NZQA Expiring unit standard
21460 version 4
Page 1 of 5
Title
Meet requirements of person responsible for an unattended boiler
Level
3
Credits
8
Purpose
People credited with this unit standard are able to: explain
requirements for the monitoring and operation of an unattended
boiler; demonstrate knowledge of unattended boilers; and
operate and monitor an unattended boiler and its feedwater
system.
Classification
Energy and Chemical Plant > Operation of Energy and
Chemical Plant
Available grade
Achieved
Explanatory notes
1
Definitions
Boiler means a device comprising an arrangement of mainly pressure containment
parts such as drums, vessels, tubes, coils, and interconnecting parts used, or
intended to be used, to generate steam at temperatures above 100 degrees
centigrade by the use of a directly applied combustion process, or by the application
of heated gases. It includes all combustion equipment, fans, feed and circulating
pumps, pressure fittings, superheaters, reheaters, economisers, boiler piping,
supports, mountings, valves, gauges, controls, water level and combustion
management systems as are necessary to ensure the pressure integrity of the boiler,
or are necessary for its safe operation.
Code refers to the current Approved Code of Practice for the Design, Safe Operation,
Maintenance and Servicing of Boilers, Occupational Safety and Health Service, and
other relevant associated codes.
MOSHH refers to Approved Code of Practice for the Management of Substances
Hazardous to Health (MOSHH) in the Place of Work, Occupational Safety and Health
Service, 1997.
Organisational requirements refer to documented policies and to documented or
other directions provided to staff. These may include but are not limited to:
manufacturers’ procedures, plant procedures, suppliers’ instructions, site signage,
legislative requirements, codes of practice, company health and safety plans, on site
briefings, and supervisor’s instructions.
Plant refers to the plant or unit at which the person is employed.
This unit standard is
expiring
2
Performance of the elements of this unit standard must comply with the following
enactments: Health and Safety in Employment Act 1992 (HSE); Resource
Management Act 1991(RMA); and Hazardous Substances and New Organisms Act
1996.
New Zealand Industry Training Organisation
SSB Code 101541
 New Zealand Qualifications Authority 2016
NZQA Expiring unit standard
21460 version 4
Page 2 of 5
3
The Environmental Risk Management Authority (ERMA) is responsible for assessing
and approving hazardous substances and, where appropriate, setting controls on the
way the substance is used. Any questions relating to the provisions for hazardous
substances should be directed to ERMA New Zealand, telephone 04 916 2426; or
MITO, telephone 0800 88 2121.
4
Assessment against performance criterion 4.1 of this unit standard relates to the
operation of ion exchange softening equipment and does not extend to
demineralisation plant which is covered in Unit 21456, Operate systems for boiler
feedwater treatment.
5
This unit standard is for operators who are responsible for unattended boilers as
defined in the Code.
Outcomes and evidence requirements
Outcome 1
Explain requirements for the supervision and operation of an unattended boiler.
Evidence requirements
1
Industry requirements for quality systems are explained in accordance with the
Code.
1.2
Requirements under the HSE are explained and related to the Code.
1.3
Details of unattended boiler operation as defined in the Code are explained.
Range
1.4
1.5
high-integrity controls, mountings, boiler management system,
burner management system, supervision, monitoring.
This unit standard is
Requirements for maintenance are explained in terms of isolation, purge, and
confined space entry. expiring
Requirements under the RMA are explained.
Outcome 2
Demonstrate knowledge of unattended boilers.
Evidence requirements
2.1
Automated start up control system is described in terms of the boiler
management system.
2.2
The steps of the automatic start up control system are explained in terms of
their purpose.
2.3
Inputs to the boiler alarms and trips are identified and their purpose and settings
are explained in terms of the boiler management system.
New Zealand Industry Training Organisation
SSB Code 101541
 New Zealand Qualifications Authority 2016
NZQA Expiring unit standard
21460 version 4
Page 3 of 5
2.4
Emergency shut down devices are located and described in terms of the boiler
management system.
2.5
Information displayed on the boiler panel is identified and interpreted in terms of
the boiler and auxiliary equipment operating status.
2.6
Equipment installed on the boiler system is identified and explained in terms of
its purpose and operation.
Range
2.7
Impurities in feedwater are described in terms of their effects on the boiler,
feedwater system, condensate system, and steam quality.
Range
2.8
instrumentation, safety devices, fuel system, burners, fans,
chemical dosing system, feedwater system, blowdown system,
boiler mountings.
impurities – dissolved solids, dissolved gases, suspended solids.
Returned condensate systems are described in terms of benefits and hazards.
Outcome 3
Operate and monitor an unattended boiler.
Evidence requirements
3.1
Pre-start checks are carried out in accordance with organisational requirements.
3.2
The boiler is started up and shut down in accordance with the Code and
organisational requirements.
3.3
The boiler is brought online in accordance with the manufacturer's procedures.
3.4
Routine procedures are carried out and documented in accordance with the
Code and organisational requirements.
3.5
Boiler gauge glass blowdown procedure is carried out in accordance with
organisational requirements.
3.6
Boiler gauge glass problems are identified and evaluated, and solutions to
these problems are explained in accordance with organisational requirements.
This unit standard is
expiring
Range
plant monitoring, water testing, water treatment.
Range
3.7
leakage, blockage, breakage, false reading.
Routine testing of cutouts and alarms is demonstrated in accordance with
organisational requirements.
Range
water level control, low-level alarms and cutout, standby feed
pump.
New Zealand Industry Training Organisation
SSB Code 101541
 New Zealand Qualifications Authority 2016
NZQA Expiring unit standard
21460 version 4
Page 4 of 5
3.8
Checks are carried out after shut down in accordance with organisational
requirements.
3.9
Boiler is isolated for maintenance in accordance with organisational
requirements.
Outcome 4
Operate and monitor boiler feedwater system for an unattended boiler.
Evidence requirements
4.1
Site specific water treatment systems are identified and their purpose is
explained in terms of their effect on the quality of the feedwater.
Range
includes but is not limited to – water softener.
4.2
Site specific chemicals used in the boiler feedwater system are identified and
their purpose is explained in terms of their effect on the quality of the feedwater.
4.3
Feedwater chemicals are stored, handled, and dosed in accordance with
suppliers’ instructions and the MOSHH.
4.4
Boiler water samples are taken, analysed, and logged; deviations from required
operating parameters are identified; and correct action is taken in accordance
with organisational requirements.
4.5
Recommendations resulting from periodic testing by an approved laboratory are
implemented in accordance with organisational requirements.
4.6
The consequences of incorrect water treatment are explained in terms of their
effect on safe operation of boiler.
This
unitfoaming,
standard
is
scale, corrosion,
carry over.
Condensate return quality
is monitored, deviations and their effects are
expiring
identified, and corrective action is taken in accordance with organisational
Range
4.7
requirements.
This unit standard is expiring. Assessment against the standard must take place by
the last date for assessment set out below.
New Zealand Industry Training Organisation
SSB Code 101541
 New Zealand Qualifications Authority 2016
NZQA Expiring unit standard
21460 version 4
Page 5 of 5
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
31 December 2016
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.
This unit standard is
expiring
New Zealand Industry Training Organisation
SSB Code 101541
 New Zealand Qualifications Authority 2016