Technical Manual

CERTIFICATION 60Hz REFRIGERANT COOLING AND SCROLL AXIAL FAN PLATE HEAT PUMP KIT WATER TANK LOWNOISE NETWORK MODBUS INTERNET FOR TWO PIPES GAS HEATING COMPRESSOR EXCHANGER RECOVERY VERSION OPERATION COMPATIBLE CONNECTIONS PLANTS

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

NRK60HZ. 18.05. 5167558_01 TRANSLATION FROM ORIGINAL 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 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.

Versions NRK_H_A High efficiency

Maximum reliability 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.

Renewable Energy for the redevelopment of the environments 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.

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

NRK60HZ. 17.06. 5167558_00 5 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 NRK 0150 0300 0330 0350 0550 0600 0650 0700 00 Without hydronic kit 00 • • • • • • • • 01 With storage tank and single low head pump 01 • • • • • • • • 02 With storage tank and twin low head pumps (duty + standby) 02 n.a. • • • • • • • 03 With storage tank and single high head pump 03 • • • • • • • • 04 With storage tank and twin high head pumps (duty + standby) 04 n.a. • • • • • • • P1 With single low head pump P1 • • • • • • • • P2 With twin low head pumps (duty + standby) P2 n.a. • • • • • • • P3 With single high head pump P3 • • • • • • • • P4 With twin high head pumps (duty + standby) P4 n.a. • • • • • • •

6 NRK60HZ. 17.06. 5167558_00 DESCRIPTION OF COMPONENTS ADDITIONAL COMPONENTS OF THE CONFIGURATOR

REFRIGERANT CIRCUIT PUMP Offers static pressure useful to system, excluding the unit pressure drops COMPRESSORS the unit. Scroll hermetic compressors, assembled on anti-vibration elastic supports with 2-pole electric motors. EXPANSION VESSEL With membrane expansion tank with nitrogen pre-charge (for capacity see SYSTEM SIDE HEAT EXCHANGER technical data). Braze welded AISI 316 steel plate heat exchanger. The heat exchanger is insulated externally with closed cell neoprene anti-condensation material. SYSTEM STORAGE TANK Fitted as standard with an electric anti-freeze resistor. 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. SOURCE SIDE HEAT EXCHANGER Made of steel to reduce heat loss and to eliminate the formation of Finned pack heat exchanger made with copper pipes and aluminium fins condensation, it is insulated by thick polyurethane. adequately spaced to ensure high-efficiency. SAFETY AND CONTROL COMPONENTS CYCLE REVERSING VALVE 4-way cycle reversing valve. Inverts the flow of refrigerant gas. COOLING CIRCUIT SAFETY VALVES They intervene by discharging the overpressure in case of anomalous DEHYDRATOR FILTER pressures. Calibrated at 30 bar on HP branch. Hermetic with cartridge made of ceramic and hygroscopic material, able to withhold impurities and any traces of humidity present in the cooling circuit. HIGH PRESSURE PRESSURE SWITCH With fixed calibration, placed on the high pressure side of the cooling circuit, THERMOSTATIC VALVE (STANDARD °) it inhibits the operation of the compressor if abnormal work pressure occurs. Mechanical valve, with external equaliser positioned at evaporator outlet, modulates the flow of gas to the evaporator, according to the heat load, in LOW PRESSURE TRANSDUCER order to ensure a correct heating level of the intake gas. Allows displaying, on the microprocessor board display, the value of the compressor’s suction pressure (one per circuit) on the low-pressure side of SOLENOID VALVE the cooling circuit. The valve closes when the compressor switches off, blocking the flow of refrigerant gas to the evaporator. HIGH PRESSURE TRANSDUCER Placed on the high pressure side of the cooling circuit, signals the work ONE-WAY VALVE pressure to control board, generating a pre-warning in case abnormal They allow one-way flow of the refrigerant. pressure occurs. STRUCTURE AND FANS

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

FAN UNIT 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 continuously adjusts the fans’ speed.

