PV Grid-tied Residential Inverter and Integrated AC/DC Disconnect
Installation and Operation Manual
25
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AVERTISSEMENT
S’assurer que le système de mise à la terre et la tension du
panneau PV entre la borne positive et négative des connecteurs
de câble des panneaux PV sont corrects avant de connecter
les panneaux au bloc de jonction en CC sur le tableau de
distribution de l’alimentation.
Note:
For all temperature conditions the VOC, for each series
connection, must total less than 500 VDC for all residential
inverter models.
To wire the inverter/disconnect unit to the PV Array, follow these steps.
1. Ensure the AC/DC Disconnect switch is in the OFF position.
2. Determine the PV array grounding scheme by following the PV
manufacturer’s recommendation.
• If the PV array is negatively grounded, proceed on to the next step.
• If the PV array is positively grounded, follow the instructions in
the appendix to properly configure the inverter for positive ground-
ing schemes.
3. Clearly label the ground and equipment ground conductor (EGC)
conductors from the PV array. The AC/DC Disconnect accepts multi-
stranded wire gauges up to 6 AWG from the PV array.
4. Insert a fitting into one of the DC knockouts on the bottom of the
disconnect and fasten securely with a locking nut. Refer to Figure 4-2
for knockout locations.
5. Route the PV system array’s conductors through the fitting and into the
wire raceway in the disconnect.
6. Connect the equipment ground conductor (EGC) to the grounding lug
located on the lower front of the wire raceway of the disconnect.
Note:
Verify the polarity and the open-circuit voltage from the
PV array before you connect the DC wires to the DC input
terminals on the inverter/disconnect unit. Applying an
open-circuit DC-input voltage that exceeds the maximum
DC-input-voltage range will cause irreversible damage to
the inverter and void the warranty. Use the online string
calculator at www.pvpowered.com to determine the correct
string configuration.
7. Connect the grounded conductor to the terminal marked “-”on the DC
circuit board on the right side of disconnect.
8. Connect the ungrounded conductor to the terminal marked “+”on the
DC circuit board on the right side of disconnect.
