Chamberlain 1245R garage door opener

User Manual - Page 5

For 1245R.

PDF File Manual, 40 pages, Download pdf file

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Planning (Continued)
ONE-PIECE DOOR INSTALLATIONS
Generally, a one-piece door does not require
reinforcement If your door is lightweight, refer to
the information relating to sectional doors in
Installation Step 11
Depending on your door's construction, you may
need additional mounting hardware for the door
bracket (Step 11)
Without a properly working safety reversal system,
persons (particularly small children) could be
SERIOUSLYINJUREDor KILLEDby a closing garage
door.
Thegap betweenthe bottom of the garage door and
the floor MUSTNOTexceed1/4" (6 mm). Otherwise,
the safety reversal system may not work properly.
Thefloor or the garagedoor MUSTbe repairedto
eliminate the gap.
ONE-PIECE DOOR WITHOUT TRACK
Header
_ _ Gap between floor
and bottom of door must
Safety Reversing not exceed 1/4" (6 mm)
Sensor
Slack in chain tension
is normal when
garage door is closed.
FINISHED CEILING
Support bracket
& fastening
hardware is required.
See page 17.
O
Safety Reversing
Sensor
Motor Unit
CLOSED POSITION
Chain
Pulley Bracket Trolley
Straight
Door Door
Arm Arm
Garage
Door
Emergency
Rope
& Handle
l
ONE-PIECE DOOR WITH TRACK I
E CLOSED POSiTiON
Chain Trolley
Pulley Bracket Chain ]_
Curv ...............
_c k;toc::oo_ A/,!o _: )j _ Rat,
/_// Bracket !!o? ht E/ergency Release
Rope & Handle
/--i_l__ _ - \ Safety.
_ Heverstng --
i__--[ Gap between floor and Sensor
Safety bottom of door must not
Reversing exceed 1/4" (6 mm) I
Sensor j
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