Viking Access Systems T 21 Original instructions

INSTALLATION
INSTRUCTIONS
AND SAFETY INFORMATION
FOR THE VIKING T-21 GATE OPERATOR
CLASS I, II, III AND IV
Heavy-Duty Commercial
Vehicular Swing Gate Operator
CLASS I, II, III AND IV
Heavy-Duty Commercial

The T-21™ gate operator has the capacity to operate swing gate up to
2000 lbs./12 ft. or 1200 lbs./20 ft. at 100% duty cycle under extreme
conditions. This effi cient operator provides a solution for high traffi c
commercial and industrial applications. The T-21™ operator offers
effi ciency and technology combined in a single package.
THE VIKING T-21™ SWING GATE OPERATOR
The T-21™ gate operator has the capacity to operate swing gate up to

T-21 Vehicular Gate Operator • Revision T21NXMN10.F • February 2016

VIKING TECHNICAL SUPPORT 1.800.908.0884
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PARTS DIAGRAM:
Item Description Part No.
1 Operator Cover Bolt (4) VASWCB
2 Operator Cover VNXT21CV
3 Output Shaft Knob DWOUK10
4 Output Shaft Cover VNXSWOSC
5 Clutch Key VAWRCK20
6 Clutch and Handle DWCL20
7 Output Arm DWAR20
8 Output Shaft T21OP20
9 Control Board VFLEXPCBU16
10 Fuse - 15 amp VNXF15A
11 Fuse - 4 amp VNXF4A
12 Limit Switch Bracket T21LH
13 Limit Switch Holder DWLH10
14 Limit Switch (2) DULS10
15 Limit Cam & Holder DWLC10
16 Worm Gear #80 30:1 T21GB80
17 Sprocket (Gearbox) T21SP2034
18 Chain #50x36 Pitches T21CH50
19 Sprocket (Motor) T21SP1534
20 24V DC Gearhead Motor VAT21MO
21 Brush Kit VAMOBK
22 Chassis VNXF1CH
23 Loop Rack VA-LR
24 Battery Switch DUMRS10
25 Motor Switch DUMRS10
26 Battery DUBA12
27 Modular Power Box Assembly VNXMPB
28 Toroid Transformer - 15 amp DUTT15
29 Power Box Panel Assembly VNXUPBPA
30 120V Receptacle VA120PL
31 Main Power Switch DUMRS10
32 Alarm DUAL10
33 Power Harness VNXSWPH
34 Limit Switch Harness VNXT21LSH
35 Multi-Part Arm Assembly (Standard) VA-F1ARM20
Option Swivel Arm Assembly (for inclines up to 10°) VAF1SWL20

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OPERATOR REFERENCES:
1. COVER BOLTS
2. OUTPUT SHAFT COVER (HAT)
3. MAIN COVER ASSEMBLY
4. MANUAL RELEASE HANDLE
releases the clutch to allow for manual operation
5. CLUTCH KEY
install if application does not require clutch to slip;
remove to manually operate the gate
6. OUTPUT ARM
connects the Arm Assembly to Clutch & Handle
Assembly
7. VFLEX CONTROL BOARD
8. MOTOR SWITCH
discontinues power to the motor; also serves as
a breaker that will self-trip to protect the motor
circuitry
9. BATTERY SWITCH
disconnects batteries from the charging circuit
during troubleshooting
10. MAIN AC POWER SWITCH
discontinues the 115/230VAC power supplied to the
operator
11. EMI FUSE
main power supply protection
12. MODULAR POWER BOX ASSEMBLY
removable; provides a convenient solution for
optional low voltage installations
13. LOOP RACK
for convenient loop detector installation
14. J-BOX
high voltage power supply connection
15. COVER BOLT MOUNTING BRACKET

