Reversible unit, air source for outdoor installation NECS_N_0202T_0612T_201211_EN r HFC R-410A (The photo of the unit is indicative and may change depending on the model) Climaveneta Technical Bulletin 0202T - 0612T 53 - 159 kW NECS-N Maximum reliability Ease of maintenance Efficiency Integrated hydronic unit
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Reversible unit, air source for outdoor installation
NECS_N_0202T_0612T_201211_EN
r HFCR-410A
(The photo of the unit is indicative and may change depending on the model)
Climaveneta Technical Bulletin
0202T - 0612T53 - 159 kW
NECS-N
Maximum reliabilityEase of maintenance Efficiency Integrated hydronic unit
II NECS-N_0202T_0612T
NECS-N
HFC R410A
SUMMARYNECS-N
0202T - 0612T
Liability disclaimerThis 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 Office 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 modified without prior notice.
1. Product presentation 1.1 Maximum reliability 1.2 Ease of maintenance 1.3 Efficiency 1.4 Hydronic unit 1.5 Demand limit 1.6 Low-Noise versions
2. Unit description 2.1 Standard unit composition 2.2 Tests 2.3 Reference standards 2.4 Available versions 2.5 Accessories
3. Electronic controller4. Technical data
4.1 General technical data 4.2 Cooling capacity performance 4.3 Heat pump capacity performance
Company quality system certified to UNI EN ISO 9001
This company par-ticipates in the EuroventCertification Programme.The products are listed in theDirectory of certified products.
Eurovent certification applied to units with cool-
ing capacity up to 1500 kW for air cooled water chillers
and water cooled liquid chillers
III NECS-N_0202T_0612T
NECS-N
HFC R410A
This section contains general information on the NECS-N range of products. For detailed information refer to the specific sec-tions in this bulletin.
NECS-N unitsNECS-N 0202T-0612T is a range of air-condensed reversible units with R410A rotary Scroll compressors working on two separate and independent circuits and a shell and tube heat exchanger.This new NECS-N series has been designed to meet specific application requirements where continuity of operation needs to be ensured.
1.1 maximum reliabilityUnit with dual-circuit refrigerant section designed to ensure maximum efficiency at full load, ensuring continuity without in-terruption of operation in the event of temporary stop of one of the 2 circuits.
1.2 Ease of maintenanceShell and tube heat exchanger with low pressure drops, for use with very hard water. This the best solution for industrial proc-ess control applications.
1.3 EfficiencyStepless fan speed condensation control achieved via a phase-cutting device. This optimizes power consumption by adapting condensation to any environmental condition, whilst assuring minimum noise from the ventilation unit.
1.4 Hydronic unitThe integrated hydronic unit includes the main hydraulic com-ponents, including a low- or high-head pump. Shutoff valves upstream and downstream from each pump to facilitate re-placement operations without having to drain the hydraulicsystem. Automatic pump rotation system in the event of a breakdown without interrupting operation (only for units with a dual pump).
1.5 Demand LimitDigital input for enabling the restriction of maximum power of the unit output to a preset value. The function can be used as a load protection or energy saver system.
1.6 Low-Noise versionsThe silenced version (LN) is available for all sizes. Here, low noise levels are achieved by reducing the speed of rotation of the fans and increasing the insulation of the compressor cham-ber.
1. PRODUCT PRESENTATION
1 NECS-N_0202T_0612T
NECS-N
HFC R410A
Outdoor reversible heat pump for the production of chilled/hot water with hermetic rotary Scroll compressors, axial-flow fans, shell and tubes heat exchanger and thermostatic expansion valve. External panels in Peraluman and structure in aluminium sections. The range is equipped with two compressors on two independent refrigerant circuits.
2.1 Standard unit composition
Structure Specific structure for outdoor installation, made with a hot-gal-vanised sheet steel base of adequate thickness, painted with polyester powders. Specific panelling for outdoor installation in aluminium alloy which ensures total resistance to atmospheric agents, easily removable, made in such a way as to allow total access to the internal components to facilitate inspection and maintenance work. Two independent sections for both ventila-tion and compressors. Cooling circuitMain components of the cooling circuit:- two independent circuits - R410A coolant- thermostatic expansion valves- dehydrator filter- coolant line sight glass with humidity indicator- high pressure safety valve- low pressure safety valve- high and low pressure transducers- high pressure safety switches- liquid receiver- liquid line check valve (sizes 0452..0612)- 4-way reverse cycle valves
CompressorsHermetic scroll compressors complete with an oil sump heater, electronic overheating protection with centralised manual reset and a two-pole electric motor.
