6606RH hydronic floor heating thermostat with RS485
Key Specifications
· Smart thermostat for hydronic (water) floor heating
· RS485 connecting interface (optional) · Linkage function (optional)
· 86×86×41mm · 178g
The 6606RH is a hydronic floor heating thermostat with RS485, designed for water‑based underfloor heating systems. It supports optional RS485 Modbus for building automation and linkage function for device‑to‑device coordination. With 5+2/7‑day scheduling, frost protection, and high‑temp cutoff, it offers reliable control for residential and commercial projects.
This thermostat supports Modbus RTU communication. For more information about the Modbus protocol, visit the Wikipedia page.
Why Choose 6606RH Hydronic Floor Heating Thermostat with RS485
· RS485 Modbus Ready – Optional RS485 interface for building automation and central control
· Linkage Function – Optional transceiver-based device-to-device automation (e.g., with AC or fresh air)
· Compact Size – 86×86×41mm fits standard wall boxes
· Lightweight – Only 178g for easy installation
6606RH Hydronic Floor Heating Thermostat with RS485—Operation Functions
1. Core Control
– Valve Regulation: Controls hot water flow to radiators/floor pipes based on room temperature vs. setpoint.
– Heating ON when room temp < setpoint; Valve closes when temp ≥ setpoint.
2. Safety Protections
– High-Temp Cutoff (60°C): Auto-shuts valve if floor sensor ≥60°C.
– Sensor Failure: Displays Err/ E1/ E2 and locks heating output.
– Frost Protection: Forces heating ON if room temp < user-defined threshold (e.g., 5°C).
3. Programming Features
– 5+2/7-Day Scheduling: 6 time periods per day, separate settings for weekdays/weekends.
– Economy Mode: Pre-set energy-saving temperatures for unused periods.
4. Advanced Operations
– Key Lock**: Long-press ▲+▼ for 5s to enable/disable child lock.
– Floor Temp Display**: Long-press ▲ for 5s (dual-sensor models only).
– Advanced Settings**: Long-press Mode+Clock for 5s (off state) to configure:
– Frost protection threshold
– High-limit temperature (AL function)
– Sensor calibration
5. Technical Safeguards
– Low-Temp Auto-Start: Activates heating below user-set frost threshold.
– Post-Failure Recovery: Resumes operation only after fault clearance (e.g., sensor replacement).