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CONTROL BOARD REFERENCES:
1. POWER HARNESS CONNECTOR
provides power to the control board.
pg 18-19
2. “OPEN LEFT” & “OPEN RIGHT”
provides power to the motor. pg 20
3. LIMIT SETUP BUTTONS
available for future developments.
4. FEATURE ACTIVATION TRIM POTS
activate and set features. pg 24
5. “EPS1” CONNECTOR
available for future developments.
6. “EPS2” CONNECTOR
available for future developments.
7. EMI BOARD CONNECTOR
monitors the high voltage power
supply.
8. “CHECK MOTOR” Status LED
indicates motor power status. pg 36
9. “BATTERY LOW” Status LED
indicates battery power status. pg 36
10. “POWER” Status LED
control board power status. pg 18,36
11. “MAGNETIC LOCK RELAY” Status LED
status of this on-board relay. pg 34, 36
12. “MAGNETIC LOCK RELAY” Terminal Block
connect electric locks here. pg 34, 36
13. INPUT STATUS LEDs
indicates input status. pg 36-37
14. ACCESS CONTROL TERMINAL BLOCKS
accessory connections. pg 29-32, 42-44
15. “MASTER/SLAVE” Terminal Block
wired master/slave connection. pg 22
16. CONTROL BOARD MOUNTING HOLES
secures and grounds the control board.
17. “Siren” Terminal Block
Vikings UL Siren is connected here.
18. ON-BOARD 3 BUTTON STATION
controls the gate during set up.
19. “AUX. PWR” Terminal Block
used for solar applications & in-motion
warning devices. pg 19, 25
20. FEATURE ACTIVATION PIN HEADERS
activate features by placing a jumper
onto the pin headers. pg 25
21. “DIAGNOSE” Button
allows you to navigate through the
Diagnostics LCD Display. pg 38-40
22. “DIAGNOSE” LED
informs that errors have been detected
and available on LCD Display. pg 38-40
23. LCD DIAGNOSTICS DISPLAY
provides error messages, diagnostics
and operator status information.
pg 38-40
24. EXPANSION PRODUCT CONNECTIONS
connections for additional products
from Viking Access Systems. pg 46
25. “FAIL SAFE/SECURE” Jumper
available for future developments
26. FUSE HOLDER - 15 AMP
for motor circuit.
27. FUSE HOLDER - 4 AMP
for charging circuit.
28. HEAT SINK
secures the control board and
dissipates heat.

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TABLE OF CONTENTS:
PARTS DIAGRAM/PARTS LIST 2
OPERATOR REFERENCES 3
CONTROL BOARD REFERENCES 4
IMPORTANT SAFETY INFORMATION 6-12
Important Safety Instructions 6
Important Installation Instructions 7
Maintenance 8
General Safety Precautions 8-9
Operator Classification 9
Secondary Entrapment Protection Requirements 10
Secondary Entrapment Protection Installation 11
Manual Release 11
Audible Alarm Reset Installation 12
Warning Placard Installation 12
IMPORTANT INSTALLATION INFORMATION 13
Specifications 13
GATE OPERATOR INSTALLATION 14-17
Concrete Pad Option 14
(Blank Page) 15
Operator Positioning; Arm Assembly 16-17
ELECTRICAL INSTALLATION 18-19
High Voltage Supply Option 18
Low Voltage Supply Option 19
Solar Supply Option 19
LIMITS SETUP 20-21
MASTER/SLAVE SET UP 22-23
Two Wire Communication 22
Wireless Communication Options 23
CONTROL BOARD SETUP 24-27
Initial Settings 24-25
Obstruction Detection Sensor (Primary Entrapment Protection) 26
Heater, Lock Mode................................................................................................................. 27
ACCESSORY CONNECTIONS 29-35
Re-Open Photo Beam (Vehicular Safety) 29
Radio Receiver (Typical) 30
Anti-Tail Gate, Open Commands, Guard Station 31
Viking Loop Rack 32
Guidelines for Loop Installations 33
Magnetic Lock, Lock Solenoid 34
Barrier Arm (B-12) Synchronization Option 35
TROUBLESHOOTING 36-41
LED References 36-37
LCD Display References 38-40
Solutions 41
APPENDIX A, B & C 42-45
VIKING EXPANSION PRODUCTS 46
PARTS DIAGRAM/PARTS LIST
2
OPERATOR REFERENCES
3
IMPORTANT INSTALLATION INFORMATION
13
GATE OPERATOR INSTALLATION
14-17
ELECTRICAL INSTALLATION 18-19
LIMITS SETUP 20-21
MASTER/SLAVE SET UP
22-23
CONTROL BOARD SETUP 24-27
ACCESSORY CONNECTIONS 29-35
TROUBLESHOOTING
36-41
VIKING EXPANSION PRODUCTS
46
APPENDIX A, B & C
42-45
CONTROL BOARD REFERENCES
4
IMPORTANT SAFETY INFORMATION
6-12

