AERMEC NRK 0200 User manual

EN
Technical Manual
5167556_03 17.10
Aermec
partecipa al Programma
EUROVENT: LCP
I prodotti interessati figurano sul sito
www.eurovent-certification.com
• REVERSIBLE HEAT PUMPS HIGH EFFICENCY
• OUTDOOR UNIT
• HIGH EFFICIENCY
• PRODUCTION OF HOT WATER UP TO 65°C
NRK 0200-0700

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Dear Customer,
Thank you for choosing an AERMEC product. This product is the result of many years of experience and in-
depth engineering research, and it is built using top quality materials and advanced technologies.
In addition, the applied mark guarantees that our appliances fully comply with the safety requirements
defined by the applicable product’s rules. We constantly monitor the quality level, and as a result AERMEC
products are synonymous with Safety, Quality, and Reliability.
Aermec reserves the right to make all modification deemed necessary for improving the product at any time
with any modification of technical data.
Thank you again.
AERMEC S.p.A

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1. ....................................................................................................................... 6
  ................................................................................................................................ 7
 .............................................................................................................................................. 8
 ......................................................................................................... 10
  .............................................................................................................. 16
5.1. Refrigerant Circuit ..................................................................................................................................... 16
5.2. Structure And Fans.................................................................................................................................... 16
5.3. Standard Hydraulic Circuit ........................................................................................................................ 16
5.4. Safety And Control Components............................................................................................................... 17
5.5. Electric Control And Power Board............................................................................................................. 17
  ....................................................................................................................................... 18
 ................................................................................................................................... 19
  ............................................................................................................................ 21
8.1. Cooling Mode............................................................................................................................................ 21
  ........................................................................................................................................... 21
 ................................................... 22
  ......................................................................................................................... 28
 ...................................................................................................................... 30
 ............................................................................................................. 33
  .................................................................................................................. 33
  .............................................................................................................................................. 34
 ........................................................................................................................................ 35
  ................................................................................. 36

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Bevilacqua (VR) Commercial Director
Luigi Zucchi
AERMEC S.p.A.
37040 Bevilacqua (VR) Italy –Via Roma, 996
Tel. [phone] –Fax [phone]
www.aermec.com
DICHIARAZIONE DI CONFORMITÀ CE
EC DECLARATION OF CONFORMITY / DECLARATION DE CONFORMITE CE
KONFORMITÄTSERKLÄRUNG EG / DECLARACIÓN DE CONFORMIDAD CE
NAME
Noi, firmatari della presente, dichiariamo sotto la nostra esclusiva responsabilità che l'insieme in oggetto così definito:
We, the undersigned, hereby declare under our own responsibility that the assembly in question, defined as follows:
Nous, Signataires du présent acte, déclarons sous notre responsabilité exclusive que le groupe cité à l’objet défini de la façon suivante:
Die Unterzeichner erklären unter eigener Verantwortung, dass die oben genannte Maschineneinheit, bestehend aus:
Nosotros, los abajo firmantes, declaramos bajo nuestra exclusiva responsabilidad, que el conjunto en cuestión, denominado:
Nome / Name / Nom / Name / Nombre NOME DI PROVA
Tipo / Type / Type / Typ / Tipo TIPOLOGIA DI UNITÀ
Modello / Model / Modèle / Model / Modelo MODELLO (PER ESTESO)
A cui questa dichiarazione si riferisce è conforme a tutte le disposizioni pertinenti delle seguenti direttive:
To which this declaration refers, complies with all the provisions related to the following directives:
Auquel cette déclaration se réfère, est conforme à toutes les dispositions relatives des directives suivantes:
Das Gerät, auf welches sich diese Erklärung bezieht, entspricht allen Verordnungen im Zusammenhang mit den folgenden Richtlinien:
A la que esta declaración se refiere, es conforme con todas las disposiciones pertinentes de las siguientes directivas:
Direttiva Macchine: 2006/42/CE
Direttiva Compatibilità Elettromagnetica EMCD: 2014/30/UE
Direttiva PED in materia di attrezzature a pressione: 2014/68/UE
L’oggetto della dichiarazione di cui sopra è conforme alle pertinenti normative di armonizzazione dell’Unione:
The above-mentioned declaration complies with the harmonised European standards:
L'objet de la déclaration reportée ci-dessus est conforme aux normes d’harmonisation relatives de l'Union:
Der Gegenstand der genannten Erklärung entspricht den diesbezüglichen harmonisierten Normen der europäischen Gemeinschaft:
El objeto de la declaración de arriba es conforme con las normativas pertinentes de armonización de la Unión:
CEI EN 60335-2-40: 2005 CEI EN 61000-6-1: 2007 UNI EN 378-2: 2012
CEI EN 60335-2-40/A1: 2007 CEI EN 61000-6-3: 2007 UNI EN 12735-1: 2010
CEI EN 60335-2-40/A2: 2009 CEI EN 55014-1: 2008
CEI EN 60335-2-40/A13: 2012 CEI EN 55014-2: 1998
La presente dichiarazione di conformità è rilasciata sotto la responsabilità esclusiva del fabbricante
This declaration of conformity has been released under the exclusive responsibility of the manufacturer
La déclaration de conformité présente est délivrée sous la responsabilité exclusive du fabricant
Diese Konformitätserklärung wurde unter der ausschließlichen Verantwortung des Herstellers ausgestellt
Esta declaración de conformidad se ha otorgado bajo la responsabilidad exclusiva del fabricante
La persona autorizzata a costituire il fascicolo tecnico è Luca Martin. Il prodotto, in accordo con la direttiva 2014/68/UE, soddisfa la procedura di Garanzia qualità
Totale (modulo H) con certificato n.06/270-QT3664 Rev. 10 emesso dall’organismo notificato n.1131 CEC via Pisacane 46 Legnano (MI) –Italy.
The person authorised to compile the technical file is Luca Martin. The product, in agreement with Directive 2014/68/EU, satisfies the Total quality Guarantee
procedure (form H) with certificate no. 06/270-QT3664 Rev. 10 issued by the notified body n.1131 CEC via Pisacane 46 Legnano (MI) - Italy.
La personne autorisée à constituer le dossier technique est Luca Martin. Le produit, selon la directive 2014/68/UE, respecte la procédure de Garantie de qualité
Totale (module H) par le certificat n.06/270-QT3664 Rév. 10 émis par l’organisme notifié n.1131 CEC via Pisacane 46 Legnano (MI) - Italie.
Die bevollmächtigt, die technischen Unterlagen zusammenzustellen ist Luca Martin. In Übereinstimmung mit der Richtlinie 2014/68/EU, erfüllt das Produkt die
Anforderungen des Verfahrens der umfassenden Qualitätssicherung (Modul H), Zertifikat Nr.06/270-QT3664 Rev. 10, ausgestellt durch benannte Stelle Nr. 1131
CEC Via Pisacane 46, Legnano (MI) - Italy.
La persona facultada para elaborar el expediente técnico es Luca Martin. El producto, conforme a la directiva 2014/68/UE, cumple con el procedimiento de
Garantía de calidad total (módulo H) con certificado n. 06/270-QT3664 Rev. 10 emitido por el organismo autorizado n. 1131 CEC via Pisacane 46 Legnano (MI) -
Italia.
NRK
NRK


