Installing Indoor Flue Stacks; Installing Rain Hood/Combustion Air Inlet; Installing Flue Stack For Hurricane Applications; Duct Connections - Trane Performance Climate Changer CSAA Series Installation, Operation And Maintenance Manual

Installation

Installing Indoor Flue Stacks

Gas heat sections for indoor air handlers require a field-
engineered and field-installed flue stack. Local codes and
practices vary throughout the country. The engineer
should size the flue based on MBh output, horizontal and
vertical run lengths, type of flue material, NFPA 54 Fuel Gas
Code, and local codes. The flue should be designed for 800
degrees F (430 degrees C). If horizontal runs over 20 feet or
other static-increasing transitions are necessary, a flue
booster fan will be required.
Install according to local codes.

Installing Rain Hood/Combustion Air Inlet

Rain hoods are only required on an outdoor unit with an
internal vestibule. The combustion air opening will be in
the side panel.
Rain hoods for the combustion air opening ship attached
to the side panel or ship loose and must be installed at the
job site. The assembly consists of the hood, butyl tape and
number 10 screws.
• Install butyl tape between the hood and the side panel
or door panel. See the following figure.
Figure 5. Installation of rain hood for combustion air
opening
• Locate the bottom edge of the hood 2 3/8 inches below
the bottom edge of the inlet air opening and center the
hood left-to-right over the inlet air opening. See the
following figure.
• Install the hood to the unit with number 10 screws.
14
Butyl tape
Hood
Figure 6. Center inlet air opening
Hinge
side
2 3/8 in.
Installing Flue Stack for Hurricane
Applications
Figure 7. Flue stack installation for hurricane
applications
Attach the gas
heat flue duct
to the L angles
on both sides
Note: When installing flue, leave enough clearance to
avoid roof's edge and anything above the roof.

Duct Connections

All duct connections to the gas heat section should be
installed in accordance with the standards of the National
Fire Protection Association (NFPA) and the Sheet Metal
and Air Conditioning Contractors National Association,
Inc. (SMACNA).

Combustion Air Duct

• Outdoor units have a rain hood that either ships
attached to the side panel or ships loose and requires
field mounting.
• All indoor units ship with a screened opening on the
combustion air inlet.
Access door
Rain hood
Airflow
Combustion
air opening
Center hood left-to-right
over opening
See note
Gas heat
flue
#10 x 3/4-in.
self-drilling
sheet metal
screws
L bracket
Right side view
CLCH-SVX014B-EN