Grain Systems Bin Accessories PNEG-524 - Manual (Page 26)

7. Electrical Installation
26 PNEG-524 Roof Exhaust Fan
3 Phase System
With the power OFF at the fan disconnect, exchange the location of the current carrying conductors at
terminal L1 and L3
(See Figure 7A) of the magnetic controls. The unit will then need to be re-checked for
proper rotation.
Figure 7A Correcting the Fan Rotation for 3 Phase
Always check current local, state and national codes on electrical requirements before installing any
electrical equipment.
Transformer size is based on the current draw from the fan only. The electrician will need to add the KVA
requirements for the other components of the system in sizing the transformer.
Copper wire (rated 75°F) is sized for the fan service. The wire size from the transformer to the disconnect
service will be determined from the fan and the other electrical equipment requirements.
Figure 7B 24" Roof Fan Exhauster with the Rainhood in Place