allows integration with BMS operating with ModBUS proto-col.
BACnet connectivity -Interface module for BACnet protocols.Allows integration with BMS operating with BACnet protocol.
Echelon connectivity -Interface module for Echelon systems.Allows integration with BMS operating with Echelon proto-col.
HP and LP gauges -High and low pressure gauges.Allows immediate reading of the pressure values on both low and high pressure circuits.
Compressor suction valve -Shut-off solenoid valve on compressor’s suction circuit.Simplifi es maintenance activities.
Compr. discharge line valve -Shut-off solenoid valve on compressor discharge circuit.Simplifi es maintenance activities.
Automatic circuit breakers -Over-current switch on the major electrical loads.It protects compressors and/or fans from possible current peaks.
Input remote demand limit -Digital input (voltage free).It permits to limit the unit’s power absorption for safety rea-sons or in temporary situation.
Anti-intrusion grille -Anti-intrusion grille.Avoid the intrusion of solid bodies into the unit’s structure.
Numbered cables on electrical board -
BACnet OVER IP connectivity -Interface module for BACnet OVER-IP protocols.Allows to interconnect BACnet devices over Internet Proto-col within wide-area networks.
LT kit for low temperature -Extends the operating lints down to -10°C on SL versions and -12°C on CA versions.Allows unit operation in heating mode in strong winter con-ditions.
Enclosure & ext.conn. -Acoustic encolsure on both compressor and pump sec-tions (when applicable), water connections � ush with chiller enclosure.Noise emission reduction.
Side panels on the coils -Metallic panels on the coils (piping side only).Improve protection and unit’s aesthetics.
Reinforcing bars -Bars used to reinforce the structure.Improve resistance during long transportation.
UNIT DESCRIPTION
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3.1 CONTROL UNIT with LED display
The W3000Large control unit with liquid crystal display (LCD) is � tted on all the units. This keypad uses a user interface with a choice of seven European languages: Italian, English, French, German, Spanish, Swedish and Russian. This allows the con-trol unit interface to be chosen to suit the country of destination or, thanks to English, to be completely independent for all geo-graphical areas.
This type of operator panel is also available as a remote keypad, to be connected to the unit by means of a serial connection up to a maximum distance of 200 metres without a power supply (in this case, power is supplied by the unit), or a maximum of 500 metres with a dedicated local power supply.
It is possible to interface with commercially available BMS sy-stems as it is compatible with the BACnet, BAC- net OverIP, ModBUS and LonWorks protocols.
The Black Box stores 200 alarm events; these can be printed with any kind of personal computer.
The Internal Clock manages a weekly scheduler organised into time bands in order to optimise unit performance by mini-mising power consumption. Up to 10 daily time bands can be associated with different operating setpoints. As a result, power production is optimised during daily peaks of demand and mi-nimised during periods of inactivity, such as during the night. If there is no demand for hot or chilled water, the clock can switch the unit off and switch it back on later.
Heat adjustment is performed using algorithms based on proportional step control or on proportional/integral on the two probes at the inlet and outlet of the heat exchanger. There is also the QuickMind algorithm which was especially developed by Climaveneta to ensure the unit operates correctly even with systems featuring a low water content.
QuickMind is a special control unit which monitors the main operating parameters, predicts system behaviour and anticipa-tes unit settings in order to constantly optimise performance; it allows both return and delivery water temperatures to be cho-sen as adjustment parameters. It can reduce outlet temperatu-re � uctuations even with a small amount of water in the system. When, for dual-compressor chillers featuring a maximum of 12 start-ups per hour and using a traditional adjustment system, the minimum recommended water content is 5.5 l/kW, Quick-Mind ensures the same chiller operates correctly even with a water content of just 2.5 l/kW and considerably reduces outlet temperature � uctuations. The above graph shows that outlet temperature � uctuations with QuickMind are limited to 4.3°C as opposed to 7.54°C if the traditional adjustment system were used, without even ensuring an acceptable minimum compres-sor start time.
