NZQA registered unit standard
21454 version 4
Page 1 of 4
Title
Operate refrigeration equipment in an energy and chemical plant
Level
4
Purpose
Credits
10
This unit standard is for people working as boiler operators and
energy and chemical process operators in an energy or
chemical plant.
People credited with this unit standard are able to: demonstrate
knowledge of refrigeration systems used in the energy and
chemical industry, and the operation of refrigeration equipment
in an energy and chemical plant; and operate refrigeration, in
an energy and chemical plant.
Classification
Energy and Chemical Plant > Operation of Energy and
Chemical Plant
Available grade
Achieved
Explanatory notes
1
Assessment conditions
All assessment must be carried out at an energy or chemical site.
2
Definitions
Energy and chemical plant may be in – petrochemical, agri-nutrient, power
generation, dairy processing, meat processing, and wood fibre manufacturing, or
other plants that operate with a combination of high temperatures, pressures, steam
and/or chemicals in gas, liquid or solid form.
Organisational requirements – documented policies and procedures. These may
include: equipment manufacturers’ procedures, plant procedures, suppliers’
instructions, site signage, codes of practice, company health and safety plans, on site
briefings, and supervisor’s instructions. This includes all regulatory and legislative
obligations that apply to the plant.
Plant – the operational unit, equipment and/or workplace at which the person is
working.
Process disruptions – process deviations or equipment malfunctions.
3
Legislation relevant to this unit standard includes but is not limited to – Hazardous
Substances and New Organisms Act 1996, Health and Safety in Employment Act
1992, Resource Management Act 1991.
Primary Industry Training Organisation
SSB Code 101558
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
21454 version 4
Page 2 of 4
Outcomes and evidence requirements
Outcome 1
Demonstrate knowledge of refrigeration systems used in the energy and chemical
industry.
Evidence requirements
1.1
Refrigeration systems in the energy and chemical industry are explained in
terms of operating and design concepts.
Range
1.2
Components of refrigeration systems in the energy and chemical industry are
explained in terms of purpose and operating concepts.
Range
1.3
refrigerants include but are not limited to – ammonia,
fluorocarbons.
Refrigerant systems in the energy and chemical industry are explained in terms
of the safety requirements.
Range
1.5
components include but are not limited to – drier, evaporator,
condenser, oil separator, expansion valve, temperature regulating
valve, regulator, liquid receiver, compressors, safety device.
Refrigerants used in the energy and chemical industry are explained in terms of
their potential hazards, use, chemical properties.
Range
1.4
refrigeration systems include but are not limited to – mechanical
absorption, vapour compression.
safety requirements include but are not limited to – chemical data
sheets, safety equipment, safety procedures.
Potential causes of operational problems are described in terms of the
operational steps and techniques required to avoid them.
Range
operational problems include but are not limited to – leakage,
freeze up, liquid carry over, blocked strainers, non condensable
gas in system, water in system, over charge, under charge.
Outcome 2
Demonstrate knowledge of the operation of refrigeration equipment in an energy and
chemical plant.
Primary Industry Training Organisation
SSB Code 101558
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
21454 version 4
Page 3 of 4
Evidence requirements
2.1
Start-up procedures are explained in terms of organisational requirements.
2.2
Routine shut-down procedures are explained in terms of organisational
requirements.
2.3
Emergency shut-down procedures are explained in terms of organisational
requirements.
2.4
Control and protection systems for the refrigeration equipment are identified and
described in terms of their purpose.
Range
evidence is required of one control system and one protection
system.
Outcome 3
Operate refrigeration equipment in an energy and chemical plant.
Evidence requirements
3.1
Safe work practices are used when operating refrigeration equipment in
accordance with organisational requirements.
3.2
The location of the refrigeration equipment is identified in accordance with the
site specific identification coding system.
3.3
Routine procedures and checks on refrigeration equipment are carried out in
accordance with organisational requirements.
3.4
Refrigeration equipment process disruptions are identified and correct actions
are taken in accordance with organisational requirements.
Range
3.5
evidence is required of two different types of equipment disruption.
All plant documentation related to the process and equipment operation is
completed in accordance with organisational requirements.
Planned review date
31 December 2019
Primary Industry Training Organisation
SSB Code 101558
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
21454 version 4
Page 4 of 4
Status information and last date for assessment for superseded versions
Process
Version Date
Last Date for Assessment
Registration
1
27 June 2005
31 December 2014
Rollover and
Revision
2
25 July 2006
31 December 2014
Review
3
22 May 2009
31 December 2016
Review
4
24 October 2014
N/A
Consent and Moderation Requirements (CMR) reference
0079
This CMR can be accessed at http://www.nzqa.govt.nz/framework/search/index.do.
Please note
Providers must be granted consent to assess against standards (accredited) by NZQA,
before they can report credits from assessment against unit standards or deliver courses
of study leading to that assessment.
Industry Training Organisations must be granted consent to assess against standards by
NZQA before they can register credits from assessment against unit standards.
Providers and Industry Training Organisations, which have been granted consent and
which are assessing against unit standards must engage with the moderation system that
applies to those standards.
Requirements for consent to assess and an outline of the moderation system that applies
to this standard are outlined in the Consent and Moderation Requirements (CMR). The
CMR also includes useful information about special requirements for organisations wishing
to develop education and training programmes, such as minimum qualifications for tutors
and assessors, and special resource requirements.
Comments on this unit standard
Please contact the Primary Industry Training Organisation standards@primaryito.ac.nz if
you wish to suggest changes to the content of this unit standard.
Primary Industry Training Organisation
SSB Code 101558
 New Zealand Qualifications Authority 2016