Continuous electronic climate controller, KTRVB Surface-mounted installation – Design Berlin 2000
Type/image
Item no.
Features
Circuit diagram PG
KTRVB-052.244
General features: External dew point sensor; ECO function; “heating/cooling/cooling interruption due to condensation/ off” display; “sensor rupture/sensor short-circuit/frost protection” display; operating mode “off with frost protection monitoring”; relative scale Ambient temperature: 0 … 40 °C Output signal: consistently 0…10 V or 10…0 V (can be switched using a jumper), max. 5 mA Sensor: NTC internal, optional external “Sensor 2” (see “Sensors”)* External flow sensor (H/C sensor): for automatic switching of the controller to heating or cooling mode depending on the inflow temperature; alternatively, this input can be used as a “Sensor 2” H/C changeover contact ECO contact: Upon closing the contact, the ECO function is actuated (in heating mode, the temperature is adjusted down by 3 K and in cooling mode it is adjusted up by 3 K) Forced switch-off contact: External switch-off function with frost protection monitoring Control function: heating and/or cooling with p-band 1 K, cooling interruption upon condensation of the dew point sensor, frost protection function in “off” state Control range: 13 … 29 °C Setting range: 21 °C ± 8 K Hysteresis: 0 K, since control is always via the p-band in the range from 1 K Neutral zone: Approx. 2 K Pipe system compatibility: 2-pipe and 4-pipe
DA451500
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KTRVB-052.245
DA451600 like KTRRB-052.244 but with “off/comfort/cooling” switch
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* An internal trimming potentiometer can be used to select whether control should be based on the internal (left stop) or external sensor (right stop). In the intermediate positions, if both sensors are used, a weighting is applied to the internal room sensor and the external radiation sensor. The weighting allows for compensation of different structural conditions such as large window areas or cardinal directions. For very slow controlled systems, it is recommended to assign a higher weighting to the radiation sensor than to the internal room sensor.
KTRVB
Catalogue 2022 | Page 134
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