User side exchangerDirect expansion multi-circuit shell and tube exchanger with asymmetric side coolant flows for maintaining the coolant at the correct speed inside the tubes when passing from the liquid to the gas phase. Steel shell with foamed closed-cell elastomer anti-condensation lining. The shell & tube is manufactured us-ing 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 source side exchangerFinned coil exchanger made from copper tubes and aluminium fins. The aluminium fins are correctly spaced to guarantee op-timum heat exchange efficiency. The differentiated circulation suitably distributes the liquid in the coil during the expansion phase.
Electric power and control panelElectric power and control panel, built to EN 60204-1/EC 204-1 standards, complete with:- control circuit transformer,- general door lock isolator,- numbered cables,- power contactors for compressors and fans,- continuous fans speed management controllers,
Heat source side fan sectionFinned package heat exchanger featuring copper tubes and aluminium fins suitably spaced to optimise heat exchange per-formance.
Pumps (where present)Horizontal one-piece centrifugal pump with one impeller, axial suction and radial delivery, DIN GG20 cast iron body and AISI 316L stainless steel or cast iron impeller. The section of the shaft in contact with the liquid is made by stainless steel. Me-chanical seal with components in ceramics, carbon and NBR elastomers. Three-phase electric motor with IP55 protection class, insulation class F, suitable for continuous service. Shut-off valves upstream and downstream from each pump to facili-tate replacement operations without having to drain the hydrau-lic system. Automatic pump rotation system in the event of a breakdown without interrupting operation (only in units with a dual pump).
2.2 TestsTests performed throughout the production process, as indicat-ed in ISO9001. Performance or noise tests can be performed by highly qualified staff in the presence of customers.Performance tests comprise the measurement of:- electrical data- water flow 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 conditions 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.
2.3 Reference standardsThe machine complies with the following directives and their amendments:- 2006/42/CE Machinery Directive.- E.C.D. 89/336/EEC + 2004/108/EC.- 2006/95/EC Low Voltage Directive.- 97/23/EC Pressure Equipment Directive . Module A1. TÜV-Italia 0948
Controller W3000 Base / W3000SE Compact The controller can be chosen as:- W3000 Base: keypad and LED display- W3000SE Compact: the keypad features an easy-to-use in-terface and a complete LCD display, allowing to consult and intervene on the unit by means of a multi-level menu, with se-lectable language setting. The diagnostics includes a complete alarm management, with the “black-box” and alarm logging functions for enhanced anal-ysis of the unit operation. Compatibility with the remote keyboard managing up to 10 units.Availability of an internal real time clock for operation schedul-ing (4-day profiles with 10 hour belts).Common features: The regulation is based on the exclusive QuickMind algorithm, including self-adaptive control logics,
2. UNIT DESCRIPTION
2 NECS-N_0202T_0612T
NECS-N
HFC R410A
beneficial in low water content systems. As alternatives the pro-portional- or proportional-integral regulations are also available.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.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 benefit for the overall energy efficiency.
2.4 Available versionsB-Base Standard model.
LN- Low noise Low noise version. This confi guration features special sound-proofi ng for the compressor chamber and reduced fan speed. Fan speed is automatically increased if environmental condi-tions are particularly tough.
2.5 Accessories- Cu/Cu condensing coilsAir-refrigerant heat exchanger with copper fins and tubes.Recommended for applications in corrosive atmospheres.
- Condensing coils with epoxy-coated finsPainted air-refrigerant heat exchanger.Recommended for applications in medium level pollution at-mospheres.
- Condensing coils with Fin Guard Silver treatmentAir-refrigerant heat exchanger with epoxidic treatment on coils and fins.Recommended for marine exposure conditions, with an high level of pollution or other aggressive atmospheres.
- Soft startElectronic 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, favourable sizing for the electrical system.
- Remote phase-sequence controlRelay for controlling the phase-sequence of mains. Protects loads against faults due to incorrect connection of the electric line.
- Compressors’ on/off signalAuxiliary contacts providing a voltage-free signal.Allows remote signalling of compressor’s activation or remote control of any auxiliary loads.
- ModBUS connectivityInterface module for ModBUS protocols.Allows integration with BMS operating with ModBUS protocol.
- BACnet connectivityInterface module for BACnet protocols.Allows integration with BMS operating with BACnet protocol.
