AERMEC NRL2000A User manual

INRLTY_14.09 4086982_03
EN
60Hz
Technical manual
NRL 200-360
CHILLER
REVERSIBLE HEAT PUMP
• EXTERNAL UNIT
• HIGH EFFICIENCY
• 
• POWER SUPPLY 60Hz
60Hz

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AERMEC S.p.A. reserves the right at all times to make any modification for the improvement of its product and is not obliged to add these modification to machines of
previous manufacture that have already been delivered or are being built.
Dear Customer,
Thank you for choosing AERMEC. It is the fruit of many years of experience and special design studies and has
been made of the highest grade materials and with cutting edge technology.
In addition, all our products bear the EC mark indicating that they meet the requirements of the European
Machine Directive regarding safety. The standard of quality is permanently being monitored and AERMEC
products are therefore a synonym for Safety, Quality and Reliability.
The data may undergo modifications considered necessary for the improvement of the product, at any time
and without the obligation for any notice thereof.
Thank you again.
AERMEC S.p.A

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INDEX
2. COMPONENTS AND CONFIGURATIONS ........................................ 5
1. DESCRIPTION AND CHOCE OF UNIT .............................................. 5
3. CONFIGURATOR............................................................................... 6
4. COOLING CIRQUIT........................................................................... 7
4.1. NRL ONLY COOLING ....................................................................... 7
4.2. COOLING CIRQUIT NRL HEAT PUMP.............................................. 8
5. DESCRIPTION OF COMPONENTS ................................................... 9
5.1. CHILLER CIRCUIT ............................................................................. 9
5.1.1. WATER FEATURES ............................................................................ 9
5.2. FRAME AND FANS ........................................................................... 9
5.3. HYDRAULIC CIRCUIT STANDARD COMPONENTS.......................... 9
5.4. HYDRAULIC COMPONENTS FOR CONFIGURABLE VERSIONS ...... 9
5.5. SAFETY AND CONTROL COMPONENTS ......................................... 9
5.6. ELECTRICAL PANEL CONTROL AND POWER.................................. 9
6. ACCESSORIES................................................................................. 11
6.1. MECHANICAL ACCESSORIES......................................................... 11
6.2. ELECTRICAL ACCESORIES ............................................................. 11
7. TECHNICAL DATA FOR VERSIONS "A" .......................................... 12
8. TECHNICAL DATA FOR VERSIONS "HA"........................................ 14
9. OPERATIONG LIMITS..................................................................... 16
9.1. OPERATIONG LIMITS IN COOLING MODE GRAPH ¹ .................... 16
9.2. OPERATIONG LIMITS IN HOT MODE GRAPH ¹............................. 16
9.3. PROJECT DATA ............................................................................... 16
9.4. INPUT POWER AND COOLING CAPACITY
"STANDARD VERSION"/ "HEAT PUMP IN COOLING MODE" ..... 17
10. CORRECTIVE FACTORS FOR WATER TEMPERATURES
DIFFERENT THAN THE NOMINAL WATER TEMPERATURE "°".... 18
10.1. RESE E ASSORBIMENTI DIVERSI DAL NOMINALE....................... 18
10.3. HEATING CAPACITY AND INPUT POWER..................................... 18
 ............................. 18
10.2. FOULING FACTORS ........................................................................ 18
11. PRESSURE DROPS.......................................................................... 19
11.1. SYSTEM SIDE TOTAL PRESSURE DROP "°" .................................. 19
11.2. SYSTEM SIDE TOTAL PRESSURE DROP "HA" IN COOLING MODE19
11.3. SYSTEM SIDE TOTAL PRESSURE DROP "HA" IN HEATING MODE19
12. USEFUL HEADS .............................................................................. 20
12.1. HIGH PUMP USEFUL HEADS "°"................................................. 20
12.2. HIGH PUMP USEFUL HEADS "HA"............................................. 20
12.3. LOW PUMP USEFUL HEADS "°"................................................... 21
12.4. LOW PUMP USEFUL HEADS "HA"............................................... 21
13. ETHYLENE GLYCOL SOLUTIONS.................................................... 22
12.5. HOW TO INTERPRET GLYCOL CURVES ......................................... 22
14. EXPANSION TANK CALIBRATION .................................................. 23
13.5.1. EXPANSION TANK CALIBRATION ................................................. 23
15. MINIMUM WATER CONTENT ....................................................... 23
18. PARTIALIZATIONS .......................................................................... 24
19. SOUND DATA.................................................................................. 25
20. SETTINGS PARAMETERS CONTROL AND SAFETY........................ 26

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Aermec cod. 14.09 4086982_03
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1. DESCRIPTION AND CHOCE OF UNIT
COMPONENTS VERSIONS
COOLING CIRCUIT ° H C D T

 yes yes no no no
 yes yes no yes yes
 no no no no yes
 no no no yes no
AIR SIDE EXCHANGE yes yes yes yes yes
COMPRESSOR yes yes yes yes yes
DEHYDRATOR FILTER yes yes yes yes yes
HIGH PRESSURE SWITCH yes yes yes yes yes
HIGH PRESSURE TRANSDUCER yes yes yes yes yes
LOW PRESSURE TRANSDUCER yes yes yes yes yes
LIQUID INDICATOR yes yes yes yes yes
LIQUID TANK no yes no no yes
 no yes no no yes
LIQUID SEPARATOR no yes no no yes
CYCLE REVERSE VALVE no yes no no yes
Chillers and heat pumps for outdoor condensed in the
air with R410A Series NRL have been designed and
manufactured to satisfy heating and cooling needs
and the production of domestic hot water (DHW) in
medium to small commercial or residential buildings.
Maximum reliability
The presence of several scroll compressors allows NRL
chillers various partialisations of the cooling capacity.
Models:
1. NRL "°" standard chiller
2. NRL "H" heat pump *
3. NRL "C" motocondensing
The versions can be in different set-ups at the same
time in order to satisfy a wide range of plant enginee-
ring solutions:
1. "A" HIGH EFFICIENCY
2. "E" SILENCED HIGH EFFICIENCY
3. "D" WITH DESUPERHEATER
4. "T" WITH TOTAL RECOVERY
* Possibility of production of D.H.W.
- only "I" version (fan speed modulating for condensation control).
- VMF

2. COMPONENTS AND CONFIGURATIONS
Standards and Directives respected on
designing and constructing the unit:
PROTECTION RATING
1. IP 24
ACOUSTIC PART:
1. ISO DIS 9614/2

2. 
3. SOUND PRESSURE (EN ISO 3744)
REFRIGERANT GAS:
This unit contains fluoride gases with
greenhouse effect covered by the
Kyoto Protocol. Maintenance and
disposal must only be performed by
qualified staff.
STANDARD:

Heating and cooling equipment.
ANSI/NFPA
Standard 70 National Electrical code
(N.E.C.).
CSA C.22.1.- C.22.2
Safety Standard Electrical Installation.

