EN

Technical Manual

TRANSLATION FROM ORIGINAL

NRK60HZ. 18.05. 5167558_01

PUMP KIT WATER TANKCERTIFICATION 60Hz LOWNOISE VERSION

REFRIGERANT GAS

NETWORK OPERATION

COOLING AND HEATING

MODBUS COMPATIBLE

SCROLL COMPRESSOR

AXIAL FAN INTERNET CONNECTIONS

PLATE EXCHANGER

FOR TWO PIPES PLANTS

HEAT RECOVERY

• AIR COOLED REVERSIBLE HEAT PUMP• PRODUCTION OF HOT WATER UP TO 149°F• OPTIMIZED FOR OPERATION IN HEATING MODE• HEATING OPERATION WITH EXTERNAL TEMPERATURES DOWN TO -4°F• OPTION VERSION WITH BUILT-IN HYDRONIC KIT

NRK

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

PRODUCT DESCRIPTION .................................................................................................................................. 5

CONFIGURATOR ................................................................................................................................................ 6

DESCRIPTION OF COMPONENTS ..................................................................................................................... 7

HYDRAULIC CIRCUIT ......................................................................................................................................... 7

ADDITIONAL COMPONENTS OF THE CONFIGURATOR .................................................................................. 7

CHECK LIST ........................................................................................................................................................ 9

COOLING CIRCUITS ......................................................................................................................................... 10

HYDRAULIC CIRCUIT ....................................................................................................................................... 11

ACCESSORIES .................................................................................................................................................. 14

ACCESSORIES COMPATIBILITY ....................................................................................................................... 15

OPERATING RANGE ........................................................................................................................................ 16

PERFORMANCE SPECIFICATIONS .................................................................................................................. 17

GENERAL SPECIFICATIONS ............................................................................................................................. 18

DIMENSIONS AND WEIGHTS ......................................................................................................................... 20

PRESSURE DROPS ........................................................................................................................................... 21

USEFUL STATIC PRESSURES ............................................................................................................................ 22

LOW USEFUL HEADS ....................................................................................................................................... 22

HIGH USEFUL HEADS ...................................................................................................................................... 22

WATER SYSTEM CONTENT ............................................................................................................................. 23

CORRECTIVE FACTORS.................................................................................................................................... 23

GLYCOL ............................................................................................................................................................. 24

DIRT ............................................................................................................................................................... 25

SOUND DATA ................................................................................................................................................... 26

MINIMUM TECHNICAL SPACES ..................................................................................................................... 27 EXPANSION TANK PRESSURE SETTING ........................................................................................................ 28

5NRK60HZ. 17.06. 5167558_00

PRODUCT DESCRIPTION

NRK is a dual-circuit heat pump charged with R410A gas and optimised for heating. It has axial fans to ensure the quietest possible machine operation, scroll compressors with a high yield and low electricity absorption and steam injection, a plate heat exchanger and finned pack copper/aluminium coils. The machine cools/heats water to supply the distribution system that is usually connected to fan coil type terminals or to a low-temperature radiant system. In addition, NRK can also produce domestic hot water if it is fitted with a desuperheater or total recovery system, so it’s ideal for residential and commercial contexts, especially the replacement of centralised boilers during the requalification of buildings.

VersionsNRK_H_A High efficiency

Maximum reliabilityMulti-circuit unit designed to provide the maximumefficiency both with full load and partial loads,guaranteeing operating continuity should one of thecircuits stop to facilitate maintenance.Having several compressors and circuits ensurescontrol of more steps of power yielded in both modes.

Renewable Energy for the redevelopment of the environmentsThese 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. Integrated hydronic kitTo 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 configurations with single pump or with reserve pump, with low or high head and accumulator. (see configurator)

Model with partial heat recovery (desuperheater) 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.

PRODUCT IDENTIFICATION

The units can be identified through:

PACKING LABEL - that reports the identification data of the product.

TECHNICAL PLATE

NRK 0150 NRK 0300 NRK 0330-0350-0550 NRK 0600-0650-0700

6 NRK60HZ. 17.06. 5167558_00

CONFIGURATOR

NAME NRK

SIZE 0150 - 0300 - 0330 - 0350 - 0550 - 0600 - 0650 - 0700

THERMOSTATIC VALVE

° Mechanical, standard operations (produced water down to +4°C/39.2°F)

MODELS

H Reversible heat pump

HEATHING RECOVERY

° Without recovery

D With desuperheater

VERSION

A High efficiency

COILS

° Alluminium

R Copper

S Copper tin plated

V Epoxy coated

FANS

° AC Type (Only for NRK 0150)

J Inverter fan

POWER SUPPLY

7 460/3/60Hz with magnetic circuit breakers

HYDRONIC KIT

00 Without hydronic kit

01 With storage tank and single low head pump

02 With storage tank and twin low head pumps (duty + standby)

03 With storage tank and single high head pump

04 With storage tank and twin high head pumps (duty + standby)

P1 With single low head pump

P2 With twin low head pumps (duty + standby)

P3 With single high head pump

P4 With twin high head pumps (duty + standby)

NRK 0150 0300 0330 0350 0550 0600 0650 0700

00 • • • • • • • •

01 • • • • • • • •

02 n.a. • • • • • • •

03 • • • • • • • •

04 n.a. • • • • • • •

P1 • • • • • • • •

P2 n.a. • • • • • • •

P3 • • • • • • • •

P4 n.a. • • • • • • •

7NRK60HZ. 17.06. 5167558_00

DESCRIPTION OF COMPONENTS

REFRIGERANT CIRCUIT

COMPRESSORSScroll hermetic compressors, assembled on anti-vibration elastic supports with 2-pole electric motors.

