A-Combo80

High‑Temperature R290 Air Source Heat Pump

4‑Pipe High‑Temperature R290 Heat Pump‑Chiller

The Dethermina A‑COMBO80 is a single‑stage, high‑temperature 4‑pipe air source heat pump‑chiller using natural refrigerant R290 (propane). It delivers simultaneous high‑temperature heating up to 80°C and chilled water production, even in low ambient conditions down to ‑20°C. The A‑COMBO80 is designed for boiler and chiller replacement applications where year‑round heat recovery can be utilised to maximise system efficiency. The range is fully supported in the UK by Pure Thermal.

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Range Overview:

  • 4-Pipe Simultaneous Functionality
  • Max Output Temperature: 80°C
  • 10°C Standard Delta T Capability
  • Min External Temperature: -20°C
  • Minimum Cooling Output Temperature: -10°C
  • Nominal Capacity: 300kW
  • Range Options: 4
  • Refrigerant: R290 (Natural/GWP = 3)
  • 80°C — Delivering 80°C at -20°C external temperature
  • -20°C — Minimum External Operating Temperature. Full performance maintained.
  • 40 bar — Operating Pressure. K65 copper alloy pipework.
  • 4-Pipe Simultaneous — Configuration: Optimised Defrost. Low Energy Defrost Operation.

Key Technical Capabilities:

80°C High‑Temperature Output – Single Stage

  • Produces 80°C leaving hot water at ambient temperatures down to ‑20°C.
  • Typical operating duty of 80/60°C without cascade or booster stages.

Twin Refrigeration Circuits with Active Defrost Stability

  • Two independent refrigeration circuits per unit.
  • Allows continued heating and cooling output during defrost events.

Modular & Multi‑Unit System Architecture

  • Designed for scalable, parallel multi‑unit applications.
  • High redundancy and excellent part‑load performance.
  • System turndown as low as approximately 4–4.5% when correctly designed.

High‑Pressure, High‑Temperature Refrigeration System

  • Operating pressures up to 40 bar with K65 copper pipework rated to 130 bar.
  • Enables combined high‑temperature heating and chilled water production.

Inverter‑Driven Modulation & Heat Recovery Efficiency

  • Independent inverter control on each compressor.
  • System efficiencies exceeding 500% achievable during heat‑recovery operation.

Multi‑Unit Defrost Management (MUDM)

  • Defrost cycles coordinated across multiple units.
  • Maintains load continuity in large‑scale simultaneous heating and cooling systems.

Natural Refrigerant – R290 (Propane)

  • GWP of 3 and F‑Gas free refrigerant selection.
  • Supports long‑term environmental compliance.

Frascold R290‑Optimised Compressors

  • Semi‑hermetic inverter‑driven reciprocating compressors.
  • Designed for heat recovery operation and high discharge temperatures.

ATEX & DSEAR‑Aligned Safety Systems (Standard)

  • Integrated refrigerant leak detection and ATEX ventilation.
  • Fully ATEX‑rated refrigerant components supporting DSEAR requirements.

Simultaneous Heating & Cooling – 4‑Pipe Operation

The A‑COMBO80 can deliver 80°C heating and chilled water simultaneously, recovering waste heat from cooling processes and significantly improving overall system efficiency. This makes the unit particularly suitable for applications with concurrent heating and cooling demand such as data centres, food and beverage processing, and commercial buildings with year‑round loads.

Positioning Summary

True 4‑pipe high‑temperature heat pump‑chiller delivering simultaneous heating and cooling. Exceptional heat‑recovery performance, modular scalability, and full UK support from Pure Thermal.