- Echelon connectivityInterface module for Echelon systems.Allows integration with BMS operating with LonWorks procotls.
- HP AND LP GAUGESHigh and low pressure gauges.Allows immediate reading of the pressure values on both low and high pressure circuits.
- Compr. Discharge line valveShut-off solenoid valve on compressor discharge circuit.Simplifies maintenance activities.
- Cond. Coil protection netCoil protecting net.Protects against the intrusion of solid bodies with mediumlarge dimensions.
- Var.Fan speed low amb.ControlAcoustic encolsure on both compressor and pump sections (when applicable)Noise emission reduction.
- W3000 compact visual displayLCD display keyboard type W3000 Compact.Easy of use, multi-language user interface, remote unit’s con-trol.
- Prearrangement for remoteLCD display keyboard type W3000 Compact.Easy of use, multi-language user interface, remote unit’s con-trol.
- Container packing
- BACnet OVER IP connectivityInterface module for BACnet OVER-IP protocols.Allows to interconnect BACnet devices over Internet Protocol within wide-area networks.
- AUX 4-20mA REMOTE D L.C.4..20mA analogue input, voltage-free digitale input. Allows to change the operating set-point according to value of current ap-plied to 4..20mA input and to limit the unit’s power (by activating the digital input).Enforce Energy Saving policy, ensure safety operation.
- LT kit for low temperatureExtends the operating limits down to -10°C, applicable on LN versions only.Allows unit operation in heating mode in strong winter condi-tions.
3 NECS-N_0202T_0612T
NECS-N
HFC R410A
Control unit with LCD display (standard)The new “W3000 Base” control unit is installed on all units.
Main functions: QuickMind, local and remote FWS supervi-sion, dual setpoint management, etc., confirm Climaveneta’s commitment to continually developing its electronics technol-ogy. The heat pumps, moreover, are fitted with the original Cli-maveneta defrosting control system called “Autotuning Defrost” which considerably reduces defrosting times, thus improving the energy performance of the unit. Interfaces with BMS sys-tems: METASYS®, MODBUS®, LONWORKS®, SIEMENS®, TREND®.
Black Box logs data relative to 200 alarm events which can be printed with a personal computer.
QuickMind is a special control unit which monitors the main op-erating parameters, predicts system behaviour and anticipates unit settings in order to constantly optimise performance; it al-lows both return and delivery water temperatures to be chosen
as adjustment parameters. It can reduce outlet temperature fluctuations 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 fluctuations. The following graph shows that outlet temperature fluctuations with QuickMind are limited to 4.3 °C as opposed to 7.45 °C if the traditional adjustment system were used, without even ensuring an acceptable minimum compres-sor start time.
3. ELECTRONIC CONTROLLER
2
3
5
4
65.9
4.56
7.54
11.34
3 3
3.93.3 3.2 3.1
7
8
10
9
Out
put
tem
per
atur
e (°
C)
Variation output temperature
11
12
0.5 1.5 2.5 3.5 4.5 5.5 6.5 7.5 8.5 9.5
4.3
3.53
Minimum water content in the plant lt/kW
11.510.5
3.52 3.52 3.52 3.52 3.523,68 3.52
Not acceptable minimum starting time compressor
Step-wise regulation
Quickmind
4 NECS-N_0202T_0612T
NECS-N
HFC R410A
Control unit with LCD display (optional) - Remote keyboardAs 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 specified on or-
der). This allows the control unit interface to be chosen to suit the country of destination or, thanks to English, to be complete-ly 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.
NoteThe remote keyboard may be connected to the unit without re-placing the W3000 Base operator panel originally provided on the unit. In this case the interface fitted locally on the unit is ex-cluded, and access to the programming menus and the display of the machine status is present only the additional keyboard at remote level.
Instead, when the W3000 Base operator panel is replaced with the W3000 Compact panel, control of the unit is possible at both local and remote level. In this case the remote keyboard faithfully reproduces what is shown on the control unit on board the machine, further facilitating all the operations of configuring and controlling the unit.
