AERMEC NRA Series User manual

TECHNICAL MANUAL
Air/water chillers and heat pumps and condensing units with scroll
compressors
nra
INRATV. 0705 4034403_02
replace il 4034403_01 del 0607
ESPAÑOL pag.42 ENGLISH pag.2
MANUAL TÉCNICO
Enfriadoras y bombas de calor aire agua y motocondensadores con
compresores scroll

INSTRUCTIONS FOR THE SELECTION
Compliance declaration........................................................................................................................................................................................................... 1
1General standards............................................................................................................................................................................................pag. 2
2Description and choice of unit .....................................................................................................................................................................pag. 3
2.1 Models available .........................................................................................................................................................................pag. 3
2.2 Versions available ......................................................................................................................................................................pag. 3
2.2.1 Standard equipment.................................................................................................................................................................pag. 3
2.3 Configurator.................................................................................................................................................................................pag. 4
3Description of components...........................................................................................................................................................................pag. 5
3.1 Refrigerating circuit..................................................................................................................................................................pag. 5
3.2 Frame and fans...........................................................................................................................................................................pag. 5
3.3 Hydraulic components.............................................................................................................................................................pag. 5
3.4 Safety and control components ..........................................................................................................................................pag. 6
3.5 Electrical components .............................................................................................................................................................pag. 6
4Accessories and table of possible combinations ................................................................................................................................pag. 7
5Technical data
5.2 Standard versions .....................................................................................................................................................................pag. 9
5.3 High efficiency versions...........................................................................................................................................................pag. 10
5.4 Silenced versions .......................................................................................................................................................................pag. 11
5.5 Heat pump versions..................................................................................................................................................................pag. 12
5.6 Silenced heat pump versions................................................................................................................................................pag. 13
6Selection criteria
6.1 Operating limits...........................................................................................................................................................................pag. 14
6.2 Project data..................................................................................................................................................................................pag. 14
7Correction coefficients
7.1 Cooling input capacities, standard versions - high efficiency (cold mode)
high efficiency ..............................................................................................................................................................................pag. 15
7. 2 Cooling capacity, silenced versions ....................................................................................................................................pag. 16
7. 3 Heating and input capacities, heat pump versions .....................................................................................................pag. 17
7. 4 Correction factors for ∆T other than nominal .............................................................................................................pag. 17
7. 5 Fouling factors ............................................................................................................................................................................pag. 17
8Ethylene glycol solution ...................................................................................................................................................................................pag. 18
9Pressure drops..................................................................................................................................................................................................pag. 20
10 Accumulation.......................................................................................................................................................................................................pag. 21
11 Effective pressures for the system...........................................................................................................................................................pag. 22
12 Desuperheaters.................................................................................................................................................................................................pag. 23
13 Total heat recovery...........................................................................................................................................................................................pag. 25
14 Sound data ...........................................................................................................................................................................................................pag. 26
15 Capacity contro ..................................................................................................................................................................................................pag. 27
16 Calibration of check and safety parameters.........................................................................................................................................pag. 28
17 Dimensions...........................................................................................................................................................................................................pag. 29
18 Weights and centres of mass .....................................................................................................................................................................pag. 30
18.1 Distribution weights percentage on rests for models WITHOUT WATER........................................................pag. 31
18.2 Distribution weights percentage on rests for models WITH WATER ...............................................................pag. 36
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

1
AERMEC S.p.A.
I-37040 Bevilacqua (VR) Italia – Via Roma, 44
Tel. [phone]
Telefax 0442 93730 – ([phone]
www.aermec.com - [e-mail]
MODEL:
SERIAL NUMBER
COMPLIANCE DECLARATION We, the undersigned, declare on our own exclusive responsibility that the object in question, so
defined:
Product identification AIR / WATER chiller, HEAT PUMP NRA RANGE
is in compliance with:
1. Directive 97/23/EC and has been subjected (with reference to Attachment II of the said
directive) to the following compliance evaluation procedure:
module H
with checks made via inspections by the appointed body CEC via Pisacane 46 Legnano (MI)
- Itally, identity number 1131;
2. Designed, produced and marketed in observance of the following technical specifications:
Harmonised standards:
- EN 378: Refrigerating system and heat pumps - Safety and environmental
requirements;
- EN 12735: Copper and copper alloys - Seamless, round copper tubes for air
conditioning and refrigeration;
- UNI 1285-68: Calculation of the strength of metal pipes subject to internal pressure;
3. Designed, produced and marketed in observance of the following EC directives:
98/37/EC: Machine Directive
2006/95/CE LVD
Bevilacqua 26/03/2007
Marketing Director
Signature
NRA
NRA H

2
1 GENERAL STANDARDS
• This manual, and the electrical
layouts supplied with the unit, must
be kept in a dry place for any future
consultation, and for the lifespan of
the machine.
This manual has been drawn up
with the aim of supporting the
correct installation of the unit and
providing all the indications for the
correct use and maintenance of
the device. Before proceeding with
the installation, please read all the
information in the manual carefully,
as well as the procedures necessary
for the correct installation and use of
the unit.
•Becarefultoadheretotheinstructions
in this manual and observe the safety
regulations currently in place.
• The device must be installed in
compliance with the local legislation
currently in force in the country of
destination.
• Non-authorised tampering with
the equipment, whether electrical
or mechanical, will make THE
WARRANTY VOID and exclude any
liability on the part of the company.
• Check the electrical characteristics
shown on the registration plate
(fig.1) before making the electrical
connections. Read the instructions in
the specific section about electrical
connections.
• If the unit needs to be repaired, in all
cases contact a specialised AERMEC
After Sales Service centre and only
use OEM spare parts.
• The manufacturer furthermore
declines any liability for injury to
persons or damage to things
resulting from the failure to comply
with the information in this manual.
• Permitted uses: this series of chillers
is suitable for producing cold water
to use in hydronic systems designed
for air conditioning. The units are not
suitable for producing hot water for
bathrooms.
Any use other than that permitted,
or outside the operating limits
mentioned in this manual, is forbidden
unless previously agreed with the
company.
The warranty does not include
payment for damage due to wrong
installation of the unit by the
installer.
• The warranty does not include
payment for damage due to the
improper use of the unit by the user.
• The manufacturer is not to be
considered liable for accidents to
the user or the installer due to the
incorrect installation or improper
use of the unit.
•The device must be installed in such a
way that maintenance and/or repair
operations can be carried out. The
warranty of the device does not in any
case cover costs incurred as a result
of motorised ladders, scaffolding or
any other lifting systems necessary
to carry out the operations under
warranty.
The warranty is not valid when:
• the services and repairs have
been carried out by non-authorised
personnel or companies;
• the unit has been repaired or
modified in the past with non-OEM
spare parts;
• the unit has not been adequately
maintained;
• the instructions described in this
manual have not been followed;
• non-authorised modifications have
been made.
N.B:
The Manufacturer 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.
The warranty conditions are anyway
subject to the general sales conditions
at the moment the contract is
finalised.
Fig. 1
1.1 Technical plate
Technical
plate

