003-001 PowerAssist Installation
Page 17 of 24
Rev. 0–27APR07
3. Adjust the turnbuckle on the onstage side of the drive line until all slack is removed from
the drive chain.
4. Use iron wire to mouse the turnbuckle and prevent unintentional rotation.
NOTICE
Connect the chain to the bottom of the arbor with the arbor in the down
position and the full system imbalance capacity of the hoist on the chain in order to
minimize re-tensioning required after “break in”.
10. Set the Limit Switches
Set the limit switches for the hoist using the procedure in Appendix A.
11. Install arbor weight warning signs
WARNING!
INCORRECT COUNTERWEIGHT CAN OVERLOAD HOIST AND
CAUSE LOAD TO FALL. SECURE COUNTERWEIGHT AND INSTALL WARNING
SIGNS TO PREVENT USERS FROM TAMPERING WITH WEIGHTS
Install the warning sign securely onto the arbor rods in such a way as to prevent the addition
or removal of weight.
WARNING!
FOR SYSTEMS WITH A BATTEN CAPACITY GREATER THAN
2000 LBS REMOVAL OF WEIGHT FROM EITHER THE BATTEN OR THE ARBOR CAN
RESULT IN OVEROAD OF HOIST. THE SYSTEM INSTALLER MUST ATTACH SAFETY
WARNING LABELS ONTO THE LOAD AT THE POINT OF ATTACHMENT TO
PREVENT USERS FROM REMOVING THE LOAD AND OVERLOADING THE HOIST.
12. Chain tension adjustment after break in
The drive chain will go through an initial “break in” period which will result in significant slack
developing in the chain as it runs. The turnbuckle must be adjusted as this occurs to ensure
safe operation. The owners must be notified of this condition and steps taken to make sure
the chain is adjusted properly.