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.

DRAIN VALVE

IDRAULIC SAFETY VALVE (ONLY STORAGE TANK CONFIGURATION)

NRK60HZ. 17.06. 5167558_00 7 REGULATION FOR NRK 0150 REGULATION FOR NRK 0300-0330-0350-0550-0600-0650-0700

ELECTRONIC MODU CONTROL ELECTRONIC pCO5

Temperature control of the output water with proportional-integral Microprocessor board It consists of a management and control board and of a display algorithm: maintains the average outlet temperature at the set board. value. − Self-adaptive activation differential: ensures minimum operation Functions: times of the compressor in systems with low water content. • compressor start-up delay − Set-point compensation with external temperature (with • compressor sequence rotation external air probe accessory): reduces energy consumption. • compressor operation hours count − Automatic reset pre-alarm: in case of alarm, a determined • start/stop number of re-starts is allowed before the definitive block. • reset − Alarm on ∆T: to identify wiring errors (reverse rotation) or • alarm permanent memory blocked cycle reversing valve. • auto-start after voltage drop − Compressor operation hours count. • multilingual messaging − Compressor peak count. • operation with local or remote control (PGD1 accessory) − Alarm log. − Autostart after voltage drop. Machine condition display − Local or remote control. • compressors ON/OFF • alarm summary Display of the state of the unit: 1. Voltage presence Alarms management 2. Compressor ON/OFF • high pressure 3. Operation mode (hot/cold) • flow switch 4. Alarm active • low pressure • anti-freeze Probes, transducers and parameter display • compressor overload 1. Water outlet • fan overload 2. Water inlet • pump overload; 3. Pressing line gas temperature Display of the following parameters 4. Intake pressure optional • water inlet temperature 5. Set-point temperature error (sum of the proportional and • water outlet temperature integral error) • delta T 6. Stand-by times for start-up/switch-off of the compressor • high pressure 7. Alarm/pre-alarm management • low pressure 8. Low pressure • restart time 9. High pressure • alarms display 10. High discharge temperature 11. Anti-freeze Settings 12. Flow switch a) without password: 13. Allarm on the ∆T • cold set 14. Compressor magnet circuit breaker • total differential a) with password: 15. Probe failure alarm • anti-freeze set • low pressure exclusion time − Pre-alarms with automatic reset with limited number of re-starts • display language before blocking. • Access code − ON/OFF external contact. − Change season from external contact. For further information, refer to the user manual. For further information refer to the user manual.

8 NRK60HZ. 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 2 High pressure switch 1 2 2 2 2 2 2 2 Low pressure switch ------Low pressure transducer 1 2 2 2 2 2 2 2 Cycle reversing valve 1 2 2 2 2 2 2 2 Dehydrator filter 1 2 2 2 2 2 2 2 Liquid storage tank 1 2 2 2 2 2 2 2 Liquid separator 1 2 2 2 2 2 2 2 Thermostatic valve Mechanical One-way valve 8 8 8 8 8 8 8 8 Cooling circuit safety valve High Pressure ------Cooling circuit safety valve Low Pressure (30bar) 1 2 2 2 2 2 2 2 Shut-off valve ------Solenoid valve - 2 2 2 2 2 2 2 Economizer 1 2 2 2 2 2 2 2

STANDARD COMPONENTS - HYDRAULIC CIRCUIT

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

VERSION P1-P2-P3-P4 Flow switch 1 1 1 1 1 1 1 1 Differential pressure switch ------Water filter 1 1 1 1 1 1 1 1 Air vent valve 1 1 1 1 1 1 1 1 Water safety valve ------Inlet water probe 1 1 1 1 1 1 1 1 Outlet water probe 1 1 1 1 1 1 1 1 Drain tap 1 1 1 1 1 1 1 1 Loading unit ------Pump • • • • • • • • Expansion vessel - n°/bar 1 / 3.5 1 / 2 1 / 2 1 / 2 1 / 2 1 / 2 1 / 2 1 / 2

