Rough-in dimensions/ capacities, Installation clearances, Levelling – A.O. Smith DB/DW-720-1810 User Manual
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WARNING
AN AMPLE SUPPLY OF AIR MUST BE PROVIDED
FOR PROPER COMBUSTION AND VENTILATION.
Minimum Clearances To Combustibles
Water
Blank
Top
Side
Side
Rear
Vent
Front
All Models
12" (305mm)
18" (457mm)
6" (155mm)
6" (155mm)
6" (155mm)
Alcove
CAUTION
Label all wires prior to disconnection when servicing controls. Wiring
errors can cause improper and dangerous operation.
"Verify proper operation after servicing."
ROUGH-IN DIMENSIONS/
CAPACITIES
INSTALLATION CLEARANCES
These boilers are approved for installation on combustible flooring
in an alcove with minimum clearance to combustibles See chart
below.
Two inch clearance is allowable from combustible construction for
hot water pipes.
Sufficient clearance should be provided at one end of the boiler to
permit access to heat exchanger tubes for cleaning. Maximum
operating water supply pressure 160 psi. Gas supply pressure:
13.8" w.c. max., 5.5" w.c. min.
Sufficient area should be provided at the front and sides of the unit
for proper servicing. Clearances of 48" in front and 24" on sides is
recommended. In a utility room installation, the door shall be wide
enough to allow the boiler to enter or to permit the replacement of
another appliance.
LEVELLING
Each unit should be checked after installation to be certain that it is
level.
TABLE 1, ROUGH-IN DIMENSIONS
Models
Dimensions
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
A
46 1/2
1181
52 1/5
1326
57 3/4
1467
52 7/8
1343
58 1/2
1486
64 1/2
1638
69 1/2
1765
75
1905
82 1/2
2096
B
29 5/8
752
29 5/8
752
29 5/8
752
32 3/4
832
32 3/4
832
32 3/4
832
34
864
34
864
34
864
C
54 3/4
1391
54 3/4
1391
54 3/4
1391
58
1473
58
1473
58
1473
60 1/2
1537
60 1/2
1537
60 1/2
1537
D
1 1/4 NPT
1 1/4 NPT
1 1/4 NPT
1 1/4 NPT
1 1/2 NPT
1 1/2 NPT
1 1/2 NPT
2
NPT
2
NPT
E
7 3/4
197
7 3/4
197
7 3/4
197
7 1/2
191
7 1/2
191
7 1/2
191
7 1/2
191
7 1/2
191
7 1/2
191
F
15 1/2
394
15 1/2
394
15 1/2
394
18 1/2
470
18 1/2
470
18 1/2
470
18 1/2
470
18 1/2
470
18 1/2
470
G
17 1/4
438
17 1/4
438
17 1/4
438
18 9/16
471
18 9/16
471
18 9/16
471
19 1/8
486
19 1/8
486
19 1/8
486
H
4 1/4
108
4 1/4
108
4 1/4
108
4
102
4
102
4
102
4 1/2
114
4 1/2
114
4 1/2
114
J
2 NPT
2 NPT
2 NPT
2 1/2 NPT
2 1/2 NPT
2 1/2 NPT
2 1/2 NPT
2 1/2 NPT
2 1/2 NPT
K
2 NPT
2 NPT
2 NPT
2 1/2 NPT
2 1/2 NPT
2 1/2 NPT
2 1/2 NPT
2 1/2 NPT
2 1/2 NPT
L
1 NPT
1 NPT
1 NPT
1 1/4 NPT
1 1/4 NPT
1 1/4 NPT
1 1/4 NPT
1 1/4 NPT
1 1/4 NPT
M
12
305
14
356
14
356
16
406
16
406
18
457
18
457
18
457
20
508
N
15 1/2
394
16 1/2
419
16 1/2
419
17 1/4
438
17 1/4
438
17 1/4
438
13 3/4
349
13 3/4
349
13 3/4
349
W
32 1/8
816
31 1/8
791
32 1/8
816
30 15/16
786
30 15/16
786
30 15/16
786
31
787
31
787
31
787
Approx.
Shipping
Weight.
780 lbs 354 Kg. 950 lbs
431 Kg
950 lbs
431 Kg 1000 lbs 454 Kg 1075 lbs 488 Kg. 1100 lbs 499 Kg 1125 lbs 510 Kg 1150 lbs 522 Kg 1250 lbs 567 Kg
DW-1810
DW-1210
DW-1350
DW-1480
DW-1610
DW-720
DW-840
DW-960
DW-1080