Framework · CCN1

ACS CCN1: Core domestic natural gas safety

Areas follow the 16 numbered sections of the ACS CCN1 safety assessment criteria, Issue 16 (initial and re-assessment). Section 16 applies to re-assessment only. Certification bodies may number and word their criteria differently, so check your own body's documents for criterion references.

CCN1 area	Modules	Artefacts
1. Gas safety legislation and standards	M01Gas safety legislation & the industry	Who is responsible? From the main to the applianceLivein M01
2. Gas emergency actions and procedures	M02Properties of gas & combustion M14Unsafe situations & emergencies	Responding to a smell of gasArtefact pendingin M14 Unsafe situation classifierArtefact pendingin M14
3. Products and characteristics of combustion	M02Properties of gas & combustion M10Combustion performance & CO	Pre-aerated burner and flame pictureArtefact pendingin M02 CO alarm sitingArtefact pendingin M10 Carbon monoxide build-up in a roomArtefact pendingin M10 Carbon monoxide exposure and the bodyArtefact pendingin M02 Air, gas and the products of combustionLivein M02 Flue gas analyserArtefact pendingin M10
4. Ventilation	M08Ventilation	Compartment ventilationArtefact pendingin M08 Extract fans and spillageArtefact pendingin M08 Room ventilation requirementsArtefact pendingin M08
5. Installation of pipework and fittings	M05Installation pipework & fittings M07Equipotential bonding & electrical safety	Temporary continuity bondingArtefact pendingin M07 Pipe sizing workbenchArtefact pendingin M05 Pipes in floors and joistsArtefact pendingin M05 Pipe sleeved through a cavity wallArtefact pendingin M05
6. Tightness testing and purging	M06Tightness testing & purging	Installation and purge volumesArtefact pendingin M06 Tightness test simulatorArtefact pendingin M06
7. Checking and/or setting meter regulators	M03Pressure, flow & measurement M04Gas supply, meters & regulators	Diaphragm gas meter cutawayLivein M04 Emergency control valveLivein M04 Gas rate and heat input calculatorLivein M03 Manometers on a test pointArtefact pendingin M03 A complete meter installationLivein M04 Domestic meter regulatorLivein M04 Pressure loss across an installationArtefact pendingin M03
8. Unsafe situations, emergency notices and warning labels	M14Unsafe situations & emergencies	Responding to a smell of gasArtefact pendingin M14 Unsafe situation classifierArtefact pendingin M14
9. Operation and positioning of emergency isolation controls and valves	M04Gas supply, meters & regulators	Diaphragm gas meter cutawayLivein M04 Emergency control valveLivein M04 A complete meter installationLivein M04
10. Checking and setting appliance burner pressures and gas rates	M03Pressure, flow & measurement M12Commissioning, servicing & relighting	Setting burner pressureArtefact pendingin M12 Gas rate and heat input calculatorLivein M03 Manometers on a test pointArtefact pendingin M03 Pressure loss across an installationArtefact pendingin M03 Relighting after a supply interruptionArtefact pendingin M12 Gas safety inspection checklistArtefact pendingin M12
11. Operation and checking of appliance gas safety devices and controls	M11Gas safety devices & controls	Air pressure switch and fan provingArtefact pendingin M11 Flame rectificationArtefact pendingin M11 Multifunctional gas valveArtefact pendingin M11 Atmosphere-sensing pilotArtefact pendingin M11 Safe isolation sequenceArtefact pendingin M07 Thermocouple flame supervision deviceArtefact pendingin M11
12. Chimney standards	M09Chimneys & flues	Flue flow testArtefact pendingin M09 How an open flue worksArtefact pendingin M09 Room-sealed balanced flueArtefact pendingin M09 Spillage testArtefact pendingin M09 Flue terminal positionsArtefact pendingin M09
13. Chimney inspection and testing	M09Chimneys & flues	Flue flow testArtefact pendingin M09 Spillage testArtefact pendingin M09
14. Installation of open, balanced and fan-assisted chimneys	M09Chimneys & flues
15. Re-establishing the gas supply and relighting appliances	M12Commissioning, servicing & relighting	Setting burner pressureArtefact pendingin M12 Relighting after a supply interruptionArtefact pendingin M12 Gas safety inspection checklistArtefact pendingin M12
16. Inspecting, testing, commissioning and maintaining appliances (re-assessment only)	M12Commissioning, servicing & relighting M13Domestic appliances