Installation Instructions

GS-IOB-120/240VAC Installation Instructions
6 900-0126-01-00 REV A
Basic AC Wiring
The GS-IOB-120/240VAC comes with six red, six black, and one white wire that are
labeled according to their intended electrical connection. It also comes with an
unlabeled green wire, and four unlabeled short red and black wires. If the
preceding steps are followed, as well as the drawing in Figure 5, these wires will
have sufficient length to make the intended connections.
It is recommended that the wires be connected to the circuit breakers prior to
re-installing the main circuit breaker bracket. To install the wires:
1. Remove the nut and washers from each circuit breaker, noting the
sequence of the washers.
2. For each of the 12 wires, install the wire’s ring terminal on the
appropriate terminal post for each circuit breaker according to Figure 5.
Typically each post is equipped with two identical star washers. The
ring terminal on the wire should be installed between these star
washers. If there is only one star washer, install the ring terminal on the
post first, then the star washer and the remaining hardware.
3. Torque the nut to 35 in-lbs (4 Nm).
4. Install the 4 short wires between the input, output, and bypass circuit
breakers as shown in Figure 5.
5. Re-install the main circuit breaker bracket using the four screws and any
star washers that were previously removed. Use the illustrations in
Figure 3 on page 4 for reference.
6. Connect the 12 wires from each circuit breaker to the appropriate bus
bar as shown in Figure 5.
7. Connect the white AC Neutral wire to the neutral bus bar.
8. Connect the green wire to the ground bus bar.
All wires from steps 6, 7, and 8 should be torqued to 25 in-lbs (2.8 Nm). It is
recommended to make 90-degree bends in the wires as shown, so that the layout
is easy to follow in the future. (The wires have been designed to be long enough.)
At this time, all wires should be connected to bus bars or circuit breakers. Certain
wires will only have one end connected, with the other end meant to be
connected to a 120/240 Vac Radian Series Inverter/Charger. (This is usually
positioned above the GSLC.) The disconnected wires should have these labels:
• AC OUT HOT LEG 1
• AC OUT HOT LEG 2
• GRID IN HOT LEG 1
• GRID IN HOT LEG 2
Before connecting these wires to the inverter, use a digital multimeter to check
that all electrical connections are correct and show continuity. Once confirmed,
connect the wires to the Radian inverter/charger, removing knockouts and
• GEN IN HOT LEG 1
• GEN IN HOT LEG 2
• AC NEUTRAL
• (Green Wire — No Label)