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.
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).
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.
Exhaust
Supply
Combination Extension
3. Install Ductwork
1 inch Inside Flange
Complete Rooftop Installation
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.
Roof Curb
Metal Cover
Equipment
Support
Roof Curb and Equipment Support
NOTE
Refer to Outdoor Venting instructions when locating the unit.
®
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.
Exhaust
Ductwork by Others
Supply
Ductwork by Others
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.
Model IG / IGX
