Chamberlain LiftMaster PROFESSIONAL BAS300K Mode D'emploi page 18

INSTALLATION OF THE TELESCOPIC DOOR ARMS
(OPTIONAL)
Whether the bent or straight telescopic door drive arms are used
depends on the amount of space available at the side (Fig. 9). Where
the drive arm is attached to the frame depends on the door type and the
amount of mounting space available. As close as possible to the point at
which the door turns (swings) is ideal. This attachment should be welded
to be as stable as possible since high forces are transferred to it.
1. Straight telescopic arms operate alongside the door arms which turn
the door (the arm which turns the door does not cross the path of the
telescopic drive arm). There is sufficient space on the door frame to
fix the drive arms to the side, top or bottom.
2. Bent telescopic arms are fitted over the door arms which turn the door
and are attached if insufficient space is available at the side to avoid
contact.
Both types of telescopic arm may only be pulled out to 80% of their full
path (max. length 120 cm). In the case of small doors it may be
necessary to shorten the telescopic arms.
The telescopic arms must be lubricated before assembly so that they
function smoothly.
Once the side telescopic arms are mounted the exact length of the
revolving rods can be established. On the telescopic arms are sleeves
which are pushed into the revolving rods. If desired this connection can
be secured by drilling through and using 10 mm pins or a welded
connection is also possible. The last option is by far the most secure
connection.
ADJUSTMENT OF THE BALANCE OF THE DOOR
Following mechanical installation it is necessary to check whether the
up-and-over door is still in equilibrium after increasing the weight of the
drive and the accessories. If necessary counterweights or torsion
springs should be used to regain equilibrium. Optimum swivelling is
guaranteed if the door remains in the medium position (45°) and is in
equilibrium with the drive unlatched. Furthermore it should be ensured,
by manually moving the door, that when opening and closing it the swing
takes place linearly and without any jumps or abrupt movements.
LIMIT SWITCH ADJUSTMENT (BAS300K ONLY)
The limit switches are located to the right of the drive beneath a black
plastic cover. By removing the 4 screws (Phillips, PZ1) the cover can be
removed. The limit switches are triggered by 2 cams which can be
adjusted on the shaft with a little force or by a screwdriver. The limit
switch position determines the points "DOOR OPEN" and "DOOR
CLOSED".
By turning the cams the switch-off point can be adjusted in both
directions.
Setting for single motor operation (drive mounted centrally):
The outside limit switch is the one for DOOR OPEN.
The inner limit switch on the motor is DOOR CLOSED.
Setting for double motor operation (drives to the right and left):
If the drive is mounted with the limit switch RIGHT the adjustment is
made as described above.
709304D-GB
INSTALLATION OF DRIVE COVER
The drive cover is fixed at the side with 4 screws. Before positioning the
drive cover the plastic thread inserts must be pushed into the door
strengthening rails at the appropriate height. Before the cover is pushed
on from the front, the screws should be given another turn.
EXCHANGING BULBS
Warning: Isolate drive from mains.
The plastic cover is screwed on at the side and after removing 2 screws
on the left and 2 on the right it can be pulled downwards.
The transparent light cover underneath is fixed with 4 Phillips screws
(PZ1) and after they have been removed it can be lifted off. The bulb is
seated in a screw holder, type E14/25W.
Never use stronger bulbs. After exchanging the bulb reassembly takes
place in the reverse order. Pay attention to the sealing fitting around the
transparent light cover, which must be properly positioned.
Bulbs are not subject to guarantee claims.
LATCH / UNLATCH DRIVE
If the drive is unlatched the door can be opened or closed by hand.
If the drive is locked the door can only be operated with the drive.
Unlatching:
In a recess at the back of the plastic cover is an unlatching key. Take it
out and push it into the marked opening which is also on the back of the
drive. By turning it clockwise through about 180° the drive is unlatched.
Latching:
With the unlatching key pushed in turn it clockwise until you feel a solid
resistance. Then move the door a little by hand until you hear it click or
you can establish that the door is latched again.
If 2 drives are mounted on the door both of them must be unlatched and
latched.
If the garage has no external access it is necessary to mount an
external unlatching system for the situation when the drive is without
power.
Functionality of the emergency unlatching system (see Fig. 24D).