3. ELECTRONIC CONTROLLER
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HFC R410A
ELECTRONIC CONTROLLER
Remote keyboard
As an alternative to the standard keyboard, the NECS has a W3000 Compact operator panel with liquid crystal display. (LCD)
This keyboard employs a user interface with 3 European lan-guages that may be selected by the user, two of which are pre-set, and a further language of choice which may be French, German, Spanish, Swedish or Russian (to be speci� ed on or-
der). This allows the control unit interface to be chosen to suit the country of destination or, thanks to English, to be completely independent for all geographical areas.This same type of operator panel is also available as a remote keyboard, to be connected to the unit by means of a serial con-nection up to a maximum distance of 200 metres without power supply (in this case power is supplied by the unit), or a maxi-mum of 500 metres with dedicated local power supply.
SIZE 1314 1414 1614 1716 1816 2016 2116
BNECS-Q
4.1 GENERAL TECHNICAL DATA
COOLING (1)
Cooling capacity kW 353 377 412 452 496 546 567
Total power input (unit) kW 125 131 150 163 176 189 196EERESEER
Total sound power dB(A) 96 96 96 96 97 97 976565646464dB(A)Total sound pressure 6564
DIMENSIONS AND WEIGHTS (5)
LengthWidthHeightWeight
mm.mm.mm.kg.
3905226024503530
3905226024503620
3905226024503650
4515226024504850
5690226024505240
5690226024505370
5690226024505430
1 Plant (side) cooling exchanger water (in/out) 12/7 °C Source (side) heat exchanger air (in) 35 °C2 Plant (side) heating exchanger water (in/out) 40/45 °C Source (side) heat exchanger air (in) 7 °C R.H. 87%3 Plant (side) cooling exchanger water (in/out) 12/7 °C Source (side) heat exchanger air (in) 35 °C Plant (side) heating exchanger water (in/out) 40/45 °C Source (side) heat exchanger air (in) 7 °C R.H. 87%4 Sound power on the basis of measurements made in compliance with ISO 9614 and Eurovent 8/1 for Eurovent certified units; in compliance with ISO 3744 for non-certified units Average sound pressure level, at 10 (m.) distance, unit in a free field on a reflective surface; non-binding value obtained from the sound power level 5 Standard configuration - Not available
Total sound power dB(A) 98 98 98 99 99 9966656566dB(A)Total sound pressure 6666
DIMENSIONS AND WEIGHTS (5)
LengthWidthHeightWeight
mm.mm.mm.kg.
5690226024505480
7430226024506700
7430226024506830
7430226024507000
7430226024507030
7430226024507060
1 Plant (side) cooling exchanger water (in/out) 12/7 °C Source (side) heat exchanger air (in) 35 °C2 Plant (side) heating exchanger water (in/out) 40/45 °C Source (side) heat exchanger air (in) 7 °C R.H. 87%3 Plant (side) cooling exchanger water (in/out) 12/7 °C Source (side) heat exchanger air (in) 35 °C Plant (side) heating exchanger water (in/out) 40/45 °C Source (side) heat exchanger air (in) 7 °C R.H. 87%4 Sound power on the basis of measurements made in compliance with ISO 9614 and Eurovent 8/1 for Eurovent certified units; in compliance with ISO 3744 for non-certified units Average sound pressure level, at 10 (m.) distance, unit in a free field on a reflective surface; non-binding value obtained from the sound power level 5 Standard configuration - Not available
Total sound power dB(A) 97 97 97 97 98 98 986565656565dB(A)Total sound pressure 6564
DIMENSIONS AND WEIGHTS (5)
LengthWidthHeightWeight
mm.mm.mm.kg.
5080226024503850
5080226024503950
5080226024503980
6255226024505460
7430226024505740
7430226024505890
7430226024505970
1 Plant (side) cooling exchanger water (in/out) 12/7 °C Source (side) heat exchanger air (in) 35 °C2 Plant (side) heating exchanger water (in/out) 40/45 °C Source (side) heat exchanger air (in) 7 °C R.H. 87%3 Plant (side) cooling exchanger water (in/out) 12/7 °C Source (side) heat exchanger air (in) 35 °C Plant (side) heating exchanger water (in/out) 40/45 °C Source (side) heat exchanger air (in) 7 °C R.H. 87%4 Sound power on the basis of measurements made in compliance with ISO 9614 and Eurovent 8/1 for Eurovent certified units; in compliance with ISO 3744 for non-certified units Average sound pressure level, at 10 (m.) distance, unit in a free field on a reflective surface; non-binding value obtained from the sound power level 5 Standard configuration - Not available
Total sound power dB(A) 99 99 99 100 100 10067666666dB(A)Total sound pressure 6767
DIMENSIONS AND WEIGHTS (5)
LengthWidthHeightWeight
mm.mm.mm.kg.