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

- : Not Available • : Available

NRK60HZ. 17.06. 5167558_00 9 COOLING CIRCUITS

NRK 150

KEY AP High pressure switch BPAL Finned coil CP Compressor F Dehydrator filter IL Liquid indicator SIW Inlet water probe SP Plate heat exchanger SUW Outlet water probe TAP High pressure TRANSDUCER TBP Low pressure transducer VT Thermostatic valve VSL Solenoid valve VU One-way valve SEP Liquid separator VIC Cycle reversing valve AL Liquid storage tank SGP Pressing line gas probe

10 NRK60HZ. 17.06. 5167558_00 HYDRAULIC CIRCUIT WARNING VERSION 00 The selection and installation of the components outside the appliance is assigned, due to his 3 5 competence, to the installer who will have to 6 7 operate according to the rules of good practice

8 and in compliance with the regulations in force in 9 4 the country of destination. 15 1 The hydraulic piping for connection to the 4 14 appliance must be properly scaled for the actual 5 12 2 6 7 10 7 water flow rate required by the system when 11 operating. The water flow rate to the heat 13 13 13 exchanger must always be constant.

Clean the system carefully before connecting the NRK 60Hz 0300 ÷ 0700 [00] 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 COMPONENTS SUPPLIED AS PER STANDARD appliance to malfunction. The connection pipes must be properly supported so as not to burden 1 - Plate exchanger the appliance with their weight. 2 - Water filter 3 - Fow switch SYSTEM DRAINING 4 - Air vent valve If the system is shut down during the winter, the 5 - Water temperature probes (in/out) 13 - Drain valve *(not supplied for NRK 0150) 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: RECOMMENDED COMPONENTS NOT SUPPLIED FOR WHICH INSTALLER IS RESPONSIBLE 1. Completely drain the water from the appliance. 4 - Air vent valve 6 - Anti-vibration joints 2. Operation with glycol water, with a glycol 7 - Cut-off valve percentage chosen on the basis of the 8 - Safety valve minimum external temperature envisaged. 9 - Expansion Tank 3. Use of heaters. 10 - System buffer tank (installation recommended whenever the system water content is less than that In this case the heaters must always be indicated in tab.) powered for the entire winter period (machine 11 - Antifreeze electric heater in standby). 12 - Pump 13 - Drain valve 14 - Gauge 15 - Automatic fill point

WARNING Obligatory components (NOT SUPPLIED) that are the responsibility of the installer

• WATER FILTER The 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. Characteristics of the water The filter must have at least the diameter of System: Chiller with plate heat exchanger the units fittings. PH 7.5-9 Electrical conductivity 100-500μS/cm • FLOW SWITCH Total hardness 4.5-8.5 dH External air < 65°C The flow switch has the task of making sure Oxygen content < 0.1 ppm that water is circulating in the unit. Maximum glycol content 0.5 If this is not the case, it shuts down the unit. Phosphates (PO4) < 2ppm The unit does not start if the flow switch Manganese (Mn) < 0.05 ppm is not wired to the panel and should be Iron (Fe) < 0.3 ppm calibrated at 50% of the nominal capacity Alkalinity (HCO3) 70 - 300 ppm Chlorine ions (Cl-) < 50 ppm Sulphate ions (SO4) < 50 ppm Aermec will not be responsible for any Sulphide ion (S) none damage to the heat exchanger if there is no Ammonium ions (NH4) none water filter or flow switch Silica (SiO2) < 30ppm

