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Technical Manual 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 EN 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
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