A.O. Smith BTH 300A Manuale Utente
2
These designs comply with the current edition of the American
National Standard for Gas Water Heaters, Volume III,
ANSI Z21.10.3 / CSA 4.3 as an automatic circulating tank water
heater, and automatic storage water heaters.
National Standard for Gas Water Heaters, Volume III,
ANSI Z21.10.3 / CSA 4.3 as an automatic circulating tank water
heater, and automatic storage water heaters.
Detailed installation diagrams are found in this manual. These
diagrams will serve to provide the installer with a reference for the
materials and methods of piping necessary. It is highly essential
that all water, gas piping and wiring be installed as shown on the
diagrams.
diagrams will serve to provide the installer with a reference for the
materials and methods of piping necessary. It is highly essential
that all water, gas piping and wiring be installed as shown on the
diagrams.
Particular attention should be given to the installation of
thermometers at the locations indicated on the diagrams as these
are necessary for checking the proper functioning of the heater.
thermometers at the locations indicated on the diagrams as these
are necessary for checking the proper functioning of the heater.
In addition to these instructions, the equipment shall be installed in
accordance with those installation regulations in force in the local
area where the installation is to be made. These shall be carefully
followed in all cases. Authorities having jurisdiction should be
consulted before installations are made.
accordance with those installation regulations in force in the local
area where the installation is to be made. These shall be carefully
followed in all cases. Authorities having jurisdiction should be
consulted before installations are made.
In the absence of local codes, the installation must comply
with the current editions of the National Fuel Gas Code,
ANSI Z223.1/NFPA 54 and the National Electrical Code,
NFPA 70 or CAN/CSA-B149.1, the Natural Gas and Propane
Installation Code and CSA C22.1, the Canadian Electrical Code. All
documents are available from the Canadian Standards Association,
8501 East Pleasant Valley Road, Cleveland, OH 44131. NFPA
documents are also available from the National Fire Protection
Association, 1 Batterymarch Park, Quincy, MA 02269.
with the current editions of the National Fuel Gas Code,
ANSI Z223.1/NFPA 54 and the National Electrical Code,
NFPA 70 or CAN/CSA-B149.1, the Natural Gas and Propane
Installation Code and CSA C22.1, the Canadian Electrical Code. All
documents are available from the Canadian Standards Association,
8501 East Pleasant Valley Road, Cleveland, OH 44131. NFPA
documents are also available from the National Fire Protection
Association, 1 Batterymarch Park, Quincy, MA 02269.
FOREWORD
ROUGH-IN-DIMENSIONS
GAS VALVE PIPING
BTH-300
1 1/4" NPT
BTH-400
1 1/4" NPT
Recovery capacities are based on heater performance at 96% thermal efficiency.
U.S. Gallons/Hr and Litres/Hr at TEMPERATURE RISE INDICATED
TYPE OF
INPUT
Approx.
F°
20F°
30F°
40F°
50F°
60F°
70F°
80F°
90F°
100F° 110°
120F°
130F°
140F°
MODEL
GAS
BTUH
KW
Capacity
C°
11C°
17C°
22C°
28C°
33C°
39C°
44C°
50C°
56C°
61C°
67C°
72C°
78C°
300,000
130 US Gals.
GPH
1746
1164
873
699
582
499
436
388
349
318
291
269
250
88
492 Litres
LPH
6610
4406
3304
2644
2203
1888
1652
1469
1322
1201
1102
1017
945
300,000
130 US Gals.
GPH
1746
1164
873
699
582
499
436
388
349
318
291
269
250
88
492 Litres
LPH
6610
4406
3304
2644
2203
1888
1652
1469
1322
1201
1102
1017
945
399,900
130 US Gals.
GPH
2328
1552
1164
931
776
665
582
517
466
423
388
359
332
117
492 Litres
LPH
8813
5875
4406
3525
2938
2518
2203
1958
1763
1602
1469
1356
1259
399,900
130 US Gals.
GPH
2328
1552
1164
931
776
665
582
517
466
423
388
359
332
117
492 Litres
LPH
8813
5875
4406
3525
2938
2518
2203
1958
1763
1602
1469
1356
1259
TABLE 1 RECOVERY CAPACITIES.
NATURAL
NATURAL
PROPANE
BTH-300
BTH-300
BTH-400
BTH-400
PROPANE