Mighty Mule Silver-HD Dual 25th annivesary series User manual

©2007 Gates That Open, LLC
Installation Manual for the
WARNING!
This equipment is similar to other gate or door equipment and meets or exceeds
Underwriters Laboratory Standard 325 (UL 325). However, gate equipment has
hazards associated with its use and therefore by installing this product the installer
and user accept full responsibility for following and noting the installation and
safety instructions. Failure to follow installation and safety instructions can result
in hazards developing due to improper assembly. You agree to properly install
this product and that if you fail to do so Gates That Open, LLC shall in no event
be liable for direct, indirect, incidental, special or consequential damages or loss
of profits whether based in contract tort or any other legal theory during the
course of the warranty or at any time thereafter. The installer and/or user agree to
assume responsibility for all liability and use of this product releasing GTO from
any and all liability. If you are not in agreement with this disclaimer or do not
feel capable of properly following all installation and safety instructions you may
return this product for full replacement value.
READ ALL INSTRUCTIONS CAREFULLY AND COMPLETELY before
attempting to install and use this automatic gate opener. This gate opener
produces a high level of force. Stay clear of the unit while it is operating and
exercise caution at all times.
All automatic gate openers are intended for use on vehicular gates only.
This product meets and exceeds the requirements of UL 325, the standard which regulates gate opener safety,
as established and made effective March 1, 2000, by Underwriters Laboratories Inc.
rev - 08/25/11 Printed in China for GTO
L
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HEAVY DUTY
ANNIVERSARY
SERIES
3121 Hartseld Road • Tallahassee, Florida, USA 32303
Telephone GTO Sales: 1-800-543-GATE (4283) or [phone] • Fax [phone]
or GTO Technical Service: 1-800-543-1236 or [phone] • Fax [phone]
www.gtoaccess.com

U.L. Gate Operator Classications
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 multifamily housing unit (ve 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 airport security area or other restricted access locations not
servicing the general public, in which unauthorized access is prevented via supervision by security personnel.
Product Usage
The GTO Gate Operator meets all of the safety requirements of a Class I Residential Vehicular Gate Operator
and is intended for use solely with vehicular swing gates in single-family residential applications.
The GTO Gate Operator system certied to be in compliance with the following safety standards (current
edition as of publication date):
Converting Metric Units to English Equivalents
When You Know Multiply By To Find Symbol
centimeters 0.3937 inches in. (or ")
meters 3.2808 feet ft. (or ')
kilograms 2.2046 pounds lb. (or #)
Converting English Units to Metric Equivalents
When You Know Multiply By To Find Symbol
inches 2.5400 centimeters cm
feet 0.3048 meters m
pounds 0.4535 kilograms kg
Converting Temperature
deg. Celsius (°C x 1.8) + 32 deg. Fahrenheit °F
deg. Fahrenheit (°F-32) ÷ 1.8 deg. Celsius °C
Serial Number: ___________________________________ Date of Purchase: ________________
Place of Purchase:___________________________________________________________________
Please record the following information product serial number (located on right side of control box), be sure to
keep all receipts for proof of purchase. Refer to this information when calling GTO for service or assistance
with your automatic gate opener.
FOR YOUR RECORDS
Product in compliance with the latest UL-325 and UL-991 safety standards by ETL. Product in
compliance with CAN/CSA-C22.2 No. 247-92.
Product in compliance with IEC 60335-2-103:2003 and IEC 60335-1:2004, including A1:2004.

Gate Opener Class Categories -------------------------------------------------------------inside cover
Units and Standards Conversion Chart ---------------------------------------------------inside cover
PLEASE READ THIS FIRST! --------------------------------------------------page iii
Important Safety Instructions --------------------------------------------------page 1
Disconnecting the Opener -------------------------------------------------------------page 1
Important Safety Instructions for the Consumer------------------------------------page 2
Secondary Means of Protection Against Entrapment ------------------------------page 5
Required Safety Precautions for Gates-----------------------------------------------page 6
Warning Signs and Labels -------------------------------------------------------------page 7
Installation --------------------------------------------------------------------------page 8
Parts List ---------------------------------------------------------------------------------page 8
Technical Specifications -------------------------------------------------------------page 10
Installation Overview -- ---------------------------------------------------------------- page 11
Installation of the Mounting Hardware ----------------------------------------------page 12
Mounting the First Opener ------------------------------------------------------------page 16
Installing the Second Opener---------------------------------------------------------- page 16
Installation of the Closed Position Stops --------------------------------------------page 17
Mounting the Control Box------------------------------------------------------------- page 19
Connecting the Opener Power Cables -----------------------------------------------page 20
Powering the System --------------------------------------------------------------page 21
Solar Chart-------------------------------------------------------------------------------page 21
Connecting the Transformer-----------------------------------------------------------page 23
Control Board Settings ----------------------------------------------------------page 24
Setting Closed Position Limits--------------------------------------------------------page 25
Setting Your Personal Transmitter Code -------------------------------------page 26
Obstruction Sensitivity -----------------------------------------------------------------page 27
Installing the Receiver -----------------------------------------------------------page 27
Connecting Accessories ----------------------------------------------------------page 28
Wiring Accessories ----------------------------------------------------------------page 29
Push to Open Installation --------------------------------------------------------page 30
Setting Open Position Limits----------------------------------------------------------page 31
Troubleshooting Guide -----------------------------------------------------------page 33
Repair Service ---------------------------------------------------------------------page 35
Column Installation Information ----------------------------------------------page 36
Accessory Catalog ----------------------------------------------------------------page 37
Table of Contents
KEEP THESE INSTRUCTIONS FOR FUTURE REFERENCE