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IMPORTANT SAFETY INFORMATION
!WARNING! Not Following these instructions may cause severe injury or death.
IMPORTANT SAFETY INSTRUCTIONS
!WARNING! To reduce the risk of severe injury or death.
1. READ AND FOLLOW ALL INSTRUCTIONS.
2. Never let children operate or play with gate controls. Keep the remote away
from children.
3. Always keep people and objects away from the gate. NO ONE SHOULD
CROSS THE PATH OF THE MOVING GATE.
4. Test the gate operator monthly. The gate MUST reverse on contact with
a rigid object or when an object activates the non-contact sensors. After
adjusting the force or the limit travel, retest the gate operator. Failure to
adjust and retest the gate operator properly can increase the risk of injury or
death.
5. Use the emergency release only when the gate is not moving.
6. KEEP GATES PROPERLY MAINTAINED. Read the user’s manual. Have a
qualified service person make repairs to gate hardware.
7. The entrance is for vehicles only. Pedestrians must use a separate entrance.
8. Every gate operator installation MUST have secondary protection devices
against entrapment, such as edge sensors and photo beams more in
particularly in places where the risk of entrapment is more likely to occur.
9. SAVE THESE INSTRUCTIONS.
IMPORTANT INSTALLATION INSTRUCTIONS
1. Install the gate operator only when:
a. The operator is appropriate for the construction of the gate and usage
Class of the gate (refer to page 9),
b. All openings of a horizontal slide gate are guarded or screened from the
bottom of the gate to a minimum of 6 feet (1.83 m) above the ground to
prevent a 2-1/4 inch (57.2 mm) diameter sphere from passing through the
openings anywhere in the gate, and in that portion of the adjacent fence
that the gate covers in the open position,
c. ALL EXPOSED PINCH POINTS ARE ELIMINATED OR GUARDED, AND
d. GUARDING IS SUPPLIED FOR EXPOSED ROLLERS.
2. The Operator is intended for installation only on gates used for vehicles.
Pedestrians must be supplied with a separate access opening. The pedestrian
access opening shall be designed to promote pedestrian usage. Locate the
gate such that persons will not come into contact with the vehicular gate
during the entire path of travel of the vehicular gate.
3. The gate must be installed in a location so that enough clearance is supplied
between the gate and adjacent structures when opening and closing to
reduce the risk of entrapment. Swinging gates shall not open in to the public
access areas.
4. The gate must be properly installed and work freely in both directions prior to
the installation of the gate operator. Do not over-tighten the operator clutch
or pressure relief valve to compensate for a damaged gate.
5. The gate operator controls must be placed so that the user has full view of
the gate area when the gate is moving AND AWAY FROM THE GATE PATH
PERIMETER.

VIKING TECHNICAL SUPPORT 1.800.908.0884 7
IMPORTANT SAFETY INFORMATION
!WARNING! Not Following these instructions may cause severe injury or death.
IMPORTANT INSTALLATION INSTRUCTIONS (Continued)
6. Controls intended for user activation must be located at least six feet (6’)
away from any moving part of the gate and where the user is prevented from
reaching over, under, around or through the gate to operate the controls.
Exception: Emergency access controls only accessible by authorized personnel
(i.e. fire, police, EMS) may be placed at any location in the line-of-sight of the
gate.
7. The Stop and/or Reset button must be located in the line-of-sight of the gate.
Activation of the reset control shall not cause the operator to start.
8. A minimum of two (2) WARNING SIGNS shall be installed, in the area of the
gate. Each placard is to be visible by persons located on the side of the gate on
which the placard is installed.
9. For gate operators using non-contact sensors (photoelectric beam or like) in
accordance with section 31.1.1 of the UL standard:
a. See instructions on the placement of non-contact sensors for each type of
application (refer to page 10).
b. Care shall be exercised to reduce the risk of nuisance tripping, such as
when a vehicle, trips the sensor while the gate is still moving, and
c. One or more non-contact sensors shall be located where the risk of
entrapment or obstruction exists, such as the perimeter reachable by a
moving gate or barrier (refer to page 10).
d. Use only Miller Edge photoelectric beams (refer to pages 10-11).
10. For a gate operator utilizing a contact sensor (edge sensor or like) in
accordance with section 31.1.1 of the UL 325 standard:
a. One or more contact sensors shall be located where the risk of entrapment
or obstruction exists, such as a the leading edge, trailing edge, and post
mounted both inside and outside of a vehicular horizontal slide gate (refer
to page 10).
b. One or more contact sensors shall be located at the bottom of a vehicular
vertical lift gate.
c. One or more contact sensors shall be located at the pinch point of a
vehicular vertical pivot gate.
d. A hardwired contact sensor shall be located and its wiring arranged so
that the communication between the sensor and the gate operator is not
subject to mechanical damage.
e. A wireless contact sensor such as one that transmits radio frequency
(RF) signals to the gate operator for entrapment protection functions
shall be located where the transmission of the signals are not obstructed
or impeded by building structures, natural landscaping or similar
obstructions. A wireless contact sensor shall function under the intended
end-use conditions.
f. One or more contact sensors shall be located on the inside and outside
leading edge of a swing gate. Additionally, if the bottom edge of a swing
gate is greater than 6 inches (152 mm) but less than 16 inches (406 mm)
above the ground at any point in its arc of travel, one or more contact
sensors shall be located on the bottom edge.
g. One or more contact sensors shall be located at the bottom edge of a
vertical barrier (arm).
h. Use only Miller Edge edge sensor (refer to pages 10-11).