PERFORMANCECOOLING ONLY (GROSS VALUE)Cooling capacity (1) kW 50,3 57,5 72,0 82,5 93,9 107 120 138 151Total power input (1) kW 18,4 20,4 28,0 32,0 36,0 39,8 44,0 50,4 58,9EER (1) 2,73 2,82 2,57 2,58 2,61 2,68 2,73 2,73 2,56ESEER (1) 3,52 3,59 3,31 3,30 3,31 3,39 3,45 3,46 3,26COOLING ONLY (EN14511 VALUE)Cooling capacity (1)(2) kW 50,2 57,4 71,8 82,3 93,7 106 120 137 150EER (1)(2) 2,72 2,80 2,55 2,55 2,59 2,65 2,71 2,70 2,53ESEER (1)(2) 3,48 3,53 3,25 3,25 3,26 3,33 3,39 3,38 3,18Cooling energy class C C D D D D C C DHEATING ONLY (GROSS VALUE)Heating capacity (3) kW 55,1 65,2 81,0 93,5 105 121 136 156 172Total power input (3) kW 18,6 21,2 26,1 29,8 33,9 37,9 42,3 48,4 54,4COP (3) 2,96 3,08 3,10 3,14 3,11 3,18 3,21 3,23 3,17HEATING ONLY (EN14511 VALUE)Heating capacity (3)(2) kW 55,2 65,3 81,2 93,8 106 121 136 157 173COP (3)(2) 2,95 3,06 3,09 3,12 3,09 3,16 3,19 3,21 3,15Cooling energy class C B B B B B B A BEXCHANGERSHEAT EXCHANGER USER SIDE IN REFRIGERATIONWater flow (1) m³/h 8,65 9,90 12,4 14,2 16,2 18,4 20,7 23,7 25,9Pressure drop (1) kPa 5,60 7,29 11,6 15,1 11,9 15,4 14,1 19,6 23,4HEAT EXCHANGER USER SIDE IN HEATINGWater flow (3) m³/h 9,58 11,3 14,1 16,2 18,3 21,0 23,6 27,2 30,0Pressure drop (3) kPa 6,86 9,54 14,9 19,8 15,3 20,0 18,4 25,8 31,4COMPRESSORSN. of compressors N° 2 2 2 2 2 2 2 2 2Number of capacity N° 2 2 2 2 2 2 2 2 2No. of circuits N° 2 2 2 2 2 2 2 2 2Regulation STEPS STEPS STEPS STEPS STEPS STEPS STEPS STEPS STEPSMin. capacity step % 50 50 50 50 50 50 50 50 50Refrigerant R410A R410A R410A R410A R410A R410A R410A R410A R410ARefrigerant charge kg 19,0 22,0 22,0 23,0 27,0 30,0 36,0 41,0 46,0Oil charge kg 6,50 6,50 6,50 7,95 9,40 10,8 13,6 13,1 12,6FANSQuantity N° 6 6 6 6 8 8 10 10 10Air flow m³/s 7,98 7,73 7,73 7,51 10,4 10,1 13,2 13,0 13,0Fans power kW 0,25 0,25 0,25 0,25 0,25 0,25 0,25 0,25 0,25NOISE LEVELNoise Pressure (4) dB(A) 53 53 53 54 54 54 55 55 55Noise Power (5) dB(A) 85 85 85 86 86 86 87 87 87SIZE AND WEIGHTA (6) mm 2195 2195 2195 2195 2745 2745 3245 3245 3245B (6) mm 1120 1120 1120 1120 1120 1120 1120 1120 1120H (6) mm 1420 1420 1420 1420 1420 1420 1620 1620 1620Operating weight (6) kg 645 670 710 800 985 1030 1175 1220 1265
Notes:1 Plant (side) cooling exchanger water (in/out) 12°C/7°C; Source (side) heat exchanger air (in) 35°C2 Values in compliance with EN14511-3:20113 Plant (side) heat exchanger water (in/out) 40°C/45°C; Source (side) heat exchanger air (in) 7°C - 87% R.H.4 Average sound pressure level, at 10m distance, unit in a free field on a reflective surface; non-binding value obtained from the sound power level.5 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.6 Unit in standard configuration/execution, without optional accessories.- Unavailable
PERFORMANCECOOLING ONLY (GROSS VALUE)Cooling capacity (1) kW 48,0 54,6 73,2 83,5 93,9 103 119 132 143Total power input (1) kW 19,0 21,3 27,2 31,9 36,0 41,6 44,6 53,3 62,7EER (1) 2,53 2,56 2,69 2,62 2,61 2,48 2,67 2,47 2,28ESEER (1) 3,52 3,31 3,46 3,33 3,33 3,17 3,38 3,16 2,93COOLING ONLY (EN14511 VALUE)Cooling capacity (1)(2) kW 47,9 54,5 73,0 83,3 93,7 103 119 131 143EER (1)(2) 2,51 2,55 2,67 2,59 2,59 2,46 2,64 2,45 2,26ESEER (1)(2) 3,26 3,26 3,39 3,27 3,27 3,11 3,32 3,11 2,88Cooling energy class D D D D D E D E FHEATING ONLY (GROSS VALUE)Heating capacity (3) kW 54,1 63,6 84,1 96,2 109 121 138 154 169Total power input (3) kW 18,1 20,6 26,1 30,4 34,1 37,9 42,4 48,3 54,3COP (3) 2,99 3,09 3,22 3,16 3,19 3,18 3,24 3,19 3,12HEATING ONLY (EN14511 VALUE)Heating capacity (3)(2) kW 54,2 63,7 84,3 96,5 109 