CRA24-B1P 3-step Switch, Button/LED, AC 24 V - Belimo

CRA24-B1P 3-step Switch, Button/LED, AC 24 V

• Volume control
• 1 output VAV, AC 24 V
• Mode selection and display: COMF/MIN/MAX
• Setpoint COMF regulation under cover
• Housing colour white RAL 9003
• Colour of socket light grey NSC 2005/R80B

Air volume control strategy: The air volume can be pre-selected and set to minimum, variable (dial: 30 … 70%) and maximum using the push-button and the rotary knob on the controller front. This is especially suitable for applications requiring a defined air exchange. The heating output is not available.

Room temperature control strategy: The desired comfort temperature can be selected using the rotary knob. The room controller  controls the air volumes as well as the heating valve on the basis of the set parameters.

Override kitchen: Pressure differences caused by the kitchen hood fan or the chimney extraction system are balanced out largely by reducing the exhaust air volume.

Override bathroom: Volume currents are increased to the maximum air change, e.g. in order to draw off humid air from rooms as quickly as possible.

Energy hold off (EHO): The room is controlled in the energy saving mode, i.e. the VAV units are closed and the heating setpoint is lowered to the value for the room protection function during long periods of absence, for example.

Room protection (Frost): If the current room temperature falls below 14°C, the room protection function is activated.

External temperature sensor: An external temperature sensor can be connected to the analogue input ai1, e.g. in the exhaust air duct for calculating the average room temperature.

Electrical data:

• Nominal voltage AC 24V 50/60 Hz
• Dimensioning 3 VA, without actuators
• Power supply range AC 19.2 … 28.8V
• Connections Terminal block 1 … 3: 2.5 mm2
• Terminal block 4 … 12: 1.5 mm2

Dimensions (H x W x D): 99 x 84 x 32 mm

Weight: 105 g

Housing colours:

• Baseplate NCS2005-R80B light grey (corresponds approximately to RAL 7035)
• Cover RAL 9003 Signal white