Chamberlain LA400EV Manual page 3

2
Content
(1) Motor LA400EV (1x)
(2) Postbracket (1x)
(3) Key (2x)
(4) Gate fixing bracket (1x)
(5) Clevis pin (2x) and rings (4x)
(6) Manual (1x)
BEFORE YOU BEGIN
The drive mechanism needs room to the side permitting correct installation of drive
arms. Please make sure that this is available. Gates affected by high wind loads must
also be protected by an (electric) lock
There are many factors to consider when choosing the right drive mechanism Assu-
ming that a gate functions properly, „startup" is the most difficult phase, once the gate
is in motion, significantly less force is usually required to move it.
• Gate size: Gate size is a very important factor Wind can brake or distort the gate,
thereby increasing the amount of force needed to move it considerably
• Gate weight: The weight of the gate in not as relevant as the size
• Effect of temperature: Low outdoor temperatures can make initial startup more
difficult (changes in the ground, etc.) or even prevent it.
• Duty cycle: 24 volt drives can run permanently
INSTALLATION CHECKLIST - PREPARATIONS
Check the carton contents and read the instructions carefully Make sure your gate
equipment operates perfectly The gate must run evenly and smoothly and must not
stick at any point Remember that the ground level may be several centimeters higher
in winter The gate must be stable and as free of backlash as possible in order to
prevent any unwanted to and fro movement The more smoothly the gate leaf runs,
the more sensitive the force adjustment must be
Note down any materials you still need and obtain them before starting to install Hea-
vy-duty plugs, bolts, gate stops, cables, distribution boxes, tools, etc
3
Gate Types
The gate type determines the location where the drive mechanism is installed If the
gate stop is on the ground, the drive mechanism must also be installed at a height that
is as low as possible so that it cannot twist the gate Use only parts of the gate frame
for fixing purposes.
TYPE A, B, C
For steel gates, the gate fitting must be attached to the main frame. If you are uncer-
tain whether the available support is sufficiently stable, reinforce it.
TYPE D, E, F
In the case of wooden gates, the gate fitting must be through bolted. It is advisable
to fit a plate from the outside so that the fixing brackets cannot become loose over
time Thin wooden gates must also be reinforced in order to withstand the stresses
encountered (eg type F)
4
Gate Configuration
How far must the gate leaf open?
90 degrees or up to 115 degrees An opening angle in excess of 115 degrees is possi-
ble to a limited extent but is not recommended Reason: the drive mechanism always
runs at the same speed The further the gate has to be opened, the faster the gate leaf
must travel. Movement becomes more erratic and this subjects the fittings and gate to
extreme stresses
For gates without limit switches: Non-identical opening angles cause one drive
mechanism to reach its destination first, but continues to run, thereby forcing the gate
up against the gate stop until the other motor eventually reaches its end position (see
figure 4A-F)
Tip for professionals: The time taken to reach the limit stop can be controlled by de-
liberately selecting different A and B dimensions (left + right). However, this method of
installing subjects the fittings to high stresses and can cause the gate to run erratically.
It is recommended that only experienced gate installers adopt this method
NOTE: If the gate opens towards a wall, there is a risk of entrapment Should the dis-
tance between the wall and the open gate be less than 200 mm, this area must later
be secured via a light barrier or contact strip
5
Gate Stops
It is advised to use a fixed gate stop in both the open and close directions.
Gate stops save wear and tear on the drive mechanism, gate and fittings. Operating a
gate without fixed limit stops results in poor performance. It is often dangerous,
leads to premature wear and voids your warranty!
6
Post Fixing Bracket
Choosing the correct location for the post fixing bracket has a decisive impact
on the subsequent functioning of the system. It determines the distance between
the motor's centre of motion and the gate's centre of motion and hence the opening
angle These dimensions are referred to as dimension A and dimension B Do not
underestimate the effect that these dimensions have on correct functioning and run-
ning Try and achieve the best dimension for your opening angle, as precisely as pos-
sible and suitable for all circumstances See Table (figure 5A) for dimensions A/B
If the post is not wide enough, an extension piece must be fitted to it (figure 6B) If
the post is too thick, cut out part of it to make it thinner (figure 6D)or offset the gate
(figure 6C)
To obtain ideal dimensions, it may be necessary to shorten or lengthen the supplied
hinge plate In the case of gates that are to be custom made, if the gate hinges are
fitted on the posts appropriately, it is possible to influence dimensions A and B. Before
the final mounting dimensions are determined, you should always check whether or
not there is any possibility that the corner of the drive mechanism will hit the post as
the gate swings
INSTALLATION: The drive mechanism exerts considerable force against the post
Usually, acceptable mounting dimensions are obtained if the supplied hinge plate is
welded directly onto the post In the case of thick stone or concrete posts, the hinge
must be welded to a base plate and attached so that the plugs cannot work loose
during operation Heavy-duty plugs where a threaded rod is bonded into the masonry
stress-free are more suitable for this purpose than steel or plastic straddling plugs In
the case of brickwork pillars, bolt on a relatively large steel plate that covers several
bricks and then weld the hinge plate to it An angle plate attached over the corner of
the post is also a good means of fixing the operators.
7
Gate Fitting
The gate fitting must be installed so that it is horizontal relative to the post bracket.
The distance between the gate bracket and post bracket is referred to as the „arm
span" When the gate is closed, the drive mechanism is 99% extended When the gate
is opened, the drive mechanism is 1% extended Fully retracting or extending the
plunger/spindle in operation (with gate) damages the drive mechanism and voids the
warranty It is absolutely imperative to comply with the required arm span under all
circumstances! For steel gates, fixings should be welded on or through bolted. When
through bolting the gate, use large washers or a plate on the other side The drive
mechanism exerts an extremely high force on this joint Fixings must be through bol-
ted for wooden gates. Wood deflects under load and the bolt will become loose. Due
to movement caused by repeated loading, the wood deflects more and more until the
gate no longer closes correctly and has to be repaired
Fit a reinforcing plate from the outside and one on the inside so that the wood cannot
deflect and the joint cannot become loose. Thin wooden gates without a metal frame
must also be reinforced in order to withstand continuous stresses (eg type F)
8
Release
The drive mechanism can be released The gate can then be opened and operated
manually (power failure) With a new drive mechanism, the release action may someti-
mes feel stiff/jerky. This is normal and has no effect on function.
Release: Insert the key in the cylinder lock and turn it 180 degrees
Then turn the release lever 180 degrees – done!
Engage: Turn the lever glockwise As soon as the gate moves or the drive runs, the
gear locks again Use the lock to protect the lever against unauthorized release
9
Installing The Drive Arm
Release the drive. Push the released drive onto the fittings and secure it by using the
supplied bolts, nuts and rings „If the centre or inner hole, on the hinge plate, is used
to fix the post fixing bracket you MUST cut away the remaining section of the hinge
plate before activating the arms. Failure to do so will result in breaking the fixing bra-
cket" Do not use a hammer when you mount the operator on the bracket
2 / EN