Mitsubishi NECS-ME 0252, NECS-ME 0152, NECS-ME Series, NECS-ME 0302, NECS-ME 0262 Technical Bulletin

Climaveneta Technical Bulletin

NECS_ME_0152_1604_201004_GB

NECS-ME

0152 - 1604
39,5 - 432 kW

Condenserless chiller

Refrigerant gas R410A
Can be combined with a remote condenser
Integral control and adjustment
Integrated hydronic module

(The photo of the unit is indicative and may change depending on the model)

CERTIFICATIONS

Product certifi cations

System certifi cations

Climaveneta S.p.A.:

Quality System complying with the requirements of UNI EN ISO9001:2008 regulation

Environmental Management System complying with the requirements of UNI EN

ISO14001:2004 regulation

SUMMARY

NECS-ME

NECS-ME

0152 - 1604

1. Product presentation

1.1 NECS-ME units

1.2 R410A refrigerant

1.3 Combination with a remote condenser

1.4 Integral control and adjustment

1.5 Hydronic unit incorporated

1.6 Silent running

1.7 Ease of installation

1.8 Versatility

1.9 Usability

2. Unit description

2.1 Standard unit composition

2.2 Certifi cation, Reference standard

2.3 Tests

2.4 Controller

2.5 Accessories

2.6 Control unit with LCD display (standard)

3. Technical data

3.1 General technical data

3.2 Cooling capacity performance

4. Operating range

5. Hydraulic data

5.1 Water fl ow and pressure dro

5.2 Hydronic groups

6. Electrical data

7. Full load sound level

8. Dimensional drawings

9. Legend of pipe connections

10. Remote condensers

11. Combinations of evaporating units and remote condensers

pg. n° III
pg. n° III
pg. n° III
pg. n° III
pg. n° III
pg. n° III
pg. n° III
pg. n° III
pg. n° III
pg. n° III
pg. n° 1
pg. n° 1
pg. n° 1
pg. n° 1
pg. n° 2
pg. n° 2
pg. n° 3
pg. n° 5
pg. n° 5
pg. n° 8
pg. n° 13
pg. n° 14
pg. n° 14
pg. n° 15
pg. n° 19
pg. n° 20
pg. n° A1
pg. n° A6
pg. n° B1
pg. n° B2

The units highlighted in this publication contain HFC R410A [GWP

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
dimension, weight, electric, hydraulic, aeraulic and refriger­ant connections (whereas applicable). Contact Climaveneta
Commercial Offi ce for further drawings and schemes.

2088] fluorinated greenhouse gases.

100

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 data contained herein are subject to variation without no­tice.

II

NECS_ME_0152_1604_201004_GB

HFC R410A

1. PRODUCT PRESENTATION

NECS-ME

Introduction

This section contains general information on the NECS-ME
range of products. For detailed information refer to the specifi c
sections in this bulletin.

1.1 NECS-ME units

The NECS-ME chillers are a range of remote-condensation liq­uid units running on R410A ecological gas.
They are indoor units with hermetic scroll compressors in a
single-circuit (2-compressor units) and twin-circuit (4-compres­sor unit) tandem confi guration, and braze-welded plate heat
exchangers.

1.2 R410A refrigerant

The use of R410A has improved the energy effi ciency of the
units, in full respect of the environment (O.D.P.=0)

1.3 Combination with a remote condenser

Compact units designed for residential and commercial sys­tems.

1.4 Integral control and adjustment

The evaporating unit is supplied complete with integral micro­processor control and optional connection to a remote con-

denser.

1.5 Hydronic unit incorporated

The integrated hydronic unit comprises the main hydraulic
components; it is available in various confi gurations with single
or dual orthogonal pumps and high or low heads.

1.7 Ease of installation

All the connections of the NECS-ME units are located on the
side in order to simplify installation operations. This feature
also makes it possible to save space as the units can be posi­tioned near the perimeter walls without compromising access
to the internal components during maintenance.

1.8 Versatility

On request, the NECS-ME units can be fi tted with an inte-
grated pump unit for circulating the liquid in the system, with
a high or low head depending on the various application re­quirements. As well as the primary pump, it is also possible to
add an auxiliary circulation pump which starts automatically if
the former develops a fault. This makes it possible to respect
the harshest safety aspects of the system, whilst allowing the
pumps to be rotated to balance operating hours (thus prevent­ing risks of mechanical breakage) and to manually select one
of the two pumps.

1.9 Usability

The electronic controller of the NECS-ME features a program­mable menu containing the most popular European languages
which the user can choose depending on the country in which
the unit is used (available standard in the 4-compressor unit, in
the reduced mode in the 2-compressor version).

