NZQA registered unit standard
21462 version 4
Page 1 of 4
Title
Demonstrate knowledge of the basic equipment and systems used
for steam generation in a boiler operation
Level
3
Credits
Purpose
8
This theory-based unit standard is for entry-level people
working as boiler operators.
People credited with this unit standard are able to demonstrate
knowledge of: steam generation equipment and fittings;
combustion air equipment; steam generation fuel systems; and
feedwater equipment and layup, in boilers.
Classification
Energy and Chemical Plant > Operation of Energy and
Chemical Plant
Available grade
Achieved
Explanatory notes
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.
Outcomes and evidence requirements
Outcome 1
Demonstrate knowledge of steam generation equipment and fittings in boilers.
Evidence requirements
1.1
Boilers are identified and described in terms of design and operating principles.
Range
1.2
boilers include but are not limited to – water tube, shell or fire tube,
combination fire tube- water tube, once-through coil, condensing.
Components of steam generating equipment are described in terms of function.
Range
components include but are not limited to – economiser, air
heater, superheater, steam drum internals, flue stream equipment.
Primary Industry Training Organisation
SSB Code 101558
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
1.3
Boiler mountings are identified and explained in terms of their purpose.
Range
1.4
boiler mountings include but are not limited to – safety valves, feed
check valve, blowdown valve, air vent, main stop valve, access
doors.
Boiler instrumentation is explained in terms of boiler operations.
Range
1.5
21462 version 4
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instrumentation includes but is not limited to – pressure gauge,
gauge glasses, operational controls, safety controls.
Boiler gauge glass problems are identified and solutions to these problems are
explained in accordance with organisational requirements.
Range
problems include but are not limited to – leakage, blockage,
breakage, false readings.
Outcome 2
Demonstrate knowledge of combustion air equipment in boilers.
Evidence requirements
2.1
Equipment used to provide combustion air to boilers is explained in terms of its
mechanical and operating principles.
Range
2.2
equipment includes but is not limited to – fans, dampers, registers,
air heaters.
Equipment used to control combustion is explained in terms of its operating
principles.
Range
combustion control equipment includes but is not limited to –
primary air, secondary air, forced draught, induced draught,
balanced draught.
Outcome 3
Demonstrate knowledge of steam generation fuel systems in boilers.
Evidence requirements
3.1
Fuels used for steam generation are described in terms of their handling
characteristics, use, and requirements for complete combustion.
Range
3.2
fuels include but are not limited to – gas, liquid, solid, site specific
fuels.
Fuel systems and fuel safety systems are explained in terms of function.
Range
fuel systems include but are not limited to – solid, liquid, gas.
Primary Industry Training Organisation
SSB Code 101558
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
3.3
21462 version 4
Page 3 of 4
Burner equipment and configuration are explained in terms of mechanical
operating principles.
Outcome 4
Demonstrate knowledge of feedwater equipment and layup in boilers.
Evidence requirements
4.1
Equipment is explained in terms of operating principles and effect on boiler
feedwater quality.
Range
4.2
equipment includes but is not limited to – primary treatment,
secondary treatment, boiler feedwater.
Components of a boiler feedwater system are identified and their purpose is
explained in terms of safety and maintenance of supply.
Range
components include but are not limited to – boiler feedwater
storage, tank deaerator, pump, feed check valve, isolating valves,
pipework.
4.3
Feedwater pump type is identified and explained in terms of start up
procedures.
4.4
Blowdown equipment is explained in terms of type and function.
Range
blowdown equipment includes but is not limited to – bottom
blowdown, automatic continuous, blowdown control.
4.5
Condensate monitoring and diversion equipment is explained in terms of
purpose, economic and operating problems and function.
4.6
Boiler feedwater tests are identified and explained in terms of the impact of out
of specification test results on the boiler.
Range
4.7
Impurities in feedwater are described in terms of their source and effects on the
boiler, feedwater system, condensate system, and steam quality.
Range
4.8
tests include but are not limited to – hardness, total dissolved
solids, pH, alkalinity, scale inhibitor reserve, oxygen scavenger
reserve,
impurities include but are not limited to – dissolved solids,
dissolved gases, suspended solids.
Wet and dry boiler layup is explained in terms of purpose and use.
Primary Industry Training Organisation
SSB Code 101558
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
Planned review date
21462 version 4
Page 4 of 4
31 December 2019
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