SYSTEM SIDE HEAT EXCHANGERBraze welded AISI 316 steel plate heat exchanger. The heat exchanger is insulated externally with closed cell neoprene anti-condensation material.Fitted as standard with an electric anti-freeze resistor.

SOURCE SIDE HEAT EXCHANGERFinned pack heat exchanger made with copper pipes and aluminium fins adequately spaced to ensure high-efficiency.

CYCLE REVERSING VALVE4-way cycle reversing valve. Inverts the flow of refrigerant gas.

DEHYDRATOR FILTERHermetic with cartridge made of ceramic and hygroscopic material, able to withhold impurities and any traces of humidity present in the cooling circuit.

THERMOSTATIC VALVE (STANDARD °)Mechanical valve, with external equaliser positioned at evaporator outlet, modulates the flow of gas to the evaporator, according to the heat load, in order to ensure a correct heating level of the intake gas.

SOLENOID VALVEThe valve closes when the compressor switches off, blocking the flow of refrigerant gas to the evaporator.

ONE-WAY VALVEThey allow one-way flow of the refrigerant.

STRUCTURE AND FANS

STRUCTURESupporting structure made of hot-dipped galvanised steel sheets, painted with polyester powders, built to guarantee easy accessibility for service and maintenance.

FAN UNITAxial 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 continuously adjusts the fans’ speed.

HYDRAULIC CIRCUIT

WATER FILTERSEquipped 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.

DRAIN VALVE

IDRAULIC SAFETY VALVE (ONLY STORAGE TANK CONFIGURATION)

ADDITIONAL COMPONENTS OF THE CONFIGURATOR

PUMPOffers static pressure useful to system, excluding the unit pressure drops the unit.

EXPANSION VESSELWith membrane expansion tank with nitrogen pre-charge (for capacity see technical data).

SYSTEM STORAGE TANK It is required to reduce the number of peaks of the compressor and to even the temperature of water to be sent to the system. Made of steel to reduce heat loss and to eliminate the formation of condensation, it is insulated by thick polyurethane.

SAFETY AND CONTROL COMPONENTS

COOLING CIRCUIT SAFETY VALVESThey intervene by discharging the overpressure in case of anomalous pressures. Calibrated at 30 bar on HP branch.

HIGH PRESSURE PRESSURE SWITCHWith fixed calibration, placed on the high pressure side of the cooling circuit, it inhibits the operation of the compressor if abnormal work pressure occurs.

LOW PRESSURE TRANSDUCERAllows displaying, on the microprocessor board display, the value of the compressor’s suction pressure (one per circuit) on the low-pressure side of the cooling circuit.

HIGH PRESSURE TRANSDUCERPlaced on the high pressure side of the cooling circuit, signals the work pressure to control board, generating a pre-warning in case abnormal pressure occurs.

8 NRK60HZ. 17.06. 5167558_00

ELECTRONIC MODU CONTROL

Temperature control of the output water with proportional-integral algorithm: maintains the average outlet temperature at the set value.− Self-adaptive activation differential: ensures minimum operation

times of the compressor in systems with low water content.− Set-point compensation with external temperature (with

external air probe accessory): reduces energy consumption.− Automatic reset pre-alarm: in case of alarm, a determined

number of re-starts is allowed before the definitive block.− Alarm on ∆T: to identify wiring errors (reverse rotation) or

blocked cycle reversing valve.− Compressor operation hours count.− Compressor peak count.− Alarm log.− Autostart after voltage drop.− Local or remote control.

Display of the state of the unit:1. Voltage presence2. Compressor ON/OFF3. Operation mode (hot/cold)4. Alarm active

Probes, transducers and parameter display1. Water outlet2. Water inlet3. Pressing line gas temperature4. Intake pressure optional5. Set-point temperature error (sum of the proportional and

integral error)6. Stand-by times for start-up/switch-off of the compressor7. Alarm/pre-alarm management8. Low pressure9. High pressure10. High discharge temperature11. Anti-freeze12. Flow switch13. Allarm on the ∆T14. Compressor magnet circuit breaker15. Probe failure alarm

− Pre-alarms with automatic reset with limited number of re-starts before blocking.

− ON/OFF external contact.− Change season from external contact.

For further information refer to the user manual.

ELECTRONIC pCO5

Microprocessor boardIt consists of a management and control board and of a display board.

Functions:• compressor start-up delay• compressor sequence rotation• compressor operation hours count• start/stop• reset• alarm permanent memory• auto-start after voltage drop• multilingual messaging• operation with local or remote control (PGD1 accessory)

Machine condition display• compressors ON/OFF• alarm summary

Alarms management• high pressure• flow switch• low pressure• anti-freeze • compressor overload• fan overload• pump overload;

Display of the following parameters• water inlet temperature• water outlet temperature• delta T• high pressure• low pressure• restart time• alarms display

Settingsa) without password:• cold set• total differentiala) with password:• anti-freeze set• low pressure exclusion time• display language• Access code

For further information, refer to the user manual.

