Model number description
Key customer benefi ts
Features and benefi ts
Technical description
Options and accessories
GENERAL DATA
2.
General data
Pressure drops
Hydraulic data
- eDrive
- Partial heat recovery
- Total heat recovery
- Free-cooling
Acoustic data
Operating limits
Ref :NEOSYS-AGU-1801-E
2
3
4
6
8
10
17
19
23
27
28
30
32
33
ELECTRICAL DATA
4.
Electrical tables
PERFORMANCES
5.
NAC37
NAH50
DIMENSIONAL DATA
6.
Dimensional data
Weight data
Product designed and manufactured
under quality management systems
certifi ed ISO 9001 and ISO 14001.
www.eurovent-certifi cation.com
www.certifl ash.com
Our company’s products comply
with European standards.
34
52
62
All the technical and technological information contained in this manual, including any drawing and technical descriptions
provided by us, remain the property of Lennox and must not be utilised (except in operation of this product), reproduced, issued to
or made available to third parties without the prior written agreement of Lennox.
Application Guide /NEOSYS-AGU-1801-E
• 1 •
MODEL NUMBER DESCRIPTION
EXAMPLE :
N
A
C
200
D
N
M
5
M
NAC 200D N M5 M
NEOSYS
Air cooled
C = Cooling mode
H = Heat pump mode
Cooling capacity in kW
Number of circuits :
S = 1 circuit
D = 2 circuits
T = 3 circuits
F = 4 circuits
Non ducted
R410 A refrigerant
Revision number
400V/3/50 Hz
• 2 •
Application Guide / NEOSYS-AGU-1801-E
KEY CUSTOMER BENEFITS
Air-cooled Liquid Chiller for outdoor installation (NAC)
Air-to-water Heat Pump for outdoor installation (NAH)
- High effi ciency aluminium micro channel heat exchanger
(MCHX) with improved corrosion resistance for moderate
marine or urban applications (Cooling only version). 3-year
warranty*.
- Specifi c MCHX coil design with high mechanical fi n resistance
that offers easy cleaning with high pressure air or water washers
for extended life cycle.
- V-coil design, compressor and hydraulic enclosure to protect
the unit against climatic conditions (e.g. sun rays, UV light, hail).
- Exclusive Compliant Scroll® compressor design with both
axial and radial compliance to increase compressor operation
tolerance of liquid refrigerant or debris, substantially improving
durability and reliability.
- Exclusive fan design with SKF hybrid Ceramic bearings
to double (treble in some cases) the service life of the motors
and to reduce noise level. With these sealed hybrid ceramic
bearings, our customer can expect little or no maintenance of
the motor throughout its life.
Quiet performance
3-year warranty*.
3-year warranty*.
Y
*
Y
E
T
N
3
A
R
A
R
Energy performance
-
High Energy Performance (ESEER above 4; EER up to 2.9 ;
COP up to 3,2) for improved energy consumption all around the
year.
- Aluminium micro channel heat exchanger that offers +10%
outstanding system effi ciency (cooling only version).
- R410A refrigerant for optimized system performance.
- Energy savings due to lower system minimum water content
reducing the time to reach setpoint. This can also eliminate the
need for a buffer tank.
Architectural integration
- State of the art design with hidden compressors, fans and
pump for perfect architectural integration.
- Flat top, aesthetic grilles, very low unit height (< 2 m) for
discrete installation on a roof reducing the requirement of costly
cladding solutions around the unit.
A
W
R
- Unique design with compressor, pump(s) and fan acoustic
enclosure to reduce radiated noise emissions.
- Inverter fans using external rotor technology associated with
high performance aluminium fan blades of the latest generation
(Owlet™ design).
- Elimination of intrusive fan start/stop noise that is irritating
to the human ear.
- Active Acoustic Attenuation System™ to meet changing
building load requirements while automatically adjusting the
air fl ow to meet night and day sound level constraints (Time
schedule with 4 time zones per day).
Quick performance and service
- Complete hydraulic module with single or twin, low or high
pressure pump (options) that includes all necessary equipment
for quick connection: pump(s), regulating valve, expansion tank
vessel with pressure gauge, pressure tapping points, water
fi lter, air vent, pressure relief valve and Victaulic connections.
- 400V, 50 Hz, 3 phase power supply (without neutral) with a
single point of power connection. Main on/off switch included
in as standard.
- Air spring powered Butterfl y electrical panel with jacks top
opening providing protection to service engineers against rain
or snow during commissioning and maintenance operations.
* This warranty covers parts only. The above warranty is liable if
the start-up and periodic maintenance agreement is contracted
by a LENNOX company or any company accredited by LENNOX.
Refer to LENNOX 3 year warranty conditions.
Application Guide /NEOSYS-AGU-1801-E
• 3 •
FEATURES AND BENEFITS
Flat top and low profi le for best architectural
integration
The NEOSYS design is minded to be perfectly integrated into
urban or residential environments. The state of the art design of
NEOSYS includes a painted casing, a fl at top that hides the fans
and aesthetic protection grilles.
The very low unit height less than two meters makes easier for
architects and design engineers to integrate the unit on a roof.
Many interviewed customers confi rm that the state of the art
design of NEOSYS will replace any requirement of costly cladding
solutions around the unit.
ACTIVE ACOUSTIC ATTENUATION SYSTEM™
SELECT YOU MODE PER TIME ZONE
Performance Mode
Sound (dBA)
Compressor unloading
Max (dBA)
HP
Auto Quiet Mode
Sound (dBA)
Smarts acoustics with inverter fans
No more need to make a choice between a high effi ciency version,
a low noise or an ultra low noise version. NEOSYS can adapt all
situations with only one version. NEOSYS is fi tted in standard
with the Active Acoustic Attenuation System™ that is using an
electronic control associated with inverter fans. NEOSYS can
change automatically the speed of all the fans – from 0% to 100%
of the nominal air fl ow – to meet the building load requirements
while respecting maximum authorised noise level in the time zone.
NEOSYS is surely achieving the best acoustic signature of the
market thanks to the latest generation of Owlet™ high performance
aluminium fan blades and noiseless ceramic bearings.
Max (dBA)
Customer (dBA)
Sound (dBA)
Max (dBA)
Customer (dBA)
Compressor
unloading
Fan speed override
HP
Quiet Mode
Compressor
unloading
• 4 •
HP
Application Guide / NEOSYS-AGU-1801-E
FEATURES AND BENEFITS
A high energy performance
4,60
4,40
4,20
4,00
ESEER
3,80
3,60
3,40
270300340370420480540600
Screw R134A units
By using R410A refrigerant associated with high effi ciency micro
channel coils and variable speed fans NEOSYS is contributing to
a very low energy consumption all year around with an average
energy effi ciency ratio (ESEER)* in cooling mode above 4.0.
NEOSYS Heat-pumps are also achieving very high performances
in cooling and heating mode (COP* up to 3.2).
Furthermore NEOSYS advanced control allows energy savings
all year around by using smart control functions:
- Low water system quantity to reduce the time to reach the setpoint.
- Dynamic defrost (patented) to limit the number of defrost cycles.
- Set-point reset based on outside air temperature to relax the
chilled water set-point.
NEOSYS
kW
Scroll R410A units
Floating high pressure
LENNOX optimizes the performance of the NEOSYS chillers with
electronic expansion valve (as an option) and variable speed
ventilation (as standard) to achieve maximum energy savings.
We defi ne a condensation temperature depending on the outside
air temperature at an optimum value to obtain the lowest power
inputs of couples, compressors and condenser fan motors.
*ESEER : European Seasonal Energy Effi ciency Ratio in cooling mode.
COP : Coeffi cient of Performance in heating mode.
R410A Micro channel heat exchanger
With the use of fully
aluminium coils already
used in the automotive
industry, NEOSYS offers
many customer benefi ts:
- Up to 40% less refrigerant
charge that contributes to
reduce the total amount
of refrigerant used in the
system.
- A more effi cient system
(EER + 10%).
- An air heat exchanger
with signifi cantly impro-
ved corrosion resistance
results (x 2) from the
same aluminium alloy (no galvanic action) vs. the traditional
copper tube/aluminium fi n coils. By using this type of coil, units
can be used in light corrosive or seacoast environments without
any need for additional, and expensive, pre-treated fi ns or coil
coating.
- High mechanical resistance eases the cleaning with high pressure
air or water washers without any risk of damaging the fi ns.
Available in cooling only version, this technology will surely be
enlarged shortly to reversible applications.
Application Guide /NEOSYS-AGU-1801-E
• 5 •
TECHNICAL DESCRIPTION
GENERAL CHARACTERISTICS OF THE UNIT
The NEOSYS unit is designed to be integrated into urban or
residential environments.
As main characteristics the NEOSYS unit offers state of the
art design to match architectural constraints and adjustable
sound level performances during day and night to satisfy local
environmental constraints.
CASING/CHASSIS
- Casing made of galvanised steel sheet metal painted with a white
powdered polyester paint and a red stripe.
- Fully grey colour painted chassis protecting against corrosion.
- State of the art design with hidden compressors, fans and pump
for perfect architectural integration.
- Flat top, aesthetic grilles, very low unit height (2 meters) for
discrete installation on a roof reducing the requirement of costly
cladding solutions around the unit
- Aesthetic side anti-intrusion grilles as standard to protect the
unit during transportation and against human aggressions.
