Adjustment - Chamberlain merlin MT5580P Installation And Operating Instructions Manual

23
ADJUST THE TRAVEL LIMITS
Limit adjustment settings regulate the point at which the
door will stop whilst moving up or down.
To set the limits:
Ensure the door is in the CLOSED POSITION and the trolley
is engaged (see page 11)
• Turn power on
• Open the door by pressing either of your pre-programmed
transmitters or wireless wall button.
• Run the opener through a complete travel cycle.
NOTE: Repeated operation of the opener during adjust-
ment procedures may cause the opener thermal protec-
tion to shut the opener down. If this occurs please wait 15
minutes and try again.
TIP: For larger doors it maybe necessary to disengage the opener to
adjust the openerʼs limits without the door attached. Re-Engage the
door and fine tune limits once the travel has been roughly adjusted.
Adjusting the limits:
The door should open a minimum of 1.5m from the CLOSED posi-
tion. If door travel less than 1.5m Adjust the FORCE SETTINGS as
outlined in section 24 then return to Setting Limits.
To increase the open travel limit, turn the UP limit adjustment screw
(1) clockwise (one turn = 50mm of travel).
To adjust the door closure adjust the DOWN limit adjustment screw
(2) anti-clockwise (one turn = 50mm of travel). The door should close
firmly against the floor without placing back pressure on the door
arm, pole or door fittings.
If the door fails to close firmly to the floor with the down limit adjusted fully, it may be necessary to increase the length
of the door arm (see page 20 or 21 depending on your door type). If the door reverse on contact with the floor you will
need to reduce the DOWN limit by turning the screw clockwise.
FORCE ADJUSTMENT
24
The force, as measured on the closing edge of the door, should not exceed
400N (40kg). If the closing force is measured to more than 400N, the Protector
System must be installed.
The force setting button is located on the back panel of the opener. The force
setting regulates the amount of power required to open and close the door. If
the forces are too light, door travel may be interrupted by nuisance reversals.
Locate the button (1) on the back panel of opener. Push the button twice to
enter into Force Setting Mode. The LED (Indicator Light) will flash. Push the
wall control or the programmed transmitter that was shipped with your opener.
The door will travel to either the OPEN or CLOSE position. Push the button
again, the door will travel to the opposite position. Push the button again if the
LED is stilling blinking.
The door must travel through a complete cycle UP and DOWN in order for the
force to be set properly. If the opener reverses before it reaches the Open or
Close Limit repeat the process. The LED (indicator light) will stop flashing
when the force has been learned.
ADJUSTMENT SECTION
Without a properly installed safety reversal system, persons
(particularly small children) could be SERIOUSLY INJURED or
KILLED by a closing garage door.
• Incorrect adjustment of garage door travel limits will
interfere with proper operation of safety reversal system.
• If one control (force or travel limits) is adjusted, the other
control may also need adjustment.
• After ANY adjustments are made, the safety reversal system
MUST be tested. Door MUST reverse on contact with 40mm
high object on floor.
To prevent damage to vehicles, be sure fully open door
provides adequate clearance.
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