Viking Access Systems T 21 User manual

T-21 Vehicular Gate Operator • Revision BØ • October 2008

TECHNICAL SUPPORT 1 800 908 0884
i
PARTS DIAGRAMPARTS DIAGRAM
20
22
29
2124
6
4
3
2
1
32 Multi-Part Arm
See Page 11 for
Additional Details
25
11 18
19
8
9
13
12
14
7
28
23
2627
17
15
16
10
31
5
ItemDescription Part No.
1Output Shaft Knob DWOUK10
2Output Shaft Cover T21OC10
3 Clutch Key VAWRCK
4 Clutch and Handle DWCL10
5 Output Arm T21TARM
6 Output Shaft DWOP10
7 Worm Gear #80 30:1 T21GB80
8Sprocket 15 pitches, #50, 7/8 bore T215P507/8
9Endless #50x36 Pitches T21CH50
10 Sprocket 15 pitches, #50, 3/4 bore T215P503/4
11 24V 1 HP DC Motor/Gear Assembly T21MO10
12 Spacer DWSPA10
13 Limit Cam & Holder DWLC10
14 Limit switch (2) DULS10
15 Limit switch Holder DWLH10
16 Limit Switch Bracket T21LH
17 Alarm DUAL10
18 Electric Box DUEB10
19 Control Board DUPCB10
20 Chassis T21CHK
21 120V Receptacle VA120PL
22 EMI Board DUEMI10
23 Battery Fuse Holder VABFH
24 Battery (2) DUBA10
25 Toroid Transformer DUTT10
26 Limit Switch Harness VALSWHA
27 Power Harness VALSWHA
28 Operator Cover T21CO10
29 Operator Cover Bolt (2) VA-F1CB
30 Power Switch ????
31 Warning Placard DUWPA
32 Multi-Part Arm VA-F1ARM
Overall Dimensions
Weight 100 lb.
WARNING - For Installation By Qualified Personnel Only.
28-1/4"
16-1/2"
25-3/4"
EQEQ
7-3/4"
20"

TECHNICAL SUPPORT 1 800 908 0884 1
TABLE OF CONTENTSTABLE OF CONTENTS
Parts Diagram/Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .i
Important Safety Information
Important Safety Instructions ......................................2
Important Installation Instructions .................................2-3
Maintenance/General Safety Precautions ..............................4
To Reduce Risk of Fire or Personal Injury & Terminology ..................5
Photo Beam (non-contact sensor) Installation ..........................6
Edge Sensor (contact sensor) Installation ..............................7
Manual Release ................................................7
Audible Alarm Reset Switch Installation ..............................8
Warning Placard Installation ......................................8
Important Installation Information ..................................9
Specifications .................................................9
Plans of Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Plan of Installation – Concrete Pads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Gate Operator Installation
Step 1 through 6 – Operator Installation ............................12-13
Electrical Installation
Electrical Installation ............................................14
Single Unit Connections .........................................15
Gate Operator Installation
Step 6 – Limit Switch Setup .....................................16-17
Limit Switch Connections ........................................17
Electrical Installation
Battery & EMI Board Location .....................................18
Master/Slave Connections ........................................19
Vehicular Loop Detector Installation
Loop Layout Diagrams ..........................................20
Installation Guidelines ...........................................21
Optional Accessory Connections
Open Commands; Safety Connections; Repoen Photo Beam ................22
Radio Receiver ................................................23
Optional Electromagnetic Lock .....................................24
Magnetic Lock; Solenoid Connection; Guard Station .....................25
Special Features
Auto-Open Feature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
Intelligent Obstruction Sensor (Primary Entrapment Protection) .............27
Fail Safe/Fail Secure Operation; Hold Open Timer .......................28
Gate Overlap Setting ............................................29
Solar Panel Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30-31
Loop Rack Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35-37

