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Attaching Door Arm On The Trolley; Electrical Connection; Optional Accessories; Connecting The Opener - LiftMaster LM50K Anleitungen

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7.6

Attaching door arm on the trolley

The straight door arm is already pre-assembled.
Recommended installation:
The trolley can be separated from the drive by pulling the red handle
and manually pushing towards the door. When the door is closed,
fix the curved door arm (1) on the door bracket with the bolt (2) and
secure with cotter pin (3). Connect straight and curved door arms
together flush with an overlap of 2 holes with screw (4) and secure
with nut (5). Choose the holes in such a way that the door arm stands at
an angle of about 30-40°.
NOTE:
The curved door arm can be omitted, if the door fitting has been
attached at the far upper edge of the door.
Mount the release handle of the emergency release at a
height of at least 1.80 m.
Attach the yellow label regarding the release of the garage
door opener (sticker) on the cord of the door handle.
8

Electrical connection

In order to avoid personal injury and damage to the device,
the door opener should be operated only if such an instruction
is explicitly stated in this manual. The power plug must
always be freely accessible for the purpose of disconnecting the mains
supply.
8.1

Optional accessories

Installation of photocells
After installing and adjusting the door opener, photocells can be
installed (terminals 2 + 3). The installation instructions are included
with the photocells.
The optional photocells ensure that the door is open, or remains
open, if people, especially young children, are in the door area.
By means of the photocells, a closing door is opened or an open
door is obstructed from closing, if a person located in the door area
interrupts the sensor beam.
Photocells are particularly recommended for families with young
children.
Connecting the illuminated push button
All wall-mounted switches or buttons should be installed in
sight of the door outside the door or door rail area at a
height of 1.5 metres. In addition to these switches, the
warning sign for the protection of children should be affixed.
On the back of the push button there are two screw terminals
(1 & 2). The insulation is stripped up to about 6 mm from the bell wire
(4). Pull apart wires far enough from each other so that it is possible to
connect the white/red wire to a screw terminal (1) and the white wire to
the other screw terminal (2).
Illuminated wall switch: Mount on an inner wall of the garage using the
supplied sheet metal screws (3). For dry or concrete walls, pre-drill
holes with 5 mm diameter and use dowels. It is recommended to un-
dertake the assembly next to the garage side entrance out of reach of
children. Tighten both screws carefully and do not tighten too much to
avoid damaging the plastic housing. Run the bell wire along the wall
over the ceiling up to the door opener. Attach the wire using nailing
clips. Run bell wire from the top through the cable duct to the terminal.
The terminals are located in the recess next to the programming
switches. Connect bell wire to the terminals 1 + 2
8.2

Connecting the opener

Connect opener in accordance with local rules and regulations to
a properly installed earthed wall socket.
NOTE:
When the opener is switched on, the operator light is also turned on
briefly.

Program opener and test

9
The door opener should only be used if the operator can see
the entire door area and is assured that it is free of obstacles
and the door opener is set correctly. No one may pass through
the door while it is moving. Before the first opening operation, check
that all the facilities that are not needed are turned off. Remove all
mounting aids and tools from the pivot area of the door.
9.1

Adjust limits and force

1. Open light cover.
2. Press „P" and hold it until LED3 starts flashing (1).
3. Press „+" and hold it until the door is completely open (2).
If neccessary adjust using „-".
4. Press „P" briefly, LED2 starts to glow (3).
5. Press „-" and hold it until the door is completely closed. The rail must
not bend up (4). If neccessary adjust using „+".
6. Press „P" again briefly. The drive now automatically opens
the door completely and then closes the door completely (5).
During this process the force required by the opener is set.
NOTES:
Do not interrupt the opener during this process otherwise you have to
repeat the whole procedure. In case the door pushes against the door
frame and reverses, the „closed" limit hasn't been set properly.
Repeat limit setting and make sure the rail doesn't bend whe setting
the „closed" limit.
Force adjustment:
Possibility 1: When installing the opener the travel (distance between
the Open and Closed position) and the optimal pulling force is learned.
Possibility 2: Cut the opener from mains supply for approx.
10 seconds. Then open and close the door via remote control or wall
switch.
NOTE:
Before any modification to the force adjustment check the door for
proper functioning.
The opener is no support for a malfunctioning door. You can check
proper functioning by releasing the opener and opening and closing
the door manually.
9.2

Test the Safety Reverse System

The safety reverse system test is important. Garage door
must reverse on contact with a 50 mm obstacle laid flat
on the floor. Failure to properly adjust opener may result
in serious personal injury from a closing garage door. Repeat test
once a month and adjust as needed.
OBSTACLE TEST:
Place a 50 mm high obstacle (1) under the garage door on the floor.
Move door downwards. The door must reverse when it comes into
contact with the obstacle. If upon contact the door stops, the door
does not move down far enough. In this case repeat limit setting
(see 9.1).
If the door reverses after contact with the 50 mm high obstacle,
remove obstacles and open and close the door completely once.
The door should not go back, if it reaches the door position „Closed".
If it still reverses both limits must be reprogrammed (see 9.1).
OPENING TEST: Apply 20 kg to the middle of the door.
The door should not open.
5

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