ROUGH-IN-DIMENSIONS

 

 

GAS VALVE PIPING

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BTH-300

1 1/4" NPT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BTH-400

1 1/4" NPT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BTH-500

1 1/2" NPT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TABLE 1 RECOVERY CAPACITIES.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

U.S. Gallons/Hr and Litres/Hr at TEMPERATURE RISE INDICATED

 

 

 

 

 

TYPE OF

 

INPUT

 

 

Approx.

20F°

30F°

40F°

50F°

60F°

70F°

80F°

90F°

100F°

110°

120F°

 

130F°

140F°

MODEL

 

GAS

 

BTUH

KW

 

 

Capacity

11C°

17C°

22C°

28C°

33C°

39C°

44C°

50C°

56C°

61C°

67C°

 

72C°

78C°

BTH-300

 

NATURAL

 

 

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

 

 

 

 

 

 

 

 

 

 

BTH-300

 

PROPANE

 

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

 

 

 

 

 

 

 

 

 

 

BTH-400

 

NATURAL

 

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

 

 

 

 

 

 

 

 

 

 

BTH-400

 

PROPANE

 

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

 

 

 

 

 

 

 

 

 

 

BTH-500

 

NATURAL

 

499,900

 

 

130 US Gals.

GPH

2878

1919

1439

1151

959

822

720

640

576

523

480

 

443

411

 

 

 

146

 

 

492 Litres

LPH

10894

7263

5447

4358

3631

3113

2724

2421

2179

1981

1816

 

1676

1556

 

 

 

 

 

 

 

 

 

 

BTH-500

 

PROPANE

 

499,900

 

 

130 US Gals.

GPH

2878

1919

1439

1151

959

822

720

640

576

523

480

 

443

411

 

 

 

146

 

 

492 Litres

LPH

10894

7263

5447

4358

3631

3113

2724

2421

2179

1981

1816

 

1676

1556

 

 

 

 

 

 

 

 

 

 

Recovery capacities are based on heater performance at 96% thermal efficiency for BTH 300A, 400A, and 95% thermal efficiency for BTH 500A.

FOREWORD

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.

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.

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.



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.

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.

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A.O. Smith 500A, 300A warranty Rough-In-Dimensions, Foreword