COMPRESSOR
- Exclusive Compliant Scroll® design with both axial and radial
compliance to increase compressor operation tolerance to liquid
refrigerant, substantially improving durability and reliability. 3-year
warranty*.
- Motor cooled by suction gas.
- Electronic control of the compressor discharge temperature.
- Motor protection device against high temperature or over current
situations.
- Discharge non-return valve.
- Low noise scroll compressors mounted in a sound-proofed technical
cabinet to reduce noise emissions.
- Compressors assembly installed on an independent chassis
supported by anti-vibration mountings.
- Water heat exchanger located in a technical cabinet protecting
the insulation against climatic conditions (UV light, rain).
3-year warranty*
AIR HEAT EXCHANGER
- High effi ciency aluminium Micro Channel heat exchangers (MCHX)
with improved corrosion resistance in moderate marine or urban
environment (cooling only version). 3-year warranty*.
- V-coil design to protect the unit against climatic conditions (e.g.
hail).
FANS
- Inverter fans (0 to 900 rpm operating range).
- Active Acoustic Attenuation System™ to meet changing building
load requirements while automatically adjusting the air fl ow to
respect night and day sound level constraints (adjustable setting
over time schedule with 4 time zones per day).
- Elimination of intrusive start/stop noise that is irritating to the
human ear.
- Fan-motor assembly using external rotor technology associated
with owlet high performance aluminium fan blades of the latest
generation.
- IP 54 electrical motor, class F protected against high temperature
with an internal sensor.
- Exclusive fan design with hybrid Ceramic bearings to extend the
service life of motors and to reduce noise level. With these sealed
hybrid ceramic bearings, our customer can expect little or no
maintenance of the motor throughout its life. 3-year warranty*.
- Extremely rigid fan assembly via the integration of the fans mounted
within a pre-formed bell mouth roof panel, thus improving rigidity
while reducing vibrations.
- Rounded top acoterion panels to hide the fans and reduce noise
emissions for quieter operation.
REFRIGERANT CIRCUIT
NEOSYS uses R410A refrigerant in 2 independent circuits
(minimum). Each circuit includes:
- A refrigerant charge reduced by 30% due to the use of R410A
combined with micro channel heat exchanger (NAC/Cooling only
version).
- Suction piping with thermal insulation.
- Filter drier with removable cartridge fi lter.
- Thermostatic or electronic expansion valve (Electronic device only
when "winter operation" option selected).
- Temperature sensors and pressure transducers.
- Four-way valve and liquid receiver (heat pump units only).
- Leak-tight refrigerant circuit with brazing carried out under nitrogen
by certifi ed engineers.
- Each refrigerant circuit is pressure and leak tested with a Hydrogen/
Nitrogen mixture, and vacuumed before being charged with
refrigerant. All units are then subjected to a complete functional
and operational run test to guarantee perfect sealing before
leaving the factory.
* Warranty under conditions - See page 3
• 6 •
Application Guide / NEOSYS-AGU-1801-E
TECHNICAL DESCRIPTION
ELECTRICAL BOX
- Unit electrical cabinet, components and wiring in compliance with
EN 60204-1 electrical directive.
- 400V, 50 Hz, 3 phase power supply (without neutral) with a single
point of power connection (except sizes 680 to 1080).
- Bottom entry (through the base) for electrical power.
- IP54 protection class.
- Air spring powered Butterfl y electrical panel with top opening
providing protection to the service engineers against rain or snow
during commissioning and maintenance operations.
- Recognized brand electrical components (Schneider) for ease of
maintenance.
- Main on/off switch mounted on the front panel.
- DC60 advanced user interface mounted on the front panel.
- Main disconnect switch with high trip capacity allowing optimized
sizing of the customer power supply.
- 400/24 V transformer to supply the control circuit.
- Numbered electrical wires to facilitate maintenance and diagnostic.
- Variable Frequency Drives (VFD) to control the fan speed.
CONTROL
CLIMATIC microprocessor based control is providing the following
functions:
- 4 scheduling time zones per day over 7 days to allow energy
consumption and sound level management according to the
building use and environmental constraints.
- PI control of the water temperature with operating time equalisation
of the compressors.
- Water set-point offset based on outdoor air temperature.
- Active variable speed control of all fans to optimize the unit
condensing pressure and energy performances at full- and partload while meeting authorized maximum noise level in the time
zone (Active Acoustic Attenuation System™ control patented).
- Intelligent advanced control algorithm to protect the compressors
against excessive short-cycling and to allow operation of the unit without buffer tank in most comfort air conditioning applications
(e.g. unit with fan-coils). Refer to minimum installation water loop
volume recommendations.
- Dynamic defrost to limit the number and the duration of the
defrost cycles in winter for high performance of the unit (Dynamic
Defrost patented).
- Automatic compressor unloading in case of excessive condensing
pressure allowing the operation of the machine at high outdoor
air temperature (operation extended up to 46°C ambient).
- Water pump control with operating time equalization and automatic
change-over in case of a pump fault (Twin pump only).
- Master/slave or cascade control of two chillers operating in parallel
with operating time equalization and automatic change-over in
case of a unit fault.
COMMUNICATION
The control board is equipped with a RS485 serial communication
port to allow remote management through communication bus.
According to the wished communication protocol, our control board
can be fi tted with ModBUS®, BacNET® (RS485 or TCP/IP) or
LonWorks® communication interface (options).
The main control board has free dry contacts that allow remote
control of the unit by wired cable:
- Remote on/off of the unit.
- Remote alarm reset to re-start the unit.
- Alarm or alert indications.
- Free customer contact.
With the optional extension board BE60, it is possible to get
additional customized digital or analog inputs / outputs for remote
control of the unit:
- Fault fans or pumps (dry contact).
- Operation indication at 100% on circuit 1 or 2 (dry contact).
- Dual water set-point management (dry contact).
- Force heating or cooling mode (24V AC input).
- Power limitation by disabling circuit 1 or 2 (24V AC input).
- Force unoccupied mode (24V AC input).
- Water set-point offset based on a 4-20mA signal. Note: non
available with heat-pump units.
DIRECTIVES
The unit is built to meet European norms and standards & Eurovent
certifi cation performance standards.
• DI 97/23/CE Pressure Equipment Directive.
• DI 98/37/CE Machinery Directive.
• DI 73/23/CE Low Voltage Directive.
• DI 89/336/CE Electro Magnetic Compatibility Directive
• EN 378-2 Safety and Environmental Directive.
• The European Restriction of the Use of Certain Hazardous Substances (RoHS).
CLIMATIC is pre-factory confi gured with default settings allowing
a fast commissioning on site. The DC60 advanced user interface
with graphical display is easy to use, intuitive. Main customer
parameters can be read or modifi ed without main power shut-off
(Entering/leaving water temperatures, outdoor air temperature, alarm
history, scheduling of the different time zone, water and noise level
set-points, high and low pressure reading).
The DS60 service display (optional) is a “plug and play" controller
that allows service people to read and modify all unit parameters
(Unit settings, operating time and number of compressor starts,
low and high pressure reading, read the history of last 32 faults...).
Application Guide /NEOSYS-AGU-1801-E
• 7 •
OPTIONS AND ACCESSORIES
OPTIONSDESCRIPTIONADVANTAGESMODELS
Low-pressure single-pump
hydraulic module
High-pressure single-pump
hydraulic module
Low-pressure twin-pump
hydraulic module
High-pressure twin-pump
hydraulic module
Partial heat recovery
Total heat recovery (Free
hot water : 100% heat
recovery)
Low-pressure single pump, regulating valve,
Victaulic couplings, fi lter and all necessary
hydraulic devices. Refer to specifi c chapter.
High-pressure single pump, regulating valve,
Victaulic couplings, fi lter and all necessary
hydraulic devices. Refer to specifi c chapter.
Low-pressure twin pumps, regulating valve,
Victaulic couplings, fi lter and all necessary
hydraulic devices. Refer to specifi c chapter.
High-pressure twin pumps, regulating valve,
Victaulic couplings, fi lter and all necessary
hydraulic devices. Refer to specifi c chapter.
Plate heat exchanger on each compressor
circuit allowing recovery of 20% of the rejected
heat
Recovery brazed plates heat exchanger dualcircuit mounted in parallel to the air condensers
allow 100% heat recovery in all outdoor air
conditions.
Quick start-up on job site. Available
pressure around 150 kPa.
Quick start-up on job site. Available
pressure around 250 kPa.
Quick start-up on job site. Available
pressure around 150 kPa.
Quick start-up on job site. Available
pressure around 250 kPa.
Allow free hot water production
simultaneously with unit operation
Production of free hot water at the
same time of the production of chilled
water.
NAC 200 ► 640
NAH 200 ► 480
NAC 200 ► 640
NAH 200 ► 480
NAC 200 ► 640
NAH 200 ► 480
NAC 200 ► 640
NAH 200 ► 480
NAC 200 ► 640
NAH 200 ► 300
NAC 200 ► 640
Free cooling
Winter operation (from +6°C
down to -20°C) – Cooling
only units
Brine operation (From +5°C
down to -10°C)
Anti-freeze protection (down
to -20°C)
Anti-freeze protection
of Total Heat Recovery
exchanger
Additional free cooling coils (one “V” or two “V”
depending on needed capacity) with inverter
fans and motorised valves.
Unit fi tted with electronic expansion valve and
variable frequency driven fans. Select “antifreeze protection” option if no glycol water
Unit fi tted with electronic expansion valve,
variable frequency driven fans and reinforced
evaporator and piping thermal insulation.
