Technical Specifications; Before You Begin; Solar Panel And Gate Activity Chart - Nortek Security & Control Mighty Mule HD272 Installation Manual

Technical Specifications

MIGHTY MULE HD272 DUAL GATE OPENER
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• Low friction screw drive (linear actuator) rated for -5 °F to +160 °F (-20 °C to +71 °C).
• Powered by a 12 V motor with integral case hardened steel gear reducer. Motor speed reduced to 260 rpm. Generates
520 inch lb. of torque at 12 V.
• Maximum opening arc of 110°. Approximate opening time (90°): 18 seconds, depending on weight of gate.
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• The system is powered by a 12 Vdc automotive, lawn tractor or marine battery (required but not included).
• Battery charge is 120Vac to 16Vac output through the control board] or by optional Solar Panels; the panel should
generate minimum of 10 Watts (600 mA). A diode on the control board prevents battery discharge. IMPORTANT:
Never use both transformer and solar panel— this will damage the battery and control board.
• One (1) blade-style fuse is rated for 15A.
NOTE: The transformer should not be directly connected to any battery. Do not replace fuses with
higher ampere rated fuses; doing so will void your warranty and may damage your control board.
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• Microprocessor-based control board is set for dual leaf, pull-to-open gate installations. Jumper can be removed to
accommodate an optional kit for push-to-open gates.
• Control board has temperature compensated circuits.
• Auto-memorization of digital transmitter code.
• Opener length with push-pull tube fully retracted is 26
• Adjustable auto-close timer (OFF to 3–120 seconds), and Dual Sense Technology™ stall force).
• Power terminal block accommodates a transformer or solar panels.
• Accessory terminal block fully compatible with all Mighty Mule access controls.
• Control board allows connection of edge sensors and photoelectric sensors.
• Audio entrapment alarm sounds if unit encounters an obstruction twice while opening or closing.
_____________________________________ OPERATIONAL CAPACITY _____________________________________
• Maximum gate size: 300 lbs., 12' long.
NOTE: BALL BEARING HINGES SHOULD BE USED ON ALL GATES WEIGHING OVER 250 LB.
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HD272 Installation Instructions
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DRIVE
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POWER
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CONTROL
3 / ", mounting point to mounting point. Maximum stroke is 13".
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Before You Begin

1. Determine Charging Options for Battery: Transformer OR Solar
NEVER USE TRANSFORMER AND SOLAR PANEL(S) AT THE SAME TIME!
It will damage the control board!
IMPORTANT
• The Mighty Mule 272 is designed and intended for use with a 12 Volt automotive, marine or lawn tractor battery. The
battery must be placed inside a weatherproof case and located within 6' of the control box. The 8' battery harness
connects the battery to the control board.
• The battery charge is maintained by the 16 Volt transformer included OR optional solar panel(s). The transformer OR
solar panel is connected to the control board using low voltage, 16 gauge, dual conductor, multi-stranded, direct burial
wire [RB509] (page 28).
• All low voltage wire used with the Mighty Mule Gate Opener must be 16 gauge dual conductor, multi-stranded, direct
burial wire.
• The transformer is intended for indoor use. If the transformer can only be plugged into an outside electrical outlet, a
weatherproof cover or housing must be used.
• If your gate is more than 1000' from an AC power source, you will need to use a solar panel charging kit (minimum 10
watts) . Refer to the Solar Panels and Gate Activity Chart below.

Solar Panel and Gate Activity Chart

The table and map illustrate the
maximum number of gate cycles
to expect per day in a particular
10 Watts
area when using from 10 to 20 watts of solar
20 Watts
charging power prior to the battery depleting to a
state where the unit will not function. The figures
shown are for winter (minimum sunlight) and do
not account for the use of any accessory items.
Accessories connected to your system will
draw additional power from the battery and
will require additional solar panels.
A deep cycle marine battery is recommended for
solar and/or high traffic applications.
NOTE: UP to 250 ft. of dual conductor, 16
gauge, multi-stranded wire may be used to allow
installation of solar panels in direct sunlight.
See page 23:
10 Watt Solar Panel [FM123]
Dual Gate
Zone 1 Zone 2 Zone 3
Winter Ratings
8 16 26
14 28 38
HD272 Installation Instructions
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