REGULATION FOR NRK 0150 REGULATION FOR NRK 0300-0330-0350-0550-0600-0650-0700

9NRK60HZ. 17.06. 5167558_00

CHECK LIST

STANDARD COMPONENTS - COOLING CIRCUIT 0150 0300 0330 0350 0550 0600 0650 0700

High pressure transducer 1 2 2 2 2 2 2 2High pressure switch 1 2 2 2 2 2 2 2Low pressure switch - - - - - - - -Low pressure transducer 1 2 2 2 2 2 2 2Cycle reversing valve 1 2 2 2 2 2 2 2Dehydrator filter 1 2 2 2 2 2 2 2Liquid storage tank 1 2 2 2 2 2 2 2Liquid separator 1 2 2 2 2 2 2 2Thermostatic valve MechanicalOne-way valve 8 8 8 8 8 8 8 8Cooling circuit safety valve High Pressure - - - - - - - -Cooling circuit safety valve Low Pressure (30bar) 1 2 2 2 2 2 2 2Shut-off valve - - - - - - - -Solenoid valve - 2 2 2 2 2 2 2Economizer 1 2 2 2 2 2 2 2

STANDARD COMPONENTS - HYDRAULIC CIRCUIT

VERSION 00Flow switch 1 1 1 1 1 1 1 1Differential pressure switch - - - - - - - -Water filter 1 1 1 1 1 1 1 1Air vent valve 1 1 1 1 1 1 1 1Water safety valve - - - - - - - -Inlet water probe 1 1 1 1 1 1 1 1Outlet water probe 1 1 1 1 1 1 1 1Water drain tap - 1 1 1 1 1 1 1Loading unit - - - - - - - -

VERSION P1-P2-P3-P4Flow switch 1 1 1 1 1 1 1 1Differential pressure switch - - - - - - - -Water filter 1 1 1 1 1 1 1 1Air vent valve 1 1 1 1 1 1 1 1Water safety valve - - - - - - - -Inlet water probe 1 1 1 1 1 1 1 1Outlet water probe 1 1 1 1 1 1 1 1Drain tap 1 1 1 1 1 1 1 1Loading unit - - - - - - - -Pump • • • • • • • •Expansion vessel - n°/bar 1 / 3.5 1 / 2 1 / 2 1 / 2 1 / 2 1 / 2 1 / 2 1 / 2

VERSION 01-02-03-04Flow switch 1 1 1 1 1 1 1 1Differential pressure switch - - - - - - - -Water filter 1 1 1 1 1 1 1 1Air vent valve 1 1 1 1 1 1 1 1Water safety valve 1 1 1 1 1 1 1 -Inlet water probe 1 1 1 1 1 1 1 1Outlet water probe 1 1 1 1 1 1 1 1Drain tap 1 1 1 1 1 1 1 1Loading unit - - - - - - - -Pump • • • • • • • •Expansion vessel - n°/bar 1 / 3.5 1 / 2 1 / 2 1 / 2 1 / 2 1 / 2 1 / 2 1 / 2Storage tank • • • • • • • •Antifreeze heater

- : Not Available• : Available

10 NRK60HZ. 17.06. 5167558_00

COOLING CIRCUITS

NRK 150

KEYAP High pressure switchBPAL Finned coilCP CompressorF Dehydrator filterIL Liquid indicatorSIW Inlet water probeSP Plate heat exchangerSUW Outlet water probeTAP High pressure TRANSDUCERTBP Low pressure transducerVT Thermostatic valveVSL Solenoid valveVU One-way valveSEP Liquid separatorVIC Cycle reversing valveAL Liquid storage tankSGP Pressing line gas probe

11NRK60HZ. 17.06. 5167558_00

HYDRAULIC CIRCUIT WARNING

The selection and installation of the components outside the appliance is assigned, due to his competence, to the installer who will have to operate according to the rules of good practice and in compliance with the regulations in force in the country of destination. The hydraulic piping for connection to the appliance must be properly scaled for the actual water flow rate required by the system when operating. The water flow rate to the heat exchanger must always be constant. Clean the system carefully before connecting the unit. This is done in order to eliminate possible residues such as welding spatter, waste, rust or any other impurity from the pipes. These substances could deposit inside and cause the appliance to malfunction. The connection pipes must be properly supported so as not to burden the appliance with their weight. SYSTEM DRAININGIf the system is shut down during the winter, the water in the heat exchanger could freeze, causing irreparable damage to the exchanger itself.To avoid the risk of freezing, there are three possible solutions:1. Completely drain the water from the

appliance.2. Operation with glycol water, with a glycol

percentage chosen on the basis of the minimum external temperature envisaged.

3. Use of heaters. In this case the heaters must always be powered for the entire winter period (machine in standby).

WARNINGObligatory components (NOT SUPPLIED) that are the responsibility of the installer

• WATER FILTERThe water filter allows any impurities in the hydraulic circuits to be blocked and eliminated; impurities that could reach the heat exchanger and damage it.It is ‘ OBLIGATORY to install the water filter (not supplied) at a maximum of 1 m from the cooling water inlet fitting.The filter must have at least the diameter of the units fittings.

• FLOW SWITCHThe flow switch has the task of making sure that water is circulating in the unit.If this is not the case, it shuts down the unit.The unit does not start if the flow switch is not wired to the panel and should be calibrated at 50% of the nominal capacity

Aermec will not be responsible for any damage to the heat exchanger if there is no water filter or flow switch

Characteristics of the waterSystem: Chiller with plate heat exchangerPH 7.5-9Electrical conductivity 100-500μS/cmTotal hardness 4.5-8.5 dHExternal air < 65°COxygen content < 0.1 ppmMaximum glycol content 0.5Phosphates (PO4) < 2ppmManganese (Mn) < 0.05 ppmIron (Fe) < 0.3 ppmAlkalinity (HCO3) 70 - 300 ppmChlorine ions (Cl-) < 50 ppmSulphate ions (SO4) < 50 ppmSulphide ion (S) noneAmmonium ions (NH4) noneSilica (SiO2) < 30ppm

VERSION 00

1

36 7

5

5

6 12 772

1313 13

4

10

11

849

14

15

NRK 60Hz 0300 ÷ 0700 [00]

