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Mechanical Installation
Figure 18: RAH Roof Curb Assembly Instructions
Detail A
L
Equal Length
Side Supports
"X"
Inside
E
8.75"
(222mm)
3.50"
(90mm)
87.00"
(2210 mm)
Inside
90.00"
(2286 mm)
Figure 19: Roofing Detail "B"
Curb gasketing
Rigid insulation
(not furnished)
Galvanized
curb
Main unit
curb
18
Using remaining side supports
in this area, align lengths on
opposite sides of assembly
M
and install a cross support
"D" at each side.
D
M
L
B
D
F
F
Return
Air
A
E
Unit base
2 × 4 nailer strip
Counterflashing
(not furnished)
Flashing (not furnished)
Cant strip
Roffing material
(not furnished)
(not furnished)
3.50"
(90 mm)
8.75"
(222 mm)
"Y"
Inside
G
C
H
D
B
94.75"
(2407 mm)
047C
077C with flat cooling coil and /or 44"
SWSI plenum supply fan
077C with staggered or no cooling coil,
and/or 49" SWSI plenum supply fan
81.00"
(2057 mm)
Inside
A
H
Supply
Air
G
C
70.75"
(1797 mm)
See Detail "A"
RAH unit
7.50"
(191 mm)
2.00"
(51 mm)
Dimensions
X
Y
in
mm
in
mm
38
965
28
711
157
62
38
965
5
157
62
46 1168
5
McQuay IM 987
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