TFT FLEX Series Programming manual

©Copyright Task Force Tips LLC 2023 1 LIY-220 August 21, 2023 Rev00
TASK FORCE TIPS LLC
MADE IN USA · tft.com
3701 Innovation Way, Valparaiso, IN 46383-9327 USA
800-348-2686 · 219-462-6161 · Fax [phone]
G-Force
INSTRUCTION FOR INSTALLATION, OPERATION, AND MAINTENANCE
FLEX™ MONITOR
SERIES
DANGER
Understand manual before use. Operation of this device without understanding the manual and
receiving proper training is a misuse of this equipment. Obtain safety information at tft.com/
serial-number.
This equipment is intended for use by trained and qualified emergency services personnel for
firefighting. All personnel using this equipment shall have completed a course of education
approved by the Authority Having Jurisdiction (AHJ).
This instruction manual is intended to familiarize firefighters and maintenance personnel with the
operation, servicing, and safety procedures associated with this product. This manual should be
kept available to all operating and maintenance personnel.
(see section 3.2) for Flow/Pressure Operations Envelope
FLEX
WITH TILLER
FLEX
WITH CRANK
FLEX RC

©Copyright Task Force Tips LLC 2023 2 LIY-220 August 21, 2023 Rev00
The member companies of FEMSA that provide emergency
response equipment and services want responders to know and
understand the following:
1. Firefighting and Emergency Response are inherently
dangerous activities requiring proper training in their hazards
and the use of extreme caution at all times.
2. IT IS YOUR RESPONSIBILITY to read and understand
any user’s instructions, including purpose and limitations,
provided with any piece of equipment you may be called on
to use.
3. IT IS YOUR RESPONSIBILITY to know that you have been
properly trained in Firefighting and/or Emergency Response
and in the use, precautions, and care of any equipment you
may be called upon to use.
4. IT IS YOUR RESPONSIBILITY to be in proper physical
condition and to maintain the personal skill level required to
operate any equipment you may be called upon to use.
5. IT IS YOUR RESPONSIBILITY to know that your equipment is
in operable condition and has been maintained in accordance
with the manufacturer’s instructions.
6. Failure to follow these guidelines may result in death, burns or
other severe injury.
Fire and Emergency Manufacturers and Service Association, Inc.
PO Box 147, Lynnfield, MA 01940 • www.FEMSA.org
© 2020 FEMSA. All Rights Reserved.
PERSONAL RESPONSIBILITY CODE
DANGER

©Copyright Task Force Tips LLC 2023 3 LIY-220 August 21, 2023 Rev00
TABLE OF CONTENTS
1.0 MEANING OF SAFETY SIGNAL WORDS
2.0 SAFETY
3.0 GENERAL INFORMATION
3.1 MECHANICAL SPECIFICATIONS
3.2 OPERATING ENVELOPE
3.3 USE WITH SALT WATER
3.4 VARIOUS MODELS AND TERMS
3.5 INLETS AND OUTLETS
3.5.1 OUTLET ADAPTER
3.6 OVERALL DIMENSIONS
4.0 INSTALLATION
4.1 ELECTRICAL INSTALLATION
4.2 STRUCTURAL REQUIREMENTS
4.3 TWO-PIECE ROTATIONAL LOCK INSTALLATION
4.4 CABLE ROUTING FOR EXTEND-A-GUN
4.5 FLEX INSTALLATION ON VUM
4.6 HORIZONTAL ROTATION TRAVEL STOPS
4.7 INSTALLING THE HORIZONTAL TRAVEL STOPS
4.8 ELEVATION TRAVEL STOPS
4.9 NOZZLE INSTALLATION
4.10 PRESSURE GAUGE PORT
4.11 TILLER HANDLE INSTALLATION
4.12 DRAINING RESIDUAL WATER
5.0 OPERATING INSTRUCTIONS
5.1 HANDWHEEL HORIZONTAL ROTATIONAL CONTROL
5.2 HANDWHEEL ELEVATION CONTROL
5.3 TILLER BAR CONTROL
5.4 RECOMMENDED PARK POSITION
5.5 OVERRIDE KNOBS
6.0 FLOW CHARACTERISTICS
6.1 YST-4NN STACKED TIPS FLOW AND REACH
6.2 MST-4NJ STACKED TIPS FLOW AND REACH
6.3 EFFECTS OF ELEVATION AND WIND ON STREAM REACH
6.4 AUTOMATIC MASTERSTREAM NOZZLES
6.5 FRICTION LOSS
6.6 STREAM STRAIGHTENERS
6.6.1 STREAM STRAIGHTENERS WITH STACKED TIPS
6.6.2 STREAM STRAIGHTENERS WITH FOG NOZZLES
7.0 WARRANTY
8.0 MAINTENANCE
8.1 SERVICE TESTING
8.2 LUBRICATION
8.3 TROUBLESHOOTING
8.4 REPAIR
9.0 EXPLODED VIEWS AND PARTS LISTS
10.0 OPERATION AND INSPECTION CHECKLIST

