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Evidence Guide: UEERA0080 - Select basic commercial refrigeration system equipment, components and accessories

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

 

UEERA0080 - Select basic commercial refrigeration system equipment, components and accessories

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

Identify commercial refrigeration system equipment and components

  1. Extent and nature of refrigeration installation is determined from job specifications
Extent and nature of refrigeration installation is determined from job specifications

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Refrigeration system safety and regulatory compliance requirements are identified and applied

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Develop refrigeration pipe work arrangements

  1. Location of refrigeration equipment is determined from regulatory requirements, job specifications and site drawings
Location of refrigeration equipment is determined from regulatory requirements, job specifications and site drawings

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Refrigeration piping is arranged to ensure safe and functional operation of the system

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Pipe work is arranged to comply with technical industry standards, job specifications and requirements

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Select commercial refrigeration system equipment and components

  1. Pipe and tubing are selected for suitability for the commercial environments it is to be installed
Pipe and tubing are selected for suitability for the commercial environments it is to be installed

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Pipe and tubing are sized to meet refrigeration parameters and capacity requirements for the refrigerant to be used

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Pipe and tubing quantities are determined from equipment location diagrams and job specifications

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Refrigeration system equipment and components are selected to meet load requirements based on calculated or deemed-to-comply solutions

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Refrigerant liquid expansion valves are selected to meet functional, specified and regulatory requirements

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Automatic control devices are selected to meet functional, specified regulatory requirements, current voltage and ingress protection (IP) ratings

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Evidence is obtained that the selected refrigeration equipment and components comply with job requirements and industry standards

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Document selection of system equipment and components

  1. Reasons for selections made including calculations are documented in accordance with workplace procedures
Reasons for selections made including calculations are documented in accordance with workplace procedures

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Refrigeration installation arrangements and specifications for selected items are documented in accordance with workplace procedures and forwarded 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 one occasion and include:

arranging pipe work to comply with regulatory and functional requirements

selecting appropriate type, size and quantity of pipe and tubing

selecting refrigeration equipment and components that meets load requirements

selecting automatic control devices that meet functional and regulatory requirements

documenting pipe work arrangement, specification for items selected and reasons for the selections made

dealing with unplanned events

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

applying sustainable energy principles and practices.

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:

basic commercial refrigeration system equipment, components, accessories selection, piping selection, safe working practices and relevant standards, codes and regulations, including:

calculation of capacity in heat exchangers:

Q = UA (LMTD)

Q = mc∆t

Q = m ∆h

evaporators:

commercial types and applications

coil bypass factor

effects of evaporator TD on space humidity

effects of air circulation on product conditions

selection criteria and selection tables

condensers:

commercial types and applications

effects of ambient conditions

condenser control

heat rejection factor

condenser TD

selection criteria and selection tables

compressors:

types and applications

capacity

displacement

volume flow rate

theoretical capacity

total volumetric efficiency

effect of operating conditions, including suction pressure drop and superheating

actual capacity

power

theoretical requirement

effects of operating conditions

actual requirements

post defrost loads

pull down torque requirements, high, medium and low back pressure compressors

selection tables, motor selection

refrigerant flow controls:

types, operation and applications

effects from sub-cooling

distributor types, operation and applications

selection tables

system load balance point:

graphical representation

line sizing and design:

quick selection tables

velocity tables

pressure drop in lines and fittings

oil migration stabilisation

refrigerant velocity

effect of varying system capacity

oil traps

risers

liquid migration

automatic controls:

fin spacing, suction temp to evaporator suction

hot-gas bypass valves

electronic control of valves programmable logic controller (PLC) control

refrigerant regulating valves

solenoid valves

condenser pressure regulating valves

evaporator pressure regulating valves

crankcase pressure regulating valves

cycling controls

pressure-stats

thermostats

defrost controls

monitoring and alarm controls

refrigeration automation systems

control strategies

control modes

relevant industry standards, including industry practices and technologies

relevant job safety assessments or risk mitigation processes

relevant manufacturer specifications

relevant WHS/OHS legislated requirements

relevant workplace documentation

relevant workplace policies and procedures.

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.

Selecting commercial refrigeration system equipment and components, pipe work and controls must include at least the following:

two different refrigeration systems, including:

refrigerant

condensing unit

evaporator

refrigerant controls

accessories

refrigerant and condensate pipe work

system controls