TECHNICAL SUPPORT 1 800 908 0884
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WARNING - Not following these instructions may cause severe injury or death to persons.
IMPORTANT SAFETY INFORMATIONIMPORTANT SAFETY INFORMATION
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 control 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 of 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 manual release only when the gate is not moving.
6. KEEP GATES PROPERLY MAINTAINED. Read the owner’s manual. Have a qualified service per-
son make repairs to gate hardware.
7. The entrance is for vehicles only. Pedestrians must use separate entrance.
8. Every gate operator installation M
MU US ST Thave 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 the usage Class of the gate
(refer to page 5),
b) All openings of a horizontal slide gate are guarded or screened from the bottom of the gate
to a minimum of 4 feet (1.22 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 in 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 into 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,

TECHNICAL SUPPORT 1 800 908 0884 3
WARNING - Not following these instructions may cause severe injury or death to persons.
IMPORTANT SAFETY INFORMATIONIMPORTANT SAFETY INFORMATION
6. Controls intended for user activation must be located at least six feet (6’) away from any mov-
ing 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 secu-
rity feature to prevent unauthorized use.
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. All warning signs and placards must be installed where visible in the area of the gate. A minimum
of two placards shall be installed. A placard is to be installed in the area of each side of the
gate and be visible to persons located on the side of the gate on which the placard is installed.
9. For gate operators utilizing a non-contact sensor (Photo beam or like) in
accordance with section 31.1.1 of the UL325 standard:
a) See instructions on the placement of non-contact sensors for each Type of
application (refer to page 6),
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 6).
d) Use only Omron E3K-R10K4 photoelectric eye to comply with UL325
10. For a gate operator utilizing a contact sensor (Edge sensor or like) in
accordance with section 31.1.1 of the UL325 standard:
a) One or more contact sensors shall be located where the risk of entrapment or
obstruction exists, such as at the leading edge, trailing edge, and post mounted
both inside and outside of a vehicular horizontal slide gate (refer to page 7).
b) One or more contact sensors shall be located at the bottom edge 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 subjected 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 obstruction. 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) above the ground at any point in its arc of travel, one
or more contact sensors shall be located on the bottom edge (refer to page 7).
g) One or more contact sensors shall be located at the bottom
edge of a vertical barrier (arm).
h) Use only Miller Edge Model MGR20 or MGS20 edge sensor
to comply with UL325
IMPORTANT INSTALLATION INSTRUCTIONS Continued

TECHNICAL SUPPORT 1 800 908 0884
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WARNING - Not following these instructions may cause severe injury or death to persons.
IMPORTANT SAFETY INFORMATIONIMPORTANT SAFETY INFORMATION
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 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.
Installer:
_____________________________________________________ ____________
Signature Date
Contact: _________________________________________________________
_________________________________________________________
MAINTENANCE
Remove the Power Harness from the Control Board (refer to page 15)
• Clean and lubricate the turning pins and gate hinges using the recommended lubricant.
•Check that all mounting 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 26 VDC (fully charged battery).
Reconnect the Power Harness for the Control Board (refer to page 15)
• 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 22 to 28)
• Check and confirm the operation of the manual release (refer to page 7)
• Verify battery backup functionally by turning off the power source (120 VAC and 220 VAC). DO NOT
FORGET TO TURN ON THE POWER SOURCE AFTER VERIFICATION.

TECHNICAL SUPPORT 1 800 908 0884 55
UL325 Gate Operator Classification
CAUTION: To Reduce the Risk of Fire or Injury to Persons
GLOSSARY
RESIDENTIAL VEHICULAR GATE OPERATOR
CLASS I – A vehicular gate operator (or system) intended for use
in a home of one-to four single family dwelling, or a garage or
parking area associated therewith.
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 hous-
ing 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 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 air-
port security area or other restricted access locations not servic-
ing the general public, in which unauthorized access is prevented
via supervision by security personnel.
Install the gate operator only when:
The operator is appropriate for the construction of the gate
and the Usage Class of the gate.
IMPORTANT SAFETY INFORMATIONIMPORTANT SAFETY INFORMATION
a) Use only the following type and size of battery(ies): Yuasa NP7-12
b) Do not dispose of the battery(ies) in fire. The cells may explode. Check with local codes for possible dis-
posal instructions.
c) Do not open or mutalate the battery(ies). Released electrolyte is corrosive and may cause damage to the
eyes or skin. It may be toxic fi swallowed.
d) Exercise care in handling batteries in order not to short the battery with conductying materials such as
rings, bracelets and keys.
e) Change the battery(ies) provided with or identified for use with this product only in accordance with the
instructions and limitations specified in this manual.
f) Observe proper polarity orientation between the battery(ies) and charging circuit.
g) Do not mix batteries of different sizes or from different manufacturers 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 specific instructions concerning the proper method of charging.

