A.O. Smith HW 300 THRU HW 610 - Manual (Page 2)

NOTE:
TOP MANIFOLD HAS EXTRA OPENINGS FOR THERMOMETER 3/4“ (19MM) AND RELIEF VALVE 1“ (25MM) [HW-520 AND -610 ONLY]
HW - 300 ONLY
HW-610
NATURAL GAS
ONLY
ALL DIMENSIONS IN INCHES (MM)
Models A В C D E F G H J К L M N P Q R S T
Approx.
Ship. Wt.
Lbs. (Kgs.)
HW-300 65
(1651)
43-1/4
(1099)
36
(914)
25-1/4
(641)
12
(305)
8
(203)
16-1/2
(419)
29-5/8
(753)
9
(229)
14
(356)
1-1/4
(32)
1-1/4
(32)
3/4
(19)
26-5/8
(676)
1
(25)
10-1/8
(257)
5-3/8
(137)
5
(127)
240
(109)
HW-399 57-1/8
(1451)
45-1/8
(1146)
38-3/4
(984)
27
(686)
12
(305)
10
(254)
16-3/4
(425)
31-1/2
(800)
9
(229)
14
(356)
1-1/2
(38)
1-1/2
(38)
1
(25)
27-1/2
(699)
1
(25)
11-1/4
(286)
5-1/2
(140)
5
(127)
291
(132)
HW-420 57-1/8
(1451)
45-1/8
(1146)
38-3/4
(984)
27
(686)
12
(305)
10
(254)
16-3/4
(425)
31-1/2
(800)
9
(229)
14
(356)
1-1/2
(38)
1-1/2
(38)
1
(25)
27-1/2
(699)
1
(25)
11-1/4
(286)
5-1/2
(140)
5
(127)
291
(132)
HW-520 68-5/16
(1735)
56-1/4
(1429)
46
(1168)
27
(686)
12
(305)
10
(254)
18
(457)
36-1/2
(927)
9
(229)
11
(279)
2
(51)
2
(51)
1
(25)
24-1/2
(622)
3-1/2
(89)
12
(305)
5-3/4
(146)
7
(178)
361
(164)
Propane
HW-610
67
(1702)
56-1/4
(1429)
46
(1168)
27
(686)
12
(305)
12
(305)
18
(457)
36-1/2
(927)
9
(229)
11
(279)
2
(51)
2
(51)
1
(25)
24-1/2
(622)
3-1/2
(89)
12
(305)
5-3/4
(146)
7
(178)
361
(164)
Natural
HW-610
64-3/4
(1645)
56-1/4
(1429)
46
(1168)
27
(686)
12
(305)
12
(305)
18
(457)
36-1/2
(927)
9
(229)
11
(279)
2
(51)
2
J51]_
1
(25)
24-1/2
(622)
3-1/2
(89)
12
(305)
5-3/4
(146)
7
(178)
361
(164)
SPECIFICATIONS AND RECOVERY CAPACITIES
TEMPERATURE RISE
INPUT Temp. (C) 11 17 22 26 33 39 44 50 56 61 67 72 78
Model BTUH (KW) Rise (F) 20 30 40 50 60 70 80 90 100 110 120 130 140
HW-300 300,000 LPH 5,505 3,670 2,753 2,202 1,835 1,573 1,376 1,223 1,001 1,001 918 847 786
(88) GPH 1,455 970 727 582 485 416 354 323 291 264 242 224 208
HW-399 399,000 LPH 7,322 4,882 3,661 2,929 2,441 2,092 1,831 1,627 1,464 1,331 1,220 1,127 1,046
(116) GPH 1,935 1,290 967 774 645 553 484 430 387 352 322 298 276
HW-420 420,000 LPH 7,708 5,138 3,854 3,083 2,569 2,202 1,927 1,713 1,542 1,401 1,285 1,186 1,101
(123) GPH 2,036 1,358 1,018 815 679 582 509 453 407 370 339 313 291
HW-520 520,000 LPH 9,543 6,362 4,771 3,817 3,181 2,727 2,386 2,121 1,909 1,735 1,590 1,468 1,363
(152) GPH 2,521 1,681 1,261 1,008 840 720 630 560 504 458 420 388 360
HW-610 610,000 LPH 11,194 7,463 5,597 4,478 3,731 3,198 2,799 2,488 2,239 2,035 1,866 1,722 1,599
(179) GPH 2,958 1,972 1,479 1,183 986 845 739 657 592 538 493 455 423
Recovery capacity ratings are heater performance at an assigned 76% thermal efficiency. Actual recoveries are higher.
NOTE: To compensate for the effects of high altitude areas above 2.000 feet (610m), input and output rating should be
reduced approximately 4% for each 1,000 feet (305m) above sea level.
SUGGESTED SPECIFICATIONS
Boiler{s) for hot water supply purposes shall be Model(s) No.. . as manufactured by A. O. Smith or an approved equal. Boiler(s)
shall be gas-fired, and design certified by the Canadian Gas Association or an approveri/accredited independent rating laboratory, capable of
supplying______ GPH (LPH) at 100°F (56°C) temperature rise equipped to burn________________ gas, with input rating of________ BTUH(KW)/hr. and
bearing the ASME code symbol. Boiler(s) shall be up flow type having all non-ferrous waterways, and employing a copper finned heat exchanger
and a tightly wound copper coil combustion chamber with 160 psi (1100 kPa) working pressure rating, Boiler(s) shall be equipped with an electric
gas valve of the step-opening type, an adjustable limit control which will break the electric circuit on temperature rise, intermittent ignition with one
(1) second shutdown in the event of pilot flame failure (propane models equipped with standing pilots), a gas pressure regulator properly set for the
gas to be supplied, and a coil limit switch for shut off in event of excessive water temperature, a thermal balancer, a certified draft diverter and a fully
illustrated instruction manual. Certified for combustible flooring. Outer jacket shall be of baked enamel finish. The coil, heat exchanger and burner
shall have a five year limited warranty as outlined in the written warranty.
A. 0. Smith Enterprises Ltd.
Water Products Company
A Subsidiary of A. O. Smith Corporation
Stratford, Ontario El Paso, Texas
McBee, South Carolina
Seattle, Washington
Veidhoven, The Netherlands
A. O. Smith Corporation reserves the right to make product changes
or improvements at any time without notice.
A012.0C > A. O. Smith Corp., 1996 Printed in U.S.A.