NRK60HZ. 17.06. 5167558_00 11 WARNING VERSION P1-P2-P3-P4 The selection and installation of the components outside the appliance is assigned, due to his 3 competence, to the installer who will have to 6 7 operate according to the rules of good practice and in compliance with the regulations in force in 4 8 5 9 the country of destination. 15 1 The hydraulic piping for connection to the appliance must be properly scaled for the actual 9 4 14 10 water flow rate required by the system when 5 12 2 6 7 7 11 operating. The water flow rate to the heat exchanger must always be constant. 13 13 Clean the system carefully before connecting the NRK 60Hz 0300 ÷ 0700 [P1-P2-P3-P4] 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 COMPONENTS SUPPLIED AS PER STANDARD appliance to malfunction. The connection pipes must be properly supported so as not to burden 1 - Plate exchanger the appliance with their weight. 2 - Water filter 3 - Fow switch SYSTEM DRAINING 4 - Air vent valve If the system is shut down during the winter, the 5 - Water temperature probes (in/out) water in the heat exchanger could freeze, causing 9 - Expansion Tank irreparable damage to the exchanger itself. 12 - Pump 13 - Drain valve To avoid the risk of freezing, there are three possible solutions: RECOMMENDED COMPONENTS NOT SUPPLIED FOR WHICH INSTALLER IS RESPONSIBLE 1. Completely drain the water from the 4 - Air vent valve appliance. 6 - Anti-vibration joints 2. Operation with glycol water, with a glycol 7 - Cut-off valve percentage chosen on the basis of the 8 - Safety valve minimum external temperature envisaged. 9 - Expansion Tank 3. Use of heaters. 10 - System buffer tank (installation recommended whenever the system water content is less than that In this case the heaters must always be indicated in tab.) 11 - Antifreeze electric heater powered for the entire winter period (machine 13 - Drain valve in standby). 14 - Gauge 15 - Automatic fill point

WARNING Obligatory components (NOT SUPPLIED) that are the responsibility of the installer

12 NRK60HZ. 17.06. 5167558_00 WARNING VERSION 01-02-03-04 The selection and installation of the components outside the appliance is assigned, due to his 3 competence, to the installer who will have to 6 7 operate according to the rules of good practice and in compliance with the regulations in force in 4 8 5 9 the country of destination.

1 The hydraulic piping for connection to the 15 appliance must be properly scaled for the actual 4 10 14 water flow rate required by the system when 5 12 2 7 6 7 11 operating. The water flow rate to the heat exchanger must always be constant. 13 NRK 0300 ÷ 0700 [01-02-03-04] 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 COMPONENTS SUPPLIED AS PER STANDARD appliance to malfunction. The connection pipes 1 - Plate exchanger must be properly supported so as not to burden 2 - Water filter the appliance with their weight. 3 - Fow switch 4 - Air vent valve SYSTEM DRAINING 5 - Water temperature probes (IN/OUT) If the system is shut down during the winter, the 7 - Cut-off valve water in the heat exchanger could freeze, causing 8 - Safety valve *not supplied for NRK 0700 irreparable damage to the exchanger itself. 9 - Expansion Tank To avoid the risk of freezing, there are three 10 - System buffer tank (installation recommended whenever the system water content is less than that possible solutions: indicated in tab.) 11 - Antifreeze electric heater 1. Completely drain the water from the 12 - Pump appliance. 13 - Drain valve 2. Operation with glycol water, with a glycol percentage chosen on the basis of the RECOMMENDED COMPONENTS NOT SUPPLIED FOR WHICH INSTALLER IS RESPONSIBLE minimum external temperature envisaged. 3. Use of heaters. 6 - Anti-vibration joints In this case the heaters must always be 7 - Cut-off valve powered for the entire winter period (machine 14 - Gauge in standby). 15 - Automatic fill point

WARNING Obligatory components (NOT SUPPLIED) that are the responsibility of the installer

