Reznor RECC Unit Installation Manual - Manual (Page 14)

Form I-MAPSIII&IV, Page 14
5.4.1.2 Roof Curb for MAPS ® III&IV A, B, and C Cabinet with Vertical (Down) Airflow WITH an
Optional Energy Recovery Module, Option ER1A, ER1B, ER1C (Roof Curb Option CJ34)
Roof Curb P/N by Model/Size
See Model
Size / Cabinet
Size Cross
Reference on
pages 71-72.
Cabinet A Cabinet B Cabinet C
RCB/RCC/RDB/RDC w/Option ER1 - All Cabinet A - - All Cabinet B 190, 216, 248,
262, 272, 288
-
298, 410, 354,
370, 468, 482
-
RDCB/RDCC/RDDB/RDDC w/Opt ER1 100 150 200 250 300 400 500 600 700
RECB/REDB/RECC/REDC w/Opt ER1 - All Cabinet A - - All Cabinet B - - All Cabinet C -
Roof Curb (Option CJ34) Package P/N 262478 262479 262480 262481 262482 262483 262484 262485 262486
Code (FIGURE 8A) Component Description: Qty Component P/N's
A Curb Ends (unit & ER end) 2 204486 204487 208799
B Curb Sides (under unit) 2 204485 208798
C1 Supply Air Duct End 1 204431 204432 207961 207960 207959 207958
C2 Supply Air Duct End 1 204431 204432 207965 207964 207963 207962
D1 Supply Air Duct Side 1 204433 204434 204436 204435 204437 207967
D2 Supply Air Duct Side 1 204433 204434 204436 204435 204437 207967 207971
E Return Duct End 1 204438 204439 207966
F Return Duct Side 1 204440 204441 207974
G Return Duct Side Angle 1 204444 207973
H Return Duct Rear Angle 1 204442 204443 207972
J Curb End (unit end in center) 1 261995 261996 260855
K Tunnel (between unit & ER) 1 261993 261994 260856
L Right Curb Side (under ER) 1 262411 262418
M Left Curb Side (under ER) 1 262412 262419
A
B
B
C1
C2
D2 E
F
G
H
D1
A
J
K
L
M
(2 per each corner)
1” Lag Screw and
Lockwasher
(2 per each corner)
3/4” Hex Head
Cap Screws with
Lockwashers & Nuts
Curb Section for
Energy Recovery
Module
Curb Section for
MAPS Unit
FIGURE 8A - Roof Curb Components and Layout
for MAPS ® Cabinets A, B, and C with Energy
Recovery Option ER1
NOTES:
•
Curb in FIGURE 8A applies to a MAPS ® unit with an optional
energy recovery module. For downflow curb without an
energy recovery module (Option CJ31), go to Paragraph
5.4.1.1 page 11.
•
All curbs include corner hardware as listed below and
screws for attaching duct pieces.
•
Integral ducts are designed so that ductwork may be either
inserted down from the top or attached from the bottom.
•
Apply sealant tape to tops of supply air "dividers" (C & D)
that mate with the blower or heat exchanger opening.
•
Apply sealant tape to tops of return air "dividers" (E, F, G, H).
•
Apply sealant tape to tops of all curb rails.
•
Curb MUST be level.
5.4 Mounting on a Roof Curb (cont'd) 5.0 Mounting
(cont'd) 5.4.1 Downflow Roof Curbs for MAPS ® III Cabinets A, B, C (cont'd)
Option CJ34 Roof Curb Corner Hardware (See FIGURE 8B)
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
1. Assemble the MAPS ® Unit Curb Section
a) Position the ends and sides ( Codes B, B, A, and J ) of the MAPS ® unit section
of the curb as shown in the drawing in FIGURE 8A. Fasten with bolts and lag
screws as illustrated in the corner detail ( FIGURE 8B).
b) Install bottom opening ductwork. Use the sheetmetal screws to attach the
dividers ( Codes C1, C2, D1, D2, E, & F ). 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.