Emerson 3000 User Manual

Refer to drawings for unit dimensions and component locations.

The indoor condensing unit is usually mounted above the ceiling and must be securely mounted to the 

roof structure. The ceiling and ceiling supports of existing buildings may require reinforcements. Be 

sure to follow all applicable national, state and local building, plumbing and electrical codes. Use 

field-supplied threaded suspension rods and 3/8"-16 factory hardware kit.
The indoor condensing unit must be located at the same level or above the Liebert Challenger 3000 

unit. It must NOT be located below the Liebert Challenger 3000.
Recommended clearance between ceiling grids and building structural members is unit height plus 

3 inches (76.2mm).
Install the four field-supplied rods by suspending them from suitable building structural members. 

Locate the rods so that they will align with the four mounting holes in the flanges that are part of the 

unit base.
Using a suitable lifting device, raise the unit up and pass the threaded rods through the four 

mounting holes in the flanges that are part of the unit base.
Attach the threaded rods to the unit flanges using the supplied nuts and grommets. (See Figure 35 - 

Detail of ceiling hanging bracket, Threaded Rod and Hardware Kit Installation). The rubber 

grommets provide vibration isolation.
1. Use the plain nuts to hold unit in place. Adjust these nuts so that the weight of the unit is 

supported evenly by the four rods, does not rest on the ceiling grid, and is level.

2. Use the Nylock nuts to “jam” the plain nuts.

Risk of ceiling collapse and heavy unit falling. Can cause equipment and building damage, 

serious injury or death.
Verify that the supporting roof structure is capable of supporting the weight of the unit(s) and 

the accessories during installation and service. (See Table 30 - Indoor centrifugal 

condensing unit.)
Be sure to securely anchor the top ends of the suspension rods. Make sure all nuts are tight.

NOTE
 The units must be level in order to operate properly.

MC_40A

MC_39A

240 (109)

MC_65A

MC_64A

449 (204)