Merlin Powerlift User Manual page 9

STEP 11: Locate a ceiling joist in the area
where the straps will attach to the
ceiling. If you have a finished plas-
ter or wallboard ceiling, you may
have difficulty locating the joists. Try
either of these methods:
• Look for indications of the nails
that hold plasterboard to joists. You
may be able to locate nail positions
by imperfections in the joint com-
pound or by using a magnetic stud
detector.
• Drill pilot holes every inch until you
find a joist. Joists may run
lengthwise or across the ga-
rage, so search in both direc-
tions. To fix the ceiling after you
locate the joists, fill the holes
and repaint.
STEP 12: Before attaching the straps to
the joists, set the level of the
opener. Check that the door
does not hit the pole when manually open-
ing and closing. Allow a minimum of 25 mm
clearance between the top edge of the door
and the bottom of the pole.
STEP 13: Fasten the straps solidly to the joists. You can
fasten straps directly to joists with lag screws or
use the piece of angle iron to bridge between joists.
Fasten the straps to the angle iron with 1/4 inch
machine screws and lock nuts from the hardware pack.
STEP 14: When the power head is securely mounted, remove any
wood scraps or tools you
have left on the open
door. Close the door
manually.
STEP 15: Attach the door
bracket to the
door. For
wood door you
will need the
door bracket, drill,
two x 2 inch carriage bolts,
/
1
4
Top of door
Door
bracket
a
Centre line
of door
inch drill bit,
/
1
4
Attaching the return pulley assembly
to the header bracket
Move until
Centre line of pole to line up with
pole lines up
with door
centre mark
Top of door
Door Bracket mounting
9
Clevis pin & clip
Door closed
Protective cardboard
centre line of open door
Mounting
methods
Top of
door
Door
bracket
Angle iron
strap
100mm