Grain Systems Bin Accessories PNEG-524 - Manual (Page 12)

12 PNEG-524 Roof Exhaust Fan
5. Installation
All single phase motors and the 1/2 HP explosion-proof 3 phase motor are supplied with automatic
overload protection. The remaining 3 phase motors do not have internal motor protection.
Motors rated as explosion-proof (EX PRF) meet class II group F and G of the National Electric
Code (NEC).
Figure 5A Open area dimensions and 18" 1/2 HP roof
fan exhauster side view illustration.
Figure 5B Open area dimensions and 24" 2 HP roof
fan exhauster side view illustration.
Standard electrical safety practices and codes should be followed when working with a fan. Refer to the
National Electric Code Standard Handbook by the National Fire Protection Association. A qualified
electrician should make all wiring installations.
Roof Fan Description
GSI roof exhaust fans are designed to mount on structures with sloping roofs and with a flat roof surface
at least as large as shown
in Figure 5A and Figure 5B . The fans will mount between the ribs of standard
tapered roof sheets on round steel bins without cutting the ribs, which keeps the strength of the roof sheet
intact. The 18" 1/2 HP roof fan is shipped completely assembled and will mount on a roof slope of 30º.
The 24" 2 HP roof fan is shipped with the roof adaptor and rainhood unassembled and it is also designed
to mount on a 30° roof slope.
WARNING
Always disconnect and lock out power before working on or around fan.