LiftMaster T Industrial-Duty Trolley Operator for Standard Lift Sectional Doors - Manual (Page 2)

QuickStart
IMPORTANT: This QuickStart is intended to highlight a typical installation. These instructions are not intended to he comprehensive. Because each application is unique, it is the responsihility of the purchaser,
designer, installer and end user to ensure that the total door system is safe for its intended use. Please consult the manual and/or a qualified technician for further information.
Typical Mid-Span
Support Bracket
(Not Provided)
for the model T door operator
Inside the Electrical Box
^Limit Switches Ol15 V PH. 1 Power Connection
^iT NEC
Direction Limit Nut Wiii Move During Travei POWER WIRING
USE COPPER WIRE ONLY
14 AWG Minimum
Follow ALL local electrical codes
O Install the spacer brackets evenly down the track. The nylon pad on the spacer bracket must face up. (Two -1" bolts/nuts per spacer)
o Install the idler wheel assemhly ln the second hole from the end of the track. (Two -1" bolts/nuts with lock washers)
©Slide the trolley carriage into the tracks so that the take-up holtmW be facing toward the powerhead.
OSscure the powerhead to the tracks using the L-slot and the 3rd hole for each track. (Four -1" bolts/nuts)
0 Connect the chain to the trolley carriage connection on the door end. Connect the take-up holt on the other end and adjust chain accordingly. A properly adjusted chain will sag
about 3" at the mid-point. If necessary, remove links from the chain to achieve proper adjustment. (Two nuts and a lock washer, two master links)
o Provide a mounting pad for the header bracket to attach to the front wall. Then use the pivot shaft and cotter pins to secure the track assembly to the header bracket (with the
powerhead remaining on the floor).
OSscure some mounting brackets to the powerhead. Pivot the powerhead up until track assembly is horizontal with the header bracket then secure the brackets to the ceiling.
If the track is longer than 15', use of a mid-span support bracket is recommended.
©Assemble the curved and straight arm as shown making sure the open side of the notch on the straight arm faces the door, (Two -1" bolts/nuts). Attach arm assembly to the
door bracket with a 1" bolt and nylon locking nut so the bolt can pivot.
©Run the power wires through the power wiring conduit hole in the electrical box enclosure. Connect the power to the operator. Connect the earth ground to the chassis ground
screw in the electrical box enclosure. Follow ALL local electrical codes.
©Adjust the limit switches to open and close door properly. Make sure the limit nuts are positioned between the limit switches before proceeding with adjustments.
0 Remove cotter pin from nut on the clutch shaft. Back off clutch nut until there is very little tension on the clutch spring. Tighten clutch nut gradually until there is just enough
tension to permit the operator to move the door smoothly but to allow the clutch to slip if the door is obstructed. When the clutch is properly adjusted, it should generally be
possible to stop the door by hand during travel. Reinstall cotter pin when finished.
0 Radio programming and troubleshooting instructions inside cover of operator.
01-30942B
© 2005, The Chamberlain Group, Inc
All Rights Reserved
Powerhead