3
2 DESCRIZIONE E SCELTA DELL'UNITÀ
The devices of the NRA range are
units used to produce cold water for
technological systems; the heat pump
models also allow you to produce hot
water for heating. They consist of two
R407C refrigerating circuits and a
single hydraulic circuit (which may or
may not be fitted with an accumulation
unit).
The presence of more than one scroll
type compressor allows the NRA chillers
various capacity controls of the cooling
capacity.
The use of more than one scroll type
compressor allows a high level of
efficiency, even with partial loads. In
these cases in fact, a variable number
of scroll compressors are working,
each at 100% (i.e. maximum efficiency)
of the output power. By means of
a microprocessor, the electronic
regulation controls and manages
all the components and working
parameters of the unit; an internal
memory registers the working
conditions in the moment when an
alarm condition arises, in order to
visualise it on the display. The units
have a protection rating of IP 24.
2.1 MODELS AVAILABLE
- “STANDARD COOLING ONLY (°)”
maximum outside temperature
allowed 42°C. Acoustic protection
cover for the compressor, for quiet
operation.
- “HEAT PUMP (H)” in cooling mode
the operating limits arrive to a
maximum outside air temperature
of 46°C. NRAH do not envisage the
following configurations:
- YH (with processed water lower
than 4°C)
- HC (condensing heat pump)
- HA (heat pump in high
temperature because the heat
pump is, by its very nature, a
machine for high temperatures)
2.2 VERSIONS AVAILABLE
- "STANDARD/BASE"
Maximum outside temperature
allowed 42°C, acoustic cover for the
compressor, for quieter operation.
- "HIGH TEMPERATURE" (available
only for cold working versions)
via the expansion of the pack finned
heat exchanger, it allows you to
widen the operating limits, arriving at
a maximum outside air temperature
of 46°C.
- “SILENCED (L)” r e pr e s ents the
models designed for particularly
quiet operation. All the sizes
are fitted with a device for
regulating the fan speed. When
the temperature is lower than
35°C, the low noise version
further reduces the number of fan
rotations, thereby obtaining an
even quieter operation than that in
nominal conditions.
- “SILENCED HEAT PUMPS (HL)”
represents the models designed for
particularly quiet operation.
All the sizes are fitted with a device
for regulating the fan speed.
- “HEAT RECOVERY”
A unit with air condensation, complete
with section for partial heat recovery.
The heat exchanger is specially scaled
to guarantee heat recovery for the
production of hot water for use in
bathrooms or other purposes.
1. Desuperheater (D)
The desuperheater is also available for
heat pump versions, limitedly in the coo-
ling function. It must be intercepted in
the heating function.
2. Total heat recovery (T)
In heat pumps total recovery is only
available for the “OO versions without
hydronic kit”
- “CONDENSING UNITS C”
-
“SILENCED CONDENSING UNITS
LC”
- “VERSION Y” is the version that allows
you to produce chilled water below
the standard value of +4°C, to a
minimum of -6°C.
For lower values, contact the
company headquarters.
ONLY THE VERSION YA IS
AVAILABLE.
WARNING
Forthedevicesdesigned to work with a
low air temperature, and also the heat
pumps, before starting up the unit (or
at the end of each period of prolonged
disuse) it is extremely important for
the oil of the compressor carter to
be heated beforehand, via the power
supply to the special heaters, for at
least 8 hours.
The carter heater is automatically
powered when the unit stops, provided
that the unit is kept under tension.
ALL THE VERSIONS COME WITH:
1. Evaporator anti-freeze heater
2. Compressor carter heater
3. Remote control panel
4. Water filter (supplied with the ver-
sions without accumulation)
5. Flow switch only in the versions with
accumulation
HEAT PUMPS
TP1 Trasduttore di bassa pressione
TP2 Trasduttore di alta pressione
DCPX Dispositivo di regolazione della ve-
locità dei ventilatori di serie per la
sola versione HL
CHILLERS WITH ACCUMULATION
1. Evaporator anti-freeze heater
2. High or low pressure pumping unit
3. OPTION: There is also the possibility
to have a reserve pump.
The stand-by pump that in NRA 800
- 900 - 1000 models is controlled by
the electronic card which enables
the alternate operation of the two
pumps to optimize the working time.
A switch on the NRA 1250 - 1400
- 1500 - 1650 - 1800 electric panel
enables the pumps to be manually
switched over.
4. For the heat pump versions, an
accumulation (pre-set for the
insertion of integrative heaters) is
available upon request.
CHILLERS WITH DESUPERHEATER
DCPX Standard
2.2.1 Standard equipment

4
2.3 SELECTION
NRA 1650 ° ° D L ° ° ° 00
0800 - 0900 - 1000 - 1250 - 1400 - 1500 - 1650 - 1800
Refrigerant
°Standard
YVersion for low temperature of processed water, down to -6°C
Model
°Cooling only
HHeat pump
Heat recoverers
°Without recoverers
DDesuperheater
TTotal recovery
Version
°Standard
AHigh temperature
LStandard in Silenced operation
Coils
°- Aluminium
R- Copper
S- Tinned copper
V - Varnished aluminium copper
Evaporator
°According to PED standards
CCondensing (without evap.)
Power supply
°3~400V-50Hz with thermomagnetic switches
43~230V-50Hz with thermomagnetic switches
93~500V-50Hz with thermomagnetic switches
1,2,3 4,5,6,7 8 9 10 11 12 13 14 15,16
HYDRONIC KIT
00 Without accumulation
01 Accumulation and low pressure pump
02 Accumulation, low pressure pump and
reserve pump
03 Accumulation and high pressure pump
04 Accumulation, high pressure pump and reserve
pump
05 Accumulation with holes for integrative
resistance, and low pressure pump
06 Accumulation with holes for integrative resistance,
low pressure pump and reserve pump
07 Accumulation with holes for integrative
resistance, high pressure pump
08 Accumulation with holes for integrative resistance,
high pressure pump and reserve pump
P1 Only low pressure pump
P2 Low pressure pump and reserve pump
P3 Only high pressure pump
P4 High pressure pump and reserve pump
fields 4 - 5 - 6 - 7
fields 8
fields 9
fields 10
fields 11
fields 12
fields 13
fields 14
fields 15 - 16

