Merlin G703 Installation Instructions Manual
remote control openers
security at your fingertips
G703
residential gate opener for sliding gates
Installation instructions
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Toll free helpline
Please have your serial number and
model name available before calling.
Australia 1800 638 234
New Zealand 0800 653 667
United Kingdom 0800 073 0112
www.merlingo.com
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Important safety instructions for
operation
WARNING Incorrect installation can lead to severe injury. Follow all
installation instructions.
Merlin Garage Openers Limited does not accept responsibility for damage or injury
resulting from installing this opener.
Before installing the drive remove or disable any equipment, such as locks, that is not
needed for powered operation.
Before installing the drive check that the gate is in good mechanical condition and that it
opens and closes properly.
Do not use force sensitivity adjustments to compensate for a binding or sticking gate.
Excessive force may damage the gate.
Install any fixed control, wired or wireless, within sight of the gate but away from moving
parts and at a height of more than 1.5 m.
After installation, ensure that the mechanism is properly adjusted and that the drive stops
when the gate contacts an obstruction.
Index
Site requirements
Gate
This opener is designed for residential sliding gates up to 8 metres long and less than 400
kg. The opener is rated to apply a maximum of 18 kg force (180 N).
Using a spring balance, check that less
than 15 kg force (150N) is required
to keep the gate moving by hand along
the full range of travel. The gate should
operate smoothly, opening and closing without sticking. The gate track
must be level.
It is recommended that stops are
added at each limit of the gate’s travel.
Level the gate
The gate track must remain level along
the full length of the gate’s travel.
Power supply
If the opener is to be mains-powered,
then the 3-pin power plug should be
shielded from the effects of weather.
The product is tested as a unit for
max
15kg
force
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electrical safety compliance and if the plug is cut off for hard-wiring, then the electrical
safety of the unit becomes the responsibility of the installing electrician.
An isolating switch is recommended, but all mains wiring should be in accordance with local
regulations, for example AS/NZS 3000:2000.
Low voltage cable sizes
Voltage will drop along low voltage cables over long distances. It is recommended to use
cable with conductors of the following minimum cross sectional areas. The table lists lengths
for twin-core cable, from the supply to the load.
For an optional solar panel, consider the total length from the panel to the controller board,
through to the battery.
Follow the table for minimum recommended conductor sizes for given lengths for each
power option..
Cable length From 10 W solar panel From controller to motor
to 12 V battery 12 V @ 6.5 A max
(for max 2% volt drop) (for max 5% volt drop)
3 m 1.0 mm
5 m 1.0 mm
10 m 1.0 mm
15 m 1.0 mm
20 m 1.0 mm
25 m 1.5 mm
30 m 1.5 mm
2
2
2
2
2
2
2
2.5 mm
4.0 mm
10 mm
16 mm
16 mm
16 mm
25 mm
2
2
2
2
2
2
2
Battery power with trickle charging
Due to the high cost of long runs of heavy cable, it may be more economic in some installations to operate the gates from a larger battery, which is charged from a remotely located
trickle charger.
For example, a 12V 500 mA plug pack can be located at the house, with only light gauge
wiring to the gate, controller, and battery some distance away. Due to varying gate loads
and duty cycles for each installation, this is a guide only.
Control box
Locate this in any convenient weather-protected position. All mounting holes and cable
entry or exits must be suitably sealed to prevent water from entering the enclosure. Cables
should exit the control box from below only.
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1 Opener
2 Receiving IR
sensor (3-wire)
3 Transmitting IR
sensor (2-wire)
4 Push-button
(must be rated
suitably for the
weather conditions)
5 Keyed switch
(must be rated
suitably for the
weather conditions)
6 Keypad (wireless
control; optionally wired power supply)
7 Enclosure for controller, receiver, and optional backup battery
NOTE The Merlin M122 wired pushbutton and M128 wireless pushbutton are not
waterproof, and are only rated for interior use.
The Merlin KWF1 keyed switch is not intended for use fully exposed to weather in
gate installations.
Merlin does not warranty any items used outside their published ratings or intended
use.
Installation
Position the foundation plate correct distance from the face of
the gate
Dig a 100 mm deep trench, which is larger than the foundation plate
(at least 250 x 150), in the position where the plate must be located.
Fill this with concrete and position the plate in the concrete.
Ensure the cable conduit aligns with the aperture in the plate. The
surface of the foundation plate must be level and 5 mm above ground.
The edge of the plate should be 79 mm from the face
of the gate that the rack bolts to.
Position the foundation plate correct distance from the ends of the gate
When the gate is fully to its right hand position
the right hand edge of the plate must be at least
300 mm from the left end of the gate.
When the gate is fully to the left hand position, the
right hand edge of the plate must be at least 175 mm
from the right end of the gate.
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