Product Engineering Page: Vendor-Specific Content
Yaskawa HV600 for Data Center HVAC Applications
The HV600 is an HVAC-dedicated variable frequency drive platform for fan and pump applications. This page describes where it fits in data center cooling systems, mapped against the vendor-neutral requirements developed in the VFD design guide.
Where the HV600 fits in a data center
Data center cooling plants are dominated by variable-torque fan and pump loads operating continuously at part load. The HV600 is designed specifically for this duty: variable-torque ratings, embedded BACnet and Modbus, integrated harmonic and EMC mitigation, and HVAC-oriented control functions such as PID control, multi-pump staging and configurable failure behaviors.
Chilled water pumps
Primary and secondary chilled water pumps are classic variable-torque loads where cube-law savings are largest. The HV600's internal PID controller can hold differential pressure or ΔT setpoints locally, keeping the pump loop controllable even if the supervisory BMS is offline. Multi-pump alternation and staging logic support duty/standby groups without external relay logic.
Cooling tower fans
Tower fans require wide speed ranges, skip frequencies to avoid structural resonance bands, and reliable operation on condenser water temperature control. De-icing (reverse rotation) support and configurable minimum speeds are relevant for winter operation. IP55 variants suit plant rooms adjacent to outdoor equipment.
CRAH / AHU fans
Computer room air handlers run continuously at part load, which is exactly where variable-speed control earns its keep. Supply air or underfloor pressure control can run in the drive's PID loop or in the CRAH controller, with the drive following a network or analog speed reference. Automatic restart with configurable delay supports staggered restart of fan groups after power events.
Dry cooler applications
Dry cooler and adiabatic cooler fan walls commonly use groups of smaller motors. One drive per fan preserves failure domains and allows finer capacity staging; the HV600 covers the small-power end of the range in compact IP20 frames for panel building, or IP55 for standalone mounting near the equipment.
Integration, resilience and commissioning
BMS integration
The HV600 provides the monitoring points a data center BMS needs, run status, speed, current, power, energy, drive temperature and fault codes, without gateway hardware. Control can be full network speed reference, network-enabled with local PID, or hardwired with network monitoring only, which lets the controls designer choose where each control loop lives.
BACnet
BACnet MS/TP is embedded as standard, with BACnet/IP available. The implementation conforms to the B-ASC device profile, and a PICS document is available from the manufacturer for integration review. A configurable communication-loss watchdog defines drive behavior when the network stops updating: maintain last speed, transition to a preset fallback frequency, or stop: selected to match the facility's cooling continuity strategy.
Harmonic considerations
An integrated DC link choke reduces input current distortion compared with an unchoked 6-pulse rectifier. As with any drive, facility-level IEEE 519 compliance must be evaluated at the point of common coupling: for large drive populations or generator-heavy operating modes, the harmonic study may still call for supplementary mitigation. Manufacturer harmonic data supports that study.
Emergency operation
A dedicated emergency override input forces the drive to a predefined speed regardless of network commands: used for smoke control modes or maximum-cooling emergency scenarios. An external 24 V control supply input keeps the control board and communications alive when mains power is removed, so the BMS retains visibility during electrical switching operations.
Redundancy
In N+1 pump and fan groups, each motor should have its own dedicated drive so a drive failure removes only one failure domain. The HV600's compact frame sizes and integrated options (choke, EMC filter) keep the per-motor cost and panel space of that architecture manageable.
Commissioning
Parameter copy via keypad, a guided start-up sequence and electronic parameter backup shorten commissioning of large drive populations. Fallback behaviors (communication loss, sensor failure, restart after power loss) are all parameter-configurable and therefore testable, which matters, because those behaviors must be witnessed during integrated systems testing.
N + 1
Each critical redundant motor should preferably have its own dedicated VFD to maintain independent failure domains.
Capability summary
Mapped against the engineering requirements developed in the design guide:
| Engineering Requirement | HV600 |
|---|---|
| HVAC dedicated platform | Yes |
| Fan and pump applications | Yes |
| BACnet MS/TP | Yes |
| Modbus RTU | Yes |
| Integrated DC choke | Yes |
| Integrated EMC filter | Yes |
| IP20 | Yes |
| IP55 | Yes |
| Hand-Off-Auto keypad | Yes |
| PID functionality | Yes |
| Emergency override | Yes |
| External 24 V control power | Yes |
Recommended specification
The requirements this platform addresses are captured in vendor-neutral form in the Data Center HVAC VFD Specification. Specifying the requirements rather than the product keeps procurement competitive while ensuring any compliant drive meets the facility’s integration and resilience needs.
Disclosure: The author works in the industrial automation industry and has professional experience with Yaskawa drive technology. Product-specific information should always be verified using the latest manufacturer documentation. See the editorial policy for how vendor-specific content is handled on DataCenterGuidelines.com.