KTRTB-211.108 and 251.108 “ultra-thin”, Surface Mounted Installation (Air Conditioning Technology)
This controller was specifically designed for heating/cooling regulation of 2 pipe systems used in hotels, homes and offices, can control up to five valve actuators (normally closed).
The KTRTB’s internal sensor measures the room temperature and activates heating or cooling depending on the deviation from the configured setpoint temperature. As the switching element used is a triac rather than a relay or bimetal, the system operates silently.
ECO function: if this function is selected, the temperature is adjusted down by 3 K in heating mode and up by 3 K in cooling mode.
Ambient temperature: 0 … 40 deg C
Storage temperature: -20 … +70 deg C
KTRTB-211.108 Operating voltage 230 VAC, 50 Hz, protection class II if properly mounted
KTRTB-251.108 Operating voltage 24 VAC, 50 Hz, protection class III, protective low voltage
