Figure 5 - roof curb and duct opening dimensions, Dimensions - downflow roof curb option cj31 – Reznor MAPS II Unit Installation Manual User Manual
Page 13
Form I-MAPS II, P/N 206131 (Rev 13), Page 13
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FIGURE 5 - Roof Curb and
Duct Opening Dimensions
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.
If area inside curb is open, roof opening
dimensions must be no greater than:
Cabinet A - 34-13/16" x 69" (884 x 1753mm);
Cabinet B - 49-13/16" x 69" (1265 x 1753mm);
Cabinet C - 61-5/16" x 97-7/8" (1557 x 2486mm).
NOTE: See Appendix, page 58, for cross-reference
by Model Size and Cabinet Size.
Dimensions - Downflow Roof Curb Option CJ31
Cabinet
Size
RCA Model Size
RDA Model Size
Illustration Codes - FIGURE 5
A
B
C
D
E
F
G
H
J
K
L
M
Curb Dimensions for Cooling Only Model RCA, RDA by Cabinet Size, Model Size - inches (±1/8)
A
025, 037, 059, 060, 077, 078, 090, 108, 109, 120
102, 114, 126, 144
6-1/8
26-1/2
24
12
24
12
38-5/8
13-1/4
17-1/2
12-7/8
72-3/4
12-1/4
164
--
N/A
N/A
24
12
24
12
38-5/8
13-1/4
17-1/2
12-7/8
72-3/4
12-1/4
B
078, 090, 108, 120, 139, 166, 184, 198
102, 114, 126, 144, 188, 220, 234
N/A
N/A
36
12
36
12
53-5/8
13-1/4
17-1/2
12-7/8
72-3/4
12-1/4
C
176, 226
230, 280
19-3/8
32-3/8
30
18
46
15
65-1/8
20-1/4
24-3/4
17-7/8
101-5/8
13-1/4
292, 374
346, 428, 446
10-3/4
49-1/2
47
18
46
15
65-1/8
20-1/4
24-3/4
17-7/8
101-5/8
13-1/4
Curb Dimensions for Cooling Only Model RCA, RDA by Cabinet Size, Model Size - mm (±3)
A
025, 037, 059, 060, 077, 078, 090, 108, 109, 120
102, 114, 126, 144
156
673
610
305
610
305
981
337
445
327
1848
311
164
--
N/A
N/A
610
305
610
305
981
337
445
327
1848
311
B
078, 090, 108, 120, 139, 166, 184, 198
102, 114, 126, 144, 188, 220, 234
N/A
N/A
914
305
914
305
1362
337
445
327
1848
311
C
176, 226
230, 280
492
822
762
457
1168
381
1654
514
629
454
2581
337
292, 374
346, 428, 446
273
1257
1194
457
1168
381
1654
514
629
454
2581
337
When cutting only duct openings, cut opening 1" (25mm) larger than duct size to allow clearance for installation.
