Lift-Master 65 5207 User Manual

SLOW SPEED DOOR

MODIFICATION

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AANNDD

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BELT DRIVE OPERATORS - 655207 APPLICATION

This modification is available for Model T and SD standard door operators with 24V control circuits (M) and logic control board (L). Must be factory installed.

FUNCTIONS

Required on belt drive trolley or slide door operators to slow the door speed down from 1 ft./sec. to about .6 ft./sec. Necessary on one-piece doors. A third sprocket/chain reduction is provided in the powerhead.

GEAR REDUCED OPERATORS - 6552071 APPLICATION

This modification is available for Model GT and GSD standard door operators with 24V control circuits (M) and logic control board (L).

FUNCTIONS

Required on gear reduced trolley or slide door operators to slow the door speed down from 1 ft./sec. to .6 ft./sec. Necessary on one-piece doors. The speed reduction is achieved within secondary reduction of the operator. The operator powerhead is mounted in the normal manner.

NOTE:

The slower door speed allows a proportional increase in door size for the same horsepower model. With this modification a

1/2 HP will operate the same size door as a 3/4 HP will at normal speed.