Resistance heaters on the evaporator,
hydraulic module and partial heat recovery if
selected. To be selected if no glycol water.
Resistance heater and insulation of the
recovery exchanger, to be selected if no glycol
water.
Allow the chilled water to run through
the free-cooling system, which uses
less power and utilises the lower
ambient air to cool the water.
Increased operating range in
cooling down to -20°C ambient
temperature. (Standard on sizes
540/600/640/1080).
Increased operating range in
cooling down to -10°C water leaving
temperature for thermal storage or
process cooling.
Evaporator and hydraulic module
frost protection down to -20°C
ambient temperature
The recovery exchanger have frost
protection down to -20°C ambient
temperature.
NAC 200 ► 540
NAC 200 ► 480
NAC 680 ► 960
NAC 200 ► 1080
NAC 200 ► 1080
NAH 200 ► 480
NAC 200 ► 640
Heavy anti-corrosion coil
treatment
Rear protection grilleMetallic grille fi tted at the back of the unit
• 8 •
Application of LenGuard treatment on the
entire coil surface.
High corrosion resistance for
severe industrial, marine and dirty
environments.
Prevents the rear V-coil against
possible damage
Application Guide / NEOSYS-AGU-1801-E
NAC 200 ► 1080
NAH 200 ► 480
NAC 200 ► 640
NAH 200 ► 480
OPTIONS AND ACCESSORIES
OPTIONSDESCRIPTIONADVANTAGESMODELS
Soft starter
Power Factor correctionCapacitors fi tted into the unit
Electric meter
Single main power
connection
BE60 extension board for
additional inputs/outputs
Modbus communication
interface
Electronic soft starter fi tted into the electrical
cabinet
Active energy total counter, power factor,
operating time counter, max. active power
demand, ModBus.
Electrical cabinet equipped with one single
point of connection and power cut-off for the
complete unit.
Electronic extension board with additional
analog inputs (4), digital inputs (4) and digital
outputs (4). See control manual.
Communication card using ModBus/JBus
protocol with RS485 or TCP/IP connection.
Start-up current reduced by 15 % up
to 30 %.
Cos phi correction up to 0.95
to reduce current and energy
consumption.
This device allows monitoring of the
unit electric power consumption on
the unit and from a BMS
Allow easy electrical connection
with one single cable instead of two
cables
Relay card for remote control and
alarm report using dry contacts, 24
Vac or 4-20 mA signals.
Communication interface with a
building management system.
NAC 200 ► 1080*
NAH 200 ► 480
NAC 200 ► 1080
NAH 200 ► 480
NAC 200 ► 1080
NAH 200 ► 480
NAC 680 ► 1080
NAC 200 ► 1080
NAH 200 ► 480
NAC 200 ► 1080
NAH 200 ► 480
LonWorks® communication
interface
BACnet® communication
interface
Communication card using LonTalk® protocol
with FTT-10A connection.
Communication card using Bacnet® protocol
with RS485 or TCP/IP connection.
Communication interface with a
building management system.
Communication interface with a
building management system.
*except in case of main power connection option
NAC 200 ► 1080
NAH 200 ► 480
NAC 200 ► 1080
NAH 200 ► 480
ACCESSORIESDESCRIPTIONADVANTAGESMODELS
This protection must be fi tted in
Water fi lter
Flange connection
Anti-vibration mounts
DC60 remote comfort
display
1000 microns water Y fi lter delivered with
piping and fl ange connections.
Two connections sleeves with victaulic groove
and fl ange on opposite side.
Rubber anti-vibration mounts to be mounted
under the unit.
Customer display located at 600 meters
maximum from the unit.
the customer water supply piping
to protect the evaporator from any
possible impurities.
Allow easy connection with fl anges
on customer side.
Reduction of the transmission of
vibration to the ground and the
general level.
Remote customer parameter reading
and modifi cation.
NAC 200 ► 1080
NAH 200 ► 480
NAC 200 ► 1080
NAH 200 ► 480
NAC 200 ► 1080
NAH 200 ► 480
NAC 200 ► 1080
NAH 200 ► 480
Plug and play display delivered with 1 meter
DS60 service display
Adalink™ supervision
Application Guide /NEOSYS-AGU-1801-E
cable and connector for quick connection on
Climatic controller.
Electronic board with RS485 cables, RJ11
phone cable, Ethernet cable and power supply
cable.
Display for service technicians only.
Remote supervision of the unit via an
intuitive web page.
NAC 200 ► 1080
NAH 200 ► 480
NAC 200 ► 1080
NAH 200 ► 480
• 9 •
GENERAL DATA
COOLING ONLY
410AR
NAC
NEOSYSNAC200230270300340380
Cooling mode
Cooling capacity
Total absorbed power
(1)
EER
(2)
ESEER
Comfort
applications
tions
Process
applica-
Refrigeration circuit
Number of circuit
Refrigerant load per circuit (R410A)
Type of expansion valveThermostatic expansion valve
CompressorsScroll - Hermetic
Number of compressors
Capacity steps
Oil typeMOBIL EAL Arctic 22CC or ICI EMKARATE RL32CF
Oil load per compressorl
(1)
(1)
Seasonal Energy Effi ciency Ratio
(3)
SEER
Seasonal energy efficiency
(4)
ɳs,c
Seasonal Energy Performance Ratio
SEPR - High temperature (7°C)
Seasonal Energy Performance Ratio
SEPR - Medium temperature (-8°C)
EvaporatorAISI 304 stainless steel plate brazed with copper heat exchanger
Water fl ow rate
(1)
Water volumel
Pressure drop
(1)
Water operating pressure
m3/h35,840,646,952,960,466,6
131316243535
kPa
43,054,155,948,134,741,6
600
Hydraulic connectionsVictaulic
Water inlet/outlet
Electrical data
Start-up intensity
Maximum current
(1) EUROVENT certifi ed data, in accordance
with standard EN14511 :
Water inlet/outlet temperature = 12°C / 7°C
Outdoor air temperature = 35°C.
(2) ESEER following Eurovent calculation
method, in accordance with standard
EN14511
(3) SEER in accordance with standard
EN14825.
(4) Following ecodesign regulation nr
EU 2016/2281 on space cooling,
normalized leaving water temperature
at 7°C, in accordance with standard
EN14825.
(5) Following ecodesign regulation nr
EU 2016/2281 on process cooling units,
normalized leaving water temperature
at 7°C, in accordance with standard
EN14825.
4"4"4"4"5"5"
400V / III / 50 Hz
393,9446,5475,7498,0527,9572,0
A
166,5195,8225,0247,3277,2321,3
(6) Following ecodesign regulation nr
EU 2015/1095 on process cooling chillers,
normalized leaving water temperature
at -8°C, in accordance with standard
EN14825.
• 10 •
Application Guide / NEOSYS-AGU-1801-E
GENERAL DATA
COOLING ONLY
410AR
NAC
NEOSYSNAC420480540600640
Cooling mode
Cooling capacity
Total absorbed power
(2)
EER
(3)
ESEER
Comfort
applications
tions
Process
applica-
Refrigeration circuit
Number of circuit
Refrigerant load per circuit (R410A)
Type of expansion valveThermostatic expansion valveElectronic expansion valve
CompressorsScroll - Hermetic
Number of compressors
Capacity steps
Oil typeMOBIL EAL Arctic 22CC or ICI EMKARATE RL32CF
Oil load per compressor
(1)
(1)
Seasonal Energy Effi ciency Ratio
(3)
SEER
Seasonal energy efficiency
(4)
ɳs,c
Seasonal Energy Performance Ratio
SEPR - High temperature (7°C)
Seasonal Energy Performance Ratio
SEPR - Medium temperature (-8°C)
kW
429,6489,9530,9605,0626,9
152,3174,3201,9219,1226,1
2,822,812,632,762,77
4,194,014,04,154,17
4,124,114,174,154,17
%162161164163164
(5)
(6)
5,025,045,025,015,01
3,503,603,603,703,70
2
kg34343442,542,5
6
14-33-48-67-81-
%
(6,3x3)
+ (6,8x3)
100
17-33-50-67-
83-100
(6,3x3)
+ (6,3x3)
18-33-51-67-
85-100
(6,3x3)
+ (6,3x3)
17-33-50-67-
83-100
(6,3x3)
+ (6,3x3)
17-33-50-67-
83-100
(6,3x3)
+ (6,3x3)
CondenserMicrochannel aluminium tube and fi ns - Air cooled
Number of condenser
8881010
Fan & MotorVariable speed fans
Number of fans
Diameter
mm800
8881010
Maximum speedVariable speed - 900 rpm maximum
Nominal air fl ow (100%)
Total motor power input (900 rpm)
3
m
/h174 400174 400174 400218 000218 000
kW12,812,812,81616
EvaporatorAISI 304 stainless steel plate brazed with copper heat exchanger
Water fl ow rate
(1)
Water volume
Pressure drop
(1)
Water operating pressure
3
m
/h73,984,391,3104,1107,9
3543435256
kPa
50,348,856,759,058,4
600
Hydraulic connectionsVictaulic
Water inlet/outlet
Electrical data
Start-up intensity
Maximum current
(1) EUROVENT certifi ed data, in accordance
with standard EN14511 :
Water inlet/outlet temperature = 12°C / 7°C
Outdoor air temperature = 35°C.
