Operating reliably down to -35°C ambient temperature, this R290 cold climate heat pump delivers space heating and domestic hot water in severe cold regions. Utilizing dual-stage rotary/scroll compression and EVI (Enhanced Vapor Injection) technology, the unit maintains over 80% of its rated heating capacity at -15°C and provides leaving water temperatures up to 75°C, serving as a high-efficiency solution for hydronic heating retrofits and low-carbon buildings.
Key Features
Sub-Zero Operation: Continuous heating output down to -30°C ambient without mandatory auxiliary electric heater intervention.
High-Temperature Water Delivery: Maximum leaving water temperature of 75°C, compatible with traditional high-temperature cast-iron and aluminum radiators for seamless retrofit projects.
Acoustic Silence: Multi-layer sound insulation enclosure, DC inverter fan motor, and floating compressor mounting limit sound pressure level to 42 dB(A) at a 3-meter distance.
Adaptive Defrost Control: Real-time coil temperature, humidity, and runtime algorithm minimizes defrost cycle frequency and duration.
Low GWP Refrigerants: Factory-charged with eco-friendly R290 propane or R32, fully compliant with international environmental regulations and F-gas directives.
Technical Specifications
|
Technical Parameters |
Model: NCH-12R (Single Phase) |
Model: NCH-18R (Three Phase) |
Model: NCH-24R (Three Phase) |
|
Heating Capacity (+7°C Ambient / 35°C Water) |
12.0 kW |
18.5 kW |
24.0 kW |
|
COP (+7°C Ambient / 35°C Water) |
4.65 |
4.58 |
4.52 |
|
Heating Capacity (-15°C Ambient / 35°C Water) |
10.2 kW |
15.6 kW |
20.5 kW |
|
COP (-15°C Ambient / 35°C Water) |
2.85 |
2.80 |
2.76 |
|
Max Leaving Water Temperature |
75°C |
75°C |
75°C |
|
Operating Ambient Temperature Range |
-35°C ~ +43°C |
-35°C ~ +43°C |
-35°C ~ +43°C |
|
Compressor Type |
EVI DC Inverter Rotary |
EVI DC Inverter Scroll |
EVI DC Inverter Scroll |
|
Refrigerant / Charge |
R290 / 1.4 kg |
R290 / 2.2 kg |
R290 / 2.8 kg |
|
Sound Power Level (EN 12102) |
52 dB(A) |
55 dB(A) |
57 dB(A) |
|
Power Supply |
220-240V/1Ph/50Hz |
380-415V/3Ph/50Hz |
380-415V/3Ph/50Hz |
|
Water Connection Size |
1-inch BSP |
1-inch BSP |
1.25-inch BSP |
|
Net Dimensions (W x D x H) |
1110 x 480 x 880 mm |
1150 x 520 x 1420 mm |
1150 x 520 x 1420 mm |
|
Net Weight |
135 kg |
185 kg |
198 kg |
Technology & Performance
EVI Twin-Injection Compression: An intermediate enthalpy-adding flash tank increases refrigerant mass flow rate at sub-zero temperatures, stabilizing discharge temperature and preventing compressor overheating.
Hydrophilic Blue-Fin Evaporator: Wide-pitch louvered fins with hydrophilic coating accelerate condensate drainage during defrost cycles to mitigate coil ice bridging.
Integrated Hydraulic Module: Incorporates a high-efficiency Wilo/Grundfos inverter circulation pump, expansion vessel, Alfa Laval/SWEP plate heat exchanger, and safety relief valve, reducing on-site installation time by 50%.
Smart IoT Controller: Modbus RTU and BACnet protocols enable seamless Building Management Systems (BMS) integration and remote diagnostics.
Applications
Residential Hydronic Heating: Stable low-temperature water delivery (35°C to 45°C) for underfloor heating loops and fan coil units in insulated homes.
Legacy Boiler Retrofits: Direct fossil-fuel boiler replacement by supplying high-temperature water (60°C to 75°C) to existing high-temperature radiator circuits.
Light Commercial Projects: Cascaded multi-unit configurations (up to 16 units in parallel) delivering up to 384 kW heating capacity for offices, retail spaces, and multi-family apartments.
OEM & ODM Customization
Structural Enclosures: Tailored cabinet dimensions, custom RAL powder-coating colors, and laser-etched private-label nameplates.
Hydraulic Integration: Optional integration of auxiliary electric heaters (3 kW to 9 kW), dual-zone mixing valves, or domestic hot water 3-way diverter valves.
Controller Branding: Customized boot logos, localized touchscreen UI languages, and proprietary API integration for regional cloud platforms.
Quality Control & Manufacturing Facility
Manufacturing Capacity: Produced in a 45,000 m² vertically integrated HVAC facility with an annual output of 50,000 units.
100% Helium Leak Testing: Executed on all refrigerant circuits and brazed joints under 3.0 MPa pressure.
Electrical Safety Verification: Dielectric withstand testing (3000V), earth continuity testing, and insulation resistance checks performed on every batch.
Acoustic & Performance Testing: Sound power level verification compliant with ISO 3744 standards, paired with full-load calorimeter climate simulation labs covering -35°C to +45°C operating points.
Certifications: CE-LVD, CE-EMC, ErP Energy Efficiency Label (A+++ at 35°C / A++ at 55°C), KEYMARK, and RoHS compliance.
Packaging & Shipping
Export-Standard Crating: Fumigation-free plywood crates with internal shock-absorbing EPE foam blocks and moisture-barrier vacuum packaging.
Transit Monitoring: Palletized units equipped with Shockwatch and tilt-watch indicator labels.
Logistics Efficiency: Optimized container loading (18 units per 40' High Cube container for standard outdoor chassis) with flexible FOB/CIF terms from major ports.
FAQ
Request a Quote
Call to Action: Submit project specifications (heating load, design ambient temperature, target standards) to receive a custom technical proposal, STEP/CAD drawings, and wholesale pricing within 24 hours.
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