Chamberlain 1A4324 User manual

1
1. Review the illustrations shown (Figure 1) and select the one
(A, B, or C) that matches your application.
NOTE: Illustrations shown are for LEFT hand mounting.
RIGHT hand mounting opposite.
FIGURE 1
A
Front of Hood
ABOVE Door Shaft
Bracket
Headplate
Door
Shaft
Front of Hood
BELOW Door Shaft
BBracket
Headplate
Door
Shaft
C
Top of Hood
Door
Shaft
Bracket
Headplate
2. Attach the gusset to the bracket using the four 3/8" x 1" cap
screws and hardware shown. Then tighten.
NOTE: For Application 1A attach gusset to end of bracket
marked A, etc., (Figure 2).
3. Install the four 3/8" x 1-1/2" cap screws and hardware shown.
Do not tighten.
4. Temporarily locate and clamp bracket in correct position
on headplate.
NOTE: Leave a minimum of 1" between bracket and headplate
(Figure 3).
5. Place drive sprocket on operator output shaft and driven
sprocket on door shaft. Do not insert keys or tighten set
screws.
6. Hold operator in position on bracket and wrap #50 roller
chain around drive sprocket and driven sprocket to determine
length of chain required.
NOTE: Lockwasher and nut will need to be removed and
replaced on operator mounting screws to perform this step.
NOTE: Observe location of mounting screws in slots of
bracket. Leave room in slots for chain tensioning. For
Application 1A, screws should be close to bottom of slot with
chain installed, for Application 1B, screws should be close to
top of slot, and for Application 1C, screws should be close to
end of slot towards wall. Readjust bracket if necessary and
repeat procedure before cutting chain.
NOTE: Make certain that operator shaft is above, below or in
front of door shaft, never in-line. 7. Remove operator from
bracket and cut #50 chain to required length.
3/8" Flat
Washer
3/8" Split Washer
3/8" Hex Nut
3/8 x 1"
Cap Screw
Bracket
3/8" Flat Washer
3/8" Hex Nut
3/8 x 1-1/2"
Cap Screw
3/8" Split
Washer
Gusset
A
BC
+
FIGURE 2
Model 1A4324
GJ Hood Mount
Installation
FIGURE 3
Headplate
Top View
1" MinimumBracket
Door
Shaft
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WARNING: This product can expose you to chemicals including lead, which are known to the State of California to cause cancer or birth defects or other
reproductive harm. For more information go to www.P65Warnings.ca.gov

8. Permanently attach bracket to headplate in the location
determined in Step 6. Welding is recommended for this
procedure.
9. Attach operator to bracket using 3/8 x 1-1/2 mounting
screws and hardware. Do not tighten.
10. Insert key in driven sprocket and align driven sprocket with
drive sprocket. Tighten set screws. Do not place key in
drive sprocket at this time.
11. Wrap #50 chain around drive and driven sprocket and
connect ends using #50 master link.
12. Remove slack from chain by moving operator and mounting
screws in bracket slots. Tighten mounting screws.
NOTE: Keyway in operator output shaft may not be aligned
with keyway in drive sprocket. Complete electrical
connections to operator (refer to manual) then operate unit
with 3 button control until keyways align. Insert key in drive
sprocket and tighten set screws. Complete the installation
according to the owner’s manual.
© 2006, The Chamberlain Group, Inc.
114A1545B All Rights Reserved
114A1545C