Service
CHW CRAC Servicing | Brisbane Sydney Melbourne
Chilled-water CRAC unit maintenance for large data centres and high-density computing environments.
CHW (Chilled Water) CRAC systems are the backbone of large Australian data centres. Cooling coils inside the CRAC unit are fed from a central chilled-water plant, providing high-capacity, energy-efficient cooling at scale. CHW units commonly handle 50–200kW per cabinet and pair naturally with high-density / AI-class loads.
CRAC Services maintains chilled-water CRAC equipment across all major brands — Vertiv Liebert PCW and PEX3 CW, Stulz CyberAir CW, Schneider Uniflair CW, Climaveneta CW, Daikin Applied CW. Service work covers the indoor coil-side scope: valves, actuators, fan systems, condensate, and control firmware.
Where a single contract covers both the chiller plant and the CHW CRAC, we coordinate service intervals to maximise efficiency and minimise outage windows.
Scope
Our service
includes
- 01Chilled-water valve and actuator checks
- 02Coil clean (chemical and brush)
- 03Fan motor and bearing inspection
- 04Variable-speed drive (VSD) diagnostic
- 05Condensate trap and pan service
- 06Humidifier descale and water-treatment check
- 07Electrical IR scan
- 08Setpoint and humidity-band validation (ASHRAE TC 9.9)
- 09Control firmware review and update
Recommended schedule
Preventative service intervals
01
Quarterly (professional)
- Valve and actuator test
- Fan motor electrical test
- Filter replacement
- Light coil clean
- Humidifier descale
02
Annually (comprehensive)
- Full chemical coil clean
- Comprehensive electrical IR scan
- VSD parameter audit
- Control firmware update
- Performance benchmark vs FAT data
Equipment
Equipment types
we service
FAQs
Frequently asked questions
CHW vs CDW vs DX – which is right for my site?
DX is best for small to mid sites (<500kW IT load) where per-unit air-cooled condensers are economical. CDW (condenser water) suits mid sites with centralised heat rejection. CHW is best for large data centres (>1MW IT) where central chiller plants drive part-load efficiency benefits. AI/high-density sites increasingly mix CHW with rear-door heat exchangers and direct-to-chip liquid cooling.
Can you do liquid cooling consultancy?
Yes — see our Liquid Cooling Consultancy service. CHW CRAC is the typical bridge to liquid cooling; we advise on rear-door heat exchangers, in-rack CDU integration, and direct-to-chip retrofits to existing CHW infrastructure.
What is the typical CHW set-point?
Common CHW supply temperatures sit between 7°C and 18°C, with 12–14°C being typical for mainstream data centres. Higher supply temperatures (15–18°C) reduce chiller plant energy but increase humidity control sensitivity. We can audit your set-points against ASHRAE TC 9.9 envelope and recommend an efficiency-first set-point regime.