Heat Pump Hot Water System Install SWMS
Safe work method statement for the installation of heat pump hot water systems including refrigerant handling under ARCtick licence, electrical coordination, and condensate drainage.
SWMS variants reference your state’s WHS legislation. Instant download after payment.
Heat pump hot water system installation is a multi-disciplinary task that combines licensed plumbing work, electrical coordination, refrigerant handling under an ARCtick Refrigerant Handling Licence, and the safe positioning of heavy condensing units. Unlike a standard storage tank changeover, heat pump units contain a sealed refrigerant circuit (typically R134a, R290 or R744/CO2), draw significant electrical load, and discharge condensate that must be plumbed to an approved point of discharge. Each of these elements introduces hazards that must be identified, assessed and controlled before work begins.
Under section 19 of the Work Health and Safety Act 2011 (Cth model) and the WHS Regulation 2025, persons conducting a business or undertaking (PCBUs) must eliminate or minimise risks to health and safety so far as is reasonably practicable. Regulation 39 specifically requires that the chosen control measures be documented and communicated to workers, which is the function of a Safe Work Method Statement (SWMS).
While heat pump hot water installation does not, in itself, automatically trigger a High Risk Construction Work (HRCW) category under Regulation 291, a SWMS remains the recognised tool for demonstrating consultation, hazard identification, and compliance with the Plumbing Code of Australia, AS/NZS 3500.4, AS/NZS 3000:2018 and the Ozone Protection and Synthetic Greenhouse Gas Management Regulations 1995. This SWMS provides a defensible written record that the installer has assessed the work and implemented control measures aligned with current legislation.
Hazards identified
12 hazards covered, sorted by priority.
Musculoskeletal injury, crush injury to hands or feet, hernia
Cold burns, asphyxiation in confined areas, environmental harm under Ozone Protection Regulations
Electric shock, electrocution, arc flash burns
Falls from ladders or roofs causing serious injury or fatality
First to third degree burns from water exceeding 50°C at outlets
Burns, fire ignition of nearby combustibles, cylinder explosion
Flash fire, explosion, severe burns
Sprains, fractures, head injury
Noise-induced hearing loss exceeding LAeq,8h 85 dB(A)
Silicosis, chronic obstructive pulmonary disease, lung cancer
Legionnaires' disease (severe pneumonia)
Public liability incident, mould growth, structural damage to building
Control measures
Hierarchy-of-controls order: elimination → substitution → isolation → engineering → administrative → PPE.
- 1Conduct a pre-start risk assessment and toolbox talk on the day of installation, with all workers signing the SWMS before commencing work, in accordance with WHS Regulation 2025 reg 39(2).
- 2Use mechanical lifting aids (trolleys, two-person lift straps, or stair-climber) for any heat pump unit exceeding 25 kg as per the Hazardous Manual Tasks Code of Practice 2018.
- 3Only licensed refrigerant handlers holding a current ARCtick RHL perform any work on the refrigerant circuit; pre-charged line sets to be coupled per manufacturer torque specifications and leak-tested with electronic detector before commissioning.
- 4Isolate electrical supply at the switchboard, apply lock-out tag-out (LOTO), and verify dead with a test instrument complying with AS/NZS 4836 before any electrical termination; final connection to dedicated circuit performed by licensed electrician under AS/NZS 3000:2018.
- 5Where work is performed at height above 2 metres, use industrial ladders rated to AS/NZS 1892, mobile scaffolds, or approved roof anchor and harness systems; complete a fall risk assessment for any roof-mounted condenser.
- 6Set tempering valve to deliver water at no more than 50°C to sanitary fixtures in accordance with AS/NZS 3500.4 clause 1.10, and verify temperature at the outlet during commissioning.
- 7Maintain a fire watch with 9 kg dry chemical extinguisher and heat-shield blanket within 3 metres when brazing; remove or shield combustibles, and continue fire watch for 30 minutes post-brazing.
- 8For R290 (propane) systems, ensure ventilation, prohibit ignition sources within 3 metres during charging or leak repair, and use intrinsically safe leak detectors per AS/NZS 60079.
- 9Use H-class M-class HEPA-filtered dust extraction or wet-cut methods for all core drilling, with P2 respirators where engineering controls cannot eliminate respirable crystalline silica below the WES of 0.05 mg/m³.
- 10Wear Class 5 hearing protection when operating core drills or impact tools, complying with AS/NZS 1270.
- 11Flush existing hot water pipework at maximum temperature (>60°C for 5 minutes) following changeover to mitigate Legionella risk in stagnant water sections.
- 12Plumb condensate drain to an approved tundish, gully trap or stormwater connection in accordance with AS/NZS 3500.2 — never discharge to a path, driveway or unsealed surface.
- 13Mandatory PPE: safety boots (AS 2210.3), cut-resistant gloves for sheet metal handling, nitrile gloves for refrigerant work, safety glasses (AS/NZS 1337.1), and hi-vis where working in shared traffic areas.
Applicable Codes of Practice
Establishes the duty to identify hazards, assess risks and implement controls — the legal basis for preparing this SWMS.
Mandatory technical standard governing installation, tempering, and discharge requirements for heated water services including heat pump units.
Governs the electrical connection of the heat pump to a dedicated final sub-circuit, RCD protection, and earthing requirements.
Requires anyone handling refrigerant to hold a valid ARCtick Refrigerant Handling Licence; venting refrigerant attracts penalties up to $26,640 per offence.
Applies where condensers or evacuated tubes are mounted at height; mandates fall prevention hierarchy.
