Data Centre Cooling / CRAC Installation SWMS
SWMS template for data centre cooling / crac installation. Covers CRAC/CRAH, chilled water, raised floor.. 8-state AU coverage, CIH-reviewed editable DOCX, available as an instant download.
SWMS variants reference your state’s WHS legislation. Instant download after payment.
Data centre cooling installation involves the assembly, connection and commissioning of Computer Room Air Conditioning (CRAC) and Computer Room Air Handler (CRAH) units, chilled water reticulation, condensate drainage, refrigerant pipework and integration with raised access floor plenums. This work is typically performed in live, mission-critical environments where any loss of cooling, electrical disturbance or water ingress can cause cascading equipment failure, data loss and extended business disruption. Workers face simultaneous exposure to refrigerants, glycol, manual handling of heavy plant, working at height onto raised floor stringers, energised electrical infrastructure and confined spaces beneath floor voids.
Under the model Work Health and Safety Act 2011 and WHS Regulation 2011 (and the equivalent legislation in each Australian jurisdiction, including WHS Regulation 2017 NSW and OHS Regulations 2017 Victoria), a Person Conducting a Business or Undertaking (PCBU) must identify hazards, assess risks and implement controls in accordance with the hierarchy of controls under regulation 36. Where the work meets the definition of High Risk Construction Work (HRCW) under regulation 291, a Safe Work Method Statement (SWMS) must be prepared before work commences.
CRAC installation routinely triggers multiple HRCW categories — including work in or near energised electrical installations, work on or adjacent to pressurised gas (refrigerant) and chilled water services, and work in confined or restricted spaces beneath raised floors. This SWMS template has been reviewed by a Certified Industrial Hygienist and structured to satisfy regulations 299–303, including the requirement that the SWMS is available for inspection, kept until the work is complete, and reviewed if controls are revised.
Hazards identified
6 hazards covered, sorted by priority.
Asphyxiation in confined plant rooms, cryogenic burns, cardiac sensitisation, and decomposition products (HF, COF2, phosgene) from heated refrigerant exposure
Electrocution, severe burns, blast injury and cascade tripping of UPS/critical loads
Crush injuries, musculoskeletal disorders, raised floor pedestal collapse and damage to live IT racks
Confined space exposure, lacerations on sharp containment edges, entrapment and contact with energised power whips
Slip hazards on hot/cold aisle containment flooring, water ingress into live electrical equipment, environmental contamination and chemical exposure
False alarm activation triggering pre-action sprinkler discharge, fire spread through cable bundles, and burns to the brazer
Control measures
Hierarchy-of-controls order: elimination → substitution → isolation → engineering → administrative → PPE.
- 1Issue a written Permit to Work and Method of Procedure (MOP) approved by the data centre operator before any tools enter the white space; isolate VESDA zones and place adjacent smoke detectors into maintenance/bypass mode in accordance with AS 1670.1.
- 2De-energise CRAC feeders at the upstream PDU/RPP, apply personal danger tags and locks under an LOTO procedure compliant with AS/NZS 4836, and verify dead with a tested two-pole voltage tester before terminations.
- 3Only ARCtick-licensed technicians (Ozone Protection and Synthetic Greenhouse Gas Management Act 1989) to handle refrigerant; recover refrigerant to AS/NZS 1677.2 standards using calibrated recovery units before any pipework cuts.
- 4Use mechanical lifting aids — pallet jacks, Genie lifts, air skates and floor-tile lifters rated for the panel weight — and remove a minimum of two adjacent floor tiles with edge guards installed before lowering plant.
- 5Conduct a confined space risk assessment under AS 2865 for any raised floor void work exceeding 30 minutes or where atmosphere may be impaired; provide continuous gas monitoring (O2, LEL, CO) where brazing occurs in the void.
- 6Implement hot work permit per AS 1674.1 with a dedicated fire watch, charged extinguisher, fire blanket protecting cabling, and a 30-minute post-work watch period; use induction brazing or press-fit fittings in lieu of open flame wherever practicable.
- 7Pressure test chilled water pipework with compressed air or nitrogen to 1.5× working pressure outside the data hall before final tie-in; install drip trays and water leak detection cables (e.g. TraceTek) under all wet pipework above raised floor.
- 8Mandatory PPE: arc-rated coveralls (minimum 8 cal/cm² for switching tasks per AS/NZS 4836), Class 0 insulated gloves, safety glasses, hearing protection in CRAC plenum (>85 dB(A)), and cryogenic gloves when handling refrigerant cylinders.
- 9Maintain segregation of hot and cold aisles during works using temporary containment curtains; coordinate with the facility BMS operator to manually balance remaining CRAC capacity and avoid thermal runaway in the affected zone.
- 10Conduct a daily pre-start toolbox talk reviewing the MOP step number for that shift, the rollback procedure, and emergency contact for the on-shift data centre Critical Facilities Manager.
Applicable Codes of Practice
Mandates preparation of a SWMS before commencing HRCW including work near energised installations, confined spaces and pressurised gas/fluid lines.
Outlines the minimum content and review requirements for SWMS under regulations 299–303.
Applies to isolation, testing for de-energisation and live work justification on CRAC three-phase supplies and control circuits.
Sets installation, charge limit and ventilation requirements for DX CRAC systems in occupied plant areas.
Governs refrigerant handling, recovery, leak testing and signage during CRAC installation and commissioning.
Applies to entry into raised floor voids and CRAC plenums where atmosphere, access or egress is restricted.
Required hot work permit framework for brazing refrigerant lines inside an operating data hall.
Governs final electrical connections, earthing and protection of CRAC unit supplies.
High-Risk Construction Work triggered
CRAC units are fed from live PDUs/RPPs and terminations occur adjacent to energised busways and power whips serving IT loads that cannot be de-energised.