©Copyright Task Force Tips LLC 2023 4 LIY-220 August 21, 2023 Rev00
1.0 MEANING OF SAFETY SIGNAL WORDS
A safety related message is identified by a safety alert symbol and a signal word to indicate the level of risk involved with a particular
hazard. Per ANSI Z535.6, the definitions of the four signal words are as follows:
2.0 SAFETY
DANGER
DANGER indicates a hazardous situation which, if not avoided, will result in death or serious injury.
WARNING
WARNING indicates a hazardous situation which, if not avoided, could result in death or serious
injury.
CAUTION CAUTION indicates a potentially hazardous situation which, if not avoided, could result in minor
or moderate injury.
NOTICE
NOTICE is used to address practices not related to physical injury.
DANGER
An inadequate supply of pressure and/or flow will cause an ineffective stream and can result
in injury or death. Choose operating conditions to deliver adequate fire suppression. See flow
graphs.
WARNING
Injury or damage can occur from an inadequately supported monitor. The mounting must be
capable of supporting the nozzle reaction force which can be as high as 1500 lbs.
WARNING
The stream exiting a nozzle is very powerful and capable of causing injury and property damage.
Make sure the nozzle is securely attached and pointing in a safe direction before water is turned on.
Do not direct water stream to cause injury or damage to persons or property.
WARNING
Equipment may be damaged if frozen while containing significant amounts of water. Such damage
may be difficult to detect visually. Subsequent pressurization can lead to injury or death. Any time
the equipment is subject to possible damage due to freezing, it must be tested and approved for
use by qualified personnel before being considered safe for use.
WARNING
On many vehicle installations, the monitor is the highest point on the apparatus. Damage or injury
could occur if there is not sufficient clearance to safely pass under doors or overhead obstructions.
Always check stowed position of the monitor before moving.
CAUTION The electric drives are current limited but may still produce enough force to cause injury. To avoid
injury from moving equipment:
• Be aware that equipment may be remotely operated
• Keep hands and fingers away from pinch points
• Never operate the manual override while electric controls are in operation