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IMPORTANT SAFETY INFORMATION
MAINTENANCE
Remove the Power Harness from the Control Board. (refer to page 18)
•Cleanandlubricatetheturningpinsandgatehingesusingtherecommended
lubricant.
•Checkthatallhardwareofthegateoperatorisproperlytighten.
•Ensurethatthegatemovesfreely.
•Checkforcorrodedpartsandreplaceifnecessary.
•Checkthebatteryforthefollowing:
- Battery connections must be free of corrosion.
- Battery voltage must be 26VDC (fully charged battery).
Reconnect the Power Harness for the Control Board. (refer to page 18)
•Checkandconfirmtheproperoperationofallsafetydevices(photoelectric
eye, edge sensors or like).
•Checkandconfirmtheoperationofallinstalledaccessories.
•CheckandconfirmtheoperationofallspecialfeaturessuchastheIntelligent
Obstruction Sensor, Hold Open Timer. (refer to page 24 and 26)
•Checkandconfirmtheoperationofthemanualrelease.(refertopage11)
•Verifythefunctionally of the battery backup, or power failure option, by
turning off the main power source (115VAC or 230VAC). DO NOT FORGET TO
TURN ON THE MAIN POWER SOURCE AFTER VERIFICATION.
GENERAL SAFETY PRECAUTIONS
The following precautions are an integral and essential part of the product and must be
supplied to the user. Read them carefully as they contain important indications for the
safe installation, use and maintenance.
•Theseinstructionmustbekeptandforwardedtoallpossiblefutureusersofthe
system.
•Thisproductmustbeusedonlyforthatwhichithasbeenexpresslydesigned.
•Anyotheruseistobeconsideredimproperandthereforedangerous.
•Themanufacturercannotbeheldresponsibleforpossibledamagecausedby
improper, erroneous or unreasonable use.
•Avoidoperatingintheproximityofthehingesormovingmechanicalparts.
•Donotenterthepathofthemovinggatewhileinmotion.
•Donotobstructthemotionofthegateasthismaycauseasituationofdanger.
•Donotallowchildrentoplayorstaywithinthepathofthemovinggate.
•Keepremotecontroloranyothercontroldevicesoutofthereachofchildren,in
order to avoid possible involuntary activation of the gate operator.
•Incaseofbreakdownormalfunctioningoftheproduct,disconnectfromthemain
power source. Do not attempt to repair or intervene directly, contact only qualified
personnel for repair.
•Failuretocomplywiththeabovemaycreateasituationofdanger.
•Allcleaning,maintenanceorrepairworkmustbecarriedoutbyqualifiedpersonnel.
•Inordertoguaranteethatthesystemworksefficientlyandcorrectlyitisimportant
to have the manufacturer’s instructions on maintenance of the gate and operator
carried out by qualified personnel.
•Inparticular,regularchecksarerecommendedinordertoverifythatthesafety
devices are operating correctly.
All installation, maintenance and repair work must be documented and made
available to the user.
!WARNING! Not Following these instructions may cause severe injury or death.