5
3 DESCRIPTION OF COMPONENTS
Esempio NRA 1650 00
KEY
1 Compressor
2 Exchanger water side
3 Exchanger air side
4 Frame
5 Control keypad
6 Fans
7 Electric panel
3.1 REFRIGERATING CIRCUIT
Compressors
Hermetic scroll type compressors
equipped, as standard, with anti-freeze
heater.
The heater is automatically powered when
the unit stops, provided that the unit is
kept under tension. The compressor area
is acoustically insulated. The use of more
than one scroll type compressor allows a
high level of efficiency with partial loads. In
these cases in fact, a variable number of
scroll compressors are working, each at
its own 100% (i.e. maximum efficiency) of
the output power.
Air side heat exchanger
It is made of copper pipes and aluminium
fins locked into place through mechanical
expansion of the pipes. Of the high efficiency
type; furrowed tube and corrugated fins for
heat pump, smooth tube and turbo fins for
cooling only.
Water side heat exchanger
Of the plate type (AISI 316), externally
insulated with closed cell material to
reduce thermal dispersion. Fitted, as
standard, with anti-freeze heater.
Liquid separator
(heat pump only)
Suction from compressor, to protect from
any liquid refrigerant return, flooded starts,
working in the presence of liquid.
Filter drier
Of the mechanical type, made of ceramic
and hygroscopic material, able to hold back
any impurities and traces of humidity in the
refrigerating circuit.
Sight glass
For checking the refrigerating gas load and
any humidity in the refrigerating circuit.
Thermostatic valve
The mechanical valve, with outside equali-
ser on the evaporator outlet, modulates the
gas flow to the evaporator on the basis of
the thermal load, in such a way as to ensu-
re the proper degree of overheating of the
intake gas.
Liquid and force gas taps
(cooling-only versions)
They allow the refrigerant to be cut off
during extraordinary maintenance.
Solenoid valve
The valve closes when the compressor
turns off, preventing the flow of refrigerant
gas towards the evaporator.
Reverse cycle valve
(heat pump only)
Inverts the flow of the refrigerant when
there is a change of summer / winter
operation and during the defrosting cycles.
One-way valve
This allows the refrigerant to flow in just
one direction.
Desuperheater (only upon request)
Of the plate type (AISI 316), externally
insulated with closed cell material to reduce
thermal dispersion.
The desuperheater is also available for heat
pump versions, limitedly in the cooling func-
tion. It must be intercepted in the heating
function.
Total recovery (only upon request)
Of the plate type (AISI 316), externally
insulated with closed cell material to reduce
thermal dispersion.
NOTE
In heat pumps total recovery is only available
for the “OO versions without hydronic kit”
Liquid accumulation
only for heat pumps, or with total heat
recovery.
It is used in the heat pump or total recovery
versions. Used to keep the refrigerating
gas in a liquid state if the machine, in that
particular working point, has an excess
of it.
3.2 FRAME AND FANS
Fan unit
Screw type, statically and dynamically
balanced. The electric fans are protected
electrically with thermomagnetic switches
and mechanically with metal anti-intrusion
grilles, in accordance with the standard CEI
EN 60335-2-40.
Load-bearing structure
Made of hot-galvanised steel sheet of a
suitable thickness, varnished with polyester
powders able to resist atmospheric agents
over time.
3.3 HYDRAULIC COMPONENTS
Circulation pump
Depending on the characteristics of the
pump chosen, it offers an effective pressure
to overcome the pressure drops in the
system. There is also the possibility to have
a reserve pump.
The stand-by pump that in NRA 800
- 900 - 1000 models is controlled by

6
the electronic card which enables the
alternate operation of the two pumps
to optimize the working time. A switch
on the NRA 1250 - 1400 - 1500 - 1650
- 1800 electric panel enables the pumps
to be manually switched over.
Flow switch only in versions with accumu-
lation feature and or pumps
This checks that the water is circulating. If
this is not the case, it shuts down the unit..
NOTE
In the versions without accumulation a flow
switch must be introduced or the WAR-
RANTY becomes void.
Water filter Supplied with standard ver-
sions (Mounted in versions with accumu-
lation and/or Pope)
Allows you to block and eliminate any
impurities in the hydraulic circuits. Inside, it
has a filtering mesh with holes not greater
than one millimetre. It is essential in order
to avoid serious damage to the plate heat
exchanger.
Accumulation tank
It is made of stainless steel, with a capacity
of 700 litres. In order to reduce the thermal
dispersion and eliminate the phenomenon of
the formation of condensation, it is insulated
with polyurethane material of a suitable
thickness. It is fitted, as standard, with an
anti-freeze heater (down to -20°C outside
temperature, tank water temperature
5°C), commanded by the anti-freeze probe
situated in the tank.
Drain valve
(only in the versions with hydronic unit or
pump(s))
Of the manual type, it discharges any air
pockets. It is intercepted by a stopcock so
that it can be substituted if necessary.
Filling unit
(only in the versions with accumulation or
pump(s))
This has a pressure gauge showing the
pressure in the system.
Two expansion tanks (of 25 litres)
(only in the versions with accumulation or
pump(s))
of the membrane type, with nitrogen pre-
charge.
Hydraulic circuit safety valve
(only in the versions with hydronic unit or
pump(s))
CALIBRATED AT 6 bar and with a discharge
that can be channelled, it intervenes by
discharging the overpressure in the event
of anomalous pressures.
3.4 SAFETY AND CONTROL
COMPONENTS
Low pressure switch
not present in the heat pump versions, as
these functions are carried out directly by
the board.
Of fixed calibration, located on the low
pressure side of the refrigerating circuit, it
stops the operation of the compressor in
the event of anomalous work pressures.
High pressure switch
Of variable calibration, located on the high
pressure side of the refrigerating circuit, it
stops the operation of the compressor in
the event of anomalous work pressures.
Anti-freeze heater
(installed as standard)
Its operation is commanded by the anti-
freeze probe located in the plate evaporator.
It is activated when the water temperature
is +3°C, and deactivated when the water
temperature is +5°C. The dedicated
software in the regulation card manages
the heater.
Refrigerating circuit safety valve
Calibrated at 30 Bar, it cuts in by letting off
the overpressure in the case of anomalous
pressures.
Low pressure transducers TP1,
standard in the heat pumps.
accessory in the cooling only versions
High pressure transducer TP2
standard on all the versions
3.5 ELECTRICAL COMPONENTS
Electrical panel
Contains the power section and the
management of the controls and safety
devices. This conforms with standard
CEI 60204-1, and Electromagnetic
Compatibility Directives EMC 89/336/
EEC and 92/31/EEC.
Door lock sectioner
IT IS POSSIBLE TO ACCESS THE ELECTRIC
PANEL BY disconnecting 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.
Control keypad
Provides full control functions.
For a detailed description of the keypad
refer to the user manual.
Remote control panel
This allows the chiller command operations
to be given from a distance.
- thermomagnetic compressor
protection.
- thermomagnetic fan protection;
- thermomagnetic auxiliary protection.
- thermostat for discharge gas
temperature control
3.6 ELECTRONIC REGULATION
Microprocessor card
Consisting of a management/control card and a
visualisation card. Functions carried out:
• regulation of evaporator water inlet
temperature (also outlet can be
selected), with thermostat action up
to 12 levels and proportional/integral
control of fan speed.
• delayed compressor start-up.
• operation as chiller, with possibility to
integrate refrigerating capacity by
means of “free-cooling”.
• compressor sequence rotation.
• management of low temperature
device (accessory).
• compressor operation hour count.
• start/stop.
• reset.
• permanent alarms memory.
• automatic start-up after drop in
voltage.
• multi-lingual message service.
• operation with local or remote
control.
• visualisation of machine status:
ON/OFF compressors;
alarms summary.
• alarms management:
high pressure; flow switch;
low pressure; anti-freeze;
compressor overload;
fan overload; pump overload.
• visualisation of the following
parameters:
water inlet temperature;
evaporator water inlet temperature;
water outlet temperature; delta T;
high pressure; low pressure;
waiting time for restart.
• alarms visualisation.
• settings:
a) without password:
cooling set;
total differential;
b) with password:
anti-freeze set;
low pressure exclusion time;
display language;
access code.
For further information, refer to the user
manual.