©Copyright Task Force Tips LLC 2023 5 LIY-220 August 21, 2023 Rev00
3.0 GENERAL INFORMATION
FLEX is a mounted master stream monitor/ water cannon with flow ranges from 1250 GPM (4750 LPM) to 2000 GPM (7600 LPM).
The unique design minimizes curves in the waterway, lowering friction loss, resulting in a higher-quality, further reaching water stream.
Paired with the FLEX Ops app, the monitor is customizable and simple to install and program.
3.1 MECHANICAL SPECIFICATIONS
.0
Table 3.1
MANUAL ELECTRIC
US METRIC US METRIC
Weight* 33 to 39 lbs 15 to 18 kg 42 to 47 lbs 19 to 21 kg
Minimum Flow Area (4” Inlet x 3.5” Outlet) 9.6 in261.9 cm29.6 in261.9 cm2
Minimum Flow Area (3” Inlet x 2.5” Outlet) 4.9 in231.6 cm24.9 in231.6 cm2
Maximum Operating Pressure 200 psi 14 bar 200 psi 14 bar
Nominal Operating Voltage n/a n/a 12 or 24 VDC (auto sense)
Maximum Voltage n/a n/a 32 VDC
Operating Temperature Range of Fluid 33°F to 120°F / 1°C to 50°C
Storage Temperature Range -40 to 150°F / -40 to 65°C
Maximum Torque (Elevation)
n/a
80 ft-lbs 110 N·m
Maximum Torque (Horizontal) 60 ft-lbs 80 N·m
Speed (Elevation) 6 deg/sec
Speed (Horizontal) 12 deg/sec
Speed at Maximum Load (Elevation) 5 deg/sec
Speed at Maximum Load (Horizontal) 10 deg/sec
Materials ANSI A356.0-T6 Aluminum, Stainless, Nylon
* Weight varies by model, see website listing for specific model weight.

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3.2 OPERATING ENVELOPE
Figure 3.2A
Figure 3.2B
WARNING
Damage or injury could result from operating the monitor beyond the safe operating envelope. Do
not operate the monitor outside the envelope in the following graph(s).
Monitor Inlet Pressure (bar)
3.5” FLEX Monitor Operating Envelope
0 1000 2000 3000 4000 5000 6000
0
2
4
6
8
10
12
14
16
0
25
50
75
100
125
150
175
200
225
250
0 200 400 600 800 1000 1200 1400 1600
Flow (lpm)
Monitor Inlet Pressure (bar)
Monitor Inlet Pressure (psi)
Flow (gpm)
Nozzle A
Inlet Pressure
Nozzle B
Inlet Pressure Nozzle C
Inlet Pressure
Maximum Monitor
Inlet Pressure
Maximum Nozzle
Inlet Pressure
Nozzle A Ňows 500 gpm (1900 lpm) at 100 psi (6.9 bar), K factor = 50
Nozzle B Ňows 1000 gpm (3800 lpm) at 100 psi (6.9 bar), K factor = 100
Nozzle C Ňows 1500 gpm (5700 lpm) at 100 psi (6.9 bar), K factor = 150
Monitor Loss
2.5” FLEX Monitor Operating Envelope

©Copyright Task Force Tips LLC 2023 7 LIY-220 August 21, 2023 Rev00
3.3 USE WITH SALT WATER
Use with salt water is permissible provided the equipment is thoroughly cleaned with fresh water after each use. The service life of the
equipment may be shortened due to the effects of corrosion, and is not covered under warranty.
3.4 VARIOUS MODELS AND TERMS
rm model has a smaller swing radius and has horizontal travel stops factory installed at 90° left and right (180° total).trol
Figure 3.4A
Manual Model with Crank
Figure 3.4B
Manual Model with Tiller
OUTLET
HORIZONTAL
ROTATION
HANDCRANK
ELEVATION
HANDCRANK
HORIZONTAL ROTATION
TRAVEL STOPS
PORT FOR
PRESSURE GAGE
INLET
GEARBOX WITH
VERTICAL STOPS
VERTICAL
LOCKING
KNOB
HORIZONTAL
LOCKING
KNOB
TILLER HANDLE

©Copyright Task Force Tips LLC 2023 8 LIY-220 August 21, 2023 Rev00
Figure 3.4C
RC Model
3.5 INLETS AND OUTLETS
There is a wide variety of inlet and outlet options for the FLEX monitor. The overall height and weight of the monitor may differ slightly
based on the inlet and outlet configuration. See finished good drawing on the website listing for specific model dimensions.
3.5.1 OUTLET ADAPTER
FLEX monitors with 2.5" threaded outlets may easily converted to 3.5"NH threads by tightening four screws surrounding the outlet, then
unscrewing the 2.5" threaded outlet and O-ring using a strap wrench.
MANUAL OVERRIDE KNOB
FOR ELEVATION
MANUAL OVERRIDE KNOB
FOR HORIZONTAL ROTATION
ELEVATION GEAR MOTOR
HORIZONTAL ROTATION
GEAR MOTOR