TECHNICAL SUPPORT 1 800 908 0884
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IMPORTANT SAFETY INFORMATIONIMPORTANT SAFETY INFORMATION
Gate in Open Position
Photo Beam Unit Reflector
Potential Entrapment
Area (Shaded)
Radio Station
Mag.
Lock
Mag. Lock
Safety ConnectorOpen CommandsGuard StationMaster/Slave
Brake
UL
Siren
Radio
Rec.
UL
Sensor
OPEN RIGHT
OPEN LEFT
Safety
Loop
Center
Loop
Obstruction
Sensor
Charger
Power
Low Battery
Motor Sensor
Hold Open
Timer
Stop
Overlap Delay
Close Open
Obstruction
Sensor
min.MAX
Overlap Delay
1.5
03
Radio Station Loop Connector Open Commands Guard Station Master/Slave
GND Close Stop Open GND Close Stop Open Gnd Fire Gnd Strike Gnd Exit Gnd Center Gnd Reopen Gnd UL Gnd +28v Gnd Radio Gnd +28v +28v
Mag.
Lock
Fail Safe/Secure
Mag. Lock
N.C.
COM
N.O.
Charger
Power
Low Battery
Motor Sensor
Hold Open
Timer
Stop CloseOpen
LimitLimit
30sec
60secoff
1sec
Radio
Rec.
UL
Sensor
Safety
Loop
Center
Loop
Brake
UL
Siren
Obstruction
Sensor
min. MAX
Overlap
Delay
1.5
0
3
Mag.
Lock
Fail
Safe/Secure
Hold Open
Timer
Stop
Close Open
30
60
Off 1
Radio
Rec.
UL
Sens
Safety
Loop
Center
Loop
Brake
Siren
11
(C1)(C1)
33
(NC1)(NC1) 24VDC24VDC
1
(C1)
3
(NC1) 24VDC
Turn Switch to
'Light On' Position
24 VDC Power Connections
24 VDC Power Connections
Omron Model
E3K-R10
Shown
Connection '3' (NC1)
Connection '1' (C1)
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.
Consult the installation manual for the UL325 device (photo
beam or like) for detail information about the usage,
installation and maintenance.
WARNING - Not following these instructions may cause severe injury or death to persons.
Photo Beam (non-contact sensor) Installation
Secondary Entrapment Protection
Photo beams or like must be installed to reduce the risk of entrapment.
Use only Omron E3K-R10K4 photoelectric eye to comply with UL325
Make the electrical connections of the photoelectric sensor as described here in this page.
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
One or more non-contact sensors shall be located where the risk of entrapmentor
obstruction exists, such as the perimeter reachable by a moving gate or barrier.
NOTE - This type of installation DOES NOT reverse the gate all the way back to its limits when the photo-beam
is obstructed. This installation is only to protect against entrapment and to comply with UL325.

