NZQA Expiring unit standard
3225 version 6
Page 1 of 4
Title
Commission hot water heating systems and diagnose hot water
heating systems faults
Level
5
Credits
20
Purpose
This unit standard is for people who work, or intend to work, in
the heating, ventilation and air conditioning sector of the
engineering industry. People credited with this unit standard
are able to: document the procedure required for
commissioning a hot water heating system; measure and
record the operational effectiveness and efficiency of the
system; adjust the system for optimal operations and confirm
its compliance after adjustment; collect information and reports
on a heating system and inspect and observe its operation;
diagnose, locate and repair system faults; and complete
inspection and repair reports.
Classification
Mechanical Engineering > Heating, Ventilating, and Air
Conditioning
Available grade
Achieved
Entry information
Critical health and
safety prerequisites
Prerequisite: Unit 3247, Pre-commission and inspect hot water
heating systems or demonstrate equivalent knowledge and
skills.
Recommended skills
and knowledge
It is recommended that people undertaking this unit standard
have knowledge of electrical circuitry and control systems and
mechanical services plant, as evidenced by qualification as an
electrical services technician, or demonstrate equivalent
knowledge and skills.
Explanatory notes
1
Knowledge of hot water heating systems and the principles of their design and
diagnosis is recommended.
2
System documents include documented operating and maintenance procedures or
instructions for the system including manufacturer’s specifications and companyprepared operating and maintenance manuals.
Competenz
SSB Code 101571
 New Zealand Qualifications Authority 2016
NZQA Expiring unit standard
3
3225 version 6
Page 2 of 4
System commissioning and operation must meet recognised codes of practice and
documented safety procedures and safety plans (where these exceed code) for
personal and work site safety, and obligations required under current legislation.
Outcomes and evidence requirements
Outcome 1
Prepare for commissioning the hot water heating system.
Evidence requirements
1.1
Pre-commissioning checks are completed and comply with procedures laid
down in system documents.
1.2
Commissioning method and programme are produced and recording sheets are
prepared in accordance with company policies and procedures.
1.3
Design information relevant to system being commissioned is obtained.
1.4
Flow rates are confirmed for the system being commissioned.
1.5
Commissioning instruments are procured and calibrated in accordance with
system documents.
Outcome 2
Commission the hot water heating system.
Evidence requirements
2.1
The system is test-run in accordance with system documents and
commissioning method and programme.
2.2
Readings are taken and recorded from the system test-run.
2.3
Adjustment procedure planned for the system meets the performance levels
and ranges specified in system documents.
2.4
System is adjusted and readings are re-checked for conformity to performance
levels and ranges specified in system documents.
Outcome 3
Complete hot water heating system commissioning documentation.
Evidence requirements
3.1
System compliance with commissioning requirements is recorded in accordance
with system documents.
Competenz
SSB Code 101571
 New Zealand Qualifications Authority 2016
NZQA Expiring unit standard
3225 version 6
Page 3 of 4
3.2
Commissioning report is completed and actioned in accordance with system
documents and company policies and procedures.
3.3
Maintenance manuals and operating instructions are checked and adjusted to
meet commissioning report data and specifications.
Outcome 4
Diagnose hot water heating system faults.
Evidence requirements
4.1
Information on faults is collected from customer or operator and from
maintenance reports in accordance with company procedures.
4.2
Faults are identified and diagnosed through observation of the system’s gauges,
meters, instruments and other signs and deduction of the cause, in accordance
with company procedures.
4.3
Faults are identified and diagnosed through tests as specified in system
documents, of system componentry, in accordance with company procedures.
Outcome 5
Repair faults in hot water heating system.
Evidence requirements
5.1
Faulty system components, controls and equipment are repaired or replaced
according to system documents’ specifications.
5.2
Faulty system components, controls and equipment are repaired or replaced
according to company policies and procedures or warranties on replacement
and repair.
5.3
If required, specialist services are obtained for the repair and replacement of
faulty system components, controls and equipment.
5.4
System is test-run and adjusted for conformity to performance levels and ranges
specified in system documents.
5.5
Documentation of faults diagnosed and repair action is completed in
accordance with system documents and company policies and procedures.
Replacement information
Competenz
SSB Code 101571
This unit standard, unit standard 3224, unit standard
3226, unit standard 3227, unit standard 3228, unit
standard 3229, unit standard 3230, unit standard 3231,
and unit standard 3232 have been replaced by unit
standard 26330.
 New Zealand Qualifications Authority 2016
NZQA Expiring unit standard
3225 version 6
Page 4 of 4
This unit standard is expiring. Assessment against the standard must take place
before the expiry date set out below.
Status and review information
Expiring date
16 July 2010
Date version published
16 July 2010
Expiry date
31 December 2016
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