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3.6 OVERALL DIMENSIONS
Figure 3.6A
Manual Model with Crank
(Shown with 4” ANSI 150 inlet, see finished good drawing on the website for specific model dimensions)
Figure 3.6B
RC Model
(Shown with 4” ANSI 150 inlet, see finished good drawing on the website for specific model dimensions)
14.86"
[377 mm]
18.38"
[467 mm]
7.93"
[201 mm]
10.45"
[265 mm]
11.94"
[303 mm]
45°
90°
4.31"
[109 mm]
6.11"
[155 mm]
10.42"
[265 mm]
8.45"
[215 mm]
SWING
360°
CONTINUOUS
16.66"
[423 mm]
5.05"
[128 mm]
10.45"
[265 mm]
15.50"
[394 mm]
45°
120°
10.55"
[268 mm]
4.55"
[116 mm]
6.00"
[153 mm]
6.00"
[153 mm]
SWING
225°
RIGHT
225°
LEFT

©Copyright Task Force Tips LLC 2023 10 LIY-220 August 21, 2023 Rev00
Figure 3.6C
Manual Model with Tiller
(Shown with 4” ANSI 150 inlet, see finished good drawing on the website for specific model dimensions)
17.30"
[439 mm]
15.70"
[399 mm]
45°
120°
11.94"
[303 mm]
6.85"
[174 mm]
10.45"
[265 mm]
9.24"
[235 mm]
4.59"
[117 mm]
13.83"
[351 mm]
10.137"
[257 mm]
SWING
360°
CONTINUOUS

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4.0 INSTALLATION
4.1 ELECTRICAL INSTALLATION
See Remote Control (RC) Monitor Electrical Controls Supplemental Instructions LIY-550.
4.2 STRUCTURAL REQUIREMENTS
The structure that the monitor is mounted to must withstand the internal
pressure of the monitor as well as shear and bending forces due to nozzle
reaction. Nozzle reaction can be as high as 1500 lbs (700 kg)(2000 gpm at
200 psi).
For flanged connections, the use of flat flanges without raised faces is
recommended. Use a ring gasket as defined in ASME 16.21 or ISO 7483.
Tighten flange bolts in an alternating sequence as shown below. Tighten
sequentially each bolt or stud three times to 30%, then 60%, and finally
100% of the specified torque. Tighten to a total of 76-80 ft-lb (100-110 N·m).
Table 4.2
4.3 TWO-PIECE ROTATIONAL LOCK INSTALLATION
WARNING
Reaction forces generated by master stream flows are capable of causing injury and property
damage if not properly supported. Monitors should be securely installed by qualified individuals.
• Mounting objects must be capable of withstanding maximum nozzle reaction force.
• The monitor must be securely mounted to rigid support members.
• Do not use flanges or pipe made from plastic for monitor mounting.
• Torque all fasteners to specified values.
FLANGE TYPE OPTION # OUTSIDE
DIAMETER
THICKNESS BOLT HOLE
CIRCLE
# OF
BOLTS
SIZE OF
BOLTS
in mm in mm in mm in mm
3” ANSI 125/150-DN80 PN20 1 7.5 190 0.75 20 6.0 152.5 4 5/8 16
4” ANSI 150-DN100 PN20 2 9.0 230 0.94 23 7.5 190 8 5/8 16
6” ANSI 150 Flange 3 10.9 277 1.0 25.4 9.5 241.3 8 5/8 16
DN80, PN16 Flange 4 7.9 200 0.87 22 6.3 160 8 5/8 16
DN100, PN16 Flange 5 8.7 220 0.87 22 7.1 180 8 5/8 16
1
3
2
4
1
5
3
7
2
6
4
8
Tighten Sequentially Each Bolt Three Times
to a Total of 76-80 ft-lb (100-110 N·m)