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3. CONFIGURATOR
Field
1, 2, 3 Code NRL
 Size 200, 225, 250, 280, 300, 330, 360
7 Compressors
0Compressors standard R410A
8 Thermostatic valve
°
Standard mechanical thermostatic valve with produced water up to 39,2°F / +4°C
Y Mechanical thermostatic valve with produced water from 39,2°F / +4°C to -42,8°F / -6°C
X Electronic thermostatic valve min. Water out temp 39,2°F / +4°C, (contact the factory for lower temperatures)
9 Model
°Cooling Only
HHeat pump
CMotorcondensing (data on the mand)
10 Heat recovery
°Without recovery
DWith Desuperheater
TWith Total recovery
11 Version
AHigh efficiency
EHigh efficiency, low noise (data on the mand)
12 Coils
°
Alluminium
R Copper
S Copper tin plated
V Epoxy coated
13 Fans
° Standard
I
14 Power supply
7460V ±10%-3-60Hz with thermomagnetic switches
8575V ±10%-3-60Hz with thermomagnetic switches
 Hydronic kit
00 Without hydronic kit
01 Tank and single low head pump
02 Tank and single low head pump and reserve pump
03 Tank and single high head pump
04 Tank and single high head pump and reserve pump
P1 Single low head pump
P2 Single low head pump and reserve pump
P3 Single high head pump
P4 Single high head pump and reserve pump

YD / YT / YH
HT / HC
CT / CD /
T01 / T02 / T03 / T04


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4. COOLING CIRQUIT
CN
TEV
IDL IDL
HPT HPS
LPT
CP CP
LPT
BHE
HPT HPS
TEV
F F
CN
KEY:
BHE PLATE HEAT EXCHANGER
CN AIR SIDE EXSCHANGE
CP
COMPRESSOR
FFILTER DRIER
HPS HIGH PRESSURE SWITCH
HPT HIGH PRESSURE TRANSDUCERS
IDL LIQUID INDICATOR
LPT LOW PRESSURE TRANSDUCER
4.1. NRL ONLY COOLING

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KEY:
AL
FLUID STORAGE TANK
BHE PLATE HEAT EXCHANGER
CN AIR SIDE EXCHANGE
CP
COMPRESSOR
CV 
FFILTER DRIER
HPS HIGH PRESSURE SWITCH
HPT HIGH PRESSURE TRANSDUCERS
IDL LIQUID INDICATOR
LPT LOW PRESSURE TRANSDUCERS
LS LIQUID SEPARATOR
VIC REVERSE CYCLE VALVE
4.2. COOLING CIRQUIT NRL HEAT PUMP
HPT HPS
LS
VIC VIC
LS
HPS
LPT LPT
HPT
BHE
IDL IDL
CP
CN
CV CV
CV
CV
CV
CN
TEV TEV
F
AL
F
CV
CV
AL
CP
CV

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 DESCRIPTION OF COMPONENTS
 CHILLER CIRCUIT
SCROLL COMPRESSORS
High efficiency scroll-type hermetic compressors, as-
sembled on elastic antivibration supports, driven by a
2-pole electric motor with internal thermal protection.
of the electric heater casing included as standard. The
heater is automatically powered when the unit stops,
provided that the unit is kept under tension.
WATER SIDE HEAT EXCHANGER
Of the plate-type (AISI 316), externally insulated with
closed cell material to reduce thermal dispersion.
Fitted, as standard, with antifreeze heater.
 WATER FEATURES
SOURCE SIDE HEAT EXCHANGER
Made with copper pipes and aluminium louvered fins
blocked by mechanical expansion of the pipes. Provi-
ded with protective grid.
DESUPERHEATER / TOTAL RECOVERY
Unit with (AISI 316) heat plate, insulated externally
with closed cell material to reduce heat loss.
CYCLE INVERSION VALVE

4way cycle inversion valve. Inverts the flow of refrige-
rant gas.
LIQUID STORAGE TANK

Compensates the difference in volume between louve-
res coil and plate exchanger, withholding excess liquid.
DEHYDRATOR FILTER
Hermetic-mechanical with cartridges made of ceramic
and hygroscopic material, able to withhold impurities
and any traces of humidity present in the cooling
circuit.

Allows the passage of the refrigerant in just one
direction.
MECHANICAL THERMOSTATIC VALVE
The mechanical valve, with external equaliser positio-
ned at the evaporator inlet, modulates the flow of gas
to the evaporator, according to the heat load, in order
to ensure a correct heating level of the intake gas.
SOLENOID VALVE
The valve closes when the compressor turns off,
preventing the flow of refrigerant gas towards the
evaporator.
INDICATOR FOR LIQUID PASSAGE WITH HUMIDITY
PRESENCE SIGNAL
Used to check the refrigerant gas load and the eventual
presence of humidity in the cooling circuit.
LIQUID AND PRESSING LINE TAPS

Allows interruption of the refrigerant in the case of
extraordinary maintenance.
LIQUID SEPARATOR

Located on the suction point of the compressor, to pro-
tect against any flowback of liquid refrigerant, flooded
start-ups, operation in the presence of liquid.
BY PASS SOLENOIDE VALVE

By-passes the thermostatic valve during the defrosting
cycle.
 FRAME AND FANS
SUPPORT FRAME
Load-bearing structure Made of hot-galvanised steel
sheet of a suitable thickness, varnished with polyester
powders able to resist atmospheric agents over time.
VENTILATION UNIT
Axial fan, balanced statically and dynamically. The elec-
tric fans are protected electrically by magnet-circuit
breakers and mechanically by anti-intrusion metal
grids, according to the IEC EN 60335-2-40 Standard.
 HYDRAULIC CIRCUIT STANDARD COM
PONENTS
FLOW SWITCH
It checks that there is circulation of water.If
this is not the case, it blocks the unit
WATER TEMPERATURE PROBE (IN-OUT)
AIR VENT
Of the automatic type, assembled on the upper part of
the hydraulic system; it releases any air bubbles that
may be present in the system.
DRAIN TAP
 HYDRAULIC COMPONENTS FOR CONFI
GURABLE VERSIONS
CIRCULATION PUMP

Depending on the characteristics of the pump chosen,
it offers a useful head to overcome the pressure drops
in the system.
EXPANSION TANK


With nitrogen pre-load membrane.
SAFETY VALVE
Equipped with a piped discharger and intervenes by
discharges the over pressure in case of anomalous
pressures.
STORAGE TANK
In order to reduce the thermal dispersion and elimina-
te the phenomenon of the formation of condensation,
it is insulated with polyurethane material of a suitable
thickness. It is required to reduce the number of peaks
of the compressor and to even the temperature of
water to be sent to the utilities.
STORAGE TANK DRAIN TAP
WATER FILTER
Equipped with steel filtering mesh; prevents the heat
exchangers from clogging.
 SAFETY AND CONTROL COMPONENTS

With fixed calibration, placed on high pressure side of
cooling circuit, inhibits functioning of compressor if
abnormal work pressure occurs.
HIGH PRESSURE TRANSDUCER
Placed on high pressure side of cooling circuit, signals
the work pressure to control board, generating a pre-
warning in case abnormal pressure occurs.
LOW PRESSURE TRANSDUCER
Allows displaying, on the microprocessor board display,
the value of the compressor's suction pressure (one
per circuit) on the low-pressure side of the cooling
circuit
SAFETY VALVE
Equipped with a piped discharger and intervenes by
discharges the over pressure in case of anomalous
pressures.
- Set at 45 bar on the branch HP
- Set at 30 bar on the branch LP
LOW PRESSURE SWITCH
 ELECTRICAL PANEL CONTROL AND
POWER
Electric board in compliance with standards EN 60204-
1/IEC 204-1, complete with:
- door lock main isolating switch,
- fuses and contactors for compressors and fans,
- terminals for REMOTE PANEL,
- spring type control circuit terminal board,
- outdoor electric board with double door and
gaskets,
PH 6-8
Electric
conductivity
less than 200 mV/cm
(77°F / 25°C)
Chloride ions less than 50 ppm
Sulphuric acid ions less than 50 ppm
Total iron less than 0.3 ppm
Alkalinity M less than 50 ppm
Total hardness less than 50 ppm
Sulphur ions none
ammonia ions none
Silicone ions less than 30 ppm

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- electronic controller,
- evaporator pump and recovery pump control
consent relay
- all numbered cables.

