Content

This course will allow attendees a thorough understanding of transcritical refrigeration systems as well as allowing them to have an awareness of the specific requirements of working with high pressure refrigerants.

This qualification incorporates the safe use of CO2 high pressure refrigeration systems and is designed to meet the legal requirements of learners who work or intend to work with high pressure refrigerants.

The aim of this qualification is to provide the learner with the knowledge and skills to install, service, maintain, commission, de-commission and leak checking of RACHP equipment that contains R744 (CO2).

The qualification covers the safe use of “Oxy-Fuel” brazing equipment used for the installation, replacement or de-commissioning of CO2 equipment and components.

Course Covers

Understand the properties of CO2 R744 including:
- State of matter, changes of states;
- Characteristics;
- Refrigerant comparisons between HFC, HFO, HC and R744;
- Super critical, trans critical and sub critical.

Produce a suitable risk assessment of the installation to identify any factors which may impact upon the work.

Produce a suitable method statement to confirm that relevant people have been provided with job information (as appropriate) and identify points within the work process when liaison with identified relevant persons may be necessary.

Use manufacturers instructions, regulations and industry standards to determine requirements for systems and components, including procedure to:
- Confirm that components have suitable pressure ratings for carbon dioxide systems and are suitable for use;
- Confirm that fittings have suitable pressure ratings for carbon dioxide systems are suitable for use;
- Determine strength test pressure(s) from the system maximum allowable pressure(s);
- Determine tightness test pressure(s) from the system maximum allowable pressure(s).

Demonstrate procedures for testing commercial CO2 refrigeration systems including:
- Establishing system allowable pressure(s);
- Conducting a strength pressure test;
- Conducting a tightness pressure test.

Demonstrate procedures for charging commercial CO2 refrigeration systems including:
- Evacuating a system;
- Breaking a vacuum with carbon dioxide vapour;
- Charging a system with oil;
- Charging a system with carbon dioxide liquid.

Demonstrate procedures for adjusting system operating parameters through:
- Adjusting safety and system controls;
- Additional refrigerant as required;
- Additional oil as required;
- Safely vent CO2, avoiding deposition “dry ice”.

Course Objectives

At the end of the course, the learner will be able to :

- Plan and prepare for the installation and commissioning of commercial CO2 refrigeration systems;
- Carry out the installation of commercial CO2 refrigeration systems;
- Carry out the commissioning of commercial CO2 refrigeration systems;
- Carry out the de-commissioning of commercial CO2 refrigeration systems.

Who should attend?

The course is aimed at:

Those wishing to update occupational competence, continuous professional development and / or obtaining a licence to practice;

Those preparing for further learning or training and/or developing knowledge and or skills in a subject area who are existing workers in the occupation seeking to extend their range of work.

Learners must hold a formal Regulated Qualification in F-Gas: Install, Service, Maintain, Recovery, Decommission and Leakage Checking of Systems (Category I) ideally less than 5 years old or alternatively supply evidence of CPD, for example attendance of manufacturers training course or auditable evidence of working with CO2 for a minimum period of 2 years.

Learners are required to have a brazing certificate.

Certification

LCL Awards - Level 3 Qualification

CO2 On-line theory test - 75% pass rate, 14 questions (45 minutes)
Brazing On-line theory test - 75% pass rate, 15 questions (30 minutes)

Practical Assessment
Open Book
Certificate Issued