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Figure 4.3A
Figure 4.3B
Y4437
VW360x200-04
Y4435
VT10-32SH1.2
Apply Loctite 242 (blue) to threads on both
Cylinder Nuts.
MONITOR BASE CLAMP
WASHER
SOCKET HEAD SCREW
10-32 X 1-1/4 LONG
CYLINDER NUT
BLUE LOCTITE
BLUE LOCTITE
STEP 1
CYLINDER NUT
HEAD GROOVE
TOP SIDE OF CLAMP
Align grooves in heads of Cylinder Nuts with top
sides of Clamps.
Slide Screws through Washers and Clamps.
Loosely thread Screws into Cylinder Nuts.
STEP 2
EXTEND-A-GUN
MALE OUTLET
THREADS
TOP SIDE
OF CLAMPS
LOOSE CLAMP
ASSEMBLY
CYLINDER
NUT HEAD
Place Clamp assembly over male threads of
outlet.
Cylinder Nut heads MUST be on top side of
Clamps.
STEP 3

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Figure 4.3C
Figure 4.3D
Figure 4.3E
Screw monitor onto Extend-A-Gun until monitor
base bottoms out against Extend-A-Gun outlet.
Threaded joint seals with an O-ring and will leak if
monitor base bottoms out on Clamp assembly
instead of Extend-A-Gun outlet.
Do not use pipe dope or Loctite on threads. Use
of thread locking compounds is unecessary and
will make removal difficult.
STEP 4
EXTEND-A-GUN
OUTLET
MISALIGNED "STRAIGHT
AHEAD REFERENCE MARK"
MONITOR INLET
LOOSE CLAMP
ASSEMBLY
Unscrew monitor base from Extend-A-Gun outlet
until "Straight Ahead Reference Mark" is facing
desired direction. *
Monitor may be unscrewed up to one full rotation
from bottomed-out condition. Monitor will leak if
unthreaded more than one rotation (360°) from
bottomed-out condition.
STEP 5
ALIGNED
"STRAIGHT AHEAD
REFERENCE MARK”
EQUAL SPACING
ALTERNATE BOLTS
WITH EACH HALF TURN
TIGTHEN ONE TURN
PAST FINGER TIGHT
Rotate clamps to desired position and tighten
Screws until finger tight. Maintain equal spacing
between Clamp ends.
Tighten Screws one additional turn using a 5/32"
(4mm) hex wrench. Alternate Screws each
half-turn.
To avoid damage to the monitor, ensure Clamps
do not interefere with RC monitor Power/Com
cable and that Screws are not overtightened.
STEP 6

©Copyright Task Force Tips LLC 2023 14 LIY-220 August 21, 2023 Rev00
4.4 CABLE ROUTING FOR EXTEND-A-GUN
When using a FLEX monitor on an Extend-A-GUN RC, route the cable as shown in the image below. Use the wire clamp provided on the
Extend-A-Gun RC to secure the wire to the Extend-A-Gun gearbox.
Figure 4.4
Extend-A-Gun Cable Routing
The Extend-A-Gun manual override knob may be mounted in any of four possible orientations (90 degrees apart) relative to the Straight
Ahead Reference Mark on the monitor.
4.5 FLEX INSTALLATION ON VUM
Due to the many possible VUM configurations, when installing FLEX on a VUM, select VUM model configurations may have interference
with a FLEX monitor. In these cases, it is recommend to use the extension piece provided with FLEX Code-RPF Inlet Models. This
extension will raise the height of the monitor by 1.5".
NOTE:
CORRECT
WIRE WRAP
WIRE WRAPPED
CORRECT
MANUAL OVERRIDE
KNOB ON
EXTEND-A-GUN
WIRE WRAPPED
INCORRECT
NOTE:
WIRE NOT
WRAPPED