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1. DESCRIPTION OF THE UNIT
The reversible heating pumps of the NRK series were designed to meet the require-
ments of the systems where both cooled water for environment cooling and high
temperature water for heating are required. The compressor with additional vapour
admission in the compression cycle allows to obtain hot water temperatures up to
65°C and an increase of the operating limits with regards to outside temperatures of
up to -20°C.

Multi-circuit unit designed to provide the maximum
efficiency both with full load and partial loads,
guaranteeing operating continuity should one of the
circuits stop to facilitate maintenance.
Having several compressors and circuits ensures
control of more steps of power yielded in both modes.

These high temperature units are commonly used in the requalification of buildings
where the replacement of centralised boilers is required, and preservation of the
existing heating system (including radiators) is needed.
This scenario is frequent for buildings like schools or offices, but can also applied to
residential complexes like condominiums, where requalification expenses need to
be limited, while offering at the same time a renewable energetic source such as the
heat pump.
Another advantage is the possibility to manage hot water production for heating (or
even domestic hot water) as well as the cooled water for summer conditioning with
the same machine.
To get a solution that offers economic savings and facilitates
the installation, these units may be configured with an integrated hydronic kit.
The kit consists of the main hydraulic components and is available in many configura-
tions with single pump or with reserve pump, with low or high head and accumulator.
(see configurator)

Full operation with outside temperatures of up to -20°C and hot water production up
to 65°C
MODEL

Standard reversible heat pump without partial heat recovery.

Reversible heat pump complete with partial heat recovery. The refrigerant/water heat
exchanger is placed in all circuits upstream the condenser and its size ensure heat
recovery for hot water production which may be used as domestic hot water or other
use.
VERSION
NRK_HA
Versions with high efficiency configurations beyond the A-class efficiency required by
Eurovent.
NRK_HE
Low noise A-class high efficiency versions. This version is equipped with sound insula-
tion dedicated to the compressor compartment and the reduction of the fan revolu-
tions. Since the speed of the fans is electronically controlled, it will be automatically
increased to keep ensuring good unit operation in the event of critical ambient
conditions.

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2. UNIT CONFIGURATOR
Field Code
1,2,3 NRK
4,5,6,7 Size
0200-0280-0300-0330-0350-0500-0550-0600-0650-0700 (1)
8 Field of application
°Termostatic expansion valve(2)
9 Model
HHeat pumps
10 Heat recovery
°Without recovery
DWith Desuperheater
11 Version
AHigh efficiency
EHigh efficiency in low noise operation
12 Coil
°In aluminium
RIn copper
SIn tinned copper
VIn painted aluminium-copper (epoxy paint)
13 Fans (3)
°Standard
MIncreased
JHigh static pressure
Inverter
14 Alimentation
°400V/3N/50Hz with circuit breakers
15-16 System integrated hydronic module (4)
00 without pumps or buffer tank
01 Buffer tank and
n° 1 low head static pressure pump
02 Buffer tank and
n° 2 low head static pressure pump
03 Buffer tank and
n° 1 high head static pressure pump
04 Buffer tank and
n° 2 high head static pressure pump
05
n°1 low head static pressure pump and buffer tank (with holes for immersion heaters) (5)
06
n°2 low head static pressure pump and buffer tank (with holes for immersion heaters) (5)
07
n°1 high head static pressure pump and buffer tank (with holes for immersion heaters) (5)
08
n°2 high head static pressure pump and buffer tank (with holes for immersion heaters) (5)
P1
n° 1 low head static pressure pump
P2
n° 2 low head static pressure pump
P3 n° 1 high head static pressure pump
P4
n° 2 high head static pressure pump
(2) The size 0200-0280-0300-0330 only available in low noise version "HL" and equipped with inverter fans as standard
(3) Leaving water temperature down to 4°C
(4) Standard on/off fans for sizes from 0350 to 0700
Increased on/off fans, option for sizes from 0200 to 0330
Standard Inverter fans for sizes from 0200 to 0330, without useful static pressure
Inverter fan, option for sizes from 0350 to 0700 with useful static pressure
(5) The buer tank with holes and supplementary electric heaters leave the factory with plastic protection caps. Before loading the system, if the installation of an electric heater
is not envisaged it is compulsory to replace the plastic caps