7
4 ACCESSORIES
AER485 Scheda per sistemi
MODBUS
Questo accessorio consente il collega-
mento dell’unità con sistemi di supervi-
sione BMS con standard elettrico RS
485 e protocollo di tipo MODBUS.
AVX anti-vibration support
Spring-operated, anti-vibration
supports.
DCPX 1
device for low temperatures
It consists of an electronic regulation
card that varies the number of
fan rotations on the basis of the
condensation pressure
GP protection grille
Each kit has two grilles.
PGS daily/weekly timer.
Card to be inserted in the electronic
card of the unit. Allows you to
programme two time bands per day,
and to have different programmings
for each day of the week.
TP1 2low pressure transducer
It makes it possible to show the value of
the compressor's intake pressure (one
per circuit) on the microprocessor card
display. Placed on the low pressure
side of the refrigerating circuit, it shuts
down compressor operation in the case
of abnormal operating pressure.
DRE 3Dispositivo riduyion ecor-
rente di spunto
Electronic peak current reducer. It
must be factory-mounted.
RIF 3Current rephaser.
Parallel connection
with the motor makes the reduction of
input current possible. This can only
be installed when the machine is being
made and must therefore be specified
when the order is placed.
ROMEO
Remote Overwatching Modem Enablig
Operation (Remote Overwatching
Modem Enabling Operation) is a devi-
ce that enables a remote control of a
chiller from an ordinary mobile phone
with WAP browser. Furthermore it
allows to send alarm or pre-alarm SMS
up to 3 GSM mobile phones which may
not be equipped with WAP browser
KEY
1 Standard in models: NRA L/ NRA D
2 Standard in models: NRA H - HL
3 It must be factory-mounted
MOD. ROMEO TP1 DRE AER485 PGS GP DCPX RIF AVX
VERSION STANDARD (°) S.a C.a
P1/P2/P3/P4
0800 • • (x2) 25 (x4) • • 260 29 64 151 152 151
0900 • • (x2) 25 (x2) - 30 (x2) • • 260 29 74 151 152 151
1000 • • (x2) 30 (x4) • • 260 29 84 151 152 151
1250 • • (x2) 38 (x4) • • 350 30 84 153 154 153
1400 • • (x2) 38 (x2) - 31 (x3) • • 350 30 85 153 154 153
1500 • • (x2) 30 (x6) • • 350 30 86 153 154 153
1650 • • (x2) 38 (x3) - 31 (x3) • • 500 30 86 601 602 P1-P3=601/P2-P4=603
1800 • • (x2) 38 (x6) • • 500 30 86 604 602 P1-P3=604/P2-P4=605
NRA A
0800 • • (x2) 25 (x4) • • 260 29 64 151 152 151
0900 • • (x2) 25 (x2) - 30 (x2) • • 260 29 74 151 152 151
1000 • • (x2) 30 (x4) • • 260 29 84 151 152 151
1250 • • (x2) 38 (x4) • • 350 30 84 153 154 153
1400 • • (x2) 38 (x2) - 31 (x3) • • 350 30 85 153 154 153
1500 • • (x2) 30 (x6) • • 350 30 86 153 154 153
1650 • • (x2) 38 (x3) - 31 (x3) • • 500 30 86 604 602 P1-P3=605/P2-P4=606
1800 • • (x2) 38 (x6) • • 500 30 86 604 602 P1-P3=605/P2-P4=606
NRA L
0800 • • (x2) 25 (x4) • • 260
std.
64 151 152 151
0900 • • (x2) 25 (x2) - 30 (x2) • • 260
std.
74 151 152 151
1000 • • (x2) 30 (x4) • • 260
std.
84 151 152 151
1250 • • (x2) 38 (x4) • • 350
std.
84 153 154 153
1400 • • (x2) 38 (x2) - 31 (x3) • • 350
std.
85 153 154 153
1500 • • (x2) 30 (x6) • • 350
std.
86 153 154 153
1650 • • (x2) 38 (x3) - 31 (x3) • • 500
std.
86 604 602 P1-P3=605/P2-P4=606
1800 • • (x2) 38 (x6) • • 500
std.
86 604 602 P1-P3=605/P2-P4=606
NRA HEAT PUMP VERSION H
0800 •
std.
25 (x4) • • 260 29 64 151 152 151
0900 •
std.
25 (x2) - 30 (x2) • • 260 29 74 151 152 151
1000 •
std.
30 (x4) • • 260 29 84 151 152 151
1250 •
std.
38 (x4) • • 350 30 84 153 154 153
1400 •
std.
38 (x2) - 31 (x3) • • 350 30 85 153 154 153
1500 •
std.
30 (x6) • • 350 30 86 153 154 153
1650 •
std.
38 (x3) - 31 (x3) • • 500 30 86 604 602 P1-P3=605/P2-P4=606
1800 •
std.
38 (x6) • • 500 30 86 604 602 P1-P3=605/P2-P4=606

8
MOD. ROMEO TP1 DRE AER485 PGS GP DCPX RIF AVX
NRA HL S.a C.a. P1/P2/P3/P4
0800 •
std.
25 (x4) • • 260
std.
64 151 152 151
0900 •
std.
25 (x2) - 30 (x2) • • 260
std.
74 151 152 151
1000 •
std.
30 (x4) • • 260
std.
84 151 152 151
1250 •
std.
38 (x4) • • 350
std.
84 153 154 153
1400 •
std.
38 (x2) - 31 (x3) • • 350
std.
85 153 154 153
1500 •
std.
30 (x6) • • 350
std.
86 153 154 153
1650 •
std.
38 (x3) - 31 (x3) • • 500
std.
86 604 602 P1-P3=605/P2-P4=606
1800 •
std.
38 (x6) • • 500
std.
86 604 602 P1-P3=605/P2-P4=606
NRA C
0800 • • (x2) 25 (x4) • • 260 29 64 151 152 151
0900 • • (x2) 25 (x2) - 30 (x2) • • 260 29 74 151 152 151
1000 • • (x2) 30 (x4) • • 260 29 84 151 152 151
1250 • • (x2) 38 (x4) • • 350 30 84 153 154 153
1400 • • (x2) 38 (x2) - 31 (x3) • • 350 30 85 153 154 153
1500 • • (x2) 30 (x6) • • 350 30 86 153 154 153
1650 • • (x2) 38 (x3) - 31 (x3) • • 500 30 86
1800 • • (x2) 38 (x6) • • 500 30 86
NRA LC
0800 • • (x2) 25 (x4) • • 260
std.
64 151 152 151
0900 • • (x2) 25 (x2) - 30 (x2) • • 260
std.
74 151 152 151
1000 • • (x2) 30 (x4) • • 260
std.
84 151 152 151
1250 • • (x2) 38 (x4) • • 350
std.
84 153 154 153
1400 • • (x2) 38 (x2) - 31 (x3) • • 350
std.
85 153 154 153
1500 • • (x2) 30 (x6) • • 350
std.
86 153 154 153
1650 • • (x2) 38 (x3) - 31 (x3) • • 500
std.
86
1800 • • (x2) 38 (x6) • • 500
std.
86
5 TECHNICAL DATA
5.1 NOMINAL REFERENCE
CONDITIONS
The technical data is calculated as follows
Cooling mode
- Temperature water inlet 12 °C
- Temperature of processed water 7 °C
- Ambient air temperature 35 °C
- ∆t 5°C
Heating mode
- Temperature of processed water 50 °C
- Ambient air temperature b.s. 7 °C
b.u. 6 °C
- ∆t 5°C
Sound Power
Aermec determines the value of sound
power on the basis of measurements per-
formed in compliance with regulation 9614,
in respect with that requested by Eurovent
certification.
(1) Sound Pressure
Sound pressure in free field on a reflective
surface (factor of directionality Q=2), at 10
metres from the external surface of the
unit, using the parallel expansion method
(box-method, ISO 3744)
NOTE
- The noise data refer to configuration without
pump.
- For heat pumps the data refers to functioning
in cooling mode
E.S.E.E.R.
There is a growing awareness in Europe
as well that attention needs to be paid
to the electricity consumed by air condi-
tioning machines. For many years now in
the United States talk has not just been
about efficiency in the plan conditions, but
an assessment index is used that takes
account of the marginal operation of the
unit under plan conditions and the greater
use with partial loads with external air that
is less than that planned and in conditions
of compressor capacity control. In Europe
the proposed EECCAC (Energy Efficiency
and Certification of Central Air Conditioner)
has been adopted, the ESEER (European
Seasonal Energy Efficiency Ratio), that has
the purpose of being able to compare the
chillers with each other.
After estimating the total energy required
by the system during summer manage-
ment (kW/h), the seasonal electrical ener-
gy consumption can be deduced with this
formula:
Input energy = Required energy
Efficiency index
The actual energy calculation can be obtai-
ned, more accurately, by considering:
1. The load profile with external tempera-
ture
2. The climatic profile
3. The total number of hours
With this data, every consultant or desi-
gner will be able to his or her evaluations.
KEY
DRE - RIF It must be factory-mounted
S.a = Without storage tank
C.a With storage tank
NOTE
The numbers in parenthesis indicate the
necessary quantity
ESEER = (3xEER100%+33xEER75%+41xEER50%+23xEER25%) / 100
Acqua uscita evaporatore 7 °C
∆T a pieno carico 5 °C
Carico 100% 75% 50% 25%
Temperatura aria esterna 35°C 30°C 25°C 20°C

