3
Fig. 3 — CRRFCURBXB3AA1 — Roof Curb with
Equipment Support Example
4. Square up roof curb and position over duct openings cut
in roof. Level the roof curb by placing shims under the
bottom flange of the curb as needed. See Fig. 4 for unit
leveling illustration.
5. Secure roof curb in place by welding or screwing curb to
the roof structure. Follow all local and other applicable
codes.
6. Roof-in curb as shown in Fig. 5 or other approved
method.
7. Install duct in curb duct openings per unit instructions.
Duct MUST be installed before unit is placed on roof
curb.
8. Install provided gasket on top of roof curb around outer
perimeter and around duct openings in curb. Gasket
strips must fit tightly together to leave no gaps for leak-
age. See Fig. 5.
Fig. 4 — Unit Leveling Tolerances
Fig. 5 — Roof Curb Weather Proofing
(Flashing Roof-in Method Shown)
CAUTION
EQUIPMENT DAMAGE HAZARD
Failure to follow this warning could result in property dam-
age.
Do not slide unit into position when it is sitting on the curb.
Curb gasketing material may be damaged and leaks may re-
sult.
56
3
/
4
"
66
1
/
8
"
166
7
/
16
"
ROOF CURB
EQUIPMENT
SUPPORT
BACK
ROOF CURB
ROOF CURB
RETURN END
CHECK 62X
INSTRUCTIONS
CHECK 62X
INSTRUCTIONS
GASKET
NAIL
COUNTER FLASHING
(FIELD SUPPLIED)
ROOFING FELT
(FIELD SUPPLIED
CANT STRIP
(FIELD SUPPLIED)
ROOFING MATERIAL
(FIELD SUPPLIED)
RIGID INSULATION
(FIELD SUPPLIED)