(2) ESEER following Eurovent calculation
method, in accordance with standard
EN14511
(3) SEER in accordance with standard
EN14825.
A
(4) Following ecodesign regulation nr
EU 2016/2281 on space cooling,
normalized leaving water temperature
at 7°C, in accordance with standard
EN14825.
(5) Following ecodesign regulation nr
EU 2016/2281 on process cooling units,
normalized leaving water temperature
at 7°C, in accordance with standard
EN14825.
5"5"6"6"6"
400V / III / 50 Hz
594,8638,9765,9817,0817,0
344,1388,2431,7482,8482,8
(6) Following ecodesign regulation nr
EU 2015/1095 on process cooling chillers,
normalized leaving water temperature
at -8°C, in accordance with standard
EN14825.
Application Guide /NEOSYS-AGU-1801-E
• 11 •
GENERAL DATA
COOLING ONLY
410AR
NAC
NEOSYSNAC6807608409601080
Cooling mode
Cooling capacity
Power input
(2)
EER
(3)
ESEER
Comfort
applications
tions
Process
applica-
Refrigeration circuit
Number of circuit
Refrigerant load per circuit (R410A)
Type of expansion valveThermostatic expansion valve
Compressors
Number of compressors
Type of compressorScroll - Hermetic
Capacity steps
Oil typeMOBIL EAL Arctic 22CC or ICI EMKARATE RL32CF
Oil load per compressorl
CondenserMicrochannel aluminium tube and fi ns
Number of condenser
Fan & MotorVariable speed fans
Number of fans
Diameter
Maximum speedVariable speed - 900 rpm maximum
Nominal air fl ow (100%)
Total motor power input (900 rpm)
EvaporatorAISI 304 stainless steel plate brazed with copper heat exchanger
Water fl ow rate
Water volumel
Pressure drop
Water operating pressure
Hydraulic connectionsVictaulic
Water inlet/outlet
Electrical data
Start-up intensity
Maximum current
(1)
(1)
Seasonal Energy Effi ciency Ratio
(3)
SEER
Seasonal energy efficiency
(4)
ɳs,c
Seasonal Energy Performance Ratio
SEPR - High temperature (7°C)
Seasonal Energy Performance Ratio
SEPR - Medium temperature (-8°C)
(1)
(1)
kW
702,6774,7859,1979,81061,9
251,3298,2304,6348,7403,8
2,802,602,822,812,63
4,153,914,214,014,0
4,144,144,224,114,11
%163163166162162
(5)
(6)
5,055,035,015,045,01
3,603,503,503,603,60
4
kg
22,4/19,3/
22,4/19,3
22,4/19,4/
22,4/19,4
343434
Electronic expan-
sion valve
1010121212
9-18-30-41-
%
50-59-70-82-
[(6,8x3) +
(6,3x2)] x 2
91-100
10-20-30-4050-60-70-80-
90-100
[(6,3x3) +
(6,3x2)] x 2
8-15-24-33-
41-48-58-67-
74-82-91-100
[(6,3x3) +
(6,8x3)] x 2
8-17-25-33-
42-50-58-67-
75-83-92-100
[(6,3x3) + (6,3x3)] x 2
8-15-24-33-41-48-
58-67-74-82-91-
100
1212161616
1212161616
mm800
3
m
/h261 600261 600348 800348 800348 800
kW19,219,225,625,625,6
3
m
/h120,9133,3147,8168,6182,7
275290300335345
kPa
57,051,356,066,071,0
600600600600600
8"
400V / III / 50 Hz
805,2893,3939,01027,11197,6
A
554,5642,6688,3776,4863,4
(1) EUROVENT certifi ed data, in accordance
with standard EN14511 :
Water inlet/outlet temperature = 12°C / 7°C
Outdoor air temperature = 35°C.
(2) ESEER following Eurovent calculation
method, in accordance with standard
EN14511
(3) SEER in accordance with standard
EN14825.
• 12 •
(4) Following ecodesign regulation nr
EU 2016/2281 on space cooling,
normalized leaving water temperature
at 7°C, in accordance with standard
EN14825.
(5) Following ecodesign regulation nr
EU 2016/2281 on process cooling units,
normalized leaving water temperature
at 7°C, in accordance with standard
EN14825.
(6) Following ecodesign regulation nr
EU 2015/1095 on process cooling chillers,
normalized leaving water temperature
at -8°C, in accordance with standard
EN14825.
Application Guide / NEOSYS-AGU-1801-E
GENERAL DATA
COOLING ONLY
410AR
NAC
Acoustic data
NEOSYSNAC200230270300340380
Active Acoustic Attenuation System™
Global sound power level
Sound pressure level 10 meters from the unit
Minimum global sound power level with A
Minimum sound pressure level with A3 system
10 meters from the unit
NEOSYSNAC420480540600640
Global sound power level
Sound pressure level 10 meters from the unit
Minimum global sound power level with A
Minimum sound pressure level with A3 system
10 meters from the unit
NEOSYSNAC6807608409601080
Global sound power level
Sound pressure level 10 meters from the unit
Minimum global sound power level with A
Minimum sound pressure level with A3 system
meters from the unit
(1) All data are at Eurovent condition,
(1)
89,289,389,791,291,391,4
575758595959
3
system
(3)
(3)
dB(A)
82,282,884,485,085,585,9
515254545555
Active Acoustic Attenuation System™
(1)
92,592,693,094,094,0
6161616262
3
system
(3)
(3)
dB(A)
86,586,888,289,389,3
5656575959
Active Acoustic Attenuation System™
(1)
94,394,495,595,696,0
6262646464
3
system
(3)
(3)
- 10
dB(A)
88,588,989,589,891,2
5858595960
Gross cooling capacity with 12/7°C water temperature and 35°C air ambient.
Gross heating capacity with 7°C air inlet temperature and 40/45°C water temperature.
EER and COP according to EN14511 Eurovent calculation method
Dimensional data
NEOSYSNAC 200230270300340380420480540600640
Dimensions
Length
mmWidth
Height
Footprintm²
Operating weight
kg
Shipping weight
NEOSYSNAC6807608409601080
Dimensions
Length
mmWidth
Height
Footprintm²
Operating weight
kg
Shipping weight
3590462056506680
2280228022802280
2025202520252025
8,210,512,915,2
19832011227826763003304535803661371241524175
19611989225326432955299735323604365540864105
904011100
22802280
19641964
20,625,3
67706854798181418229
64956564768178067884
Application Guide /NEOSYS-AGU-1801-E
• 13 •
GENERAL DATA
HEAT PUMP
410AR
NAH
NEOSYSNAH200230270300
Cooling mode
Cooling capacity
Total absorbed power
Full load amps
(1)
EER
(2)
ESEER
tions
applica-
Comfort
tions
Process
applica-
Heating mode
Heating capacity
Power input
Full load amps
(3)
COP
Comfort
applications
CompressorsScroll - Hermetic
Number of compressors
Capacity steps
Oil typeMOBIL EAL Arctic 22CC or ICI EMKARATE RL32CF
Oil load per compressor
Refrigeration circuit
Number of circuit
Refrigerant load per circuit (R410A)
Type of expansion valveThermostatic expansion valve
CondenserCopper tube - Aluminium fi n - Air-cooled
Number of condenser
Fan & MotorVariable speed fans
Number of fans
Diameter
Maximum speedVariable speed - 900 rpm maximum
Nominal air fl ow (100%)
Total motor power input
EvaporatorAISI 304 stainless steel plate brazed with copper heat exchanger
Water fl ow
Water volume
Pressure drop
Water operating pressure
Hydraulic connectionsVictaulic
Water inlet/outlet
Electrical data
Starting current
Maximum current
(1) EUROVENT certifi ed data, in accordance with
standard EN14511 :
Water inlet / outlet temperature = 12 °C / 7 °C
Outdoor air temperature = 35 °C.
(2) ESEER following Eurovent calculation method,
in accordance with standard EN14511
(3) Following ecodesign regulation nr
EU 2016/2281 on space cooling, normalized
leaving water temperature at 7 °C, in
accordance with standard EN14825.
(1)
(1)
(1)
Seasonal Energy Effi ciency Ratio
SEER
Seasonal energy effi ciency
(3)
ɳs,c
Seasonal Energy Performance Ratio
SEPR - High temperature (7°C)
Seasonal Energy Performance Ratio
SEPR - Medium temperature (-8°C)
(1)
(1)
(1)
Seasonal energy effi ciency
(8)
SCOP
Seasonal energy effi ciency
(7)
ɳs,h
Seasonal energy effi ciency class
(1)
(1)
(9)
kW
A127,9150,7185,6203,5
(4)
%154154154157
(5)
(6)
kW
A125,9145,3172,8192,5
%134130132135
%
kg28284042
mm800
3
/h76 00076 000114 000114 000
m
kW6,46,49,69,6
3
m
/h32,937,346,650,8
kPa
A
(4) SEER in accordance with standard
EN14825.
(5) Following ecodesign regulation nr
EU 2016/2281 on process cooling units,
normalized leaving water temperature at 7°C,
in accordance with standard EN14825.
