240 VAC
ACDC
VOLTS 
VOLTS
Connect to
L2 terminal
Connect to
L1 terminal
Figure 3-2 AC voltage test
Starting up the Sun Tie XRTo start up the inverter:1.Switch on the 100-amp DC circuit breaker located in the Sun Tie XR unit. This breaker supplies the DC power from the PV array to the Sun Tie unit. Refer to Figure 3-3, item 1.
2.Switch on the 1 and 100 amp (ganged) PVGFP breakers. These breakers open when 1 amp or greater is detected in the DC negative- to-ground line; indicating a ground fault condition. Refer to Figure 3- 3, item 2.
3.Switch on the double-pole 15 amp AC circuit breakers located in the Sun Tie XR unit. These breakers provide the Sun Tie XR-produced power to the utility and provide the necessary utility voltage and frequency to the inverter. This means the inverter will not produce an AC output if utility voltage is not present on its output. Refer to Figure 3-3, item 3.
