OPERATION & ADJUSTMENT INSTRUCTIONS
14
CLUTCH ADJUSTMENT
The clutch serves to protect the door, the electric operator and
other equipment from undue stress or damage caused by starting
forces and/or an obstruction to the door. It should be set no
tighter than is necessary to smoothly and consistently move the
door throughout its full range of travel. When properly set, it will
slip freely if the door should encounter an obstruction, and it
should be possible to stop the travel of the door by hand.
WARNING:
Before adjustment remove power to the
operator.
To adjust the clutch, loosen the jamb nut,
,
and turn the adjusting
nut, as shown at right Make adjustments in 1/4 turn increments.
Always re-tighten the jamb nut before running the operator to
prevent clutch from changing its setting.
CAUTION
NEVER COMPRESS CLUTCH SPRING BEYOND
POINT LIMITED BY THE DESIGN OF THE
OPERATOR OR REPLACE IT WITH A
HEAVIER SPRING
Due to changing conditions of the door and normal wear, it may
be necessary to occasionally readjust the clutch to obtain
dependable operation.
WARNING: BEFORE DOING SO BE CERTAIN THAT
THE DOOR IS IN GOOD WORKING CONDITION,
PROPERLY COUNTERBALANCED AND THAT THE
CLUTCH IS NOT SLIPPING BECAUSE OF LOOSE OR
MISSING HARDWARE, BINDING IN THE TRACK,
RUBBING AGAINST THE DOOR STOPS OR DEFECTIVE
OR MISADJUSTED SPRINGS. ANY SERVICE
REQUIRED TO THE DOOR, DOOR SPRINGS OR DOOR
OPERATOR MUST BE PREFORMED BY A QUALIFIED
PROFESSIONAL DOOR INSTALLER.
The clutch pad will wear during normal operation and should be
replaced when it becomes difficult or impossible to sufficiently
tighten the clutch to obtain smooth operation of the door when it
is in good working condition. To replace the clutch pad, first
loosen the motor mounting bolts and remove the V-belt then the
clutch adjusting nuts, spring and clutch pulley. Check condition
of V-belt before reassembly and replace if required. After
reassembly, adjust clutch as described above.
IMPROPER ADJUSTMENT OF CLUTCH
SETTING COULD CAUSE ENTRAPMENT,
INJURY OR DEATH.
SET CLUTCH ADJUSTMENT FOR JUST
ENOUGH FORCE TO OPERATE THE DOOR
RELIABLY, BUT NO STRONGER. Contact a
service professional to correct any binding,
sticking or other door problems. DO NOT
OVER-ADJUST CLUTCH SETTING TO
COMPENSATE FOR A POORLY WORKING
DOOR.
WARNING
107101
RISK OF ENTRAPMENT THAT MAY RESULT
IN SERIOUS PERSONAL INJURY OR DEATH.
DISCONNECT POWER TO THE OPENER
BEFORE SERVICING OR MAKING
ADJUSTMENTS. ENSURE DOORWAY IS
CLEAR BEFORE STARTING TESTING OF UNIT.
WARNING
ALWAYS DISCONNECT POWER TO
OPERATOR BEFORE SERVICING OR MAKING
ADJUSTMENTS.
CAUTION
Figure 13