PLEASE READ THIS FIRST!
iii
Thank you for purchasing a GTO/ACCESS SYSTEMS gate opener. When correctly installed and properly used,
your gate operator will give you many years of reliable service. Please read the following information to ensure
you have the correct system for your particular needs. This manual will enable you to properly install your
Automatic Gate Operator.
The gate operator is designed for installation on a pull-to-open single leaf gate. By purchasing two accessory
brackets [347IH], the gate operators can accommodate push-to-open gates (gates that open out from the
property). The gates must not exceed 18 feet in length nor weigh more than 850 pounds per leaf (please see
Technical Specifications on page 10). The gate operator can be used on vinyl, aluminum, chain link, farm tube,
and wrought iron gates. Use on solid (wood) gates is not recommended. Solid surface gates have a high resistance
to the wind. If the wind is strong enough, the operator will obstruct, stop, and blow fuses.
The gate operator accommodates extra transmitters, digital keypads, solar panels, push buttons, automatic gate
locks, and other access control products. These optional accessories are shown in the back of this manual.
The gate operator features adjustable stall force. This safety feature makes the gate stop and reverse direction
within two seconds when it comes in contact with an obstruction. The “MIN” setting means the gate will exert
the minimum force on an obstruction before it stops and reverses direction.
The gate operator also has an adjustable auto-close feature. It can be set to remain open from 3 to 120 seconds
before automatically closing. Pressing the transmitter button at any time after the gate fully opens will cause it to
close immediately. “OFF” is the factory setting; meaning the gate will stay open until you press the transmitter
button (or keypad, etc.) again.
Please call GTO at (800) 543-GATE [4283] or [phone] for more information about our GTO/ACCESS
SYSTEMS professional line of gate operators and accessories.
BEFORE YOU BEGIN TO INSTALL YOUR AUTOMATIC GATE OPERATOR:
Read these instructions carefully and completely to become familiar with all parts and
installation steps. You must read the installation manual for detailed instructions on gate
operator safety and proper use of the gate operator.
24/7 Troubleshooting Wizard: http://support.gtoinc.com

1
IMPORTANT SAFETY INSTRUCTIONS
Because automatic gate openers produce high levels of force, consumers need to know the potential hazards associated with
improperly designed, installed, and maintained automated gate opener systems. Keep in mind that the gate opener is just
one component of the total gate operating system. Each component must work in unison to provide the consumer with
convenience, security, and safety.
This manual contains various safety precautions and warnings for the consumer. Because there are many possible
applications of the gate opener, the safety precautions and warnings contained in this manual cannot be completely exhaustive
in nature. They do, however, provide an overview of the safe design, installation, and use of this product. CAREFULLY
READ AND FOLLOW ALL SAFETY PRECAUTIONS, WARNINGS, AND INSTALLATION INSTRUCTIONS TO
ENSURE THE SAFE SYSTEM DESIGN, INSTALLATION, AND USE OF THIS PRODUCT.
Precautions and warnings in this manual are identified with this warning symbol. The symbol identifies conditions
that can result in damage to the opener or its components, serious injury, or death.
Because GTO automatic gate openers are only part of the total gate operating system, it is the responsibility of the
consumer to ensure that the total system is safe for its intended use.
Disconnecting the Opener
1. Turn control box power switch OFF.
2. Remove hairpin clip, clevis pin, and bushing
from either the front or rear mounting point.
3. Remove the opener from the mount.
The gate can be opened and closed manually
when the opener is disconnected.
NOTE: Substitute a included Pin Lock for the clevis pin on the
front mount of each gate opener to prevent unauthorized removal
of the opener from the gate.
To Manually Open and Close the
Gate, Follow the Procedure Below:
CAUTION: The gate will move freely and uncontrolled when the gate opener is
removed from the gate. ONLY disconnect the opener when the control box power
switch is OFF and the gate is NOT moving.
Clevis Pin
Hairpin Clip
Gate Bracket
Front Mount
Bushing