VIKING TECHNICAL SUPPORT 1.800.908.0884 9
! CAUTION: To Reduce the Risk of Fire or Injury to Persons:
IMPORTANT SAFETY INFORMATION
Install the gate operator only when:
The operator is appropriate for the construction of the gate and the Usage Class of
the gate.
UL325 Gate Operator Classifications
GLOSSARY
RESIDENTIAL VEHICULAR GATE OPERATOR
CLASS I - A vehicular gate operator (or system) intended
for use in garages or parking areas associated with a
residence of one-to four single families.
COMMERCIAL/GENERAL ACCESS VEHICULAR GATE OPERATOR
CLASS II – A vehicular gate operator (or system)
intended for use in a commercial location or building
such as a multi-family housing unit (five or more single
family units), hotel, garages, retail store, or other
building servicing the general public.
INDUSTRIAL/LIMITED ACCESS VEHICULAR GATE OPERATOR
CLASS III – A vehicular gate operator (or system)
intended for use in an industrial location or building
such as a factory or loading dock area or other
locations not accessible by or intended to service the
general public.
RESTRICTED ACCESS VEHICULAR GATE OPERATOR
CLASS IV – A vehicular gate operator (or system)
intended for use in a guarded industrial location or
building such as an airport security area or other
restricted access locations not servicing the general
public, in which unauthorized access is prevented via
supervision by security personnel.
a. Use only the following type and size battery(ies): Yuasa NP7-12 or VIKING DUBA12
b. Donotdisposeofthebattery(ies)inre.Thecellsmayexplode.Checkwithlocal
codes for possible disposal instructions.
c. Do not open or mutilate the battery(ies). Released electrolyte is corrosive and may
cause damage to the eyes or skin. It may be toxic if swallowed.
d. Exercise care in handling batteries in order not to short the battery with conducting
materials such as rings, bracelets and keys.
e. Changethebattery(ies)providedwithoridentiedforusewiththisproductonlyin
accordancewiththeinstructionsandlimitationsspeciedinthismanual.
f. Observe proper polarity orientation between the battery(ies) and charging circuit.
g. Do not mix batteries of differ ant sizes or from different manufactures in this
product (applies to products employing more than one user replaceable secondary
battery).
h. A battery-operated product employing a secondary battery supply intended to be
chargedwithintheproductshallcontainspecicinstructionsconcerningtheproper
method of charging.

VIKING TECHNICAL SUPPORT 1.800.908.0884
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IMPORTANT SAFETY INFORMATION
Secondary Entrapment Protection Requirements
IMPORTANT: SECONDARY PROTECTION MUST BE INSTALLED
• REQUIRED BY UL 325, an approved MONITORED secondary entrapment
protection sensor is REQUIRED to be installed in all areas accessible to potential
entrapment and pinch points.
• The installed sensor MUST be “10K Resistor Based”.
• At least ONE monitored sensor MUST be connected.
• You may connect up to FOUR monitored sensors, wired parallel.
• Failure to install an approved monitored secondary entrapment protection
sensor will render the gate operator INOPERABLE until one is installed.
• Consult the installation manual of the sensor for detailed information about the
usage, installation and maintenance.
• This type of installation will only reverse the gate approximately 12” in the opposite
direction it was traveling when the sensor is triggered.
• This type on installation is to protect against entrapment only and DOES NOT
reverse the gate all the way back to its limits when the photo beam is obstructed.
• The following devices comply with UL 325 and have been tested for use with Viking
Access Systems gate operators.
Photoelectric Beam (non-contact sensor)
MILLER EDGE: 10K Resistor based model IG2
Edge Sensor (contact sensor)
MILLER EDGE: 10K Resistor based models ME110 through ME117, ME120 and ME123
!WARNING! Not Following these instructions may cause severe injury or death.
Photo Beam (non-contact sensor)
Edge Sensor (contact sensor)

