C505G 16A NTC Programmable Thermostat for Electric Floor Heating & Gas Boiler Server, Temperature Calibration

Compact C505G thermostat (16A, NTC) designed for electric underfloor heating and gas boiler server control. It provides both automatic and manual operation — in automatic mode it follows your weekly schedule to reduce energy waste, while manual override is available when needed. Weekly scheduling: configure multiple comfort periods with up to 6 time slots on each working day and 2 time slots on each rest day. Choose one of three day-grouping schemes: 5+2, 6+1 or 7 (the first number denotes working days, the second denotes rest days). Temperature calibration and control: the display temperature can be offset in the range -8~8 (steps of 0.5). Control adjustment resolution is 0.5 and the adjustable control span (differential) ranges from 0.5~5. Antifreeze and memory: antifreeze mode automatically starts heating if the temperature falls below 5°C to protect the system. All settings are preserved after a power failure, so no reprogramming is required. Relay/linkage delay: factory default delay is 5 minutes; this can be changed between 0 and 5 minutes to suit your installation and protect connected equipment.