COMPONENTS SUPPLIED AS PER STANDARD

1 - Plate exchanger2 - Water filter3 - Fow switch4 - Air vent valve5 - Water temperature probes (in/out)13 - Drain valve *(not supplied for NRK 0150)

RECOMMENDED COMPONENTS NOT SUPPLIED FOR WHICH INSTALLER IS RESPONSIBLE

4 - Air vent valve6 - Anti-vibration joints7 - Cut-off valve8 - Safety valve9 - Expansion Tank10 - System buffer tank (installation recommended whenever the system water content is less than that indicated in tab.)11 - Antifreeze electric heater12 - Pump13 - Drain valve14 - Gauge15 - Automatic fill point

12 NRK60HZ. 17.06. 5167558_00

WARNING

The selection and installation of the components outside the appliance is assigned, due to his competence, to the installer who will have to operate according to the rules of good practice and in compliance with the regulations in force in the country of destination. The hydraulic piping for connection to the appliance must be properly scaled for the actual water flow rate required by the system when operating. The water flow rate to the heat exchanger must always be constant. Clean the system carefully before connecting the unit. This is done in order to eliminate possible residues such as welding spatter, waste, rust or any other impurity from the pipes. These substances could deposit inside and cause the appliance to malfunction. The connection pipes must be properly supported so as not to burden the appliance with their weight. SYSTEM DRAININGIf the system is shut down during the winter, the water in the heat exchanger could freeze, causing irreparable damage to the exchanger itself.To avoid the risk of freezing, there are three possible solutions:1. Completely drain the water from the

appliance.2. Operation with glycol water, with a glycol

percentage chosen on the basis of the minimum external temperature envisaged.

3. Use of heaters. In this case the heaters must always be powered for the entire winter period (machine in standby).

WARNINGObligatory components (NOT SUPPLIED) that are the responsibility of the installer

• WATER FILTERThe water filter allows any impurities in the hydraulic circuits to be blocked and eliminated; impurities that could reach the heat exchanger and damage it.It is ‘ OBLIGATORY to install the water filter (not supplied) at a maximum of 1 m from the cooling water inlet fitting.The filter must have at least the diameter of the units fittings.

• FLOW SWITCHThe flow switch has the task of making sure that water is circulating in the unit.If this is not the case, it shuts down the unit.The unit does not start if the flow switch is not wired to the panel and should be calibrated at 50% of the nominal capacity

Aermec will not be responsible for any damage to the heat exchanger if there is no water filter or flow switch

Characteristics of the waterSystem: Chiller with plate heat exchangerPH 7.5-9Electrical conductivity 100-500μS/cmTotal hardness 4.5-8.5 dHExternal air < 65°COxygen content < 0.1 ppmMaximum glycol content 0.5Phosphates (PO4) < 2ppmManganese (Mn) < 0.05 ppmIron (Fe) < 0.3 ppmAlkalinity (HCO3) 70 - 300 ppmChlorine ions (Cl-) < 50 ppmSulphate ions (SO4) < 50 ppmSulphide ion (S) noneAmmonium ions (NH4) noneSilica (SiO2) < 30ppm

VERSION P1-P2-P3-P4

1

5

6 73

5612 77

13 13

49 10

11

849

14

15

NRK 60Hz 0300 ÷ 0700 [P1-P2-P3-P4]

2

COMPONENTS SUPPLIED AS PER STANDARD

1 - Plate exchanger2 - Water filter3 - Fow switch4 - Air vent valve5 - Water temperature probes (in/out)9 - Expansion Tank12 - Pump13 - Drain valve

RECOMMENDED COMPONENTS NOT SUPPLIED FOR WHICH INSTALLER IS RESPONSIBLE4 - Air vent valve6 - Anti-vibration joints7 - Cut-off valve8 - Safety valve9 - Expansion Tank10 - System buffer tank (installation recommended whenever the system water content is less than that indicated in tab.)11 - Antifreeze electric heater13 - Drain valve14 - Gauge15 - Automatic fill point

13NRK60HZ. 17.06. 5167558_00

WARNING

The selection and installation of the components outside the appliance is assigned, due to his competence, to the installer who will have to operate according to the rules of good practice and in compliance with the regulations in force in the country of destination. The hydraulic piping for connection to the appliance must be properly scaled for the actual water flow rate required by the system when operating. The water flow rate to the heat exchanger must always be constant. Clean the system carefully before connecting the unit. This is done in order to eliminate possible residues such as welding spatter, waste, rust or any other impurity from the pipes. These substances could deposit inside and cause the appliance to malfunction. The connection pipes must be properly supported so as not to burden the appliance with their weight. SYSTEM DRAININGIf the system is shut down during the winter, the water in the heat exchanger could freeze, causing irreparable damage to the exchanger itself.To avoid the risk of freezing, there are three possible solutions:1. Completely drain the water from the

appliance.2. Operation with glycol water, with a glycol

percentage chosen on the basis of the minimum external temperature envisaged.

3. Use of heaters. In this case the heaters must always be powered for the entire winter period (machine in standby).

WARNINGObligatory components (NOT SUPPLIED) that are the responsibility of the installer

• WATER FILTERThe water filter allows any impurities in the hydraulic circuits to be blocked and eliminated; impurities that could reach the heat exchanger and damage it.It is ‘ OBLIGATORY to install the water filter (not supplied) at a maximum of 1 m from the cooling water inlet fitting.The filter must have at least the diameter of the units fittings.