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3. CECK LIST
  TOTAL RECOVERY HYDRONIC KIT
NOTE   00 01-03 02-04 P1-P3 P2-P4
REFRIGERANT CIRCUITS
n°2 refrigerant circuit indipendenti ad R410A • • • • • • •
Scroll compressor • • • • • • •
Cycle reversing valve • • • • • • •
High pressure trasducer • • • • • • •
Low pressure trasducer • • • • • • •
High pressure switch • • • • • • •
Low pressure switch - - - - - - -
Source side heat exchanger (Finned pack) • • • • • • •
No-return valves • • • • • • •
Deydrator filter • • • • • • •
Indicator for liquid • • • • • • •
Stafty valve HP branch - - - - - - -
Stafty valve LP branch • • • • • • •
Shut-off valves • • • • • • •
Economiser electronic thermostatic valve • • • • • • •
Economiser • • • • • • •
Solenoid valve • • • • • • •
Thermostatic valve • • • • • • •
System side heat exchanger (plate exchanger) • • • • • • •
Liquid storage tank • • • • • • •
Liquid separators • • • • • • •
Desuperheater (plate exchanger) - • • • • • •
HYDRAULIC CIRCUIT

System side heat exchanger (plate) • • • • • • •
Electrical heater exchanger • • • • • • •
Water filter • • • • • • •
Flow switch • • • • • • •
Pressure switch - - - - - - -
Safety valve - - - • • - -
Air vent valve - - - - - - -
Automatic air vent valve • • • • • • •
Charger plant - - - - - - -
Probe inlet water temperature • • • • • • •
Probe outlet water temperature - - - - - - -
Buffer tank - - - • • - -
n° 1 pump - - - • - • -
n° 2 pumps (n°1 on, n°1 stand-by) - - - - • - •
No-return valves - - - - • - •
Expansion vessel - - - • • • •
Discharge valve • • • • • • •

Recovery side heat exchanger (desuperheater) •
Electrical heater exchanger •
Water filter •
Flow switch -
Pressure switch -
Safety valve -
Air vent valve -
Automatic air vent valve •
Charger plant -
Probe inlet water temperature -
Probe outlet water temperature -
Buffer tank -
n° 1 pump -
n° 2 pumps (n°1 on, n°1 stand-by) -
no-return valves -
Expansion vessel -
Discharge valve •

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  TOTAL RECOVERY HYDRONIC KIT
NOTE   00 01-03 02-04 P1-P3 P2-P4
FAN GROUP
Standard fans • • • • • • •
High static pressure (with static pressure)  • • •••••
High static pressure Inverter (with static pressure)  • • •••••
Condensation pressure controller (DCPX) • • • • • • •
- not available
• standard
For the availability of the , please refer to the configurator

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4. OPERATIONAL PRINCIPLE DIAGRAMS
4.1. ÷
4.2. ÷
CP
CN CN
EV
FD FD
VSL
AL
LS
VSB
VIE1 VIE1
ECO
VT
IDL
VU
VU VU
VU VU
VU VU
VIC VIC
VU
CP
VSL1
AL
LS
VSB
VT
ECO
IDL
ECO
VIC
CP
EV
CN
FD
VSL1
AL
LS
VSB
VIE1 VT
IDL
VU
VU
VU VU
ECO
CP
EV
FD
VSL1
AL
LS
VSB
VIE1VT
IDL
VU
VU
VU VU
 
1System side
HEAT EXCHANGER
(EVAPORATION)
Cold water production
2Source side
HEAT EXCHANGER
(CONDENSATION)
Heat exchange with air
 
1System side
HEAT EXCHANGER
(CONDENSATION)
Hot water production
2Source side
HEAT EXCHANGER
(EVAPORATION)
Heat exchange with air
H2

H2

1
22
1
22

CN Condenser
EV Evaporator
CP Compressor
AL Liquid storage tank
VU One-way valve
FD Dehydrator filter
IDL Liquid indicator
VIE Economiser electronic thermostatic valve
ECO Economizer
VSL Solenoyd valve
VT Thermostatic valve
VSB Solenoid valve by-pass
LPT Low pressure trasducer
LS Liquid separator
VIC Cycle reversing valve
H2

H2


11Aermec cod. 5167556_03 17.09
NRK 0200-0700
4.3. 
4.4. 
CP
CN
FD
VSL1
AL
LS
VSB
VIE1
ECO
VT
IDL
VU
VU
VU
VIC
VU
CP
CP
CN
EV
FD
VSL1
AL
LS
VSB
VIE1
ECO
TEV
IDL
VU
VU
VU VU
VSI
VSI
ECO
VIC VIC
CP
EV
FD
VSL1
AL
LS
VSB
VIE1 VT
IDL
VU
CV
VU
VU
CN
ECO
EV
FD
VSL1
AL
LS
VSB
VIE1VT
IDL
VU
VU
VU VU
CP
CP
VSI1A
VSI1
 
