Intended Use; Scope Of Supply; Product Overview; Before You Begin - Chamberlain LM50 Assembly And Operating Instructions Manual

2

Intended use

The device is intended for the opening and closing of tilt-up and
sectional garage doors in the private sector. The device is not meant
for commercial use but solely for the use in private garage doors that
are appropriate for a single household.
Any improper use of the drive could increase the risk of accidents.
The manufacturer assumes no liability for such usage.
3

Scope of supply

Please check the supplied parts for completeness before starting the in-
stallation.
Note: The numbering only applies to the corresponding section.
Parts overview:
1. Drive head
2. Handheld transmitter
3. Curved door arm
4. Support bracket
5. Mounting bracket
6. Header bracket
Hardwarebag:
1. Truss head screw
6 x 80 mm
2. Lock nut M6
3. Hexagonal head screw
4. Nut M6
5. Bolt
4

Product overview

This figure always offers you a complete overview of the ready-
assembled system during the step by step installation of the system.
1. Header bracket
2. Chain
3. Rail
4. Carriage
5. Connecting piece
6. Mounting bracket
7. Support bracket
5

Before you begin

IMPORTANT NOTE
If your garage does not have a side entrance, an external emergency
release should be installed. This allows for manual operation of the
garage door from the outside during power failure.
5.1

Preconditions

The garage door opener is suitable only for installation in one-piece
garage doors with horizontal guide rail (tilt-up door) (Fig. A) and in
sectional doors with curved guide rail (Fig. B).
NOTE:
The system cannot be used for one-piece garage doors with horizontal
and vertical guide rails and two-wing doors or overhead doors.
7. Door fixture
1x
8. Accessories bag
2x
9. Rail
1x
Note: Illustration shows basic content.
Depending on the exact model or com-
2x
bination purchased contents are differ-
3x
ent.
1x
6. Safety cotter pin
1x
7. Screw
ST6 x 50 mm
1x
4x 8. Screw
ST6,3 x 18 mm
4x
9. Plug
1x
8. Power cable
9. Drive head
10. Release
11. Straight door arm
12. Curved door arm
13. Door bracket
5.2

Preparation

First, check whether your door is balanced and in equilibrium. Open
your door about halfway and let it go.
The door can now hardly change its position independently, but must
remain in this position held by the spring force alone.
Motive force: maximum 15 kg.
1. The rail of the garage door MUST be connected securely and firmly
to the supporting wall or ceiling above the garage door.
2. Additional brackets and mounting rails (not included in the supply)
might be required, if the your garage ceiling has a cladding, boards or
similar.
3. If your garage does not have a separate side entrance, an external
emergency release should be installed.
1x
5.3

Tools required

1x
Tool list:
1x
Ladder
Marking pen
Pliers
Drilling machine
Hammer
Ratchet
1x
4x
6

Assembly of the door opener

8x
Important instructions for a safe installation.
Observe all assembly instructions.
4x
Incorrect installation can cause serious injury.

Assembling the rail

6.1
The rail is largely preassembled and consists of 3 parts. The carriage,
push rod, release handle, the guide pulley and the lintel bracket with
chain tensioner are in the front part (A). The seating for the drive shaft
and the sprocket are in the rear part (B). Lay the front and rear rail
sections one behind the other.
1. Remove cable ties that secure the chain. Leave the transport lock
(X) still in position.
2. Pull apart the two rail sections completely in order to create a gap
for the middle section (C). This rail is designed in such a way so as
to easily add the middle section. Slide the 2 connecting pieces (D)
over the seams of the rail sections up to the markings. To secure
the connecting pieces, bend the sheet metal lugs out-wards with a
suitable tool.
The assembly of the rail is complete.

Tighten the chain

6.2
Tighten the chain of the rail until the spring (1) is compressed only by
about half.
This must be able to bounce during operation.
Hacksaw
Different drill bits
(8, 6, 5, 4.5 mm)
Box wrench
Water level
Screwdriver
Measuring tape
en 03/09