IT is possible to access the electrical panel by discon-
necting the voltage, then using the opening lever of
the panel itself. This lever can be blocked with one or
more padlocks during maintenance, in order to prevent
the machine being powered up accidentally.

This allows the chiller command operations to
be given from a distance. compressor protection ther-
momagnetic switch; fan protection thermomagnetic
switch; auxiliary protection thermomagnetic switch;
discharge gas temperature control thermostat
CONTROL KEYPAD
Provides full control functions. For a detailed
description refer to the user manual.
ELECTRONIC REGULATION
GR3
with proportional-integral algorithm: maintains
average output temperature at value set
• Self-adapting differential switch: guarantees
• minimum functioning times of the compressor in systems with
low water content.
• Intelligent defrosting for pressure reduction:
• allows to determine when the coil is effectively defrosted, avoi-
ding useless defrosting
• Set-point compensation with external temperature (with external
air probe accessory): reduces energy consumption
• Condensation check based on the pressure rather than on
temperature for absolute stability (with DCPX revs. adjuster
accessory )
• Inverse condensation check for the heat pump functioning mode
also in summer (with DCPX revs. adjuster accessory)
• Pre-alarms with automatic reset: in the case of alarm, a certain
number of restarts are allowed before the definitive
• block
• 
blocked cycle reversing valve
• Compressor functioning hours count.
• Compressor peak count.
• Historical alarms
• Autostart after voltage drop.
• Local or remote control
Display of the start of the unit:
a.Voltage presence
b. compressor ON/OFF
c. functioning mode (hot/cold)
d. alarm active
Probes, transducers and parameters
display
a. Water outlet
b. water inlet
c. Coil temperature (heat pumps)
d. Pressing gas temperature
e. External air temperature (heat pumps,
cooling only with DCPX and probe)
f. Pressure delivery (heat pumps)
g.Intake pressure (heat pumps)
h. Temperature error (sum of the proportional and integral
error)
i. Stand-by times for start-up/switch-off of the compressor
Alarms management:
a. Low pressure
b. High pressure (primary alarm: switch directly blocks supply to com-
pressor)
c. High discharge temperature
d. Anti-freeze


blocking.


For further information please refer to user manual.

11Aermec cod. 14.09 4086982_03
NRL 2000-3600 60Hz
EN
6. ACCESSORIES
6.1. MECHANICAL ACCESSORIES
AVX
Sprung anti-vibration supports. Select the AVX model
from the compatibility table.
GP
Protection grille, protects the external coil from
accidental knocks.
6.2. ELECTRICAL ACCESORIES
AERWEB300
Accessory AERWEB allows remote control of a chiller
through a common PC and an ethernet connection
over a common browser; 4 versions available:
- AERWEB300-6: Web server to monitor and remote
control max. 6 units in RS485 network;
- AERWEB300-18: Web server to monitor and remote
control max. 18 units in RS485 network;
AERWEB300-6G: Web server to monitor and remote
control max. 6 units in RS485 network with integrated
GPRS modem;
AERWEB300-18G: Web server to monitor and remote
control max. 18 units in RS485 network with integra-
ted GPRS modem;

RS-485 interface for supervision systems with
MODBUS protocol.
DRE
It allows the reduction of peak power necessary for
the machine during start-up phase.
Accessories can only be fitted in the factory.
DUALCHILLER
Simplified control system to switch on and off, and
command, two chillers (using Aermec GR3 command)
in a single system, as if they were a single unit.
MULTICHILLER
Control system to switch the individual chillers on
and off, and command them, in a system in which
several units are installed in parallel, always ensuring a
constant delivery to the evaporators.
PGS: Daily/Weekly Programmer.
Allows you to programme two time bands per day
(two switch on/off cycles) and to have differentiated
programming for each day of the week.
PRM1-PRM2 FACTORY FITTED ACCESSORY. It is a
manual pressure switch electrically wired in series
with the existing automatic high pressure switch on
the compressor discharge pipe.
Model NRL2000HA   NRL2800HA NRL3000HA NRL3300HA NRL3600HA
00 AVX 7015 AVX 7017 AVX 7019 AVX 7019 AVX 7019 AVX 798 AVX 798
P2 / P4 AVX 7015 AVX 7017 AVX 7021 AVX 7021 AVX 7021 AVX 800 AVX 800
P1 / P3 AVX 7015 AVX 7017 AVX 7021 AVX 7021 AVX 7021 AVX 800 AVX 800
02 / 04 AVX 7016 AVX 7018 AVX 7020 AVX 7020 AVX 7020 AVX 799 AVX 799
01 / 03 AVX 7016 AVX 7018 AVX 7020 AVX 7020 AVX 7020 AVX 799 AVX 799
Model NRL2000A   NRL2800A NRL3000A NRL3300A NRL3600A
00 AVX 767 AVX 7022 AVX 7024 AVX 7027 AVX 7027 AVX 798 AVX 798
P2 / P4 AVX 769 AVX 7022 AVX 7026 AVX 7029 AVX 7029 AVX 800 AVX 800
P1 / P3 AVX 769 AVX 7022 AVX 7026 AVX 7029 AVX 7029 AVX 800 AVX 800
02 / 04 AVX 768 AVX 7023 AVX 7025 AVX 7028 AVX 7028 AVX 799 AVX 799
01 / 03 AVX 768 AVX 7023 AVX 7025 AVX 7028 AVX 7028 AVX 799 AVX 799
NRL 2000   2800 3000 3300 3600
Solo freddo 2 x GP260 GP260 + GP500 2 x GP500 2 x GP500 2 x GP500 2 x GP500 2 x GP500
Pompa di calore 2 x GP350 GP350 + GP500 2 x GP500 2 x GP500 2 x GP500 2 x GP500 2 x GP500