NRK60HZ. 17.06. 5167558_00 13 ACCESSORIES Accessories mounted in the factory: AER 485P1 GP RS-485 interface for supervising systems with MODBUS protocol. kit with anti-intrusion grid for the short side of the unit. AERWEB300UL AERWEB device allows the remote control of a chiller by means of a common DRENRK PC through Ethernet connection, via a common browser; 4 models available: Plate peak current reduction electronic device. AERWEB300UL-6: Web server for monitoring and controlling maximum 6 RS485 network devices; RIFNRK AERWEB300UL-18: Web server for monitoring and controlling maximum 18 Current power factor correction. Connected in parallel to the motor, it allows RS485 network devices; a reduction of the input current (approx. 10%). AERWEB300UL-6G: Web server for monitoring and controlling maximum 6 RS485 network devices with integrated GPRS modem; RESNRK AERWEB300UL-18G: Web server for monitoring and controlling maximum 18 Anti-freeze electric resistance board. RS485 network devices with integrated GPRS modem; CRATE PGD1 Special wood cover for transport. Allows you to control the chiller at a distance.

MULTICHILLER_UL Control, 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.

VT Group of anti-vibration supports.

14 NRK60HZ. 17.06. 5167558_00 ACCESSORIES COMPATIBILITY

NRK 0150 0300 0330 0350 0550 0600 0650 0700 AER485P1 n.a. • • • • • • • AERWEB300UL • • • • • • • • PGD1 n.a. • • • • • • • MULTICHILLER_UL n.a. • • • • • • • 00 15 • • • • • • • VT P1-P4 15 • • • • • • • 01-04 15 • • • • • • •

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

• Available n.a. Not available

NRK60HZ. 17.06. 5167558_00 15 OPERATING RANGE The 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 - COOLING MODE °F

130

118.4 110 104

70 THERMOSTATIC VALVE °

50 Dry bulb ambient air temperature °F air temperature Dry bulb ambient 30

-10 30 39.2 50 60 64.4 70 °F Outlet Water Temperature °F

OPERATING RANGE - HEATING MODE

°F 120 107.6 100

60 THERMOSTATIC VALVE ° 40

20 Dry bulb ambient air temperature °F air temperature Dry bulb ambient 14

-4 -20 50 77 90 110 131 149 170 °F

Outlet Water Temperature °F

16 NRK60HZ. 17.06. 5167558_00 PERFORMANCE SPECIFICATIONS

NRK 0150 0300 0330 0350 0550 0600 0650 0700 PERFORMANCE IN COOLING MODE Cooling capacity ton 8,8 16,1 19,0 21,5 24,0 32,3 36,6 39,7 Total input power kW 9,6 20,2 23,7 27,0 29,9 40,3 49,9 58,1 EER BTU/W 11,03 9,56 9,62 9,57 9,62 9,63 8,82 8,20 IPLV BTU/W 14,92 13,51 13,61 13,42 13,37 13,79 12,74 11,24 EER_100% BTU/W 11,03 9,56 9,62 9,57 9,62 9,63 8,82 8,20 EER_75% BTU/W 13,39 12,04 12,03 11,94 11,98 12,82 11,83 10,58 EER_50% BTU/W 15,83 14,42 14,48 14,29 14,20 14,80 13,66 11,98 EER_25% BTU/W 17,21 15,63 16,19 15,68 15,50 13,78 12,76 11,00 Water flow rate gpm 21 39 46 52 58 78 88 95 00 p.s.i. 7,8 2,5 2,5 2,5 2,5 2,5 2,5 2,5 Pressure drop P1-P4 p.s.i. 22,9 2,8 2,8 2,8 2,8 2,8 2,8 2,8 01-04 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-3-60Hz Total input current - cooling mode A 20 34 38 48 51 64 79 100 Total input current - heating mode A 21 34 42 52 54 69 81 101 LRA A 134 165 184 222 223 199 234 278 MCA A 30 59 57 72 71 88 103 123 MOP A 47 76 78 97 96 105 124 148 Recom fuse A 45 75 75 90 90 100 110 125

