ISO 22712:2023

Overview - ISO 22712:2023 (Refrigerating systems and heat pumps - Competence of personnel)

ISO 22712:2023 defines competence profiles and evaluation criteria for personnel who carry out activities on refrigerating circuits in refrigerating systems and heat pumps. It aligns with established system safety standards (ISO 5149 series and EN 378 series) and covers lifecycle tasks from design and installation to decommissioning and dismantling. The standard focuses on competence of personnel, not on electrical or electronic work, and it explicitly does not constitute a training programme.

Key technical topics and requirements

• Scope and exclusions

  • Applies to activities on the refrigerating circuit per ISO 5149‑1 to ‑4 and equivalent EN 378 parts.
  • Excludes electrical/electronic systems; national regulations or other standards apply for electrical competence.
  • Excludes work on self‑contained refrigeration products where manufacturing controls and statutory conformance are ensured.

• Competence areas (Annex A)

  • Basic thermodynamics (pressure‑enthalpy, log p/h diagrams, refrigerant properties)
  • Components and tests (compressors, condensers, evaporators, pressure vessels)
  • Piping, joints and valves (installation, leak checking, pressure testing)
  • Safety equipment (relief devices, ventilation, detection)
  • Fluids (refrigerant handling, removal, classification - HFCs, NH3, CO2, flammable refrigerants)
  • Communication (documentation, reporting, safety information)

• Competence levels

  • BA - Basic appreciation
  • WK - Working knowledge
  • FO - Fully operational
  • LE - Leading edge (development/expert)
  • Assessment may be theoretical or practical as indicated in the normative tables.

• Evaluation procedures

  • Use national evaluation procedures where available; ISO/IEC 17024 is referenced if no national scheme exists.
  • Annexes provide guidance and examples (e.g., HFCs under EU Regulation No 517/2014, conversion guidance for R‑717 (NH3), R‑744 (CO2), and flammable refrigerants).

Practical applications - who uses ISO 22712:2023

• HVAC‑R employers and service companies to define job descriptions and hiring requirements.
• Certification bodies and assessors establishing competence assessments and schemes.
• Training providers to map curricula to competence criteria (note: the standard itself is not a training programme).
• Regulatory agencies and safety managers for workforce competence verification and compliance.
• Designers, commissioning engineers, maintenance technicians and decommissioning teams working with refrigerating systems and heat pumps.

Related standards

• ISO 5149‑1/2/3/4 - Safety and environmental requirements for refrigerating systems and heat pumps
• EN 378‑1/2/3/4 - Equivalent European standards
• ISO/IEC 17024 - Conformity assessment for personnel certification schemes (referenced for evaluation procedures)
• EU Regulation No 517/2014 - Example guidance for HFC assessment schemes (see Annex C)

ISO 22712:2023 is essential for organizations seeking to ensure safe, environmentally responsible and competent handling of refrigerating systems and heat pump circuits, improving compliance, safety and operational reliability.