9
5.2 TECHNICAL DATA, STANDARD VERSIONS (°)
NRA° 800 900 1000 1250 1400 1500 1650 1800
Cooling capacity: kW 211,0 236,0 261,0 320,0 363,0 390,0 434 480
Total input power kW 84,5 93,0 102,0 129,0 141,0 153,0 172 189
Evaporator water flow rate l/h 36290 40590 44890 55040 62440 67080 74650 82560
Evaporator pressure drop kPa 34,429,333,934,530,635,1 38,040,3
ENERGY INDICES
EER W/W 2,50 2,54 2,56 2,48 2,57 2,55 2,52 2,54
ESEER W/W 3.36 3.25 3.41 3.33 3.67 3.70 3.64 3.66
ELECTRICAL DATA
Fuel feed V3
~400 V 50Hz
Total input power A 145 160 174 222 242 261 296 323
Maximum current A 200 219 237 285 322 355 395 423
Peak current A 343 383 423 487 470 519 569 584
COMPRESSORS
Type scroll scroll scroll scroll scroll scroll scroll scroll
Number n° 44445666
Number per circuit n°+n°+n°+n° 2+2 2+2 2+2 2+2 2+3 3+3 3+3 3+3
COMPRESSOR HEATER
Compressor carter heater n° xW 4x13 0 4x130 4x130 4 x13 0 5x130 6x 130 6 x130 6x13 0
FANS
Type Axial Axial Axial Axial Axial Axial Axial Axial
Number n° 44466688
Input current ventilation unit A 1616162424243232
Input power ventilation unit kW 7,2 7,2 7,2 10,8 10,8 10,8 15,2 15,2
Air flow rate m3/h 86000 83000 80000 126000 120500 115000 170000 168000
EVAPORATORS
Type Plate Plate Plate Plate Plate Plate Plate Plate
Number n° 11111111
HYDRAULIC CIRCUIT
Water accumulation lt 700 700 700 700 700 700 700 700
Accumulation anti-freeze heater n°xW 2x300 2x300 2x300 2x300 2x300 2x300 2x300 2x300
PLUMBING CONNECTIONS STANDARD VERSIONS (hydraulic parallel not supplied)
Hydraulic connections Victaulic 3” 3” 3” 4” 4” 4” 4” 4”
LOW PRESSURE PUMPING UNIT
Input power kW 3,8 3,8 3,8 4,8 4,8 6,5 6,5 6,5
Input current A 6,226,226,228,14 8,14 11 11 11
Useful pressure pumping kPa 979582785868119101
HIGH PRESSURE PUMPING UNIT
Input power kW 6,5 6,5 6,5 8,6 8,6 8,6 12,5 12,3
Input current A 11111114,614,614,621,221,2
Useful pressure pumping kPa 215 212 195 215 190 157 257 240
SOUND DATA
Sounud Power dB(A) 88.5 88.5 88.5 91.5 91.0 90.5 92.0 94.0
Sound pressure (1) dB(A) 56.5 56.5 56.5 59.5 59.0 58.5 60.0 62.0
DIMENSIONS for all versions
Height mm 2450 2450 2450 2450 2450 2450 2450 2450
Width mm 2200 2200 2200 2200 2200 2200 2200 2200
Length mm 3400 3400 3400 4250 4250 4250 5750 5750
EMPTY WEIGHT versions without accumulation and pumps
kg 2350 2430 2465 3060 3150 3250 3640 3740