NRK60HZ. 17.06. 5167558_00 17 GENERAL SPECIFICATIONS

NRK 0150 0300 0330 0350 0550 0600 0650 0700 COMPRESSORS Compressor type Type Scroll Scroll Scroll Scroll Scroll Scroll Scroll Scroll Compressor quantity n° 1 2 2 2 2 4 4 4 Circuit n° 1 2 2 2 2 2 2 2 % 100 50 50 50 50 25 25 25 % - 100 100 100 100 50 50 50 Part load % - - - - - 75 75 75 % - - - - - 100 100 100 REFRIGERANT GAS Refigerant gas Type R410A R410A R410A R410A R410A R410A R410A R410A Refrigerant load lbs OIL Oil Type (POE) gal 160SZ 160SZ 160SZ 160SZ 160SZ 160SZ 160SZ 160SZ C1 gal 0,9 1,8 1,8 1,8 1,8 3,6 3,6 3,6 Oil load C2 gal - contact us EXCHANGER Exchanger Type Plate Plate Plate Plate Plate Plate Plate Plate Quantity n° 1 1 1 1 1 1 1 1 Min. water flow gpm n.d 9 12 16 16 22 22 24 Max. water flow gpm 62 263 263 263 263 263 263 263 Water content gal 0,5 1,7 2,2 2,9 2,9 3,9 3,9 4,1 Crankcase heater n°/W 1/40 1/150 1/150 1/150 1/150 1/150 1/150 1/150 HYDRAULIC CONNECTIONS Hydraulic 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

18 NRK60HZ. 17.06. 5167558_00 GENERAL SPECIFICATIONS

NRK 0150 0300 0330 0350 0550 0600 0650 0700 FANS (°) Type fans Type AXIAL-FAN Motor fans Type no. 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 Pa Fans total input power kW Fans total input current A FANS (J) Type fans Type AXIAL-FAN Motor fans Type EC-INVERTER no. of fans n° 2 8 2 2 2 3 3 3 Air flow rate cfm 8064 23190 22366 21954 21954 33314 37904 37904 Available nominal static pressure Pa Fans total input power kW Fans total input current A HYDRONIC KIT only for configuration with pump P1-P2-P3-P4 gal Expansion vassel P1-P2-P3-P4 n°/bar HYDRONIC KIT storage tank and pump Storage tank 01-02-03-04 gal 01-02-03-04 gal Expansion vassel 01-02-03-04 n°/bar

Note: n.a.: Not Available

NRK60HZ. 17.06. 5167558_00 19 DIMENSIONS AND WEIGHTS

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

Height P1-P2-P3-P4 in Width P1-P2-P3-P4 in Depth P1-P2-P3-P4 in Empty weight P1-P2-P3-P4 lbs Running weight P1-P2-P3-P4 lbs

Height 01-02-03-04 in Width 01-02-03-04 in Depth 01-02-03-04 in Empty weight 01-02-03-04 lbs Running weight 01-02-03-04 lbs

20 NRK60HZ. 17.06. 5167558_00 PRESSURE DROPS

VERSIONS WITHOUT HYDRONIC KIT “00” ONLY PLATE HEAT EXCHANGER

kPa psi 160 23.2 1 22 NRK

1 140 20 0150

18 120 16 100 14

80 12

10 60 8

40 6

4 20 2

0 0

2 4 6 8 12 14 16 18 22 24 26 28 32 34 36 38 39.6 0 10 20 30 gpm

0 1000 2000 3000 4000 5000 6000 7000 8000 9000 l/h

kPa psi 50 7.3 2 3 4 5 6 7 8 NRK 2 0300 6 40 3 0330 4 0350 5 5 0550 30 6 4 0600 7 0650 20 3 8 0700

10 1

0 0

0 20 40 60 80 100 120 140 160 176 gpm

0 10000 20000 30000 40000 l/h

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

NRK60HZ. 17.06. 5167558_00 21 USEFUL STATIC PRESSURES

LOW USEFUL HEADS LOW USEFUL HEAD P1-P2-01-02

kPa p.s.i. 300 43.5 1 NRK 0150 P1-01 40 2 NRK 0300-0330-0350-0550 P1-P2-01-02 250 3 NRK 0600 P1-P2-01-02 4 NRK 0650-0700 P1-P2-01-02 30 200