(6) Following ecodesign regulation nr
EU 2015/1095 on process cooling chillers,
normalized leaving water temperature at
-8°C, in accordance with standard EN14825
191217271295
73,586,7106,7117,0
2,602,502,542,52
4,003,763,993,94
3,933,913,924,00
5,205,045,065,01
3,153,203,023,09
219235291339
71,784,0104,3112,7
3,052,802,783,01
3,443,323,393,45
A+
4
31 - 62 81 - 100
(3,2+6,8)
+ (3,2+6,8)
34 - 68 84 - 100
(3,2+6,3)
+ (3,2+6,3)
28 - 57 78 - 100
(6,8+6,3)
+ (6,8+6,3)
25 - 50 75 - 100
(6,3x2)
+ (6,3x2)
2
4466
4466
202023,223,2
36,746,455,244,7
600
4"
400V / III / 50 Hz
393,9446,5483,3512,7
166,5195,8232,6262,0
(7) SCOP in accordance with standard
EN14825. Heating mode performance is
defi ned for average climate.
(8) Following ecodesign regulation nr
EU 813/2013 on space heaters, normalized
leaving water temperature at 7°C, in
accordance with standard EN14825, average
climate.
(9) Following energy labelling regulation nr
EU 811/2013 on space heaters.
• 14 •
Application Guide / NEOSYS-AGU-1801-E
GENERAL DATA
HEAT PUMP
410AR
NAH
NEOSYSNAH340380420480
Cooling mode
Cooling capacity
Total absorbed power
Full load amps
(1)
EER
(2)
ESEER
tions
applica-
Comfort
tions
Process
applica-
Heating mode
Heating capacity
Power input
Full load amps
(3)
COP
Comfort
applications
CompressorsScroll - Hermetic
Number of compressors
Capacity steps
Oil typeMOBIL EAL Arctic 22CC or ICI EMKARATE RL32CF
Oil load per compressorl
Refrigeration circuit
Number of circuit
Refrigerant load per circuit (R410A)
Type of expansion valveThermostatic expansion valve
CondenserCopper tube - Aluminium fi n - Air-cooled
Number of condenser
Fan & MotorVariable speed fans
Number of fans
Diameter
Maximum speedVariable speed - 900 rpm maximum
Nominal air fl ow (100%)
Total motor power input
EvaporatorAISI 304 stainless steel plate brazed with copper heat exchanger
Water fl ow
Water volumel
Pressure drop
Water operating pressure
Hydraulic connectionsVictaulic
Water inlet/outletInches
Electrical data
Starting current
Maximum current
(1) EUROVENT certifi ed data, in accordance with
standard EN14511 :
Water inlet / outlet temperature = 12 °C / 7 °C
Outdoor air temperature = 35 °C.
(2) ESEER following Eurovent calculation method,
in accordance with standard EN14511
(3) Following ecodesign regulation nr
EU 2016/2281 on space cooling, normalized
leaving water temperature at 7 °C, in
accordance with standard EN14825.
(1)
(1)
(1)
Seasonal Energy Effi ciency Ratio
SEER
Seasonal energy effi ciency
(3)
ɳs,h
Seasonal Energy Performance Ratio
SEPR - High temperature (7°C)
Seasonal Energy Performance Ratio
SEPR - Medium temperature (-8°C)
(1)
(1)
(1)
Seasonal energy effi ciency
(8)
SCOP
Seasonal energy effi ciency
(7)
ɳs,h
Seasonal energy effi ciency class
(1)
(1)
kW
A223,3231,4269,7311,9
(4)
%166165162163
(5)
(6)
kW
A125,9145,3172,8192,5
%136132130131
(9)
%
kg42505252
mm800
3
/h114 000152 000152 000152 000
m
kW9,612,812,812,8
3
/h55,762,168,478,1
m
kPa
A
(4) SEER in accordance with standard
EN14825.
(5) Following ecodesign regulation nr
EU 2016/2281 on process cooling units,
normalized leaving water temperature at 7°C,
in accordance with standard EN14825.
(6) Following ecodesign regulation nr
EU 2015/1095 on process cooling chillers,
normalized leaving water temperature at
-8°C, in accordance with standard EN14825
324361397454
128,4133,1155,1179,4
2,522,712,562,53
4,014,083,864,14
4,234,204,124,16
5,215,255,115,12
3,233,093,113,19
363404452499
121,3132,9151,7169,5
3,003,042,982,95
3,473,393,333.35
A+
5666
18 - 41 - 59 -
82 - 100
(6,8 x 3)
+ (6,3 x 2)
17 - 33 - 50 - 67
- 83 - 100
(6,8 x 3)
+ (6,8 x 3)
14 - 33 - 48 - 67
- 81 - 100
(6,3 x 3)
+ (6,8 x 3)
17 - 33 - 50 - 67
- 83 - 100
(6,3 x 3)
+ (6,3 x 3)
2
6888
6888
34,634,634,642,7
29,836,543,642,3
600
5"
400V / III / 50 Hz
527,9579,6594,8638,9
277,2328,9344,1388,2
(7) SCOP in accordance with standard
EN14825. Heating mode performance is
defi ned for average climate.
(8) Following ecodesign regulation nr
EU 813/2013 on space heaters, normalized
leaving water temperature at 7°C, in
accordance with standard EN14825, average
climate.
(9) Following energy labelling regulation nr
EU 811/2013 on space heaters.
Application Guide /NEOSYS-AGU-1801-E
• 15 •
GENERAL DATA
HEAT PUMP
410AR
NAH
Acoustic data
NEOSYSNAH200230270300340380420480
Active Acoustic Attenuation System™
Global sound power level
Sound pressure level
10 meters from the unit
Minimum global sound power level with A
Minimum sound pressure level with A3 system
10 meters from the unit
(1) All data are at Eurovent condition,
(1)
dB(A)
3
system
(3)
(3)
89,289,391,191,291,392,491,591,6
5757595959616161
82,282,884,985,085,586,186,286,5
5152545455565656
Gross cooling capacity with 12/7°C water temperature and 35°C air ambient.
Gross heating capacity with 7°C air inlet temperature and 40/45°C water temperature.
EER and COP according to EN14511 Eurovent calculation method
Thanks to multi step capacity control and smart anti-short compressor cycling, NEOSYS can work with minimum water loop volume
as defi ned here below. This can eliminate the need for a buffer tank in most of air-conditioning applications (e.g. NEOSYS application
with fan-coil units).
Vmini = 86 x Q / (Nstages x Dt)
V
Q
Where :
NstageNumber of control steps available in the unit
Dt
Important note: In case NEOSYS is used in air-conditioning applications with a short water system (e.g. NEOSYS application with air
handling units) or in case NEOSYS is used for industrial process cooling, it is mandatory to use a buffer tank.
Minimum water content of the installation
Cooling capacityof the chiller
Maximum acceptable temperature rise (Dt = 6°c for an air conditioning application)
The maximum water content of the installation is determined by the capacity of the expansion vessel.
On units fi tted with a standard Hydraulic Module it is possible to determine the maximum water content of the installation.
Max. volume clear water (l)Max. volume Glycol water (l)
Unit Size
200-230-270
300-340-380
420-480
540
600-640
Expansion
vessel
volume
50 l1,5 Bar5 230 l4 180 l4 020 l3 210 l
Pressure in
the expansion
vessel
Static pressureStatic pressure
5 m10 m5 m10 m
GLYCOL CORRECTION FACTOR
Minimum ambient temperature or water
outlet temperature
+ 5°C ► 0°C10%1,051,020,990,994
Ethylene
glycol
Pressure
drop
Water
fl ow
CAPACITIES
CoolingHeating
0°C ► -5°C20%1,101,050,980,993
- 5°C ► -10°C30%1,151,080,970,99
- 10°C ► -15°C35%1,181,100,960,987
Example : 10% glycol
Minimum fl ow : 1,19 m3/h x 1,02
Pressure drop x 1,07
System capacity x 0,99
Application Guide /NEOSYS-AGU-1801-E
• 21 •
HYDRAULIC DATA
MINIMUM WATER FLOW THROUGH THE EVAPORATOR
In case of installation with fi xed speed pump, to prevent from freezing risk, the fl ow rate through the evaporator must be higher than
the minimum fl ow given in the table below.
In case of variable primary fl ow, the pump speed must be controlled through the CLIMATIC control. Additionally, the hydraulic system
must be properly designed and balanced to ensure a right water fl ow distribution through the chiller evaporator and the terminal units.
This is especially important when the system is designed with fan coils equipped with two-way valves. When the two-way valves are
closing in response to building load change, it is important that the system is designed to ensure a minimum evaporator fl ow that is
always minimum 60% of the chiller’s design fl ow rate. This can be done with a bypass from chilled water supply to chilled water return
opened via a signal from a fl ow meter.
Additionnaly, some terminals can be fi tted with three way control valves in order to ensure the fl ow will not drop below the minimum
value at any load condition as indicated in the table below.
Important note : The water fl ow must not vary by more than 10% per minute. If the fl ow rate changes more rapidly, the system should
contain a minimum of 6,5 litres of water per kW instead of 3 l/kW.
• 22 •
Application Guide / NEOSYS-AGU-1801-E
HYDRAULIC EQUIPMENT
eDrive™ TECHNOLOGY, THE RIGHT CHOICE TO SAVE 75% OF PUMP ENERGY COSTS.
LENNOX offers the eDrive, a variable speed drive pump option (with single or double pump) which modulates the water fl ow through
the evaporator and reduces energy costs. This option is available on chillers and heat pumps from 20 to 1000 kW.
