Viking Access Systems K-2S Original instructions

INSTALLATION
INSTRUCTIONS
AND SAFETY INFORMATION
FOR THE VIKING K-2S GATE OPERATOR
NEW IMAGE
FOR THE VIKING K-2S GATE OPERATOR
NEW IMAGE
CLASS I
Solar Residential Vehicular
Slide Gate Operator

The K-2S™ Viking Solar Gate Operator has the capacity to operate
slide gates up to 700 lbs. and 30 ft. long under extreme conditions.
This efcient operator provides a solution for residential slide gate
solar applications thanks to its efcient electromechanical design.
Equipped with latest solar innovations, the K-2S™ is the most energy
efcient slide gate operator offered on the market.
THE VIKING K-2S™ SOLAR SLIDE GATE OPERATOR

VIKING TECHNICAL SUPPORT 1.800.908.0884 1
K-2s Solar Vehicular Gate Operator • Revision SK2MN10.F4 • April 2019

VIKING TECHNICAL SUPPORT 1.800.908.0884
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PARTS DIAGRAM:
Item Description Part No.
1 Chassis VSK2CH
2 Gearbox VNXK2GB
3 Motor VSK2MO
4 Brush Kit VAMBK
5 Electronic Positioning Sensor 2 (EPS2) VNXSLEPS2
6 Sprocket VAL3SP17
7 Idler Pulley DSIP10
8 Idler Bushing DSIB10
9 Manual Release Switch DUMRS10
10 Power Switch DUMRS10
11 Solar Charger VSCHARGSL
12 Solar Terminal Block Assembly VSTBASL
13 Solar Battery Breaker VASBB25
14 Solar Panel Switch DUMRS5
15 Solar Control Board VSPCBU18
16 Alarm DUAL10
17 Lock Cylinder & Key(s) VNXSLCL
18 Operator Cover VNXK2CV
19 Fuse - 4 amp VNXF4A
20 Fuse - 15 amp VNXF15A
21 25’ #40 Chain Kit, Nickel Coated VAL3CKN
22 Motor Harness VNXK2MH

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OPERATOR REFERENCES:
1. OPERATOR COVER
2. COVER LOCK
3. SOLAR CONTROL BOARD
4. SOLAR CHARGER
regulates and distributes solar power
5. MANUAL RELEASE/MOTOR SWITCH
discontinues power to the motor and allows for
manual operation of the gate
6. POWER SWITCH
discontinues all power to the control board
7. EPS (ELECTRONIC POSITIONING SENSOR)
sensor for the digital limits
8. MOTOR
9. GEAR BOX
10. SOLAR TERMINAL BLOCK ASSEMBLY
connections for solar panels and battery
11. SOLAR PANEL SWITCH/BREAKER
discontinues power from the solar panels to the
Solar Charger
12. BATTERY BREAKER
resettable breaker protects the battery circuit

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CONTROL BOARD REFERENCES:
1. POWER HARNESS CONNECTOR
provides power to the control board.
pg 20
2. “OPEN LEFT” & “OPEN RIGHT”
provides power to the motor. pg 21
3. LIMIT SETUP BUTTONS
sets limit positions. pg 21-22
4. FEATURE ACTIVATION TRIM POTS
activate and set features. pg 24
5. “EPS1” CONNECTOR
communication for Viking Solar
Charger.
6. “EPS2” CONNECTOR
monitors the limit positions.
7. “EMI” CONNECTOR
not applicable to this model.
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 36
11. “MAGNETIC LOCK RELAY” Status LED
status of this on-board relay. pg 36
12. “MAGNETIC LOCK RELAY” Terminal Block
connect electric locks here. pg 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 23
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 20, 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
power failure option. pg 25
26. FUSE HOLDER - 15 AMP
for motor circuit.
27. FUSE HOLDER - 4 AMP
not applicable to this model.
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
Entrapment Protection Requirements 10
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
Post Mounting Option 15
Operator Positioning 16-17
ELECTRICAL INSTALLATION 18-20
Battery & Solar Panel Selection 18
Solar Panel Care & Installation Tips 19
Solar Connection & Power Saving Tips 20
LIMITS SETUP 21-22
MASTER/SLAVE SET UP 23
CONTROL BOARD SETUP 24-26
Initial Settings 24-25
Obstruction Detection Sensor (ODS) 26
ACCESSORY CONNECTIONS 28-35
UL, Re-Open (Monitored Input Terminals) 28-29
Radio Receiver (Typical) 30
Anti-Tail Gate, Open Commands, Guard Station 31
Viking Loop Rack 32
Guidelines for Loop Installations 33
Blank Page 34
Barrier Arm Synchronization 35
TROUBLESHOOTING 36-41
LED References 36-37
LCD Display References 38-40
Solutions 41
APPENDIX A, B 42-44
VIKING EXPANSION PRODUCTS 46
PARTS DIAGRAM/PARTS LIST
2
OPERATOR REFERENCES
3
IMPORTANT INSTALLATION INFORMATION
13
GATE OPERATOR INSTALLATION
14-17
ELECTRICAL INSTALLATION 18-20
LIMITS SETUP 21-22
MASTER/SLAVE SET UP
23
CONTROL BOARD SETUP 24-26
ACCESSORY CONNECTIONS 28-35
TROUBLESHOOTING
36-41
VIKING EXPANSION PRODUCTS
46
APPENDIX A, B
42-44
CONTROL BOARD REFERENCES
4
IMPORTANT SAFETY INFORMATION
6-12

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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.
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.
IMPORTANT SAFETY INFORMATION
!WARNING! Not Following these instructions may cause severe injury or death.