1.6 Silent running

The NECS-ME chillers stand out for their silent running. If
specifi cally requested, the casing of the unit can incorporate
a layer of soundproofi ng made from high intermediate density
conoid sandwich material which reduces noise suffi ciently to
allow NECS-ME to be used in residential and commercial ar­eas without having to install it in dedicated rooms (technical
rooms). The benefi t in terms of noise reduction is 4dB(A) in the
models with 2 compressors and 10dB(A) in the models with 4
compressors.

III

NECS_ME_0152_1604_201004_GB

HFC R410A

2. UNIT DESCRIPTION

NECS-ME

Liquid chiller with remote condensation

Water-cooled indoor unit for producing chilled water, with con­nection to a remote condenser fi tted with hermetic rotary scroll
compressors running on R410A, braised-welded plate exchang­ers and a thermostatic expansion valve. Base and panelling in
hot-galvanised and painted sheet steel.

2.1 Standard unit composition
Structure

Base and frame in hot-galvanised shaped sheet steel with a
suitable thickness.
External panelling in PET-treated colaminate sheet, suitably
thick, built to allow total access to the internal components,
ventilation of the compressor chamber (standard for NECS-ME

0152..0612, option for all the other units). Acoustic insulation
of the panel with 30 mm thick Fiberform available as an acces­sory. Panels fi xed with metric screws (not self-tapping).

Refrigerant circuit

Main components of the refrigerant circuit:

- single-circuit unit with two compressors in a tandem confi gu-
ration (NECS-ME 0152..0612)

- twin-circuit unit with two compressors in a tandem confi gura-
tion on both circuits (NECS-ME 0612..1604)

- R410A refrigerant

- mechanical thermostatic valves

- dryer fi lter,

- refrigerant line sight glass with humidity indicator

- high pressure safety valve

- low pressure safety valve

- high and low pressure transducers

- high and low pressure gauges on all circuits (NECS-ME

0604..1604).

Compressor

Rotary hermetic scroll compressor in a tandem layout complete
with oil sump heater, electronic overheating protection with cen­tralised manual reset and a two-pole electric motor.

- remote ON/OFF terminals

- spring terminals

- pump enable relays (only for units without a standard hydronic
unit)

- manual and automatic pump rotation system in case pumps
stop (only for units with a two-pump hydronic unit)

- automatic pump operation rotation system for balancing oper­ating hours (only for units with a two-pump hydronic unit)

- terminals for cumulative alarm block (BCA)

- input voltage: 400V~ ±10% - 50Hz - 3N.

2.2 Certifi cation, Reference standards

The machine complies with the following directives and their
amendments:

- 2006/42/EC 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. TÜV­Italia 0948

2.3 Tests

Tests performed throughout the production process, as indicat­ed in ISO9001. Performance or noise tests can be performed
by highly qualifi ed staff in the presence of customers.
Performance tests include the measurement of:

- electrical specifi cations

- water fl ow rates

- operating temperatures

- power input

- power output

- pressure drops on the water side exchanger both at full load

(at selection conditions and at the most critical conditions for
the condenser) and at part load conditions.
During performance testing the main alarm states can also be
simulated.
Noise tests are performed to check noise emissions according
to ISO3744.

User side exchanger

AISI 316 steel braze-welded plate exchanger. The heat ex­changer is insulated with a closed-cell condensation proof
lining in neoprene. When the unit is working, it is protected
against lack of fl ow by a differential pressure switch mounted
on the water side. The unit can work with antifreeze mixtures at
exchanger outlet temperatures as low as -8°C.

Electric power and control 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 (NECS-ME

0604..1604)

- circuit breakers on loads (NECS-ME 0152..0612)

- numbered electric cables (NECS-ME 0152..0612)

- auxiliary signal 4..2OmA for unit operating setpoint offset
(NECS-ME 0604..1604)

- Keyboard with multi-language interface and LCD display
(NECS-ME 0604..1604)

1

NECS_ME_0152_1604_201004_GB

HFC R410A

NECS-ME

2.4 Controller

The controller is available in two formats:

- W3000 Base: keyboard and LED display.

- W3000SE Compact: the keypad features functional controls

and a complete LCD display that allows assessment and inter­vention on the unit by means of a multi-level menu with selecta­ble user’s language.
The diagnostics comprises a complete alarm management sys­tem, including “black box” (via PC) functions and an alarm log
(via display or also PC) for optimised analysis of unit perform­ance.
Compatibility with the remote keyboard managing up to 10
units.
The presence of the programmable timer allows the creation
of an operating profi le containing up to 4 typical days and 10
time bands.
Common features: Heat adjustment is based on the exclusive
QuickMind algorithm, featuring a self-adaptive logic which is
useful for systems with a low water content. Alternatively, pro­portional or proportional-integral adjustments can be set.
For systems featuring more than one unit, the resources can
be adjusted using optional propriety devices. Consumption and
performance accounting can also be implemented. 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
protocols.

