WEG CFW701 HVAC-R Drive
High Efficiency Fan, Pump, and Compressor Control with Built-In Intelligence
The CFW701 builds on the proven CFW700 architecture with firmware tailored for HVAC-R plants. It delivers energy savings, redundancy, and fault management capabilities demanded by hospitals, universities, data centers, and high-rise complexes. Gross Automation pairs the CFW701 with engineered bypass panels, PLC500 sequencing, and remote monitoring to keep your mechanical systems online 24/7.
Power Platform
1 to 60 HP (0.75 to 45 kW)
1.5 to 700 HP (1.1 to 560 kW)
7.5 to 900 HP (5.5 to 670 kW) with high short-circuit ratings
HVAC-R Firmware
- Dedicated macros for cooling towers, condenser fans, and AHU supply/return coordination
- Run-permissive logic, smoke purge, and fireman override sequences
- Anti-legionella purge, pump cleaning, and dry pump detection routines
- Extended PID with feed-forward, auto-tuning, and sensor loss recovery
- Energy reporting, trend buffering, and maintenance reminders via HMI
Connected Services
BACnet MS/TP & IP, Modbus TCP, LonWorks, and optional OPC UA via CFW900 gateway
Embedded logging, trend export, and connectivity to cloud dashboards or PLC500 historians
Integrated STO, motor thermistor inputs, and redundant I/O for critical loads
Facility Use Cases
- Hospitals and life safety systems
- Laboratories and clean rooms
- District energy and central plants
- Commercial high-rise HVAC retrofits
- Mission-critical data center cooling loops
Engineered to Protect Critical Environments
Redundancy & Bypass
Factory-tested bypass packages with HOA switches, status indication, and manual override maintain airflow during drive maintenance.
Advanced Diagnostics
Event logging, trend graphs, and alarm timestamping help facility engineers troubleshoot without additional tools.
Remote Commissioning
Bluetooth, USB, and network access support offsite programming while secure passwords and lockouts protect setpoints.
Integrated Safety
Safe Torque Off, input redundancy, and emergency overrides provide confidence for smoke control and life safety sequences.
Mission-Critical Project Support
Central Plant Upgrades
Multi-drive lineups with PLC500 sequencing, redundant pumps, and soft starter integration for chillers and boilers.
Data Center Cooling
Coordinated supply/return fans, CRAH units, and bypass cabinets with hot-aisle containment controls.
Healthcare Compliance
Joint Commission documentation, smoke purge validation, and remote monitoring with secure audit logs.
Energy Retrofits
Measurement & verification support to document savings and qualify for incentive programs.
Integration with PLC500 & Building Automation
We deliver tested control strategies that blend CFW701 drives with PLC500 racks, redundant networks, and supervisory systems. Our team produces point-to-point wiring diagrams, alarm matrices, and FAT procedures so maintenance crews inherit a documented system.
- Redundant PLC500 or SCADA interfaces with failover logic and health monitoring
- Custom TPW HMI screens for plant rooms showing drive status, speed, and alarms
- Modular design supporting chilled water resets, differential pressure staging, and condenser control
- Remote access packages with secure VPN, dashboards, and alarm notifications
Project Documentation
Design Submittals
Equipment schedules, wiring diagrams, and sequence of operations packaged for consultant approval.
Startup Checklists
Parameter verification, sensor calibration, and alarm simulation documented for turnover.
Lifecycle Services
Preventative maintenance, firmware updates, and emergency response plans tailored to each facility.
CFW701 Resources
Installation & Operation Manual
Detailed instructions covering wiring, protective functions, and HVAC-specific parameters.
Download ManualCommissioning Worksheet
Request our mechanical room worksheet capturing motor data, sensor assignments, and alarm routing.
Request WorksheetMonitoring Package
Ask about remote dashboards, trending, and alarm notifications aligned with your facility IT policies.
Discuss Monitoring