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)
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 32.1.1 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. For UL compliance: Use only Omron: E3K-R10K4-NR-1 // EMX: IRB-RET, IRB-MON //
Miller Edge: RG-K-R, PG-K-R100, PG-K-R50, MIM-62
For ETL compliance: Use only Seco-Larm E-931-33PRGQ, E-936-S45RRGQ, E-931-
S50RRGQ, E-960-D90GQ // EMX NIR-50-325
10. For a gate operator utilizing a contact sensor (edge sensor or like) in accordance
with section 32.1.1 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. For UL compliance: Use only EMX: WEL-200K // Miller Edge: ME110 through ME117,
ME120, ME123, MG020, MGR20, MGS20, RB-G-K10, MIM-62 // ASO: 25.30, 25.45,
95.20

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IMPORTANT SAFETY INFORMATION
!WARNING! Not Following these instructions may cause severe injury or death.
MAINTENANCE
Remove the Power Harness from the Control Board. (refer to page 20)
• Clean and lubricate the gate track wheels using the recommended lubricant.
• Inspect the track for any signs of cracking or separation.
• 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 13VDC (fully charged battery).
Reconnect the Power Harness for the Control Board. (refer to page 20)
• 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 7)
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.

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.

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IMPORTANT SAFETY INFORMATION
Monitored Entrapment Protection Requirements
IMPORTANT: MONITORED PROTECTION MUST BE INSTALLED
• REQUIRED BY UL 325, an approved MONITORED entrapment protection sensor is
REQUIRED to be installed in all areas accessible to potential entrapment and pinch
points.
• For Slide Gate Operators, a minimum of two monitored entrapment sensors are required to
be connected as follows: Either one to the UL terminal and one connected to the Re-Open
terminal, OR two monitored devices connected to the UL terminal, one for EACH DIRECTION
of travel.
! An external sensor connected to the “Re-Open” input terminal will protect against
entrapment ONLY in the closing direction.
• The installed sensor MUST be “10K Resistor Based”.
• You may connect up to FOUR monitored sensors, wired in parallel, to either the “UL”
and/or “ReOpen” terminals, for a total of 8 monitored sensors.
• Failure to install the required monitored entrapment protection sensor(s) may render
the gate operator INOPERABLE. The gate can be moved manually. Refer to page 11.
• Consult the installation manual of the sensor for detailed information about the usage,
installation and maintenance.
• Use only UL Recognized Component Edge Sensors and Photoelectric Sensors. Refer to
pg 7.
SLIDE GATE ENTRAPMENT ZONE – Locations between a moving gate and a counter opposing
edge or surface where entrapment is possible up to 1.8 m (6 ft) above grade. Such
locations occur if during any point in travel the gap between a moving gate and fixed
counter opposing edges or surfaces is less than 406 mm (16 in).
!WARNING! Not Following these instructions may cause severe injury or death.
Photoelectric Sensor (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 operator cover
2. Press the Manual Release Switch
(top) to the “RELEASE” Position.
The gate can now be moved manually.
To resume normal operation, press
the switch to the “ENGAGE” position.
MANUAL RELEASE
SWITCH
“UL” Protects against entrapment in both the opening and closing directions. Input will
reverse the gate momentarily in the opposite direction it was traveling. Refer to page 28.
“Re-Open” Protects against entrapment in the closing direction ONLY. Input will reverse the
gate all the way to the Open Limit. Refer to page 29.
IMPORTANT SAFETY INFORMATION
!WARNING! Not Following these instructions may cause severe injury or death.
!Cable use in Class 2 circuit to an external device shall be type CL2, CL2P, CL2R, CL2X or other
cable with equivalent or better electrical, mechanical, and fl ammability ratings.
Monitored Entrapment Protection Installation
STEP 1: Connect the monitored entrapment protection
sensor(s) to the Viking control board as illustrated.
!IMPORTANT: A minimum of two Monitored External Entrapment Sensors are required to be
connected as follows: One to the UL terminal and one connected to the Re-Open terminal,
OR two snesors connected to the UL terminal, one for EACH DIRECTION of travel.
UL LEARN
NO LEARN
10K Monitored Terminal
10K Monitored Terminal
STEP 2:
Execute the Learn Process:
• Toggle the “Diagnose” button
until you see UL LEARN NO LEARN
on the LCD Display.
• Press and hold the “Stop” button.
• Toggle the “Diagnose” button
once.
• The number of Monitored sensors
connected to the “UL” or Re-
Open terminals will now be
displayed.
EXAMPLE: UL LEARN
UL2 RO1
UL SENSOR ERRORS:
If an problem occurs with one of the monitored
entrapment sensors, the “Stop” LED will flash and
an ERR message will be displayed, indicating which
input terminal(s) the sensor is connected to.
TERMINAL: “UL” “Re-Open” “UL” & “Re-Open”
ERROR
MESSAGE:
ERR SENS
UL
ERR SENS
RO
ERR SENS
UL RO

