DEPARTMENT OF DEFENCE
DEFENCE ESTATE QUALITY MANAGEMENT SYSTEM
MECHANICAL ENGINEERING
STANDARD FUNCTIONAL DESIGN BRIEF INCLUSIONS FOR
MECHANICAL ENGINEERING (HVAC) SYSTEMS
Aug 2014
DOCUMENT STATUS
Version No. / Issue Date / Amendment Details / Amended by1 / - / Draft Version / CG
2 / Nov 2012 / Draft Version issue for comment / TML
3 / Aug 2014 / Review and update / TML
CONTENTS
1.0 INTRODUCTION 5
1.1 Aim 5
1.2 Sponsor 5
2.0 POLICY OBJECTIVES, PRINCIPLES AND APPLICATION 5
2.1 Policy Objectives 5
2.2 Policy Principles 5
2.3 Application 5
3.0 SPECIFIC REQUIREMENTS 6
3.1 FDB Content for Mechanical Engineering Services 6
3.2 Design Options 7
3.3 Design Service Provider Responsibilities 7
3.3.1 General 7
3.3.2 Design Reports 8
3.3.3 Drawings 9
3.3.4 Testing and Commissioning 11
3.3.5 As-Built Information 11
3.3.6 Certification, Verification and Validation 11
3.3.6.1 Certification Report for Defence 12
3.4 Specific Mechanical Equipment Requirements 12
3.4.1 Standardisation, Supportability and Maintainability 12
3.4.2 Proprietary Equipment 13
4.0 CODE, STANDARD AND POLICY REQUIREMENTS 13
4.1 Identification 13
4.2 Codes Standards and Legislation 13
4.3 Industry Technical and Quality Standards 14
4.4 NOHSC Codes and Standards 14
4.5 Other Codes, Standards, Legislation and Guidance 14
4.6 DEQMS Requirements 15
4.6.1 Defence Estate Quality Management System 15
4.6.2 Manual of Fire Protection Engineering 15
4.6.3 Mechanical Engineering Policy 15
4.6.4 Miscellaneous Policy 16
4.6.5 Other Defence Requirements 16
5.0 BCA SECTION J APPLICATION 16
6.0 WORK HEALTH AND SAFETY 17
7.0 GENERAL GUIDANCE 17
7.1 Performance Objectives 17
7.2 Specific Defence Requirements 17
7.3 Appropriate Project Team 17
7.4 Design Constraints or Possible Relaxation of Defence Requirements 18
7.5 Quality Management, Peer Review and Quality Plans 18
7.6 Mechanical Engineering Certification 18
7.7 Fire Mode Operation 20
7.8 Plant Failure Mode Operation 20
7.9 Ecologically Sustainable Development and Energy Management 20
7.10 Reliability, Redundancy, Spare Capacity, Safety Factors and Planning For Future Expansion 20
7.11 Project and Equipment Life 21
7.12 Passive Defence and Security Measures for HVAC Systems 21
7.13 Project Specific Documents 22
7.14 Work by Others Clauses 22
7.15 Investigation under the Scope of Work 22
7.16 Existing Services 23
7.17 Existing Equipment Decommissioning and Removal 23
7.18 Services Access 23
7.19 Maintenance 23
7.20 Indoor Design Conditions 24
7.21 Outdoor Design Conditions 25
7.22 Allowance for Climate Change 25
7.23 Room Data Sheets 25
7.24 Outdoor Air 25
7.25 Ventilation of Air Conditioned Rooms 26
7.26 Ventilation for Heat Removal 26
7.27 Natural Ventilation Design for Space Temperature Control 26
7.28 Air Conditioned Areas of Transient or Variable Occupancy 27
7.29 Mixed-Mode Systems 27
7.30 Special Purpose Ventilation Systems 27
7.31 Outdoor Air Filtration 28
7.32 Filter Types and Efficiencies 28
7.33 Air Diffusion 28
7.34 Flexible Ductwork 28
7.35 Fire and Smoke Damper Installations 29
7.36 Access to Coil Faces 29
7.37 Noise and Vibration 29
7.38 Communications Room Equipment 29
7.39 Microbial Control in Air Handling and Water Systems 30
7.40 Building Management Systems 30
7.41 Technical Equipment Schedules 31
7.42 Air Cooled Condenser Installations 31
7.43 Safety Showers and Eyewash Facilities 31
7.44 Fixed Plant and Equipment Requiring Special Licences 31
1.0 INTRODUCTION
Functional Design Briefs (FDBs) and other contract documents define the specific design, functional relationships and performance requirements for Defence buildings which are necessary to meet Defence requirements and to comply with Government and Defence policies, Standards and legislation. (The term building in this policy document shall be read as including Defence buildings, facilities, installations, central plant, equipment complexes and the like. The term Defence throughout this document shall be read as meaning Defence generally and Defence Users).
