Grant Atc Controller Hpas21X All Hpaw Models

Grant Atc Controller Hpas21X All Hpaw Models

Grant ATC Controller – HPAS21X

Genuine Grant ATC Control Board for All HPAW Air Source Heat Pump Models

The Grant HPAS21X ATC Controller is a genuine OEM control module designed for use across all models in the Grant Aerona³ HPAW (Heat Pump Air to Water) range. This intelligent controller plays a central role in managing heat pump operation—regulating temperatures, overseeing compressor activity, and coordinating defrost cycles and sensor inputs.

Whether you're replacing a faulty controller or upgrading your system for improved efficiency, the HPAS21X ensures precise and stable performance across all Grant air source heat pump installations.

Key Features & Benefits

• Official Grant OEM Part – HPAS21X
  Designed and approved by Grant UK for compatibility with all HPAW models (Aerona³ range).

• Advanced Temperature Control (ATC)
  Accurately manages heat output, compressor behaviour, and defrost cycles for optimal efficiency.

• Central Heat Pump Management
  Monitors real-time performance data from temperature sensors, flow switches, and thermostats.

• Supports Low-Temperature Heating Systems
  Ideal for underfloor heating, radiator systems, and hot water integration.

• Plug-and-Play Installation
  Supplied pre-configured for Grant heat pumps—minimising commissioning time.

• Improves System Reliability & Performance
  Helps maintain consistent operation, reduces energy consumption, and protects key components.

Compatible Grant Heat Pump Models

The HPAS21X ATC Controller is compatible with:

• ? All Grant Aerona³ R32 HPAW Models, including:

  • Aerona³ 6kW

  • Aerona³ 10kW

  • Aerona³ 13kW

  • Aerona³ 17kW

Need help identifying if this controller fits your unit? Just contact us with your model or serial number and we’ll confirm for you.

 When to Replace the ATC Controller

Replace the HPAS21X controller if:

• Your heat pump is unresponsive or showing irregular behaviour

• The controller is damaged, unresponsive to inputs, or displaying error codes

• You're upgrading system controls to ensure maximum efficiency and compatibility

• The existing control board is affected by electrical faults or moisture ingress

Maintaining a fully operational control board is essential for energy efficiency, safety, and year-round heat pump reliability.

 Technical Specifications

• Part Number: HPAS21X

• Manufacturer: Grant UK

• Component Type: Advanced Temperature Controller (ATC) / PCB

• Application: All Grant Aerona³ HPAW air-to-water heat pumps

• Installation: Internal (qualified installer required)

• Functionality: Controls compressor, heating demand, sensor input, defrost mode, and flow logic

• Interface: Digital display (model dependent), compatible with Grant heat pump control panels