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.
Brands we service
CRAC brands we install and maintain
Sectors we cool
Industries that rely on precision cooling
Pairing CRAC cooling with critical power? Our sister Trinity brand UPS Services handles UPS systems, batteries and switchboards for the same data centres and server rooms we cool.
Visit UPS ServicesLocations