• FLOW SWITCHThe flow switch has the task of making sure that water is circulating in the unit.If this is not the case, it shuts down the unit.The unit does not start if the flow switch is not wired to the panel and should be calibrated at 50% of the nominal capacity

Aermec will not be responsible for any damage to the heat exchanger if there is no water filter or flow switch

Characteristics of the waterSystem: Chiller with plate heat exchangerPH 7.5-9Electrical conductivity 100-500μS/cmTotal hardness 4.5-8.5 dHExternal air < 65°COxygen content < 0.1 ppmMaximum glycol content 0.5Phosphates (PO4) < 2ppmManganese (Mn) < 0.05 ppmIron (Fe) < 0.3 ppmAlkalinity (HCO3) 70 - 300 ppmChlorine ions (Cl-) < 50 ppmSulphate ions (SO4) < 50 ppmSulphide ion (S) noneAmmonium ions (NH4) noneSilica (SiO2) < 30ppm

VERSION 01-02-03-04

NRK 0300 ÷ 0700 [01-02-03-04]

1

5

3

5 12 7

13

4

6 7

6 7

1410

11

849

15

2

COMPONENTS SUPPLIED AS PER STANDARD

1 - Plate exchanger2 - Water filter3 - Fow switch4 - Air vent valve5 - Water temperature probes (IN/OUT)7 - Cut-off valve8 - Safety valve *not supplied for NRK 07009 - Expansion Tank10 - System buffer tank (installation recommended whenever the system water content is less than that indicated in tab.)11 - Antifreeze electric heater12 - Pump13 - Drain valve

RECOMMENDED COMPONENTS NOT SUPPLIED FOR WHICH INSTALLER IS RESPONSIBLE

6 - Anti-vibration joints7 - Cut-off valve14 - Gauge15 - Automatic fill point

14 NRK60HZ. 17.06. 5167558_00

ACCESSORIES

AER 485P1RS-485 interface for supervising systems with MODBUS protocol.

AERWEB300ULAERWEB device allows the remote control of a chiller by means of a common PC through Ethernet connection, via a common browser; 4 models available:AERWEB300UL-6: Web server for monitoring and controlling maximum 6 RS485 network devices;AERWEB300UL-18: Web server for monitoring and controlling maximum 18 RS485 network devices;AERWEB300UL-6G: Web server for monitoring and controlling maximum 6 RS485 network devices with integrated GPRS modem;AERWEB300UL-18G: Web server for monitoring and controlling maximum 18 RS485 network devices with integrated GPRS modem;

PGD1Allows you to control the chiller at a distance.

MULTICHILLER_ULControl, switch-on and switch-off system of the single chillers where multiple units are installed in parallel, always ensuring constant flow rate to the evaporators.

VTGroup of anti-vibration supports.

Accessories mounted in the factory:GPkit with anti-intrusion grid for the short side of theunit.

DRENRKPlate peak current reduction electronic device.

RIFNRKCurrent power factor correction. Connected in parallel to the motor, it allows a reduction of the input current (approx. 10%).

RESNRKAnti-freeze electric resistance board.

CRATESpecial wood cover for transport.

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ACCESSORIES COMPATIBILITY

NRK 0150 0300 0330 0350 0550 0600 0650 0700AER485P1 n.a. • • • • • • •AERWEB300UL • • • • • • • •PGD1 n.a. • • • • • • •MULTICHILLER_UL n.a. • • • • • • •

VT00 15 • • • • • • •P1-P4 15 • • • • • • •01-04 15 • • • • • • •

ACCESSORIES MOUNTED IN THE FACTORYGP n.a. 4 2 (x2) 2 (x2) 2 (x2) 2 (x3) 2 (x3) 2 (x3)DRENRK • 03007 03307 35557 35557 60657 60657 07007RIFNRK • 03007 03307 35557 35557 60657 60657 07007RESNRK • 03007 33707 33707 33707 33707 33707 33707CRATE n.a. 02 02 02 02 03 03 03

• Availablen.a. Not available

16 NRK60HZ. 17.06. 5167558_00

OPERATING RANGEThe units, in standard configuration, are not suitable for installation in salty environment. The values indicated in the table refer to the min. and max. limits of the unit. For further information, refer to the tables of yields and consumptions different from the nominal ones. For functioning limits, please refer to the diagrams, valid for ∆T = 41°F.If the unit operates beyond the operational limits, we recommend you first contact our technical-sales service.

OPERATING RANGE - HEATING MODE

OPERATING RANGE - COOLING MODE

Outlet Water Temperature °F

Dry b

ulb

ambi

ent a

ir te

mpe

ratu

re °F

104

°F

°F-10

14

30

50

70

90

110118.4

130

30 39.2 50 60 64.4 70

THERMOSTATIC VALVE °

Outlet Water Temperature °F

Dry b

ulb

ambi

ent a

ir te

mpe

ratu

re °F

°F

-20

20

-4

40

60

80

100107.6

120

50 77 90 110 131 149 170 °F

14

THERMOSTATIC VALVE °

17NRK60HZ. 17.06. 5167558_00

PERFORMANCE SPECIFICATIONS

NRK 0150 0300 0330 0350 0550 0600 0650 0700PERFORMANCE IN COOLING MODECooling capacity ton 8,8 16,1 19,0 21,5 24,0 32,3 36,6 39,7Total input power kW 9,6 20,2 23,7 27,0 29,9 40,3 49,9 58,1EER BTU/W 11,03 9,56 9,62 9,57 9,62 9,63 8,82 8,20IPLV BTU/W 14,92 13,51 13,61 13,42 13,37 13,79 12,74 11,24EER_100% BTU/W 11,03 9,56 9,62 9,57 9,62 9,63 8,82 8,20EER_75% BTU/W 13,39 12,04 12,03 11,94 11,98 12,82 11,83 10,58EER_50% BTU/W 15,83 14,42 14,48 14,29 14,20 14,80 13,66 11,98EER_25% BTU/W 17,21 15,63 16,19 15,68 15,50 13,78 12,76 11,00Water flow rate gpm 21 39 46 52 58 78 88 95