In a water system, one major contributor to annual energy consumption is the pump motor. Pumping energy cost can represent 20%
of the total cost of owning a chiller. This ratio can be even bigger for a heat-pump.
eDrive™ variable speed driven pump is contributing to continuous Lennox efforts to save energy while exploring possibilities
to reduce installation cost.
eDrive™ variable speed driven pump benefi ts:
• Cost savings on the energy consumption especially at part-load conditions and during off period.
75% of this energy could be saved !
• Cost savings on the initial system cost. Fewer pumps and piping connections than primary–secondary systems, terminal units
equipped with two-way control valves instead of three-way valves, elimination of water fl ow set valve.
• Flexibility and accuracy in the pump operation control (smooth start and stop, gradual change of speed, accuracy and stability of
control)
• Reduction of the repeated stress on the pump and piping resulting in longer equipment life time (elimination of the «hammer blow»
in pipes).
• Elimination of the start-up current thanks to variable frenquency drive that controls a gradual pump motor supply.
Designing a VWF chilled water plant that performs reliably at all load conditions requires careful attention to chiller design. Thanks
to the newest generation of chiller controllers and intensive testing, NEOSYS can now reliably maintain the desired chilled water
temperature with a fl ow range from 60% to 100% that gives up to 75% annual energy savings.
LENNOX eDrive™ Technology modulates the Water Flow especially in Part-Load Conditions through a Specifi c Algorithm and a
Variable Frequency Driver.
Typical cost split in a chiller through 15-year lifespan
Chiller with fixed speed pumpChiller with variable speed pump
20 %
10 %
22 %
Energy savings
15 %
47 %
10 %
23 %
5 %
47 %
Cooling energy costMaintenance cost
Equipment costPump energy cost
Application Guide /NEOSYS-AGU-1801-E
• 23 •
0
10
20
30
40
50
60
70
80
90
100
0
10
20
30
40
50
60
70
80
90
100
HYDRAULIC EQUIPMENT
eDrive™ VARIABLE WATER FLOW SAVES YOUR MONEY IN THE ENERGY COST
• Through the elimination of the energy normally lost in the water fl ow control valve during unit full-load operation (Variable water
fl ow = perfect pump curve adjustment to the required nominal water fl ow and delta P)
• Through pump rotation speed reduction during unit part-load operation.
• Thanks to pump running at minimum speed during Chiller “off” period (night, unoccupied)
Pump energy consumption
Fan coil with 3 way valves and constant T
PUMP AFFINITY LAWS
“The power required for pumps varies as the
Energy
20% water fl ow reduction = 50% energy reduction.
40% water fl ow reduction = 80% energy reduction.
cube of the fl ow rate.”
100% load75% load50% load25% loadOff
Chiller load
Fixed speed pumpVariable speed pump
eDrive™ VARIABLE WATER FLOW MAY SAVE MONEY IN THE SYSTEM DESIGN COST
Variable speed
drive
Terminal unit
1
Terminal unit
2
Terminal unit
...
Control
valve
Water pressure
transducer
Pump
Balancing
valve
PP
By-pass valve
Variable primary fl ow system with constant pressure
A variable primary fl ow design uses fewer components than primary–secondary systems as the pumps of the secondary distribution
loop and the mixing tank are eliminated.
When compared with constant primary fl ow systems, terminal units can equipped with two-way control valves instead of three-way valves
often used in constant volume systems. Using two-way valves instead of three-way valve on fan coils represent a budget reduction
that pays for the variable frequency driver cost. On top of that, the water fl ow set valve is eliminated as the pump adjustment to real
installation needs can be done electronically. These factors may reduce the initial cost of the chilled water system
• 24 •
Application Guide / NEOSYS-AGU-1801-E
HYDRAULIC EQUIPMENT
eDrive™ VARIABLE WATER FLOW BY LENNOX
3 control modes available :
Constant speed
• Interest to set the right installation design fl ow (avoid setting valve).
Constant Delta P (setting to declare the required working pressure)
• Implementation and management adapted to systems with two-way valves and bypass of the installation to ensure a minimum
water fl ow back into the evaporator.
Constant Delta T (Setting to declare the required delta T)
• Need a good installation with well balanced circuits to ensure good fl ow distribution when the fl ow is reduced.
• Installation with terminal units fi tted with 3-way valves.
Operation for each mode:
• Constant speed : eDrive pilots the pump to the water fl ow desired when the compressors are in operation. When the compressors
are stopped (dead zone), control will automatically reduce the speed of the pump to the minimum water fl ow This minimum fl ow
is also adjustable within minimum 30Hz (60% fl ow).
• Constant delta P : the eDrive™ regulation is managing the pump to maintain the required delta P in order to keep constant the
customer available static pressure. When the terminals control valves close in response to decreased building loads, the pump
controller slows the pump speed to maintain the target delta P. In this mode the pump does not detect terminal capacity reduction
(fan speed staging)
• Constant Delta T : the eDrive™ regulation is managing the pump to maintain the required Delta T. When the Delta T is increasing
in response to the number of compressors running, the pump controller increases the speed of the pump. Conversely, when the
compressors are stopping in response to decreased building loads, the pump controller slows the pump speed to maintain the
target Delta T.
Safety parameters:
• If the evaporating pressure reaches the low limit (risk of evaporator frosting), the fl ow is increased.
• If the outlet evaporator temperature reaches the low limit, the fl ow is set to the maximum.
• When the pump speed varies and the fl ow switch trips, the fl ow is automatically increased.
• During defrost procedure (HP), the fl ow is set to the maximum.
• Pump motor supply range from 30 Hz minimum to 50Hz maximum. Minimum pump motor frequency set at 30 Hz. Below this value,
risk of pump motor failure due to overheat.
• For safe operation of the chiller, the unit is protected by the fl ow switch.
• Minimum and maximum admissible water fl ow per unit size: with constant delta T, the fl ow may vary from 60% to 100% of the
selected pump nominal fl ow.
• Maximum change in fl ow rate through the evaporator: a 10% per minute change in fl ow rate is admissible in most of air conditioning
applications.
Application Guide /NEOSYS-AGU-1801-E
• 25 •
HYDRAULIC EQUIPMENT
Installation instructions to respect in case of variable primary fl ow:
• The hydraulic system will have to be properly designed and balanced to ensure a right water fl ow distribution through the chiller
evaporator and the terminal units.
• The hydraulic system will have to be properly designed to respect minimum and maximum water fl ow through each chiller following
the values given by the manufacturer.
Case of constant Delta P mode :
• In case of system designed with terminal units equipped with 2 way valves, the hydraulic system will need to have a bypass fl ow
to ensure a minimum water fl ow through the chiller evaporator.
Méthode de by-pass :
• Bypass adequate water fl ow can be achieved with a slow modulating opening as soon as the water fl ow rate is near the mini-
mum. When the water fl ow rises according to predefi ned setting, this valve closes. This bypass modulating valve provided by
LENNOX (contact customer service) is controlled by our Climatic control. The bypass should be positioned at the beginning of
the installation near the unit and allows signifi cant energy savings and cost as opposed to a location at the end of the system.
• An alternative is to install some 3-way valves at different points of the terminal units. This approach allows constant minimum
fl ow in the chiller or heat pump and ensures a cheaper system.
• The minimum water fl ow through the chiller evaporator will need to respect a minimum value that is 60% of the nominal chiller
water fl ow.
• The fl ow bypass from chilled water supply to chilled water return can be done with a motorized bypass valve opened via a signal
from a fl ow meter.
• For safe operation some terminals can be equipped with three way control valves in order to ensure the fl ow will not drop below
the minimum value at any load condition.
• The water fl ow must not vary by more than 10% per minute. If the fl ow rate changes more rapidly, the system should contain a
minimum of 6,5 liters of water per kW instead of 3 liters/kW.
• Check the control valve authority in low load periods, especially in case of long pipe hydraulic systems.
• 26 •
Application Guide / NEOSYS-AGU-1801-E
PARTIAL HEAT RECOVERY
Compared with the basic confi guration, this option features an additional refrigerant/water
heat exchanger on the compressor discharge line, allowing recovery of 15% of the rejected
heat. This heat exchanger is large enough to recover heat for the production of free hot
water simultaneously with chilled water production. The heating capacity of the heat recovery
circuit is approximately equal to the power input of the compressor.
Typical heat recovery applications can be facilities with high domestic hot water usage,
such as health care, hotels, etc.
Notes:
This option is available on cooling only and heat-pump versions.
Heat recovery can only occur when the unit is running either in cooling or heating mode.
Partial heat recovery
Free hot water up to 70°C
Air cooled condenser
Desuperheater
Electronic expansion valve
Partial heat recovery
Scroll compressor
Evaporator
Water in/out: 50/55 °CWater in/out: 55/60 °CWater in/out: 50/60 °C
Water fl ow in m3 per hourWater pressure drop in KPa
417,186,00325,624373,262
529,119,00437,556484,222
569,817,00447,735504,402
6511,399,17529,136595,192
7913,849,806411,246726,342
10117,6914,288314,5810938,183
9115,949,177312,826827,222
10618,5712,008615,118968,453
14325,0515,0011820,731112911,354
15026,2813,0012221,43913611,973
15427,0713,3312522,07913912,333
Wf
3
(m
/h)Dp(kPa)
Recovery
(kW)
Wf
(m3/h)Dp(kPa)
Recovery
(kW)
Wf
(m3/h)Dp(kPa)
Application Guide /NEOSYS-AGU-1801-E
• 27 •
TOTAL HEAT RECOVERY
Heat recovery is one of our solutions to decrease and offset energy
bills continually on the rise.
