{"id":10963,"date":"2025-11-05T11:32:08","date_gmt":"2025-11-05T10:32:08","guid":{"rendered":"https:\/\/alre.de\/produkte\/room-thermostat-for-chilled-ceilings-surface-mounted-24vac-vdc-2-4-pipe-switch-off-comfort-eco\/"},"modified":"2025-11-05T11:33:17","modified_gmt":"2025-11-05T10:33:17","slug":"room-thermostat-for-chilled-ceilings-surface-mounted-24vac-vdc-2-4-pipe-switch-off-comfort-eco","status":"publish","type":"produkte","link":"https:\/\/alre.de\/en\/produkte\/room-thermostat-for-chilled-ceilings-surface-mounted-24vac-vdc-2-4-pipe-switch-off-comfort-eco\/","title":{"rendered":"Room thermostat for chilled ceilings, surface-mounted, 24VAC\/VDC, 2-\/4-pipe, switch Off\/Comfort\/ECO"},"content":{"rendered":"[vc_row type=”in_container” full_screen_row_position=”middle” column_margin=”default” column_direction=”default” column_direction_tablet=”default” column_direction_phone=”default” scene_position=”center” text_color=”dark” text_align=”left” row_border_radius=”none” row_border_radius_applies=”bg” overlay_strength=”0.3″ gradient_direction=”left_to_right” shape_divider_position=”bottom” bg_image_animation=”none”][vc_column column_padding=”no-extra-padding” column_padding_tablet=”inherit” column_padding_phone=”inherit” column_padding_position=”all” background_color_opacity=”1″ background_hover_color_opacity=”1″ column_shadow=”none” column_border_radius=”none” column_link_target=”_self” gradient_direction=”left_to_right” overlay_strength=”0.3″ width=”1\/1″ tablet_width_inherit=”default” tablet_text_alignment=”default” phone_text_alignment=”default” column_border_width=”none” column_border_style=”solid” bg_image_animation=”none”][vc_column_text]\n
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<\/div>\n<\/div>\n[\/vc_column_text][\/vc_column][\/vc_row]\n[vc_row type=”in_container” top_padding=”80″ full_screen_row_position=”middle” column_margin=”default” column_direction=”default” column_direction_tablet=”default” column_direction_phone=”default” scene_position=”center” text_color=”dark” text_align=”left” row_border_radius=”none” row_border_radius_applies=”bg” overlay_strength=”0.3″ gradient_direction=”left_to_right” shape_divider_position=”bottom” bg_image_animation=”none”][vc_column column_padding=”no-extra-padding” column_padding_tablet=”inherit” column_padding_phone=”inherit” column_padding_position=”all” background_color_opacity=”1″ background_hover_color_opacity=”1″ column_shadow=”none” column_border_radius=”none” column_link_target=”_self” gradient_direction=”left_to_right” overlay_strength=”0.3″ width=”1\/3″ tablet_width_inherit=”default” tablet_text_alignment=”default” phone_text_alignment=”default” column_border_width=”none” column_border_style=”solid” bg_image_animation=”none”]\n

KTRRB-052.245<\/h1>\n

Room thermostat for chilled ceilings, surface-mounted, 24VAC\/VDC, 2-\/4-pipe, switch Off\/Comfort\/ECO<\/h2>\n
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Electronic surface-mounted climate controller for heating\/cooling control in 2- and 4-pipe systems for hotel, residential and commercial premises. Up to 5 valve actuators (24V~, normally closed or normally open) can be controlled per output. The switch can be used to select between the operating modes Off\/Comfort\/ECO. Particularly suitable for cooling ceiling control due to the possibility of dew point monitoring via optional external dew point sensors. To compensate for the inertia of controlled systems with chilled ceilings, the device has a temperature sensor input for connecting an external radiation sensor (optional). The external sensor can also be designed as a room sensor (optional) as an official variant, where the controller should be inaccessible to unauthorized persons. An internal potentiometer can be used to select the use of the internal or external sensor or the use of both sensors with an adjustable weighting. Contact inputs for ECO function and OFF (frost protection).<\/div>\n
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    Art.-Nr.: DA420700<\/h5>\n[\/vc_column][\/vc_row]\n[vc_row type=”full_width_background” full_screen_row_position=”middle” column_margin=”default” column_direction=”default” column_direction_tablet=”default” column_direction_phone=”default” scene_position=”center” bottom_padding=”0″ text_color=”dark” text_align=”left” row_border_radius=”none” row_border_radius_applies=”bg” overlay_strength=”0.3″ gradient_direction=”left_to_right” shape_divider_position=”bottom” bg_image_animation=”none” shape_type=””][vc_column column_padding=”no-extra-padding” column_padding_tablet=”inherit” column_padding_phone=”inherit” column_padding_position=”all” background_color_opacity=”1″ background_hover_color_opacity=”1″ column_shadow=”none” column_border_radius=”none” column_link_target=”_self” gradient_direction=”left_to_right” overlay_strength=”0.3″ width=”1\/1″ tablet_width_inherit=”default” tablet_text_alignment=”default” phone_text_alignment=”default” column_border_width=”none” column_border_style=”solid” bg_image_animation=”none”][tabbed_section style=”minimal” alignment=”left” spacing=”default” tab_color=”Accent-Color” cta_button_style=”accent-color” icon_size=”24″][tab icon_family=”none” title=”Technical Data” id=”1615889093454-3″ tab_id=”1615889093455-1″][vc_row_inner column_margin=”default” column_direction=”default” column_direction_tablet=”default” column_direction_phone=”default” text_align=”left”][vc_column_inner column_padding=”padding-2-percent” column_padding_tablet=”inherit” column_padding_phone=”inherit” column_padding_position=”right” background_color_opacity=”1″ background_hover_color_opacity=”1″ column_shadow=”none” column_border_radius=”none” column_link_target=”_self” gradient_direction=”left_to_right” overlay_strength=”0.3″ width=”1\/1″ tablet_width_inherit=”default” column_border_width=”none” column_border_style=”solid” bg_image_animation=”none”][vc_column_text]\n

