CLCH-SVX03C-EN
25
Installation - Mechanical
Ceiling Suspension
Note:
Ceiling suspension is recommended only for M-Series unit sizes 3 to 57 with factory-
provided base rails. Unit sizes 66 to 120 should be platform-mounted.
Using a Field-Provided Mounting Frame
If a factory-provided base rail was not ordered, the installer/contractor must provide a ceiling-
suspended mounting frame designed to support the length, width, and weight of the entire air-
handling unit. See the
“Dimensions and Weights” section on page 13
for approximate module
weights.
Note:
It is the building engineer’s responsibility to size the structural channels and to provide the
appropriate hangers.
Structural channels in a field-provided frame can be mounted parallel to airflow or perpendicular
to airflow:
•
For parallel-to-airflow channels, size the channels based on a four-point load distribution (see
Figure 10
.
•
For perpendicular-to-airflow channels, size the channels based on the load distribution of the
individual modules and install the channels so that both ends of every module are supported
(see
Figure 11
).
Figure 10. Typical suspension method using parallel
channels
Figure 11. Typical ceiling suspension using perpendicular
channels
Figure 12. Ceiling suspension, size 3-57 with base rail
Using Factory-Provided Base Rails
If individual modules and/or subassemblies have
base rail shipping splits, use the following
considerations:
•
Suspend the unit (on both sides of the unit) at
each shipping split as well as the four corners of
the unit (see
Figure 12
).
•
Bolt shipping splits together.
Note:
The hanger rods must extend through the
bottom of the base rail. It is the building
engineer’s responsibility to provide the
appropriate hangers.