JACKSHAFT MOTOR-CONTROL SYSTEM
FOR
RESIDENTIAL GARAGE DOORS
Model 815-RL Installation Instructions
The Zap Controls’ range of
The Zap
The control unit monitors the motor load and interprets a sudden increase in load as either an obstruction or the limit of door travel.
A significant advantage of the Zap drive system with its fast obstruction sensing, is that when an object obstructs the doors travel, the cables should never jump off the cable drums.
The motor is controlled with a very soft start to minimise any tendency for the counterbalance cables to slacken during the start of the close cycle when the door is operated without buffer springs.
It is possible for the door to be operated without buffer springs, even on a low headroom door with a
Pic 1
It is preferable to set the overhead track angle at a gradient above horizontal to increase the influence of gravity on the initial movement of the door in the close direction. If there is any indication of the door resisting movement under the influence of gravity then it may be preferable to fit a set of buffer springs or leaf springs at the fully open track position to provide an initial push to start the door moving. (Pic 1)
The Controller will sense the open position of the door when the counterbalance cables are pulled tight at the radius of the track. (Pic 2)
Pic 2
The model
2