    Technical Data<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
    Actual temperature display<\/td>\nNo<\/td>\n<\/tr>\n
    Additional heating switch<\/td>\nNo<\/td>\n<\/tr>\n
    Ambient temperature<\/td>\n0\u202f\u2026\u202f40\u00a0\u00b0C<\/td>\n<\/tr>\n
    Assembly<\/td>\ncomplete device<\/td>\n<\/tr>\n
    Bearing temperature<\/td>\n\u201320\u202f\u2026\u202f70\u00a0\u00b0C<\/td>\n<\/tr>\n
    Colour<\/td>\npure white<\/td>\n<\/tr>\n
    Control behaviour<\/td>\n2-point<\/td>\n<\/tr>\n
    Control range<\/td>\n13\u202f\u2026\u202f29\u00a0\u00b0C<\/td>\n<\/tr>\n
    Cooling control function<\/td>\nYes<\/td>\n<\/tr>\n
    Degree of contamination<\/td>\n2<\/td>\n<\/tr>\n
    Design<\/td>\nBerlin 2000<\/td>\n<\/tr>\n
    Dimensions (W x H x D)<\/td>\n78,3\u202fmm x 83,4\u202fmm x 25,5\u202fmm<\/td>\n<\/tr>\n
    Display<\/td>\nNo<\/td>\n<\/tr>\n
    ECO function (reduction)<\/td>\nYes<\/td>\n<\/tr>\n
    ECO input (reduction)<\/td>\n24\u00a0VAC, 50\u00a0Hz \/ 24\u00a0VDC<\/td>\n<\/tr>\n
    Electric connection<\/td>\nscrew terminals<\/td>\n<\/tr>\n
    Electronic control<\/td>\nYes<\/td>\n<\/tr>\n
    Energy efficiency class<\/td>\nI<\/td>\n<\/tr>\n
    External setting<\/td>\nYes<\/td>\n<\/tr>\n
    Heating\/cooling switch<\/td>\nNo<\/td>\n<\/tr>\n
    Heating control function<\/td>\nYes<\/td>\n<\/tr>\n
    Housing material<\/td>\nplastic ABS<\/td>\n<\/tr>\n
    Max. air humidity (non-condensing)<\/td>\n95 % r.H.<\/td>\n<\/tr>\n
    Max. switching current<\/td>\n1\u00a0A<\/td>\n<\/tr>\n
    Max. switching voltage<\/td>\n24\u202fVAC, 50 Hz \/ 24\u202fVDC<\/td>\n<\/tr>\n
    Mechanical range reduction<\/td>\nYes<\/td>\n<\/tr>\n
    Min. switching voltage<\/td>\n24\u202fVAC, 50 Hz \/ 24\u202fVDC<\/td>\n<\/tr>\n
    Mounting\/attachment<\/td>\nsurface mounting<\/td>\n<\/tr>\n
    Neutral zone<\/td>\n2\u00a0K<\/td>\n<\/tr>\n
    Number of outputs<\/td>\n2<\/td>\n<\/tr>\n
    Number of outputs, cooling<\/td>\n1<\/td>\n<\/tr>\n
    Number of outputs, heating<\/td>\n1<\/td>\n<\/tr>\n
    On\/Off switch<\/td>\nNo<\/td>\n<\/tr>\n
    Operating voltage<\/td>\n24\u202fVAC,\u202f50 Hz \/ 24\u202fVDC<\/td>\n<\/tr>\n
    Operation<\/td>\nrotary knob and switches<\/td>\n<\/tr>\n
    Output signal<\/td>\nswitching<\/td>\n<\/tr>\n
    Potential free switching contact<\/td>\nNo<\/td>\n<\/tr>\n
    Protection class<\/td>\nIII<\/td>\n<\/tr>\n
    RAL colour number (similar)<\/td>\n9010<\/td>\n<\/tr>\n
    Safety and EMC<\/td>\nin accordance with DIN EN 60730<\/td>\n<\/tr>\n
    Scale<\/td>\nThreshold arrows with ”+” and ”-“<\/td>\n<\/tr>\n
    Sensor element<\/td>\nNTC internal, optional NTC external<\/td>\n<\/tr>\n
    Surface finish<\/td>\nmatt<\/td>\n<\/tr>\n
    Switch\/lamp night-time reduction<\/td>\nNo<\/td>\n<\/tr>\n
    Switching contact<\/td>\n2 normally open contacts<\/td>\n<\/tr>\n
    Switching difference, can be adjusted<\/td>\nNo<\/td>\n<\/tr>\n
    Switching differential<\/td>\nHeating\/cooling: 1\u00a0K<\/td>\n<\/tr>\n
    Switching element<\/td>\nrelay<\/td>\n<\/tr>\n
    Switching power<\/td>\n24\u00a0W<\/td>\n<\/tr>\n
    Switch Off\/Comfort\/ECO<\/td>\nYes<\/td>\n<\/tr>\n
    Temperature controller version<\/td>\nclimate controller<\/td>\n<\/tr>\n
    Type of wiring<\/td>\nother<\/td>\n<\/tr>\n<\/table>\n
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