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Evidence Guide: UEERA0067 - Repair and service secondary refrigeration 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

 

UEERA0067 - Repair and service secondary refrigeration systems

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

Prepare to service secondary refrigeration system

  1. Type of secondary refrigeration system components and operation are identified
Type of secondary refrigeration system components and operation are identified

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

WHS/OHS requirements and workplace procedures and safety data sheets (SDS) are identified and risk control measures implemented, including wearing personal protective equipment (PPE)

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Safety hazards not previously identified are assessed, documented and risk control measures devised and implemented

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Extent of faults is determined from reports, documentation, observation and discussions with appropriate person/s

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Appropriate person/s is consulted to ensure the work is coordinated effectively with others involved on the worksite

Completed
Date:

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Tools, equipment and testing devices needed to carry out refrigeration work are obtained in accordance with workplace procedures and checked for correct operation and safety

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Carry out secondary refrigeration maintenance requirements

  1. WHS/OHS requirements, regulations, workplace procedures and risk control measures are followed
WHS/OHS requirements, regulations, workplace procedures and risk control measures are followed

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Components are checked and isolated in accordance with WHS/OHS requirements and procedures

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Refrigeration maintenance tests are performed on the primary cooling source, operating pressures, operating current, refrigerant charge, secondary flow rates and condenser cooling system, and system faults or non-compliance documented to operational specifications

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Refrigeration operational maintenance tests are performed on the secondary refrigerant pumping/circulation devices, pressure and flow rates recorded, and faults or non-compliance to system specification documented

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Chemical integrity, including the dilution rate, anti-bacterial and anti-corrosion rates of the secondary refrigerant, is checked using test kit and following approved WHS/OHS procedures, including PPE, and results or non-compliance are documented

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Secondary refrigerant pipe work is checked for leaks and stability and its insulation is checked for soundness

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Refrigeration system components, evaporators, blowers, other heat exchangers, heat recovery or defrost systems are checked for correct operation and cleanliness

Completed
Date:

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Control system operation, including safety controls and any faults or non-conformity to system specifications are documented in accordance with WHS/OHS guidelines and workplace practices

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Repair secondary refrigeration system

  1. Justification for solutions used to solve refrigeration system problems is documented in accordance with workplace procedures
Justification for solutions used to solve refrigeration system problems is documented in accordance with workplace procedures

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Repair work is documented and appropriate person/s notified in accordance with workplace procedures

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Repairs to refrigeration system components are performed to achieve compliance to design operation and manufacturer recommendations for effective operation

Completed
Date:

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Refrigeration control system are adjusted, as required, to achieve compliance to design operation and manufacturer recommendations for effective operation

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Record of flows, pressures and temperatures obtained before and after repair are compared to refrigeration specifications and contingency measures implemented, as required, to ensure compliance to design operation and manufacturer recommendations for effective operation

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Complete reports on refrigeration maintenance and repair activities

  1. Work area is cleaned and made safe in accordance with workplace procedures and practices
Work area is cleaned and made safe in accordance with workplace procedures and practices

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Refrigeration service/maintenance and repair activities on secondary refrigeration system and relevant non-compliance specification after repair are documented and reported to appropriate person/s

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Assessed

Teacher: ___________________________________ Date: _________

Signature: ________________________________________________

Comments:

 

 

 

 

 

 

 

 

Instructions to Assessors

Required Skills and Knowledge

Evidence required to demonstrate competence in this unit must be relevant to and satisfy all of the requirements of the elements, performance criteria and range of conditions on at least two separate occasions and include:

applying relevant legislation, industry standards and practices

applying relevant work health and safety (WHS)/occupational health and safety (WHS/OHS) requirements and workplace procedures and practices, including using risk control measures

applying sustainable energy principles and practices

servicing and repairing secondary refrigeration systems, including:

applying logical diagnostic methods

dealing with unplanned events/situations in accordance with workplace procedures in a manner that minimises risk to personnel and equipment

identifying faults and competency needed to rectify them

rectifying faults in system controls

using fault scenarios to test the cause of system faults

verifying that the system operates correctly.

Evidence required to demonstrate competence in this unit must be relevant to and satisfy all of the requirements of the elements, performance criteria and range of conditions and include knowledge of:

applicable standards and codes

basics of secondary refrigeration systems, including:

operation

applications

types and safe handling of secondary refrigerants,

need for use of anti-bacterial and corrosion inhibitor

use of personal protective equipment (PPE)

control system, pressure, temperature and safety

control valves, balance and operational

documentation and reports

maintenance procedures for secondary refrigeration systems

maintenance requirements, including pumps, chemical integrity of refrigerant, cooling coils/freezing coils operation, leak detection additives, leak testing, pipe work and insulation, control valves and control system

major components types, location, purpose, operation and safety

refrigerant disposal Environment Protection Authority (EPA) requirements

relevant job safety assessments or risk mitigation processes

relevant manufacturer specifications

relevant refrigeration system industry standards and codes of practice

relevant WHS/OHS legislated requirements

relevant workplace documentation

relevant workplace policies and procedures

repairs to secondary refrigerant systems, including:

cooling coils/freezing coils

system leaks, pipe work or insulation

control valves, control system components

chemical integrity of refrigerant

secondary refrigeration systems

service and repair of secondary refrigeration systems

tools and equipment for maintenance work.

Range Statement

Range is restricted to essential operating conditions and any other variables essential to the work environment.

Non-essential conditions may be found in the UEE Electrotechnology Training Package Companion Volume Implementation Guide.

Servicing and repairing secondary refrigeration systems must include at least two of the following system types:

chilled water or glycol/brine system

condenser water system

defrost system

heat recovery system

thermal storage system

Servicing and repairing secondary refrigeration systems must include the following components:

cycling controls

heat exchangers

primary refrigerant flow controls

pumps

safety controls

evaporators/cooling coils, forced and natural draft

secondary refrigerant flow controls

secondary refrigerant piping, insulation and associated equipment

Spparatus must include at least the following:

chilled water systems (primary system)

ice bank systems

Systems must include at least the following:

cool rooms

freezer rooms

merchandising and display cabinets

other commercial or industrial applications