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4.6 HORIZONTAL ROTATION TRAVEL STOPS
The range of horizontal rotation travel for the manual FLEX monitor is continuous 360 degrees. The motorized version is limited to 450
degrees total horizontal rotation travel, or 225 degrees from either side of a straight ahead position. Horizontal rotation travel stops may
be installed at any position on the monitor to limit travel. Note that left and right are relative to the “Straight Ahead Reference Mark” and
refer to the nozzle’s discharge direction as seen from an operator’s position behind the nozzle.
Figure 4.6A
Horizontal Rotation Travel Limits for RC Models
Figure 4.6B
Horizontal Rotation Travel Stops
4.7 INSTALLING THE HORIZONTAL TRAVEL STOPS
To install the Horizontal Travel Stops:
1. Align the monitor discharge with the Straight Ahead Reference Mark.
2. When facing the back of the monitor, the travel stop marked “L” must be installed on the left-hand side, and the travel stop marked
“R” must be installed on the right-hand side.
3. Hold the travel stop with the letter (L or R) facing up, rotate the travel stop 90° and insert into the coupling track.
4. Rotate back to the original position with the letter facing up.
5. Move the monitor to the desired end of travel and slide the travel stop against the stop ear on the monitor. To aid setting the travel
stops at left/right angles of exactly 45, 90 or 135°, the stop positions can be set by aligning the "L" or "R" marking with one of the
shallow notches located just above the travel stop track.
6. Apply Loctite® 242 (blue) to the screw threads and tighten set screws to lock the travel stop position.
7. Repeat for the other side.
225°
RIGHT
225°
LEFT
LOCATION OF
STRAIGHT AHEAD
REFERENCE MARK
RC MODELS WITH NO TRAVEL STOPS
INSTALLED HAVE A HORIZONTAL
ROTATIONAL TRAVEL LIMIT OF
225° LEFT AND RIGHT OF THE
STRAIGHT AHEAD REFERENCE MARK
MANUAL MODELS WITH NO TRAVEL STOPS
INSTALLED HAVE A CONTINUOUS
360° HORIZONTAL ROTATIONAL TRAVEL
SET
SCREWS
RIGHT
TRAVEL
STOP
TRAVEL
STOP
TRACK
STOP
EAR
"STRAIGHT
AHEAD
REFERENCE
MARK" is located
behind the
monitor hub

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4.8 ELEVATION TRAVEL STOPS
The range of elevation travel for the FLEX Monitor is 30 degrees past vertical to 45 degrees below horizontal. The elevation range may
be limited by installing the supplied stop bolts at the locations as shown. The figures include installation notes.
Figure 4.8A
Elevation Travel Limits
Figure 4.8B
Elevation Travel Stop Locations
45°
BELOW
45°
ABOVE
15°
BELOW
60°
ABOVE
20°
PAST VERTICAL
30°
PAST VERTICAL
90°
ABOVE
HORIZONTAL
Stop Bolt Installation Instructions:
2. Remove cover plate.
3. Remove set screws.
4. Apply Loctite 242 (blue) to the stop bolts.
Install stop bolts to obtain desired travel limits.
Elevation travel with no stop bolts is 30 degrees
past vertical and 45 degrees below horizontal.
4. Install Cover plate.
5. Apply Loctite 242 (blue) to the button head
screw threads and tighten screws to secure cover plate.
Remove 3 button head screws.
1.
STOP BOLT
COVER
ELEVATION
STOP INDICATOR

