Reznor R6GN Unit Installation Manual - Manual (Page 10)

10
Top of unit
to be
unobstr
ucted
Recommended Clearances
for Servicibility
Minimum Required
Clearances to Combustibles
36"
36"
48"
36"
48"
72"
48"
48"
Figure 5. Unit Clearance Requirements
Rooftop Mounting
Rooftop installations must be located according to local
building codes or ordinances and these requirements:
• The roof must be capable of handling the weight of the
unit. For unit weights, see Table 3 (page 25). Reinforce
the roof if necessary.
• The appropriate accessory roof curb (Figure 6) must be
installed prior to unit installation. The roof curb must be
square and level to ensure proper condensate drainage.
Please follow all instructions provided with the kit.
WaRNING:
Never drill or punch holes in unit base when installing
downflow units. Leakage may occur if bottom pan
is punctured
.
• On bottom discharge applications, the supply and return
air ducts must be attached to the roof curb duct supports,
not the unit. Install all ductwork before setting unit on
curb or frame.
Figure 7. Concrete Mounting Pad
3” min
Horizontal
Roof Curb
Horizontal
Retur
n
Air Opening
Horizontal Supply
Air Opening
3” min
Figure 6. Horizontal Roof Curb
Horizontal
Retur
n
Air Opening
Horizontal Supply
Air Opening
Horizontal
Roof Curb
Minimum Clearance Requirements
R6GN units are certified as combination heating and
cooling equipment for outdoor installation only. Figure 5
displays the minimum clearances to combustible materials
for both downflow and horizontal discharge.
R6GN units may be installed on wood flooring or on
Class A, B, or C roof covering material when used with
bottom supply and return air ducts as long as the following
requirements are met:
• If using horizontal supply and return air ducts, the
horizontal roof curb kit and return air kit must be installed
prior to unit installation. Horizontal roof curb is required.
• If using bottom discharge with return air ducts a roof curb
must be installed prior to unit installation. See Rigging
and Hoisting section (page 9) for setting of the unit.
• Frame support must be constructed using non-
combustible materials. Full perimeter support is required
under the unit. Supports must be made of steel or weather
resistant wooden materials. The unit must be square
and level to ensure proper condensate drainage.
• The 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 installations.
• Secure roof curb or frame to roof using acceptable
mechanical methods per local codes.
Ground Level
Ground level installations must be located according to
local building codes or ordinances and these requirements:
• Clearances must be in accordance with those shown
in Figure 5.
• A concrete mounting pad (Figure 7) must be provided
and separate from the building foundation. The pad
must be level to ensure proper condensate disposal
and strong enough to support the unit’s weight. The slab
height must be a minimum of 3” (8cm) above grade and
with adequate drainage.
• Units require horizontal roof curb and return air kit for
horizontal installations.
• Ductwork should be attached directly to flanges on
panels supplied in horizontal duct conversion kits.