TECHNICAL SUPPORT 1 800 908 0884 7
WARNING - Not following these instructions may cause severe injury or death to persons.
IMPORTANT SAFETY INFORMATIONIMPORTANT SAFETY INFORMATION
Edge Sensor (contact sensor) Installation
Secondary Entrapment Protection
Manual Release When manual operation is required:
1. Remove the Hat
2. Lift the Locking Handle.
3. Remove the Clutch Key
To reengage the gate operator:
1. Align the Clutch and the notches on the
Output Shaft.
2. Insert the Clutch Key.
3. Push down the Locking Handle.
4. Reattach the Hat.
Attention: Lock and release operations MUST
be performed with motor NOT RUNNING.
Remove Hat
Locking Handle
(in Unlocked
Position)
Radio Station
Mag.
Lock
Mag. Lock
Safety Connector Open Commands Guard Station Master/Slave
Brake
UL
Siren
Radio
Rec.
UL
Sensor
OPEN RIGHT
OPEN LEFT
Safety
Loop
Center
Loop
Obstruction
Sensor
Charger
Power
Low Battery
Motor Sensor
Hold Open
Timer
Stop
Overlap Delay
Close Open
Obstruction
Sensor
min.MAX
Overlap Delay
1.5
03
Radio Station Loop Connector Open Commands Guard Station Master/Slave
GND Close Stop Open
GND Close Stop Open
Gnd Fire Gnd Strike Gnd Exit
Gnd Center Gnd
Reopen Gnd UL Gnd +28v
Gnd Radio
Gnd +28v
+28v
Mag.
Lock
Fail Safe/Secure
Mag. Lock
N.C.
COM
N.O.
Charger
Power
Low Battery
Motor Sensor
Hold Open
Timer
Stop CloseOpen
LimitLimit
30sec
60secoff
1sec
Radio
Rec.
UL
Sensor
Safety
Loop
Center
Loop
Brake
UL
Siren
Obstruction
Sensor
min. MAX
Overlap
Delay
1.5
0
3
Mag.
Lock
Fail
Safe/Secure
Hold Open
Timer
Stop
Close Open
30
60
Off 1
Radio
Rec.
UL
Sens
Safety
Loop
Center
Loop
Brake
Siren
Edge sensor or like must be installed to reduce the risk of entrapment.
Use only Miller Edge 3-sided activation type MGR20 or MDS20 to comply with UL325
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) above the ground at any point in its arc of travel, one or more
contact sensors shall be located on the bottom edge.
1. A hardwired contact sensor shall be located and its wiring arranged so that the
communication between the sensor and the gate operator is not subjected to
mechanical damage.
2. 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 obstruction. A wireless contact sensor
shall function under the intended end-use conditions.
3-Sided Edge Sensor
3-Sided Edge Sensor

TECHNICAL SUPPORT 1 800 908 0884
8
Audible Alarm Reset Switch Installation
WARNING - Not following these instructions may cause severe injury or death to persons.
IMPORTANT SAFETY INFORMATIONIMPORTANT SAFETY INFORMATION
Warning Placard Installation
Manual Stop
Button
5'
Minimum
STOP
6'
Radio Station
Mag.
Lock
Mag. Lock
Safety ConnectorOpen CommandsGuard StationMaster/Slave
Brake
UL
Siren
Radio
Rec.
UL
Sensor
OPEN RIGHT
OPEN LEFT
Safety
Loop
Center
Loop
Obstruction
Sensor
Charger
Power
Low Battery
Motor Sensor
Hold Open
Timer
Stop
Overlap Delay
Close Open
Obstruction
Sensor
min.MAX
Overlap Delay
1.5
03
Radio Station Loop Connector Open Commands Guard Station Master/Slave
GND Close Stop Open GND Close Stop Open Gnd Fire Gnd Strike Gnd Exit
Gnd Center Gnd
Reopen Gnd UL Gnd +28v Gnd Radio Gnd +28v +28v
Mag.
Lock
Fail Safe/Secure
Mag. Lock
N.C.
COM
N.O.
Charger
Power
Low Battery
Motor Sensor
Hold Open
Timer
Stop CloseOpen
LimitLimit
30sec
60secoff
1sec
Radio
Rec.
UL
Sensor
Safety
Loop
Center
Loop
Brake
UL
Siren
Obstruction
Sensor
min. MAX
Overlap
Delay
1.5
0
3
Mag.
Lock
Fail
Safe/Secure
Hold Open
Timer
Stop
Close Open
30
60
Off 1
Radio
Rec.
UL
Sens
Safety
Loop
Center
Loop
Brake
Siren
COM
N.O.
STOP
Manual Reset for the Audible Alarm
UL325 standard requires an audible alarm to go off 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 Box 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.
3. 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.
4. 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.
All Warning Signs and Placards must be installed where visible in the area
of the gate. A minimum of two placards shall be installed. A placard is
to be installed in the area of each side of the gate and be visible.

