7. ELECTRICAL INSTALLATION
Three Phase SystemWith 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 rechecked for proper rotation.
Figure 7A Connecting the Fan Rotation for Three 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. Your 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 Rain hood in Place.
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