10
5.2 TECHNICAL DATA, HIGH EFFICIENCY VERSIONS A
NRA A 800 900 1000 1250 1400 1500 1650 1800
Cooling capacity: kW 217,0 243,0 268,0 330,0 374,0 400,0 450 495
Total input power kW 80,0 88,0 96,0 124,0 134,0 144,0 166 184
Evaporator water flow rate l/h 37320 41800 46100 56760 64330 68800 77400 85140
Evaporator pressure drop kPa 36,4 31,0 35,8 36,7 32,3 37,0 40,8 42,8
ENERGY INDICES
EER W/W 2,71 2,76 2,79 2,66 2,79 2,78 2,71 2,69
ESSER W/W 3.64 3.71 3.75 3.58 4.02 4.00 3.91 3.88
ELECTRICAL DATA
Fuel feed V3
~400 V 50Hz
Total input power A 140 154 168 213 233 253 287 315
Maximum current A 200 219 237 285 322 355 395 423
Peak current A 340 373 406 475 458 511 555 569
COMPRESSORS
Type scroll scroll scroll scroll scroll scroll scroll scroll
Number n° 44445666
Number per circuit n°+n°+n°+n° 2+2 2+2 2+2 2+2 2+3 3+3 3+3 3+3
COMPRESSOR HEATER
Compressor carter heater n° xW 4x 130 4x130 4 x13 0 4x130 5x 130 6 x130 6x130 6x 130
FANS
Type Axail Axail Axail Axail Axail Axail Axail Axail
Number n° 44466688
Input current ventilation unit A 1616162424243232
Input power ventilation unit kW 7,2 7,2 7,2 10,8 10,8 10,8 15,2 15,2
Air flow rate m3/h 80000 78000 76000 115000 111500 111000 162000 160000
EVAPORATORS
Type Plate Plate Plate Plate Plate Plate Plate Plate
Number n° 11111111
HYDRAULIC CIRCUIT
Water accumulation lt 700 700 700 700 700 700 700 700
Accumulation anti-freeze heater n°xW 2x300 2x300 2x300 2x300 2x300 2x300 2x300 2x300
PLUMBING CONNECTIONS STANDARD VERSIONS (hydraulic parallel not supplied)
Hydraulic connections Victaulic 3” 3” 3” 4” 4” 4” 4” 4”
LOW PRESSURE PUMPING UNIT
Input power kW 3,83,83,84,84,86,56,56,5
Input current A 6,22 6,22 6,22 8,14 8,14 11 11 11
Useful pressure pumping kPa 95907570455011495
HIGH PRESSURE PUMPING UNIT
Input power kW 6,5 6,5 6,5 8,6 8,6 8,6 12,3 12,3
Input current A 11111114,614,614,621,221,2
Useful pressure pumping kPa 210 207 185 203 180 142 252 234
SOUND DATA
Sounud Power dB(A) 88.0 88.0 88.0 91.0 90.5 90.0 91.5 93.5
Sound pressure (1) dB(A) 56.0 56.0 56.0 59.0 58.5 58.0 59.5 61.5
DIMENSIONS for all versions
Height mm 2450 2450 2450 2450 2450 2450 2450 2450
Width mm 2200 2200 2200 2200 2200 2200 2200 2200
Length mm 3400 3400 3400 4250 4250 4250 5750 5750
EMPTY WEIGHT versions without accumulation and pumps
kg 2430 2520 2560 3170 3270 3370 3840 3950

11
5.3 TECHNICAL DATA, SILENCED VERSIONS
NRA L 800 900 1000 1250 1400 1500 1650 1800
Cooling capacity: kW 190,0 213,0 235,0 292,0 329,0 353,0 404 446
Total input power kW 89,0 98,5 107,5 136,5 148,0 160,0 180 199
Evaporator water flow rate l/h 32680 36640 40420 50220 56590 60720 69490 76710
Evaporator pressure drop kPa 27,8 23,827,6 28,924,828,532,734,7
ENERGY INDICES
EER W/W 2,13 2,16 2,19 2,14 2,22 2,21 2,24 2,24
ESSER W/W 2.72 2.76 2.79 2.88 3.05 3.02 3.07 3.07
ELECTRICAL DATA
Fuel feed V3
~400 V 50Hz
Total input power A 151 166 180 229 250 270 301 330
Maximum current A 188 207 225 269 304 340 373 400
Peak current A 342 382 422 486 469 522 568 582
COMPRESSORS
Type scroll scroll scroll scroll scroll scroll scroll scroll
Number n° 44445666
Number per circuit n°+n°+n°+n° 2+2 2+2 2+2 2+2 2+3 3+3 3+3 3+3
COMPRESSOR HEATER
Compressor carter heater n° xW 4x 130 4x130 4 x13 0 4x130 5x 130 6 x130 6x130 6x 130
FANS
Type Axail Axail Axail Axail Axail Axail Axail Axail
Number n° 44466688
Input current ventilation unit A
Input power ventilation unit kW 2,9 3,0 3,1 4,0 4,5 5,0 6 6,2
Air flow rate m3/h 44000 50000 56000 68000 76000 84000 100000 112000
EVAPORATORS
Type Plate Plate Plate Plate Plate Plate Plate Plate
Number n° 11111111
HYDRAULIC CIRCUIT
Water accumulation lt 700 700 700 700 700 700 700 700
Accumulation anti-freeze heater n°xW 2x300 2x300 2x300 2x300 2x300 2x300 2x300 2x300
PLUMBING CONNECTIONS STANDARD VERSIONS (hydraulic parallel not supplied)
Hydraulic connections Victaulic 3” 3” 3” 4” 4” 4” 4” 4”
LOW PRESSURE PUMPING UNIT
Input power 3,8 3,8 3,8 4,8 4,8 6,5 6,5 6,5
Input current 6,22 6,22 6,22 8,14 8,14 11 11 11
Useful pressure pumping 120 116 102 110 90 12 2 130 113
HIGH PRESSURE PUMPING UNIT
Input power 6,5 6,5 6,5 8,6 8,6 8,6 12,5 12,3
Input current 11 11 11 14,6 14,6 14,6 21,2 21,2
Useful pressure pumping 232 235 216 245 230 200 267 251
DATI SONORI
Sounud Power dB(A) 83.0 83.0 83.0 86.0 85.5 85.0 86.5 88.5
Sound pressure (1) dB(A) 51.0 51.0 51.0 54.0 53.5 53.0 54.5 56.5
DIMENSIONI per tutti gli allestimenti
Height mm 2450 2450 2450 2450 2450 2450 2450 2450
Width mm 2200 2200 2200 2200 2200 2200 2200 2200
Length mm 3400 3400 3400 4250 4250 4250 5750 5750
PESO a vuoto senza accumulo e pompe
kg 2530 2570 2580 3310 3350 3390 3850 3950

