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5
Exhaust
Supply
1 inch
Inside
Flange
Metal Cover
Equipment
Support
Roof Curb
Roof Curb and Equipment Support
Complete Rooftop Installation
5. Assemble and Attach Weatherhood
The weatherhood can now be assembled and
attached to the unit. Detailed assembly instructions
can be found with the weatherhood. If the optional
evaporative cooling module was selected, this step
does not apply, refer to the installation instructions
for the Optional Evaporative Cooling Module section,
page 7.
6. Seal Weatherhood Seam
Using an appropriate sealant, seal the seam between
the weatherhood and the unit.
NOTE
The use of all lifting lugs and a set of spreader bars
is mandatory when lifting the unit.
NOTE
Some units come with the weatherhood attached
and step 5 may not apply.
Installation of Roof Mounted Unit
Arrangement DBC
1. Install Curb/Equipment Support(s)
Position curb/equipment support(s) on the roof
(reference the CAPS submittal for placement of curb/
equipment support(s) in relation to the unit). Verify
that all unit supports are level, shim if necessary.
Attach curb to roof and flash into place. Attach the
equipment support(s) to the roof, remove metal cover,
flash to wooden nailer and reinstall cover.
Ductwork
NOTE
The use of a duct adapter is recommended on a
downblast (DBC) arrangement to align the ductwork
with the supply unit. The duct adapter is only a guide
and is not to be used as support for the ductwork.
NOTE
Refer to Outdoor Venting instructions when locating
the unit.
Combination Extension
2. Install Combination Curb Adaptor
Install combination curb adaptor over curb, use wood
screws to lag in place. Locate extension so the tall
louvered side is over the exhaust opening, as shown
in illustration. Caulk extension to combination curb
adaptor. Fasten extension to curb adaptor with #12
sheet metal screws (field provided).
Supply
Ductwork
by Others
Exhaust
Ductwork
by Others
3. Install Ductwork
Good duct practices should be followed for all
ductwork. All ductwork should be installed in
accordance with SMACNA and AMCA guidelines,
NFPA 96 and any local codes. Reference the CAPS
submittal for ductwork size and location.
®
Model IG / IGX Make-Up Air