1.1 Aim
The aim of this document is to facilitate Defence’s objectives by providing guidance to those formulating the mechanical engineering component of Defence FDBs.
1.2 Sponsor
This document is sponsored by Directorate of Estate Engineering Policy (DEEP) on behalf of the Technical Authority Assistant Secretary Environment and Engineering (ASEE). Enquiries may be directed to:
Director Estate Engineering Policy
Brindabella Park (BP26-2-B049),
Canberra ACT 2600
Tel: (02) 6266 8178 Fax: (02) 6266 8211 Email:
2.0 POLICY OBJECTIVES, PRINCIPLES AND APPLICATION
2.1 Policy Objectives
Defence policy objectives are to:
· Ensure that FDBs for mechanical engineering services for Defence buildings are formulated by a consistent, rigorous, clear and fully documented methodology which considers all applicable Defence and Statutory requirements, is fit for purpose, demonstrates due diligence having been exercised, and provides an auditable project record.
· Ensure Work Health and Safety (WHS) matters including duty of care, due diligence, risk assessment and safety-in-design analysis have been considered and incorporated into the brief formulation process and thereby promote safe and healthy work environments and a safety culture reflecting Defence values, beliefs and practices.
2.2 Policy Principles
The principles described in this document shall be used in implementing the policy objectives.
2.3 Application
The requirements of this policy document apply to mechanical engineering systems serving Defence buildings as appropriate to the project life, location, building type and use. The terms Heating, Ventilating and Air Conditioning (HVAC) systems, mechanical engineering and mechanical services are variously used throughout the document, meaning mechanical engineering services as applicable to Defence buildings.
The document provides commentary and guidance for those formulating briefing requirements and inclusions which should be considered for mechanical engineering services for existing, new and refurbished Defence buildings. As such the commentary and guidance provided must be considered, interpreted and applied to the specific requirements of a project when formulating an FDB. The document is not intended to be copied word for word into an FDB complete with that commentary and guidance.
This policy document is not intended to cover all mechanical engineering FDB considerations. The content generally covers HVAC systems and services. Further guidance on FDBs is provided under the Defence Estate Quality Management System (DEQMS).
3.0 SPECIFIC REQUIREMENTS
3.1 FDB Content for Mechanical Engineering Services
A project specific FDB shall be formulated which clearly describes Defence’s technical and non-technical requirements. The FDB shall provide sufficient detail to allow Designers to fully determine and clearly understand all Defence requirements, and to thoroughly and critically review them. A primary purpose of the FDB is to ensure that important parameters, requirements and design criteria have not been overlooked and they reflect actual needs within the project scope. The FDB also provides a contract document against which the Designer compliance and the completed and operating building compliance can be measured and validated.
Designers shall proactively coordinate with Defence Support and Reform Group (DSRG) and Defence Users throughout the various project stages to ensure the briefed requirements are being met.
FDBs shall define the mechanical engineering services scope of work, establish design intent and address all general and specific requirements which include, but are not limited to:
· Defence requirements.
· Compliance with Australian Standards, Codes of Practice, Statutory legislation and regulations.
· Compliance with Defence standards, policy, procedures and requirements.
· Mechanical engineering services objectives, selection criteria and constraints.
· General and specific design considerations.
· Requirements for reliability, redundancy, standby plant, spare capacity and future-proofing.
· Defence’s HVAC system selection methodology and reporting requirements.
· WOL cost analysis.
· Cross-discipline coordination.
· Valid compliance certification.
· Effective Quality Management including Quality Assurance (QA), peer review and associated requirements. These include demonstrating the required duty of care to exercise due diligence in the design and delivery process and for the work to be carried out by qualified, competent, knowledgeable and experienced persons practicing within their area of professional expertise.
· Existing services condition, capacity, constraints, re-use, residual spare capacity, and remaining effective life.
· Underground services.
· Safe decommissioning and removal of existing redundant services, with particular care for potentially contaminated systems.
· Associated Work by Others and Builder’s Work. (The final version of the FDB should identify all works where the Designer intends abrogating design (and thereby design responsibility) to others including Installation Contractors. There are contractual and WHS obligations and liabilities associated with design work abrogated in this manner and undertaken by others than the Designer engaged for that purpose).
· Testing and commissioning requirements including fully integrated and cross-discipline commissioning.
· Items that require further investigation.
· Requirements for design reports.
· Hazardous area, dangerous goods and confined space requirements.
· Health and safety requirements including WHS legislation compliance.
· Risk assessment and safety-in-design analysis.
· Environmental impact assessment and contamination management.
· Any other functional, performance, technical or non-technical requirements to complete the brief.