TECHNICAL SUPPORT 1 800 908 0884 9
CAUTION - FOR USE WITH GATES OF A MAXIMUM OF 12 FT IN LENGTH AND 2000 LBS.
IN WEIGHT OR 20 FT IN LENGTH AND 1200 LBS. IN WEIGHT.
WARNING - TO REDUCE THE RISK OF SEVERE INJURY OR DEATH TO PERSONS:
IMPORTANT INSTALLATION INFORMATIONIMPORTANT INSTALLATION INFORMATION
Specifications
This is NOT a pedestrian gate operator
2000 pounds maximum gate weight at
12’ maximum gate length.
1200 pounds maximum gate weight at
20’ maximum gate length
Do NOT Install the gate operator to lift gates
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. Away from all moving parts of
the gate.
Maximum Gate Length: 20 feet at 1200 lbs., 12 feet at 2000 lbs.
Maximum Gate Weight: 2000 lbs. at 12 feet, 1200 lbs. at 20 feet
Maximum Aperture Angle: 120 deg.
Power Requirements: 120 VAC Single Phase at 3 Amps
Or
220 VAC Single Phase at 1.5 Amps
Operating Temperature: -20°C (-4°F) to 70°C (158°F)
2000 lb.
MAX.
12'-0"
1200 lb.
MAX.
20'-0"
CLOSE
STOP
OPEN
ControlControl
ButtonsButtons
Control
Buttons

TECHNICAL SUPPORT 1 800 908 0884
10
PLANS OF INSTALLATIONPLANS OF INSTALLATION
BC
Inside
Outside
Gate in Closed Position
D
E
A
F
Gate in Open Position
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 into public access areas.
*Note: The dimensions provided are
just a guideline. Each site may have
different geometries or possibilities of
installation. The key for installation is
to have "E" longer than "D" and to
adjust the arms such that the arm is
straight at the closed position.
Figure A
Plan of Installation
The following are some examples:
NORMAL INSTALLATION
ABCDEF
13.75 10.5 22 14.75 21.5 23.25
13.75 10.5 26.5 14.75 23.5 24.25
13.75 10.5 26.5 17.75 23.5 25
13.75 10.5 39.5 22.5 33.5 30.5
Dimensional Formula
ABCDEF
(min= (min= A + 12 * D x 1.45 approx.
11.5) 9.5) E + 5
* Set D and E such that the arm is straight when the
gate is closed.
LONG DISTANCE OR RETROFIT INSTALLATION
ABCDEF
27 10.5 35 22.5 29.5 30
27 10.5 39.5 22.5 33.5 32
L
LO ON NG GA AN ND D/ /O OR RH HE EA AV VY YG GA AT TE ES S
ABCDEF
50 18 62 40 52 44
COMPACT INSTALLATION
ABCDEF
11.5 9.5 18.75 12 17.25 19.25
11.5 9.5 22 13.75 19.5 21
11.5 9.5 22 13.75 20 21.25
11.5 9.5 22 14.75 21.5 23.5
The installation shown using the
Straight Arm Secondary Extension can
NOT be back-driven. If a back-driven
installation is required, an Elbow Arm
Secondary Extension can be used.
Contact Viking Access for availability.

TECHNICAL SUPPORT 1 800 908 0884 11
PLAN OF INSTALLATION – DETAILSPLAN OF INSTALLATION – DETAILS
Drill for a 1/2" x 3-1/2"
Red Head Anchor
(4) Places
23-1/4" 11"
2.5"
2.5"
30"
7-5/8"
2-7/16"
10"
3-1/4"
6" Minimum
20"
12"
Conduit Location
Center of Output Shaft
Recommended Area
for Conduit(s)
Gate Operator
Concrete Pad
Gate Operator Concrete Pad
Operator Cover
Grade Level
See Note 2
Operator Chassis
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 lease 20” 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.
4. 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 (either 110 or
220 VAC). Extend the conduit the recommended height of 1” above the level of
the concrete pad. Install all conduit in the shaded area shown above.
Secondary Extension
Dimension E
on Page 10
Dimension
D– 2.5"
on Page 10
Primary Extension
Pivot Bracket
Arm Assembly Viking Part # VA-F1ARM
Concrete Pad
Viking Access Systems can supply an Elbow Arm
Secondary Extension to make the T-21 unit back-
drivable. Contact Viking Access for availability.

