Refrigeration & Air Conditioning - Level 3 (large complex systems)

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Network: 
Refrigeration Skillnet
Location of Course Refrigeration Skillnet Training Centre, Northwest Centre, Blanchardstown
Trainer South Easter Regional College (SERC) Refrigeration Skillnet
Methods of Assessment The outcome of this unit will be assessed multiple by two multiple choice assessment papers.
There will be two tests synoptically written which will cover the content of the four outcomes.
These written tests will be externally set and externally marked.
Learning Outcomes 1. Energy and the Environment
a) Calculate TEWI (Total Environmental Warming Impact)
b) Compare and contrast TEWI for a variety of different refrigerants applied to the same cooling capacity and operating temperatures.
c) Describe the methods to improve energy efficiency on existing systems within the range.

2. Cooling Systems and Technology
a) Describe system layout and operating principles for multi compressor pack systems with capacity control.
b) Describe system layout and operating principles for multi evaporator systems with independent control for each evaporator.
c) Explain the principles of:
- oil separation, recovery and rectification
- hot ‘gas’, saturated ‘gas’ and electric defrost systems
- pumped liquid recirculation systems
- variable refrigerant volume/flow systems
d) Describe the main operating features and characteristics of each of the following compressor systems.
- screw
- scroll
- centrifugal
- rotary
e) Describe the features and characteristics of expansion devices in current use.
f) Describe the operating principles and application of suction pressure, evaporating pressure and crankcase pressure regulating valves
g) Describe the system layout and operating principles for water chilling systems
h) Describe the system layout and operating principles for central air conditioning systems

3. Cooling Science and Calculations
a) Compare and contrast system performance at a variety of conditions using pressure enthalpy diagrams.
b) Compare and contrast air conditioning processes using the psychrometric chart
c) Apply equipment and components to cooling applications to allow system selection, design and balancing to be carried out
d) Describe the effect of heat and vapour transfer to insulated structures
e) Compare and contrast the use of different refrigerant types in cooling applications
f) Explain the features and characteristics of zeotropic blends, azeotropes and single fluid refrigerants.
g) Assess heat loads to insulated cooled applications
h) Explain Dalton’s Law of Partial Pressures
i) Describe Boyles Law Charles’ Law and the Combined Gas Equation.

4. Cooling System Electrics, Electronics and Controls
a) Describe electrical circuits for systems in the range
b) Explain the principles of electronic monitoring systems (EMS) and building monitoring systems (BMS). c) Describe the principles of single phase and three phase motor and motor control and protection circuits.
d) Describe the requirements of the Electricity at Work Regulations and the Institute of Electrical Engineering Regulations.
e) Trace and explain electrical circuit diagrams for systems in the range.

Eligibility This course is open to trainees with experience in the Refrigeration and Air conditioning industry.
Further Enquiries Tel: 01 885 5200
Email: info@refrigerationskillnet.ie
Entry Requirements City & Guilds 6127 Level 2 & City & Guilds 2079 C(Cat I) or City & Guilds 2079(Cat I)& 3 year industry experience & Level 3 Percussive Course
Careers or Further Progression Level 3 Certificate in Refrigeration and Air Conditioning
C&G2079 F-Gas Regulations
Course Content Certificate in Refrigeration & Air Conditioning - Level 3 (large complex systems):
The aim of this course is to provide the learner with the knowledge and skills to select, install, commission, maintain and service refrigeration plant used in large and complex commercial refrigeration, air conditioning and heat pump equipment.

Through our innovative blended learning programme, training is delivered over 12 fortnightly 2 day sessions, thus reducing workplace absence though:
Self learning materials
Online support
1:1 tutorials
Group tutorials
Practical workshops

Financial Support Subsidised for Refrigeration Skillnet member companies. Fully subsidised for job-seekers
Enrolment and Start Dates Comment To book: http://alturl.com/snmh9
Subjects Taught 1. Compare and contrast factors which affect energy efficiency and total environmental
warming impact.
2. Describe complex cooling system technology
3. Use applied cooling science to carry out load, performance and equipment selection calculations.
4. Describe and explain cooling system electrotechnics and control.

This course extends the knowledge and understanding required for units:
1. Maintain safe working environment for HVACR activities
2. Maintain effective working relationships
3. Contribute to the improvement of business products and services for HVACR activities.
10. Plan complex RAC work activities
11. Commission and de-commission complex RAC systems
12. Install complex RAC systems and components
13. Service and maintain complex RAC systems and components

Duration 28 weeks
Comment See also Level 3 Percussive Course
Level 2 Certificate in Refrigeration & Air Conditioning
Course Web Page: 
http://www.refrigerationskillnet.ie/
Available to Job Seekers: 
Yes
Certified: 
Yes