Governs assessment and control of manual handling for heavy heat pump cylinders and condensers.
Provides the hierarchy of control framework applied throughout this SWMS.
Performance requirements for heated water installations in residential and commercial buildings.
Who this is for
- →Licensed plumbers and plumbing contractors installing residential or commercial heat pump hot water systems
- →ARCtick-licensed refrigeration mechanics commissioning split-system heat pump units
- →Hot water specialist businesses tendering for government rebate programs (e.g. Victorian Energy Upgrades, NSW Energy Savings Scheme) which require documented WHS systems
- →Renewable energy installers expanding from solar PV into heat pump hot water under Small-scale Technology Certificate (STC) programs
- →Apprentices and trade assistants who require a written safe system of work to be inducted into
- →Builders and principal contractors requiring subcontractor SWMS for new build or major renovation projects
What you receive
- ✓Fully editable Microsoft Word (DOCX) SWMS template, branded-ready and pre-populated with heat pump installation specific content
- ✓State-specific legislation schedule covering WHS Act and Regulation references for NSW, VIC, QLD, SA, WA, TAS, ACT and NT
- ✓Comprehensive hazard register with 12 identified hazards, risk ratings and hierarchy-of-control measures
- ✓Worker sign-on register (consultation record) compliant with WHS Regulation 2025 reg 46 consultation duties
- ✓Plant and equipment register template covering brazing equipment, recovery units, manifold gauges and electrical test instruments
- ✓Pre-start daily checklist for site verification of isolations, atmospheric conditions and PPE
- ✓Emergency response procedure including refrigerant exposure, electric shock, and burn first aid
- ✓Free lifetime updates when referenced legislation or standards change
Worked example
Daniel is a licensed plumber and ARCtick RHL holder retrofitting a 270L Sanden heat pump in place of an ageing electric storage tank at a Brisbane home, working under a Victorian Energy Upgrades-style rebate program. Before arriving, he downloads this SWMS, populates the site address, principal contractor and worker details, and emails the homeowner the consultation summary. On site, he and his apprentice review the SWMS together and both sign on. Daniel identifies that the new condenser will sit on a concrete pad requiring core drilling for the line set penetration, and applies the silica dust controls (wet-cut, P2 respirator) listed in the controls section. During installation, the licensed electrician arrives to terminate the dedicated 15A circuit. Daniel implements LOTO at the switchboard, the electrician verifies dead, and Daniel countersigns the isolation log embedded in the SWMS. After brazing the line set joints, Daniel maintains a 30-minute fire watch as specified, pressure tests with dry nitrogen to 4200 kPa, evacuates and commissions the unit. He sets the tempering valve to 48°C, plumbs condensate to the existing stormwater tundish, and files the completed SWMS in his job pack — providing a defensible record should WorkSafe Queensland audit the job.
Related legislation
- Work Health and Safety Act 2011 (Cth model)
- Work Health and Safety Regulation 2025
- Ozone Protection and Synthetic Greenhouse Gas Management Act 1989
- Plumbing and Drainage Act (state-specific)
- Electrical Safety Act (state-specific)
- Building Code of Australia / National Construction Code Volume Three (PCA)
- Environment Protection Act (state-specific) — for refrigerant disposal
- Workers Compensation legislation (state-specific)
Frequently asked questions
Do I need a SWMS for heat pump hot water installation if it isn't classified as High Risk Construction Work?
While heat pump installation does not automatically trigger an HRCW category under WHS Regulation 2025 reg 291, you still have a duty under section 19 of the WHS Act and reg 34–38 to identify hazards and document controls. Most principal contractors, rebate scheme administrators (VEU, ESS, STC) and commercial clients require a SWMS as a condition of engagement. It is the recognised industry document for demonstrating compliance.
Does this SWMS cover the refrigerant handling component, or do I need a separate document?
This SWMS covers the integrated installation including refrigerant connection of pre-charged line sets, leak testing, evacuation and commissioning. It assumes the operator holds a valid ARCtick Refrigerant Handling Licence. If your scope includes refrigerant recovery from a decommissioned unit or charging from bulk cylinders, you should supplement with your refrigerant handler's procedures.
Is this SWMS valid in all Australian states and territories?
Yes. The document references the model WHS Act and WHS Regulation 2025 framework adopted by NSW, QLD, SA, TAS, ACT, NT and the Commonwealth, and includes a state schedule mapping equivalents for Victoria (OHS Act 2004 / OHS Regulations 2017) and Western Australia (WHS Act 2020 / WHS Regulations 2022).
How often should this SWMS be reviewed?
Under WHS Regulation 2025 reg 38, a SWMS must be reviewed when the work changes, after an incident or near-miss, when new information becomes available, or when a worker requests review. As a baseline, we recommend an annual review and re-issue to all workers, with a fresh sign-on at every new site.
Can I edit the SWMS to add my company logo and project-specific details?
Yes. The SWMS is supplied as a fully editable Microsoft Word (DOCX) document. You can insert your company branding, ABN, project address, principal contractor details, and add or modify hazards specific to the site. We recommend retaining the core hazard register and control measures, and only adding to them rather than removing entries.
Does the SWMS include the electrical work, or do I need a separate one for the electrician?
This SWMS covers the plumbing scope including the coordination interface with the licensed electrician (isolation, LOTO, verification). The electrician should provide their own SWMS for the electrical works under AS/NZS 3000:2018, particularly if any work involves live testing or switchboard modifications. The two SWMS should be reviewed together at the pre-start meeting.