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4.9 NOZZLE INSTALLATION
The nozzle is simply screwed onto the monitor’s exit threads. If the nozzle is installed on a FLEX RC (with electric motors) assure that
the nozzle’s actuator does not make contact with the horizontal drive chain and motor housings when the monitor is in it’s lowest
elevation position.
4.10 PRESSURE GAUGE PORT
There is a ¼” NPT female threaded hole on the back of the monitor. The hole is plugged from the factory. If a pressure gauge is desired,
unscrew the plug and install the gage using pipe sealant. Make sure the gauge does not interfere with operation.
4.11 TILLER HANDLE INSTALLATION
For tiller models, the handle is shipped loose from the monitor and must be installed to complete the installation process. When installing
the tiller handle (see Figure 5.3), be sure to coat the threads of the mounting screw with the Loctite supplied in the hardware packet.
4.12 DRAINING RESIDUAL WATER
There is no drain on the FLEX monitor itself. A drain valve should be installed on the piping to which the monitor is attached.
CAUTION Mismatched or damaged waterway connections may cause equipment to leak or uncouple under
pressure. Failure could result in injury. Equipment must be mated to matched connections.
CAUTION Dissimilar metals coupled together can cause galvanic corrosion that can result in the inability to
uncouple the connection, or complete loss of engagement over time. Failure could cause injury. Per
NFPA 1962, if dissimilar metals are left coupled together, an anti-corrosive lubricant should be
applied to the connection and the coupling should be disconnected and inspected at least
quarterly.
WARNING
Monitors, valves, and piping may be damaged if frozen while containing sufficient amounts of
water. Such damage may be difficult to detect visually and can lead to possible damage, injury, or
death. Equipment that may be exposed to freezing conditions must be drained immediately
following use to prevent damage.
CAUTION Structural damage from corrosion can result from failure to drain appliance between uses. Damage
from corrosion can cause injury due to equipment failure. Always drain appliance between uses.

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5.0 OPERATING INSTRUCTIONS
See Remote Control (RC) Monitor Electrical Controls Supplemental Instructions LIY-550 for operation of the FLEX RC Monitors.
5.1 HANDWHEEL HORIZONTAL ROTATIONAL CONTROL
A handwheel controls the monitor’s horizontal rotation direction. Counterclockwise rotation of the handwheel moves the nozzle to the left
and clockwise rotation to the right. Approximately 14 turns of the handwheel will give a 90 degree change in horizontal rotation direction.
5.2 HANDWHEEL ELEVATION CONTROL
A handwheel controls the monitor’s elevation direction. Clockwise rotation of the handwheel lowers the elevation and counterclockwise
raises it. About 60 turns of the handwheel will give the complete 165 degree elevation travel range of the monitor.
5.3 TILLER BAR CONTROL
On the Tiller Bar model, the horizontal and vertical rotation is changed by pushing or pulling horizontally on the Tiller Handle. Twisting the
Rotation Locking Knob clockwise will increase the drag on the lower swivel joint to “lock” the monitor in a particular direction.
Figure 5.3
5.4 RECOMMENDED PARK POSITION
For truck mounted applications, it is recommended that the monitor be parked in a position such that the monitor’s nozzle rests against
a bracket or support surface. If a support surface is not available, run the elevation against one of the travel stops to take some of the
backlash out of the gear drive. This will minimize bouncing of the nozzle when the apparatus is traveling. Always be sure the monitor is
properly parked before moving the truck and know the overall height to avoid damage from overhead obstructions such as doors or
bridges. See LIY-550 for information on programming PARK position.
5.5 OVERRIDE KNOBS
In the event of electrical system failure on the monitor or fire truck, the FLEX RC may be manually operated with factory supplied
override knobs. To make the FLEX RC more compact, the manual override knobs may be removed. Removing the override knobs
exposes a hex so an 11/16” wrench or socket may be used for manual override.
WARNING
Debris in the nozzle may cause off center nozzle reaction. Injury or damage from spinning or
sudden movement of the monitor could occur. To reduce the risk of an out of control monitor:
• Always check for waterway obstructions before flowing water
• Always keep the rotation lock tight when not rotating the monitor
• Always keep one hand on the tiller handle when loosening the rotation lock
• When 360° rotation is not needed, install horizontal rotation stop bolts to limit monitor travel
VERTICAL
ROTATION
LOCK
APPLY FORCE
HERE TO CHANGE
VERTICAL ELEVATION
APPLY FORCE
HERE TO CHANGE
HORIZONTAL
ROTATION
HORIZONTAL
ROTATION
LOCK