1System side
HEAT EXCHANGER
(EVAPORATION)
Cold water production
2Source side
HEAT EXCHANGER
(CONDENSATION)
Heat exchange with air
H2

H2O RITORNO
IMPIANTO
H2

H2O MANDATA
IMPIANTO
1
2 2
1
2 2

CN Condenser
EV Evaporator
CP Compressor
AL Liquid storage tank
VU One-way valve
FD Dehydrator filter
IDL Liquid indicator
VIE Economiser electronic thermostatic valve
ECO Economizer
VSL Solenoyd valve
VT Thermostatic valve
VSB Solenoid valve by-pass
LPT Low pressure trasducer
LS Liquid separator
VIC Cycle reversing valve
 
1System side
HEAT EXCHANGER
(CONDENSATION)
Hot water production
2Source side
HEAT EXCHANGER
(EVAPORATION)
Heat exchange with air

12 Aermec cod. 5167556_03 17.09
NRK 0200-0700
4.5. ÷
4.6. ÷
CP
CP
CP
CP
CN CN
EV
FD
VSL1
AL
LS
VSB
VIE1
ECO
VT
IDL
VU
VU
VU
VU
FD
VSL1
LS
VSB
VE
AL
ECO
VT
IDL
VU
VU
VU VU
VSI
VSI
VSI1
VSI1A
VIC
ECO
VIC VIC
EV
CN
FD
VSL1
AL
LS
VSB
VIE1 VT
IDL
VU
VU
VU
VU
ECO
EV
FD
VSL1
AL
LS
VSB
VIE1VT
IDL
CV
VU
VU VU
CP
CP
VSI1
VSI1A
CP
CP
VSI1
VSI1A
1
2 2
1
2 2

CN Condenser
EV Evaporator
CP Compressor
AL Liquid storage tank
VU One-way valve
FD Dehydrator filter
IDL Liquid indicator
VIE Economiser electronic thermostatic valve
ECO Economizer
VSL Solenoyd valve
VT Thermostatic valve
VSB Solenoid valve by-pass
VSI Hot gas injection solenoid valves
LS Liquid separator
VIC Cycle reversing valve
 
1System side
HEAT EXCHANGER
(EVAPORATION)
Cold water production
2Source side
HEAT EXCHANGER
(CONDENSATION)
Heat exchange with air
H2

H2

H2

H2

 
1System side
HEAT EXCHANGER
(CONDENSATION)
Hot water production
2Source side
HEAT EXCHANGER
(EVAPORATION)
Heat exchange with air

13Aermec cod. 5167556_03 17.09
NRK 0200-0700
4.7. ÷
4.8. ÷
CP
CP
CP
CP
CN CN
EV
FD
VSL1
AL
LS
VSB
ECO
VIE1
VIE1A
VT
IDL
VU
VU
VU
VU
FD
VS
LS
AL
VSB
VIE1
ECO
VIE1A
VT
IDL
VU
VU
VU VU
VSI1
VSI1A
VSI1
VSI1A
ECO
VIC VIC
EV
CN
FD
VSL1
AL
LS
VSB
VT
IDL
VU
VU
VU
VU
ECO
EV
FD
VSL1
AL
LS
VSB
VIE1VT
IDL
VU
VU
VU VU
CP
CP
VSI1
VSI1A
VSI1
VSI1A
CP
CP
VIE1A
VIE1
VIE1A
1
2 2
1
2 2

CN Condenser
EV Evaporator
CP Compressor
AL Liquid storage tank
VU One-way valve
FD Dehydrator filter
IDL Liquid indicator
VIE Economiser electronic thermostatic valve
ECO Economizer
VSL Solenoyd valve
VT Thermostatic valve
VSB Solenoid valve by-pass
VSI Hot gas injection solenoid valves
LS Liquid separator
VIC Cycle reversing valve
 
1System side
HEAT EXCHANGER
(EVAPORATION)
Cold water production
2Source side
HEAT EXCHANGER
(CONDENSATION)
Heat exchange with air
H2

H2

H2

H2

 
1System side
HEAT EXCHANGER
(CONDENSATION)
Hot water production
2Source side
HEAT EXCHANGER
(EVAPORATION)
Heat exchange with air

14 Aermec cod. 5167556_03 17.09
NRK 0200-0700
4.9. ÷ DESUPERHEATER
CP
CN
EV
FD
VSL1
AL
LS
VSB
VIE1
ECO
DES DES
VT
IDL
VIC VIC
VU
VU
VU
VU
CP
CN
FD
VSL1
AL
LS
VSB
VIE1
ECO
TV
IDL
VU
VU
VU VU
 
1System side
HEAT EXCHANGER
(EVAPORATION)
Cold water production
2Source side
HEAT EXCHANGER
(CONDENSATION)
Heat exchange with air
3Desuperheater side
HEAT EXCHANGER
(CONDENSATION)
Hot water production
1
2
3
2

CN Condenser
EV Evaporator
DES Desuperheater
CP Compressor
AL Liquid storage tank
VU One-way valve
FD Dehydrator filter
IDL Liquid indicator
VIE Economiser electronic thermostatic valve
ECO Economizer
VSL Solenoyd valve
VT Thermostatic valve
VSB Solenoid valve by-pass
LS Liquid separator
VIC Cycle reversing valve
H2