VIKING TECHNICAL SUPPORT 1.800.908.0884 11
Manual Release
When manual operation is required:
1. Remove the “Output Shaft Cover” or Hat.
2. Lift the “Manual Release Handle”.
3. Remove the “Clutch Key”.
To resume normal operation:
1. Align the notches on the Output Shaft to
the clutch and reinstall the Clutch Key.
2. Push the Manual Release Handle down,
back to the locked position.
Refer to page 17 for more details
IMPORTANT SAFETY INFORMATION
!WARNING! Not Following these instructions may cause severe injury or death.
Secondary Entrapment Protection Installation
24VDC to Photoelectric Beam Emitter
To Photoelectric Beam Receiver
and/or Edge Sensor monitored terminals
STEP 1
Connect the secondary entrapment protection sensor(s) to the Viking control board as
illustrated. Up to four 10K resistor based sensors can be wired in parallel.
STEP 2
Confirm the number of
sensors connected:
• Toggle the “Diagnose”
button until you see UL
LEARN on the LCD Display.
• Default setting is 1 sensor.
Proceed with the following
Learn Process:
• If the number of connected
sensors does not match the
display.
• If the “Stop” LED is flashing.
• If the error message ERR UL
SENSOR is displayed.
LEARN PROCESS
With the “UL LEARN” menu displayed
and all secondary sensors properly
connected to the control board:
• Press and hold the “Stop” button.
• Toggle the “Diagnose” button once.
• The correct number of sensors
should now be displayed.
UL LEARN
SENSOR 1

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Audible Alarm Reset Switch Installation
Manual Reset for the Audible Alarm
• UL325 standard requires an audible alarm to sound after two consecutive events
detected by the primary entrapment protection of the gate operator (obstruction
sensor).
• The audible alarm will continue to sound for 5 minutes or until a stop command
gets actuated.
• The Stop command can be actuated in two different forms:
1. Using the Built in Stop switch on the Control Board or;
2. Using an External Stop button within the sight of the gate, away from moving
parts of the gate and out of reach of children.
a. Controls intended for user activation must be located at least six feet (6’)
away from any moving part of the gate and where the user is prevented from
reaching over, under, around or through the gate to operate the controls.
Outdoor or easily accessible controls shall have a security feature to prevent
unauthorized use.
b. The Stop and/or Reset button must be located in the line-of-sight of the gate.
Activation of the reset control shall not cause the operator to start.
IMPORTANT SAFETY INFORMATION
!WARNING! Not Following these instructions may cause severe injury or death.
Warning Placard Installation
• All Warning Placards must be installed
where visible in the area of the gate.
• A minimum of two placards shall be in-
stalled.
• A placard is to be installed in the area of
each side of the gate and be visible.
2

VIKING TECHNICAL SUPPORT 1.800.908.0884 13
! CAUTION: To Reduce the Risk of Fire or Injury to Persons:
! WARNING: For use with gates at a maximum 2000 lbs. in weight or 20 ft. in length.
IMPORTANT INSTALLATION INFORMATION
1200 lb.
Locate Control Buttons:
1. Within sight of the gate,
2. At a minimum height of 5 feet
so small children are not able to
reach it; and
3. At least 6 feet away from all
moving parts of the gate.
DO NOT allow pedestrian use of this gate DO NOT install the gate operator to lift gates
20 ft.
2000 lb.
12 ft.
Specications:
Maximum Gate Length: 20 ft. / 12 ft.
Maximum Gate Weight: 1200 lb. / 2000 lb.
Operating Temperature: -20°F (-28°C) to 160°F (71°C)
Power Requirements: 115VAC / 230VAC (6.0* Amp / 1.5 Amp) *Includes 3 amp load on receptacle
Single Phase (50Hz / 60Hz)
Alternative Power 24VAC / VDC (60VA) or Solar

VIKING TECHNICAL SUPPORT 1.800.908.0884
14
GATE OPERATOR INSTALLATION
Concrete Pad Option
1. Follow the local building code to determine the required depth of the
concrete pad.
2. Pad measurements recommended by Viking Access Systems are at least
23” long, 20” wide and 30” deep to ensure the stable operation of the
operator, and a minimum of 6” above level grade to avoid any flooding of
the machinery.
3. Provide a sufficient number of conduit pathways for all low power
accessories such as loop detector leads, maglock, non-contact sensors,
contact sensors, safety and other commands. Also provide conduit for the
power supply to the operator.
!DO NOT run low voltage and high voltage wiring in the same conduit.
!Provide at least 12” separation between low and high voltage conduits.