Pressure drop00 p.s.i. 7,8 2,5 2,5 2,5 2,5 2,5 2,5 2,5

P1-P4 p.s.i. 22,9 2,8 2,8 2,8 2,8 2,8 2,8 2,801-04 p.s.i. 22,9 2,8 2,8 2,8 2,8 2,8 2,8 2,8

Protecion rating IP

ELECTRICAL DATA 460V-3-60HzTotal input current - cooling mode A 20 34 38 48 51 64 79 100Total input current - heating mode A 21 34 42 52 54 69 81 101LRA A 134 165 184 222 223 199 234 278MCA A 30 59 57 72 71 88 103 123MOP A 47 76 78 97 96 105 124 148Recom fuse A 45 75 75 90 90 100 110 125

18 NRK60HZ. 17.06. 5167558_00

NRK 0150 0300 0330 0350 0550 0600 0650 0700COMPRESSORSCompressor type Type Scroll Scroll Scroll Scroll Scroll Scroll Scroll ScrollCompressor quantity n° 1 2 2 2 2 4 4 4Circuit n° 1 2 2 2 2 2 2 2

Part load

% 100 50 50 50 50 25 25 25% - 100 100 100 100 50 50 50% - - - - - 75 75 75% - - - - - 100 100 100

REFRIGERANT GASRefigerant gas Type R410A R410A R410A R410A R410A R410A R410A R410ARefrigerant load lbsOILOil Type (POE) gal 160SZ 160SZ 160SZ 160SZ 160SZ 160SZ 160SZ 160SZ

Oil loadC1 gal 0,9 1,8 1,8 1,8 1,8 3,6 3,6 3,6C2 gal - contact us

EXCHANGERExchanger Type Plate Plate Plate Plate Plate Plate Plate PlateQuantity n° 1 1 1 1 1 1 1 1Min. water flow gpm n.d 9 12 16 16 22 22 24Max. water flow gpm 62 263 263 263 263 263 263 263Water content gal 0,5 1,7 2,2 2,9 2,9 3,9 3,9 4,1Crankcase heater n°/W 1/40 1/150 1/150 1/150 1/150 1/150 1/150 1/150HYDRAULIC CONNECTIONSHydraulic connection grooved joints •Hydraulic connection female connector threaded • • • • • • •Hydraulic connection (in/out) ø 1"1/4G 2"1/2US 2"1/2US 2"1/2US 2"1/2US 2"1/2US 2"1/2US 2"1/2US

GENERAL SPECIFICATIONS

19NRK60HZ. 17.06. 5167558_00

NRK 0150 0300 0330 0350 0550 0600 0650 0700FANS (°)Type fans Type AXIAL-FANMotor fans Typeno. of fans n° 2 n.a. n.a. n.a. n.a. n.a. n.a. n.a.Air flow rate cfm 8064 n.a. n.a. n.a. n.a. n.a. n.a. n.a.Available nominal static pressure PaFans total input power kWFans total input current AFANS (J)Type fans Type AXIAL-FANMotor fans Type EC-INVERTERno. of fans n° 2 8 2 2 2 3 3 3Air flow rate cfm 8064 23190 22366 21954 21954 33314 37904 37904Available nominal static pressure PaFans total input power kWFans total input current AHYDRONIC KIT only for configuration with pump

Expansion vasselP1-P2-P3-P4 galP1-P2-P3-P4 n°/bar

HYDRONIC KIT storage tank and pump Storage tank 01-02-03-04 gal

Expansion vassel01-02-03-04 gal01-02-03-04 n°/bar

GENERAL SPECIFICATIONS

Note:n.a.: Not Available

20 NRK60HZ. 17.06. 5167558_00

NRK Hydronic kit 0150 0300 0330 0350 0550 0600 0650 0700DIMENSIONS AND WEIGHTSHeight 00 in 62,3 63,3 73,9 73,9 73,9 73,9 73,9 73,9Width 00 in 34,3 43,3 43,3 43,3 43,3 43,3 43,3 43,3Depth 00 in 72,9 128,1 131,2 131,2 131,2 170,6 170,6 170,6Empty weight 00 lbsRunning weight 00 lbs

Height P1-P2-P3-P4 inWidth P1-P2-P3-P4 inDepth P1-P2-P3-P4 inEmpty weight P1-P2-P3-P4 lbsRunning weight P1-P2-P3-P4 lbs

Height 01-02-03-04 inWidth 01-02-03-04 inDepth 01-02-03-04 inEmpty weight 01-02-03-04 lbsRunning weight 01-02-03-04 lbs

DIMENSIONS AND WEIGHTS

21NRK60HZ. 17.06. 5167558_00

VERSIONS WITHOUT HYDRONIC KIT “00” ONLY PLATE HEAT EXCHANGER

PRESSURE DROPS

0

0 2 4 6 8 12 14 16 18 22 24 26 28 32 34 36 38 39.610 20 30

1000 2000 3000 4000 5000 6000 7000 8000 9000 l/h

gpm

0

20

40

60

80

100

120

140

160kPa

0

23.2

2

4

6

8

10

12

14

16

18

20

22

psi

1 0150

NRK1

0

0 20 40 60 80 100 120 140 160 176

10000 20000 30000 40000 l/h

gpm

0

50

40

30

20

10

kPa

0

7.3

2

3

5

1

4

6

psi

NRK2

3

03000330

4 03505 05506 06007 06508 0700

2 3 4 5 6 7 8

NRK 0150 0300 0330 0350 0550 0600 0650 0700EXCHANGERMin. water flow gpm 10,6 8,6 11,9 15,9 15,9 22,2 22,2 23,8Max. water flow gpm 61,6 263,3 263,3 263,3 263,3 263,3 263,3 263,3

22 NRK60HZ. 17.06. 5167558_00

USEFUL STATIC PRESSURES

LOW USEFUL HEADS

HIGH USEFUL HEADS

0

50

100

150

200

250

300kPa p.s.i.

