9
2. Lock the drive and driven sprockets in place by inserting the keys and tightening their respective set
screws.
3. Connect the sprockets with the drive chain, shorten to a suitable length and join together with the chain
link provided in the hardware bag. To shorten the chain, punch out the pin that will leave an inside link
nearest to the desired length. Connect the chain around the sprockets using the chain link (Figure 9).
Figure 9
Chain link
4. Slide the operator to tighten the drive chain and then firmly tighten the mounting bolts. Check the
tension on the chain and the set screws on the sprockets (there should be no more than 1/4" slack
when chain is depressed between sprockets
5. Opera-MH: run hand chain through the pocket wheel and through the chain guide outside the frame
(Figure 10A), allow both ends to hang down toward the ground and cut hand chain, if necessary, so
that both ends are approximately 2 feet (0.6 m) from floor. Connect both ends of hand chain.
6. Opera-MJ: link the disconnect chain at the key ring or hook located at the extremity of the disconnect
pull cable (Figure 10B) Place the Opera-MJ chain keeper so that, when pulled and engaged, the
disconnect chain keeps the machine ‘’disconnected’’ and in the manual position.
CAUTION
BEFORE PULLING HAND CHAIN THROUGH POCKET WHEEL OR LIFTING THE DOOR DIRECTLY BY HAND,
PULL CAM PLATE AND SPIN CAM NUTS TO CENTER OF LIMIT SHAFT SO AS TO BE SURE THE CAMS ARE
NOT BEING MECHANICALLY DRIVEN THROUGH THEIR NORMAL LIMIT SWITCH END POSITIONS.
Figure 10
A.
Installing hand chain on Opera-MH
Keyring
or
Hook
Figure 10 B.
Installing disconnect chain on Opera-MJ