2.5 Accessories

- 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, favourable
sizing for the electrical system.

- HP and LP gauges
High and low pressure gauges (only for sizes 0152..0612).

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.

- Extra insulation for the compressors section
Acoustic encolsure on both compressor and pump sections
(when applicable).

Noise emission reduction.

- 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 rea­sons or in temporary situation.

- Liquid line solenoid valve
Solenoid valve on the refrigerant circuit inlet (only for sizes

0604..1604).

It avoids liquid to migrate toward the compressors when they
are off.

- 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 remote
control of any auxiliary loads.

- ModBUS connectivity
Interface module for ModBUS protocols.

Allows integration with BMS operating with ModBUS proto­col.

- 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 procotls.

- Auxiliary signal 4-20mA

4..20mA analogue input. Allows to change the operating set­point according to the value of current applied to the analogue
input.

Enforce Energy Saving policies

- Multi-units control devices
(Sequencer, Manager3000, FWS3000)
Separately supplied.

2

NECS_ME_0152_1604_201004_GB

HFC R410A

NECS-ME

2.6 Control unit with LCD display (standard)

The new “W3000 Base” control unit is installed on all NECS-ME

0152..0612 units.
The new “W3000SE Compact” control unit is installed on all
NECS-ME 0604..1604 units.

Main functions: QuickMind, local and remote FWS supervi­sion, dual set point management, etc, confi rm Climaveneta’s
commitment to continually developing its electronics technol­ogy.
The heat pumps, moreover, are fi tted 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 sys­tems: METASYS®, MODBUS®, LONWORKS®, SIEMENS®,
TREND®.

Black Box logs data relative to 200 alarm events which can be
printed with a personal computer.

Variation output temperature

12

11

10

9

8

7

6

5

Temperatura in uscita (°C)

4

Output temperature (°C)

3

2

0.5 1.5 2.5 3.5 4.5 5.5 6.5 7.5 8.5 9.5

11.34

Step-wise regulation

Regolazione a gradini

7.54

Quickmind

5.9

4.3

Variazione temperatura in uscita

4.56

3,68

3.9

3.5

Minimum water content in the plant lt/kW

QuickMind is a special control unit which monitors the main
operating parameters, predicts system behaviour and antici­pates unit settings in order to constantly optimise performance;
it allows both return and delivery water temperatures to be
chosen as adjustment parameters. It can reduce outlet tem­perature fl 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. QuickMind ensures the same chiller operates cor­rectly even with a water content of just 2.5 l/kW and considera­bly reduces outlet temperature fl uctuations. The above graph
shows that outlet temperature fl 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 compressor start time.

Not acceptable minimum starting time compressors

Tempo minimo di accensione compressore non accettabile

3.52

3.3

3.52

3.2

3.52 3.52

3.1

3.52

3

3.52

10.5

3

11

3

3

NECS_ME_0152_1604_201004_GB

HFC R410A

NECS-ME

Control unit with LCD display
(optional for NECS-ME 0152..0612)

Remote keyboard

As an alternative to the standard keyboard, the NECS has
a W3000 Compact operator panel with liquid crystal display.
(LCD)
This keyboard is standard for the NECS-ME 0604..1604 units.

This keyboard features a user interface for 3 European lan­guages that can be selected by the user. Two of these are
preset (Italian and English) and the third can be chosen from

French, German, Spanish, Swedish and Russian (to specify
when ordering). 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 con­nection up to a maximum distance of 200 metres without power
supply (in this case power is supplied by the unit), or a maxi­mum of 500 metres with dedicated local power supply.

Note

The remote keyboard may be connected to the unit without re­placing the W3000 Base operator panel originally provided on
the unit. In this case the interface fi tted 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 confi guring
and controlling the unit.

4

NECS_ME_0152_1604_201004_GB

HFC R410A

3.1 GENERAL TECHNICAL DATA

NECS-ME

B

SIZE 0152 0182 0202 0252 0262 0302 0352

NECS-ME /B
COOLING

(1)

Cooling capacity kW 39,5 45,8 53,6 60,5 67,4 80,2 92,8

Total power input (unit) kW 12,0 13,5 15,7 18,1 20,0 23,4 26,9
EER
ESEER

3,29

-

3,39

-

3,41

-

3,34 - 3,37

-

3,43

-

3,45

Heat exchanger water flow m³/h 6,80 7,89 9,23 10,4 11,6 13,8 16,0
Heat exchanger pressure drop kPa 48,0 41,3 41,0 39,1 48,4 29,4 27,6

COMPRESSORS
Number
Number of capacity
Number of circuits N°.
Type of regulation

N°. 2 2 2 2 2 2 2

N°.

2 2 2 2 2 2 2
1 1 1 1 1 1 1

STEPS STEPS STEPS STEPS STEPSSTEPSSTEPS

% 50 50 50 50 50 50 50Minimum capacity steps

R410AR410AR410A R410A R410AR410AR410AType of refrigerant

mm.
mm.
mm.
kg.