7430226024506020
9780226024507350
9780226024507500
9780226024507700
9780226024507740
9780226024507770
1 Plant (side) cooling exchanger water (in/out) 12/7 °C Source (side) heat exchanger air (in) 35 °C2 Plant (side) heating exchanger water (in/out) 40/45 °C Source (side) heat exchanger air (in) 7 °C R.H. 87%3 Plant (side) cooling exchanger water (in/out) 12/7 °C Source (side) heat exchanger air (in) 35 °C Plant (side) heating exchanger water (in/out) 40/45 °C Source (side) heat exchanger air (in) 7 °C R.H. 87%4 Sound power on the basis of measurements made in compliance with ISO 9614 and Eurovent 8/1 for Eurovent certified units; in compliance with ISO 3744 for non-certified units Average sound pressure level, at 10 (m.) distance, unit in a free field on a reflective surface; non-binding value obtained from the sound power level 5 Standard configuration - Not available
Total sound power dB(A) 88 88 88 89 89 90 905757565656dB(A)Total sound pressure 5757
DIMENSIONS AND WEIGHTS (5)
LengthWidthHeightWeight
mm.mm.mm.kg.
4515226024503760
5080226024503900
5080226024504050
5690226024505350
5690226024505490
6865226024505780
7430226024505890
1 Plant (side) cooling exchanger water (in/out) 12/7 °C Source (side) heat exchanger air (in) 35 °C2 Plant (side) heating exchanger water (in/out) 40/45 °C Source (side) heat exchanger air (in) 7 °C R.H. 87%3 Plant (side) cooling exchanger water (in/out) 12/7 °C Source (side) heat exchanger air (in) 35 °C Plant (side) heating exchanger water (in/out) 40/45 °C Source (side) heat exchanger air (in) 7 °C R.H. 87%4 Sound power on the basis of measurements made in compliance with ISO 9614 and Eurovent 8/1 for Eurovent certified units; in compliance with ISO 3744 for non-certified units Average sound pressure level, at 10 (m.) distance, unit in a free field on a reflective surface; non-binding value obtained from the sound power level 5 Standard configuration - Not available
Total sound power dB(A) 91 91 91 92 92 9259585858dB(A)Total sound pressure 5959
DIMENSIONS AND WEIGHTS (5)
LengthWidthHeightWeight
mm.mm.mm.kg.
7430226024506130
7430226024507020
8605226024507330
9780226024507600
9780226024507750
9780226024507910
1 Plant (side) cooling exchanger water (in/out) 12/7 °C Source (side) heat exchanger air (in) 35 °C2 Plant (side) heating exchanger water (in/out) 40/45 °C Source (side) heat exchanger air (in) 7 °C R.H. 87%3 Plant (side) cooling exchanger water (in/out) 12/7 °C Source (side) heat exchanger air (in) 35 °C Plant (side) heating exchanger water (in/out) 40/45 °C Source (side) heat exchanger air (in) 7 °C R.H. 87%4 Sound power on the basis of measurements made in compliance with ISO 9614 and Eurovent 8/1 for Eurovent certified units; in compliance with ISO 3744 for non-certified units Average sound pressure level, at 10 (m.) distance, unit in a free field on a reflective surface; non-binding value obtained from the sound power level 5 Standard configuration - Not available
Operating limits in silent-running modeOperating limits in non-silent-running mode. In these conditions, ventilation is automatically increased to assu-re correct unit operation.
NECS-Q/SL-CA
HEAT PUMP
COOLING
Air Temperature [°C]Pla
nt
(sid
e)
he
ati
ng
ex
ch
an
ge
r w
ate
r [°
C]
Plant (side) cooling exchanger water [°C]
Air
Te
mp
era
ture
[°C
]
COOLING AND HEATING
Plant (side) cooling exchanger water [°C]Pla
nt
(sid
e)
he
ati
ng
ex
ch
an
ge
r w
ate
r [°
C]
44 NECS-Q_1314_3218_201005_GB
NECS-Q
HFC R410A
ETHYLENE GLYCOL MIXTURE
Ethylene glycol and water mixtures, used as a heat-conveying fl uid, cause changes in unit performance. For correct data, use the factors indicated in the following table.
