Roof Curb - Reznor RDF 1-20-3 Manual

FIGURE 4 - Cross Support
Mounting Requirements
Mounting on a

Roof Curb

Roof Curb
Dimensions for
Model RDF Series 3
FIGURE 5 - 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-combus-
tible material which has an
"R" value of at least 5. If
area within curb is left
open, higher radiated sound
levels may result.
NOTE: Drawing is
not proportional for
all sizes.
Field
Supplied
Duct
4 x 4 Treated Lumber
= support location
CAUTION: Before installing curb, recheck to be sure that the
correct curb has been ordered. Be sure that the curb selected
matches the unit ordered. Verify the dimensions of the curb
received with the dimension table in FIGURE 5.
Whether the roof curb is Option CJ3 designed for the system or a field-sup-
plied curb, the roof curb dimensions in FIGURE 5 and the ductwork opening
dimensions in FIGURE 7 apply.
The roof curb designed for the system includes dividers that will create internal
ductwork and duct connection flanges for ease of installation and so that the
building ductwork can be attached before the system is set on the roof curb.
Roof Curb Dimensions (± 1/8" or 3mm) and Approximate Weights
Sizes 1-20-3, 1-40-3, 1-50-3, 1-65-3
inches
84-5/8
A
43-5/8
B
80-7/8
C
39-7/8
D
Height
171 lbs (78 kg)
Weight
2-80-3, 2-120-3
mm inches
2149 84-5/8 2149
1108 67-9/16 1716
2054 80-7/8 2054
1013 63-13/16 1621
16 inches (406 mm)
224 lbs (102 kg)
Form I-RDF, P/N 148384 (Rev 1), Page 7
Field
Supplied
Duct
3-180-3, 3-260-3
mm inches mm
131-3/4 3346
82-1/16 2084
128 3251
78-5/16 1989
307 lbs (139 kg)