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6.0 FLOW CHARACTERISTICS
6.1 YST-4NN STACKED TIPS FLOW AND REACH
Figure 6.1A
Stacked Tip Model YST-4NN
Table 6.1
YST-4NN Flow and Reaction Force
NOZZLE INLET PRESSURE
NOZZLE
DIAMETER
50 PSI 60 PSI 80 PSI 100 PSI
FLOW
(GPM)
REACTION
(LBS)
FLOW
(GPM)
REACTION
(LBS)
FLOW
(GPM)
REACTION
(LBS)
FLOW
(GPM)
REACTION
(LBS)
2.00” 840 310 920 380 1060 500 1190 630
2.25” 1080 400 1170 480 1350 640 1500 790
2.50” 1310 490 1440 590 1660 785 1860 980
2.75” 1590 590 1740 710 2010 950 --- ---
NOZZLE INLET PRESSURE
NOZZLE
DIAMETER
3.5 BAR 4.1 BAR 5.5 BAR 7 BAR
FLOW
(L/min)
REACTION
(KG)
FLOW
(L/min)
REACTION
(KG)
FLOW
(L/min)
REACTION
(KG)
FLOW
(L/min)
REACTION
(KG)
50 mm 3180 140 3480 170 4010 230 4500 290
57 mm 4010 180 4430 220 5110 290 5680 360
64 mm 4960 220 5450 270 4680 360 7040 450
70 mm 6020 270 6590 320 7610 430 --- ---
--- FLOW EXCEEDS RATING OF FLEX MONITOR
3.5-6 NH
Remove cap and install
smaller tips if desired.
Such as Model #MST-4NJ
(1-3/8", 1-1/2", 1-3/4", 2")
Integral Stream 2-3/4" 2-1/2" 2-1/4" 2" Protective Cap
Straightener
Figure 6.1B
YST-4NN Flow Graph
0
2
12
10
8
6
4
PRESSURE (BAR)
0
20
40
60
80
100
120
140
160
180
200
0 200 400 600 800 1000 1200 1400 1600 1800 2000
FLOW (GPM)
2" TIP
2 3/4" TIP
2 1/2" TIP
2 1/4" TIP
STACK TIP PERFORMANCE
(PRESSURE IS NOZZLE EXIT PITOT PRESSURE)
PRESSURE (PSI)
0 1000 2000 3000 4000 5000 6000 7000
(LPM)

©Copyright Task Force Tips LLC 2023 20 LIY-220 August 21, 2023 Rev00
Figure 6.1C
YST-4NN Reach Graphs
0
20
40
60
80
0.0 40.0 80.0 120.0 160.0 200.0 240.0 280.0
50 PSI
60 PSI
100 PSI
80 PSI
HORIZONTAL DISTANCE (FEET)
VERTICAL DISTANCE (FEET)
VERTICAL DISTANCE (M)
0.0 40.0 80.0 20.0 60.0
HORIZONTAL DISTANCE (M)
2 INCH TIP
0
10
20
0
20
40
60
80
0.0 40.0 80.0 120.0 160.0 200.0 240.0 280.0
HORIZONTAL DISTANCE (FEET)
VERTICAL DISTANCE (FEET)
2.25 INCH TIP
60 PSI
100 PSI
80 PSI
50 PSI
VERTICAL DISTANCE (M)
0.0 40.0 80.0 20.0 60.0
HORIZONTAL DISTANCE (M)
0
10
20
0
20
40
60
80
0.0 40.0 80.0 120.0 160.0 200.0 240.0 280.0
HORIZONTAL DISTANCE (FEET)
VERTICAL DISTANCE (FEET)
2.50 INCH TIP
50 PSI
60 PSI
100 PSI
80 PSI
0.0 40.0 80.0 20.0 60.0
HORIZONTAL DISTANCE (M)
VERTICAL DISTANCE (M)
0
10
20
0
20
40
60
80
0.0 40.0 80.0 120.0 160.0 200.0 240.0 280.0
VERTICAL DISTANCE (FEET)
HORIZONTAL DISTANCE (FEET)
2.75 INCH TIP
50 PSI
60 PSI
100 PSI
80 PSI
VERTICAL DISTANCE (M)
0
10
20
0.0 40.0 80.0 20.0 60.0
HORIZONTAL DISTANCE (M)