Freezing point (°C)
0 -5 -10 -15 -20 -25 -30 -35
Ethylene glycol percentage by weight
0 12% 20% 30% 35% 40% 45% 50%
cPf 1 0,985 0,98 0,974 0,97 0,965 0,964 0,96
cQ 1 1,02 1,04 1,075 1,11 1,14 1,17 1,2
cdp 1 1,07 1,11 1,18 1,22 1,24 1,27 1,3
cPf cooling power correction factorcQ: fl ow correction factorcdp: pressure drop correction factor
For data concerning other kind of anti-freeze solutions (e.g. propylene glycol) please contact our Sales Department.
Water fl ow in the heat exchangers is given by:Q=Px0,86/Dt
Q: water fl ow (m3/h)Dt: difference between inlet and outlet water temp. (°C)P: heat exchanger capacity (kW)
Pressure drop is given by:Dp= K x Q2/1000
Q: water fl ow (m3/h)Dp: pressure drop (kPa)K: unit size ratio
6. HYDRAULIC DATA
Q min: minimum water fl ow admitted to the heat exchanger.Q max: maximum water fl ow admitted to the heat exchanger.W.c. min: minimum water content admitted in the plant, using
traditional control logic.
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HFC R410A
The units can be supplied with a hydronic group. This houses all the main hydraulic components, thereby optimising hydraulic and electric installation space, time and cost. The innovative QuickMind control fi tted to the units in the NECS system, has been designed to work on systems with a low water content, offering highly professional alternatives to the installation of sy-stems featuring storage units.
The integrated hydronic unit is composed of:Single or twin IN-LINE centrifuge pump.-differential pressure switch on the exchanger-drain taps-air vent-anti-freeze heater for piping-
Available pump confi gurations:
Hydronic kit with one IN-LINE 2-pole low-head pump-Hydronic kit with one IN-LINE 2-pole high-head pump-Hydronic kit with IN-LINE 2-pole low-head twin pumps pump-Hydronic kit with IN-LINE 2-pole high-head twin pumps-
2-pole low head pump
Centrifugal pumps with in-line suction and delivery fl anges, in single and twin versions. Pump body in cast iron and impeller in AISI 316L stainless steel or cast-iron, entirely laser technology welded. Mechanical seal with components in ceramics, carbon and EPDM elastomers. Three-phase electric motor protected to IP55, insulation class F, suitable for continuous service.
2-pole high-head pump
All versions of the hydronic unit can be supplied with a high head pump. In these cases, the pump features a two-pole motor even in the silent-running versions.
Twin pump
A second stand-by pump for high or low pressures is availa-ble on request. The pumps are automatically exchanged on the basis of a rotation programme and the stand-by pump cuts in automatically if the primary pump fails.
GENERAL CHARACTERISTICS
Water-side mechanical fi lter (optional)
Y-fi lter designed and built to capture the impurities in the hy-draulic circuit. It is fi tted with a 0.9 mm stainless steel mesh car-tridge which can be replaced without removing the valve body from the piping.
Unit electrical panel
The unit electrical panel is fi tted with fuses and a circuit breaker contactor.
Special pumps
For pumps with different confi gurations, please contact our sales department.
