Emerson AC4 user manual Outside Enclosure Overview, LCD for configuration, Operation

Introduction

1.4Outside 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

	LCD for configuration
	and operation
The enclosure
has knockouts
and access slots
on top and	Key lock
bottom for
cables and wires.

The enclosure must be secured to a wall, either flush-mounted or recessed in the wall, as described in

2.0Installation. 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

Back of LCD

Controller Board

	Knockouts and
	access slots
Ground wire	(top and bottom)
for LCD

Liebert® AC4™ 2