Operation & Maintenance Manuals (O&M Manuals) are a comprehensive, technically authored documents, which provides building owners and operators with details of each item of mechanical and electrical equipment / plant enabling efficient operation, and effective maintenance for plant longevity, decommissioning, and final demolition of a building.

When and Why the O&M Manual is Required?

In general, Practical Completion of commercial projects and new residential developments can not be achieved without the provision of comprehensive O&M Manuals. O&M Manuals are not specifically mandated in standards in legislation but have been adopted by the construction industry as a mandatory document which demonstrates compliance with the relevant regional requirements:

• United Kingdom & ROI: The Construction (Design and Management) Regulations 2015 (CDM 2015) require the Client to ensure the building can be safely maintained, cleaned, and managed during its operational life. Whilst not directly referenced within this, an O&M Manual is the definitive documentation containing the technical specifications, procedures, and schedules that prove the Client is meeting these broad statutory safety duties and other related Health & Safety legislation.  
• Australia: Requirements for O&M Manuals are driven by the National Construction Code (NCC) and various Australian Standards (AS), rather than a single prescriptive Act. The NCC, and its associated state/territory regulations, mandate the provision and maintenance of Essential Safety Measures (ESMs), such as fire systems, emergency lighting and mechanical plant and equipment. The O&M Manual provides documentary evidence that enables the building owner to legally comply with the required maintenance standards for these ESMs, often referencing specific maintenance criteria set out in Australian Standards and industry guides, such as AIRAH DA19, which are specified in contractual documentation. 
• New Zealand: as per the Building Act 2004, for any building containing ‘Specified Systems’ (SS), which include critical M&E features like fire alarms, lifts, and mechanical ventilation, the owner must have a council-issued Compliance Schedule (CS). This CS dictates the specific maintenance procedures and frequencies required. The O&M Manual is therefore the necessary technical reference document that contains the underlying data, system instructions, and maintenance schedules used by the owner and the Independent Qualified Person (IQP) to verify and certify compliance annually via the Building Warrant of Fitness (BWoF).
• Canada: provincial Occupational Health and Safety (OHS) Acts mandate that building owners (PCBUs/Employers) must provide and maintain safe structures and safe systems of work. The O&M Manual serves as the essential documentary proof that fulfills this legal duty by providing future workers with required information on residual hazards, safe operating procedures, maintenance logs, and structural limitations. The National Fire Code (NFC) and relevant CSA Standards contain technical requirements for ongoing maintenance which make O&M Manual submission a non-negotiable pre-condition for achieving Substantial Performance (Practical Completion) on site.

Worldwide, contractual requirements drive and ensure that O&M manuals are provided for all commercial and multi residential / mixed use projects, such as: 

• UK: Standard forms like JCT and NEC Contracts / PFI  PPP agreements explicitly list O&M Manuals, Health & Safety Files, and commissioning reports as required documents for Practical Completion (PC). 

Other examples worldwide are:-

• Australia: NATSPEC and AS 4000 and AS 2124 contain clauses that require the handover of all operational and maintenance manuals (including those required by the NCC) a condition for PC.
• New Zealand: NZS 3910 and NZIA contract documentation stipulate the format, content structure, and the deadline for submission of O&M manuals for Practical Completion and  address the requirements for the CS.
• Canada:  Canadian Construction Documents Committee (CCDC) contracts include explicit clauses that define the contractor’s obligation to submit comprehensive maintenance and operational data which is required for issuance of the Certificate of Substantial Performance (CSP). 

Content

O&M Manuals should be clear, concise and accurate.  Each document must be project specific, based on the installed equipment and by trained and qualified technical writer who have full understanding of the systems they are documenting. Key sections include:

• Preliminaries: 

• • Introduction: an introduction to the document
  • Contact Details: provision of contact details for the project team, local emergency services and council, emergency contact numbers for critical systems (e.g., lift breakdown, BMS support), comprehensive registry of all manufacturer and supplier contacts for warranty and technical support 
  • Reference Standard and Acronyms: point of reference for standards, codes and regulations, along with a reference acronym list.
• Description of the Installation: General scope of works for the installation, accompanied by detailed system descriptions for each item of equipment including location, interaction with other systems and purpose.
• Operating Instructions: an outline of the equipment operating parameters
• Maintenance: suggested routine maintenance procedures based on manufacturer recommendations and industry standards such as SFG20 and DA 19. The preventative maintenance log sheets enable the facilities team to track and record scheduled servicing to maintain warranty validity and regulatory compliance.  Specific emphasises on safety protocols, including the need for Risk Assessments, Method Statements, and potentially a Permit to Work system, before undertaking tasks. It also lists key safety considerations such as electrical isolation, handling hazardous materials (COSHH), and checking for asbestos-containing materials.
• Fault Finding: Practical, step-by-step instructions and troubleshooting flowcharts designed to help maintenance staff quickly identify and rectify common system faults and failures without immediately calling out specialist engineers.
• Schedule Of Equipment / Asset Register: Comprehensive schedules detailing every piece of installed equipment (including capacities, serial numbers, model numbers, location, and power requirements)
• Manufacturer’s Literature: Collation of technical documentation, specifications, and literature provided by the numerous manufacturers of the installed mechanical and electrical systems, and directs users to contact manufacturers directly for spare part details.
• Certificates / Test / Commissioning Reports: sections for the insertion of compliance certificates / statuary certificates and forms / commissioning reports and test sheets associated with the equipment / systems installed.
• As Installed / Fitted Drawings: sections for the insertion of  final drawings which detail the installation of the plant / equipment / systems

Format

O&M Manuals in various formats including hard copy folders, digital format and via online portals, all in-accordance with the specific project contractual requirements.

Outsourcing Technical Documentation

For contractors and project managers, technical authoring of O&M manuals often presents a significant challenge due to time pressure, technical expertise and the need to focus on on-site duties. Outsourcing to specialist technical writing experts becomes invaluable in these situations to ensure that documentation is accurate, concise, delivered on time and cost effective.

Why Choose Dewick & Associates?

Dewick & Associates’ team are fully knowledgeable in the stringent requirements of local regulations and contractual requirements associated with construction documentation.  By choosing to outsource to us, contractors achieve three key advantages:

• Technical Knowledge: our in-house Chartered Engineers (CIBSE CEng / CPEng. Mech MIEAust) and Technical Writing Team technically author all of our O&M Manuals.  This professional expertise is crucial for accurately translating complex installation drawings / schematic / technical data into clear, concise and accurate documentation.
• Time & Cost Efficiency: freeing up expensive on-site management time.
• Guaranteed Compliance: delivering the complete, verified document necessary for timely Practical Completion and successful handover.
• Complete handover package: proactive document management and early-stage compilation throughout the project lifecycle, preventing last-minute information scrambles and reducing the risk of delays to Practical Completion.

We are able to transform complex, fragmented site data into an accessible, auditable, and high-quality documentation for your project handover.

Coupled with providing fully comprehensive construction documentation, including Building Handover Manuals, O&M Manuals, Health & Safety Files and Regulation 38 Files, CIBSE TM31 Logbooks complete the mandatory documentation provision at handover for your projects. Outsource this to the experts so you can concentrate on the pressing onsite works to complete the project to the high standard required.

Author: Louise Gardner, General Manager, Dewick & Associates

Have a question or a project you would like to discuss? Contact us.