Split System Models
7.5Centrifugal Air Cooled Condensing Units
7.5.1Installing the Indoor Condensing Unit
Refer to drawings for unit dimensions and component locations.
! WARNING
Be sure 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.
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 codes. Use
Recommended clearance between ceiling grids and building structural members is unit height plus three inches.
Install the four
Using a suitable lifting device, raise the unit up and pass the threaded rods through the four mount- ing 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 25 - 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.
NOTE
The units must be level in order to operate properly.
2. Use the Nylock nuts to “jam” the plain nuts.
Table 30 Indoor centrifugal condensing unit
Model | Net Weight | |
|
| |
60 Hz | 50 Hz | lbs (kg) |
|
|
|
MC_40A | MC_39A | 240 (109) |
|
|
|
MC_65A | MC_64A | 449 (204) |
|
|
|
MC_44W | MC_43W | 190 (86) |
|
|
|
MC_69W | MC_68W | 282 (128) |
|
|
|
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