Zero‑Rewiring FCU Retrofit: Benefits & Process

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Zero-rewiring LoRaWAN FCU thermostats like SAS920XFCT enable fast upgrades without new data cables, reducing costs, downtime, and tenant disruption. This guide explains the benefits and step-by-step retrofit process.

Why Traditional HVAC Retrofits Are Costly

● Pulling new data wiring requires labor and material

● Drilling or cutting walls disrupts tenants

● Projects take longer than planned

● Coordination with multiple floors or units is complex

How Zero‑Rewiring FCU Retrofit Works

Zero-rewiring FCU controllers use:

● Existing AC power lines (85–260V)

● Long-range LoRaWAN for communication

● Local control logic to operate independently of the network

Benefits of Zero-Rewiring Retrofits

● Lower Installation Costs – no cabling, reduced labor

● Minimal Tenant Disruption – no drilling or construction noise

● Faster Deployment – install multiple units in hours instead of days

● Scalable for Large Projects – hundreds of nodes can be deployed seamlessly

Step‑by‑Step Retrofit Process

● Evaluate existing FCU systems (2-pipe or 4-pipe)

● Choose suitable LoRaWAN thermostat (e.g., SAS920XFCT)

● Replace existing controllers with zero-rewiring devices

● Configure network settings (OTAA/ABP)

● Program 7-day schedules and energy limits

● Test and verify runtime metering and billing integration

Applications & Use Cases

● Multi-tenant office buildings

● Commercial complexes and malls

● Hotels and resorts

● Schools and campuses

Conclusion

Zero-rewiring LoRaWAN FCU thermostats offer fast, cost-effective, and tenant-friendly retrofit solutions. They simplify installation, enable energy savings, and improve ROI for commercial HVAC projects.

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