NZQA Expiring unit standard
17606 version 6
Page 1 of 4
Title
Operate and maintain refrigerated air conditioning equipment on
energy and chemical plant
Level
4
Credits
10
Purpose
People credited with this unit standard are able to: demonstrate
knowledge of refrigeration equipment used in air conditioning
systems on energy and chemical plant; operate and maintain a
refrigerated air conditioning system; and identify, explain, and
respond to deviations in refrigerated air conditioning
equipment, at an energy and chemical plant.
Classification
Energy and Chemical Plant > Operation of Energy and
Chemical Plant
Available grade
Achieved
Explanatory notes
1
Definitions
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.
2
Performance of the elements of this unit standard must comply with the following
enactments: Health and Safety in Employment Act 1992; Resource Management Act
1991; and Hazardous Substances and New Organisms Act 1996.
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
EXITO, telephone 03 964 4710.
This unit standard is
expiring
New Zealand Industry Training Organisation
SSB Code 101541
 New Zealand Qualifications Authority 2016
NZQA Expiring unit standard
4
17606 version 6
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This unit standard is for occupations such as plant operators and maintenance
personnel whose role can include all or some of the following: steam generation,
water treatment, hydrocarbon processing, electrical generation, refrigeration, and air
conditioning in industries including petrochemical, power generation, dairy
processing, meat processing, timber processing and other manufacturing industries.
Outcomes and evidence requirements
Outcome 1
Demonstrate knowledge of refrigeration equipment used in air conditioning systems for
energy and chemical plant.
Evidence requirements
1.1
The operation of a refrigeration system in energy and chemical plant is
explained in terms of the basic functioning principles.
Range
1.2
Components of the refrigeration system in energy and chemical plant are
explained in terms of their purpose and operation.
Range
1.3
the refrigeration cycle, refrigerants, latent heat, evaporation,
condensation, superheating, subcooling, pressure temperature
relationship.
compressor, evaporator, condenser, liquid receiver, dryer, oil
separator, expansion valves, thermostats, safety devices.
Types of refrigerated air conditioning systems in energy and chemical plant are
identified in terms of their mode of operation.
rooftop,unit
split system,standard
water chiller.
This
is
Health and safety requirements for refrigerants in energy and chemical plant are
explained in terms of safety
and environmental precautions.
expiring
Range
1.4
Range
material safety data sheets, safety equipment, effect of
fluorocarbons on the environment.
New Zealand Industry Training Organisation
SSB Code 101541
 New Zealand Qualifications Authority 2016
NZQA Expiring unit standard
17606 version 6
Page 3 of 4
Outcome 2
Operate and maintain a refrigerated air conditioning system at an energy and chemical
plant.
Evidence requirements
2.1
System components are operated and monitored in an energy and chemical
plant to maximise efficiency in accordance with organisational requirements.
Range
2.2
Current status of the refrigerated air conditioning equipment in an energy and
chemical plant is determined in accordance with organisational requirements.
Range
2.3
operating, shut down, isolated.
System components are prepared for maintenance in an energy and chemical
plant in accordance with organisational requirements.
Range
2.4
monitoring may include – liquid levels, flows, vibration, telltale
noises;
maximisation may include – indoor air quality, extend life of
equipment, remedy faults.
preparation includes but is not limited to – shut down, purge.
Routine preventive maintenance is carried out in an energy and chemical plant
in accordance with organisational requirements.
Range
refrigerant, cooling water, oil strainers, air circulation system filters,
evaporator unit, safety controls, oil pressure, high and low
refrigerant system pressure, low temperature, shut off valves;
instruments – pressure gauges, temperature gauges.
This unit standard is
Identify, explain, and respond to deviations
in refrigerated air conditioning equipment at an
expiring
energy and chemical plant.
Outcome 3
Evidence requirements
3.1
Deviations from normal operating parameters are identified to determine the
impact on plant operations in accordance with organisational requirements.
Range
3.2
deviations include but are not limited to – operating pressures,
temperature, cycle times;
operations include but are not limited to – compressor, condenser,
receiver, evaporator.
Refrigeration equipment protection systems are identified and explained in
terms of function.
Range
trip systems, overpressure relief, compressor surge control.
New Zealand Industry Training Organisation
SSB Code 101541
 New Zealand Qualifications Authority 2016
NZQA Expiring unit standard
3.3
17606 version 6
Page 4 of 4
Equipment malfunctions are identified and acted on in accordance with
organisational requirements.
Range
refrigerant charging, condenser repair and replacement, dryer
repair and replacement, evaporator repair and replacement, oil
addition.
This unit standard is expiring. Assessment against the standard must take place by
the last date for assessment set out below.
Status information and last date for assessment for superseded versions
Process
Version Date
Last Date for Assessment
Registration
1
25 November 2000
31 December 2014
Revision
2
24 July 2002
31 December 2014
Review
3
27 June 2005
31 December 2014
Rollover and
Revision
4
25 July 2006
Review
5
22 May 2009
31 December 2016
Review
6
24 October 2014
31 December 2016
31 December 2014
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.
This unit standard is
Industry Training Organisations must be granted consent to assess against standards by
NZQA before they can register credits
from assessment against unit standards.
expiring
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.
New Zealand Industry Training Organisation
SSB Code 101541
 New Zealand Qualifications Authority 2016