B lower
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1. Remove and discard shipping brackets and wood support (attached to sides of motor and inlet collar). Fig. - 7
BEFORE INSTALLING , check to see if blower wheel turns freely and does not rub on motor brackets. Check damper door to be sure it moves freely and spring returns door to closed position.
2.Provide 14” x 18” hole through the roof or wall as shown in Fig. - 2. For reference, location of 10” duct connection and wiring connection is shown.
Ins ta lla tion - E xterna l
3.Install blower on roof or wall, with discharge (screened end) pointing down, according to standard roofing procedures.
NOTE: Front discharge edge should be on top
of shingles and rear and side edges under shingles. Unit must be sealed between roof or wall and under side of flange with roofing mastic to prevent leaks.
For installation on a flat roof, or roofs with pitch of less than 1 1/2’ in 12”, install blower on curb as shown in Fig. - 3. Position curb on sloping roof with 2” dimension facing down slope. Position curb on flat roofs so that disc harge points away from prevailing wind.
10 1/2"
1 1/2"
Remove
Remove
4 1/2"
7 3/4"
14"
Top View Down Slope of
Roof or Wall
18"
Remove
Remove
1 1/2"
2"6"
30"
24"
3
