Sidewall Propeller Fans
4
®
• Check chart below for correct wall opening
dimensions.
• Check motor voltage and amperage rating for
compatibility with electrical supply. Supply wiring
must be properly fused and conform to local and
national codes.
• Motor load amperage must be checked and
compared to nameplate rating to avoid serious
damage to motor when speed is increased.
Wall Opening Requirements
Wall opening size and propeller-to-damper distance
are two important dimensions for fan installation. Fans
mounted to the wall require a different wall opening
(W.O.) size than those mounted in collars or wall
housings. Propeller-to-damper distance (M) is important
to reduce turbulence and damper flutter which may lead
to premature damper failure.
Pre-Installation Checks
Fan
Size
Damper
Size
Square
Recommended Wall Opening
(W.O.) Square
M
Minimum
Figure 1
Figure 2
500 (20)
559 (22)
692 (27-1/4)
572 (
22-1/2)
305 (
12)
630 (24)
660 (26)
857 (33-3/4)
673 (
26-1/2)
330 (13)
800 (30)
813 (32)
1010 (39-3/4) 826 (32-1/2) 330 (13)
900 (36)
965 (38)
1162 (45-3/4) 978 (38-1/2)
356 (14)
All dimensions given in millimeters
(inches)
. Filters are 2 inch
(51 mm)
nominal thickness. Above filter sizes are actual dimensions.
Figure 2 - Direct to Wall Installation
Figure 1 - Wall Housing Installation
M
W.O.
W.O.
W.O.
M
W.O.
W.O.
W.O.
Figure 1
shows the wall opening (W.O.) required for
installations with either a wall housing or collar.
Figure 2
shows the recommended wall opening (W.O.)
and the minimum distance (M) suggested between the
fan and damper for direct to wall installations.
