Foreword – A.O. Smith 404 User Manual
Page 4
4
TABLE 5: PUMPING PERFORMANCE GUIDE
TABLE 4: RECOVERY CAPACITIES
TEMPERATURE RISE - DEGREES °F (°C)
Input Rating
Water
40°F
50°F
60°F
70°F
80°F
90°F 100°F 110°F 120°F
130°F
MODEL
BTU/Hr. (kW)
Flow
(22.2°) (27.7°) (33.3°) (38.8°) (44.4°) (50°) (55.5°) (61.1°) (66.7°) (72.2°)
GW - 1000
990,000 (290.1)
GPH
2520
2016
1680
1440
1260
1120
1008
916
840
775
LPH
9526
7620
6350
5443
4763
4234 3810
3462
3175
2930
GW - 1300
1,300,000 (380.9)
GPH
3309
2647
2206
1891
1655
1471 1324
1203
1103
1018
LPH
12508 10006
8339
7148
6256
5560 5005
4547
4169
3848
GW - 1500
1,500,000 (439.5)
GPH
3818
3055
2545
2182
1909
1697 1527
1388
1273
1175
LPH
14432 11548
9620
8248
7216
6415 5772
5247
4812
4442
GW - 1850
1,850,000 (542.0)
GPH
4709
3767
3139
2691
2355
2093 1884
1712
1570
1449
LPH
17800 14239 11865 10172
8902
7912 7122
6471
5935
5477
GW - 2100
2,100,000 (615.3)
GPH
5345
4276
3564
3055
2673
2376 2138
1944
1782
1645
LPH
20204 16163 13472 11548 10104 8981 8082
7348
6736
6218
GW - 2500
2,490,000 (729.6)
GPH
6338
5071
4225
3622
3169
2817 2535
2305
2113
1950
LPH
23958 19168 15971 13691 11979 10648 9582
8713
7987
7371
FOREWORD
Detailed installation diagrams are in this manual. These diagrams
will provide the installer with a reference of materials needed and a
suggested method of piping. IT IS NECESSARY THAT ALL WATER
AND GAS PIPING, AND THE ELECTRICAL WIRING BE INSTALLED
AND CONNECTED AS SHOWN IN THE DIAGRAMS.
CHECK DIAGRAMS THOROUGHLY BEFORE STARTING
INSTALLATION TO AVOID POSSIBLE ERRORS AND MINIMIZE
TIME AND MATERIALS COST. SEE FIGURES 1 THROUGH 5 AND
TABLES 1, 2, AND 3.
This design complies with the current edition of ANSI Z21.13-CSA
4.9 for Gas-Fired Low-Pressure Steam and Hot Water Boilers.
MAKE SURE THE GAS ON WHICH THE BOILER WILL OPERATE
IS THE SAME AS THAT SPECIFIED ON THE BOILER RATING
PLATE.
The boiler installation must conform to these instructions and the
local code authority having jurisdiction. In the absence of local
codes, the installation must comply with the latest editions of
the National Fuel Gas Code, ANSI Z223.1/NFPA 54 and the
National Electrical Code, NFPA 70 or CAN/CSA B149.1, and CSA
2 C22.1. The former is available from the Canadian Standards
Association, 8501 East Pleasant Valley Road, Cleveland, OH
44131, and both documents are available from the National Fire
Protection Association, 1 Batterymarch Park, Quincy, MA 02269.
GB MODELS-FLOW, HEAD LOSS AND TEMPERATURE RISE
20 Deg. F Rise
30 Deg. F Rise
40 Deg. F Rise
Maximum Flow Rate
Minimum Flow Rate
GPM
PD-FT
GPM
PD-FT
GPM
PD-FT
GPM
PD-FT
Deg. F
GPM
PD-FT
Deg. F
MODEL
Head
Head
Head
Head
Rise
Head
Rise
GB - 1000
83
5.1
55
2.7
41.6
1.5
154
12.2
11
42
1.5
40
GB - 1300
109
7.2
72.8
4.2
54.6
3.2
154
14.5
14
55
3.2
40
GB - 1500
126
10.1
84
6.3
63
4.3
154
16.3
17
64
4.3
40
GB - 1850
154
18.5
103.6
10.1
77.7
6.4
154
18.5
20
78
6.4
40
GB - 2100
n/a
n/a
117.6
14.5
88
8.3
154
21.3
23
89
8.3
40
GB - 2500
n/a
n/a
139.4
18.5
104.6
11.6
154
23.2
28
105
11.6
40
Note: GW models (GB optional) are equipped with pumps capable of handling 50 equivalent feet
(15.2 m) of normal pipe fittings.