12 Aermec cod. 14.09 4086982_03
NRL 2000-3600 60Hz
EN
7. TECHNICAL DATA FOR VERSIONS "A"
Model 2000   2800 3000 3300 3600
Cooling capacity Tons 145 166 188 204 220 241 261
Total power input kW 178,80 204,80 230,80 247,20 263,00 305,12 347,09
Total power input with LOW - PUMP kW 184,80 210,80 236,80 255,20 271,00 316,12 358,09
Total power input with HIGH - PUMP 460V kW 189,80 215,80 241,80 262,20 278,00 327,12 369,09
Water flow rate 460V gpm 346 398 450 490 529 578 626
Total pressure drops p.s.i. 5 6 6 6 7 8 9
Useful static pressur with LOW - PUMP p.s.i. 20 17 15 21 18 15 12
Useful static pressur with HIGH - PUMP p.s.i. 36 32 30 36 32 39 36
ENERGY INDICES
EER BTU/Wat 9,71 9,75 9,78 9,93 10,07 9,49 9,04
IPLV BTU/Wat 13,66 13,59 13,66 13,90 14,04 13,59 12,94
PROTECTION RATING
IP 24 24 24 24 24 24 24
DESUPERHEATER
Heating power recovered BTU/h 607.361 697.101 787.181 858.836 928.103 1.011.359 1.094.956
Water flow gmp 134.8 154.72 174.71 190.61 205.98 224.46 243.02
Pressure drop psi 1.16 1.74 1.74 2.03 1.89 2.32 2.47
Q.ty nr. 4 4 4 4 4 4 4
Defrost electric heater nr. / W 4 / 40 4 / 40 4 / 40 4 / 40 4 / 40 4 / 40 4 / 40
Water content l 2,3/2,3/2,3/2,3 2,6/2,6/2,3/2,3 2,6/2,6/2,6/2,6 2,6/3,3/2,6/3,3 3,3/3,3/3,3/3,3 3,3/3,8/3,3/3,8 3,8/3,8/3,8/3,8
Water connections inch 2" 2" 2" 2" 2" 2" 2"
ELECTRICAL DATA
Total input current 460V A 273.00 319.30 365.7 387.40 408.40 472.60 537.40
575V A 218.80 258.20 297.60 313.10 328.20 381.60 435.40
TOTAL RECOVERY
Cooling capacity Alls ton 127.08 146.14 165.19 179.79 193.94 211.90 229.83
Total power input Alls kW 182.70 203.00 233.30 241.70 259.40 306.60 353.60
Heating power recovered Alls BTU/h 2.117.234 2.411.702 2.706.170 2.940.925 3.168.174 3.536.685 3.904.174
Water flow Alls gpm 469.9 535.26 600.61 652.71 703.15 784.93 866.49
Pressure drop Alls psi 14.07 14. 13.49 13.05 13.20 13.49 14.21
Q.ty Alls n° 2 2 2 2 2 2 2
Defrost electric heater Alls nr. / W 4 / 150 4 / 150 4 / 150 4 / 150 4 / 150 4 / 150 4 / 150
Water content Alls l 24 / 24 28 / 24 28 / 28 32 / 32 35 / 35 39 / 39 43 / 43
Water connections Alls inch 3" 3" 3" 3" 3" 3" 3"
COMPRESSORS SCROLL
Number / circuit n°/n° 8/4 8/4 8/4 8/4 8/4 10/4 12/4
HEAT EXCHANGER SYSTEM SIDE
Exchanger capacity gal 2 x 7,0 7,0 + 8,0 2 x 8,0 2 x 8,7 2 x 8,7 2 x 8,7 2 x 8,7
hydraulic connections (victaulic) Ø 3" 3"/4" 4" 4" 4" 4" 4"
HYDRONIC KIT
STORAGE TANK
Storage tank n°/gal 2 x 184.92 2 x 184.92 2 x 184.92 2 x 184.92 2 x 184.92 2 x 184.92 2 x 184.92
EXPANSION TANK
Expansion tank n°/gal 4 x 25 4 x 25 4 x 25 4 x 25 4 x 25 4 x 25 4 x 25
Calibration expansion tank p.s.i. 21 21 21 21 21 21 21
LOW HEAD PUMP
Input power 460V kW 6,00 6,00 6,00 8,00 8,00 11,00 11,00
575V kW 6,00 6,00 6,00 8,00 8,00 11,00 11,00
Pump current input 460V A 9,88 9,88 9,88 12,46 12,46 16,86 16,86
575V A 7,90 7,90 7,90 9,96 9,96 13,48 13,48
HIGH HEAD PUMP
Potenza assorbita kW 11,00 11,00 11,00 15,00 15,00 22,00 22,00
Pump current input 460V A 16,86 16,86 16,86 22,96 22,96 33,38 33,38
575V A 13,48 13,48 13,48 18,38 18,38 26,70 26,70
SAFETY VALVE
Safety valve calibration psi 87 87 87 87 87 87 87
FANS
Number n° 8 12 16 16 16 16 16
Air flow rate cfm 95344 143960 192576 189272 185968 185968 185968
Input power 460V A 30,4 45,6 60,8 60,8 60,8 60,8 60,8
575V A 26,6 39,8 53,1 53,1 53,1 53,1 53,1
Input current 460V kW 16,0 24,0 32,0 32,0 32,0 32,0 32,0
575V kW 17,4 26,2 34,9 34,9 34,9 34,9 34,9

Sound pressure dB(A)
60 63 65 66 67 67 67
Sound power dB(A) 92 95 97 98 99 99 99
COOLING (AHRI CONDITIONS)
Outlet water temperature 6,7°C / 44,6°F
Flow rate 0,043 l/s kW
  
DATA REFERED NO PUMP VERSION
DESUPERHEATER/ TOTAL RECOVERY
 
 
(3) HEATING (AHRI CONDITIONS)
Inlet water temperature 40°C / 104°F
 
External air temperature 7°C b.s / 6°C b.u.
AHRI conditions
leaving water 6.7°C/44.6°F
flow rate 0.043 l/s per kW (full load)
Load 100% air 35°C /95°F
Load 75% air 26.7°C/80.06°F
Load 50% air 18.3°C /64.94°F
Load 25% air 12.8°C/55.04°F

13Aermec cod. 14.09 4086982_03
NRL 2000-3600 60Hz
EN
Model 2000   2800 3000 3300 3600
Oli
C1 kg / lb 9,4 / 20,72 9,4 / 20,72 13,6 / 29,98 13,6 / 29,98 12,6 / 27,78 12,6 / 27,78 20,4 / 44,97
C2 kg / lb 9,4 / 20,72 9,4 / 20,72 13,6 / 29,98 12,2 / 44,97 12,6 / 27,78 20,4 / 44,97 20,4 / 44,97
C3 kg / lb 9,4 / 20,72 13,6 / 29,98 13,6 / 29,98 13,6 / 29,98 12,6 / 27,78 12,6 / 27,78 20,4 / 44,97
C4 kg / lb 9,4 / 20,72 13,6 / 29,98 13,6 / 29,98 12,2 / 44.97 12,6 / 27,78 20,4 / 44,97 20,4 / 44.97

Height mm 2450 2450 2450 2450 2450 2450 2450
in 96 96 96 96 96 96 96
Width mm 2200 2200 2200 2200 2200 2200 2200
in 87 87 87 87 87 87 87
Depth mm 6400 8750 11100 11100 11100 11100 11100
in 252 344 437 437 437 437 437
Weight kg 4480 5600 6700 6940 7160 7370 7700
lb 9878 12348 14774 15303 15788 16251 16979
Refrigerant R410A
C1 kg / lb 35 / 77,16 35 / 77,16 55 / 121,25 55 / 121,25 73 / 160,94 73 / 160,94 73 / 160,94
C2 kg / lb 35 / 77,16 35 / 77,16 55 / 121,25 73 / 160,94 73 / 160,94 73 / 160,94 73 / 160,94
C3 kg / lb 35 / 77,16 55 / 121,25 55 / 121,25 55 / 121,25 73 / 160,94 73 / 160,94 73 / 160,94
C4 kg / lb 35 / 77,16 55 / 121,25 55 / 121,25 73 / 160,94 73 / 160,94 73 / 160,94 73 / 160,94

(1) SOUND POWER
Aermec determines the sound power value
on the basis of measurements taken in
accordance with standard 9614-2,

