Liebert 8 Tons User Manual

The optional filter box mounts directly to the return air opening of the evaporator. The filter box is 

supplied with two (2) 20% (Liebert part no. A-0320) or 30% (Liebert part no. A-0400) 25" x 20" x 4" fil-

ters.

Use flexible duct work or non-flammable cloth collars to attach duct work to the unit and to help con-

trol the transmission of vibrations to building structures. Insulation of duct work is vital to prevent 

condensation during the cooling cycle. The use of a vapor barrier is required to prevent absorption of 

moisture from the surrounding air into the insulation.
If the return air duct is short, or if noise is likely to be a problem, sound-absorbing insulation should 

be used on the duct. Duct work should be fabricated and installed in accordance with local and 

national codes.  

0

n/a

n/a

1146

1.9

0.5

n/a

n/a

1125

1.8

1

n/a

n/a

1104

1.7

1.5

946

0.9

1083

1.6

2

922

0.8

1063

1.5

2.5

972

0.7

1042

1.4

3

899

0.6

1021

1.3

3.5

851

0.5

1000

1.2

4

828

0.4

979

1.1

4.5

804

0.3

958

1.0

5

780

0.2

938

0.9

5.5

757

0.1

917

0.8

6

733

0

896

0.7

If free-cooling or hot water coil is ordered, reduce available external static 
pressure by 0.3" (8 mm). Contact Liebert Representative for other Air Volumes.
Factory setting is 0.5" (13 mm) with 2 hp motor. Field adjust to suit application.