24
IM 738-2
Mechanical Installation:
Roof Curb Assembly and Installation
Figure 29. RPS/RFS roof curb assembly
Note:
These dimensions do not apply to units with energy recovery wheels.
Equal Length
Side Supports
L
Using remaining side supports
in this area, align lengths on
opposite sides of assembly
and install a cross support
“D” at each side.
D
M
L
M
D
Return
Air
F
B
F
E
“X”
Inside
Inside
85"
62.8"
A
B
E
“Y”
“X”
D
See Detail “A”
38.8"
C
G
G
C
H
H
A
K
76"
Inside
6.8"
1.5"
7.5"
2"
Condenser
Section Support
Supply
Air
Detail B
1
2
8
9
6
4
7
9
3
9
5
4
Condenser
section
support
(RPS only)
Note:
Height of perimeter curb and
condensing section support are not equal.
Main
5
9
4
3
7
2
1
8
6
1. Unit Base
2. Curb Gasketing
3. 2 x 4 Nailer Strip
4. Galvanized Curb
5. Cant Strip (not furnished)
6. Roofing Material (not furnished)
7. Rigid Insulation (not furnished)
8. Counterflashing (not furnished)
9. Flashing (not furnished)
“W”
inside
“Y”
unit curb
Detail C
Table 6: Roof curb assembly dimensionsRPS/RFS dimensions
Unit size
Fan
X
Y
XX
YY
Unit size
Z
W
in
mm
in
mm
in
mm
in
mm
in
mm
in
mm
015–040C
None
24.0
610
82.0
2083
6.8
173
1.5
38
015C–030C
45.9
1165
20.0
508
(2) 15” FC
24.0
610
82.0
2083
6.8
173
1.5
38
036C and
040C
94.0
2388
20.0
508
30" AF
30.0
762
76.0
1930
6.8
173
4.5
114
045C–075C
77.0
1956
28.0
712
40" AF
36.0
914
78.0
1981
14.8
376
3.5
89
80C–90C
113
2870
38.0
965
045C–075C
All units
38.0
965
87.0
2210
8.8
222
3.5
89
105C—135C
113
2870
46.0
1168
80C–135C
All units
62.0
1575
87.0
2210
8.8
222
3.5
89
Summary of Contents for RDT-135c
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