Sound pressure in an unrestricted range on



MODELS WITHOUT PUMP "A" ON/OFF FAN
L.R.A. 460V A 475,54 572,16 635,06 710,75 761,01 794,60 802,75
575V A 384,47 486,13 541,33 586,17 644,63 655,66 680,30
M.C.A. 460V A 288,60 352,57 415,47 468,86 519,12 552,71 583,16
575V A 235,24 291,56 346,75 408,87 467,33 478,36 485,73
M.O.P. 460V A 319,05 394,49 457,39 523,35 573,61 607,20 625,08
575V A 259,85 326,31 381,50 458,23 516,69 527,72 520,47
RECOM FUSE 460V A 300 350 450 500 500 600 600
575V A 250 300 350 450 500 500 500
MODELS WITH LOW HEAD PUMP
L.R.A. 460V A 485,54 582,16 645,06 723,95 774,21 813,00 821,15
575V A 392,47 494,13 549,33 596,73 655,19 670,38 695,02
M.C.A. 460V A 298,60 362,57 425,47 482,06 532,32 571,11 601,56
575V A 243,24 299,56 354,75 419,43 477,89 493,08 500,45
M.O.P. 460V A 298,60 362,57 425,47 482,06 532,32 571,11 601,56
575V A 267,85 334,31 389,50 468,79 527,25 542,44 535,19
RECOM FUSE 460V A 300 400 450 500 500 600 600
575V A 250 300 350 450 500 500 500
MODELS WITH HIGH PRESSURE PUMP
L.R.A. 460V A 493,94 590,56 653,46 732,75 783,01 829,20 837,35
575V A 399,19 500,85 556,05 603,77 662,23 683,34 707,98
M.C.A. 460V A 307,00 370,97 433,87 490,86 541,12 587,31 617,76
575V A 249,96 306,28 361,47 426,47 484,93 506,04 513,41
M.O.P. 460V A 337,45 412,89 475,79 545,35 595,61 641,80 659,68
575V A 274,57 341,03 396,22 475,83 534,29 555,40 548,15
RECOM FUSE 460V A 300 400 450 500 500 600 600
575V A 250 300 350 450 500 500 500
MODELS WITHOUT PUMP "A" "I" EC INVERTER FAN
L.R.A. 460V A 476,34 573,36 636,66 712,35 762,61 796,20 804,35
575V A 382,87 483,73 538,13 582,97 641,43 652,46 677,10
M.C.A. 460V A 289,40 353,77 417,07 470,46 520,72 554,31 584,76
575V A 233,64 289,16 343,55 405,67 464,13 475,16 482,53
M.O.P. 460V A 319,85 395,69 458,99 524,95 575,21 608,80 626,68
575V A 258,25 323,91 378,30 455,03 513,49 524,52 517,27
RECOM FUSE 460V A 300 350 450 500 500 600 600
575V A 250 300 350 450 500 500 500
MODELS WITH LOW HEAD PUMP
L.R.A. 460V A 486,34 583,36 646,66 725,55 775,81 814,60 822,75
575V A 390,87 491,73 546,13 593,53 651,99 667,18 691,82
M.C.A. 460V A 299,40 363,77 427,07 483,66 533,92 572,71 603,16
575V A 241,64 297,16 351,55 416,23 474,69 489,88 497,25
M.O.P. 460V A 329,85 405,69 468,99 538,15 588,41 627,20 645,08
575V A 266,25 331,91 386,30 465,59 524,05 539,24 531,99
RECOM FUSE 460V A 300 400 450 500 500 600 600
575V A 250 300 350 450 500 500 500
MODELS WITH HIGH PRESSURE PUMP
L.R.A. 460V A 494,74 591,76 655,06 734,35 784,61 830,80 838,95
575V A 397,59 498,45 552,85 600,57 659,03 680,14 704,78
M.C.A. 460V A 307,80 372,17 435,47 492,46 542,72 588,91 619,36
575V A 248,36 303,88 358,27 423,27 481,73 502,84 510,21
M.O.P. 460V A 338,25 414,09 477,39 546,95 597,21 643,40 661,28
575V A 272,97 338,63 393,02 472,63 531,09 552,20 544,95
RECOM FUSE 460V A 300 400 450 500 500 600 600
575V A 250 300 350 450 500 500 500

14 Aermec cod. 14.09 4086982_03
NRL 2000-3600 60Hz
EN
Model 2000   2800 3000 3300 3600
Cooling capacity Tons 141.55 162.53 183.52 197.05 211.16 226.24 245.62
Total power input kW 174.00 199.10 224.20 242.80 261.80 303.98 346.65
Total power input with LOW PUMP kW 180.00 205.10 230.20 250.80 269.80 314.98 357.65
Total power input with HIGH - PUMP kW 185.00 210.10 235.20 257.80 276.80 325.98 368.65
Water flow rate gpm 339 390 440 472 507 542 589
Total pressure drops p.s.i. 7 5 5 5 5 6 7
Useful static with LOW - PUMP p.s.i. 18 18 16 22 20 19 16
Useful static with HIGH - PUMP p.s.i. 34 33 31 38 35 42 40
Heating capacity 1.771.379 2.004.292 2.237.205 2.427.670 2.621.412 3.055.095 3.401.018
Total power input kW 179.42 206.40 233.38 253.82 268.94 314.82 346.80
Total power input
with LOW PUMP kW 185.42 212.40 239.38 261.82 276.94 325.82 357.80
Total power input with HIGH PUMP kW 190.42 217.40 244.38 268.82 283.94 336.82 368.80
Water flow rate gpm 393 445 497 539 582 678 775
Total pressure drops p.s.i. 9 6 6 7 7 10 12
Useful static with LOW - PUMP p.s.i. 14 14 12 17 14 9 3
Useful static with HIGH - PUMP p.s.i. 30 29 26 31 27 34 29
ENERGY INDICES
EER BTU/Watt 9,77 9,81 9,83 9,75 9,71 8,94 8,51
COP Watt /Watt 2.89 2.85 2.81 2.82 2.86 2.84 2.87
IPLV BTU/Watt 13,75 13,70 13,74 13,61 13,52 13,32 12,94
PROTECTION RATING
IP 24 24 24 24 24 24 24
DESUPERHEATER
Heating power recovered BTU/h 595.419 682.428 769.097 827.786 889.887 1.029.102 1.029.102
Water flow gpm 123.15 151.46 170.69 183.72 197.5 228.4 228.4
Pressure drop psi 1.16 1.60 1.60 1.89 1.74 2.218 2.18
Q.ty nr. 4 4 4 4 4 4 4
Defrost electric heater nr. / W 4 / 40 4 / 40 4 / 40 4 / 40 4 / 40 4 / 40 4 / 40
Water content l 2,3/2,3/2,3/2,3 2,6/2,6/2,3/2,3 2,6/2,6/2,6/2,6 2,6/3,3/2,6/3,3 3,3/3,3/3,3/3,3 3,3/3,8/3,3/3,8 3,8/3,8/3,8/3,8
Water connections inch 2" 2" 2" 2" 2" 2" 2"
ELECTRICAL DATA
Total input current (cooling mode) 460V A 273,1 316,1 359,0 383,7 408,9 473,2 537,9
575V A 220,0 256,3 292,6 310,1 328,5 382,0 435,8
Total input current (heating mode) 460V A 286,5 318,0 349,4 393,6 428,8 514,8 552,7
575V A 229,2 254,4 279,6 315,0 343,2 433,9 461,1
COMPRESSORS SCROLL
Number / circuit n°/n° 8/4 8/4 8/4 8/4 8/4 10/4 12/4
EXCHANGER SYSTEM SIDE
Exchanger capacity gal 2 x 7,0 7,0 + 8,7 2 x 8,7 2 x 8,7 2 x 9,9 2 x 9,9 2 x 9,9
hydraulic connections (victaulic) Ø 3" 3"/4" * 4" 4" 4" 4" 4"
HYDRONIC KIT
STORAGE TANK
Storage tank capacity n°/gal 2 x 184.92 2 x 184.92 2 x 184.92 2 x 184.92 2 x 184.92 2 x 184.92 2 x 184.92
EXPANSION TANK
Expansion tank n°/gal 4 x 6.60 4 x 6.60 4 x 6.60 4 x 6.60 4 x 6.60 4 x 6.60 4 x 6.60
Calibration expansion tank p.s.i 21 21 21 21 21 21 21
LOW HEAD PUMP
Input power 460V kW 6 6 6 8 8 11 11
575V kW 6 6 6 8 8 11,00 11,00
Pump current input 460V A 9,88 9,88 9,88 12,46 12,46 16,86 16,86
575V A 7,90 7,90 7,90 9,96 9,96 13,48 13,48
HIGH HEAD PUMP
Input power 460V kW 11 11 11 15 15 22 22
575V kW 11 11 11 15 15 22,00 22,00
Pump current input 460V A 16,86 16,86 16,86 22,96 22,96 33,38 33,38
575V A 13,48 13,48 13,48 18,38 18,38 26,70 26,70
SAFETY VALVE
Safety valve psi 87 87 87 87 87 87 87
FUNS
Number n° 12 14 16 16 16 16 16
Air flow rate cfm 147264 173224 199184 199184 199184 198240 195408
Input power 460V A 45,6 53,2 60,8 60,8 60,8 60,8 60,8
575V A 13,48 13.48 13,48 18,38 18,38 26,70 26,70
Input current 460V kW 24,0 28,0 32,0 32,0 32,0 32,0 32,0
575V kW 26,16 30,52 34,88 34,88 34,88 32,0 32,0
SOUND DATA COOLING MODE
Sound pressure dB(A) 96 96 97 98 99 99 99
Sound power dB(A) 64 64 65 66 67 67 67
8. TECHNICAL DATA FOR VERSIONS "HA"
COOLING (AHRI CONDITIONS)
Outlet water temperature 6,7°C / 44,6°F
Flow rate 0,043 l/s kW
  
