BR
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TECHNICAL INFORMATION BR ROUND VAV UNIT Variations EIR3 IBRD Galvanised round VAV unit with low resistance damper blade, supplied with an electronic actuator and aluminium differential pressure sensor. This VAV unit can be applied for regulating constant or variable air volumes based on air quality and/or temperature. The damper blade is equipped with an air tight seal and maintenance free bearings. The laser welded housing meets Class C following EN 12237, damper blade meets Class 2 following EN 1751. Available without (BSS) and with (BSD) insulation, and external sound attenuators. Aluminium extruded differential pressure sensor with an operating range between 0,8 -12 m/s. Class C housing following EN 12237 Air volume controlled actuator with integrated display and controls (no external equipment required) ACCESSORIES UR SIL circular duct silencers

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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 ([m³/h] or [l/s]) corresponding at a sensor...

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• Duct velocities larger than 1.2 m/s are recommended, and should not go below 0,8 m/s. At lower air velocities measurement accuracies cannot be guaranteed. • The above volume flow rate accuracy applies only to situations with a straight upstream section of the duct according to ISO 5219 / EN 1751, and measured according ISO 3966. The actuators show a measurement error of <5% with respect to ISO 3966 in the recommended working range. Direct upstream mounting of a 90° bend on the VAV results in a measurement error of <5%. NOMINAL AIR FLOW (VNOM (@ 250 Pa) 0 Catalogue, specifications subject...

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SELECTION SOUND PRESSURE LEVEL AT DIFFERENTIAL PRESSURE OF 100 Pa SOUND PRESSURE INCLUDING TYPICAL CEILING ATTENUATION AND ROOM ABSORPTION AIR FLOW CONTROLLERS IbrI- P5 Catalogue, specifications subject to change ©2016

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SOUND PRESSURE LEVEL AT DIFFERENTIAL PRESSURE OF 150 Pa 0 SOUND PRESSURE INCLUDING TYPICAL CEILING ATTENUATION AND ROOM ABSORPTION AIR FLOW CONTROLLERS IbrI- P7 Catalogue, specifications subject to change ©2016

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SOUND PRESSURE LEVEL AT DIFFERENTIAL PRESSURE OF 500 Pa 0 SOUND PRESSURE INCLUDING TYPICAL CEILING ATTENUATION AND ROOM ABSORPTION AIR FLOW CONTROLLERS IbrI- P9 Catalogue, specifications subject to change ©2016

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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 BR - P11 AIR FLOW CONTROLLERS BR Catalogue, speciﬁcations s

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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 BR - P12 Catalogue, speciﬁcations subject to c

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0 |mm) G1: with 227VM controller (signal voltage 0/2-10V, volume flow rate can be adjusted on the controller) G2: with 227PM controller (pressure control, volume flow rate can be adjusted on the controller) B5 : with Belimo LMV-D3-MP (signal voltage 0/2-10V, minimum and maximum* volume flow rate have to be specified) - : without motor S: single-walled round VAV D: double-walled round VAV * the lawest maximum airflow = 20%Vnom. • Vmax corresponds to the air flow rate at a duct air velocity of 10 m/s. • Vmin corresponds to the air flow rate at a duct air velocity of 1.5 m/s. • Mode 2 - 10 V...

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