NEOSYS with Heat Recovery option operate as a standard chiller
as long as heat is not required or simultaneously produce chilled
and hot water which can be used for applications like preheating
of a boiler, heating or domestic hot water.
Heating or preheating in series with a boiler, the heat recovery
option enables to reduce :
- Purchase and installation cost : boiler is undersized.
- Operating cost : free hot water when unit produce chilled
water.
In series with an auxiliary heater , this option can also replace the
heater in low temperature heating systems.
A heat recovery chiller is suitable for all industrial process requiring
both chilled and hot water.
The LENNOX total heat recovery system on NEOSYS :
- Parallel assembly, stainless steel brazed plate heat exchanger
mounted in parallel to the air condensers maintain maximum
performance and effi ciency whatever the conditions : 100%
heat recovery in opposite of series assembly.
- Free hot water from 25 to 55°C
- Very Low refrigerant charge, no additional refrigerant charge
thanks to braze plate heat exchanger.
- High Total Energy Ratio values : TER (*)
- Standard Features factory mounted and tested:
• Stainless steel heat exchanger with control
• Paddle water fl ow switch
• Temperature hydraulic sensors
• Victaulic coupling
• 3 way valve ( 0-10V) for cold start
• On/Off pump control
• Antifreeze protection + insulation (in option)
(*) TER: Total Effi ciency Ratio is the total energy effi ciency of the units
when there is a production of chilled water and hot water simultaneously.
Cold water and hot water are valuated to the total power consumption
of the unit: TER = (cooling capacity + recovered heating capacity) / total
power consumption.
Control principle:
The unit switches to recovery mode using a dry contact supplied
by the user and connected to the CLIMATIC. CLIMATIC controller
regulates the water leaving temperature of the recovery exchanger
using temperature probes included at inlet and outlet of the
exchanger. It offers the possibility of programming schedule one
or more setpoints.
Recovery capacity is entirely dependent of the cooling needs.
The capacity step is important due to two independent refrigerant
circuits and varies depending on the number of compressor ;
Unit with 4 compressors
Cooling capacity step Heat recovery step
27% 27%
53% 27% or 53%
73% 53% or 73%
100% 53% or 100%
Unit with 6 compressors
Cooling capacity step Heat recovery step
17% 17%
33% 17% or 33%
50% 33% or 50%
67% 33% or 67%
83% 67% or 83%
100% 50% or 100%
CLIMATIC provides a dry contact to control the on/off of the
pump(s). It also delivers a 0 -10V signal to control a 3-way valve
to avoid cold start if the inlet water temperature is too low ensuring
the correct operation of the unit. The use of a 3-way valve can
be avoided by using a variable speed pump. This solution allows
for greater control of the output temperature of water and thus to
reduce the power consumption of the pump.
Protection against lack of water fl ow is provided by a paddle fl ow
switch included in the option.
Compared with the basic confi guration this option features one or two additional V free cooling coils at the back of the unit. The free
cooling includes two motorised valves, allowing the chilled water to run through the free-cooling coils, which uses less power and
utilises the lower ambient air to cool the water. The cooling capacity of one V free cooling coil at 0°C ambient is approximately 100 kW.
NEOSYS free cooling system is using the same fans and speed inverters as for the standard unit in order to keep the same acoustic
capabilities. The hydraulic module options are compatible with the Free Cooling option but glycol is of course required.
Typical free cooling applications can be facilities with cooling demand all along the year, such as offi ces with high internal loads like
computer rooms, data centers, etc. In the North and North-East part of Europe, the ambient temperature is below 5°C between 20
and 45% of the year that makes this option very attractive.
Control principle
The control principle is the following: if ambient Temperature < return Temperature – 3°C, motorised valves open to by-pass return
water fl ow through the Free Cooling coils. The Free Cooling fans are driven by the CLIMATIC 60 via a specifi c PID algorithm. The Free
cooling operation is considered as a cooling stage that has a priority on the compressor stages: only if the free cooling fan speed has
reached the maximum fan speed then the compressors are allowed to run with their own PID.
Advantages of the NEOSYS free cooling system
• Simultaneous compressor cooling capability to reach building needs in any conditions (vs. DX free cooling that can not operate
simultaneous compressor and free cooling).
• Design with additional V free cooling coils to eliminate unnecessary air pressure drop when running 100% in compressor cooling
mode thus reducing all along the year energy fan consumption (vs. traditional free cooling system with free cooling coils located in
series with the condensing coil.)
• Free cooling as soon as the air outside is cold enough (3°C below return water temperature).
• Reduce the running use of the compressors.
• Extend the life expectancy of the compressors.
• EER up to 63 (Water 15/10°C, Air -15°C).
• Reduce power costs.
• Payback could be as little as 12 months
Compressor
Evaporator
Air condensers
Free cooling coils
Water in
15°C
Water pump (option)
10°C
Water out
• 30 •
Application Guide / NEOSYS-AGU-1801-E
FREE COOLING
Example of free cooling:
Unit running 100% in free cooling mode:
Return water temperature: 12°C (30% glycol)
Number of "V"1V for NAC 200 to 5402V for NAC 200 to 540
Air fl owm
Water fl owm3/h
Ambient temperature°C
Outlet temperature°C
Free cooling capacitykW
Free cooling absorbed powerkW
EER
Free cooling pressure drop to be added to
evaporator pressure drop
kPa
Return water temperature: 15°C (30% glycol)
3
/h
3800076000
3672
-15-10-505-15-10-505
6,77,78,79,710,76,77,78,79,710,7
190153117824738030623416494
3,23,23,23,23,26,46,46,46,46,4
59483726155948372615
5762
Number of "V"1V for NAC 200 to 5402V for NAC 200 to 540
3
Air fl owm
Water fl owm
Ambient temperature°C
Outlet temperature°C
Free cooling capacitykW
Free cooling absorbed powerkW
EER
Free cooling pressure drop to be added to
evaporator pressure drop
/h
3
/h
3800076000
3672
-15-10-505-15-10-505
910,111,112,113,1910,111,112,113,1
21417714010469428354280208138
3,23,23,23,23,26,46,46,46,46,4
67554433226755443322
kPa
5762
Application Guide /NEOSYS-AGU-1801-E
• 31 •
ACOUSTIC DATA
IMPORTANT NOTE : Thanks to variable speed fans, maximum sound level can be reduced.
NEOSYS maximum air fl ow can be adjusted between 70 % and 100 % of the nominal airfl ow to meet
maximum sound level requirements.
Please contact LENNOX for noise level calculations at reduced airfl ow.
Values in grey cells : derating capacity, compressor(s) unload due to high discharge temperature
N/A : Pressure drop of derating capacity need to be calculed thanks to page 15
Pf :Pe :Wf :Dp :
Net cooling capacity in kWEffective absorbed power in cooling
mode
Application Guide /NEOSYS-AGU-1801-E
Water fl ow in m3 per hourWater pressure drop in KPa
• 39 •
PERFORMANCES
COOLING CAPACITIES
NAC
8 °C
1080
9 °C
Water outlet temperature
1080
10 °C
1080
Performance data are available up 52°C on request.
Values in grey cells : derating capacity, compressor(s) unload due to high discharge temperature
N/A : Pressure drop of derating capacity need to be calculed thanks to page 15
Pf :Pe :Wf :Dp :
Net cooling capacity in kWEffective absorbed power in cooling
mode
Application Guide /NEOSYS-AGU-1801-E
Water fl ow in m3 per hourWater pressure drop in KPa
Values in grey cells : derating capacity, compressor(s) unload due to high discharge temperature
N/A : Pressure drop of derating capacity need to be calculed thanks to page 15
Pf :Pe :Wf :Dp :
Net cooling capacity in kWEffective absorbed power in cooling
mode
• 42 •
Water fl ow in m3 per hourWater pressure drop in KPa
Application Guide / NEOSYS-AGU-1801-E
PERFORMANCES
COOLING CAPACITIES
NAC
11 °C
1080
12 °C
Water outlet temperature
1080
13 °C
1080
Performance data are available up 52°C on request.
Values in grey cells : derating capacity, compressor(s) unload due to high discharge temperature
N/A : Pressure drop of derating capacity need to be calculed thanks to page 15
Pf :Pe :Wf :Dp :
Net cooling capacity in kWEffective absorbed power in cooling
mode
• 44 •
Water fl ow in m3 per hourWater pressure drop in KPa
Values in grey cells : derating capacity, compressor(s) unload due to high discharge temperature
N/A : Pressure drop of derating capacity need to be calculed thanks to page 15
Pf :Pe :Wf :Dp :
Net cooling capacity in kWEffective absorbed power in cooling
mode
Application Guide /NEOSYS-AGU-1801-E
Water fl ow in m3 per hourWater pressure drop in KPa
Pf :Pe :Wf :Dp :
Net cooling capacity in kWEffective absorbed power in cooling
mode
Application Guide /NEOSYS-AGU-1801-E
Values in grey cells : derating capacity, compressor(s) unload due to high discharge temperature
N/A : Pressure drop of derating capacity need to be calculed thanks to page 15
Water fl ow in m3 per hourWater pressure drop in KPa
Pf :Pe :Wf :Dp :
Net cooling capacity in kWEffective absorbed power in cooling
mode
• 48 •
Values in grey cells : derating capacity, compressor(s) unload due to high discharge temperature
N/A : Pressure drop of derating capacity need to be calculed thanks to page 15
Water fl ow in m3 per hourWater pressure drop in KPa
Net heating capacity in kW - Instantaneaous heating
capacity (this does not take into account the formation of
frost on the coil and the defrost cycles.
