[Solved] Multi-channel thermostat in a modular system for electrical fittings

The discussion addresses the challenge of controlling underfloor heating temperature in multiple rooms from a single location using a modular multi-channel thermostat. The user seeks a thermostat that fits into a 3-gang frame and can independently control four zones (rooms) with separate valves or pumps. Existing modular thermostats typically offer only single-channel control. It is noted that multi-channel controllers require individual temperature sensors in each room to function properly. One suggested solution involves mounting the executive control module on a DIN rail in an electrical box, connected via RJ45 cable to the main controller, with temperature sensors placed in the screed, under parquet flooring, or on walls. Some underfloor heating systems use wall-mounted regulators controlling valves in manifold boxes, but these often operate in simple open-close mode rather than proportional control. The user also considers electrical wiring concerns for a secondary control box on the first floor, discussing cable cross-section requirements. Despite efforts, no suitable multi-channel thermostat was found; instead, multiple solenoid valves were connected to a single controller, resulting in uniform temperature settings across zones. The user references the Lithotherm system, which uses expanded clay slabs poured with a special mixture for underfloor heating installation under parquet floors.
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