Owner`s manual

to the lower terminal connection landing. Note that there is room for three lugs with two holes spaced one inch
apart. Cables and terminal lugs are not furnished with the inverter and must be ordered separately for the 3.5 kVA
to 145 kVA units. The 17.5 kVA and 21 kVA inverter require the super flexible (fine strand) wire, which is supplied
as an option with the Maintenance Bypass unit.
The utility input and output cables are connected to a screw type terminal block. Connect the ground wires first,
then the white neutral wires, then connect the black AC input wire (if applicable) and the black AC output wire. A
separate, optional “Maintenance Bypass” unit and a “Power Distribution” panel (200A Square D “QO” type of circuit
breakers) is available.
2.3.2 AC Input/Output Voltage Selection
The inverter is preset at the factory for 120VAC input, ON-LINE, 120 VAC, 60 Hz output.
If the input voltage or for your installation is different (200VAC to 240VAC), the following procedure MUST be
followed. In the “Static Sw” area, there is a printed circuit board mounted to the right side panel. A multi-pin
connector is located on the printed circuit board, close to the “Static Switch” front panel, identified as J23. This
connector has 13 pins. Its mating plug has 12 positions, with interconnecting wires. This allows the jumper plug
(P13) to be installed in one of two positions. When this jumper plug is in it most forward position (closest to the front
panel), the unit is set for 100-120VAC operation. Removing the plug and installing it in its rear most position selects
200-240VAC operation. Verify that this plug is in the proper position before applying any voltage to the inverter
system. See Figure 2-2.
EMI filer wiring. There are two separate inverter AC output EMI filters. Each filter provides one half of the output
power to the system. These filters must be connected in parallel for 100-120VAC output or connected in series for
200-240VAC output. There are only two wires connected to these two filters. The “Neutral” wire, with the white
band, is connected to the lower EMI filter left-hand stud. The “AC output” wire is connected to the upper EMI filter
right-hand stud. In the 100-120VAC configuration, the left-hand studs of the EMI filters are connected together by
a copper bus bar strap and the two right-hand studs of the EMI filters are connected together by a bus bar strap.
To change to the 200-240VAC connection, remove the wires and bus bars from the output terminals of the EMI filter.
Install the copper bus bar between the lower EMI filter right-hand stud to the upper EMI filter left-hand stud. Re-
connect the white “Neutral” wire to the lower EMI filter left-hand stud and the “AC output” wire to the upper EMI filter
right-hand stud. Replace the hardware (flat washer, lock washer, and nut) and tighten the 10MM nuts to the
prescribed torque, 35.4 inch-lbs (4 Nm). Refer to the decal on the cover plate of the static switch for strap positions.
Again, verify that P23 plug on the “Static Switch” printed circuit board (located on the right side panel, is in the
240VAC, rear most position before applying any voltage to the inverter system. The extra copper bus bar may be
discarded. Replace the top cover of the “Static Switch” and secure it with the three previously removed 6-32x1/4”
“Phillips” head screws.
2.3.3 Software Configuration Set-Up
A “Lap-Top” Personal Computer (PC) with the “Field Service Set-up” software for the S4 inverter family needs to be
available and connected to the DB-9 connector of the “Display” panel via the appropriate cable. In systems that do
not have the redundant controller printed circuit board, there is no need to open the “Display” panel or remove the
redundant controller. Go directly to step 3.3.2.
2.3.3.1 Dual Processor Set-Up
The following procedure should be followed for systems that contain a redundant (second) microprocessor. Using
a #2 “Phillips” screw driver, remove the two screws securing the “Display” panel to the “Receiver” rack. Swing the
panel forward, but do not detach it from the rack. Using the “Phillips” screw driver, remove the two screws holding
the microprocessor boards in place. The circuit board securing bracket is also a circuit board extractor. Using this
bracket, pull the top microprocessor circuit board out slightly so that it is disengaged from its 70 pin edge plated
Owner’s Manual
Installation & Operation page 2 — 7