©Copyright Task Force Tips LLC 2012-2019
LIB-065 August 30, 2019 Rev 01
8
4.0 PATTERN AND FLUSH CONTROL
4.1 PATTERN CONTROL
TFT’s nozzles have full pattern control from straight stream to wide fog. The pattern can be adjusted using the linear actuator either
by electronic control or by twisting the KNOB in either direction. The STREAM SHAPER moving forward transitions the STREAM
SHAPER to the straight stream position. The STREAM SHAPER moving rearward results in an increasingly wider stream pattern.
Since the stream trim point varies with fl ow, the stream should be “trimmed” after changing the fl ow to obtain the straightest and
farthest reaching stream. To properly trim a stream, fi rst open the pattern to a narrow fog. Then close the stream to parallel to give
maximum reach.
Note: Moving the shaper further forward will cause stream crossover and reduce the eff ective reach of the nozzle.
4.2 FLUSH CONTROL
WARNING
Large amounts of debris may be unfl ushable and can reduce the fl ow of the nozzle resulting in an
ineff ective fl ow. In the event of a blockage, it may be necessary to retreat to a safe area.
Debris may become trapped in the nozzle causing poor stream quality, shortened reach and reduced fl ow. To remove trapped debris
the nozzle can be fl ushed as follows: while still fl owing water, move the STREAM SHAPER rearward past the full fog position until it
stops traveling.* This opens the nozzle allowing debris to pass through. Move the SHAPER forward and out of the fl ush position to
continue normal operation. During fl ush, the nozzle reaction decreases as the pattern becomes wider and the pressure drops. The
nozzle reaction increases when returning the nozzle from the fl ush position.
*When used with a TFT RC Monitor equipped with Smart Stream technology, the Fog button must be pressed and held
a second time to reach the Flush position, after having reached Full Fog. The purpose of the Smart Stream feature is to
prevent unintentional fl ushing of the nozzle, which will reduce reach and increase the fl ow rate, potentially depleting the
water supply more quickly.
SMART STREAM (-ERP models)
NOZZLE STOPS AT FULL FOG
PRESS AGAIN FOR FLUSH
PRESS AND HOLD
FOR STRAIGHT STREAM
PRESS AND HOLD
FOR FOG, THEN FLUSH
FOG
STRAIGHT
STREAM
Fog and Straight Stream Buttons
Are Located on TFT Control Unit
View TFT Manual LIY-500
for your specific control unit.
Figure 4.2.2
5.0 FIRE GROUND USE
IT IS THE RESPONSIBILITY OF THE INDIVIDUAL FIRE DEPARTMENT OR AGENCY TO DETERMINE PHYSICAL CAPABILITIES
AND SUITABILITY FOR AN INDIVIDUAL’S USE OF THIS EQUIPMENT.
Many factors contribute to the extinguishment of a fi re. Among the most important is delivering water at a fl ow rate suffi cient to absorb
heat faster than it is being generated. The fl ow rate depends largely on the pump discharge pressure and hose friction loss. The
pump discharge pressure may be calculated using a hydraulic equation such as:
For additional information on calculating specifi c hose layouts,
consult an appropriate fi re service training manual, A Guide to
Automatic Nozzles, or call TFT’s “Hydraulics Hotline” at 800-
348-2686.
PDP = NP+FL+DL+EL
PDP = Pump discharge pressure in PSI
NP = Nozzle pressure in PSI
FL = Hose friction loss in PSI
DL = Device loss in PSI
EL = Elevation loss in PSI