Raised access floor voids, CRAC return plenums and chilled water pump rooms can constitute confined spaces under AS 2865 due to restricted access and potential atmospheric hazards from refrigerant or brazing fumes.
Refrigerant lines (R410A typically operating at 2.5–3.0 MPa) and pressurised chilled water/glycol mains are cut, brazed and pressure-tested as part of the installation.
Because this work meets the definition of HRCW under WHS Regulation r291, a SWMS must be prepared before work starts, must be complied with during the work, and must be made available to the principal contractor and regulator on request. Failure to prepare or comply with a SWMS exposes the PCBU to penalties up to $30,000 (individual) or $150,000 (body corporate) under r300, with higher Category 1 and 2 offence penalties under sections 31–33 of the WHS Act where reckless conduct results in serious harm.
Who this is for
- →HVAC and mechanical services contractors installing CRAC/CRAH units in colocation, hyperscale and enterprise data centres
- →Refrigeration technicians (ARCtick licensed) commissioning DX cooling and chilled water systems
- →Mechanical project managers and site supervisors preparing tier-rated MOPs for data centre operators
- →Electrical contractors performing CRAC final connections and BMS integration
- →Principal contractors coordinating fit-out of white space and plant rooms in mission-critical facilities
- →WHS managers and safety advisors supporting data centre construction and upgrade programs
What you receive
- ✓Fully editable Microsoft Word (DOCX) SWMS template, CIH-reviewed and ready to brand with your company logo and ABN
- ✓State-specific legislation schedule covering NSW, VIC, QLD, WA, SA, TAS, ACT and NT WHS/OHS Regulations and Codes of Practice
- ✓Comprehensive hazard register pre-populated with data centre cooling-specific hazards, risk scores and hierarchy-of-control treatments
- ✓Worker sign-on register with competency, ARCtick licence number and induction acknowledgement fields
- ✓Pre-start daily checklist and Method of Procedure (MOP) integration template
- ✓Refrigerant handling and recovery log compliant with AS/NZS 1677.2
- ✓Hot work permit and VESDA isolation checklist
- ✓Delivery as an editable DOCX as an instant download confirmation
Worked example
A mechanical contractor is engaged to swap out four end-of-life Liebert DX CRAC units for new chilled water CRAH units in a Tier III colocation facility in Sydney. The data hall remains live with tenant IT load at approximately 180 kW per row. The site supervisor downloads this SWMS, populates the company details and project-specific MOP step numbers, and identifies that HRCW categories 3, 9 and 14 apply. The team's ARCtick-licensed technician recovers R410A from the existing units to a recovery cylinder, the electrical subcontractor isolates each CRAC feeder at the RPP under LOTO, and the floor-tile lifting crew uses a Genie lift to remove the old chassis through a temporary containment curtain. During shift two, a worker identifies that the chilled water tie-in point sits directly above a live network rack. The supervisor pauses work, references the SWMS control measures, escalates to the Critical Facilities Manager, and installs a temporary leak-detection cable and drip tray before authorising the tie-in to proceed. The amended control is recorded on the SWMS review page, re-signed by all workers at the next pre-start, and the original SWMS is retained on site until practical completion in accordance with WHS Regulation r302.
Related legislation
- Work Health and Safety Act 2011 (Cth model) — sections 19, 20 and 26A
- Work Health and Safety Regulation 2011 — regulations 36, 291, 299–303
- Work Health and Safety Regulation 2017 (NSW)
- Occupational Health and Safety Regulations 2017 (Victoria)
- Work Health and Safety Regulation 2011 (Queensland)
- Ozone Protection and Synthetic Greenhouse Gas Management Act 1989 (Cth)
- Electricity (Consumer Safety) Act 2004 and equivalent state electrical safety legislation
- Building Code of Australia / National Construction Code Volume One — Section J and Section E
Frequently asked questions
Does this SWMS cover both DX CRAC and chilled water CRAH installations?
Yes. The template includes hazards, controls and HRCW analysis for direct expansion (DX) systems with refrigerant pipework, chilled water CRAH units with glycol/water reticulation, raised floor integration and BMS connection. You can delete sections that do not apply to your specific scope.
Is this SWMS valid in all Australian states and territories?
Yes. The document includes a state-specific legislation schedule referencing the harmonised WHS Regulation in NSW, QLD, SA, TAS, ACT and NT, the Victorian OHS Regulations 2017, and the WA Work Health and Safety (General) Regulations 2022. The control measures align with Safe Work Australia model Codes of Practice that are adopted across all jurisdictions.
Who is qualified to sign off this SWMS as the responsible person?
The SWMS should be authorised by a competent person nominated by the PCBU — typically the mechanical project manager, site supervisor or HSE manager — who has reviewed the controls with the workers performing the task. All workers must sign the worker register confirming they have been consulted and understand the SWMS, in line with WHS Regulation r300.
How often should the SWMS be reviewed once work has started?
Under WHS Regulation r301, the SWMS must be reviewed and revised whenever the control measures are revised, when a new hazard is identified, after an incident, or when requested by a HSR. For mission-critical data centre work we recommend review at the start of each shift and after any MOP deviation.
Does the SWMS address VESDA and pre-action sprinkler isolation during brazing?
Yes. The hot work control set includes coordination with the facility fire panel operator to isolate the affected VESDA zone, place adjacent point detectors into maintenance mode, post a fire watch, and restore detection at the end of each shift — all referenced to AS 1670.1 and AS 1674.1.
What is the turnaround time after I purchase?
The editable DOCX is delivered to your nominated email as an instant download confirmation. You receive the master template plus the state legislation schedule, hazard register and worker sign-on register as separate editable files.