12
5.4 TECHNICAL DATA, HEAT PUMP VERSIONS H
COLD MODE 800 900 1000 1250 1400 1500 1650 1800
Cooling capacity kW 196,0 220,0 242,0 312,0 345,0 365,0 420 470
Total input power kW 81,0 89,0 97,0 123,0 134,0 146,0 166 182
Evaporator water flow rate l/h 33710 37840 41620 53660 59340 62780 72240 80840
Evaporator pressure drop kPa 29,6 25,3 29,4 33,1 26,4 30,4 35,8 38,6
ENERGY INDICES
EER W/W 2,42 2,47 2,49 2,54 2,57 2,50 2,53 2,58
COP W/W 2,57 2,61 2,64 2,58 2,64 2,64 2,57 2,59
ESEER 3.25 3.32 3.35 3.41 3.67 3.60 3.65 3.72
HOT MODE
Cooling capacity kW 230,0 257,0 284,0 356,0 396,0 426,0 480 534
Total input power kW 89,5 98,5 107,5 138,0 150,0 161,5 187 206
Evaporator water flow rate l/h 39560 44200 48850 61230 68110 73270 82560 91850
Evaporator pressure drop kPa 43,7 40,6 43,4 42,6 42,1 44,7 66,7 71,3
DATI ELETTRICI
Fuel feed V3
~400 V 50Hz
Total input current only COOLING A 142 157 171 212 235 257 288 314
Corrente assorbita totale HEATING A 151 166 180 233 252 270 317 345
Maximum current A 200 219 237 285 322 355 395 423
Peak current A 340 380 420 491 484 515 586 611
COMPRESSORS
Type scroll scroll scroll scroll scroll scroll scroll scroll
Number n° 44445666
Number per circuit n°+n°+n°+n° 2+2 2+2 2+2 2+2 2+3 3+3 3+3 3+3
COMPRESSOR HEATER
Compressor carter heater n°xW 4x130 4x130 4x130 4x130 5x130 6x130 6x130 6x130
FANS
Type Axial Axial Axial Axial Axial Axial Axial Axial
Number n° 44466688
Input current ventilation unit A 1616162424243232
Input power ventilation unit kW 7,2 7,2 7,2 11,4 10,8 10,8 15,2 15,2
Air flow rate m3/h 86000 83000 80000 129000 120500 115000 162000 160000
EVAPORATORS
Type Plate Plate Plate Plate Plate Plate Plate Plate
Number n° 11111111
HYDRAULIC CIRCUIT
Water accumulation lt 700 700 700 700 700 700 700 700
Accumulation anti-freeze heater n°xW 2x300 2x300 2x300 2x300 2x300 2x300 2x300 2x300
PLUMBING CONNECTIONS STANDARD VERSIONS (hydraulic parallel not supplied)
Hydraulic connections Victaulic 3” 3” 3” 4” 4” 4” 4” 4”
LOW PRESSURE PUMPING UNIT
Input power kW 3,8 3,8 3,8 4,8 4,8 6,5 6,5 6,5
Input current A 6,22 6,22 6,22 8,14 8,14 11 11 11
Useful pressure pumping kPa 115 110 97 101 80 105 124 105
HIGH PRESSURE PUMPING UNIT
Input power kW 6,5 6,5 6,5 8,6 8,6 8,6 12,5 12,3
Input current A 11111114,614,614,621,221,2
Useful pressure pumping kPa 230 230 213 237 220 185 261 244
SOUND DATA
Sound Power dB(A) 88.5 88.5 88.5 91.5 91.0 90.5 92.0 94.0
Sound pressure (1) dB(A) 56.5 56.5 56.5 59.5 59.0 58.5 60.0 62.0
DIMENSIONS for all versions
Height mm 2450 2450 2450 2450 2450 2450 2450 2450
Width mm 2200 2200 2200 2200 2200 2200 2200 2200
Length mm 3400 3400 3400 4250 4250 4250 5750 5750
EMPTY WEIGHT versions without accumulation and pumps
kg 2480 2580 2610 3360 3400 3440 3880 3960

13
5.5 TECHNICAL DATA, HEAT PUMP VERSIONS HL
COLD MODE 800 900 1000 1250 1400 1500 1650 1800
Cooling capacity kW 175,0 196,0 217,0 286,0 312,0 326,0 387 430
Total input power kW 88,5 98,0 107,0 130,0 145,0 160,5 177 194
Evaporator water flow rate l/h 30100 33710 37320 49190 53660 56070 66050 73960
Evaporator pressure drop kPa 23,620,223,527,9 21,1 24,329,832,5
ENERGY INDICES
EER W/W 1,98 2,00 2,03 2,20 2,15 2,03 2,17 2,22
COP W/W 2.57 2.61 2.64 2.58 2.64 2.64 2.57 2.59
ESEER 2.53 2.56 2.59 2.96 2.95 2.78 2.97 3.04
HOT MODE
Cooling capacity kW 230,0 257,0 284,0 356,0 396,0 426,0 480 534
Total input power kW 89,5 98,5 107,5 0,0 0,0 161,5 0,0 0,0
Evaporator water flow rate l/h 39560 44200 48850 61230 68110 73270 82560 91850
Evaporator pressure drop kPa 43,7 40,6 43,4 42,6 42,1 44,7 66,7 71,3
DATI ELETTRICI
Fuel feed V3
~400 V 50Hz
Total input current only COOLING A 147 163 180 212 241 270 298 323
Corrente assorbita totale HEATING A 151 166 180 233 252 270 301 329
Maximum current A 200 219 237 285 322 355 395 423
Peak current A 355 395 435 510 503 538 610 635
COMPRESSORS
Type scroll scroll scroll scroll scroll scroll scroll scroll
Number n° 44445666
Number per circuit n°+n°+n°+n° 2+2 2+2 2+2 2+2 2+3 3+3 3+3 3+3
COMPRESSOR HEATER
Compressor carter heater n°xW 4x130 4x130 4x130 4x130 5x130 6x130 6x130 6x130
FANS
Type Axila Axila Axila Axila Axila Axila Axila Axila
Number n° 44466688
Input current ventilation unit A
Input power ventilation unit kW 2,2 2,3 2,4 3,3 4,15 5 4,6 4,8
Air flow rate m3/h 44000 50000 56000 68000 76000 84000 100000 112000
EVAPORATORS
Type piastre piastre piastre piastre piastre piastre piastre piastre
Number n° 11111111
HYDRAULIC CIRCUIT
Water accumulation lt 700 700 700 700 700 700 700 700
Accumulation anti-freeze heater n°xW 2x300 2x300 2x300 2x300 2x300 2x300 2x300 2x300
PLUMBING CONNECTIONS STANDARD VERSIONS (hydraulic parallel not supplied)
Hydraulic connections Victaulic 3” 3” 3” 4” 4” 4” 4” 4”
LOW PRESSURE PUMPING UNIT
Input power kW 3,8 3,8 3,8 4,8 4,8 6,5 6,5 6,5
Input current A 6,22 6,22 6,22 8,14 8,14 11 11 11
Useful pressure pumping kPa 128 128 118 130 116 155 135 118
HIGH PRESSURE PUMPING UNIT
Input power kW 6,5 6,5 6,5 8,6 8,6 8,6 12,5 12,3
Input current A 11 11 11 14,6 14,6 14,6 21,2 21,2
Useful pressure pumping kPa 240 245 235 265 260 230 273 256
SOUND DATA
Sound Power dB(A) 83.0 83.0 83.0 86.0 85.5 85.0 86.5 88.5
Sound pressure (1) dB(A) 51.0 51.0 51.0 54.0 53.5 53.0 54.5 56.5
DIMENSIONS for all versions
Height mm 2450 2450 2450 2450 2450 2450 2450 2450
Width mm 2200 2200 2200 2200 2200 2200 2200 2200
Length mm 3400 3400 3400 4250 4250 4250 5750 5750
EMPTY WEIGHT versions without accumulation and pumps
kg 2480 2580 2610 3360 3400 3440 3880 3960
NOTE
Silenced functioning is only in cooling

14
6 SELECTION CRITERIA
6.1 OPERATING LIMITS
The devices in their standard
configurations are not suitable for
installation in salty environments. The
maximum and minimum limits for
the water flow rate to the exchanger
are indicated by the curves of the
pressure drop diagrams. For the
operating limits, refer to the diagrams
below, valid for ∆t = 5°C.
WARNING:
-
operation with a processed water
temperature of less than 4°C is only
allowed for the versions specifically
designed for this (version YA).
- if you want to operate the machine
outside the limits indicated in
the diagram, please contact the
AERMEC technical/commercial
office.
- if the machine is positioned in
particularly windy areas, it is
necessary to install windbreak
barriers to avoid the inconstant
operation of the DCPX device.
VERSION
•standard (°) 35 - 42°C
•high temperature 40 - 46°C
•silenced L 40 - 46°C
•heat pump H 40 - 46°C
-6
-10
-5
0
5
10
15
20
25
30
35
40
36
50
-4 1514131211109876543210-2
46 46
42
40
35
42
Processed water temperature °C
Outside air temp. d.b. °C
versioni Y
1
2
3
4
KEY
1 Operation with glycol water
only for versions YA
2 Operation with glycol water
and DCPX
3 Standard operation
4 Operation with DCPX
"Cold mode"
"Hot mode"
-15 -10 -5 0 5 10 15 20 25
20
25
30
35
40
45
50
55
50
Processed water temperature °C
Outside air temp. d.b. °C
VERSION
•H in heat pump
6.2 PROJECT DATA
(1) = only for heat pump versions
High pressure
side
Low pressure
side
Maximum pressure allowed bar 30 / 28 (1) 22
Maximum temperature allowed °C 120 52
Minimum temperature allowed °C -10 -16 / -10 (1)

