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The FKH-80II/GW is a high-temperature air-source heat pump engineered to produce 75°C outlet water temperature for industrial applications and commercial complexes. Unlike standard heat pumps limited to 55°C output, this model uses an enhanced vapor injection (EVI) scroll compressor with two-stage compression to achieve higher lift temperatures while maintaining stable operation in cold climates. The unit transfers ambient thermal energy to the water circuit through a brazed plate heat exchanger, with a secondary economizer circuit that increases refrigerant mass flow during low-temperature operation. Testing per EN 14511 standards confirms 80kW heating capacity at 20°C ambient temperature with 25.8kW electrical input, achieving a COP of 3.1 at 75°C outlet temperature.
This model features a Panasonic EVI scroll compressor, 316L stainless steel brazed plate heat exchanger, Danfoss electronic expansion valve, and hydrophilic aluminum fin-and-tube evaporator coil. The top-discharge fan design uses an EC motor with variable speed control to reduce sound levels during partial load operation. The control system includes automatic high-temperature sterilization cycles for sanitary hot water applications, and supports BACnet communication for integration with industrial park energy management systems. The unit holds CE, ERP, and ISO 14001 certifications for commercial procurement in European and Asia-Pacific markets.
Operating Condition | Ambient Temperature (°C) | Heating Capacity (kW) | Input Power (kW) | COP |
|---|---|---|---|---|
A1 (Nominal) | 20 | 80 | 25.8 | 3.1 |
A2 (Standard Winter) | 7 | 76 | 28.1 | 2.7 |
A3 (Low Temperature) | -12 | 65 | 31.0 | 2.1 |
A4 (Extreme Cold) | -20 | 58 | 32.2 | 1.8 |
Parameter | Value |
|---|---|
Power Supply | 380V 3N~50Hz |
Maximum Outlet Water Temperature | 75°C |
Maximum Operating Current | 120A |
Water Flow Rate | 13.8 m³/h |
Sound Pressure Level at 1m | ≤65 dB(A) |
Water Side Pressure Drop | ≤85 kPa |
Unit Dimensions (L×W×H) | 2260×1030×2170 mm |
Water Connection Size | DN50 (flange) |
Operating Weight | 750 kg |
Refrigerant Type | R134a |
Compressor Warranty Period | 5 years |
Unit Warranty Period | 2 years |
For shopping centers, office parks, and mixed-use industrial zones requiring high-temperature hot water for both space heating and sanitary use, the FKH-80II/GW provides consistent 75°C water supply suitable for connection to existing radiator systems originally designed for boiler operation. This eliminates the need for complete terminal unit replacement during heating system retrofits. Field data from 45 industrial park installations shows 42-52% reduction in heating energy costs compared to coal-fired boilers, with corresponding reduction in on-site emissions that meet industrial park environmental compliance requirements.
For hospitals, hotels, and senior care facilities requiring 60-70°C hot water for sterilization and Legionella control, the unit maintains outlet temperature without auxiliary electric heating. The automatic pasteurization cycle raises water temperature to 70°C for 30 minutes on a scheduled basis to meet public health code requirements for commercial hot water systems. The titanium heat exchanger option supports direct heating in hard water areas with calcium carbonate concentrations up to 600 mg/L.
For food processing, laundry facilities, and agricultural product drying operations requiring 60-75°C process water, the FKH-80II/GW eliminates combustion safety risks associated with gas-fired equipment in enclosed production spaces. Textile dyeing facilities using this unit report stable temperature control within ±0.8°C during continuous process heating, reducing fabric rejection rates associated with temperature fluctuations during dyeing cycles. The unit operates without open flame, reducing fire insurance premiums for industrial facilities processing combustible materials.
The top-discharge design requires minimum 3000mm overhead clearance with no obstructions above the unit, and 1000mm clearance on service sides. The concrete foundation must support 900 kg/m² point loading. Ambient operating temperature range is -25°C to 40°C. Water supply pressure must remain between 0.2-0.5 MPa, with pH between 7.0 and 8.5 for standard heat exchangers. For installations at altitudes above 1500 meters, factory-adjusted refrigerant charge is required to maintain rated performance.
Evaporator coil inspection and cleaning is recommended every 6 months, with air filter replacement performed quarterly in dusty industrial environments. The water-side strainer should be cleaned monthly during the first three months of operation, then quarterly thereafter. The system logs 42 separate operating parameters and provides fault code diagnosis through the HMI panel, with remote alarm notification available through the optional 4G communication module. All maintenance work on the refrigerant circuit must be performed by technicians with Class II refrigeration certification.
Standard commercial heat pumps typically produce maximum 55-60°C outlet water, while the FKH-80II/GW achieves 75°C through EVI two-stage compression technology. This allows direct replacement of gas or oil boilers without modifying existing high-temperature radiator systems, reducing retrofit costs by 30-40% compared to standard heat pump installations that require terminal unit replacement.
The unit comes standard with RS485 Modbus RTU, with optional BACnet MS/TP or 4G LTE modules available for remote monitoring. The cloud-based monitoring platform stores 12 months of operating data, generates energy consumption reports, and sends automated maintenance reminders to designated facility management personnel. Local operation remains available even during network outages through the onboard touchscreen interface.
The intelligent defrost system uses four parameters (coil temperature, ambient temperature, operating duration, and refrigerant pressure differential) to determine defrost initiation, rather than fixed timing intervals. Hot gas bypass defrost technology reduces defrost duration by 30% compared to reverse-cycle systems, minimizing supply water temperature fluctuations during defrost cycles. For installations in areas with relative humidity consistently above 85% at temperatures between -2°C and 5°C, the optional enhanced defrost package with increased fin spacing is recommended.
