Additional Clearances For Packaged; Handling Concerns For Units With Package - LG GEN2 Series Installation And Operation Manual

Installation
Additional Clearances for
Packaged DX Units
Packaged DX units require additional clearance because
they must have unrestricted air movement around the
condenser coil and condenser fans. Hot air is being
discharged from the condenser fans during operation.
Enough clearance must be provided to avoid recirculation
or coil starvation. When equipped with condenser coils,
the unit should never be placed under an overhang or
inside a building. A minimum of 48 inches above the
condenser fans is acceptable, but unobstructed is
strongly recommended.
Minimum 48 inches clearance
End view of rooftop unit with Packaged DX
Additional Clearances for
Air Source Heat Pump
IMPORTANT
Air-Source heat pumps are equipped with a
defrost cycle to remove ice from the outdoor coil.
During defrost cycles; melted water may drip
from the bottom of the refrigeration section under
the outdoor coil. In cold climates, proper
drainage/heat tape must be installed under the
outdoor coil to prevent the buildup of ice on the
roof.
Air-source heat pump units require additional clearance as
they must have unrestricted air movement around the
outdoor coil and fans. Enough clearance must be provided to
avoid recirculation or coil starvation. Air-source heat pump
units should never be placed under an overhang or inside a
building. A minimum of 48 inches above the outdoor fans is
acceptable, but unobstructed is strongly recommended.
Handling Concerns for
Units with Packaged DX or Air-Source Heat Pump
Units with PDX or ASHP have a system that is pressurized with
refrigerant. If damage occurs, the refrigerant could leak into the
atmosphere or cause bodily harm due to the extreme cold
nature of expanding refrigerant. Use protective equipment such
as gloves and safety glasses to minimize or prevent injury in
case of a system leak during installation.
Before Lifting
Before lifting, be sure that all shipping materials have been
removed from the unit.
Vestibule
Determine whether or not the unit has a vestibule that must be
field-attached to the side of the unit. Vestibules are shipped
assembled but detached from the unit.
They have lifting lugs on them so they can also be lifted by
crane, but the installed location of the unit may make it
preferable to install the vestibule on the unit prior to lifting.
Field Power Access
Determine where high voltage and low voltage wiring is to be
brought into the cabinet. If wiring is to be brought into the cabinet
through the floor, see Alternate Supply Entry Locations in this
manual. If unit is to be installed on a roof, cut access openings in
the roof deck as needed.