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Installation And User Instructions. GB. Devimat™ Warm Floor System. Installation Instructions. User Guide. Trouble ShooterUser's Guide - devireg™550 Thermostat. Introduction devireg™ 550 is an adaptive temperature control- ler, specially designed for floor heating systems. User's Guide - Devireg™550 Thermostat. Introduction. Devireg™ 550 is an adaptive temperature control- ler, specially designed for floor heating systems. - Install the Floor sensor and choose only the Floor sensor in Basic Settings. Total Room Heating: - Control of room temperature in living rooms etc. - Install Let the thermostat cool down and ensure the thermostat has been wired as stated in instructions. Ensure the floor sensor resistance is between 10k-24k Ohms.