0

10

20

30

40

43.5

0 5000 10000 15000 20000 25000 30000 35000 l/h

0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 154 gpm

LOW USEFUL HEAD P1-P2-01-02

NRK 0150 P1-01

NRK 0300-0330-0350-0550 P1-P2-01-02

NRK 0600 P1-P2-01-02

NRK 0650-0700 P1-P2-01-02

1

1

2

2

3

3

4

4

HIGH USEFUL HEAD P3-P4-03-04

NRK 0150 P3-03

NRK 0300-0330-0350-0550 P3-P4-03-04

NRK 0600-0650-0700 P3-P4-03-04

1

1

2

2

3

3

0 5000 10000 15000 20000 25000 30000 35000 l/h

0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 154 gpm

0

50

100

150

200

250

300kPa p.s.i.

0

10

20

30

40

43.5

23NRK60HZ. 17.06. 5167558_00

WATER SYSTEM CONTENT

CORRECTIVE FACTORS

Minimum water content in the systemThe minimum water content of the system allows you to limit the switch-ons and offs of the compressor.To calculate it use the formula Pc (kW) X l.

Maximum water content in the systemUnits with the hydronic kit mounted come standard with the expansion vessel, the safety valve, the flow switch and the water filter mounted.The maximum system water content depends on the capacity of the expansion vessel and on the calibration of the safety valve.

Minimum system water content 0280 0300 0330 0350 0550 0600 0650 0675 0750 0800 0900 1000 1100 1250For air conditioning systems l/kW 4For systems with process water l/kW 8

Expansion vessel with hydronic kit 0280 0300 0330 0350 0550 0600 0650 0675 0750 0800 0900 1000 1100 1250Expansion vassel quantity n° 1Expansion vassel capacity gal 6.3Safety valve quantity n° 1Safety valve bar 2

Corrective factors for Average water temperatures different from the nominalSystem side heat exchanger Operation in cooling mode Heating modeAverage water temperatures (°F) 41.0 50.0 59.0 68.0 86.0 104.0 122.0 73.4 82.4 91.4 100.4 109.4 118.4 127.4 136.4Corrective factor 1.02 1 0.98 0.97 0.95 0.93 0.91 1.04 1.03 1.02 1.01 1 0.99 0.98 0.97

24 NRK60HZ. 17.06. 5167558_00

GLYCOL

ETHYLENE GLYCOL

COOLING MODE

CORRECTION FACTOR WITH ETHYLENE GLYCOL - COOLING MODE

Freezing Point °C 0 -3,63 -6,10 -8,93 -12,11 -15,74 -19,94 -24,79 -30,44 -37,10

Percent ethylene glycol % 0 10 15 20 25 30 35 40 45 50

Qwc - 1,000 1,033 1,040 1,049 1,060 1,072 1,086 1,102 1,120 1,141

Pc - 1,000 0,990 0,985 0,980 0,975 0,970 0,965 0,960 0,955 0,950

Pa - 1,000 0,996 0,994 0,992 0,990 0,988 0,986 0,984 0,982 0,980

Dp - 1,000 1,109 1,157 1,209 1,268 1,336 1,414 1,505 1,609 1,728

Average water temperature = 9,5 °C

HEATING MODE

CORRECTION FACTOR WITH ETHYLENE GLYCOL - HEATING MODE

Freezing Point °C 0 -3,63 -6,10 -8,93 -12,11 -15,74 -19,94 -24,79 -30,44 -37,10

Percent ethylene glycol % 0 10 15 20 25 30 35 40 45 50

Qwh - 1,000 1,027 1,038 1,050 1,063 1,078 1,095 1,114 1,135 1,158

Ph - 1,000 1,000 1,000 1,000 1,000 1,000 1,000 1,000 1,000 1,000

Pa - 1,000 1,002 1,003 1,004 1,005 1,007 1,008 1,010 1,012 1,015

Dp - 1,000 1,087 1,128 1,175 1,227 1,286 1,353 1,428 1,514 1,610

Average water temperature = 42,5 °C

Qwc: Correc� ve factor of fl ow rates (middle water temperatur 9,5°C)Qwh: Correc� ve factor of fl ow rates (middle water temperatur 42,5°C)Pc: Correc� ve factor of cooling capacityPh: Correc� ve factor of hea� ng capacityPa: Correc� ve factor of imput powerDp: Correc� ve factor of pressure drop

