Reznor RBL (Cabinet Blower) Unit Installation Manual - Manual (Page 4)

Form I-RBL, P/N163219R2, Page 4
4.0 Suspending and Mounting (cont'd)
Optional
Downturn Plenum
Blower
Cabinet
Curb
Cap
1-7/8”
(48mm)
Roof
Curb
16” (406mm)
1-7/8”
(48mm)
AC
D
Return
Duct
Supply
Duct
1-7/8”(48mm)
1-1/2”
(38mm)
Lift Holes
(4 corners)
B
* C and D are roof opening dimensions.
FIGURE 5 - Roof Curb Dimensions (inches/mm)
and Installation
16”
(406mm)
1-7/8”(48mm)
4”
(102mm)
2 x 6 Wood Nailer
1-1/2 x 3 lb
Fiberglass
Flashed by the
installer (flashing must
be under lip of curb)
Lag Screw
Cap
Screws
Curb Cap
Counter Flashing
(by installer)
Cant Strip
(by installer)
MUST be sealed
between curb cap
and roof curb
2 x 6
Wood
Nailer
Insulation
16”
(406 mm)
Curb Height
Cabinet
Curb Cap “Skirt”
Weld, bolt, or lag screw curb to deck structure.
Roof Curb
Roofing Felts
(by others)
Curb Section Curb Corner Detail
Curb
Detail
See
FIGURE 5.
Model RBL without Optional Downturn
Plenum - Roof Curb Option CJ1
Model RBL with Optional Downturn Plenum Cabinet
(Option AQ5 or AQ8) - Roof Curb Option CJ2
A 59-1/16" (1500mm) 82-1/16" (2084mm)
B 53-9/16" (1361mm) 28-13/16" (732mm)
C* 55-5/16" (1405mm) 78-5/16" (1989mm)
D* 49-13/16" (1265mm) 49-13/16" (1265mm)
Optional Roof Curb
Installation Instructions
(See FIGURE 8)
Filter racks and filters are optional equipment. Filters are 2" and may be either dispos-
able, permanent aluminum, or pleated disposable.
5.0 Mechanical 5.1.1 Filter Rack and Filters, Option AW7, AW9, or AW11
The curb is shipped unassembled. Field assembly and mounting on the roof are the
responsibility of the installer. Hardware to assemble the corners is supplied, Before
installing the roof curb, verify that the size is correct for the cabinet being installed.
1. Position the curb cross rails and curb side rails as shown in FIGURE 5. Fasten
curbing pieces at all corners with bolts and lag screws as shown in the Corner
Detail illustration.
2. Check the assembly for squareness. Adjust the roof opening so that the diagonal
measurements are equal within a tolerance of ± 1/8" (3mm).
3. Level the roof curb. To ensure a good weathertight seal between the integral curb
cap and the roof curb, the roof curb must be leveled in both directions with no twist
end to end. Shim level as required and secure curb to roof deck before proceeding
with flashing.
4. Install field-supplied flashing (See Curb Detail in FIGURE 5).
5. Before placing the unit on the curb, apply furnished 1/4" x 1-1/4" foam sealant tape
to the top surface of the curb, making good butt joint at the corners. The cabinet
must be sealed to the curb to prevent water leakage into the curb area due to
blown rain and capillary action.
5.1 Unit Inlet Air