121 138 154 170COP (3)(2) 2,98 3,07 3,20 3,14 3,18 3,16 3,22 3,16 3,10Cooling energy class C B A B B B A B BEXCHANGERSHEAT EXCHANGER USER SIDE IN REFRIGERATIONWater flow (1) m³/h 8,26 9,41 12,6 14,4 16,2 17,8 20,5 22,7 24,6Pressure drop (1) kPa 5,11 6,58 11,9 15,5 11,9 14,4 13,8 17,9 21,2HEAT EXCHANGER USER SIDE IN HEATINGWater flow (3) m³/h 9,39 11,1 14,6 16,7 18,9 21,0 23,9 26,7 29,4Pressure drop (3) kPa 6,60 9,09 16,1 20,9 16,4 20,0 18,8 25,0 30,2COMPRESSORSN. of compressors N° 2 2 2 2 2 2 2 2 2Number of capacity N° 2 2 2 2 2 2 2 2 2No. of circuits N° 2 2 2 2 2 2 2 2 2Regulation STEPS STEPS STEPS STEPS STEPS STEPS STEPS STEPS STEPSMin. capacity step % 50 50 50 50 50 50 50 50 50Refrigerant R410A R410A R410A R410A R410A R410A R410A R410A R410ARefrigerant charge kg 19,0 22,0 25,0 35,0 38,0 34,0 49,0 41,0 46,0Oil charge kg 6,00 6,50 6,50 7,95 9,40 10,8 13,6 13,1 12,6FANSQuantity N° 6 6 8 8 8 8 10 10 10Air flow m³/s 6,12 5,81 7,85 8,85 8,68 8,68 10,9 10,9 10,9Fans power kW 0,16 0,16 0,16 0,25 0,25 0,25 0,25 0,25 0,25NOISE LEVELNoise Pressure (4) dB(A) 48 48 49 51 51 51 52 52 52Noise Power (5) dB(A) 80 80 81 83 83 83 84 84 84SIZE AND WEIGHTA (6) mm 2195 2195 2745 2745 2745 2745 3245 3245 3245B (6) mm 1120 1120 1120 1120 1120 1120 1120 1120 1120H (6) mm 1420 1420 1420 1620 1620 1620 1620 1620 1620Operating weight (6) kg 645 670 795 935 1060 1065 1230 1220 1265
Notes:1 Plant (side) cooling exchanger water (in/out) 12°C/7°C; Source (side) heat exchanger air (in) 35°C2 Values in compliance with EN14511-3:20113 Plant (side) heat exchanger water (in/out) 40°C/45°C; Source (side) heat exchanger air (in) 7°C - 87% R.H.4 Average sound pressure level, at 10m distance, unit in a free field on a reflective surface; non-binding value obtained from the sound power level.5 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.6 Unit in standard configuration/execution, without optional accessories.- Unavailable
Ta [°C] - Air temperature Tev [°C] - Plant (side) cooling exchanger output water temperature
Pat [kW] - Total power input Qev [m³/h] - Plant (side) heat exchanger water flow Dpev [kPa] - Plant (side) cooling exchanger pressure drop
Pf [kW] - Cooling capacity
'-' Conditions outside the operating range Waterflow and pressure drop on heat exchangers calculated with 5°C of delta TNOTE: Data on grey background: unit switched to non-silenced operation
Ta [°C] - Air temperature Tev [°C] - Plant (side) cooling exchanger output water temperature
Pat [kW] - Total power input Qev [m³/h] - Plant (side) heat exchanger water flow Dpev [kPa] - Plant (side) cooling exchanger pressure drop
Pf [kW] - Cooling capacity
'-' Conditions outside the operating range Waterflow and pressure drop on heat exchangers calculated with 5°C of delta TNOTE: Data on grey background: unit switched to non-silenced operation
Ta [°C] - Air temperature Tev [°C] - Plant (side) cooling exchanger output water temperature
Pat [kW] - Total power input Qev [m³/h] - Plant (side) heat exchanger water flow Dpev [kPa] - Plant (side) cooling exchanger pressure drop
Pf [kW] - Cooling capacity
'-' Conditions outside the operating range Waterflow and pressure drop on heat exchangers calculated with 5°C of delta TNOTE: Data on grey background: unit switched to non-silenced operation
Ta [°C] - Air temperature Tev [°C] - Plant (side) cooling exchanger output water temperature
Pat [kW] - Total power input Qev [m³/h] - Plant (side) heat exchanger water flow Dpev [kPa] - Plant (side) cooling exchanger pressure drop
Pf [kW] - Cooling capacity
