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Pre-Installation
Gas Heat Sections Upon Arrival at Jobsite
Gas heat sections arrive at the jobsite with an integral baseframe for the purpose of mounting units
to a housekeeping pad or roof curb. The baseframe variables in height from the standard 2.5-
inches to 8 inches.
The gas heat section is designed with the necessary number of lift points for safe installation. The
lift points are designed to accept standard rigging devices and are removable after installation.
Indoor sections size 3-30 will also be shipped with a shipping skid designed for forklift transport.
Outdoor gas heat sections ship with wooden blocks fastened under the base channel. The blocks
elevate the section for shipping protection and ease of handling. Leave the wooden blocks attached
until the section is placed in its final position to avoid bending the base channel during rigging and
handling.
Flue Stack for Outdoor Air Handler
A stainless-steel flue stack is provided with outdoor air handlers. It ships inside the gas heat section
and must be mounted on the flue opening on the side of the unit. The flue stack must be installed
on the gas heat section before assembling the gas heat section to the air handler.
Note: It is very difficult to remove the flue from inside the unit once the unit is assembled.
Flue Stack for Indoor Air Handler
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.
NOTICE:
Equipment Damage!
Do NOT use type B flue stacks with this product as they are not suitable for the flue gas
temperatures. Using a Type B flue stack could result in equipment or property damage.
Protective Covering
The large openings of the gas heat section are protected by an Oriented Strand Board (OSB) panel
covering. The OSB panel is held in place by sheet metal screws. Leave the covering attached to the
section until it is ready to install to prevent debris from entering the section.
Hardware Kits
Hardware kits ship inside the air handler fan section in a plastic bag or cardboard box. This kit
contains gasketing and screws. For outdoor units, roof joint connection strips and wall panel seam
caps are included. These are used when fastening the gas heat section to the air handler. Keep the
hardware with the gas heat section until it is ready to install.
Rain Hood
A rain hood is provided for outdoor units with internal vestibules. The rain hood is shipped on a
separate wood skid. A kit containing mounting hardware ships inside the gas heat section and must
be removed before assembly to the air handler.
Instruction Manuals
Individual instruction manuals for all of the gas train components (such as flame-control relay
valves, pressure switches, and actuators) ship inside the piping vestibule. Retain these manuals for
future repair or troubleshooting.
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CLCH-SVX08A-EN
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