NZQA registered unit standard
26337 version 1
Page 1 of 4
Title
Demonstrate advanced knowledge of heating, ventilating, and air
conditioning systems
Level
4
Purpose
Credits
12
This unit standard is intended primarily for use in the training of
personnel in the heating, ventilating, and air conditioning
(HVAC) industry and covers the advanced principles of HVAC
systems.
People credited with this unit standard are able to demonstrate
knowledge of the operation of HVAC systems, and HVAC
control and building management systems.
Classification
Mechanical Engineering > Heating, Ventilating, and Air
Conditioning
Available grade
Achieved
Entry information
Recommended skills
and knowledge
Recommended: Unit 26336, Demonstrate knowledge of the
components used in heating, ventilating, and air conditioning
systems.
Explanatory notes
1
Definitions
Air conditioning and ventilation systems include large central air conditioning
systems, ducted constant-flow rate and variable-flow rate air conditioning systems,
packaged and split air conditioning, heat pumps, supply and extract ventilation
systems, fume ventilation, industrial ventilation systems.
Advanced knowledge refers to the knowledge expected by industry of a qualified
HVAC technician. This includes the ability to demonstrate in-depth knowledge of
operation of HVAC,HVAC control, and building management systems.
Building Management systems refer to computer-based systems used to
automatically control and monitor HVAC systems and other building features such as
lighting, security, and access.
Chilled water systems include plain water, brine, and glycol systems.
Hot water heating systems include low, medium, and high temperature hot water
heating systems.
Industrial liquids systems include dry goods systems such as grains, industrial fluids
systems such as inks, systems for slurries such as whey milk products, and
pelletized bed systems.
Competenz
SSB Code 101571
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
26337 version 1
Page 2 of 4
Potable hot and cold water systems include commercial, industrial, and institutional
systems larger than domestic systems.
Steam and condensate systems include systems that use gas, coal, oil, or electricity
as fuel sources for the heating system components.
Systems for gases include medical gases, LPG, CNG, oxygen, acetylene,
compressed air, and natural gas.
2
This unit standard is one of three designed to cover knowledge of HVAC systems,
the others being Unit 26335, Demonstrate introductory knowledge of heating,
ventilating, and air conditioning; and Unit 26336, Demonstrate knowledge of
components used in heating, ventilating, and air conditioning systems. It is
recommended that competency in unit standards 26335 and 26336 be achieved
before assessment against this unit standard
Outcomes and evidence requirements
Outcome 1
Demonstrate knowledge of the operation of HVAC systems.
Range
hot water heating systems, chilled water systems, potable hot and cold water
systems, steam and condensate systems, air conditioning and ventilation
systems, gas systems, industrial liquids systems.
Evidence of one of each is required.
Evidence requirements
1.1
The operation of the system is described with reference to inputs and outputs.
1.2
The major components of the system are identified and their functions and
interconnections are explained.
Outcome 2
Demonstrate knowledge of HVAC control and building management systems.
Range
assessment is limited to the HVAC control functions of building management
systems.
Evidence requirements
2.1
Different types of HVAC control systems are identified and their features
compared.
Range
Competenz
SSB Code 101571
a self-acting system, a stand-alone electrical system, a standalone electronic system, a building management system, a
pneumatic control system.
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
2.2
The basic principles of control methods and responses used in HVAC systems
are explained with reference to typical applications.
Range
2.3
26337 version 1
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methods – open loop, closed loop on-off, modulating;
responses – two position, floating, proportional (P), proportionalintegral (PI), proportional-integral-derivative (PID).
The operation of a modern HVAC control and building management system is
explained with the aid of given systems drawings and with reference to
processes and components.
Range
processes may include – control logic; sensing of changes in
temperature, pressure, velocity, current and relative humidity;
development of a suitable response in accordance with predefined settings or program; instruction of controlled devices to
respond; storage and dissemination of data.
Components may include – self-acting valves, sensors, flow
switches, damper actuators, valve actuators, input/output
modules, power supply modules, controllers, display modules,
networks, relays, contactors, timers, variable speed drives, current
transformers, safety devices, energy usage meters.
Status and review information
Registration date
16 July 2010
Date version published
16 July 2010
Planned review date
31 December 2015
Accreditation and Moderation Action Plan (AMAP) reference
0013
This AMAP 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, or
an inter-institutional body with delegated authority for quality assurance, 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.
Consent requirements and an outline of the moderation system that applies to this
standard are outlined in the Accreditation and Moderation Action Plan (AMAP). The
AMAP 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.
Competenz
SSB Code 101571
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
26337 version 1
Page 4 of 4
Comments on this unit standard
Please contact Competenz at qualifications@competenz.org.nz if you wish to suggest
changes to the content of this unit standard.
Competenz
SSB Code 101571
 New Zealand Qualifications Authority 2016