AIR-TO-WATER HEAT PUMPS – PRO SERIES – NESEA PRO KWFA
nesea proKWFA
Air-to-water Chillers and Heat Pumps for cold climates | High temperature up to 75ºC
2-16 kW4-23 kW 
Documentation
Features
Specifications table
Views & Dimensions
Controls
Documentation
Commercial documentation
Available languages:
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Features
Air-to-water Heat Pumps Suitable for Cold Climates | Water production up to 75ºC
In heating-only, cooling-only and reversible designs, suitable for residential or commercial applications.
New PRO Series: Optimized for the use of R290 refrigerant and Full-Inverter Technology.
Adaptation and Environment
- Reduced charge of natural R290 refrigerant, class A3, eco-friendly with low environmental impact (GWP = 3) and high thermodynamic performance. Also available with class A2L R454C refrigerant.
- Robust and reliable design integrates leak detection and an ATEX extraction fan for maximum safety.
- With careful insulation, they ensure proper equipment protection and noise reduction, achieving ultra-quiet operation.
- Units equipped with intelligent control that ensures an optimal defrosting process.
Energy Efficiency
- Compact Full-Inverter units equipped with a hermetic Scroll inverter compressor, electronic expansion valve, and EC fans that ensure the best seasonal performance (SEER/SCOP).
- Wide operating range with high efficiency and extended operating limits (operation down to -20ºC outdoor temperature at full load).
- Partial heat recovery available with the possibility of integrating the recirculation pump.
Specifications table
 |
General characteristics | KWFA |
|---|---|---|
| Refrigerant | R290 | ✓ |
| Equipment with refrigerant charge | ✓ | |
| Refrigerant R454C | • | |
| Leak detector | ✓ R290 • R454C |
|
| ATEX axial fan for refrigerant extraction | ✓ R290 • R454C |
|
| ATEX centrifugal fan for refrigerant extraction | • | |
| Indicator light in case of leakage | ✓ R290 • R454C |
|
| Bodywork | Self-supporting bodywork/cabinet made of galvanized steel with oven-cured polyester paint treatment | ✓ |
| Customized color to suit the needs of the installation | • | |
| Perimeter enclosure insulation | ✓ | |
| Perimeter-enclosed equipment with 20 mm sandwich panels | • | |
| Anti-vibration supplements | • | |
| Compressor | Inverter scroll technology | ✓ |
| Compressor anti-vibration mounts | ✓ | |
| Acoustic insulation jacket | • | |
| Expansion valves | Electronic expansion valves | ✓ |
| Display for electronic expansion valve | • |
 |
Fans | KWFA |
|---|---|---|
| Outdoor fans | EC axial fans with integrated curved nozzle | ✓ |
 |
Heat exchangers | KWFA |
|---|---|---|
| Coils | Cu tube and Al fin coils | ✓ |
| Cu tube bundle / polyurethane pre-lacquered Al fins | • | |
| BLYGOLD: Cu tubes / Al fins with Blygold coating | • | |
| COPPERFIN: Cu tubes / Cu fins | • | |
| Heat exchangers | Propane-water heat exchanger, AISI 316L stainless steel plates, copper-welded and thermally insulated | ✓ |
|
Energy | KWFA |
|---|---|---|
| Energy recovery | Partial recovery of condensation energy for domestic hot water (DHW) | • |
| Electric anti-icing heater in the plate heat exchanger for domestic hot water (DHW) recovery | • |
 |
Hydraulic | KWFA |
|---|---|---|
| Hydraulic components | Low temperature kit for operation with water outlet temperature < 0 ºC | • |
| Low outdoor temperature kit | • | |
| Flexible water inlet and outlet connections | • | |
| Water filter | • | |
| Installation of pressure gauges at the inlet and outlet of the equipment for S version | • |
 |
Installation | KWFA |
|---|---|---|
| Insulation | Thermal insulation in all cold metal lines (refrigerant or water) | • |
| Power supply | 400 V / III ph / 50 Hz with neutral | ✓ |
| 400 V / III ph / 60 Hz | • | |
| Other electrical voltages (see different options available) | • | |
| Packaging | Packaging for maritime transport | • |
 |
Control | KWFA |
|---|---|---|
| Electronic control and communication |
Programmable electronic control Aquamanager | ✓ |
| User and maintenance terminal pGD1 for AQUAMANAGER control (standard maximum distance between terminal and controller: 50 m) | ✓ | |
| TCONN cards (for distances between terminal and controller greater than 50 m) (consult technical manual) | • | |
| S485 card for Modbus communication | • | |
| BOSS / tERA monitoring systems | • | |
| BACNET / LONWORKS / KNX communication | • | |
| Defrosting | Defrosting by cycle reversal using a 4-way valve | ✓ |
| Additional control and safety components |
Main switch in electrical panel | ✓ |
| Magneto-thermal protections for compressors, fans, and pumps | ✓ | |
| Low-pressure switch for pump protection | • | |
| PREMIUM phase control relay, with phase failure detection and direction of rotation protection | ✓ | |
| EXCELLENT phase monitoring relay, adds phase unbalance, overvoltage and undervoltage detection | • | |
| Triple protection for the plate heat exchanger with a water flow switch and anti-ice protections for both water and refrigerant | ✓ | |
| Electric energy meter | • | |
| Electrical panel | Electrical panel insulated against refrigerant leaks | ✓ |
| Fully wired electrical panel, with IP54 protection | ✓ | |
| Forced ventilation of the electrical panel | ✓ | |
| Design of electrical switchgear for high temperatures | ✓ | |
| Tropicalised electrical panel | • | |
| Socket for common use | • | |
| Antifreeze electrical resistor in electrical panel for low outdoor temperatures | • |
| ✓ | Included as standard |
| • | Optional |
| – | Not applicable |
Views & Dimensions
Series 1 S/P
| Standard equipment dimensions (mm) | |
|---|---|
| Bodywork | Series 1 S/P |
| L | 1670 |
| W | 600 |
| H | 1300 |
Controls
NESEA PRO includes the programmable electronic control AQUAMANAGER and user terminal pGD1.
It is compatible with optional RS485 card for Modbus communication, boss / tERA Supervision systems, and BACNET / LONWORKS / KNX communication system.
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