NZQA Expiring unit standard
22702 version 2
Page 1 of 5
Title
Install and commission commercial refrigeration and air conditioning
Level
3
Purpose
Credits
15
This unit standard is for people who work, or intend to work, in
the refrigeration and air conditioning sector of the engineering
industry, and is intended for use in the training of installers and
technicians of refrigeration and air conditioning equipment.
People credited with this unit standard are able to: demonstrate
knowledge of pre-installation activities for refrigeration and air
conditioning systems; install the components of refrigeration
and air conditioning systems; perform pre-start commissioning
procedures; perform start-up commissioning procedures; and
provide information to operators and complete required
documentation.
Classification
Mechanical Engineering > Refrigeration and Air Conditioning
Available grade
Achieved
Critical health and
safety prerequisites
Open.
Explanatory notes
This unit standard is
References
expiring
Building Act 2004;
Version 2 of this unit standard was republished to include Replacement Information
1
Electricity Act 1992;
Electricity Amendment Act 1997;
Hazardous Substances and New Organisms Act 1996;
Health and Safety in Employment Act 1992;
Ozone Layer Protection Act 1996;
Electricity Regulations 1997;
AS/NZS 1677:1998, Refrigerating systems – Refrigerant classification;
AS/NZS 3000:2000, Electrical installations;
Code of Practice for the reduction of emissions of fluorocarbon refrigerants in
refrigeration and air conditioning applications. Institute of Refrigeration, Heating and
Air Conditioning Engineers of New Zealand (IRHACE New Zealand), 2001. Available
from IRHACE, 28 E Lambie Drive, Manukau City, http://www.irhace.org.nz/.
Competenz
SSB Code 101571
 New Zealand Qualifications Authority 2016
NZQA Expiring unit standard
2
22702 version 2
Page 2 of 5
Definitions
Commercial refrigeration and air conditioning systems refers to items such as:
refrigeration equipment as found in retail food outlets, truck and shipping-container
refrigeration, horticultural cool room refrigeration, controlled atmosphere fruit stores;
and air conditioning equipment as found in commercial buildings.
Organisational procedures refer to documents that include: organisational rules,
codes, and practices; equipment operating instructions; production specifications;
documented quality management systems; and health and safety requirements.
Outcomes and evidence requirements
Outcome 1
Demonstrate knowledge of pre-installation activities for refrigeration and air conditioning
systems.
Evidence requirements
1.1
Installation drawings, schedule of materials, and instructions are described in
terms of checks that should be made against site conditions.
1.2
Two examples are given of modifications that may be required to suit site
conditions.
1.3
Procedures for assembling materials and verifying them against a schedule of
materials are described.
1.4
Procedures for verifying ancillary service connections and reporting any
discrepancies are described.
Range
1.5
may include but is not limited to – water, electricity, plumbing.
This unit standard is
expiring
Two examples are given of situations where permits and/or consents are
required for installations.
Outcome 2
Install the components of refrigeration and air conditioning systems.
Evidence requirements
2.1
Major components are positioned and secured in accordance with drawings,
designs, specifications, and instructions.
Range
2.2
refrigeration components include but are not limited to –
compressor, condenser, evaporator, metering device;
air conditioning components include but are not limited to –
compressor, outdoor fan coil, metering device, indoor fan coil.
Ancillary components and installation materials are installed in accordance with
drawings, designs, specifications, installation considerations, and instructions.
Competenz
SSB Code 101571
 New Zealand Qualifications Authority 2016
NZQA Expiring unit standard
Range
2.3
22702 version 2
Page 3 of 5
ancillary components may include but are not limited to – valves,
controls, filters, driers;
installation materials may include but are not limited to – supports
and bracketing to secure pipework, piping, tubing, capping,
thermal insulation;
installation considerations may include but are not limited to –
nitrogen purging, internal cleanliness.
The work of associated tradespeople is identified and reported in accordance
with organisational procedures.
Outcome 3
Perform pre-start commissioning procedures.
Evidence requirements
3.1
Safety devices are tested and calibrated and systems are verified as safe to be
exposed to operating pressures.
3.2
Controls are tested and set to meet specified performance and safety
requirements.
Range
3.3
controls equipment may include but is not limited to –
programmable logic control (PLC), electronic, electromechanical,
pneumatic.
Electrical systems are checked, and compliance with performance and safety
requirements is verified.
Range
checks include but are not limited to – earth continuity, insulation
resistance, polarity, voltage.
3.5
This unit standard is
expiring
Motor ratings are verified against fuse ratings and overload settings.
3.6
Motor and pump rotation directions are verified.
3.7
Fluid flows are tested and balanced as required.
3.8
Actions are taken as required to clear foreign solid matter from pipe-work and/or
associated components.
3.9
System and component integrity is confirmed by the use of appropriate leak
detection methods and equipment.
3.10
Compressor is checked and, if required, charged with appropriate lubricant.
3.11
System is evacuated to pull down to 500 microns or less to ensure that
moisture, oxygen, and non-condensables are removed.
3.4
Visual and tactile tests are performed to ensure the mechanical integrity of all
electrical terminations and connections.
Competenz
SSB Code 101571
 New Zealand Qualifications Authority 2016
NZQA Expiring unit standard
Range
22702 version 2
Page 4 of 5
evacuation tools include but are not limited to – Schraeder core
removal tool, vacuum analyser, vacuum pump, short large-bore
vacuum hose, solenoid valve, isolating valves.
3.12
Where triple evacuation is required, vacuums are broken with dry nitrogen.
3.13
Vacuums are broken with appropriate refrigerant after final evacuation.
Outcome 4
Perform start-up commissioning procedures.
Evidence requirements
4.1
System is checked and charged using appropriate method and refrigerant in
accordance with system specifications.
Range
method may include but is not limited to – suction super-heat set
and sub-cooling checked after system is running and stabilised,
compressor current measured and control settings verified for
operational performance, lubricant and/or refrigerant levels and
flows adjusted as necessary for required performance.
4.2
Lubricant and/or refrigerant identification labels are affixed to appropriate parts
of the system in accordance with legislative requirements.
4.3
System performance data is recorded as required by operational specifications
and instructions.
Range
temperatures, pressures, super-heat, sub-cooling, current draw,
fluid flows, humidity, noise, vibration.
This unit standard is
Provide information to operators and
complete required documentation.
expiring
Outcome 5
Evidence requirements
5.1
Operators are familiarised with manuals and operating instructions.
5.2
Operators are instructed to operate refrigeration and air conditioning systems
within design parameters, and in accordance with operational and worksite
procedures.
5.3
Documentation is produced outlining labour and materials used, and any details
required for a warranty in accordance with organisational procedures.
Competenz
SSB Code 101571
 New Zealand Qualifications Authority 2016
NZQA Expiring unit standard
Replacement information
22702 version 2
Page 5 of 5
This unit standard was replaced by unit standards
28959, 28963 and 29100.
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
20 June 2006
31 December 2019
Review
2
18 June 2015
31 December 2019
Republish
2
13 September 2015
31 December 2019
Consent and Moderation Requirements (CMR) reference
0013
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.
This unit standard is
expiring
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.
Competenz
SSB Code 101571
 New Zealand Qualifications Authority 2016