PROPILENE GLYCOL

COOLING MODE

CORRECTION FACTOR WITH PROPILENE GLYCOL - COOLING MODE

Freezing Point °C 0 -3,43 -5,30 -7,44 -9,98 -13,08 -16,86 -21,47 -27,04 -33,72

Percent PROPILENE glycol % 0 10 15 20 25 30 35 40 45 50

Qwc - 1,000 1,007 1,006 1,007 1,010 1,015 1,022 1,032 1,044 1,058

Pc - 1,000 0,985 0,978 0,970 0,963 0,955 0,947 0,939 0,932 0,924

Pa - 1,000 0,996 0,994 0,992 0,990 0,988 0,986 0,984 0,982 0,980

Dp - 1,000 1,082 1,102 1,143 1,201 1,271 1,351 1,435 1,520 1,602

Average water temperature = 9,5 °C

HEATING MODE

CORRECTION FACTOR WITH PROPILENE GLYCOL - HEATING MODE

Freezing Point °C 0 -3,43 -5,30 -7,44 -9,98 -13,08 -16,86 -21,47 -27,04 -33,72

Percent PROPILENE glycol % 0 10 15 20 25 30 35 40 45 50

Qwh - 1,000 1,008 1,014 1,021 1,030 1,042 1,055 1,071 1,090 1,112

Ph - 1,000 1,000 1,000 1,000 1,000 1,000 1,000 1,000 1,000 1,000

Pa - 1,000 1,003 1,004 1,005 1,007 1,009 1,011 1,014 1,018 1,023

Dp - 1,000 1,050 1,077 1,111 1,153 1,202 1,258 1,321 1,390 1,467

Average water temperature =42,5 °C

Qwc: Correc� ve factor of fl ow rates (middle water temperatur 9,5°C)Qwh: Correc� ve factor of fl ow rates (middle water temperatur 42,5°C)Pc: Correc� ve factor of cooling capacityPh: Correc� ve factor of hea� ng capacityPa: Correc� ve factor of imput powerDp: Correc� ve factor of pressure drop

25NRK60HZ. 17.06. 5167558_00

Deposit corrective factors [K*M2]/[W]0.00005 0.0001 0.0002

Cooling capacity correction factors 1 0.98 0.94Input power correction factors 1 0.98 0.95

DIRT

26 NRK60HZ. 17.06. 5167558_00

SOUND DATA

Unit NotesTotal sound levels Octave band (Hz)

Pow. Pres. 10m Pres. 1m 125 250 500 1000 2000 4000 8000dB(A) dB(A) dB(A) Sound power for central band [dB] (A) frequency

NRK0150 82,9 N/A N/A 64,4 65,6 73,4 76,4 79,4 74,3 69,3NRK0300 85,4 N/A N/A 65,7 70,4 76,0 78,4 81,8 77,4 72,2NRK0330 85,4 N/A N/A 63,2 67,6 76,0 78,3 81,8 77,7 72,5NRK0350 92,3 N/A N/A 63,6 68,1 76,7 80,8 91,3 81,0 74,4NRK0550 86,2 N/A N/A 63,6 68,1 77,4 78,6 82,7 78,4 74,2NRK0600 88,1 N/A N/A 65,1 69,9 79,4 80,7 84,6 80,1 75,4NRK0650 87,8 N/A N/A 63,4 67,4 77,1 80,2 84,6 80,5 75,3NRK0700 95,1 N/A N/A 63,4 67,5 77,8 83,0 94,3 83,9 77,3

27NRK60HZ. 17.06. 5167558_00

MINIMUM TECHNICAL SPACES

Unit Vers. Fans A B C D ENRK n. in in in in in0150 A 2 32 43 32 32 1180300 A 8 32 43 32 32 1180330 A 2 32 43 32 32 1180350 A 2 32 43 32 32 1180550 A 2 32 43 32 32 1180600 A 3 32 43 32 32 1180650 A 3 32 43 32 32 1180700 A 3 32 43 32 32 118

A

B

C

D

E

NRK 0150

A

B

CD

E

NRK 0330-0350-0550

A

B

CD

E

NRK 0300

A

B

CD

E

NRK 0600-0650-0700

28 NRK60HZ. 17.06. 5167558_00

Hydraulic height H m 30 25 20 15 ≥ 12.25Expansion tank pressure setting bar 3.2 2.8 2.3 1.8 1.5Reference value water content l (1) 2.174 2.646 3.118 3590 3852Reference value water content l (2) 978 1190 1404 1616 1732Reference value water content l (3) 510 622 732 844 904

Operating conditions reference:1. Cooling: Max. water temperature = 104°F, min. water temperature = 39.2°F.2. Heating (heat pump): Max. water temperature = 140°F, min. water temperature = 39.2°F.3. Heating (boiler): Max. water temperature = 185°F, min water temperature = 39.2°F.

LEGEND:(1) Ensure that the maximum height

of the system does not exceed 55 metres.

(2) Ensure that the lowest point of the system can handle the total pressure.

Glycol Water temperature °F Correction coefficientReference condition

max. min.10% 104 28.4 0.507 (1)10% 140 28.4 0.686 (2)10% 185 28.4 0.809 (3)20% 104 21.2 0.434 (1)20% 140 21.2 0.604 (2)20% 185 21.2 0.729 (3)35% 104 21.2 0.393 (1)35% 140 21.2 0.555 (2)35% 185 21.2 0.677 (3)

EXPANSION TANK PRESSURE SETTING

The standard pressure setting value that the expansion tank is pre-charged to is 2bar, the volume is 6.3gal, the maximum value is 6 bar. The expansion tank pressure setting has to be adjusted based on the difference in height (H) of the installation (see figure) according to the formula: p (rating) [bar] = H [m] / 10.2 + 0.3.For example, if the difference in height H is 20 m then the value of the expansion tank pressure setting p is 2.3 bar. If the calculated pressure setting value is less than 1.5 bar (when H < 12.25), maintain the standard pressure setting.

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AERMEC S.p.A.Via Roma, 99637040 Bevilacqua (VR) - ItaliaTel. + 39 0442 633111Fax +39 0442 93577marketing@aermec.comwww.aermec.com

Aermec reserves the right to make all modification deemed necessary for improving the product at any time with any modification of technical data.