• 50 •
Effective absorbed power in
heating mode
Water fl ow in m3 per hourWater pressure drop in KPa
Net heating capacity in kW Instantaneaous heating capacity (this
does not take into account the formation
of frost on the coil and the defrost
cycles.
Application Guide /NEOSYS-AGU-1801-E
Effective absorbed power in heating
mode
Water fl ow in m3 per hourWater pressure drop in KPa
• 51 •
DIMENSIONAL DATA
NAC 200 / 230 / 270
NAH 200 / 230
62 ±5 (In2)
277
±5 (In1)
56 ±5 (Out)
G1/->/G3
1393 ±5
3590 ±15
D2/G2
3085 ±5
In1
1393 ±5
In2
Out
800 ±5
1100 ±50
452 ±5
2280
±5
2025 ±15
D1/->/D3
±50150 ±5
1131
D3/G3
D1/G1
125 ±5
1000
1424 ±15
369 ±5
865 ±50
363 ±5
140 ±5
50
100
LEGEND:
:
In 1
:
In 2
Out :
6xØ20
Gravity center
Chilled water inlet - Unit without hydraulic module
Chilled water outlet
LOAD DITRIBUTION
(Kg - Lennox recommend load distribution as detailed below.)
More detailed load distributions available on page xxx
NAC 200
NAC 230
NAC 270
NAH 200
NAH 230
• 52 •
Without hydraulic module
With high pressure double pump
Without hydraulic module
With high pressure double pump
Without hydraulic module
With high pressure double pump
Without hydraulic module
With high pressure double pump
Without hydraulic module
With high pressure double pump
250 ±5
Ø
Ø 4" VictaulicChilled water inlet - Unit with hydraulic module
G1/D1G2/D2G3/D3G4/D4G5/G5
350428214--
396484242--
355434217--
414506253--
402491246--
463565283--
384469235-430526263-384469235-442541270--
Application Guide / NEOSYS-AGU-1801-E
DIMENSIONAL DATA
NAH 270
2280 15
(In2)62 5
4620 15
1000
In1
In2
(In1)277 5
(Out)56 5
G1/->/G4
2180 5
1112 50
8x 20
D1/->/D4
50
100
2025 15
Out
D4/G4
D3/G3
D2/G2
1270 51275 51270 5
4115 5
125 5452 5
D1/G1
150 5
800 5
1380 50
5
140
5
250
369 5
1790 15
50
860
365 5
LEGEND:
:
Gravity center
In 1
In 2
Out :
Chilled water inlet - Unit without hydraulic module
:
Chilled water outlet
LOAD DITRIBUTION
(Kg - Lennox recommend load distribution as detailed below.)
More detailed load distributions available on page xxx
NAH 270
Without hydraulic module
With high pressure double pump
Ø
Ø 4" VictaulicChilled water inlet - Unit with hydraulic module
G1/D1G2/D2G3/D3G4/D4G5/G5
3694813612420
4135374042710
Application Guide /NEOSYS-AGU-1801-E
• 53 •
36`5 (In2)
245`5 (In1)
30`5 (Out1)
23`5(Out2)
DIMENSIONAL DATA
2280`15
2025`15
4620`15
In2
NAC 300
NAH 300
1000
In1
Out1/Out2
1790`15
878`50
LEGEND:
:
In 1
:
In 2
Out :
G1/->/G4
1078`50
8x n 20
D1/->/D4
50
100
Gravity center
Chilled water inlet - Unit without hydraulic module
Chilled water outlet
D4/G4
D3/G3
4115`5
D2/G2
1270`51275`51270`5
1300`50
125`5
800`5
452`5
D1/G1
150`52180`5
365`5568`5
140`5
250`5
Ø
Ø 4" VictaulicChilled water inlet - Unit with hydraulic module
LOAD DITRIBUTION
(Kg - Lennox recommend load distribution as detailed below.)
More detailed load distributions available on page xxx
NAC 300
NAH 300
• 54 •
Without hydraulic module
With high pressure double pump
Without hydraulic module
With high pressure double pump
G1/D1G2/D2G3/D3G4/D4G5/G5
350436319223-
397495374253-
442551416282489609460312-
Application Guide / NEOSYS-AGU-1801-E
DIMENSIONAL DATA
2280`15
237`5 (In1)
137`5 (Out 1)
4620`15
NAC 340 / 380
NAH 340
1000
In1
248`5 (Out2)
245`5 (In2)
G1/->/G4
2025`15
284`5
In2
2180`51270`51275`51270`5150`5
1084`50
8x n 20
D1/->/D4
50
100
D4/G4
857`5
D3/G3
D2/G2
1475`50
4115`5
125`5182`5
800`5
D1/G1
Out1/
Out2
1222`15568`5
775`50
140`5
250`5
LEGEND:
:
Gravity center
In 1
In 2
Out 1 :
Out 2 :
Chilled water inlet - Unit without hydraulic module
Chilled water inlet - Unit with all hydraulic module
:
Chilled water outlet - Unit without hydraulic module / with variable water fl ow hydraulic module (eDrive)
Chilled water outlet - Unit with hydraulic module
LOAD DITRIBUTION
(Kg - Lennox recommend load distribution as detailed below.)
More detailed load distributions available on page xxx
NAC 340
NAC 380
NAH 340
Without hydraulic module
With high pressure double pump
Without hydraulic module
With high pressure double pump
Without hydraulic module
With high pressure double pump
Ø
Ø 5" Victaulic
G1/D1G2/D2G3/D3G4/D4G5/G5
370495381256-
417557428288-
375502386259-
422564433291-
413552424285459614472317-
Application Guide /NEOSYS-AGU-1801-E
• 55 •
DIMENSIONAL DATA
NAC 420 / 480
NAH 380 / 420 / 480
D3/G3
5650 15
5145 5
D2/G2
Out1/2
800 5
D1/G1
182 5
125 5
2280 15
(In1)264 5
(Out2)276 5
(Out1)164 5
(In2)281 5
G1/->/G4
1084 501715 50
D1/->/D4
8x 20
100
15
2025
288 5
D4/G4
50
In2
1887 15
1000
In1
5
568
15
1222
785 50
150 51615 51615 51615 52180 5
140 5
5
250
LEGEND:
:
Gravity center
In 1
In 2
Out 1 :
Out 2 :
Chilled water inlet - Unit without hydraulic module
Chilled water inlet - Unit with all hydraulic module
:
Chilled water outlet - Unit without hydraulic module / with variable water fl ow hydraulic module (eDrive)
Chilled water outlet - Unit with hydraulic module
LOAD DITRIBUTION
(Kg - Lennox recommend load distribution as detailed below.)
More detailed load distributions available on page xxx
Lennox recommends load distribution as detailed below
Without hydraulic module
With low pressure single pump
NAH 200
NAH 230
NAH 270
NAH 300
NAH 340
NAH 380
NAH 420
NAH 480
With low pressure double pump
With high pressure double pump
With high pressure double pump
Without hydraulic module
With low pressure single pump
With low pressure double pump
With high pressure double pump
With high pressure double pump
Without hydraulic module
With low pressure single pump
With low pressure double pump
With high pressure double pump
With high pressure double pump
Without hydraulic module
With low pressure single pump
With low pressure double pump
With high pressure double pump
With high pressure double pump
Without hydraulic module
With low pressure single pump
With low pressure double pump
With high pressure double pump
With high pressure double pump
Without hydraulic module
With low pressure single pump
With low pressure double pump
With high pressure double pump
With high pressure double pump
Without hydraulic module
With low pressure single pump
With low pressure double pump
With high pressure double pump
With high pressure double pump
Without hydraulic module
With low pressure single pump
With low pressure double pump
With high pressure double pump
With high pressure double pump
NAH
G1/D1G2/D2G3/D3G4/D4G5/G5
38446923500
42151425700
42652126100
42251625800
43052626300
38446923500
42151525700
42752226100
42852426200
44254127000
3694813612420
3975173882600
4025233932640
4025233932640
4135374042710
4425514162820
4715874433000
4775954493040
4775944493040
4896094603120
4135524242850
4425924553050
4486004613100
4485994603090
4596144723170
5106655003350
5457105343580
5557245443650
5467125353590
5587275473660
5166725063390
5517185403620
5617315503690
5527205413630
5667375543710
5266865163460
5617315503690
5727455603750
5637335513690
5767515653780
• 64 •
Application Guide / NEOSYS-AGU-1801-E
lennoxemea.com
+ 32 3 633 3045+351 229 066 050
+33 1 64 76 23 23+7 495 626 56 53
+49 (0) 211 950 79 600+34 915 401 810
+ 39 02 495 26 200+38 044 585 59 10
+ 31 332 471 800+44 1604 669 100
+48 22 58 48 610
LENNOX DISTRIBUTION
+33 4 72 23 20 20
Due to LENNOX EMEA ongoing commitment to quality, the specifi cations, ratings and dimensions are subject to
change without notice and without incurring liability.
Improper installation, adjustment, alteration, service or maintenance can cause property damage or personal injury.
Installation and service must be performed by a qualifi ed installer and servicing agency.
NEOSYS-AGU-1801-E
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