Manufacturer reserves the right to change specifications or designs without notice.
10.2019
Air Handler Unit Installation Instruction
3/20
WARNING
If removal of the blower assembly is required, all switches supplying power to the equipment must be
disconnected and locked so the field power wires can be safely removed from the blower assembly.
Failure to do so can cause electrical shock resulting in personal injuring or death.
Make sure the blower motor support is tight (3-motor mount bolts),
then check if the wheel is secure to motor shaft before operating unit.
The first 6 inches of supply air plenum and ductwork must be constructed of sheet metal as required by
NFPA 90B. The supply air plenum or duct must have a solid sheet metal bottom directly after the air
handler unit with no openings, registers or flexible air ducts located in it. If flexible supply air ducts are
used, they may be located only in the vertical walls of rectangular plenum, a minimum of 6 inches from
the solid bottom. Metal plenum of duct may be connected to the combustible floor base, if not, it must be
connected to the unit supply duct exposed to the supply air opening from the down-flow unit.
Exposing combustible (non-metal) material to the supply opening of a down-flow unit may cause a fire
resulting in property damage, personal injury or death.