H2

H2

H2

4.10.  DESUPERHEATER
CP
CN
EV
FD
VSL1
AL
LS
VSB
VIE1
ECO
DES
VT
IDL
VIC VIC
VU
VU
VU
VU
EV
DES
CN
FD
VSL1
AL
LS
VSB
VIE1
ECO
TV
IDL
VU
VU
VU VU
CP
CP
VSI1
VSI1A
 
1System side
HEAT EXCHANGER
(EVAPORATION)
Cold water production
2Source side
HEAT EXCHANGER
(CONDENSATION)
Heat exchange with air
3Desuperheater side
HEAT EXCHANGER
(CONDENSATION)
Hot water production
1
2
3
2
H2

H2

H2

H2


15Aermec cod. 5167556_03 17.09
NRK 0200-0700
4.11. ÷ DESUPERHEATER
CN
EV
FD
VSL1
AL
LS
VSB
VIE1
ECO
DES DES
VT
IDL
VIC VIC
VU
VU
VU
VU
CN
FD
VSL1
AL
LS
VSB
VIE1
ECO
VT
IDL
CV
VU
VU VU
CP
CP
VSI1A
VSI1
VSI1A
VSI1
CP
CP
1
2
3
2

CN Condenser
EV Evaporator
DES Desuperheater
CP Compressor
AL Liquid storage tank
CV One-way valve
FDehydrator filter
IDL Liquid indicator
VE Economiser electronic thermostatic valve
ECO Economizer
VS Solenoyd valve
TEV Thermostatic valve
VSB Solenoid valve by-pass
VSI Hot gas injection solenoid valves
LS Liquid separator
VIC Cycle reversing valve
 
1System side
HEAT EXCHANGER
(EVAPORATION)
Cold water production
2Source side
HEAT EXCHANGER
(CONDENSATION)
Heat exchange with air
3Desuperheater side
HEAT EXCHANGER
(CONDENSATION)
Hot water production
H2

H2

H2

H2

4.12. ÷ DESUPERHEATER
CN
EV
FD
VSL1
AL
LS
VSB
VIE1
ECO
DES DES
VT
IDL
VIC VIC
VU
VU
VU
VU
CN
FD
VSL1
AL
LS
VSB
VT
IDL
VU
VU
VU VU
CP
CP
VSI1A
VSI1
CP
CP
VSI1
VSI1A
VIE1A VIE1A
VIE1
ECO
 
1System side
HEAT EXCHANGER
(EVAPORATION)
Cold water production
2Source side
HEAT EXCHANGER
(CONDENSATION)
Heat exchange with air
3Desuperheater side
HEAT EXCHANGER
(CONDENSATION)
Hot water production
1
2
3
2
H2

H2

H2

H2


16 Aermec cod. 5167556_03 17.09
NRK 0200-0700
5. DESCRIPTION OF COMPONENTS
5.1. REFRIGERANT CIRCUIT
SCROLL COMPRESSORS
Rotary air-tight scroll type compressor, with vapour injection and two-pole electric
motor.
All compressors come with casing resistance, electronic thermal protection with
centralised manual resetting and twopole electric motor.
COOLING/HEATING EXCHANGER SYSTEM SIDE
Braze welded AISI 316 steel plate heat exchanger, insulated externally with closed cell
neoprene anticondensation material. When the unit is not running, it is protected
against formation of ice inside by an electric resistance.
5.1.1. WATER FEATURES
System: Chiller with plate heat exchanger
PH 7,5-9
Electric conductivity 100-500μS/cm
Total hardness 4,5-8,5 dH
Temperature < 65°C
Oxygen content < 0,1 ppm
Max. glycol amount 50%
Phosphates (PO4) < 2ppm
Manganese (Mn) < 0,05 ppm
Iron (Fe) < 0,3 ppm
Alkalinity (HCO3) 70 - 300 ppm
Chloride ions (Cl-) < 50 ppm
Sulphate ions (SO4) < 50 ppm
Sulphide ion (S) none
Ammonium ions (NH4) none
Silica (SiO2) < 30ppm
SOURCE SIDE HEAT EXCHANGER
Finned pack heat exchanger made with copper pipes
and aluminium fins adequately spaced to ensure better
heat exchange performance.
EXCHANGER SYSTEM SIDE
Braze welded AISI 316 steel plate heat exchanger, insulated externally with closed cell
neoprene anti-condensation material. When the unit is not running, it is protected
against formation of ice inside by an electric resistance.
ECONOMIZER
Circuito economizzatore con scambiatore a piastre (AISI 316); consente di aumentare
le prestazioni soprattutto agli elevati rapporti di compressione, ad esempio in caso di
basse temperature esterne nel funzionamento invernale.
CYCLE REVERSING VALVE
4-way cycle reversing valve. Inverts the flow of refrigerant gas.
LIQUID STORAGE TANK
(always passed by)
Compensates the difference in volume between finned coil and plate exchanger,
retaining 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.
NON-RETURN VALVES
Allows one-way flow of the refrigerant.
THERMOSTATIC VALVES
Mechanical valves, with external equaliser positioned at evaporator outlet, modulates
the flow of gas to the evaporator, depending on the heat load, in order to ensure a
correct heating level of the intake gas.
SOLENOID VALVES
The valve closes when the compressor switches off, blocking the flow of refrigerant
gas to the evaporator, recovery and the coil.
LIQUID SEPARATOR
Positioned on compressor intake for protection
against any return of refrigerant fluid, flooded start-up and functioning in the presen-
ce of liquids.
INDICATOR FOR LIQUID
Used to check presence of humidity in cooling circuit.
5.2. STRUCTURE AND FANS
SUPPORT STRUCTURE
Structure made of hot-dipped galvanised steel sheets, painted with polyester
powders, built to guarantee easy accessibility for service and maintenance.
STANDARD FANS
Axial fans with IP 54 degree of protection, external rotor, helical blades, housed in
nozzles, complete with accident-prevention protective screen. 6-pole electric motor
with built-in circuit breaker.
They are equipped as standard with condensation check via a device that continu-
ously adjusts the fans' speed.
LARGER FANS
Offer a useful head to avoid pressure drops
of the aeraulic system if the fans need to be channelled.
LARGER INVERTER FANS
(available only from size 0500 to 0700).
5.3. STANDARD HYDRAULIC CIRCUIT
WATER FILTERS
Equipped with steel filtering mesh, prevents the heat exchangers both of the system
side and the DHW/heating system side from clogging.
FLOW SWITCHES
They have the task of controlling that there is water circulation inside the heat
exchangers; if this is not the case, they block the unit.
AIR VENT VALVE
Mounted on the top of the hydraulic system; they discharge possible air pockets.
5.3.1. COMPONENTS OF HYDRAULIC CIRCUIT IN CONFIGURABLE VERSIONS
PUMPS
High or low static pressure.
It is possible to request a second pump to operate in standby for the first (twin
pumps) with high or low pressure levels. The pumps work in programmed rotation
and, in the event of a fault on the operating pump, switch-over is automatic.
EXPANSION VESSEL
With nitrogen pre-load membrane.
SAFETY VALVE
Equipped with a piped discharger, intervenes by discharging the over pressure in case
of anomalous pressures.
SYSTEM BUFFER TANK
Made of steel to reduce heat loss and to eliminate the formation of condensation,
insulated by thick polyurethane.
Supplied as per standard with 300W electric anti-freeze resistance (as low as -20°C
outside temperature - 5°C tank water temperature) controlled by anti-freeze probe
inserted in tank.
5.4. SAFETY AND CONTROL COMPONENTS