DATA REFERED NO PUMP VERSION
DESUPERHEATER/ TOTAL RECOVERY
 
 
(3) HEATING (AHRI CONDITIONS)
Inlet water temperature 40°C / 104°F
 
External air temperature 7°C b.s / 6°C b.u.
AHRI conditions
leaving water 6.7°C/44.6°F
flow rate 0.043 l/s per kW (full load)
Load 100% air 35°C /95°F
Load 75% air 26.7°C/80.06°F
Load 50% air 18.3°C /64.94°F
Load 25% air 12.8°C/55.04°F

Aermec cod. 14.09 4086982_03
NRL 2000-3600 60Hz
EN
Model 2000   2800 3000 3300 3600
HEATING MODE
Sound pressure dB(A) 96 96 97 98 99 99 99
Sound power dB(A) 64 64 65 66 67 67 67
Oli
C1 kg / lb 9,4 / 20,72 9,4 / 20,72 13,6 / 29,98 13,6 / 29,98 12,6 / 27,78 12,6 / 27,78 20,4 / 44,97
C2 kg / lb 9,4 / 20,72 9,4 / 20,72 13,6 / 29,98 12,2 / 44,97 12,6 / 27,78 20,4 / 44,97 20,4 / 44,97
C3 kg / lb 9,4 / 20,72 13,6 / 29,98 13,6 / 29,98 13,6 / 29,98 12,6 / 27,78 12,6 / 27,78 20,4 / 44,97
C4 kg / lb 9,4 / 20,72 13,6 / 29,98 13,6 / 29,98 12,2 / 44.97 12,6 / 27,78 20,4 / 44,97 20,4 / 44.97

Height mm 2450 2450 2450 2450 2450 2450 2450
in 96 96 96 96 96 96 96
Width mm 2200 2200 2200 2200 2200 2200 2200
in 87 87 87 87 87 87 87
Depth mm 8100 9600 11100 11100 11100 11100 11100
in 319 378 437 437 437 437 437
Weight kg 5650 6530 7400 7440 7440 7720 8050
lb 12458 14399 16317 16405 16405 17023 17750
Refrigerant R410A
C1 kg / lb 56 /123,46 56 /123,46 82/180,78 82/180,78 85/187,39 85/187,39 85/187,39
C2 kg / lb 56 /123,46 56 /123,46 82/180,78 82/180,78 85/187,39 85/187,39 85/187,39
C3 kg / lb 56 /123,46 82/180,78 82/180,78 82/180,78 85/187,39 85/187,39 85/187,39
C4 kg / lb 56 /123,46 82/180,78 82/180,78 82/180,78 85/187,39 85/187,39 85/187,39

(1) SOUND POWER
Aermec determines the sound power value
on the basis of measurements taken in
accordance with standard 9614-2,

Sound pressure in an unrestricted range on



MODELS WITHOUT PUMP "HA" ON/OFF FAN
L.R.A. 460V A 490,74 579,76 635,06 710,75 761,01 794,60 802,75
575V A 397,75 492,77 541,33 586,17 644,63 655,66 680,30
M.C.A. 460V A 303,80 360,17 415,47 468,86 519,12 552,71 583,16
575V A 248,52 298,20 346,75 408,87 467,33 478,36 485,73
M.O.P. 460V A 334,25 402,09 457,39 523,35 573,61 607,20 625,08
575V A 273,13 332,95 381,50 458,23 516,69 527,72 520,47
RECOM FUSE 460V A 300 400 450 500 500 600 600
575V A 250 300 350 450 500 500 500
MODELS WITH LOW HEAD PUMP
L.R.A. 460V A 500,74 589,76 645,06 723,95 774,21 813,00 821,15
575V A 405,75 500,77 549,33 596,73 655,19 670,38 695,02
M.C.A. 460V A 313,80 370,17 425,47 482,06 532,32 571,11 601,56
575V A 256,52 306,20 354,75 419,43 477,89 493,08 500,45
M.O.P. 460V A 344,25 412,09 467,39 536,55 586,81 625,60 643,48
575V A 281,13 340,95 389,50 468,79 527,25 542,44 535,19
RECOM FUSE 460V A 300 400 450 500 500 600 600
575V A 250 300 350 450 500 500 500
MODELS WITH HIGH PRESSURE PUMP
L.R.A. 460V A 509,14 598,16 653,46 732,75 783,01 829,20 837,35
575V A 412,47 507,49 556,05 603,77 662,23 683,34 707,98
M.C.A. 460V A 322,20 378,57 433,87 490,86 541,12 587,31 617,76
575V A 263,24 312,92 361,47 426,47 484,93 506,04 513,41
M.O.P. 460V A 352,65 420,49 475,79 545,35 595,61 641,80 659,68
575V A 287,85 347,67 396,22 475,83 534,29 555,40 548,15
RECOM FUSE 460V A 350 400 450 500 500 600 600
575V A 250 300 350 450 500 500 500
MODELS WITHOUT PUMP "HA" "I" EC INVERTER FAN
L.R.A. 460V A 491,94 581,16 636,66 712,35 762,61 796,20 804,35
575V A 395,35 489,97 538,13 582,97 641,43 652,46 677,10
M.C.A. 460V A 305,00 361,57 417,07 470,46 520,72 554,31 584,76
575V A 246,12 295,40 343,55 405,67 464,13 475,16 482,53
M.O.P. 460V A 335,45 403,49 458,99 524,95 575,21 608,80 626,68
575V A 270,73 330,15 378,30 455,03 513,49 524,52 517,27
RECOM FUSE 460V A 300 400 450 500 500 600 600
575V A 250 300 350 450 500 500 500
MODELS WITH LOW HEAD PUMP
L.R.A. 460V A 501,94 591,16 646,66 725,55 775,81 814,60 822,75
575V A 403,35 497,97 546,13 593,53 651,99 667,18 691,82
M.C.A. 460V A 315,00 371,57 427,07 483,66 533,92 572,71 603,16
575V A 254,12 303,40 351,55 416,23 474,69 489,88 497,25
M.O.P. 460V A 345,45 413,49 468,99 538,15 588,41 627,20 645,08
575V A 278,73 338,15 386,30 465,59 524,05 539,24 531,99
RECOM FUSE 460V A 300 400 450 500 500 600 600
575V A 250 300 350 450 500 500 500
MODELS WITH HIGH PRESSURE PUMP
L.R.A. 460V A 510,34 599,56 655,06 734,35 784,61 830,80 838,95
575V A 410,07 504,69 552,85 600,57 659,03 680,14 704,78
M.C.A. 460V A 323,40 379,97 435,47 492,46 542,72 588,91 619,36
575V A 260,84 310,12 358,27 423,27 481,73 502,84 510,21
M.O.P. 460V A 353,85 421,89 477,39 546,95 597,21 643,40 661,28
575V A 285,45 344,87 393,02 472,63 531,09 552,20 544,95
RECOM FUSE 460V A 350 400 450 500 500 600 600
575V A 250 300 350 450 500 500 500

