Reznor ADFH Option - Installation - Roof Curbs Assembly - Manual (Page 32)

Form I-OPT-C, Page 32
7.1 Downflow Roof
Curbs
Both Option CJ31 and CJ34 are 16" (406mm) high roof curbs designed for vertical
(down) discharge. These curbs include integral cross supports for supply air and
optional return air ductwork.
Suppl
y
Air
Return Air
Downflow Curb Option CJ31 or
CJ34
2x6
Wood
Nailer
Insulation
16”
(406mm)
Cross-Section
View
(Control End of Unit)
(Inlet Hood End)
(Condenser Side of Unit - Base extends
30” / 761mm beyond this side of c
urb.)
Option Model and Size
Cabinet
Size
A B C D
E** F** G H
(Outside of Curb Rails) (Area Inside the Curb*)
CJ31
No Energy
Wheel
YDHA & YDMA, 060,
090, 120, 150
1
119-11/16
(3040)
43-7/16
(1103)
115-15/16
(2945)
39-11/16
(1008)
31
(787)
17
(432)
25-3/4
(654)
14-29/32
(379)
YDHA & YDMA, 180,
210, 240YDSA 120, 150
2
123-11/16
(3141)
50-11/16
(1287)
119-15/16
(3046)
46-15/16
(1192)
31
(787)
19
(483)
25-13/16
(656)
18-13/16
(478)
YDHA & YDMA, 300,
360 YDSA 180, 210
3
154-11/16
(3929)
63-11/16
(1618)
150-15/16
(3834)
59-15/16
(1522)
31
(787)
21
(533)
28
(711)
28-7/32
(717)
CJ34
With
Energy
Wheel
YDHA & YDMA, 060,
090, 120, 150
1
128
(3251)
43-7/16
(1103)
124-1/4
(3156)
39-11/16
(1008)
31
(787)
17
(432)
25-3/4
(654)
23-1/4
(591)
YDHA & YDMA, 180,
210, 240; YDSA 120,
150
2
132
(3353)
50-11/16
(1287)
128-1/4
(3257)
46-15/16
(1192)
31
(787)
19
(483)
25-13/16
(656)
27-1/8
(689)
YDHA & YDMA, 300,
360; YDSA 180, 210
3
154-11/16
(3929)
63-11/16
(1618)
150-15/16
(3834)
59-15/16
(1522)
31
(787)
21
(533)
28
(711)
28-7/32
(717)
FIGURE 13A - Layout, Dimensions, and Weights of Option CJ31 & CJ34 Roof Curbs
Dimensions for Options CJ31 & CJ34 - inches (mm)
Curb
Layout
* Area enclosed by the 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. NOTE: If installing a unit with a high
efficiency, condensing gas-fired heat section, the area within the curb must be left open.
** When cutting only duct openings, cut “E” & “F” dimensions 1/4” (6.4mm) in from duct opening to allow clearance. Cut the curb
rail sides of the duct opening(s) parallel to the curb rail. For Cabinet Size 1, measure a maximum of 1-1/2” (38mm) from the side
rail. For Cabinet Size 2, measure a maximum of 3/4” (19mm) from the side rail. For Cabinet Size 3, measure a maximum of
1-1/4"(32mm) from the side rail.
7.0 Roof Curbs for
Models YDHA,
YDMA, YDSA
Two styles of curbs are available. Option CJ31 and CJ34 in Paragrapgh 7.1 are for
downflow air applications. Option CJ48 and CJ55 in Paragraph 7.2 are for horizontal
air flow applications.
Return
Air
(DxF)
Supply
Air
(DxE)
Unit
Airflow
A
B D
E F
Top View
C
H G
Weights of Downflow Roof Curb Option CJ31 and CJ34 by Cabinet Size
Roof
Curb
Cabinet 1 Cabinet 2 Cabinet 3
lbs kg lbs kg lbs kg
Option
CJ31
237 108 257 117 322 146
Option
CJ34
248 112 268 122 322 146