9
3. Secure the mixing box to the filter frame using the supplied
sheet metal screws (No. 8 x 1/2 in. for horizontal units,
No. 8 x 1 in. for vertical units) at the mounting hole located at
the center of each duct flange. Seal the connection between
the mixing box and the return duct flange with appropriate
tape/sealant product. Be careful not to tape or seal the filter
access panel. (See Fig. 14.)
Fig. 14 —
Optional Mixing Box
3(76)
A
C
2.4(61)
4(102)
H
2.4(61)
3(76)
1(25)
2(51)
2(51)
W
B
Top Views
BTM/Rear Inlet - 42DH
Top/Rear Inlet - 42DH
Top/Front Inlet - 42DV
W
4(102)
2.4(61)
C
1(25)
H
A
A
B
A
2.4(61)
DIMENSIONS in. (mm)
42DH, DV UNIT SIZE
H
W
A
B
C
06
18.50 (470)
28 (711)
6 (711)
24 (610)
11 (279)
08
18.50 (470)
28 (711)
6 (711)
24 (610)
11 (279)
10
20.28 (514)
37 (940)
8 (940)
33 (828)
13 (330)
12
20.28 (514)
37 (940)
8 (940)
33 (828)
13 (330)
16
20.28 (514)
47 (1194)
8 (1194)
43 (1092)
13 (330)
20/22
22.75 (578)
48 (1219)
8 (1219)
44 (1118)
13 (330)
30
31.00 (787)
48 (1219)
10 (1219)
44 (1118)
15 (381)
