AC817F Digital 3-Speed RS485 Fan Coil Thermostat — Budget-Friendly Modbus Control for 2/4-Pipe Systems
RS485 Modbus Built-in
Native RS485 interface for direct BMS integration. Centralized monitoring and control at budget price point.
3-Speed Fan Control
High/Medium/Low fan speed selection with intelligent auto-mode. Optimized comfort with minimal energy waste.
Best-Value Connectivity
RS485 Modbus at $5-8 per unit. Enterprise-grade building control without the enterprise price tag.
Quick Installation
Standard 86×86mm wall-mounted design. Clear terminal labeling for error-free field wiring.
Reliable Build
Durable PC+ABS housing tested for continuous commercial operation. 3-year warranty included.
Project-Ready
Designed for bulk procurement with consistent quality across all units. 31-day delivery for 1,000-piece orders.
At a Glance
Product Overview
The AC817F is Telin’s budget-optimized RS485 thermostat, delivering enterprise-grade Modbus building control at $5-8 per unit. Designed for 2-pipe and 4-pipe fan coil units, it features 3-speed fan control, ON-OFF relay switching, and native RS485 Modbus RTU integration — making it the most cost-effective way to deploy centralized HVAC management across large-scale hotel, apartment, and commercial projects.
At a competitive price point with 100-piece MOQ and 31-day delivery, the AC817F is the ideal choice for developers and contractors seeking reliable networked temperature control without the premium of WiFi-equipped alternatives. Full OEM/ODM customization supported.
Product Features
📡 Zero-Cost BMS Connectivity
Unlike thermostats requiring expensive gateway modules or proprietary adapters, the AC817F connects directly to your RS485 Modbus network. No middleware, no licensing fees, no hidden costs — just transparent building control at a fraction of the typical price.
📈 Optimized for Scale
At $5-8 per unit, a 500-room hotel can deploy intelligent zoned HVAC control for under $4,000 in thermostat hardware. Combined with 31-day delivery and 3-year warranty, the total cost of ownership dramatically undercuts competing networked solutions.
🎵 3-Speed Intelligent Control
The AC817F’s auto-mode intelligently selects between High, Medium, and Low fan speeds based on the temperature differential — reducing unnecessary energy consumption while maintaining consistent comfort levels throughout the day.
🛠 Simplified Maintenance
Front-panel diagnostic indicators and clearly labeled RS485 terminals make on-site troubleshooting fast and intuitive. Building maintenance teams can identify and resolve issues without specialized HVAC training.
Product Parameters
⚡ Electrical
📏 Mechanical
🌡 Environment
Dimensions & Installation
Application Scenarios
The AC817F’s RS485 connectivity and budget pricing enable large-scale networked deployment without breaking the project budget.
Budget Hotel Chain
Enterprise-grade RS485 temperature control at $5-8 per room. Centralized monitoring without the cost of WiFi models.
Apartment Complex
Daisy-chain RS485 wiring across floors for unified HVAC management. Lowest cost per node in its class.
Office Building
Modbus BMS integration with per-floor zone control. Schedule-based energy optimization without WiFi dependency.
Ready to Discuss Your Project?
Get pricing, request samples, or consult our engineers about your custom HVAC control requirements.
Hubei Telin energy-saving equipment Co., Ltd (Production Base)
Add: No.1 Lingcheng Industrial Park, Lingxiang Town, Daye, Huangshi City, Hubei Province, China.
✉ sales@sztelin.com | ☎ +86 13410830001
