Generac Power Systems GH-410 Installation Manuallines page 20

Appendix B
2 Switch the main utility breaker OFF. Refer to NFPA 70-E for the
safety equipment required when working inside a live transfer
switch.
3. Energize the utility and check line-to-line and line-to-neutral
voltage at terminals N1 and N2 on the transfer contactor. If
line-to-line voltage is not approximately 240 volts, de-energize
utility power and check the terminations between the utility
and N1 and N2.
If line-to-neutral voltage is not approximately 120 volts, de-
energize utility power and check the neutral terminations.
Repeat the same voltage checks on terminals T1 and T2 to
make sure current is flowing properly through the contactor.
4. Switch the generator's main circuit breaker OFF and put the
mode switch in the OFF position.
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5. Make sure utility power is OFF and place all of the individual
circuit breakers in the main distribution panel in the OFF position.
6. Locate the transfer handle, insert the metal end into the slot in
the main contactor assembly. Pull the handle DOWN to move
the main contacts to the standby power (generator) position.
NEVER OPERATE THE TRANSFER SWITCH MANUALLY WHEN
LOADS ARE CONNECTED.
7. Put the generator's mode switch in MANUAL to start the engine.
Allow the engine to warm up, then switch the generator's main
breaker to the ON position. The generator is now supplying
electricity to the transfer switch but is not carrying any load.
8. Check to be sure that voltage and frequency from the
generator is correct. If line-to-line voltage is not approximately
240 volts, refer to the generator Owner's Manual for the
proper adjustment procedures. If line-to-neutral voltage is
not approximately 120 volts, check the neutral connection
between the generator and transfer switch.