Variable Air Volume Controls

A VAV fume hood control system from TEL automatically controls exhaust and supply air for fume hoods to maximize energy cost savings while maintaining safety for hood operators.

Product Specifications

Display range: 0-999 fpm (0-5.0 m/s).

Alarm range: 0-999 fpm (0-5.0 m/s).

Control range: 30-999 fpm.

Control resolution: 1 fpm.

Control output: 0-10V DC for damper or inverter.

Control response: Less than 1 second.

Field setup: 2-point velocity calibration (with on-screen instructions).

Accuracy: Sensor-display resolution: 1 fpm; face velocity accuracy +/-10%.

Alarm delays: User definable (0 to 60 seconds).

Relay output: 4 (three on board, four on optional plug-in relay interface unit).

Analog output: 0-10V, directly proportional to velocity (optional).

Relay input: 3.

Communications Port: RS232 (can be connected via Serial interface to LAN network; full software available).

Sash high indication: Yes, with separate plug-in connection.

Night setback: Yes.

External alarm indication: Yes.

Power requirement: Input: 120VAC, 60Hz; output:15VDC, 500ma.

Units: English and metric (user selectable).

Display: Analog bar graph of VAV output or fault timeline; LEDs: red, alarm; yellow, caution; green, normal; Digital display of velocity reading (can be turned off).

Alarm indication: Red LED and audible alarm (to a certain sound spec).

Horn silence: Yes, temporary or permanent/automatic, depending on type of alarm or external input.

Auxiliary pushbuttons: 3 (typically used for fan start/stop, light on/off, scrubber pump on/off, emergency purge, etc. Buttons can be interlocked to each other).

Mounting: Semi-flush.

Operating temperature: 55 to 86°F (13 to 30°C).

Storage temperature: -40 to 150°F (-40 to 65°C).

Dimensions: Instrument Case: 5.71” H x 3.46” W x 1.38” D (148mm H x 88mm W x 35mm D).

Agency listings: CE.

Optional remote PSU/relay interface for damper control

Power requirement: Input: 120VAC, 60Hz; output: 24VDC, 500ma.

Relay output: 4 volt free change over contacts (120V 5A AC1)

Connection: 8 Way RJ45 Connector (Standard 2M length).

Enclosure material: Polystyrene.

Enclosure dimensions: 5.12” x 5.12” x 2.95” (130mm x 130mm x 75 mm).

Agency listings: VDE, CE.

Optional electric damper actuator

Power supply: 28-32V DC.

Power consumption: 15VA max.

Control signal: 2-10V DC.

Torque: 30 inches/pound or 3.5Nm at rated voltage.

Damper size: 7.5 square feet or 0.7 square inches.

Angle of rotation: 0-90 degrees, adjustable.

Direction of rotation: Reversible.

Rotation time: 1.5 seconds minimum through 90 degrees.

Ambient temperature: 0 to 140°F (-18 to 60°C).

Fail safe drive: Full rated torque, 1.5 second closure (reversible).

Electronics enclosure: UL recognized QMFZ2 Fire Rated 94V-O.

Agency listings: CE.

HSE is the exclusive North American distributor for products manufactured by TEL, Temperature Electronics Ltd. TEL makes air flow monitors for fume hoods and bio-safety cabinets, VAV fume hood control products (including room pressure controls and fresh air bleed controls) and room pressure monitors. Contact HSE at 847-680-9930.

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