Installation of
Arrangement DB / HZ / UB
1.Install Curb and/or 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 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
2. 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 all local codes. Reference the CAPS submittal for ductwork sizes.
NOTE
The use of a duct adapter is recommended on a downblast (DB) arrangement to align the ductwork with the supply unit. The duct adapter is only a guide and is not to be used as a support for the ductwork.
3. Apply Sealant
Apply an appropriate sealant around the perimeter of
the curb | Supply Air Ductwork | |
and duct | ||
(Arrangement DB only) | ||
adapter(s) |
| |
to isolate |
| |
fan |
| |
vibration |
| |
and prevent | Sealant |
water
penetration.Ductwork
4. Install Unit
Use a crane and a set of spreader bars hooked to the factory lifting lugs to lift and center the unit on the curb/equipment support(s).
Use
Setting 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.
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 of 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.
Complete Rooftop Installation
4 | Model MSX | ® |
