Emerson 3000 Manuel D’Utilisation

The air-cooled condenser should be located for maximum security and maintenance accessibility. 

Avoid ground level sites with public access or areas that contribute to heavy snow or ice 

accumulations. Utilize centrifugal condensers whenever interior building locations must by used. To 

assure adequate air supply, it is recommended that condensers be located in a clean air area, away 

from loose dirt and foreign matter that may clog the coil. In addition, condensers should not be located 

in the vicinity of steam, hot air, or fume exhausts. Also, condensers should be located no closer than 

three feet (1 meter) from a wall, obstruction, or adjacent unit.

Install condensers in a level position to assure proper refrigerant flow and oil return. For roof 

installation, mount condensers on steel supports in accordance with local codes. To minimize sound 

and vibration transmission, mount steel supports across load bearing walls. For ground installation, a 

concrete pad will provide adequate support. Condenser legs have mounting holes for securing the 

condenser to the steel supports or concrete pad.

Refer to equipment nameplate regarding wire size and circuit protection requirements. Refer to 

electrical schematic when making connections. Make all wiring and electrical connection in 

accordance with local and national codes.

Line voltage electrical service is required for all air-cooled condensers at the location of the condenser. 

This power supply does not have to be the same voltage as the indoor unit. This separate power source 

may be 208, 230, 460, or 575 V, 60 Hz; or 200, 230, or 380/415 V, 50 Hz. The disconnect switch may be 

factory-supplied and mounted in the electrical panel or field-supplied and mounted per local and 

national codes.

A control interlock between the condenser and the indoor unit is required and is connected between 

70 and 71 in the handy box of the indoor unit and the electric panel of the air-cooled condenser. NEC 

Class 1 wiring is required.

Liebert Lee-Temp condensers require a separate power supply for the heated receivers. This power 

supply is connected to the electrical connection box on the end of the receiver.

NOTE
If the condenser is located below the level of the room unit, the factory should be consulted.

Risk of electric shock. Can cause injury or death.
Potentially lethal voltages exist within this equipment during operation. Observe all cautions 

and warnings on unit and in this manual.
The Liebert iCOM

®

 microprocessor does not isolate power from the unit, even in the “Unit 

Off” mode. The only way to ensure that there is NO voltage inside the unit is to install and 

open a remote disconnect switch. Refer to unit electrical schematic.
Use voltmeter to make sure power is turned Off before making any electrical connections.

Risk of loose electrical wiring connections. Can cause overheating of wire, smoke and fire 

resulting in building and/or equipment damage, injury or death.
Use copper wire only and verify that all connections are tight.