(2)

74

75

76

4443

(3)

1130

669

1255

270

1130

669

1255

280

1130

669

1255

290

1130

669

1255

295

1130

669

1255

300

1310

893

1496

410

77

4544 434342dB(A)Total sound pressure

1310

893

1496

500

NOISE LEVELS
Total sound power dB(A) 73 74 74

DIMENSIONS AND WEIGHTS
Length
Width
Height
Weight

-

--- - ---kg.Refrigerant charge

333 3 333kg.Oil charge

1 Plant (side) cooling exchanger water (in/out) 12/7 °C
Condensation temperature 47 °C
2 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
3 Standard configuration

- Not available

ELCADOC - Ver. 1.0.0.1

5

NECS-ME_0152_1604_201004_*% Ref.: R410A

GENERAL TECHNICAL DATA

NECS-ME

B

SIZE 0412 0452 0512 0552 0612 0604 0704

NECS-ME /B
COOLING

(1)

Cooling capacity kW 105 117 131 151 170 161 186

Total power input (unit) kW 30,3 33,9 37,6 43,3 48,9 46,9 53,7
EER
ESEER

3,45

-

3,46

-

3,49

-

3,48 - 3,47

-

3,43

-

3,46

Heat exchanger water flow m³/h 18,0 20,2 22,6 25,9 29,3 27,7 31,9
Heat exchanger pressure drop kPa 35,0 33,1 32,2 28,9 36,8 32,5 31,0

COMPRESSORS
Number
Number of capacity
Number of circuits N°.
Type of regulation

N°. 2 2 2 2 2 4 4

N°.

2 2 2 2 2 4 4
1 1 1 1 1 2 2

STEPS STEPS STEPS STEPS STEPSSTEPSSTEPS

% 50 50 50 50 50 25 25Minimum capacity steps

R410AR410AR410A R410A R410AR410AR410AType of refrigerant

3,253,256 7 755kg.Oil charge

mm.
mm.
mm.
kg.

(2)

79

79

86

5447

(3)

1310

893

1496

585

1310

893

1496

615

1310

893

1496

645

1310

893

1496

680

1310

893

1496

755

2227
1020
1780

700

87

5547 464645dB(A)Total sound pressure

2227
1020
1780

950

NOISE LEVELS
Total sound power dB(A) 77 78 78

DIMENSIONS AND WEIGHTS
Length
Width
Height
Weight

-

--- - ---kg.Refrigerant charge

1 Plant (side) cooling exchanger water (in/out) 12/7 °C
Condensation temperature 47 °C
2 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
3 Standard configuration

- Not available

ELCADOC - Ver. 1.0.0.1

6

NECS-ME_0152_1604_201004_*% Ref.: R410A

GENERAL TECHNICAL DATA

NECS-ME

B

SIZE 0804 0904 1004 1104 1204 1404 1604

NECS-ME /B
COOLING

(1)

Cooling capacity kW 207 235 263 301 339 387 432

Total power input (unit) kW 60,6 67,9 75,2 86,5 97,8 111 124
EER
ESEER

3,42

-

3,47

-

3,50

-

3,47 - 3,47

-

3,49

-

3,48

Heat exchanger water flow m³/h 35,7 40,5 45,3 51,7 58,4 66,5 74,3
Heat exchanger pressure drop kPa 38,8 38,9 39,4 36,7 46,7 49,6 54,7

COMPRESSORS
Number
Number of capacity
Number of circuits N°.
Type of regulation

N°. 4 4 4 4 4 4 4

N°.

4 4 4 4 4 4 4
2 2 2 2 2 2 2

STEPS STEPS STEPS STEPS STEPSSTEPSSTEPS

% 25 25 25 25 25 25 25Minimum capacity steps

R410AR410AR410A R410A R410AR410AR410AType of refrigerant

6,36,36,3 6,8 6,84,74,7kg.Oil charge

mm.
mm.
mm.
kg.

(2)

91

91

91

5959

(3)

2227
1020
1780
1125

2227
1020
1780
1185

2227
1020
1780
1250

2227
1020
1780
1330

2227
1020
1780
1370

2227
1020
1780
1430

91

5959 585756dB(A)Total sound pressure

2227
1020
1780
1480

NOISE LEVELS
Total sound power dB(A) 88 89 90

DIMENSIONS AND WEIGHTS
Length
Width
Height
Weight

-

--- - ---kg.Refrigerant charge

1 Plant (side) cooling exchanger water (in/out) 12/7 °C
Condensation temperature 47 °C
2 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
3 Standard configuration

- Not available

ELCADOC - Ver. 1.0.0.1

7

NECS-ME_0152_1604_201004_*% Ref.: R410A