17Aermec cod. 5167556_03 17.09
NRK 0200-0700
MANUALLY RESET HIGH PRESSURE SWITCH
With fixed calibration, placed on high pressure side of cooling circuit, inhibits
functioning of compressor if abnormal work pressure occurs.
LOW PRESSURE TRANSDUCER
Placed on the low pressure side of the cooling circuit, it signals the work pressure to
the control board generating a pre-warning in the case of anomalous pressures.
HIGH PRESSURE TRANSDUCER
Placed on the high pressure side of the cooling circuit, it signals the work pressure to
the control board generating a pre-warning in the case of anomalous pressures.
DCPX CONDENSATION PRESSURE CONTROLLER
This accessory allows correct functioning with external temperatures lower than 10°C
and as low as – 10°C.
It consists of an adjustment circuit board that varies the number of fan revs according
to the condensation pressure read by the high pressure transducer, in order to keep it
sufficiently high for correct unit functioning.
It also allows correct functioning in heating mode with external temperatures
exceeding 30°C and up to 42°C.
5.5. ELECTRIC CONTROL
AND POWER BOARD
Electric board in compliance with standards EN 60204-1/IEC 204-1, complete with:
- transformer for the control circuit,
- 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,
- electronic controller,
- evaporator pump and recovery pump control consent relay (only for versions
without pump units),
- all numbered cables.

The electric control board can be accessed by removing the voltage. Act on the
opening lever of the control board itself. This lever can be locked using one or more
padlocks during maintenance interventions to prevent the machine being powered
up accidentally.
CONTROL KEYPAD
Micro-processor control system is the new function dedicated to the heat pumps with
integrated logic for high temperature hot water production.
Beside the control buttons, the keyboard features an LCD display which allows to
consult and adjust the unit with a multilevel menu and language option setting. It
controls:
• The temperature used by the system for environment heating and cooling, but
also the temperature of the water if it is used as domestic hot water. The man-
agement of the various temperatures is carried out automatically based on the
operating conditions of the machine and external inputs.
• Alarm management and log in order to always have a punctual diagnosis of the
unit operation.
• Creation of operating time intervals, necessary for an efficient programming
• For defrosting, a self-adapting logic is used, which allows the adjustment of
defrosting frequency for the benefit of efficiency.
• The unit can be supervised with...
• A dedicated keyboard for wall mounting (PGD1 accessory), which allows remote
control of all functions.
• 

18 Aermec cod. 5167556_03 17.09
NRK 0200-0700
6. ACCESSORIES
• AER485P1 RS-485 interface for supervising systems
with MODBUS protocol.
• AERNET :The device allows the control, the
management and the remote monitoring of a Chiller
with a PC, smartphone or tablet using Cloud
connection. AERNET works as Master while every
unit connected is configured as Slave (max. 6 unit);
also, with a simple click is possible to save a log file
with all the connected unit datas in the personal
terminal for post analysis.
• PGD1: Graphical display, which allows complete
management of the unit like the one on board the
machine. Can be controlled up to 50 m away with a
telephone cable, 200 m with a shielded AWG 24
cable
• C-TOUCH: Microprocessor adjustment, complete
with a 7" touch screen keyboard, which allows to
navi-gate intuitively among the various screens,
allowing to modify the operating parameters and
graphically view the progress of some variables in
real time.
•MULTICHILLER_PCO: 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.
• GP: PROTECTION GRIDS
Protect the external coil from blows and prevent
access to the underlying area where the
compressors and the chiller circuit are housed.
Every kit includes two grids.
• VT ANTI-VIBRATION MOUNTS
Group of anti-vibration mounts

