Emerson AC4 User Manual

The Liebert AC4 has two zones that may be used to define different areas—rooms or sections of a 

room. The Liebert AC4 effectively performs as two separate units, controlling each zone separately, 

for examply, using a different rotation sequence for devices in each zone.
Each zone may have two to four outputs associated with it. By default, Zone 1 has four associated 

outputs and Zone 2 has none.
To set up zones:

• From the Main Menu, use the arrows

↑↓

 to

 

choose System and 

Control, then press Enter ↵ (see 7.1 Login for help).

• Enter your password at the Login screen.
• From the System and Control Menu, use the arrows

↑↓

 to

 

choose 

Setup System, then press Enter ↵.

• From the Setup System Menu, shown at right, use the arrows

↑↓

 

to

 

choose Setup Zones and press Enter ↵.

• From the Setup Zones Menu, choose a zone—for example, 

Zone 1—and press Enter ↵.

• On the Number of Devices screen, Use the arrows ↑↓ to select the 

number of outputs for this zone, then press Enter ↵. The example 

at right shows four outputs in Zone 1.

Table 15 shows the default number of outputs for each zone.

NOTE: Each zone that is used must have at least two outputs, and the 

total for the two zones cannot exceed four. 
A message appears if you enter too few or too many devices, as shown 

at right. Press Escape to return to the Setup Zones menu.
Table 16 shows the possible combinations of outputs for each zone. 

For example, if Zone 1 has four outputs, then Zone 2 may not be used 

(0 outputs).

Zone 1

4

Zone 2

0

4 or 3 outputs

0 (not used)

2 outputs

0 (not used) or 2 outputs

0 (not used)

2 or 3 or 4 outputs

SETUP INPUTS
SETUP COMMON ALARM

↑↓=NEXT

↵

=SELECT

SETUP OUTPUTS
SETUP SYSTEM INFO
SETUP OPERATION 

SETUP ZONES

ZONE 2 0

↑↓=NEXT

↵

=SELECT

# DEVICES IN ZONE

ZONE 1 

4

↑↓=SELECT

↵

=NEXT/END

MINIMUM OF 2 DEVICES
ESC BACK

TOO MANY DEVICES
ESC BACK