Cabinet
Size *
RDCA Model Size*
RDDA, Model Size*
Gas Heat
Size *
Illustration Codes - FIGURE 5
A
B
C
D
E
F
G
H
J
K
L
M
Curb Dimensions for Cooling/Gas Heat Makeup Air Model RDCA, RDDA by Cabinet Size, Model Size - inches (±1/8)
A
025, 037, 059, 060,
077, 078, 090, 108,
109, 120, 164
102, 114, 126, 144
100
9-7/8
19
18
12
24
12
38-5/8
13-1/4
17-1/2
12-7/8
72-3/4
12-1/4
150
6-1/8
26-1/2
24
12
24
12
38-5/8
13-1/4
17-1/2
12-7/8
72-3/4
12-1/4
200
N/A
N/A
24
12
24
12
38-5/8
13-1/4
17-1/2
12-7/8
72-3/4
12-1/4
B
078, 090, 108, 120,
139, 166, 184, 198
102, 114, 126, 144,
188, 220, 234
250
6-1/8
41-1/2
36
12
36
12
53-5/8
13-1/4
17-1/2
12-7/8
72-3/4
12-1/4
300
N/A
N/A
36
12
36
12
53-5/8
13-1/4
17-1/2
12-7/8
72-3/4
12-1/4
C
176, 226, 292, 374
230, 280, 346, 428,
446
350, 400
19-3/8
32-3/8
30
18
46
15
65-1/8
20-1/4
24-3/4
17-7/8
101-5/8
13-1/4
450, 500
13-1/4
44-1/2
42
18
46
15
65-1/8
20-1/4
24-3/4
17-7/8
101-5/8
13-1/4
550, 600
10-3/4
49-1/2
47
18
46
15
65-1/8
20-1/4
24-3/4
17-7/8
101-5/8
13-1/4
650, 700
8-1/4
55
52
18
46
15
65-1/8
20-1/4
24-3/4
17-7/8
101-5/8
13-1/4
Curb Dimensions for Cooling/Gas Heat Makeup Air Model RDCA, RDDA by Cabinet Size, Model Size - mm (±3)
A
025, 037, 059, 060,
077, 078, 090, 108,
109, 120, 164
102, 114, 126, 144
100
251
483
457
305
610
305
981
337
445
327
1848
311
150
156
673
610
305
610
305
981
337
445
327
1848
311
200
N/A
N/A
610
305
610
305
981
337
445
327
1848
311
B
078, 090, 108, 120,
139, 166, 184, 198
102, 114, 126, 144,
188, 220, 234
250
156
1054
914
305
914
305
1362
337
445
327
1848
311
300
N/A
N/A
914
305
914
305
1362
337
445
327
1848
311
C
176, 226, 292, 374
230, 280, 346, 428,
446
350, 400
492
822
762
457
1168
381
1654
514
629
454
2581
337
450, 500
337
1130
1067
457
1168
381
1654
514
629
454
2581
337
550, 600
273
1257
1194
457
1168
381
1654
514
629
454
2581
337
650, 700
210
1397
1321
457
1168
381
1654
514
629
454
2581
337
Cabinet
Size*
RECA Model Size
*
REDA Model Size
*
* Electric
Heat Size
Illustration Codes - FIGURE 5
A
B
C
D
E
F
G
H
J
K
L
M
Curb Dimensions for Cooling/Electric Heat Makeup Air Model RECA, REDA by Cabinet Size, Model Size - inches (±1/8)
A
025, 037, 059, 060, 077, 078, 090, 108, 109, 120, 164 102, 114, 126, 144
All
N/A
N/A
24
12
24
12
38-5/8
13-1/4
17-1/2
12-7/8
72-3/4
12-1/4
B
078, 090, 108, 120, 139, 166, 184, 198
102, 114, 126, 144, 188, 220, 234 All
N/A
N/A
36
12
36
12
53-5/8
13-1/4
17-1/2
12-7/8
72-3/4
12-1/4
C
176, 226, 292, 374
230, 280, 346, 428, 446
All
10-3/4
49-1/2
47
18
46
15
65-1/8
20-1/4
24-3/4
17-7/8
101-5/8
13-1/4
Curb Dimensions for Cooling/Electric Heat Makeup Air Model RECA, REDA by Cabinet Size, Model Size - mm (±3)
A
025, 037, 059, 060, 077, 078, 090, 108, 109, 120, 164
102, 114, 126, 144
All
N/A
N/A
610
305
610
305
981
337
445
327
1848
311
B
078, 090, 108, 120, 139, 166, 184, 198
102, 114, 126, 144, 188, 220, 234 All
N/A
N/A
914
305
914
305
1362
337
445
327
1848
311
C
176, 226, 292, 374
230, 280, 346, 428, 446
All
273
1257
1194
457
1168
381
1654
514
629
454
2581
337
* See Appendix, page 58, for cross-reference by Model Size/Heat Size and Cabinet Size