16 Aermec cod. 14.09 4086982_03
NRL 2000-3600 60Hz
EN
9. OPERATIONG LIMITS
Note:
1 N8 In summer mode the unit can be started
with external air 46°C/ 114.8°F and water
inlet 35°C/95°F. In winter mode the unit can
be started with external air -15°C/5 °F and
water inlet 10°C/50°F. Operate in such condi-




three-way valve that allows bypassing water

that allow the unit to work within the permit-

9.1. OPERATIONG LIMITS IN COOLING MODE GRAPH ¹
The units, in standard configuration, are not su-
itable for installation in salty environments. For
functioning limits, please refer to the diagrams
below, valid for AHRI standard conditions.
Wind breaks should be implemented if the
unit is installed in particularly windy areas, to
prevent a malfunction of the unit.
9.2. OPERATIONG LIMITS IN HOT MODE GRAPH ¹
External air temperature b.s.
Water temperature produced EVAPORATOR
 


External air temperature b.s.
Water temperature produced CONDENSER
9.3. PROJECT DATA ATTENTION
Contact our technical sales
department if the unit needs to
operated outside the operating
limits
ATTENTION
If the unit is installed in particu-
larly windy areas, we recommend
providing for windbreak to avoid
malfunctioning of the DCPX_UL
device.
25
20
15
30
35
40
45
50
55
60
-10-15-20 -5 0 5 10 15 20 25 30 35 40 45 50
°C
°C
°F
°F
145-4 23 32 41 50 59
59
68
68
77
77
86
86
95
95
104
104
113
113
122
122
131
140
42 °C
107,6 °F
-3 °C
26,6 °F
55 °C 131 °F
STANDARD
functioning
Functioning
with DCPX
(accessory)
REFRIGERANT SIDE High pressure
side
Low pressure
side
Acceptable maximum pressure bar/PSI 45/653 30/435
Acceptable maximum temperature °C / °F 120 / 248 51 / 131
Acceptable minimum temperature °C / °F -30 /- 22 -30 / -22
WATER SIDE
Acceptable maximum pressure bar/PSI 6/87
Hydarulic circuit safety valve
(only in version with storage tank or with pump)
Calibrated at 6/87 bar/PSI and with piped discharge, which intervents
by discharging overpressure if abnormal work pressure occur.
5
14
23
32
41
50
59
68
77
86
95
104
113 114,8 °F
46 °C
36 °C
96,8 °F
122
-15
-10
-5
0
5
10
15
20
25
30
35
40
45
50
°C
°C
°F
°F
-6 -7 -8 -5 -4 -3 -2 -1
0 1 2 3 4 5 6 7 8 9
10 11 12 13 14 15 16 17 18 19 20
17,6 19,4 21,2 23,0 24,8 26,6 28,4 30,2 32,0 33,8 35,6 37,4 39,2 41,0 42,8 44,6 46,4 48,2 50,0 51,8 53,6 55,4 57,2 59,0 60,8 62,6 64,4 66,2 68,0
STANDARD
functioning
Functioning only with "I" funs
Functioning with
glycoled water
Functioning only with "I"
funs +
water glycoled

17Aermec cod. 14.09 4086982_03
NRL 2000-3600 60Hz
EN
Outside air temperature b.s. b.s. °C/ °F Outside air temperature b.s. °C/ °F
CORRECTION COEFFICIENTS (Ca) CORRECTION COEFFICIENTS (Cf)
0,6
0,7
0,8
0,9
1
1,1
1,2
1,3
1,4
-4-6 -2 0 2 4 6 8 10 12 14 16
18
40°C / 104°F
45°C / 113 °F
46°C / 114.8 °F
35°C / 95°F
30°C /
86°F
25°C / 77°F
20°C / 68°F
39.2
21.2
28.4 32.0 35.6 39.2 42.8 46.4 50 53.6 57.2 60.8 64.4
°C
°F
0,4
0,5
0,6
0,7
0,8
0,9
1
1,1
1,2
1,3
1,4
1,5
1,6
-6 -4 -2 0 2 4 6 8 10 12 14 16 18
39.2
21.2
28.4 32.0 35.6 39.2 42.8 46.4 50 53.6 57.2 60.8 64.4
°C
20°C / 68°F
25°C / 77°F
30°C / 86°F
35°C / 95°F
40°C 104°F
45°C 113 °F
46°C 114.8 °F
°F
9.4. INPUT POWER AND COOLING CAPACITY
"STANDARD VERSION"/ "HEAT PUMP VER
SION IN COOLING MODE"
The cooling capacity efficiency and electrical input power
in conditions differing from normal conditions are obtained
by multiplying the nominal values (Pf, Pa) by the respective
corrective co-efficients (Cf, Ca).
The following diagrams show how to obtain corrective co-
efficients to use for units in their various versions in cooling
mode; external air temperature, to which reference is made,
is shown in correspondence to each curve.
KEY:
Cf: Corrective coefficient of the
cooling capacity.
Ca: Corrective coefficient of the
input power.
INPUT POWER IN COOLING MODE CORRECTIVE COEFFICIENTS
COOLING CAPACITY CORRECTIVE COEFFICIENTS
WATER PRODUCTED
WATER PRODUCTED



use Tab. 11.3.1. to obtain the correction factors of the
cooling capacity and input power. In order to consider
exchanger dirtying, use the relative dirtying factors
Tab.11.4.1.

