Salus S-Series Worcester RF Boiler Interface ST620WBC

The Salus S-Series Worcester RF Boiler Interface (ST620WBC) is a wireless programmable room thermostat and plug‑in RF boiler control designed specifically for Worcester Bosch boilers, providing time and temperature control with simple radio frequency communication.

Product Description

The ST620WBC combines an S‑Series digital programmable thermostat with an integral RF boiler module that plugs directly into compatible Worcester Bosch boilers in place of the standard time clock or blanking plate. It offers full 7‑day or 5/2‑day programming, touch ring user interface, and frost protection to improve comfort and efficiency.

Key Features

• Boiler interface: Plug‑in RF boiler control that replaces the Worcester time clock/blanking plate and provides ON/OFF switching.
• Wireless control: RF communication at 868 MHz with up to 30 m indoor range (approx. 100 m open‑air).
• Programmable thermostat: 7‑day or 5/2‑day scheduling with up to 6 time/temperature periods per day.
• User interface: Touch Ring technology, large backlit LCD, manual override and holiday mode.
• Safety & protection: Frost protection function and service reminder capability.
• Power: Battery‑powered thermostat with low battery/replacement indicator.

Boiler RF Module Features

• Plug‑in connection: Direct mechanical and electrical fit to compatible Worcester Bosch boilers.
• LED status indication: Shows heat demand and RF status.
• 3‑position mode switch: ON (continuous), AUTO (follows ST620 program), OFF (boiler off).
• SYNC button: For pairing the boiler module with the ST620 thermostat.

Technical Specifications

• Model: ST620WBC (S‑Series programmable thermostat with RF boiler module).
• Control type: Electronic programmable thermostat, ON/OFF or PWM control.
• Temperature range: Typically 5–35°C with 0.5°C resolution.
• RF frequency: 868 MHz, secure RF transmission.
• RF range: Up to 100 m free air, approx. 30 m indoors.
• Operating temperature (thermostat): 0°C to +50°C.
• Power supply (thermostat): Batteries (with memory backup via EEPROM).

Compatibility & Applications

• Compatible boilers: Selected Worcester Bosch combi and system boilers that accept the Salus plug‑in RF module (e.g. Greenstar i, CDi, Si Compact, Highflow ranges – check boiler literature).
• Applications: Room temperature control and timed heating for domestic Worcester Bosch boiler installations where a wireless programmable thermostat is required.