8VORTEK Doc.# VT5 OM 050499, Rel. 2.1
1.5 Options
Many users prefer to have a digital display as a part of the transmitter. This type
of display is available as an option with the VorTek transmitter. A 3-1/2 digit dis-
play is available allowing a display of 0 to 1999 in either CFM or FPM, which is
specified by the customer at the time of purchase. Multipliers of either x10 or
x100 can be used to display up to 200,000 CFM.
2.0 INSTALLATION
The VorTek measurement system consists of two basic elements: the probes and
the transmitter. The VorTek probe bars are inserted into the duct and measure
the velocity of the air moving through the duct. The VorTek transmitter, which is
mounted in close proximity to the probes, converts the electronic pulses gener-
ated by the probes into an electronic signal compatible with most DDC control
systems.
The following details are provided on the mounting and installation of the VorTek
transmitter and flow probes. Please read this data carefully and install the equip-
ment in strict accordance with the instructions provided. Should you have any
questions, contact Tek-Air directly.
2.1 Probe Mounting and Location
2.1.1 Duct- Mounted Probes
(refer to drawings on pages A-2 thru A-4 of Appendix A)
General- VorTek probe bars are designed for installation in ducts, regardless of
the duct size. Usually, the larger the duct, the more sensing points are required to
provide an accurate measurement of airflow volume. In a typical application,
multiple probe support bars are directly inserted in the duct. Each probe bar has
multiple VorTek sensors for measurement of the air velocity in the area of the
duct it serves.
Turbulent Airflow- Probe design allows for installation in ductwork without the
requirement for special air straighteners. However, care should be taken to avoid
installation within close proximity to:
• Balancing dampers
• Modulating opposed blade dampers
• Non-airfoil type, parallel-blade dampers
• Elbows
• Transitions
• Humidifiers
• Coils
Refer to the drawing “Minimum Installation Requirements”, Appendix A, page A-1
for the
minimum acceptable installation criteria for specific applications. If more
space is available, probe bars should be located so that they have two thirds of
the straight duct length upstream of the probe bars. Keep in mind that locations
other than those specified as minimums often have areas with very high turbu-
Chapter 2 Installation
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