A.O. Smith HW 300 THRU HW 670 manual Wiring Diagram

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Item

Parts Description

 

 

HW 300

HW 399/420

HW 520

 

HW670

 

Wiring Diagram:

 

 

 

 

 

 

 

 

..........

Natural Gas

 

192359

192359

192359

192359

 

..........

Propane Gas

 

192360

192360

192360

192360

 

24

Elbow, Union With 1/8" Pressure Tap

1854

2482

86506

86506

 

25

Exchanger, Heat

 

190922

190913

190889

190889

 

26

Fitting, Limit Control

 

97570

97570

97570

97570

 

27

Grommet

 

96053

96053

96053

96053

 

28

Hood, Draft:

 

 

 

 

 

 

 

 

..........

Series 932

190479-700 ..

98428-707/98428-704 ....

98428-704

192256-700

..........

Series 933

190479-700 ..

98428-707/98428-704 ....

98428-704

98428-700

30

Insulation, Blanket

 

190175

190175-1

190175-2

190175-3

31

Insulation, Pyrofelt

 

190176

190177

190177

190177

 

32

Insulator

 

32779-1

32779-1

32779-1

32779-1

 

33

Jacket

 

211176

211177

211178

211178

 

34

Leg

 

96383-704

96383-701

96383-701

96383-701

 

 

 

 

35

Nut, Tie Rod

 

85138

85138

85138

85138

 

36

Nut, Wing

 

1995-1

1995-1

1995-1

1995-1

 

37

Orifice, Pilot Burner:

 

 

 

 

 

 

 

 

..........

Natural Gas

 

6210

6210

6210

6210

 

..........

Propane Gas

 

210913

210913

210913

210913

 

38

Plug, Pipe 1/8" Pressure Tap

3348

3348

3348

3348

 

39

Retainer, Door

 

190429

190429

190429

190429

 

40

Ring, Support

 

95359

85405

85405

85405

 

41

Rod, Tie (3 Required)

 

- - - -

94453-11

94453-3

94453-3

 

..........

Rod, Tie (2 Required)

 

94453-6

- - - -

- - - -

- - - -

 

..........

Rod, Tie (1 Required)

 

94453-2

- - - -

- - - -

- - - -

 

42

Screen, Peep Hole

 

1051

1051

1051

1051

 

43

Screw, Thumb

 

97288

97288

97288

97288

 

44

Shield, Base Radiation

..............................

96015-1

96015

96015

96015

 

45

Shield, Door

 

191119

191119

191119

191119

 

46

Shield, Floor

 

96025-1

96025

96025

96025

 

 

 

 

 

47

Shield, Leg

 

97265

97265

97265

97265

 

48

Shield, Pilot

 

170247

170247

170247

170247

 

49

Skirt Assembly

 

97260

97261

97262

97262

 

50

Stud, Floor Shield

 

96384

96384

96384

96384

 

51

Switch, Safety Flow

 

 

 

 

 

 

 

 

..........

(Required but not supplied with unit)

.. 211480

211480

211480

211480

 

52

Tape, Asbestos Free (Used with Item 40)

... 95072

95072-1

95072-1

95072-1

53

Terminal, Segment (4 Required)

98205

98205

98205

98205

 

54

Thermal Balancer

 

98190

98190

98190

98190

 

55

Transformer

 

99238

99238

99238

99238

 

56

Tube, Asbestos Free

 

68831

68831

68831

68831

 

57

Tube, By-Pass

 

96162-1

94451-3

97463

97463

 

58

Tubing, 1/4" x 60" Wire Assorted Fittings

 

 

 

 

 

 

 

..........

(User to cut to required length)

1417-60

1417-60

1417-60

1417-60

59

Valve, Gas Control:

HW

 

 

 

 

..........

Natural Gas (Series 932)

. 78450

78450-4/78450

78450

78450

 

..........

.................Propane Gas (Series 933)

................... ..............78450-1

78450-1

 

60

Valve, Relief 50 PSI

 

210451

210451-1

210451-1

210451-1

61

Wire, 200°C Tan with Terminals

6226

6226

6226

6226

 

62

*Wire, (See illustration for terminals —

 

 

 

 

 

 

 

..........

Order as required):

 

 

 

 

 

 

 

 

..........

16 AWG Stranded, 1050C, AWM & TEW

 

 

 

 

 

..........

Black

 

86578

86578

86578

86578

 

..........

Red

 

86579

86579

86579

86579

 

..........

White

 

86580

86580

86580

86580

 

..........

18 AWG Stranded, 200°C

 

 

 

 

 

 

 

..........

Tan

 

78223

78223

78223

78223

 

63

Wire, Ground, 250°C

 

170889-69

170889-69

170889-69

170889-69

64

Standard hardware items to be purchased locally.

 

 

 

 

 

65

Glass Yarn (4 Req’d.)

 

68831-2

68831-3

68831-3

68831-3

66

Glass Yarn (4 Req’d.)

 

68831-5

68831-4

68831-6

68831-6

 

 

 

 

*Items not illustrated.

When ordering wire, indicate length required in inches. (Example: 86578-100 equals 100" length).

Part numbers underlined are recommended stock items for emergency replacement. (Consider gas used in your area only). Request parts from PSD by giving all information such as model and series number, type of gas and specifications.

Parts List PSD-3-140/C supersedes Parts List PSD-3-140/A&B.

Image 3
Contents Replacement Parts List Parts Description HW 399/420 HW670 Wiring Diagram TH Street ALSIP, Illinois 60803 Phone 1-800-433-2545 FAX

HW 300 THRU HW 670 specifications

A.O. Smith is renowned for its commitment to producing high-quality water heating solutions, and the HW series, particularly the HW 300 through HW 670, exemplifies this dedication. These heavy-duty, commercial water heaters are designed to meet a broad spectrum of hot water demands efficiently and reliably.

One of the main features of the A.O. Smith HW series is its impressive capacity. The range includes models from 300 to 670 gallons, making it suitable for various applications, from small businesses to large industrial facilities. These water heaters can deliver a consistent supply of hot water, ensuring that operations can proceed smoothly without interruption.

The HW series employs cutting-edge technology to enhance performance and energy efficiency. Many models in this range utilize advanced insulation, which minimizes heat loss and maintains optimal water temperatures. The thick foam insulation not only improves efficiency but also helps to reduce energy costs over time.

Another key characteristic of the A.O. Smith HW series is the robust construction of the units. Built to withstand demanding environments, these water heaters feature high-quality steel tanks with protective coatings to combat corrosion. Furthermore, the HW series often includes option upgrades such as an advanced flame control system that ensures precise temperature regulation, contributing to both safety and performance.

The incorporation of user-friendly controls is also a significant advantage of the HW series. Many models feature LCD displays that facilitate easy monitoring and adjustment of temperature settings. The intuitive controls reduce the complexity of operation, allowing users to focus on their core activities rather than water heater management.

Moreover, the HW series prioritizes safety, incorporating multiple safety features such as a comprehensive venting system and automatic shut-off valves. These elements safeguard against potential hazards, ensuring both operational safety and peace of mind for users.

In summary, A.O. Smith's HW series, including the HW 300 through HW 670 models, showcases an exceptional blend of capacity, efficiency, durability, and advanced technology. Ideal for commercial and industrial applications, these water heaters provide reliable performance, ensuring businesses have the hot water they need when they need it, while also optimizing energy use and enhancing safety. This makes the HW series a top choice for those seeking dependable water heating solutions.