TECHNICAL SUPPORT 1 800 908 0884
12 16
STEP 1
Release the clutch (see page 7). Cut the
extension arms according to the desired plan
of installation (Figure A on page 10).
Note: Leave some additional material when
cutting the extension arms to allow for
additional adjustment.
STEP 2
Position the pieces of the articulated arm
with the gate in the closed position. Ensure
that the dimensions correspond to the chosen
plan of installation. Use C-clamps or tack-weld
pieces to aid in the pre-installation process.
Remove Excess
Extension Tube
STEP 3
With the clutch released, move the gate
manually from the completely open to the
completely closed position. Verify that:
A. The gate and arm combination can
provide the desired operation.
B. The arm does not bind in its movement,
especially in the open position.
Note: The total travel angle of the primary arm
on the output shaft determines the speed of the
gate operation. The smaller the travel angle,
the quicker the gate will open and close.
GATE OPERATOR INSTALLATIONGATE OPERATOR INSTALLATION
CAUTION - If mounting bar is not welded to
a frame member that runs the full length
of the gate, the gate operator may
damage the gate. Do not weld the bar or
backing plate to a few pickets.

TECHNICAL SUPPORT 1 800 908 0884 1317
Step 4
Upon observation of the satisfactory
arrangement of the articulated arm and
bracket, weld all pieces securely. Paint the
arm to protect it from rusting.
STEP 6
Check the Clutch adjustment. The Clutch is
shipped factory adjusted. The clutch must be
tight enough to prevent slippage in normal
operation.
Check the tightness of the Clutch:
A. Remove the Clutch Key from the clutch.
B. Attempt to move the gate by hand.
C. If slippage occurs:
1. Loosen the Locking Handle 180°
2. Tighten the opposite bolt.
3. Tighten the Locking Handle 180°
4. Check the tightness of the clutch again.
STEP 5
Upon test of the installation, loosen the
clutch and rotate it until it lines up with the
notches in the Output Shaft. Insert the
Clutch Key.
Tighten the Clutch
GATE OPERATOR INSTALLATIONGATE OPERATOR INSTALLATION
NOTE – For proper operation of the Clutch,
keep the gap between the Clutch halves
even when adjusting (the Clutch will have
to be removed from the Output Shaft in
order to adjust the Release Handle bolt).
Adjust the
Opposite Bolt
Insert
Clutch Key

TECHNICAL SUPPORT 1 800 908 0884
14 18
The Gate Operator requires a single phase AC
line to operate and charge the batteries.
1. Turn off the main switch or breaker for
the power line being used.
2. Move the selector switch on the Incoming
Voltage Selector to the proper position
(115 for 110 to 120VAC, 230 for 200 to 240VAC).
3. Connect the incoming power wires to the
terminals as shown in the illustration.
4. Turn on the main switch or breaker once
the installation is ready for final
adjustments.
5. To verify that there is AC power to the
system, check that the ‘Charger’ LED on the
Control Board is on.
ELECTRICAL INSTALLATIONELECTRICAL INSTALLATION
Tips for proper ground installation
A good ground in a gate operator
installation will minimize or prevent damage
to the operator cause by natural events such
as lightning strikes.
The following will provide a guideline for
proper grounding:
1. Use a ground rod to provide a ground
reference.
2. Consult your city code and be aware of
under-ground services in the site of the
gate operator to prevent inconveniences.
3. Use always a single bonding point for
grounding.
4. All ground wires must be as short and as
thick as possible.
5. Prevent unnecessary turns or loops in all
ground wires.
Caution – Do not connect the power harness to the board
until the installation is ready for verification.
To
Transformer Hot
Power Ground
115V/220V
Power Switch
Earth Ground
Neutral
3A FUSE
Part # VAEMI
Ground Rod
Earth Ground
Radio Station
Mag.
Lock
Mag. Lock
Safety ConnectorOpen CommandsGuard StationMaster/Slave
Brake
UL
Siren
Radio
Rec.
UL
Sensor
OPEN RIGHT
24V BAT 24VAC
OPEN LEFT
Safety
Loop
Center
Loop
Obstruction
Sensor
Charger
Power
Low Battery
Motor Sensor
Hold Open
Timer
Stop
Overlap Delay
Close Open
Obstruction
Sensor
min. MAX
Overlap
Delay
1.5
0
3
Radio StationLoop ConnectorOpen CommandsGuard StationMaster/Slave
GND Close Stop Open
GND Close Stop Open
Gnd Fire Gnd Strike Gnd Exit
Gnd Center Gnd
Reopen Gnd UL Gnd +28v
Gnd Radio
Gnd +28v
+28v
Mag.
Lock
Fail
Safe/Secure
MAG. LOCK
N.C.
COM
N.O.
Charger
Power
Low Battery
Check Motor
Hold Open
Timer
Stop
Close Open
30
60
Off 1
Radio
Rec.
UL
Sens
Safety
Loop
Center
Loop
Brake
Siren
JP3
C35 C36
Power Harness
White
Green
Red
Black
Auxili
ary

