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Evidence Guide: MEM18084 - Commission and decommission split air conditioning systems

Student: __________________________________________________

Signature: _________________________________________________

Tips for gathering evidence to demonstrate your skills

The important thing to remember when gathering evidence is that the more evidence the better - that is, the more evidence you gather to demonstrate your skills, the more confident an assessor can be that you have learned the skills not just at one point in time, but are continuing to apply and develop those skills (as opposed to just learning for the test!). Furthermore, one piece of evidence that you collect will not usualy demonstrate all the required criteria for a unit of competency, whereas multiple overlapping pieces of evidence will usually do the trick!

From the Wiki University

 

MEM18084 - Commission and decommission split air conditioning systems

What evidence can you provide to prove your understanding of each of the following citeria?

Determine job requirements

  1. Follow standard operating procedures (SOPs)
Follow standard operating procedures (SOPs)

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Comply with work health and safety (WHS) requirements at all times

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Use appropriate personal protective equipment (PPE) in accordance with SOPs

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Identify job requirements from specifications, drawings, job sheets or work instructions

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Determine the operating conditions of vapour compression systems

  1. Determine the actual and specified range of operating conditions from measured and calculated values using established procedures to determine as they apply to particular vapour compression systems
Determine the actual and specified range of operating conditions from measured and calculated values using established procedures to determine as they apply to particular vapour compression systems

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Establish operating conditions and record on commissioning documentation

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Obtain tools, equipment and testing devices needed to determine the basic operating conditions and check for correct operation and safety

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Recover refrigerants from split air conditioning systems

  1. Check for, and protect site from, ignition sources if R32 or other flammable refrigerants are used
Check for, and protect site from, ignition sources if R32 or other flammable refrigerants are used

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Isolate circuits/appliances in strict accordance with work health and safety (WHS) requirements and procedures, where necessary

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Remove refrigerants safely into suitably labelled containers in accordance with legislative and industry requirements

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Deal with contaminated refrigerant in accordance with requirements

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Pressure and leak test split air conditioning systems

  1. Identify and note safety hazards and implement established risk control measures
Identify and note safety hazards and implement established risk control measures

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Follow industry codes of practice and manufacturer installation instructions

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Take precautions to prevent damage to components while pressure testing the system

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Conduct pressure testing at a pressure compatible with the refrigerant to be used

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Located leak, isolate and repair using methods appropriate to the system type under test and in accordance with industry practices

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Evacuate split air conditioning systems

  1. Note safety hazards which have not previously been identified, and implement established risk control measures
Note safety hazards which have not previously been identified, and implement established risk control measures

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Evacuate the system to the required level and clean the system of all moisture and other containments in accordance with requirements

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Apply a standing vacuum test in accordance with industry codes of practice and applicable standards

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Charge split air conditioning systems

  1. Select correct refrigerant for the system, in accordance with manufacturer requirements and industry practices
Select correct refrigerant for the system, in accordance with manufacturer requirements and industry practices

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Measure the refrigerant charge by weight in accordance with manufacturer specifications

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Charge the system in accordance with manufacturer requirements and industry practices

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Check all components and maintain in accordance with manufacturer requirements

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Test the operation of split air conditioning systems

  1. Start and operate the system
Start and operate the system

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Carry out standard tests to confirm system performance to manufacturer specifications

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Check the refrigerant charge and add refrigerant, if required

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Record test data, as required

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Complete the commissioning/ recommissioning of split air conditioning systems

  1. Ensure the worksite is cleaned and left in presentable condition in accordance with original presentation, client requirements, industry standards and organisational requirements
Ensure the worksite is cleaned and left in presentable condition in accordance with original presentation, client requirements, industry standards and organisational requirements

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Undertake final inspections to ensure installation conforms to industry, legislative and work order requirements

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Instruct the client on the use of the product in accordance with organisational requirements and manufacturer specifications

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Complete certificates of compliance and other relevant commissioning documentation and process in accordance with state/territory regulatory requirements

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Decommission split air conditioning systems

  1. Electrically disconnect plug in appliance
Electrically disconnect plug in appliance

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Recover refrigerants, store and dispose of in accordance with legislative and industry requirements

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Remove units and components and dispose of safely and in accordance with regulations, industry codes of practice and sustainable environmental practices

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Clean the worksite and leave in presentable condition, to client and organisational requirements, industry standards and sustainable environmental practices

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Complete decommissioning documentation and process in accordance with state/territory regulatory requirements

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Assessed

Teacher: ___________________________________ Date: _________

Signature: ________________________________________________

Comments:

 

 

 

 

 

 

 

 

Instructions to Assessors

Required Skills and Knowledge
Range Statement

This field allows for different work environments and conditions that may affect performance. Essential operating conditions that may be present (depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts) are included.

Tools, equipment and testing devices include one (1) or more of the following:

refrigeration gauge manifold

Schraeder access valves; quick connect couplings, and thermometer/thermocouple temperature measuring devices

analogue and digital vacuum measuring gauges

digital scales

refrigerant recovery unit

vacuum pump

electronic leak detectors

refrigerant containers/cylinders

Legislative and industry requirements include one (1) or more of the following:

Commonwealth, state and territory legislation, regulations, standards and industry codes of practice

The Ozone Protection and Synthetic Greenhouse Gas Legislation Amendment Bill 2003

air conditioning residential best practice guidelines (AIRAH)

AIRAH flammable refrigerants fact sheets and guide

state/territory and local building regulations

sustainable environmental practices for commissioning and decommissioning split air conditioning

System performance includes one (1) or more of the following:

pressure

temperature

sub-cooling

superheating

evaporator coil to air temperature difference