Greenheck Adjustable Pressure Controller (468292) - Manual (Page 2)

Installation
1. The APC assembly mounts on the inlet (linkage/counterbalance weight) side of the damper. Locate assembly on
damper sill so the crankarm is directly under the damper blade lever arm.
2. The mounting bracket (item #1) is designed so the sloped portion of bracket rests on the outer frame flange, with
the two ears, one on each side, resting on the highest part of the frame.
3. Fasten through ears using two #10 x 1/2 in. Tek screws, item #12.
4. Use 13/64 drill (5mm) to drill through frame on sloped portion of bracket. If accessible, insert two #10-32 x 5/8
in. threadstuds (item# 10) from the exterior and fasten with two #10-32 Keps nut (item #11). If unaccessible, use
minimum #12 self-threading screws.
5. See table below to determine quantity and combination of connecting links to be used. The longer link is always
to be installed towards the blade (top). Connect link(s) using two 1/4-20 threadstuds (item #15), and nuts (item
#16), with center distance between hole centerlines as indicated. On some short damper heights, only one 5A (4
1/8 in.) or 5B (3 in.) is used. The heads of the threadstuds should be towards the linkage tie bar so the fasteners
do not inhibit opening.
Height
(in.)
Center
Distance
Links to
use
10 5.56 5A & B
11 2 5B
12 3.13 5A
13 4 5A & B
14 5.06 5A & B
15 5.25 5A & B
16 2.5 5B
17 3.63 5A
18 4.56 5A & B
20 5.25 5A & B
21 5.56 5A & B
22 4 5A & B
23 5.06 5A & B
24 5.25 5A & B
25 5.25 5A & B
26 5.25 5A & B
27 4.56 5A & B
28 5.25 5A & B
29 5.25 5A & B
30 5.25 5A & B
31 5.25 5A & B
32 5.56 5A & B
33 5.25 5A & B
34 5.25 5A & B
35 5.25 5A & B
36 5.25 5A & B
37 5.25 5A & B
38 5.25 5A & B
39 5.25 5A & B
40 5.25 5A & B
41 5.25 5A & B
42 5.25 5A & B
Height
(in.)
Center
Distance
Links to
use
43 5.56 5A & B
44 5.25 5A & B
45 5.25 5A & B
46 5.25 5A & B
47 5.25 5A & B
48 5.25 5A & B
49 5.25 5A & B
50 5.25 5A & B
51 5.25 5A & B
52 5.25 5A & B
53 5.25 5A & B
54 5.56 5A & B
55 5.25 5A & B
56 5.25 5A & B
57 5.25 5A & B
58 5.25 5A & B
59 5.25 5A & B
60 5.25 5A & B
61 5.25 5A & B
62 5.25 5A & B
63 5.25 5A & B
64 5.25 5A & B
65 5.56 5A & B
66 5.25 5A & B
67 5.25 5A & B
68 5.25 5A & B
69 5.25 5A & B
70 5.25 5A & B
71 5.25 5A & B
72 5.25 5A & B
73 5.25 5A & B
74 5.25 5A & B