Installing The Door Mount Bracket; Installing The Link Arm; Testing The Mechanical Drive And Linkage - E.T. Systems DC BLUE ADVANCED Installer's Instructions

ET DC BLUE ADVANCED INSTALLER 2012.025.12.05.2014
INSTALLING THE DOOR MOUNT BRACKET (See page 5 for component identification)
Mount the door mount bracket on the inside fascia of the door as shown below. Keep it as in line as
possible with the top guide rollers and centred from side to side of the door.
NB!!! The door mount bracket is one of the components that will take the majority of the load in a garage
door automation system. Extra care needs to be taken to ensure that the bracket is securely fastened.
Whatever the bracket is fastened to, must also withstand a force equal to the force of the door when the
spring balancing of the door is removed. For example if a balancing spring snaps.
INSTALLING THE LINK ARM (See page 5 for component identification)
Close the door fully. Install the curved link arm extension in the door mount bracket using one of the cotter
pins and 25mm long pivot pins supplied. Next using the other 25mm long pivot pin and cotter pin, install
the straight link arm in the traveller/sledge that has been moved all the way to the front of the drawbar.
Finally bolt the curved extension to the straight link arm, so that the two combined form the same angle as
shown below.
This method provides better positive locking of the door in the closed position than the commonly used 45⁰
angled link arm. This method also produces less backward force on the gearbox when trying to compress
the seal at the bottom of the door as the downward force is generated by the link arm camming up and
over the door.

TESTING THE MECHANICAL DRIVE AND LINKAGE

It is now possible to test the mechanical movement of the door with the link arm attached and the
sledge/traveller engaged onto the chain drive. The movement of the door throughout its travel should be
approximately the same while pulling the chain around the drawbar, as it is when the chain is not
engaged.
If satisfied that the drawbar is not causing unnecessary drag or hindrance to the door movement, then go
ahead and attach the motor-head to the drawbar. (Page 11)
8
www.et.co.za