Assembly - Chamberlain SectionalLift Plus Installation And Operating Instructions Manual

ASSEMBLING THE 4 PIECE SEGMENTED RAIL
8
The segmented rail is largely preassembled and consists of 4 parts. The carriage, push rod, release handle, the guide pulley and
the lintel bracket with belt tensioner are in the front part (A). The seating for the drive shaft and the sprocket are in the rear part
(B). Hardware items are placed in the rails during transportation - remove these. Lay the front and rear rail sections one behind
the other.
1. Remove cable ties that secure the belt.
2. Taking care to ensure the belt is not twisted, pull apart the two rail sections completely in order to create a gap for the middle
sections (C & D). This rail is designed in such a way so as to easily add the middle section. Slide the 2 connecting pieces (E)
over the seams of the rail sections up to the markings. To secure the connecting pieces, bend the sheet metal lugs outwards
with a suitable tool. The assembly of the rail is complete.
3. Visually check the belt is not twisted.
E
E
TIGHTEN THE BELT
9
Note: The spring must be able to compress and bounce during
operation. Final tensioning can be performed after installation if
necessary. Over tightening the belt may overload the system and cause
excessive wear.
1. Tension the belt by adjusting the nut (1), on the pulley assembly,
clockwise until the spring is engaged.
2. Continue tightening to compress the spring and remove all the slack in
the belt. DO NOT OVERTIGHTEN but ensure belt is firm.
3. 36-38 mm as indicated in the diagram is normal.
FASTEN RAIL TO OPENER
10
1. Slide the RAIL BRACKET (1) onto the powerhead end of the rail (A)
around 200 mm.
2. Position the rail drive spocket (2) over the opener motor shaft (3) and
push down to install.
3. Secure the rail on the opener with two C-Rail brackets (4) and the
screws (5)Note: Only use 18mm Screws (item 9 in Hardware Provided -
Section 5).
ASSEMBLY SECTION
E
D
2
B
E
1
D
C
X
C
E E
1
7
A
36 - 38 mm
1
5
2
A
4
3