Additional components
The supply does not include the following accessories though these are recommended to ensure correct system operation:- MA Pressure gauges upline and downline from the unit- GF Flexible joints on piping- RI On-off valves- T Outlet control thermometer
7. HYDRONIC GROUPS (Optional)
47 NECS-Q_1314_3218_201005_GB HFC R410A
NECS-Q
P
RETURN FROM HYDRAULIC SYSTEM
DISCHARGE TO HYDRAULIC SYSTEM
S1
S2
EV
SF
SC
Pd
P
P
RETURN FROM HYDRAULIC SYSTEM
DISCHARGE TO HYDRAULIC SYSTEM
S3
S4
CD
SF
SC
Pd
P
CONFIGURATION OF HYDRONIC UNIT WITH 1/2 IN-LINE PUMPS
HYDRONIC GROUPS (Optional)
Components of the hydronic kit:EV Plant (side) cooling exchanger water -CD Plant (side) heating exchanger water-P Water pump-Pd Water differential pressure switch -SC Drain valve-SF Purge valve-S1 Exchanger water inlet probe -S2 Exchanger water ounlet probe -S3 Exchanger water inlet probe -S4 Exchanger water ounlet probe -
48 NECS-Q_1314_3218_201005_GB
NECS-Q
HFC R410A
LOW HEAD – SINGLE IN-LINE PUMP - PLANT (SIDE) COOLING EXCHANGER WATER
(1) Values refer to rated operating conditionsPf Cooling capacity of unitQ Flow of water to evaporatorF.L.I. Power absorbed by pumpF.L.A. Current absorbed by pumpHp Head of pump
KP Coeffi cients for calculating pressure drops Unit with hydronic unit without network fi lterDpu Total pressure drop of hydronic groupHu Working head
PUMP SPECIFICATIONS
Pf (1) Q (1) Rif. N. poli F.L.I. F.L.A. Hp KP Dpu Hu
LOW HEAD – TWIN IN-LINE PUMP - PLANT (SIDE) COOLING EXCHANGER WATER
(1) Values refer to rated operating conditionsPf Cooling capacity of unitQ Flow of water to evaporatorF.L.I. Power absorbed by pumpF.L.A. Current absorbed by pumpHp Head of pump
KP Coeffi cients for calculating pressure drops Unit with hydronic unit without network fi lterDpu Total pressure drop of hydronic groupHu Working head
PUMP SPECIFICATIONS
Pf (1) Q (1) Rif. N. poli F.L.I. F.L.A. Hp KP Dpu Hu
HIGH HEAD 2 POLES - SINGLE IN-LINE PUMP - PLANT (SIDE) COOLING EXCHANGER WATER
(1) Values refer to rated operating conditionsPf Cooling capacity of unitQ Flow of water to evaporatorF.L.I. Power absorbed by pumpF.L.A. Current absorbed by pumpHp Head of pump
KP Coeffi cients for calculating pressure drops Unit with hydronic unit without network fi lterDpu Total pressure drop of hydronic groupHu Working head
PUMP SPECIFICATIONS
Pf (1) Q (1) Rif. N. poli F.L.I. F.L.A. Hp KP Dpu Hu
HIGH HEAD 2 POLES – TWIN IN-LINE PUMP - PLANT (SIDE) COOLING EXCHANGER WATER
(1) Values refer to rated operating conditionsPf Cooling capacity of unitQ Flow of water to evaporatorF.L.I. Power absorbed by pumpF.L.A. Current absorbed by pumpHp Head of pump
KP Coeffi cients for calculating pressure drops Unit with hydronic unit without network fi lterDpu Total pressure drop of hydronic groupHu Working head
PUMP SPECIFICATIONS
Pf (1) Q (1) Rif. N. poli F.L.I. F.L.A. Hp KP Dpu Hu
F.L.I. Full load power input at max admissible conditionF.L.A. Full load current at max admissible conditionL.R.A. Locked rotor amperes for single compressorS.A. Starting current
(1) Values calculated referring to the version with the maximum number of fans working at the max absorbed current
(2) Safety values to be considered when cabling the unit for power supply and line-protections
Power supply: 400/3/50Voltage tolerance: 10%Maximum voltage unbalance: 3%
8. ELECTRICAL DATA
NECS-Q/B
Give the typical operating conditions of units designed for outdoor installation, which can be associated (according to reference document IEC 60721) to the following classes:- climatic conditions class 4K4H: air temperature range from -20 up to 55°C (*), relative humidity range from 4 up to 100%, with possible precipita-
tions, at air pressure from 70 and 106 kPa and a maximum solar radiation of 1120 W/m2 - special climatic conditions negligible- biological conditions class 4B1 and 4C2: locations in a generic urban area- mechanically active substances class 4S2: locations in areas with sand or dust representative of urban areas- mechanical conditions class 4M1: locations protected from signifi cant vibrations or shocks. The required protection level for safe operation, according to reference document IEC 60529, is IP43XW (protection against access, to the most critical unit’s parts, of external devices with diameter larger than 1 mm and rain). The unit can be considered IP44XW protected, i.e. protected against access of external devices (with diameter larger than 1 mm) and water in gene-ral.
