5
Figure 3. Side View
Wood Cap
Assembly
Top Crate
Brackets
Lower
Crate
Brackets
End Skid
Side Skids
Figure 4. Bottom View
Crate Brackets (x4)
Long Bottom
Boards (x2)
Short Bottom
Boards (x2)
Base
Rails
Figure 5. Rigging & Hoisting
LIFTING
BEAM
CABLE OR CHAIN
SPREADER
BAR
SPREADER
BAR
BASE
RAIL
BASE
RAIL
Units may be installed on wood flooring or on Class A, B,
or C roof covering material when used with side supply
and return air ducts. (Horizontal Discharge Kit required.)
Units may be installed on wood flooring or on Class A,
B, or C roof covering material when used with bottom
discharge and return air ducts in conjunction with a roof
curb.
If installing units on a combustible floor with
downflow discharge, a roof curb is required.
Units may be installed on non- combustible flooring when
used with bottom supply and return air ducts.
Rooftop Mounting
For rooftop installations use the appropriate accessory roof
curb (Figure 6, page 6) and follow all instructions included
with it. Locate the unit according to local building codes
and ordinances. The roof curb must be square and level
to ensure proper condensate drainage and unit operation.
• On bottom discharge applications, supply and return air
ducts must be attached to the roof curb duct supports,
not the unit. Install all ductwork before setting unit to
curb or frame.
NOTE:
For downflow applications never
drill or punch holes in unit base. Leakage may occur if
unit bottom pan is punctured.
• If any brand other than a NORDYNE Roof Curb is to
be used the frame support must be constructed using
non-combustible materials.
• Units require full perimeter support under the unit.
Supports must be made of steel or suitably treated
wood materials. The unit must be square and level to
ensure proper condensate drainage.
• The roof must be capable of handling the weight of the
unit. See Table 1 (page 18) for unit weights. Reinforce
the roof if required.
• Frame must be high enough to ensure prevention of
any moisture from entering the unit. Recommended
height to unit base is 8” (20cm) for both Downflow and
Horizontal applications.
• Secure roof curb or frame to roof using acceptable
mechanical methods per local codes.
WARNING:
Do not place combustible material on or against
the unit cabinet. Do not place combustible
materials, including gasoline and any other
flammable vapors and liquids, in the vicinity
of the unit.
Ground Level
If installing the unit at ground level, provide a concrete
mounting pad (Figure 7) separate from the building
foundation. The pad must be level to ensure proper
condensate disposal and strong enough to support the
unit’s weight. Make sure the slab is a minimum of 3” (8cm)
above grade and in an area that drains well.
Ductwork should be attached directly to flanges on panels
supplied in horizontal duct conversion kits. Unit Base Rails
provide full perimeter support under the unit. The unit
