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Introduction
Liebert
®
AC4
™
2
1.4 Outside Enclosure Overview
The Liebert AC4 controller board comes in an enclosure that is 2-3/4" deep and has a built-in liquid
crystal display (LCD) and a key lock, as shown in Figure 1. The enclosure is made of metal to
accommodate secure conduit fittings and protect components against environmental debris.
Figure 1 Liebert AC4 enclosure—external features
The enclosure must be secured to a wall, either flush-mounted or recessed in the wall, as described in
2.0 Installation. Knockouts and access slots on the top and bottom allow easy connection of wires
and cables (see 3.0 Wiring and Connections) with either mounting type.
Figure 2 Liebert AC4 enclosure—internal features
LCD for configuration
and operation
Key lock
The enclosure
has knockouts
and access slots
on top and
bottom for
cables and wires.
Back of LCD
Controller Board
Ground wire
for LCD
Knockouts and
access slots
(top and bottom)