With Optional Mixing Box - Greenheck IGX Installation, Operation And Maintenance Manual

Installation Instructions for:
Roof Mounted with Optional Mixing Box
Arrangements HZ and DB
Step 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.
When attaching the equipment support(s) to the roof,
remove metal cover, flash to wooden nailer and
reinstall cover.
Step 2 Install Ductwork
Good duct practices should be followed for all
ductwork All ducts should be done in accordance
with SMACNA and AMCA guidelines.
Arrangement DB: The use of a duct adapter is
recommended on a downblast arrangement to
properly align the ductwork with the supply unit.
The duct adapter is only a guide and is not
intended to be used as support for the ductwork.
Attach and secure the ductwork using self tapping
screws.
Greenheck recommends attaching ductwork to
collar using a rubber duct section at the unit to
minimize vibration.
Step 3 Apply Sealant
Before installing unit, apply a sealant around the
perimeter of the return air duct and supply duct
adapter to seal and isolate the fan and minimize
vibration. Note: Supply duct adapter applies to
arrangement DB only.
Step 4 Install Unit
Use a crane and a spreader bar hooked to the
factory lifting lugs (as shown in the diagram) to lift
and center the unit on the curb/equipment
support(s).
NOTE: THE USE OF ALL LIFTING LUGS IS
MANDATORY WHEN LIFTING UNIT.
Use self-tapping sheet metal screws to fasten unit
to the curb/equipment support(s).
Step 5 Assemble and Attach Weatherhood
The weatherhood can now be assembled and attached to the installed unit.
Assembly instructions are included with the weatherhood panels. If the optional
Evaporative Cooling module was selected, this step does not apply. Reference
the Installation Instructions for the Evaporative Cooling module.
Supply Air
(Arrangement DB only)
Mixing Box
(Arrangement HZ and DB)
5
Metal Cover
Equipment
Support
Use spreader bar
and lifting lugs.
Figure 2A