Service
CDW CRAC Servicing | Brisbane Sydney Melbourne
Condenser water CRAC maintenance for data centres, mechanical switch rooms and critical infrastructure.
CDW (Condenser Water) CRAC systems use a closed water loop connected to an external cooling tower or dry cooler to reject heat from the precision-cooling unit. They are common in mid-to-large data centres where centralised heat rejection is more efficient than per-unit DX condensers.
CRAC Services maintains CDW CRAC systems across Australia - including the loop water side. Our scope covers indoor unit servicing, condenser-water control valve and actuator checks, water-quality testing, and coordination with cooling tower / dry cooler maintenance schedules to AS/NZS 3666 (Legionella control).
Service work is delivered by ARC-licensed refrigeration technicians where the indoor unit contains a DX or chiller stage, and by qualified mechanical service technicians for the water-loop scope.
Scope
Our service
includes
- 01Condenser water valve and actuator checks
- 02Cooling coil clean and airflow balance
- 03Water-loop pressure and flow validation
- 04Pump performance check (delivered head, current draw)
- 05Water-quality test (conductivity, pH, biological)
- 06Strainer clean and isolation valve service
- 07Humidifier descale and water treatment
- 08Control system diagnostics and alarm review
- 09AS/NZS 3666 cooling tower compliance review
Recommended schedule
Preventative service intervals
01
Monthly / Bi-Monthly (in-house)
- Filter inspection
- Strainer check
- Alarm review
- Visual condensate check
02
Quarterly (professional)
- Valve and actuator test
- Pump performance test
- Humidifier descale
- Light coil clean
- Loop pressure validation
03
Annually (comprehensive)
- Full water-loop chemical clean (where required)
- Comprehensive electrical IR scan
- Coil clean both sides
- AS/NZS 3666 compliance audit
- Control firmware update
Equipment
Equipment types
we service
FAQs
Frequently asked questions
What is a CDW CRAC system?
A CDW CRAC system uses condenser water from a cooling tower or dry cooler loop to remove heat from precision cooling equipment. CDW is generally more efficient than air-cooled DX at scale, but adds the complexity of a water-loop service regime including AS/NZS 3666 compliance.
Where are CDW CRAC systems used?
CDW CRAC systems are common in mid-to-large data centres, telecommunications facilities, mechanical switch rooms, and electrical plant rooms - wherever centralised heat rejection is more economic than per-unit DX condensers. They typically appear in builds 500kW+ critical IT load.
Do you also maintain the cooling tower?
We can service the cooling tower under a coordinated programme, or work with your existing tower contractor - many sites have a separate mechanical-services contractor for the tower side. Either way, we'll provide the AS/NZS 3666 compliance review on the water side that ties the indoor and outdoor scopes together.
How is water quality managed?
Closed-loop CDW systems run on inhibited glycol or treated water; open-loop towers run on chemically dosed make-up water. We test conductivity, pH, biological count, and free chemical residual quarterly, and provide a remediation plan if any parameter is out of spec. Legionella testing follows AS/NZS 3666.3 protocols.
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