• DRE: Electronic soft starter which reduces starting
current.
• RIF: Power factor correction. Connected in parallel
to the motor allowing about 10% reduction of input
current.
• PRM1: It is a manual pressure switch electrically
wired in series with the existing automatic high
pressure switch on the compressor discharge pipe.
• COMPATIBILITY with the VMF SYSTEM For
more information on the system refer to
the manual.
Mod. NRK Vers. 0200 0280 0300 0330 0350 0500 0550 0600 0650 0700
AER485P1 All ••••••••••
AERNET All ••••••••••
PGD1 All ••••••••••
C-TOUCH All ••••••••••
MULTICHILLER_PCO All ••••••••••
GP (1) All ••••••••••
VT (00) All 3 3 4 4 2(x2) 2(x2) 2(x2) 2(x2) 2(x3) 2(x3)
VT (-P1-P2-P3-P4) 17 17 17 17
11 11 11 11
22 22
VT (01-02-03-04-05-06-07-08-09-10) All 17 17 17 17 22 22
13 13 13 13 22 22
Accessories factory fitted only
DRE All 201 281 301 331 351 501 551 601 651 701
RIF All 55 56 54 57 65 58 59 60 61 61
PRM1 All ••••••••••
(1) (x2)(x3) the number in brackets indicates the quantity to order

19Aermec cod. 5167556_03 17.09
NRK 0200-0700
7. TECHNICAL DATA
 0200 0280 0300 0330 0350 0500 0550 0600 0650 0700

Cooling capacity HA kW - - - - 75 89 101 117 133 148
HE kW 36 50 59 66 74 87 100 114 131 145
Total input power HA kW - - - - 25,4 29,6 34,5 41,1 45,0 52,6
HE kW 11,7 17,5 19,6 22,4 27,7 32,5 38,1 45,8 49,5 58,1
EER HA W/W - - - - 2,96 3,00 2,94 2,85 2,96 2,81
HE W/W 3,03 2,88 3,03 2,95 2,68 2,69 2,61 2,49 2,64 2,50
Water flow rate HA l/h - - - - 12981 15275 17485 20208 22972 25512
HE l/h 6130 8668 10234 11377 12799 15032 17172 19710 22509 25028
Total pressure drop HA kPa - - - - 23 26 32 28 34 42
HE kPa 18 17 23 19 22 25 30 27 32 41
Useful head
low head pump
HA kPa - - - - 100 137 114 107 134 106
HE kPa 100 137 114 107 134 106 117 112 139 112
Useful head
High head pump
HA kPa - - - - 139 175 153 200 183 161
HE kPa 178 149 152 137 141 177 156 204 188 166

Heating capacity HA/HE kW 42 60 70 78 88 104 119 137 156 175
Total input power HA/HE kW 12,1 17,1 20,0 22,5 25,5 30,2 34,7 39,9 45,6 51,7
COP HA/HE W/W 3,49 3,49 3,48 3,48 3,45 3,44 3,43 3,43 3,42 3,38
Water flow rate HA/HE l/h 7173 10056 11738 13060 15506 18160 20577 23211 26704 29661
Total pressure drop HA/HE kPa 24 22 30 25 32 36 44 37 45 57
Useful head
low head pump HA/HE kPa 128 93 97 79 81 115 85 77 97 55
Useful head
High head pump HA/HE kPa 167 132 137 118 121 155 127 170 149 116

Pdesignh  HA / / / / 89 106 121 137 157 178
SCOP  HA / / / / 2,88 2,90 3,03 3,03 2,93 2,90
s HA / / / / 112 113 118 118 114 113
Performance under average climatic conditions (Average)
Pdesignh  HE 44 62 70 / / / / / / /
SCOP  HE 3,08 3,03 3,00 / / / / / / /
s HE 120 118 117 / / / / / / /
Efficiency Energy Class  HE A+ A+ A+ / / / / / / /
Pdesignh  HE 42 58 67 80 89 106 121 137 157 178
SCOP  HE 3,88 3,75 3,70 3,03 2,88 2,90 3,03 3,03 2,93 2,90
s HE 152 147 145 118 112 113 118 118 114 113
Efficiency Energy Class  HE A++ A+ A+ / / / / / / /

Recovery heating capacity  HA/HE kW 20 26 29 32 40 46 49 58 70 77
Water flow rate HA/HE l/h 3500 4540 5074 5606 6935 8000 8442 9948 12031 13250
Total pressure drop  HA/HE kPa 10 17 22 27 15 20 23 30 23 29
GRADO DI PROTEZIONE
IP 24 24 24 24 24 24 24 24 24 24
ELECTRICAL DATA 
Power supply  400V/3N/50Hz ± 10
Total input current
in cooling mode
HA - - - - 55 61 66 72 86 107
HE 28 38 42 49 60 67 73 80 95 119
Total input current
in heating mode
HA/HE 24 34 38 44 54 59 64 70 85 106
Maximum current (FLA) tutte A 40 49 61 74 75 85 94 114 144 147
Starting current (LRA) tutte A 124 146 175 215 216 226 191 228 285 288
COMPRESSORS
Compressor type scroll scroll scroll scroll scroll scroll scroll scroll scroll scroll
n°2222234444
Circuit n° 2 2 2 2 2 2 2 2 2 2
Capacity control
C1 % 50 50 50 50 50 28,3 25 25 25 25
% - - - - - 28,3 25 25 25 25
C2 % 50 50 50 50 50 43,4 25 25 25 25
% - - - - - - 25 25 25 25

Evaporator water temperature (in/out) 12°C/7°C; External air temperature 35°C

Condenser water temperature (in/out) 40°C/45°C; External air temperature 7°C b.s./6°C b.u.

