Chamberlain HJ Owner's Manual page 4

4. Place drive sprocket on appropriate side of
operator. Do not insert key at this time.
5. Position roller chain over door sprocket and join
ends together with master link.
6. Raise or lower operator until the chain is taut (not
tight) as in Figure 4. Mark slotted holes to match
operator frame.
If drive sprocket is ABOVE door sprocket, drill
hole at the top of each slot.
If drive sprocket is BELOW door sprocket, drill
hole at bottom of each slot.
Placement of the drilled holes will allow for chain
adjustment if necessary.
7. Make sure operator output shaft is parallel to door
shaft and sprockets are aligned. When in position,
secure operator with 3/8" bolts or concrete anchors
as required.
Installation of Operator
to Sectional Door
Make-up Box
(Not Provided)
Take-up Reel
(Optional)
Coil Cord
(Optional)
Air Hose
Reversing Edge
FOR OPERATORS WITH CHAIN HOISTS
8. Place hand chain through eye bolt guides and
around pocket wheel. Remove enough links so
chain hangs approximately four feet above floor.
9. Uncoil disconnect cable and fasten chain keeper to
the wall of building as shown in Figure 6. Adjust
disconnect cable handpull and fender washer so
chain keeper holds cable in position when cable is
pulled as far as its travel permits.
(Metal Building)
Wire (24V)
Pneumatic Air Switch:
Not required or supplied
when electric sensing
edge is used
Installation of Operator to
Standard Rolling Steel Doors.
REEL (OPTIONAL)
Take-up reel should be installed 12" above top of
door.
COIL-CORD (OPTIONAL)
Connect operator end of coil cord to junction box (not
supplied) fastened to the wall approximately halfway
up the door opening. (See Figure 5)
Electrician must hardwire junction box to the operator
electric box in accordance with local codes.
Chain Keeper
Handle
4
Operator Supplied
Door Sprocket
2" x 2" x 3/16"
Angle Iron Brace
FIGURE 4
Cable
FIGURE 6