18 Aermec cod. 14.09 4086982_03
NRL 2000-3600 60Hz
EN
10. CORRECTIVE FACTORS FOR WATER TEMPERATURES DIFFERENT THAN THE NOMINAL WATER TEMPERATURE "°" VERSION
10.1. RESE E ASSORBIMENTI DIVERSI DAL NOMINALE
 
The performances given by the technical data refer
to AHRI standard conditions: flow rate 0.043l/s per

Use table to obtain the corrective factors of the

10.01°F / 5.56°C.
10.2. FOULING FACTORS
The performance levels given by the technical data
refer to conditions with clean tubes, with a fouling
factor = 1.
For other fouling factor values, multiply the data of
performance table by the coefficients given.


  8°C/14,40°F 10°C/18°F
Cooling capacity correction factors 0,99 11,02 1,03
Input power correction factors 0,99 11,01 1,02
FOULING FACTOR [K*M2]/[KW] [K*m2]/[W]  0,0001 0,0002
Cooling capacity correction factors 10,98 0,94
Input power correction factors 10,98 0,95
10.3. HEATING CAPACITY AND INPUT
POWER
"HEAT PUMP VERSIONS"
The heating capacity efficiency and electrical
input power in conditions differing from normal
conditions are obtained by multiplying the nomi-
nal values (Pt, Pa) by the respective coefficient
correctives (Ct, Ca).
The following diagram shows how to obtain cor-
rective coefficients; the produced hot water tem-
perature, to which reference is made, is shown in
correspondence to each curve, assuming a water
temperature difference equal to 5°C between the
condenser inlet and outlet.
The yields are intended net of de-frosting cycles.
KEY:
Ca: Corrective co-efficient of the
input power.
Ct: Corrective co-efficient of the
heating capacity.



use Tab. 11.3.1. to obtain the correction factors of the
cooling capacity and input power. In order to consider
exchanger dirtying, use the relative dirtying factors
Tab.11.4.1.
Ca cooling mode
-15 -12 -9 -6 -3 0 3 69 12 15 18 21 24 27 30 °C
5 10 -15,8 21,2 26,6 32 37,4 42,8 48,2 53,6 59 64,4 69,8 75,2 80,6 86 °F
7
44,6
77
86
95
104
113
131
°F
122
0.5
0.6
0.7
0.8
0.9
1.1
1.2
1.3
1.0
25
30
35
40
45
55
°C
50
Ct
0.5
0.6
0.7
0.8
0.9
1.1
1.2
1.3
1.4
-15 -12 -9 -6 -3 0 3 69 12
25
°C °F
30
35
40
45
55
50
77
86
95
104
113
131
122
15 18 21 24 27 30 °C
5 10 -15,8 21,2 26,6 32 37,4 42,8 48,2 53,6 59 64,4 69,8 75,2 80,6 86 °F
1.0
7
44,6
External air temperature (°C)



19Aermec cod. 14.09 4086982_03
NRL 2000-3600 60Hz
EN
The heating capacity that can be obtained from the
desuperheater is found by multiplying the nominal
value (Pd), by a relative co-efficient (Cd).
The following diagrams allow to obtain corrective
co-efficients to use for chillers in their various versions;
external air temperature, to which reference is made,
is shown in correspondence to each curve.
In heat pump models the desuperheater must be
shut-off in heat pump mode, or the warranty will be
come void..
PRESSURE DROPS
The NRL models with desuperheater have 2 desu-
perheaters for all sizes (positioned in parallel).
NOTE
Desuperheater features and pressure drop curves are
shown below.
For temperature values of produced water, different
from 50°C, multiply the result by the corrective factor.
Nominal value referring to:
Air temperature 35°C/95°F
Water at the desuperheater 45/50°C 113/122 °F
   
Units with Desuperheater (D) do not envision the
following versions:
YD
XD (only for temperature under 4°C/39.2°F)
45°C
40°C
35°C
30°C
25°C
0.00
35 40 45 50 55 60 65
0.50
1.00
1.50
2.00
2.50
3.00
20°C 68°F
95 100 105 110 115 12 0 12 5 13 0 13 5 14 0 14 5 149
113°F
104°F
95°F
86°F
77°F

Corrective co-efficients Cd
DESUPERHEATER CORRECTIVE COEFFICIENTS
11. DESUPERHEATER
DESUPERHEATER PRESSURE DROP
Average water temperature°C 30 40 50 60 70
Average water temperature °F 86 104 122 140 158
Multiplicative co-efficients 1.04 1.02 1 0.98 0.96
psi kPa
l/h
gmp
Pressure drop
Water flow rate
0 50 100 150 200 250 300 350 400 440
0
1
2
3
4
5
6
7
8
9
0
10
20
30
40
50
60
0 10000 20000 30000 40000 50000 60000 70000 80000 90000 100000
1
2
4
3
5
6
7
1 NRL 2000
2 NRL 2250
3 NRL 2500
4 NRL 2800
5 NRL 3000
6 NRL 3300
7 NRL 3600

20 Aermec cod. 14.09 4086982_03
NRL 2000-3600 60Hz
EN
1 NRL 800
2 NRL 900
3 NRL 1000
4 NRL 1250
5 NRL 1400
6 NRL 1500
7 NRL 1650
8 NRL 1800
12. TOTAL RECOVERY
In the case of functioning with total heat reco-
very, machine performance does not depend on
the external air temperature, but on that of the
hot water produced: the electric input power and
the recovery heating capacity are obtained by
multiplying the values (Pa, Pr) by the respective
corrective co-efficients (Ca, Cr), deductible from
the following diagrams.
The temperature of the hot water produced is
given in correspondence with each curve, to
which reference is made, assuming a difference
of 5°C/41°F between inlet and outlet from the
total recuperator.
The cooling capacity (Pf) is obtained from the
distance between the recovery heating capacity
(Pr) and input power (Pa).
Nominal value referring to:
Air temperature 35°C / 95°F
Water at the desuperheater 50°C / 122°F
   
Units with Total Recovery (T) do not envision the fol-
lowing versions:
YT
XT (only for temperature under 4°C/39,2°F)
35°C / 95°F
40°C / 104°F
45°C / 113°F
50°C / 122°F
55°C / 131°F
5
0,9
1,0
1,1
1,2
1,3
1,4
1,5
6 7 8 9 10 11 12 13 14 15 16 17 18 °C
64,4 °F4141 43 45 47 49 51 53 55 57 59 61 63
Temperature of the water produced
RECOVERED HEATING CAPACITY CORRECTIVE CO-EFFICIENTS
Cr
35°C / 95°F
40°C / 104°F
45°C / 113°F
50°C / 122°F
55°C / 131°F
5
0,7
0,8
0,9
1,0
1,1
1,2
6 7 8 9 10 11 12 13 14 15 16 17 18
64,4 °F
°C
4141 43 45 47 49 51 53 55 57 59 61 63
INPUT POWER WITH RECOVERY CORRECTIVE CO-EFFICIENTS
Ca
Temperature of the water produced
12.1. PRESSURE DROPS
The NRL models with total recovery always have
1 recuperator.
The features of the recuperators and the pressure
drop curves are given below; filter losses are not
considered.
The pressure drops in the diagram are relative to
an average temperature of 50°C / 122°F.
Shows the corrections to apply to pressure drops
on variation of the average water temperature.
TOTAL RECOVERY PRESSURE DROPS
Pressure drop
Water flow rate
l/h
gmp
psi kPa
0 200 400 600 800 1000 1200 1400 1541
0
20
40
60
80
100
120
140
160
180
200
0 50000 100000 150000 200000 250000 300000 350000
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
1 2
3 4 5 6
7