'-' Conditions outside the operating range Waterflow and pressure drop on heat exchangers calculated with 5°C of delta TNOTE: Data on grey background: unit switched to non-silenced operation
Ta [°C] - Air temperature Tcd (°C) - Plant (side) heating exchanger output water temperaturePt (kW) - Heating capacity
Pat (kW) - Total power input
Qcd (m³/h) - Plant (side) heating exchanger water flow Dpcd (kPa) - Plant (side) heating exchanger pressure drop
'-' - Conditions outside the operating range Waterflow and pressure drop on heat exchangers calculated with 5°C of delta TNOTE: Data on grey background: unit switched to non-silenced operation
Ta [°C] - Air temperature Tcd (°C) - Plant (side) heating exchanger output water temperaturePt (kW) - Heating capacity
Pat (kW) - Total power input
Qcd (m³/h) - Plant (side) heating exchanger water flow Dpcd (kPa) - Plant (side) heating exchanger pressure drop
'-' - Conditions outside the operating range Waterflow and pressure drop on heat exchangers calculated with 5°C of delta TNOTE: Data on grey background: unit switched to non-silenced operation
Ta [°C] - Air temperature Tcd (°C) - Plant (side) heating exchanger output water temperaturePt (kW) - Heating capacity
Pat (kW) - Total power input
Qcd (m³/h) - Plant (side) heating exchanger water flow Dpcd (kPa) - Plant (side) heating exchanger pressure drop
'-' - Conditions outside the operating range Waterflow and pressure drop on heat exchangers calculated with 5°C of delta TNOTE: Data on grey background: unit switched to non-silenced operation
Ta [°C] - Air temperature Tcd (°C) - Plant (side) heating exchanger output water temperaturePt (kW) - Heating capacity
Pat (kW) - Total power input
Qcd (m³/h) - Plant (side) heating exchanger water flow Dpcd (kPa) - Plant (side) heating exchanger pressure drop
'-' - Conditions outside the operating range Waterflow and pressure drop on heat exchangers calculated with 5°C of delta TNOTE: Data on grey background: unit switched to non-silenced operation
Ta [°C] - Air temperature Tcd (°C) - Plant (side) heating exchanger output water temperaturePt (kW) - Heating capacity
Pat (kW) - Total power input
Qcd (m³/h) - Plant (side) heating exchanger water flow Dpcd (kPa) - Plant (side) heating exchanger pressure drop
'-' - Conditions outside the operating range Waterflow and pressure drop on heat exchangers calculated with 5°C of delta TNOTE: Data on grey background: unit switched to non-silenced operation
Ta [°C] - Air temperature Tcd (°C) - Plant (side) heating exchanger output water temperaturePt (kW) - Heating capacity
Pat (kW) - Total power input
Qcd (m³/h) - Plant (side) heating exchanger water flow Dpcd (kPa) - Plant (side) heating exchanger pressure drop
'-' - Conditions outside the operating range Waterflow and pressure drop on heat exchangers calculated with 5°C of delta TNOTE: Data on grey background: unit switched to non-silenced operation
A - Operating limits in non-silent-running mode. In these conditions, ventilation is automatically increased to assu-re correct unit operation.
B - Limits with LT kit for low air temperatures
pspeggio
Rettangolo
NECS-N
5.2 ETHYLENE GLYCOL MIXTURE Ethylene glycol and water mixture, used as a heat-conveying fluid, cause a variation in unit performance. For correct data, use the factors indicated in the following tabel.
cdp: pressure drop correction factor cQ: flow correction factor cPf: cooling power correction factor For data concerning other kind of anti-freeze solutions (e,g, propylene glycol)
please contact our Sale Department.
