Installation Guide

Installation
32 900-0144-01-01 Rev B
Connect all units other than the master to ports 2 and above on the communications manager.
The system display may have other port restrictions pertaining to stacking. In general, it is always
important to keep track of units and ports for programming purposes.
Programming involves using the system display to assign a status and stacking value to the inverter
on each port. The stacking assignments can be changed at any time as long as the master is
connected to port 1.
IMPORTANT:

The Radian GS7048E can be stacked with the Radian GS3548E in either a parallel or
a three-phase configuration. To optimize the Power Save function, GS3548E
inverters should have higher rank numbers than any GS7048E inverter. This is true
regardless of the quantity of either model. In addition, the GS3548E should not be
the master inverter in a mixed system.

The master inverter must always be connected to port 1 on the communications
manager. Connecting it elsewhere, or connecting a slave to port 1, will result in
backfeed or output voltage errors which will shut the system down immediately.

Installing multiple inverters without stacking them (or stacking them incorrectly)
will result in similar errors and shutdown.

Although stacking allows greater capacity, the loads, wiring, and overcurrent
devices must still be sized appropriately. Overloading may cause circuit breakers to
open or the inverters to shut down.