BB
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TECHNICAL INFORMATION BB EXTRA SOUNDPROOF RECTANGULAR VAV UNIT Variations IBBA BBT VAV / CAV box being used for both supply (BBT) and exhaust (BBA). The galvanized steel unit is equipped with an electronic actuator and aluminum differential pressure sensor. Casing and blade damper are rated class C3 according to air tightness standards EN12237 and EN1751. Excellent sound attenuation levels are obtained by mineral wool casing insulation and internal baffles. May be equipped with heat exchanger for cooling/heating. Available with extra external sound attenuator. Designed for flow rates from 75 up to 6000 m3/h Available in 7 sizes Standard equipped with silencer Optionally, a heat exchanger can be mounted on the box outlet AIR FLOW CONTROLLERS |BBA|BBT- P1

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EXTRA SOUNDPROOF RECTANGULAR VAV UNIT BBA BBT MEASUREMENT OF THE VOLUMETRIC AIR FLOW RATE - GRADA G1 ACTUATOR • the setpoint value signal Y depends on the chosen mode, i.e. 0-10 V DC or 2-10 V DC. The lower and upper limit correspond to V̇min and V̇max respectively. Speciality of input mode 2-10 V DC: in the range of Y = 0-0.8 V DC the override command Close will be detected. • the output/feedback signal U represents the actual flow and follows the selected mode of operation (0-10 V DC or 2-10 V DC). The signal U is proportional to the selected V̇nom value. • V̇nom: nominal volume flow rate...

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• Duct velocities larger than 1.2 m/s are recommended, and should not go below 1 m/s. At lower air velocities measurement accuracies cannot be guaranteed. AIR FLOW CONTROLLERS IBBA BBT - P4 Catalogue, specifications subject to change ©2018

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EXTRA SOUNDPROOF RECTANGULAR VAV UNIT BBA BBT BA/BT ACTUATOR SETUP ﬂow/unit Vmin example: V̇min = 300 m3/h l/s diag m3/h Vmin diag Vmin diag 3. V̇MIN VALUE SETUP 2. V̇MAX VALUE SETUP Vmax diag Vmin diag oP(en) opens the damper cL(ose) closes the damper Hi(gh) activates V̇max On Diagnostic Mode is on, engine off Off Diagnostic Mode is off, display Y target AIR FLOW CONTROLLERS BBA BBT - P11 AIR FLOW CONTROLLERS BBA BBTCatalogue, specifications sub

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EXTRA SOUNDPROOF RECTANGULAR VAV UNIT BBA BBT WIRING DIAGRAMS MASTER SLAVE CONTROL FORCED CONTROL The controller can be force controlled to following positions via closing contacts. Vmax Open Close: Y = connected to ground conductor of 24 VAC supply (only with mode 2-10 V DC) V̇min: Y = disconnected V̇max: Y= full wave from 24 VAC supply Open: Y = pos. rectified half wave from 24 VAC supply AIR FLOW CONTROLLERS BBA BBT - P12 Catalogue, specifications subject to chang

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EXTRA SOUNDPROOF RECTANGULAR VAV UNIT BBA BBT G1: with 227VM controller (flow control) G2: with 227PM controller (pressure control) B5: with Belimo LMV-D3-MP (flow control) L: left hand side construction R: right hand side construction Uitvoering rechts Left hand side construction Uitvoering links Right hand side construction EXHAUST 8 Right hand side construction Uitvoering links Left hand side construction Uitvoering rechts FACTORY SETTINGS - GRADA G1 ACTUATOR • V̇max corresponds to the air flow rate at a duct air velocity of 10 m/s. • V̇min corresponds to the air flow rate at a duct air...

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