15
7 CORRECTION COEFFICIENTS
7.1 COOLING AND INPUT
CAPACITIES
- “STANDARD VERSIONS”
- “HEAT PUMP VERSIONS IN COLD
MODE”
- “HIGH TEMPERATURE VERSIONS”
The refrigerating capacity yielded
and the input electrical capacity in
conditions other than rated conditions
are obtained by multiplying the rated
values (Pf, Pa) by the respective
correction coefficients (Cft, Cpa).
The following diagrams allow you to
obtain the correction coefficients to
be used for the various versions of the
devices, in cold mode; next to each curve
you can see the outside air temperature
to which it refers.
KEY:
Cf = Cooling capacity correction
coefficient
Ca = Input power correction
coefficient
N.B.
FOR VERSIONS Y with temperatures
lower than 4°C, contact the company
headquarters
FOR ∆T OTHER THAN 5°C
For the evaporator, the Tav.7.4 is
used to obtain the correction factors
of the cooling and input capacities.
To take into account the dirtying of
the exchangers, the relative dirtying
factors are used
¨:^©
¨:Y©
Temperature of the water produced (∆t = 5°C)
(Cf)
(Ca)
Outside air temperature

16
7.2 COOLING AND INPUT
CAPACITIES
- “SILENCED VERSIONS”
The cooling capacity yielded and the
electrical input power in conditions
other than rated conditions are
obtained by multiplying the rated values
(Pf, Pa) by the respective correction
coefficients (Cf, Ca).
The following diagrams allow you to
obtain the correction coefficients to
be used for the various versions of the
devices, in cold mode; next to each curve
you can see the outside air temperature
to which it refers.
KEY:
Cf = Cooling capacity correction
coefficient
Ca = Input power correction
coefficient
N.B.
- FOR THE VERSIONS Y
with temperatures below 4°C
contact company headquarters
¨:
Y
¨:
^
(Ca)
(Cf)
Processed water temperature (∆t = 5°C)

17
7.3 HEATING AND INPUT
CAPACITIES
- “HEAT PUMP VERSIONS”
The heating capacity yielded and the
electrical input power in conditions
other than rated conditions are
obtained by multiplying the rated values
(Pf, Pa) by the respective correction
coefficients (Cft, Cpa).
The following diagram makes it possible
to obtain the correction coefficients;
next to each curve, you can see the
temperature of the hot processed
water to which it refers, assuming
a difference of water temperature
between the inlet and outlet of the
condenser equal to 5°C.
The yields are intended as net of the
defrosting cycles.
KEY:
Ct = Heating capacity correction
coefficient
Ca = Input power correction
coefficient
7.4 FOR ∆T OTHER
THAN NOMINAL
For ∆t other than 5°C, the Tav.1 is
used on the evaporator to obtain the
correction factors of the cooling and
input capacities. To take into account
the dirtying of the exchangers, the
relative dirtying factors are used
7.5 FOULING FACTORS
The performance shown by the table
refers to conditions with clean tubes,
with a fouling factor = 1. For other
fouling factor values, multiply the data
of the performance tables by the
coefficients given.
Outside air temperature b.s. with 87% humidity
(Ct)
(Ca)
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7.4.1 Correction factors for ∆t other than nominal, Chiller
35810
Cooling capacity correction factors 0,99 1 1,02 1,03
Cooling capacity correction factors 0,99 1 1,01 1,02
[K*m2]/[W] 0,00005 0,0001 0,0002
Cooling capacity correction factors 1 0.98 0.94
Cooling capacity correction factors 1 0,98 0,95
7.5.1 Fouling factors
Processed water temperature

18
The cooling capacity and input power
correction factors make allowance for
the presence of glycol and the different
evaporation temperature.
The correction factors of the water
flow rate and the pressure drops are
applied directly to the data obtained
for operation without glycols. The
correction factor of the water flow
rate is calculated so as to maintain
the same ∆t that would be used in the
absence of glycols.
- The correction factor of the pressure
drop already takes into account the
different capacity deriving from the
application of the water flow rate
correction factor.
- The correction factors of the water
flow rate and the pressure drops are
applied directly to the data obtained
for operation without glycols.
- The correction factors of the cooling
and input capacities take into
account the presence of glycols.
- The correction factors of the water
flow rate and the pressure drops are
applied directly to the data obtained
for operation without glycols.
- The correction factor of the water
flow rate is calculated so as to
maintain the same Dt that would be
used in the absence of glycols.
- The correction factor of the pressure
drop already takes into account the
different capacity deriving from the
application of the water flow rate
correction factor.
NOTE
To make it easier to read the graph, an
example is given on the next page.
By using the diagram opposite it
possible to establish the percentage of
glycol necessary; this percentage can
be calculated taking into account one
of the following factors:
On the basis of the fluid considered
(water or air), it will be necessary to
enter the graph from the right or
left side, from the intersection of the
outside air temperature or processed
water temperature straight lines and
the relative curves, a point is obtained
through which the vertical line that will
identify both the percentage of glycol
and the relative correction coefficients
will have to pass.
8.1 HOW TO READ
THE GLYCOL CURVES
The curves shown in the figure
summarise a notable quantity of data,
each of which is represented by a
specific curve. In order to use these
curves correctly, it is necessary to
make some initial considerations:
- If you want to calculate the
percentage of glycol on the basis
of the outside air temperature, you
must enter from the left-hand axis
and, once you have intersected
the curve, trace a vertical line
which, in turn, will intercept all the
other curves; the points obtained
from the upper curves represent
8 ETHYLENE GLYCOL SOLUTION
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KEY:
FcGPf Correction factor of the
cooling capacity
FcGPa Correction factor of the
input power
FcGDpF (a) C o rr ection factor of
the pressure drops
(evaporator) (average
temp. = -3.5°C)
FcGDpF (b) Correction factor of the
pressure drops (average
temp. = 0.5°C)
FcGDpF (c) Correction factor of the
pressure drops (average
temp. = 5.5°C)
FcGDpF (d) Correction factor of the
pressure drops (average
temp. = 9.5°C)
FcGDpF (e) Correction factor of the
pressure drops (average
temp. = 47.5°C)
FcGQF Correction factor of the
outputs (evaporator)
(average temp. = 9.5°C)
FcGQC Correction factor of the
outputs (condenser)
(average temp. = 47.5°C)
NOTE
Although the graph reaches
outside air temperatures of -
40°C, it is necessary to maintain
the machine's operating limits as
reference.