Natural Gas – Non Domestic

Candidates must successfully complete the Non-Domestic Core Gas Safety (ACS) qualification COCN1 or CODNCO1 (Changeover) in order to undertake work with natural gas in a domestic environment and prior to any additional assessment natural gas fuelled installations and appliances.

This assessment takes the form of both written and practical exams covering the following:

Course Content

  • Gas safety regulations, Building Regulations, British Standards and other related legislation
  • Unsafe situations and emergency actions
  • Gas pipework (Including sizing, installation, defects and faults)
  • Tightness testing and purging (Covers both low pressure and medium pressure installations)
  • Checking meter regulator
  • Emergency control valves
  • Appliance burner pressures and gas rates
  • Flues and ventilation
  • Combustion
  • Combustion Performance Analysis (Flue gas testing)
  • Appliance controls

Course Content – Non-Domestic Gas Appliances

  • Gas safety regulations, Building Regulations, British Standards and other related legislation
  • Unsafe situations and emergency actions
  • Gas pipework (Specific to appliance category)
  • Flues and ventilation (Specific to appliance category)
  • Combustion (Specific to appliance category)
  • Combustion Performance Analysis (Flue gas testing)
  • Appliance controls (Specific to appliance category)
  • Commissioning, service, maintenance and basic gas safety related fault finding
  • Note: Training is not a pre-requisite to assessment

Who should attend?

Engineers who have the necessary qualifications to be admitted onto the ACS Scheme run by Strategic Management Board for the industry to enable registration with Gas Safe.

These engineers are classified into 2 categories

  • Category 1 – Experienced practicing gas fitting operative
  • Category 2 – Applicant with relevant mechanical engineering/fitting qualifications/experience

Commercial Core Options

Code Description
CoCDN1 Changeover from Commercial Natural Gas to Domestic Natural Gas
COCN1 Core Commercial Gas Safety Assessment Criteria
COCNPI1LS Core Commercial Gas Safety Criteria Pipe Installer/Commissioner
CoDNCO1 Changeover Domestic Natural Gas to Commercial

Commercial Appliances Options

Code Description
CDGA1 Install, Commission, Service, Repair and Breakdown of Commercial Direct Fired Heating Appliances & Equipment
CIGA1 Install, Commission, Service, Repair and Breakdown of Commercial Indirect Fired Heating Appliances and Equipment
CORT1 Install, Commission, Service, Repair and Breakdown of Gas Fired Commercial Overhead Luminous Radiant Plaque and Radiant Tube Heaters
ICAE1LS Limited Scope Operative Installation First Fix of Commercial Appliances/Equipment
ICPN1 Installation of Commercial Pipework (First Fix)
ICPN1LS Limited Scope Operative Installation of Commercial Pipework (First Fix)
TPCP1 Testing and Purging Commercial Pipework to the requirements of IGE/UP/1
TPCP1A  Testing and Purging Commercial Pipework to the requirements of IGE/UP/1A

What do I need to bring with me?

  • 2x Passport Sized Photographs
  • Original copies of expired/expiring ACS qualifications
  • Note taking material (recording devices not allowed)