Freezing point (°C)
Ethylene glycol percentage by weight
5.3 FOULING FACTORS Performances are based on clean condition of tubes (fouling factor = 1). For different fouling values, performance should be adjusted using the correction factors shown in the following table.
6.1 Water flow and pressure drop Water flow in the heat exchangers is given by: Q=Px0,86/Dt Q: water flow (m3/h) Dt: difference between inlet and outlet water temp. (°C) P: heat exchanger capacity (kW)
Q min: minimum water flow admitted to the heat exchanger Q max: maximum water flow admitted to the heat exchanger C.a. min: minimum water content admitted in the plant, using traditional control logic
The units can be supplied with a hydronic group. This houses all the main hydraulic components, thereby optimising hydrau-lic and electric installation space, time and cost. The innovative QuickMind control fitted 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 systems featuring storage units.
Available configurations:
CENTRIFUGAL PUMPHydronic kit with one 2-pole low-head pump Hydronic kit with one 2-pole high-head pump Hydronic kit with two 2-pole low-head pumps Hydronic kit with two 2-pole high-head pumps
2-pole low head pumpCentrifugal electric pumps with hydraulic parts in AISI 304/316, insulated pump impeller and differential pressure switch on the evaporator. Pump shut-off valves fitted on both delivery and suction of a check valve for each pump installed. Hydronic kit equipped with safety valve, water pressure gauge and air vents.
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 mo-tor even in the low noise versions.
Second pumpA second stand-by pump for high or low pressures is available 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 connectionsIn units without a pump, in the standard version, the water inlet and outlet connections in both the evaporator and the desuper-heater are always flush with the machine.
Water-side mechanical filter (optional)Y-filter designed and built to capture the impurities in the hy-draulic circuit. It is fitted with a 0.9 mm stainless steel mesh cartridge which can be replaced without removing the valve body from the piping.
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)
CONFIGURATION OF HYDRONIC UNIT WITH 1/2 ORTHOGONAL PUMPS
The hydronic unit comprises: - EV User side exchanger - PE Centrifugal pump - Pd Differential pressure switch - SC Discharge valve - S1 Exchanger input water temperature probe - S2 Exchanger outlet water temperature probe - SF Air vent - RH Check valves
CIRCUITS WITH 2 OPTIONAL PUMPS
SYSTEM RETURN LINE
SYSTEM DELIVERY LINE
22 NECS_N_0202T_0612T_201007_GB
NECS-N
HFC R410A
pspeggio
Rettangolo
2-POLE LOW HEAD- 1/2 PUMPS
(1) Values refer to rated operating conditionsPf Cooling capacity of unitQ Evaporator water flow rate F.L.I. Power absorbed by pump F.L.A. Current absorbed by pumpSA Starting current by pump KP1 Coefficients for calculating pressure drops Unit with hydronic unit without network filterDpu Total pressure drop of hydronic groupHu Working head
PUMP CHARACTERISTICS
Pf (1) Q (1) Pump F.L.I. F.L.A. SAKP1
Dpu Hu
[kW] [m3/h] Reference [kW] [A] [A] [kPa] [kPa]
0202T 53.0 9.13 D 1,1 2,5 13,7 132,3 11,0 117
0252T 58.1 10.0 D 1,1 2,5 13,7 132,3 13,2 111
0302T 76.0 13.1 D 1,1 2,5 13,7 132,3 22,6 85
0352T 86.8 14.9 D 1,1 2,5 13,7 132,3 29,5 119
0412T 96.9 16.7 D 1,1 2,5 13,7 66,4 18,4 119
0452T 112 19.3 D 1,1 2,5 13,7 66,4 24,8 94
0512T 127 21.8 C 1,5 3,2 20,6 53,4 25,3 115
0552T 145 24.9 B 1,5 3,4 22,2 55,4 34,4 100
0612T 159 27.3 A 1,5 3,5 24,3 55,4 41,2 95
20
40
60
80
100
120
140
160
180
200
220
240
0 3 6 9 12 15 18 21 24 27 30 33 36 39 42 45
Q [m3/h]
Hp
[kPa
]
ABCD
23 NECS_N_0202T_0612T_201007_GB
NECS-N
HFC R410A
pspeggio
Rettangolo
2-POLE HIGH HEAD - 1/2 PUMPS
PUMP CHARACTERISTICS
Pf (1) Q (1) Pump F.L.I. F.L.A. SAKP
Dpu Hu
[kW] [m3/h] Reference [kW] [A] [A] [kPa] [kPa]
0202T 53.0 9.13 D 1,5 3,2 20,6 132,3 11 197
0252T 58.1 10.0 D 1,5 3,2 20,6 132,3 13 191
0302T 76.0 13.1 C 2,2 4,8 37,3 132,3 23 201
0352T 86.8 14.9 C 2,2 4,8 37,3 132,3 29 190
0412T 96.9 16.7 C 2,2 4,8 37,3 66,4 18 197
0452T 112 19.3 B 3 5,6 57,6 66,4 25 205
0512T 127 21.8 B 3 5,6 57,6 53,4 25 198
0552T 145 24.9 A 3 6,3 51,6 55,4 34 234
0612T 159 27.3 A 3 6,3 51,6 55,4 41 216
