KTRRB-052.245
Room thermostat for cooling ceilings, surface-mounted, 24V AC/V DC, 2-/4-pipe, off/comfort/ECO switch
Electronic surface-mounted climate controller for controlling heating/cooling in 2- and 4-pipe systems for hotels, residential properties and business premises. Up to 5 valve actuators (24V~, closed when de-energised or open when de-energised) can be controlled for each output. The switch can be used to select the off/comfort/ECO operating modes. Especially suitable for controlling cooling ceilings due to the option of dew point monitoring via optional external dew point sensors. In order to compensate for the inertia of control paths with cooling ceilings, the device has a temperature sensor input for activating an external radiation sensor (optional). The factory preset “zero point” of approx. 21…°C can be adjusted by +/- 5K in the device. The adjustment knob can be used to adjust the set temperature within the range +/- 3K of the set zero point. As a variant for public authorities that need the controller to be inaccessible to unauthorised people, the external sensor can also be implemented as a room sensor (optional). Using an internal Poti adapter, internal or external sensors, or both sensors, can be selected using adjustable weighting. Contact inputs for ECO function and OFF (frost protection).
Art.-Nr.: DA420700
Technical data
| Actual temperature display | No |
| Additional heating switch | No |
| Ambient temperature, lower value | 0 °C |
| Ambient temperature, upper value | 40 °C |
| Assembly | Complete device |
| Bearing temperature, lower value | -20 °C |
| Bearing temperature, upper value | 70 °C |
| Colour | Pure white |
| Control behaviour | 2-point |
| Control range, lower value | 13 °C |
| Control range, upper value | 29 °C |
| Cooling control function | Yes |
| Degree of contamination | 2 |
| Depth | 25,5 mm |
| Design | Berlin 2000 |
| Display | No |
| ECO function (reduction) | Yes |
| ECO input (reduction) | 24 V AC / 50 Hz, 24 V DC |
| Electric connection | Screw terminals |
| Electronic control | Yes |
| Energy efficiency class | I |
| External setting | Yes |
| Heating / cooling switch | No |
| Heating control function | Yes |
| Height | 83,4 mm |
| Housing material | Plastic ABS |
| Maximum air humidity (non-condensing) | 95 % r.H |
| Maximum switching current | 1 A |
| Maximum switching voltage | 24 V AC / 50 Hz, 24 V DC |
| Mechanical range reduction | Yes |
| Minimum switching voltage | 24 V AC / 50 Hz, 24 V DC |
| Mounting / attachment | Surface mounting |
| Neutral zone | Approx. 2 K |
| Number of outputs | 2 |
| Number of outputs, cooling | 1 |
| Number of outputs, heating | 1 |
| Off / comfort / ECO switch | Yes |
| On / Off switch | No |
| Operating voltage | 24 V AC / 50 Hz, 24 V DC |
| Operation | Rotary knob and switches |
| Output signal | Switching (24 V AC, 50 Hz and/or 24 V DC) |
| Potential free switching contact | No |
| Protection class | III |
| RAL colour number (similar) | 9010 |
| Safety and EMC | In accordance with DIN EN 60730 |
| Scale | Threshold arrows with ”+” and ”-“ |
| Sensor element | NTC internal, optional NTC external |
| Surface properties | Matt |
| Switch/lamp night-time reduction | No |
| Switching contact | 2 normally open contacts |
| Switching difference | Approx. 1 K |
| Switching difference, can be adjusted | No |
| Switching element | Relay |
| Switching power | 24 W |
| Temperature controller version | Climate controller |
| Thermal feedback | No |
| Type of protection | IP30 |
| Width | 78,3 mm |
| With explosion protection | No |
| Circuit diagram | |
| Circuit diagram | |
| Photo | Type | Articlenumber | Features | Kind |
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