344940 REV2 03/17/2020
©
Copyright 2020 Wayne Dalton, a division of Overhead Door Corporation
17
IMPORTANT:
TENSION IS APPLIED IN THE DIRECTION AS THE SHUTTER WOULD TURN AS IT COILS UPWARD (OPPOSITE THE DIRECTION OF THE ARROW ON THE “REV
TAG”).
Hint: If conditions permit, use wall as brace for winding bar for a safe procedure of installing the AW pin as shown.
NOTE:
Apply the initial revolutions (IR’s) marked on the rev tag and installation drawing. The IR’s are the required number of turns (of the spring) to hold the curtain in the
open position.
While holding the winding bar firmly in one hand, insert the AW pin with the other hand
through the lug in the bracket and into the hole in the AW to lock the AW at the specified
number of revs. Remove winding bars.
IMPORTANT:
APPLY ONLY ENOUGH TENSION TO HOLD THE SHUTTER IN THE UP POSITION
AGAINST THE BOTTOM BAR STOPS. THIS IS THE OPTIMUM SETTING, AS TOO MUCH TENSION
COULD PREVENT THE SHUTTER FROM DROPPING WHEN THE RELEASE LEVER OR FUSIBLE LINK
IS ACTIVATED.
STEP 9
TESTING THE SHUTTER BALANCE (Manual Lift-Up, Crank, GCX Motor Operator Only)
With the adjusting wheel locked, operate the shutter through several cycles to check shutter balance. If the shutter does not balance properly and requires further spring
adjustment, repeat the procedure for “Applying Tension” to add or remove spring tension. Ideally, the shutter should have sufficient spring tension to just allow the shutter to
stay up in the open position and no more.
WARNING
EXERCISE CAUTION WHEN APPLYING OR ADJUSTING SPRING TENSION. CONTACT WITH RAPIDLY ROTATING ADJUSTING WHEEL OR EXPELLED WINDING BAR CAN CAUSE
SERIOUS INJURY OR DEATH. USE TWO (NOT PROVIDED) WINDING BARS 1/2” DIAMETER STEEL ROD, MINIMUM 18 INCHES LONG.
CAUTION
INCREASING THE INITIAL TENSION WILL REDUCE THE LIFT EFFORT BUT CAN PREVENT AUTOMATIC CLOSURE WHEN REQUIRED TO DO SO UNDER ACTUAL FIRE
CONDITIONS. DO NOT OVERWIND.