VIKING TECHNICAL SUPPORT 1.800.908.0884 15
Post Mounting Option
TIP: The operator can be post mounted to be elevated above snow and flood lines.
1. Consult the local building codes for the depth and concrete requirements.
2. Maximum 3.00” OD pipe.
3. Provide a sufficient number of conduit pathways for all low power accessories.
Also provide conduit for the power supply to the operator.
!DO NOT run low voltage and high voltage wiring in the same conduit.
!Provide at least 12” separation between low and high voltage conduits.
GATE OPERATOR INSTALLATION
REQUIRED ADD-ON: PART# VA-F1PS
• Main pieces made of 1/4” thick material
• All mounting hardware is included
• Posts and U-Bolts are not supplied

VIKING TECHNICAL SUPPORT 1.800.908.0884
16
Operator Positioning
!IM PORTANT: Swing Gates must not open into public access areas.
The gate must be installed in a location so that enough clearance is supplied between the
gate, while opening and closing, and adjacent structures to reduce the risk of entrapment.
GATE OPERATOR INSTALLATION
!TECHNICAL TIPS: Operator and Arm Geometry
• Increasing “C” dimension provides better gate control and stability by reducing the
effects of inertia and deceasing the gate leverage against the operator.
• Following to the geometrical formulas and relationships provided is recommended.
Arm Assembly: VA-F1ARM20 and VA-F1SWL20
VA-F1ARM (Standard) Typical installations. Gate travels level.
VA-F1SWL20 (Option) Gate travels on an incline, up to 10° and with a
maximum pull scale force of 70 lbs. to manually pull the gate up grade,

VIKING TECHNICAL SUPPORT 1.800.908.0884 17
GATE OPERATOR INSTALLATION
STEP 1
Install the Clutch and cut the
Arm Assembly to achieve
the desired dimensions for
“D” and “E” according to the
formulas provided on page 16.
STEP 2
With the gate at the closed,
install the Arm Assembly.
Check that the dimensions
correspond accordingly to the
formulas provided on page 16.
!IM PORTANT: When attaching the Arm Assembly to the gate, if the “Gate Bracket” is not
welded to a frame member that runs the full length of the gate, the operator may damage
the gate. Do not attach the Gate Bracket to only a few pickets.
!TIP: Leave some additional material
when cutting the Arm Assembly to
allow for adjustment.
!TIP: Use C-clamps or tack-weld the Arm
assembly in place until Step 3 has been
completed.
STEP 3
With the Clutch installed and released,
manually move the gate to both limits.
Verify the following:
1. The gate reaches the desired limits.
2. The Arm does not bind at any point.
STEP 4
Once satisfied with the installation and
movement of the gate, weld the arm
pieces securely. Paint the Arm to protect
against rusting.
STEP 5
Rotate the Clutch until it lines up with the
notches on top of the Output Shaft and
insert the Clutch Key.
STEP 6
Verify the Clutch is adjusted properly.
• Both sides adjusted evenly.
• Handle is locked, by hand, and
positioned horizontally at 0°.
With the Clutch Key removed, the
Clutch should not slip with moderate
force applied to the gate.

VIKING TECHNICAL SUPPORT 1.800.908.0884
18
High Voltage Supply Option
!Caution: Always turn off power breakers when working with high voltage. DO NOT
connect the “Power Harness” to the Control Board until the electrical installation is
complete and ready for verification.
ELECTRICAL INSTALLATION
Ground Rod
Earth Ground
2a
1a
1b
3b
3c
3d
Tips for proper ground installation:
To minimize the effects caused by lightning, follow
these guidelines.
• Use a ground rod to provide a ground reference.
• Consult your city code and be aware of under-ground
services in the site of the gate operator to prevent
inconveniences.
• Always use a single bonding point for grounding.
• All ground wires must be as short and as thick as
possible.
• Prevent unnecessary turns or loops in all ground
wires.
STEP 1
At the “Power Box”:
a. Set the “Voltage Selector” according
to the supply voltage (115V or 230V).
b. Turn the “AC Power” switch ON
STEP 2
!WARNING: SINGLE PHASE AC ONLY
At the “J-Box”:
a. Connect the incoming power wires,
matching the wire color codes.
b. If the supply voltage is 120VAC,
connect the red wire, labeled “Outlet
Power”, to the neutral (white) wires.
STEP 3
a. Turn ON the main facility breaker
b. Verify that all three (3) LEDs are
illuminated at the “Power Box”.
c. Turn the “Battery Switch” ON.
At the Control Board:
d. Connect the Power Harness and verify
the “POWER” LED is illuminated solid.
!TECHNICAL TIP: If the “Power” LED is
flashing or any of the 3 LEDs on the
“Power Box” are not illuminated, refer
to the Troubleshooting pages.