Attach The Cable Tension Monitor (Required) - LiftMaster DDO8900W Manual Del Usuario

Installation
4

Attach the Cable Tension Monitor (Required)

NOTE: The cable tension monitor is shipped for left side installation. It is recommended
that the cable tension monitor be installed on the same side of the door as the door
operator. For right side installation, remove the snap-ring holding the roller in place and
reassemble it on the opposite side of the cable tension monitor.
1. Make sure the door cable is approximately 3/4" (19 mm) from the mounting surface.
Door adjustments or shimming may be required to achieve proper depth for the door
cable.
2. Position the cable tension monitor no more than 6' (2 m) above the door opening,
and be sure the roller extends 1/8"-1/4" past the cable. Make sure cable tension
monitor is located over a wood support member and the roller is free from any
obstructions.
NOTE: There must be no obstructions in the installation area that prevent the cable
tension monitor from closing completely when slack is detected.
3. Mark and drill 3/16" pilot holes for screws (pilot holes are not required for anchors).
4. Attach the cable tension monitor to the wall using the hardware provided. Make sure
that the roller is on top of the cable.
5. Run bell wire to door operator. Use insulated staples to secure wire.
6. Connect bell wire to the green quick-connect terminals on the door operator (polarity
is not important).
NOTE: Cable must have tension through entire door travel. Make sure there is no
slack in cable on opposite side of door during normal operation. If slack occurs
during door travel, adjust cables as required.
A second cable tension monitor may be installed for additional security. When two cable
tension monitors are installed, the door will not move in the down direction or will reverse
if one of the monitors detects slack or is disconnected.
If one of the cable tension monitors is removed, unplug both monitors from the operator.
Then plug in the monitor you wish to use and unplug and plug in the operator three times
to relearn the monitor to the operator.
To insert or
release wire,
push in tab with
screwdriver tip
WHT/
GRN
4 5 6 7 8 9 10 11 12 13 14
(To door operator)
Drum
Cable
1/8"-1/4"
(3-6 mm)
(To cable tension monitor)
Door Closed
Cable
Tension
Monitor
Cable Tension
Monitor Roller
10
The cable tension monitor MUST be
connected and properly installed before
the door operator will move in the down
direction.
The cable tension monitor detects ANY
slack that may occur in the cables and
will reverse the door, eliminating service
calls.
HARDWARE
Screw
14-10x2" (2)
Screws
#8-32x1" (2)
Door Open
Drum
Wall
Approx. 3/4"
(19 mm)
Cable Tension
Monitor Roller
IMPORTANT:
Roller must be
placed no more
than 6' (2 m)
above door
opening
The position of
the cable
tension monitor
will vary
depending on
the type of door
and drum used.
Drum
Approx. 2.5"
(63.5mm)