Printed in Canada TAC1000 Manual June 19, 2013 Page 2
1.4.2 FAN BLADE TIP SPEED
WARNING: The fan system must not exceed a blade tip
speed of 20,000 feet/minute. Exceeding this speed may
cause damage to and/or failure of the fan, which in turn
may cause injury or death, or less importantly, damage to
the radiator and surrounding equipment.
To calculate the blade tip speed, use the following formula:
Fan Diameter (Inches) X 3.14 X Fan RPM
12
If your calculated tip speed exceeds 20,000 ft/min, contact
Flexxaire directly, prior to installation. It is important to
use Fan RPM and NOT engine RPM.
1.5 FAN OVERVIEW
Flexxaire’s TAC1000 fan systems are designed to minimize
overheating caused by debris plugged radiators, screens
and guards, and reduce overcooling in low ambient temperatures. The blades of the TAC1000 vary pitch, not
speed, to control air flow and direction.
How your TAC1000 works:
The TAC1000-P is a pneumatically actuated variable pitch
fan. The TAC1000-H is a hydraulically actuated variable
pitch fan. The blades are held in full pitch by a heavy
spring. As pneumatic (or hydraulic) pressure is applied to
the control line, the pitch of the blade is reduced and then
reversed. When the pressure is released, the fan blades
return to their default position (See below). The TAC1000
has a number of inherent features:
1. Fail Safe Operation: The blades are spring loaded into
the default full pitch position. If the fan loses pressure, the
fan will default to full pitch and act like a fixed pitch fan
giving maximum cooling.
2. Depending on the control kit ordered (see section 2.0),
the fan can be run in a neutral pitch (or any pitch in between) to solve overcooling problems and save horsepower
and fuel.
When purging, there are no horsepower spikes in fact the
horsepower drops off as you pass through neutral pitch,
then slowly builds as pitch increases.
2.0 CONTROL KITS
Due to the variability of machines that the TAC1000 fan
may be installed on, the fan does not include any control
components. All of Control Kits are available in 12V and
24V configurations. Contact Flexxaire or your dealer for
availability.
Flexxaire has a number of different control kits available to
suit a wide range of applications:
2.0.1 PNEUMATIC CONTROL:
-2 Position kit (Manual Purge)
-2 Position kit with timer (Manual and Auto Purge)
-Infinitely Variable Pitch Controller (IVP fan control)
-Each kit is available with or without an air compressor.
2.0.2 HYDRAULIC CONTROL:
-2 Position kit (Manual Purge)
-2 Position kit with timer (Manual and Auto Purge)
-Infinitely Variable Pitch Controller (IVP fan control)