Electrical Connections
Installation Guidelines for Air-Cooled Generators
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6.3 — Main AC Wiring
Figure 6-3. Main AC Wiring
NOTE: Main AC (E1, E2 and Neutral) wiring must be in accordance with local jurisdiction and codes.
1.
Strip insulation from wire ends. Do not remove excessive insulation.
2.
Remove two cap plugs located behind the breaker door and to the right of the Main Breaker.
3.
Loosen the lugs of the Main Breaker through the access holes.
4.
Insert a power wire (E1 or E2) through the opening in the back cover and into the bottom lug. Torque to the
proper specification.
NOTE: Remove three screws inside the top of the breaker panel (behind the breaker door), and carefully pull
out entire breaker box. When reinstalling, be sure that tabs at the bottom lock into place.
5.
Connect the Neutral wire to the Neutral Lug and tighten to specification. See Figure 6-1.
6.
Connect the Ground wire to the Ground Lug and tighten to specification. See Figure 6-1.
NOTE: Neutral Bonding - For installations that require the neutral to be bonded to the ground, this is to be
done on the customer connections terminals inside the generator. Connect a suitably sized wire from the neu-
tral bar to the ground bar. This is normally required when the generator is the source in a separately derived
system. It is not required when the generator is a backup source in a utility supplied electrical system with a 2-
pole transfer switch. See Figure 6-1.
NOTE: Torque all wiring lugs, bus bars and connection points to the proper torque specifications. Torque
specifications for the Main Line Circuit Breaker (MLCB) can be found on a decal located on the inside of the
Main Line Circuit Breaker Door.
6.4 — Automatic Voltage Regulator (AVR) Cooling Fans
The system is equipped with two fans to cool the AVR electronics. The primary fan is powered by AC during operation.
The secondary fan is powered by 12V DC through the controller. The fans are monitored during operation and if a fail-
ure occurs, an alarm is displayed.
The secondary fan continues to operate for up to
one hour
after the generator is shut down. Proper cooling must occur
before removing either battery connections or 7.5 amp fuse for maintenance or other service activity.
The secondary 12V DC fan continues to operate for up to one hour after the generator is shut
down, even if the 7.5 amp ATO fuse in the controller is removed. To prevent hand injury,
always exercise caution when working near the AVR fan housing.
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