Plastec Variable Air C User Manual

Laboratory Airflow Monitors & Controls

TYPE C STANDARD &

NIGHT SETBACK

LED & DIGITAL - VAV SYSTEMS

Specifications and Owner’s Manual

PLASTEC® VENTILATION, INC.

2216 60th Drive East • Bradenton, Florida 34203

[phone] • Fax [phone] • www.plastecvent.net

Laboratory Airflow Monitors & Controls

TYPE C STANDARD & NIGHT SETBACK

LED & DIGITAL - VAV SYSTEM

General Description

BENEFITS

• Safety: air flow is maintained at required speed at
all sash heights

• Energy savings: only the lowest required amount of
air is exhausted therefore reducing energy bill

• User comfort: Low air speeds ensure comfortable
noise level

• Ease of installation and maintenance

• Stable and accurate analogical sensor reading

• Attractive design: available in choice of LED or
digital display

RANGE

Versions:

• C LED: Monitors and controls air speed, LED lights

• C DIGITAL: Monitors and controls air speed, digital
read out in meter per second or feet per minute

FEATURES

• Audio and visual alarm

• 0 to 10V or 4-20mA VAV system to link to inverter

• 3 Pushbuttons: Fan On/Off, Light On/Off, Mute

• Automatic pre-purge with inverter

• 30s purge following fan switch off

• Alarm disabled when fan switch off

• Sash High indicator

• Auxiliary contact for fan make up, etc.

OPTIONS

• Surface Box Mounting: Plastic enclosure to mount
the face plate and to avoid profile cutting the

service panel.

• Alarm Relay: A remote alarm can be triggered from
a relay on the controller pcb.

• Battery Back Up: Red LED alarm is still

functional up to 12 hours when unit loses power.

• Custom Resin Stickers: Customizable resin

stickers with logo, address, etc.

INTERNATIONAL STANDARDS
COMPLIANCE

In accordance with:

- European laboratory standard EN 14175-2

- Electromagnetic standards EN
61326 : 1997/A1 : 1998/A2 : 2001/A3 : 2003

(Test report RC-05-42060-1) US FCC Part 15
Class B edition 2005 (Test report RC-05­ 42060-2-A)

- European RoHS directive governing disposal and
recycling of electronics

- French laboratory standard XPX 15203 of Sept. 1996

- CE

COMPONENTS

• Circuit Board: Panel mounted circuit board to

be installed vertically or horizontally onto fume
cupboard with 2x Ø 2.8 mm / 0.11" screws. IP55
protection ensured by “O” ring seal. Face plate to
be supplied with chemical resistant plastic sticker
(horizontal or vertical) with control/push buttons
on fascia. Surface box mounting optional.

• Numerical and Antistatic Sensor: To be installed

inside fume hood. Sensor measures air speed
variations inside fume hood. Supplied with a

3.5 m / 11.48' (5 m optional) shielded cable with

pin connections onto controller circuit board.

• Power Supply: 115 VAC to 12 VDC power

transformer directly into controller circuit board.
Comes with a wall plug and cord. Adaptor may be
required to fit local power socket.

COLORS

Plastic fascia is available in:

- White (Standard)

PACKING

• Supplied in cardboard box which includes con-

troller circuit board, face plate, sensor and power
transformer. Surface box mounting optional.

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Laboratory Airflow Monitors & Controls

TYPE C STANDARD & NIGHT SETBACK

LED & DIGITAL - VAV SYSTEM

Operating Principle

When the fume extraction fan is running, it causes negative pressure inside
the fume cupboard. If the sash is lowered, the negative pressure become more
intense causing air to be drawn through the sash opening at an increased velocity.
Conversely, if the sash is raised the negative pressure becomes less intense and air
velocity reduces.

If an opening is made in the wall of the fume cupboard, air will enter it at a
velocity determined by the same negative pressure that is drawing air into the
sash opening. By sensing the air velocity through an opening, we can determine
its level at the sash opening.

PLASTEC
or thermal anemometer into a hole in the cupboard and sending the air velocity
measurement obtained to a display on the fascia panel. Based on air velocity
measured, Plastec
or decrease fan speed.

The air velocity level is displayed on the fascia either by LED illumination or
digital read-out. An audible alarm will also sound if the air velocity is too low.

®

AirControl Type C exploits this by the placing of a numerical sensor,

®

AirControl C will send a signal to an inverter to either increase

SENSOR

Airflow Monitor

www.plastecvent.net

2216 60th Drive East • Bradenton, Florida 34203

[phone] • Fax [phone] • www.plastecvent.net

3

Controller

Sensor

Laboratory Airflow Monitors & Controls

TYPE C STANDARD

LED & DIGITAL - VAV SYSTEM

Schematic AirControl C LED & Digital

Inverter System

115 VAC /12 VDC
Power Supply

Hood Light
on/off relay

Sensor

Signal Input

Air Make-up
on/off relay

Sash High Alarm Input

0 to 10V or 4-20mA

OR

Motorized

Damper

Sash movement

=

Pressure decrease

or increase

OUTPUT:

0 to 10V

or

4-20mA

Air speed

monitoring & control

!

If air speed is low

Fan on/off
relay

Frequency Inverter

230V – 1Ph input

Make-up

Fan

Frequency

Inverter

230V – 3Ph

Plastec® Extraction

Fan: Speed increase

or decrease

2216 60th Drive East • Bradenton, Florida 34203

[phone] • Fax [phone] • www.plastecvent.net

4

Laboratory Airflow Monitors & Controls

TYPE C NIGHT SETBACK

LED & DIGITAL - VAV SYSTEM

Schematic AirControl C Night Setback

115 VAC /12 VDC
Power Supply

Controller

Sensor

Sensor

Signal Input

Hood Light
on/off contact

Sash movement

=

Pressure decrease

or increase

Sash High Alarm Input

Night Setback relay

OUTPUT

Air speed

monitoring & control

!

If airflow is low

2216 60th Drive East • Bradenton, Florida 34203

[phone] • Fax [phone] • www.plastecvent.net

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