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Course overview

CCN1 & Appliances Re-assessment Package Course Overview

This course in Edinburgh is tailored for gas engineers renewing their domestic ACS accreditation. Eligibility for re-assessment requires:

  • Current ACS certification, or
  • If expired, the re-assessment must be undertaken within 12 months post-expiry of existing qualifications.

Engineers whose ACS has expired over 12 months ago are required to enroll in the CCN1 & Appliance Initial Package Course.

Effective from 1st September 2022, engineers must be registered on the Gas Safe Register for at least 12 months to add new appliances to their initial registration.

The Domestic ACS Refresher Package (CCN1 & Appliances) provides both training and re-assessment in the following areas:

  • CCN1 – Core Domestic Natural Gas Safety
  • CPA1 – Combustion Performance Analysis
  • CENWAT – Domestic Gas Central Heating Boilers & Water Heaters
  • HTR1 – Domestic Gas Fires & Wall Heaters
  • CKR1 – Domestic Gas Cooking Appliances

Note: Adding appliances for the first time requires additional training in a realistic working environment, incurring extra costs.

Modules breakdown

Domestic ACS Refresher Package (CCN1 & Appliances) Course Content

The training in Edinburgh for the Domestic ACS Refresher Package includes a comprehensive overview of key aspects essential for gas engineers:

  • Gas Safety Legislation and Standards
  • Procedures for Gas Emergencies
  • Combustion Characteristics and Products
  • Ventilation Requirements
  • Installation of Gas Pipework and Fittings
  • Methods for Tightness Testing and Purging
  • Techniques for Checking and/or Setting Meter Regulators
  • Identifying and Handling Unsafe Situations, including Emergency Notices and Warning Labels
  • Management of Emergency Isolation Controls and Valves
  • Procedures for Checking and Setting Appliance Burner Pressures and Gas Rates
  • Examination and Functionality Checks of Appliance Gas Safety Devices and Controls
  • Standards for Chimneys
  • Chimney Inspection and Testing
  • Installation Procedures for Open, Balanced, and Fan-Assisted Chimneys
  • Re-establishing Gas Supply and Relighting Appliances

Assessment Methodology

  • Multiple-choice theory
  • Written theoretical assessments
  • Practical assessments


Upon successful completion, participants will be awarded the LCL Awards Certificate in (CCN1) and for the re-assessment appliances covered.

Some of our clients who trust us with their training:

Very positive feedback from all staff who were on the training, great trainers and they made the topic interesting and easy to understand.

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Other Information

CCN1 Gas Safety Training Manuals

Upon commencing their course in Edinburgh, participants will receive an LCL Awards Domestic Gas Safety Training Guide.

Essentials to Bring

Attendees are required to bring:

  • A passport-sized photo (if not previously provided)
  • Official Identification (Passport or Driving Licence)
  • Documentation of previous qualifications, e.g., ACS or plumbing certificates

Distribution of manuals occurs on the first day of the course.

Booking Procedure

To reserve a spot, please phone our office at 0808 164 2780. Our amiable customer support staff will assist with choosing suitable dates and confirm availability. Payment can be made using a debit or credit card to secure your enrollment.