(*) for the unit’s operating limits, see “selection limits” section.
F.L.I. Full load power input at max admissible conditionF.L.A. Full load current at max admissible conditionL.R.A. Locked rotor amperes for single compressorS.A. Starting current
(1) Values calculated referring to the version with the maximum number of fans working at the max absorbed current
(2) Safety values to be considered when cabling the unit for power supply and line-protections
Power supply: 400/3/50Voltage tolerance: 10%Maximum voltage unbalance: 3%
ELECTRICAL DATA
NECS-Q/CA
Give the typical operating conditions of units designed for outdoor installation, which can be associated (according to reference document IEC 60721) to the following classes:- climatic conditions class 4K4H: air temperature range from -20 up to 55°C (*), relative humidity range from 4 up to 100%, with possible precipita-
tions, at air pressure from 70 and 106 kPa and a maximum solar radiation of 1120 W/m2 - special climatic conditions negligible- biological conditions class 4B1 and 4C2: locations in a generic urban area- mechanically active substances class 4S2: locations in areas with sand or dust representative of urban areas- mechanical conditions class 4M1: locations protected from signifi cant vibrations or shocks. The required protection level for safe operation, according to reference document IEC 60529, is IP43XW (protection against access, to the most critical unit’s parts, of external devices with diameter larger than 1 mm and rain). The unit can be considered IP44XW protected, i.e. protected against access of external devices (with diameter larger than 1 mm) and water in gene-ral.
(*) for the unit’s operating limits, see “selection limits” section.
F.L.I. Full load power input at max admissible conditionF.L.A. Full load current at max admissible conditionL.R.A. Locked rotor amperes for single compressorS.A. Starting current
(1) Values calculated referring to the version with the maximum number of fans working at the max absorbed current
(2) Safety values to be considered when cabling the unit for power supply and line-protections
Power supply: 400/3/50Voltage tolerance: 10%Maximum voltage unbalance: 3%
ELECTRICAL DATA
NECS-Q/SL-CA
Give the typical operating conditions of units designed for outdoor installation, which can be associated (according to reference document IEC 60721) to the following classes:- climatic conditions class 4K4H: air temperature range from -20 up to 55°C (*), relative humidity range from 4 up to 100%, with possible precipita-
tions, at air pressure from 70 and 106 kPa and a maximum solar radiation of 1120 W/m2 - special climatic conditions negligible- biological conditions class 4B1 and 4C2: locations in a generic urban area- mechanically active substances class 4S2: locations in areas with sand or dust representative of urban areas- mechanical conditions class 4M1: locations protected from signifi cant vibrations or shocks. The required protection level for safe operation, according to reference document IEC 60529, is IP43XW (protection against access, to the most critical unit’s parts, of external devices with diameter larger than 1 mm and rain). The unit can be considered IP44XW protected, i.e. protected against access of external devices (with diameter larger than 1 mm) and water in gene-ral.
(*) for the unit’s operating limits, see “selection limits” section.
Plant (side) cooling exchanger water (in/out) 12/7 °CSource (side) heat exchanger air (in) 35 °CSound power on the basis of measurements made in compliance with ISO 9614 and Eurovent 8/1 for Eurovent certified units; in compliance with ISO 3744 for non-certified units Such certification refers specifically to the sound Power Level in dB(A). This is therefore the only acoustic data to be considered as binding.
Working conditions
SIZE Octave band [Hz] at 10 m2000100050025012563 80004000
Plant (side) cooling exchanger water (in/out) 12/7 °CSource (side) heat exchanger air (in) 35 °CAverage sound pressure level, at 10 (m.) distance, unit in a free field on a reflective surface; non-binding value obtained from the sound power level
The sound power and pressure levels of /B version, are reduced of 2 dB(A) when present the option "compressors and pumps acoustical enclosure". Additional soundproofing
Plant (side) cooling exchanger water (in/out) 12/7 °CSource (side) heat exchanger air (in) 35 °CSound power on the basis of measurements made in compliance with ISO 9614 and Eurovent 8/1 for Eurovent certified units; in compliance with ISO 3744 for non-certified units Such certification refers specifically to the sound Power Level in dB(A). This is therefore the only acoustic data to be considered as binding.
