TVM SERIES
VAV air flow controllers for two-channel variable air flow systems with increased noise requirements
Individual temperature control in a room or in a separate zone
With built-in high-performance silencer
Electronic controllers (Easy and Universal) for various applications
Allowable air speed up to 13 m/s
Damper tightness according to EN 1751, class 4
Housing tightness according to EN 1751, class A
Optional equipment
Soundproofing coating to reduce noise generated by the chassis
Additional silencer TS Series to reduce noise generated by air flow
Description
The VAV air flow controller is equipped with two effective pressure sensors to measure air flow: one in the cold air flow and one in the general air flow.
Control components (optional accessories) include two effective pressure sensors that convert effective pressure into an electrical signal, two controllers and two actuators; e.g. Compact controller or with individual components.
In most cases, the setpoint for a two-channel controller comes from the room temperature controller. The room thermostat controls the cold air flow controller and indicates the set value of the cold air flow from 0 to the maximum flow qᵥmax. The controller compares the actual value with the set value and modifies the damper actuator control signal if there is a difference between the two values. The warm air/general regulator is set to the minimum flow rate qᵥmin and controls the damper flap in the heat duct. As a consequence, an appropriate proportion of warm air is added. As cooling demand increases, the warm air damper closes so that only cool air ends up flowing. A built-in silencer reduces noise caused by restricted airflow. The air flow rate on the room side, due to the larger rectangular cross-section, is approximately half the speed in a circular duct.
1 flap for qv,cold
2 Double seal
3 Effective pressure sensor for qv,cold
4 Control component, e.g. Compact controller
5 Inspection window
6 Effective pressure sensor for qv,tot
7 Noise insulation
8 Valve flap for qv,warm