Where an FDB is not fully developed, the Designer may be required (subject to Defence contract requirements) to develop the FDB into a comprehensive and complete final FDB for submission to the Defence Project Officer for Defence approval, prior to commencing design.
3.2 Design Options
After rigorously comparing and assessing all available design options, the Designer shall select the best fit-for-purpose design solutions that meet the requirements of the FDB and those specific to the Defence building. (Defence’s HVAC system selection process is described under DEQMS policy document Requirements for Heating, Ventilating and Air-Conditioning Systems for Defence Buildings – Part 2 System Selection Methodology and Report).
3.3 Design Service Provider Responsibilities
3.3.1 General
The term Designer as used throughout this document shall be read as meaning the Design Service Provider which primarily relates to Consultants undertaking design services but also includes others undertaking design related activities where specifically allowed under the Defence contract.
Typically, Consultants are engaged through Defence contract arrangements as Designers to undertake the complete design and documentation service. Non-compliance occurs where Designers fail to complete the contracted service. Instead, a partial design service is provided with Designers abrogating their design responsibility by passing design and documentation activities to Installation Contractors or others via the tender documents. This situation typically occurs either by default when a design is incomplete at tender or deliberately where tender documents specify design completion activities to be undertaken by Installation Contractors or others.
This situation is problematic for Defence for various reasons. Contracts for provision of a complete design service are typically between Defence and the design Consultants contracted for that purpose, based on their professional competence in the particular area of practice. Designers that fail to complete the contracted design service and abrogate design responsibility to Installation Contractors and others expose Defence and themselves to unacceptable risk. This occurs when Installation Contractors or others undertake design and documentation activities outside their areas of competence and their contracted scope of installation work. There is also an issue concerning design and documentation liability when Installation Contractors or others undertake this work for which they do not carry Professional Indemnity Insurance.
Responsibility
The Designer is responsible for complying with the FDB. Subject to the particular contract requirements, the responsibility typically encompasses:
· Designing the installation and specifying the technical performance of equipment in accordance with the briefed requirements.
· Verification that the completed design conforms to the FDB and the contract.
· Validating that the constructed and commissioned installation complies with the completed design and specification and thereby with the briefed requirements. (Validation in this context is as defined in AS/NZS 3905.12:1999: ‘Confirmation by examination and provision of objective evidence that the particular requirements for a specific intended use are fulfilled’).
Principles and Guidance
Designers shall follow the principles and guidance provided by DEQMS policy documents: Requirements for Heating, Ventilating and Air-Conditioning Systems for Defence Buildings – Parts 1 and 2, together with HVAC industry technical and quality standards and systems described in clause 4.0 of this document.
Mechanical Engineering Services Objectives
Mechanical engineering services are provided to suit various requirements including for human comfort, for occupied and unoccupied spaces, to satisfy product or process requirements, and to meet Statutory and WHS obligations. The primary objectives of mechanical engineering services for Defence buildings are therefore to provide and maintain in an efficient, cost effective and sustainable manner:
· the required indoor environmental conditions, air quality and air movement in occupied and unoccupied spaces; and
· the required environmental, process or product conditions.
Designer shall ensure that in complying with the primary objectives, mechanical services are capable of maintaining the desired environmental, process or product conditions within an acceptable tolerance, under specified conditions and occupant activities, and in a fully compliant, safe and healthy manner. Objectives include but are not limited to:
· Mechanical services designed and installed in full compliance with WHS legislation and all applicable Standards and Codes, legislation and Defence policy.
· Reliability.
· Maintainability and supportability.
· Achieving specific performance requirements associated with the location, site and building.
· Mechanical services components which are properly designed, correctly selected, sized and applied, correctly installed and fully tested and commissioned.
3.3.2 Design Reports
Designer shall provide design reports in accordance with DEQMS Design Management/Progression and with the mechanical engineering policy documents listed under DEQMS Engineering and Maintenance Policy. In particular, specific design report requirements are covered in DEQMS policy document Requirements for Heating, Ventilating and Air-Conditioning Systems for Defence Buildings - Part 1 General Guidance, Clause 9 HVAC Reports.
Design reports are required in accordance with the particular Defence contract. Typically, design reports are submitted to Defence at the following stages:
· 30% Concept Design (30CDR).
· 50% Schematic Design (50SDR).
· 90% Detailed Design (90DDR).
· As further required by the contract, Project Director or Directorate Estate Engineering Policy (DEEP).
After reviewing and assessing design reports, Defence will advise of the need for further submission of design reports. (The review and assessment process is described under DEQMS PRAP section. Defence review and assessment in this context are limited as to scope and extent as described by associated PRAP qualifiers. Irrespective of any Defence review or assessment, responsibility for design compliance rests with those contracted to carry out the design service and is not abrogated or diminished by Defence’s PRAP process).