Reznor ADFH Option - Installation - Roof Curbs Assembly - Manual (Page 6)

Form I-OPT-C, Page 6
1.0 Roof Curbs for
MAPS ® Cabinets
A, B, C (cont'd)
1.2 Curb for Vertical (Down) Airflow WITH an Optional Energy Recovery
Module, Option ER1A, ER1B, ER1C (Roof Curb Option CJ34) (cont'd)
Option CJ34 Roof Curb Corner Hardware (See FIGURE 2B)
For Top Two
"Holes"
(16) 5/16" x 1" Lag Screws, P/N 16243; (16) 5/16" Lockwasher, P/N 1333
For Bottom
Two "Holes"
(16) 5/16" x 3/4" Hex Head Cap Screw, P/N 16247; (16) 5/16" Lockwasher, P/N 1333;
(16) 5/16-18 Hex Nut, P/N 1035
Hardware to Assemble and Attach Dividers to make Duct Connections and Sealant Tape for Top of
Rails: (75) #10 Sheetmetal Screws, P/N 11813; (1) 1/4" x 1-1/4" x 50' Foam Sealant Tape,
P/N 66302
Installation Instructions
for Down Discharge
Roof Curb, Option
CJ34, for MAPS ®
Cabinet Sizes A, B,
and C WITH Energy
Recovery Module,
Option ER1
6. Before placing the MAPS ® unit or energy recovery module on the curb:
□
If ductwork is being installed from the top, slide the ductwork down into the discharge and return air openings.
Ductwork should be sized slightly smaller with a minimum 3/4" duct flange that will rest on and be attached to all
sides of the duct connection. See the system installation manual for ductwork requirements.
□
Apply 1/4" x 1-1/4" foam sealant tape to both the top surface of the curb rails and the top surface of the perimeter of
the integral dividers, being sure to make good butt joints at all corners. The sealant tape must be applied to prevent
water leakage into the curb area due to blown rain and capillary action.
7. Lift the MAPS ® unit on to the prepared curb (See Rigging and Lifting in the unit installation manual, Form
I-MAPSIII&IV). IMPORTANT: Verify that the unit will be placed in the correct airflow orientation to mate properly
with the discharge and return air openings.
8. After the MAPS ® unit is in place, follow the instructions shipped with the energy recovery module
(Form I-MAPSIII&IV-ER) to lift and mate the energy recovery module to the MAPS ® unit.
9. Refer to the MAPSIII&IV installation manual and start up information to complete the installation.
14”
(356mm)
1-7/8”(48mm)
4”
(102mm)
2 x 4 Wood
Nailer
1-1/2 x 3 lb
Fiberglass
Flashed by the
installer (flashing
must be under lip
of curb)
Lag Screw
Cap
Screws
Curb Detail
Corner Detail
Curb Section
1. Assemble the MAPS ® Unit Curb Section (Refer to FIGURE 2A, page 5)
a) Position the ends and sides ( Codes B, B, A, and J ) of the MAPS ® section of the
curb as shown in the drawing in FIGURE 2A. Fasten with bolts and lag screws
as illustrated in the corner detail ( FIGURE 2B).
b) Install bottom opening ductwork. Use the sheetmetal screws to attach the
dividers ( Codes C1, C2, D1, D2, E, & F in FIGURE 2A). Attach the return air
duct angles ( Codes G & H) to the attached end and side and to the roof curb.
NOTE: If the system does not have a return air opening, Codes F, G, & H may
be installed in the curb but are not required.
2. Assemble the Energy Recovery Curb Section
a) Position the sides ( Codes L and M ) as shown in the drawing in FIGURE 2A.
Attach the sides to the assembled curb section with sheetmetal screws.
b) Attach the curb end ( Code A ). Fasten with bolts and lag screws as illustrated in
the corner detail ( FIGURE 2B) .
c) Position the tunnel ( Code K ) over the opening in the center. Attach with sheet-
metal screws.
3. Check the roof curb for squareness. The curb must be adjusted so that the
diagonal measurements are equal within a tolerance of ±1/8” (±3mm).
4. Level the roof curb. To ensure a good weatherproof seal between the unit curb cap
and the roof curb, the roof curb must be leveled in both directions with no twist end
to end. Shim as required and secure curb to the roof deck before installing flashing
(See Curb Detail in FIGURE 2B).
5. Install field-supplied flashing.
FIGURE 2B - Option
CJ34 Downflow Roof
Curb Cross Section and
Corner Detail
MUST be sealed
between curb cap
and top of curb
Cabinet
2x4 Wood Nailer
Counter Flashing
(by installer)
Cant Strip
(by installer)
Weld, bolt, or lag screw curb to deck structure.
Roofing Felts
(by others)
Insulation