Site Preparation and Installation
2.4Installing the Evaporator or Chilled-Water Units
! 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 2.2 - System Weights.)
Be sure to securely anchor the top ends of the suspension rods. Make sure all nuts are tight.
The evaporator unit and indoor condensing unit are 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 3 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, springs, and washers. (See Figure 4). The coil springs 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 by the four rods, does not rest on the ceiling grid, and is level. Ensure none of the springs are compressed to solid height. The coil side of the unit is heavier, so these springs will be compressed more than the other side.
NOTE
The units must be level in order to drain condensate properly.
2. Use the Nylock nuts to “jam” the plain nuts.
Figure 4 Threaded rod and hardware kit installation
1/2" threaded rod (supplied by field)
hanging bracket
1" O.D. spring |
|
1/2" flat washer | base pan (ref) |
1/2" Nylock | |
locking nut | 1/2" hex nut |
|
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