Reznor ADFH Option - Installation - Roof Curbs Assembly - Manual (Page 16)

Form I-OPT-C, Page 16
2.0 Roof Curbs for Models RCB, RDB, RDCB, RDDB, RECB, REDB Cabinet Size D (cont'd)
Installing Ductwork
with Option CJ3
MAPS ® III Cabinet D
Roof Curb
The roof curb designed as an option for MAPS ® Cabinet D includes return air and dis-
charge duct supports that allow the ductwork to be inserted down through the roof. The
sizes of the duct openings are shown in FIGURE 5E. Ductwork should be sized slightly
smaller with a minimum 3/4" duct flange that can be attached to all sides of the duct
connection. The duct opening is positioned to mate with the heater inlet or discharge.
After installing the ductwork, before placing the system on the curb, apply sealant tape
to the top surface of the duct opening sides making good butt joints at the corners.
(Sealing tape must also be applied to the curb rails.)
See unit installation manual for additional information on ductwork.
Cabinet D MAPS ® III Models and Cooling Sizes
with Gas Heat
Section
with Electric
Heat Section
Illustration Codes - FIGURE 5D Approx
Curb Wt X Y Z
Dimensions - inches lbs
RCB 360, 480, 600, 720
None
None 200-7/16 197-3/16 87-9/16 710
RECB 360, 480, 600, 720 120, 180 200-7/16 197-3/16 87-9/16 710
RDCB 360, 480, 600, 720
500, 600, 700, 800
None
200-7/16 197-3/16 87-9/16 710
1000, 1200, 1400, 1600 232-7/8 229-5/8 120 740
RDB 418, 444, 538, 564, 602, 658, 684, 722, 804, 842
None
None 200-7/16 197-3/16 87-9/16 710
REDB 418, 444, 538, 564, 602, 658, 684, 722, 804, 842 120, 180 200-7/16 197-3/16 87-9/16 710
RDDB 418, 444, 538, 564, 602, 658, 684, 722, 804, 842
500, 600, 700, 800
None
200-7/16 197-3/16 87-9/16 710
1000, 1200, 1400, 1600 232-7/8 229-5/8 120 740
Dimensions - mm kg
RCB 360, 480, 600, 720
None
None 5091 5009 2224 322
RECB 360, 480, 600, 720 120, 180 5091 5009 2224 322
RDCB 360, 480, 600, 720
500, 600, 700, 800
None
5091 5009 2224 322
1000, 1200, 1400, 1600 5915 5833 3048 322
RDB 418, 444, 538, 564, 602, 658, 684, 722, 804, 842
None
None 5091 5009 2224 322
REDB 418, 444, 538, 564, 602, 658, 684, 722, 804, 842 120, 180 5091 5009 2224 322
RDDB 418, 444, 538, 564, 602, 658, 684, 722, 804, 842
500, 600, 700, 800
None
5091 5009 2224 322
1000, 1200, 1400, 1600 5915 5833 3048 336
IMPORTANT NOTES: Area enclosed by roof curb must comply with clearance to combustible materials. If the roof is constructed
of combustible materials, area within the roof curb must be ventilated, left open, or covered with non-combustible material which
has an "R" value of at least 5. If area within curb is left open, higher radiated sound levels may result.
Roof Curb Dimensions and Weight by Model and Size
FIGURE 5D - Dimensions - MAPS ® III Cabinet D, Option CJ3 Roof Curb (Curb height is 16" / 406mm.)
Return
Air Duct Opening
for inserting ductwork with flange down from the roof.
Discharge
Duct
Opening
for inserting
ductwork
with flange
down from
the roof
X - Outside of Curb Rail
Y - Inside of Curb Rail
Top width of mounting rails is 1-5/8” (41mm). Always apply caulking to all mounting surfaces (curb rails, supports,
and duct dividers) before placing unit.
Top View
of Roof Curb
Unit Airflow
5-1/2” (140mm) 1-5/8”
(41mm)
1-5/8”
(41mm)
1-5/8”
(41mm)
1-5/8”
(41mm)
*48”
(1219mm)
*10-1
1/16”
(271mm)
*30-1
1/16”
(779mm)
*Z
*Use these dimensions for assembling the roof curb; follow the instructions on pages 14-15.
DO NOT USE these dimensions for sizing ductwork; see FIGURE 5E on page 17.
2-39/64”
(66mm)
4-3/8” (111mm)
*26-7/16” (672mm)
*72-5/16”
(1837mm)
92-1/4”
(2343mm)
89”
(2261mm)
2-piece cross support (with splice bracket
outside of the duct opening)
2-piece cross support (with splice bracket
outside of the duct opening)
2-piece cross support (with splice bracket)
2-piece cross support (with splice bracket outside of the duct opening)