Working conditions
SIZE Octave band [Hz] at 10 m2000100050025012563 80004000
Plant (side) cooling exchanger water (in/out) 12/7 °CSource (side) heat exchanger air (in) 35 °CAverage sound pressure level, at 10 (m.) distance, unit in a free field on a reflective surface; non-binding value obtained from the sound power level
The sound power and pressure levels of /CA version, are reduced of 2 dB(A) when present the option "compressors and pumps acoustical enclosure". Additional soundproofing
Plant (side) cooling exchanger water (in/out) 12/7 °CSource (side) heat exchanger air (in) 35 °CSound power on the basis of measurements made in compliance with ISO 9614 and Eurovent 8/1 for Eurovent certified units; in compliance with ISO 3744 for non-certified units Such certification refers specifically to the sound Power Level in dB(A). This is therefore the only acoustic data to be considered as binding.
Working conditions
SIZE Octave band [Hz] at 10 m2000100050025012563 80004000
Plant (side) cooling exchanger water (in/out) 12/7 °CSource (side) heat exchanger air (in) 35 °CAverage sound pressure level, at 10 (m.) distance, unit in a free field on a reflective surface; non-binding value obtained from the sound power level
Pipe threads where pressure-tight joints are not made on the threads - Designation, dimensions and tolerances.
Used terminology:
G: Pipe threads where pressure-tight joints are not made on the threads
A: Close tolerance class for external pipe threads where pres-sure-tight joints are not made on the threads
B: Wider tolerance class for external pipe threads where pres-sure-tight joints are not made on the threads
Internal threads: G letter followed by thread mark (only toler-ance class)
External threads: G letter followed by thread mark and by A let-ter for A class external threads or by B letter for B class external threads.
UNI ISO 7/1
Pipe threads where pressure-tight joints are made on the threads - Designation, dimensions and tolerances.
Used terminology:
Rp: Internal cylindrical threads where pressure-tight joints are made on the threads
Rc: Internal conical threads where pressure-tight joints are made on the threads
R: External conical threads where pressure-tight joints are made on the threads
Internal cylindrical threads: R letter followed by p letterInternal conical threads: R letter followed by c letterExternal conical threads: R letter
Designation Description
UNI ISO 7/1 - Rp 1 1/2Internal cylindrical threads where pressure-tight joints are made on the threads, defi ned by stand-ard UNI ISO 7/1Conventional ø 1 1/2”
UNI ISO 7/1 - Rp 2 1/2Internal cylindrical threads where pressure-tight joints are made on the threads, defi ned by stand-ard UNI ISO 7/1Conventional ø 2 1/2”
UNI ISO 7/1 - Rp 3Internal cylindrical threads where pressure-tight joints are made on the threads, defi ned by stand-ard UNI ISO 7/1Conventional ø 3”
UNI ISO 7/1 - R 3External conical threads where pressure-tight joints are made on the threads, defi ned by standard UNI ISO 7/1 Conventional ø 3”
UNI ISO 228/1 - G 4 B
Internal cylindrical threads where pressure-tight joints are not made on the threads, defi ned by standard UNI ISO 228/1Tolerance class B for external threadConventional ø 4”
DN 80 PN 16Flange Nominal Diameter: 80 mm th.Nominal Pressure: 16 bar
Notes:
Conventional diameter value [in inches] identifi es short thread designation, based upon the relative standard. All relative values are defi ned by standards.As example, here below some values:
UNI ISO 7/1 UNI ISO 228/1
Conventional ø 1” 1”
Pitch 2.309 mm 2.309 mm
External ø 33.249 mm 33.249 mm
Core ø 30.291 mm 30.291 mm
Thread height 1.479 mm 1.479 mm
11. KEY TO HYDRAULIC CONNECTIONS
A3 NECS-Q_1314_3218_201005_GB
NECS-Q
HFC R410A
Topqualität mit Spitzenservice
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