Secondary Installation
| Required Width |
Adjustable | Adjustable |
Surround Corner | Surround Corner |
| B/2 |
| B |
Required |
|
Height |
|
| Trim (Classic or Colonial) |
| A |
| Note: Mounting brackets |
| removed for clarity |
Figure 63: Marking offsets on Trim, Relates to Table 7.
to cover. From this decide which size of the adjustable surround will meet your need. Refer to Table 1 for the Adjustable Surround ranges. In the Table 7 example, we want to cover an area of 25” (635mm) x
Table 7: Adjustable Surround Example, Relates to Figure 61.
| Height | Width | |
|
|
| |
Area Needed to Cover | 25” (635mm) | 391⁄4” (997mm) | |
|
|
| |
Minimum size of Large | 24” (609mm) | 361⁄4” (921mm) | |
Adjustable Surround | |||
|
| ||
Difference | 1” (26mm) = A | 3” (76mm) = B | |
|
|
|
Figure 64: Installing Mounting Bracket.
391⁄4” (997mm); this falls into the large adjustable surround range.
Note: The bottom of the keystone and surround corners can be trimmed to make the surround smaller.
b)Subtract the minimum size of the surround (213⁄4” (552mm) x 317⁄8” (809mm) for the small and 24” (609mm) x 361⁄4” (921mm) for the large) from the size needed. Write down the difference. In the Table 7 example, the differences are 1” (26mm) and 3” (76mm).
c)Mark the height difference on the left and right trim sides. Using the example, they would be marked 1” (26mm) from the bottom of each side, see dimension “A” in Figure 63.
d)Mark the center of the top trim, 155⁄8” (397mm) from either side. From the center line mark half the width distance on either side. Using the example of 3” (76mm), there would be marks 11⁄2” (38mm) on either side of the center line, see dimension “B/2” in Figure 63.
10.Fasten a mounting bracket to each of the four (4) mounting bracket backs using two (2) #8
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