VarioflowBOX COMF 100 ventilation box

Functions

The box is used for autonomous control of supply and exhaust air to the ventilated space in central ventilation systems.

Construction

The galvanized box with removable inspection cover houses two flow controllers for supply and extract air to the ventilated space. For connection to the circular duct, the box is equipped with four circular throats, which are fitted with a lip seal. The damper located in the box has class 2 leakage according to EN1751 when closed. The control actuators are equipped with a thermo-anemometric air flow sensor. The box housing is fitted with clamping profiles with four oval holes for wall or ceiling mounting.

Electrical

Power supply voltage 1× 230 V / 50 Hz. The box is equipped with a 230 V / 24 V power supply unit with a connection cable terminated with a 230 V plug. The built-in flow controllers are completely connected inside the box with the power supply unit. The air flow through the box can be controlled by an analogue signal of 0...10 V from the remote control or by an external humidity, CO₂ or VOC sensor with an output signal of 0...10 V, which can be directly connected to the power supply unit of the box (power supply of the sensors is possible with either 24 V or 230 V). The regulated amount of air in the supply branch of the box is the same as in the exhaust branch of the box (INPUT = OUTPUT). The degree of protection of the box is IP20.

Mounting

Mounted on the wall or ceiling with the airflow directions horizontal or vertical. The box can also be mounted in a 600 mm wide furniture cabinet. It is necessary to observe the air flow directions shown by the arrows on the lid of the box. The load capacity of the anchors for wall or ceiling mounting must correspond to the weight of the box. Adequate access must be provided to allow removal of the service box lid (i.e. if located in a suspended ceiling, the suspended ceiling must be provided with an inspection opening for easy access to the inspection box lid).

Conditions of Operation

Maximum air velocity is 5 m/s. The maximum possible pressure difference before and after the damper is 900 Pa. The temperature range of the conveyed air is from 0° C to +50° C. Max. relative humidity of the flowing air up to 95% r.v. (condensation must be prevented on the surface of the box or on the internal components of the box). The air flowing through the box must be free of adhesive and abrasive impurities to prevent fouling of the flow rate sensor and control damper.