Overhead door SilentMax 4040 Manual Del Usuario página 6

Check Step 3:
Measure garage door height (7'-6", 8'-0", or taller) with
tape measure.
A
If door height is 7'-6" or less, continue with Check Step 4.
B If your door height is above 7'-6", you may need a channel
extension kit (Figure 3). If there is any question contact your
Customer Service Representative at 1-800-784-5028 .
Check Step 4:
The header is a heavily reinforced section of the wall just
above the top of the garage door opening.
A Find vertical center line of door and header:
• Close door.
• Measure door width at top.
• Mark a point at center of door and on header directly
above door. Draw a center line to connect points.
B Find Header Bracket mounting height (Figure 4):
(Do not attach Header Bracket).
• Raise door, watching top edge of door and stop door
when its edge reaches its highest point.
•
Measure distance ("H") from top edge of door to floor.
– For sectional doors, add 2-1/ 2" to "H" . Mark a point
on center line. Bottom of Header Bracket will be
installed here.
– For one-piece doors, add 6" to "H" . Mark this point on
center line. Bottom of Header Bracket will be
installed here.
• For both types of doors:
– If the ceiling in your garage is so low that there is
not at least a 3" space above the Header Bracket
mounting point, contact a Overhead Door Factory
Authorized Dealer.
•
If a door spring is in the way, place the Header
Bracket above the spring. Do Not move the door spring.
Door springs are under extremely high tension and should be
handled ONLY by a trained professional.
C Check wall for a stud or a solid header at your mark:
(If checking a finished wall, a stud finder may be helpful).
• If location is above Header, a 2" x 6" board must be
screwed to studs beside your mark with at least two Lag
Screws and Flat Washers (not provided).
• Transfer your mark to new mounting board.
6
M G D
EASURE ARAGE
C D H
HECK OOR EADER
NOTE
NOTE
WARNING:
H
OOR EIGHT
A
REA
Header
Header
For Help, call 1-800-784-5028 or visit www.overheaddoor.com
Figure 3 Channel Extension Kit
SECTIONAL DOOR
H + 2 1/2"
H
ONE-PIECE DOOR
H + 6"
H
Figure 4 Find Highest Point of Travel
Channel
Extension
for 8' door