TECHNICAL SUPPORT 1 800 908 0884 15
Power Connections
ELECTRICAL INSTALLATION – SINGLE UNITELECTRICAL INSTALLATION – SINGLE UNIT
Connect the wire harness to the “OPEN RIGHT”
connector if the gate opens to the right.
Connect the wire harness to the “OPEN LEFT”
connector if the gate opens to the left.
Radio
Rec.
UL
Sensor
OPEN RIGHT
OPEN LEFT
Safety
Loop
Center
Loop
Obstruction
Sensor
Charger
Power
Low Battery
Motor Sensor
Obstruction
Sensor
min. MAX
Charger
Power
Low Battery
Motor Sensor
Radio
Rec.
UL
Sensor
Safety
Loop
Center
Loop
Radio
Rec.
UL
Sensor
OPEN RIGHT
OPEN LEFT
Safety
Loop
Center
Loop
Obstruction
Sensor
Charger
Power
Low Battery
Motor Sensor
Obstruction
Sensor
min. MAX
Charger
Power
Low Battery
Motor Sensor
Radio
Rec.
UL
Sensor
Safety
Loop
Center
Loop
Gate opens towards right
Gate opens towards left
OPEN LEFT
OPEN RIGHT

TECHNICAL SUPPORT 1 800 908 0884 1516
Left Limit Switch
Right
Limit Switch
Clutch
Limit Switch Cam
Clutch Guide Pin
Cam Wheel
STEP 7
A. Loosen the screws on the Limit Switch Cams.
B. With the operator cover still off, remount
the articulated arm, making sure the cam
wheel pin is engaged with the clutch.
C. Move the gate manually to the closed position.
D. Move the Limit Switch Cams on the Cam
Wheel to actuate each limit switch.
Gate Opens to Right
Left Limit Switch Open limit
Right Limit Switch Close limit
Gate Opens to Left
Left Limit Switch Close limit
Right Limit Switch Open limit
(see diagram on right to determine which
direction to move the cams)
E. Slightly tighten the screw on the Limit
Switch Cam.
F. Move the gate manually to the open
position. Repeat steps a, b and c for the
other cam.
G. Run the unit 2 full cycles without
interruption (from limit to limit) to
execute a “Learn Cycle.”
H. Fine-tune the adjustment of the Limit
Switch Cams.
Note:
Ensure that the cams move without restriction
through the course of the arm’s movement.
Left Limit Switch
Right Limit Switch
Set Left Cam
In This Direction
Set Right Cam
In This Direction
Cam Wheel
Limit Switch Cam
Limit Switch Setup
Step 8
Install the Clamshell Cover by carefully
slipping the front half over the Limit
Switches and Cam Wheel., then fitting the
back cover in place. Latch the hasps on both
sides of the Cover.
Adjust the 
Opposite Bolt
LIMIT SWITCH SET-UPLIMIT SWITCH SET-UP