(1) Values refer to rated operating conditionsPf Cooling capacity of unit Q Evaporator water flow rateF.L.I. Power absorbed by pump F.L.A. Current absorbed by pump SA Starting current by pumpKP Coefficients for calculating pressure drops Unit with hydronic unit without network filterDpu Total pressure drop of hydronic group Hu Working head
F.L.I.: Full load power F.L.A.: Full load current L.R.A.: Locked rotor amperes for single compressor S.A.: Inrush current
(1) (2) Safety values to be considered when cabling the unit for power supply and line-protections
(1) Values calculated referring to the version with the maximum number of fans working at the max absorbed current
Power supply: 400/3/50+N Voltage tolerance: 10% Maximum voltage unbalance: 3% 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 precipitations, 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 significant 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 general. (*) for the unit’s operating limits, see “selection limits” section
F.L.I.: Full load power F.L.A.: Full load current L.R.A.: Locked rotor amperes for single compressor S.A.: Inrush current
(1) (2) Safety values to be considered when cabling the unit for power supply and line-protections
(1) Values calculated referring to the version with the maximum number of fans working at the max absorbed current
Power supply: 400/3/50+N Voltage tolerance: 10% Maximum voltage unbalance: 3% 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 precipitations, 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 significant 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 general. (*) for the unit’s operating limits, see “selection limits” section
Plant (side) cooling exchanger water (in/out) 12/7 °CHeat exchanger air (in) 35 °C 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 Such certification refers specifically to the sound Power Level in dB(A). This is therefore the only acoustic data to be considered as binding.
Plant (side) cooling exchanger water (in/out) 12/7 °CHeat exchanger air (in) 35 °C 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
Plant (side) cooling exchanger water (in/out) 12/7 °CHeat exchanger air (in) 35 °C 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 Such certification refers specifically to the sound Power Level in dB(A). This is therefore the only acoustic data to be considered as binding.
Plant (side) cooling exchanger water (in/out) 12/7 °CHeat exchanger air (in) 35 °C 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
UNI ISO 228/1 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 pressure-tight joints are not made on the threads B: Wider tolerance class for external pipe threads where pressure-tight joints are not made on the threads Internal threads: G letter followed by thread mark (only tolerance class) External threads: G letter followed by thread mark and by A letter 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 letter Internal conical threads: R letter followed by c letter External conical threads: R letter
UNI ISO 7/1 - Rp 1 1/2
UNI ISO 7/1 - Rp 2 1/2
UNI ISO 7/1 - Rp 3
UNI ISO 228/1 - G 4 B
DN 80 PN 16
UNI ISO 7/1 - R 3
Designation Description Internal cylindrical threads where pressure-tight joints are made on the threads, defined by standard UNI ISO 7/1 Conventional ø 1 1/2”
Internal cylindrical threads where pressure-tight joints are made on the threads, defined by standard UNI ISO 7/1 Conventional ø 2 1/2”
Internal cylindrical threads where pressure-tight joints are made on the threads, defined by standard UNI ISO 7/1 Conventional ø 3”
External conical threads where pressure-tight joints are made on the threads, defined by standard UNI ISO 7/1 Conventional ø 3”
Internal cylindrical threads where pressure-tight joints are not made on the threads, defined by standard UNI ISO 228/1Tolerance class B for external thread Conventional ø 4”
Flange Nominal Diameter: 80 mm Nominal Pressure: 16 bar
UNI ISO 7/1 UNI ISO 228/1
1"1"
2.309 mm2.309 mm
33.249 mm33.249 mm
30.291 mm30.291 mm
1.479 mm1.479 mm
Notes: Conventional diameter value [in inches] identifies short thread designation, based upon the relative standard. All relative values are defined by standards. As example, here below some values:
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