Evaporator water temperature (in/out) 12°C/7°C; External air temperature 35°C; Desuperheater
water temperature (in/out) 40°C/45°C
(1) The data is comprehensive (take into account both circuits)
(2) Unit standard versions without hydronic module integrated
- not supply
(3) Efficiencies for average temperature Applications (55°C)
(4) Efficiencies for low temperature Applications (35°C)


20 Aermec cod. 5167556_03 17.09
NRK 0200-0700
 0200 0280 0300 0330 0350 0500 0550 0600 0650 0700
Refrigerant
type R410A R410A R410A R410A R410A R410A R410A R410A R410A R410A
C1 kg 6,8 7,8 8,2 8,2 11,5 14,5 14,5 14,5 19,5 20
C2 kg 6,8 7,8 8,2 8,2 11,5 14 14,5 14,5 19,5 20
Oil type POE 160 SZ
kg 3,62 6,5 6,5 6,5 6,5 9,75 13 13 13 13
EXCHANGER SYSTEM SIDE
Exchanger type plate plate plate plate plate plate plate plate plate plate
n°1111111111
dm36,5 6,5 8,4 8,4 10,8 10,8 15,6 15,6 18 18
Hydraulic connections (in/out) Victaulic ø 2”1/2 2”1/2 2”1/2 2”1/2 2”1/2 2”1/2 2”1/2 2”1/2 2”1/2 2”1/2
DESUPERHEATER RECOVERY SIDE HEAT EXCHANGERS 
Exchanger type plate plate plate plate plate plate plate plate plate plate
n°2222222222
dm34,8 4,8 4,8 4,8 8,2 10,5 10,5 10,5 19 19
Hydraulic connections (in/out)  Victaulic ø
HYDRONIC MODULE SYSTEM SIDE
BUFFER TANK
Buffer tank l 300 300 300 300 500 500 500 500 500 500
Electric heater n°/W 1/300 1/300 1/300 1/300 1/300 1/300 1/300 1/300 1/300 1/300
LOW HEAD PUMP (P1-P2)
Input power (nom.) kW 1,1 1,1 1,1 1,1 1,1 1,5 1,5 1,5 1,9 1,9
Input current (max.) A 2,45 2,45 2,51 2,51 2,51 3,41 3,41 3,41 4,53 4,53
HIGH HEAD PUMP (P3-P4)
Input power (nom.) kW 1,5 1,5 1,5 1,5 1,5 1,9 1,9 3,0 3,0 3,0
Input current (max.) A 3,08 3,08 3,41 3,41 3,41 4,53 4,53 5,86 5,86 5,86
EXPANSION VESSEL
Expansion vessel n°1111111111
l 24 24 24 24 24 24 24 24 24 24
SAFETY VALVE 
Safety valve n°/bar 1/6 1/6 1/6 1/6 1/6 1/6 1/6 1/6 1/6 1/6
STANDARD FANS AXIAL
fans type Inverter Inverter Inverter Inverter On/Off On/Off On/Off On/Off On/Off On/Off
n°4688222233
Air flow rate cooling mode HA m3/h - - - - 37000 36500 36500 36500 58000 58000
HE m3/h 14000 20000 26000 26000 21100 21400 22400 22400 31900 31900
Air flow rate heating mode HA/HE m3/h 14000 20000 26000 26000 37000 36500 36500 36500 58000 58000
Input power kW
---- 3,4 3,4 3,4 3,4 3,4 5,1
Input current A
---- 7,2 7,2 7,2 7,2 7,2 10,8
INVERTER FANS
High static pressure Pa - - - - 80 80 80 80 80 80
SOUND DATA

Sound power HA dB(A) - - - - 82 82 82 83 85 85
HE dB(A) 74 74 75 75 74 74 74 75 77 77
Sound pressure HA dB(A) - - - - 50 50 50 51 53 53
HE dB(A) 42 42 43 43 42 42 42 43 45 45
 
Sound power HA/HE dB(A) 74 74 75 75 82 82 82 83 85 85
Sound pressure HA/HE dB(A)
42 42 43 43
50 50 50 51 53 53
DIMENSIONS
Height mm 1606 1606 1606 1606 1875 1875 1875 1875 1875 1875
Width mm 1100 1100 1100 1100 1100 1100 1100 1100 1100 1100
Depth mm 2700 2700 3250 3250 3330 3330 3330 3330 4330 4330
Weight when empty  804 876 960 967 1118 1264 1325 1367 1562 1597
(2) Unit standard versions without hydronic module integrated
(3) The desuperheater are connected by a hydraulic collector
(4) Cooling mode – The ‘HE’ version is low noise with temperature 12/7°C -35°C Heating mode – The ‘HE’ version is low noise witth temperature > 25°

Aermec determines sound power values on the basis of measurements made in accordance with UNI EN ISO 9614-2, as required for Eurovent certification.

Sound pressure in free field, at 10 m distance from the external surface of the unit (in accordance with UNI EN ISO 3744
Nota: Per maggiori informazioni fare riferimento al programma di selezione Magellano o alla documentazione tecnica disponibile sul sito www.aermec.com