150 20 4 100 3 10 2 50

1 0 0

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

0 5000 10000 15000 20000 25000 30000 35000 l/h

HIGH USEFUL HEADSHIGH USEFUL HEAD P3-P4-03-04

kPa p.s.i. 300 43.5 1 NRK 0150 P3-03 40 2 NRK 0300-0330-0350-0550 P3-P4-03-04 250 3 NRK 0600-0650-0700 P3-P4-03-04

30 200

3 150 20 2 100

10 1 50

0 0

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

0 5000 10000 15000 20000 25000 30000 35000 l/h

22 NRK60HZ. 17.06. 5167558_00 WATER SYSTEM CONTENT

Minimum water content in the system The 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.

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

Maximum water content in the system Units 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.

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

CORRECTIVE FACTORS

Corrective factors for Average water temperatures different from the nominal System side heat exchanger Operation in cooling mode Heating mode Average water temperatures (°F) 41.0 50.0 59.0 68.0 86.0 104.0 122.0 73.4 82.4 91.4 100.4 109.4 118.4 127.4 136.4 Corrective 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

NRK60HZ. 17.06. 5167558_00 23 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 capacity Ph: Correc� ve factor of hea� ng capacity Pa: Correc� ve factor of imput power Dp: 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

24 NRK60HZ. 17.06. 5167558_00 DIRT

Deposit corrective factors [K*M2]/[W] 0.00005 0.0001 0.0002 Cooling capacity correction factors 1 0.98 0.94 Input power correction factors 1 0.98 0.95

NRK60HZ. 17.06. 5167558_00 25 SOUND DATA

Total sound levels Octave band (Hz) Unit Notes Pow. Pres. 10m Pres. 1m 125 250 500 1000 2000 4000 8000 dB(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 69,3 NRK0300 85,4 N/A N/A 65,7 70,4 76,0 78,4 81,8 77,4 72,2 NRK0330 85,4 N/A N/A 63,2 67,6 76,0 78,3 81,8 77,7 72,5 NRK0350 92,3 N/A N/A 63,6 68,1 76,7 80,8 91,3 81,0 74,4 NRK0550 86,2 N/A N/A 63,6 68,1 77,4 78,6 82,7 78,4 74,2 NRK0600 88,1 N/A N/A 65,1 69,9 79,4 80,7 84,6 80,1 75,4 NRK0650 87,8 N/A N/A 63,4 67,4 77,1 80,2 84,6 80,5 75,3 NRK0700 95,1 N/A N/A 63,4 67,5 77,8 83,0 94,3 83,9 77,3

26 NRK60HZ. 17.06. 5167558_00 MINIMUM TECHNICAL SPACES

NRK 0150 NRK 0300

E E

A A

D D C C

B B

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

E E

A A

D D C C

B B

Unit Vers. Fans A B C D E NRK n. in in in in in 0150 A 2 32 43 32 32 118 0300 A 8 32 43 32 32 118 0330 A 2 32 43 32 32 118 0350 A 2 32 43 32 32 118 0550 A 2 32 43 32 32 118 0600 A 3 32 43 32 32 118 0650 A 3 32 43 32 32 118 0700 A 3 32 43 32 32 118

NRK60HZ. 17.06. 5167558_00 27 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 LEGEND: is 20 m then the value of the expansion (1) Ensure that the maximum height tank pressure setting p is 2.3 bar. If the of the system does not exceed calculated pressure setting value is less 55 metres. than 1.5 bar (when H < 12.25), maintain (2) Ensure that the lowest point of the standard pressure setting. the system can handle the total pressure.

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

Correction Reference Glycol Water temperature °F coefficient 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)

28 NRK60HZ. 17.06. 5167558_00 carta riciclata recycled paper papier recyclé recycled Papier

AERMEC S.p.A. Via Roma, 996 37040 Bevilacqua (VR) - Italia Tel. + 39 0442 633111 Fax +39 0442 93577 [email protected] www.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.