Reznor RDF Unit Installation Manual - Manual (Page 7)

I-RDF, PN148384R5, Page 7
FIGURE 4 - Dimensions of
Optional Roof Curb (Option
CJ3) - Shipped Separately
IMPORTANT NOTE:
Area enclosed by roof curb
must comply with clearance to
combustible materials. If the roof
is constructed of combustible
materials, area within the roof
curb must be ventilated, left open,
or covered with non-combustible
material which has an "R" value of
at least 5. If area within curb is left
open, higher radiated sound levels
may result.
B
A
C
D
1-7/8(48)
1-7/8(48)
1-7/8
(48)
Roof Curb
Ductwork for
Bottom
Discharge
(Option AQ1
or AQ3)
Roof Curb
Ductwork for
Optional Return
Air
Airflow
(See IMPORTANT
NOTE on the left.)
NOTE: Drawing is
not proportional for
all sizes.
Roof Curb Dimensions (± 1/8" or 3mm) and Approximate Weights
Sizes 1-20-3, 1-40-3, 1-50-3, 1-65-3 2-80-3, 2-120-3 3-180-3, 3-260-3
inches mm inches mm inches mm
A 84-5/8 2149 84-5/8 2149 131-3/4 3346
B 43-5/8 1108 67-9/16 1716 82-1/16 2084
C 80-7/8 2054 80-7/8 2054 128 3251
D 39-7/8 1013 63-13/16 1621 78-5/16 1989
Height 16 inches (406 mm)
Weight 171 lbs (78 kg) 224 lbs (102 kg) 307 lbs (139 kg)
Components in Roof Curb Option CJ3
Roof Curb Frame and Internal Ductwork Dividers (See FIGURE 4.)
Item Qty Description
1 2 Curb Front and Back Assemblies
2 2 Curb Side Assemblies
3 4
Full Width Curb Dividers -- two (2) for bottom discharge supply air
duct opening and two (2) for optional return air duct opening
4 2 Cross Dividers for Bottom Discharge Supply Air Opening
5 2 Cross Dividers for Optional Return Air Opening
Roof Curb Corner Hardware
For Top Two
"Holes"
8 5/16" x 1" Lag Screws, P/N 16243
8 5/16" Lockwasher, P/N 1333
For Bottom
Two "Holes"
8 5/16" x 3/4" Hex Head Cap Screw, P/N 16247
8 5/16" Lockwasher, P/N 1333
8 5/16-18 Hex Nut, P/N 1035
Hardware to Assemble and Attach Dividers to make Ductwork Openings
Qty of 64 #10 Sheetmetal Screws, P/N 11813
Components in
Option CJ3 Roof Curb
(Refer to FIGURE 4 to
identify the Item)
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
Corner
Detail
Curb
1. If installing an Option CJ3 curb, follow these instructions. If installing a field-
supplied curb, the curb must be level and must be sealed to the system curb cap.
2. Position the roof curb end assemblies and side assemblies as shown in the
drawing in FIGURE 4. Fasten with bolts and lag screws as illustrated in the corner
detail ( FIGURE 5).
Roof Curb Installation
Instructions
FIGURE 5 - Option
CJ3 Roof Curb Cross
Section and Corner
Detail