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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 inherent 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 700 lbs. in weight or 30 ft. in length.
IMPORTANT INSTALLATION INFORMATION
700 lb.
30 ft
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
K-2S Specications:
UL 325 Classifcation: Class I *Refer to page 9
Maximum Gate Length: 30 ft.
Maximum Gate Weight: 700 lb.
Operating Temperature: -4°F (-20°C) to 160°F (71°C)

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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
24” long, 18” wide and 24” deep to ensure the stable operation of the
operator, and a minimum of 4” 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.
GATE OPERATOR INSTALLATION

VIKING TECHNICAL SUPPORT 1.800.908.0884 15
GATE OPERATOR INSTALLATION
Post Mounting Option
TIP: The operator is equipped for post mount applications and is ready for installation.
You will only need to supply the posts and U-Bolts.
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 acces-
sories 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.

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Operator Positioning
!IM PORTANT: All openings of a horizontal slide gate are guarded or screened from the bot-
tom 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.
GATE OPERATOR INSTALLATION

VIKING TECHNICAL SUPPORT 1.800.908.0884 17
GATE OPERATOR INSTALLATION
!TECHNICAL TIP: Before completing the installation procedure;
• Open and close the gate manually, making sure there is suf cient space between the gate
and adjacent walls.
• Check that the wheels are turning freely on the track and there are no restrictions while
pushing the gate to the open and closed positions.
• Con rm that there is adequate spacing for the guide rollers and that there are no
restrictions throughout the travel of the gate.
STEP 2
Chain Installation: Before welding the provided
chain brackets, make sure the chain will be in
a straight line with, and at the same height as,
the chain leaving the gate operator rollers.
STEP 1
Before securing the chassis to the concrete pad
or posts, make sure the gate and operator are
LEVEL and PARALLEL.
Minimum distance between the center of the
chain and the inside edge of the gate frame is 4”.
STEP 3
Chain Tension: The chain tension has a direct
effect on the motor current draw, or work
that the motor is performing. Adjust the Chain
to provide 6” of slack measured from the
imaginary taut line, straight down to the lowest
point of the chain as illustrated below.

VIKING TECHNICAL SUPPORT 1.800.908.0884
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ELECTRICAL INSTALLATION
Battery Selection
• Battery is sold separately.
• Use only UL recognized 12V Sealed Lead Acid (SLA)
• 35Ah Maximum battery capacity.
Battery Care and Location
• Use at least 12AWG wire, rated 90°C or better.
• A 35Ah battery can be stored on the chassis of the
operator, below the control board.
• Ensure the battery terminals will maintain a 1/4”
spacing from all other circuits and metal parts.
• Do not dispose of the battery in re. The cells may explode.
Check with local codes for possible disposal instructions.
• Do not open or mutilate the battery. Released electrolyte
is corrosive and may cause damage to the eyes or skin. It
may be toxic if swallowed.
• Exercise care in handling batteries in order not to short the
battery with conducting materials such as rings, bracelets
and keys.
• CAUTION - A battery can present a risk of electrical shock,
burn from high short circuit current, re or explosion from
vented gasses. Observe proper precautions.
• Observe proper polarity orientation between the battery
and charging circuit.
Solar Panel Selection
• Solar panel(s) are sold separately.
• Use only UL Listed 12V solar panel(s), such as Viking part #s:
Wattage Viking Part# Open-Circuit
Voltage
Short-Circuit
Current
20 Watts VA-SO20W 21.7V 1.25A
40 Watts VA-SO40W 21.8V 2.57A
! Important: The number of cycles achieved daily is dependent on many factors,
including current draw of the motor and accessories, and local solar radiation data.
If more specific information is needed please consult with Viking Access Systems.
For more information regarding solar energy refer to: http://rredc.nrel.gov/solar/
pubs/redbook/
Ratings
System Voltage: 12V
Max. Solar Wattage: 40W
Max. Solar Voltage: 29V
Max. Battery Capacity: 35Ah
Min. Battery Voltage: 8V
Max. Charger Load Current: 3A
Output Voltage for Controls: 24V This is the voltage the control board will provide
Battery
Storage
SAVE THESE INSTRUCTIONS - This manual contains important instructions for the
K-2s model gate operator that shall be followed during installation and maintenance
of the charge controller.