Floor heating central controller SALUS KL08RF 8-zone relay module for underfloor heating

The SALUS KL08RF is an 8-zone relay module designed for centralised control of underfloor heating systems. As a floor heating central controller, it provides individual relay outputs for up to eight independent zones, enabling coordinated switching of actuators, zone valves or boilers via connected room thermostats or a compatible control system. The unit is intended for residential and light commercial installations where reliable sequencing and centralized management of multiple circuits is required.

Advantages

The controller offers eight relay outputs in a compact enclosure, simplifying wiring and reducing the need for multiple individual relays. It supports coordinated control of heating zones, which helps maintain set temperatures in separate rooms or areas. The module integrates with compatible thermostats and central controllers, enabling automated sequencing and safe switching of actuators without manual intervention. Installation and maintenance are facilitated by clear terminal access and standard relay interfaces.

Suitable for

• Residential underfloor heating systems with multiple zones
• Small commercial installations requiring independent zone control
• Integration with room thermostats and central heating management
• Retrofit projects where centralised relay control reduces wiring complexity

Key specifications

• Number of relay outputs: 8 independent channels for zone actuators
• Relay output type: standard switching relays suitable for valves and actuators
• Mounting: DIN-rail or panel-compatible enclosure for electrical cabinets
• Supply voltage: designed for low-voltage control systems used in heating installations
• Control interfaces: local thermostat inputs and compatibility with central controllers
• Protection and safety: enclosed relay housing with accessible terminals for safe wiring

How to use

Mount the relay module in a suitable electrical enclosure or on a DIN rail close to the manifold or actuator group. Connect the supply and each zone actuator or valve to the corresponding relay output following the wiring diagram supplied with the unit. Pair or configure the module with compatible room thermostats or a central controller according to the manufacturer's instructions to establish zone control logic and temperature setpoints. Verify proper operation of each output and configure any required sequencing or boiler interlock to prevent short cycling.

Usage recommendations

Install and commission the module only by a qualified electrician or heating engineer. Use the module together with compatible actuators and thermostats from recognised manufacturers to ensure reliable operation. Observe local electrical regulations and match the relay module's supply requirements to the installation. For optimal performance, configure boiler interlock and minimum on/off times as recommended by the heating system designer.