COIL HIGH LIMIT

ASSEMBLY

ROBERTSHAW

GAS VALVE

WIRE TERMINALS USED WITH ITEM 62

77951

85688

99593

78469

78468

 

 

 

 

 

PILOT BURNER

ASSEMBLY

Item

Parts Description

 

HW 300

HW 399/420

HW 520

HW670

1

Base, Assembly

76195-700

.......... 76193-700

76193-700

76193-700

2

Box, Junction

190616-4

............ 190616-4

190616-4

190616-4

3

Bracket, Gas Control String

93764

93764

93764

93764

4

Bracket, Pilot (At Main Gas Burner)

190424

190424

190424

190424

5

Bracket, Shield

190473

190473

190473

190473

6

Burner, Main: Sea Level

 

 

 

 

 

..........

Natural Gas

98593-20

............. 98593-2

98593-21

98593-4

..........

Propane Gas

98593-1

98593-3

98593-22

98593-5

7

Burner, Pilot (With Orifice):

 

 

 

 

..........

Natural Gas

210871-0

............ 210871-0

210871-0

210871-0

..........

Propane Gas

210871-1

............ 210871-1

210871-1

210871-1

9

Bushing, Snap

98863

98863

98863

98863

10

Cap, Terminal End

98206

98206

98206

98206

* 11

Clamp, Capillary Tube

94998

94998

94998

94998

12

Clamp, Tubing

68903

68903

68903

68903

13

Clip, Retainer

92979

92979

92979

92979

14

Coil, Combustion Chamber

97485

97486

99267

99267

15

Collector, Flue

190285-10

.... 190285-1/190285

190285-5

190286

16

Control, Intermittent Ignition:HW

 

 

..........

Natural Gas (Series 932)

191182

191182

191182

191182

..........

Propane Gas (Series 933)

191182-1

191182-1

191182-1

191182-1

17

Control, Limit

93661-4

93661-4

93661-4

93661-4

18

Control, Limit (Protector Switch)

77981-2

77981-2

77981-2

77981-2

19

Cover, Leg

97259-701

.......... 97259-701

97259-701

97259-701

20

M.E.A.

 

HW

96667-706

96667-706

Cover, Limit Control (Protector Switch)

96667-706

.......... 96667-706

21

Cover, Peep Hole

1050-702

............ 1050-702

1050-702

1050-702

22

Cover, Top

96096-709

.......... 96096-701

96378-702

96378-701

23

*Decals:

 

 

 

 

 

 

..........

ASHRAE

191857

191857

191857

191857

..........

California

42985

42985

42985

42985

..........

Clearance — Models HW-300, 399

190022-1

............ 190022-2

- - - -

- - - -

..........

Clearance — Models HW-420, 520 & 670

- - - -

76982

76982

76982

..........

Flammable Vapors/Scald

192872

192872

192872

192872

..........

Lighting & Operating

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

191367

191367

191367

191367

..........

 

............................................................. 42929-22

............ 42929-22

42929-23

42929-22

..........

Pilot

77860

77860

77860

77860

 

..........

Protector

97315

97315

97315

97315

..........

Warning

190230

190230

190230

190230

..........

Water Inlet

94518

94518

94518

94518

..........

Water Outlet

94519

94519

94519

94519

 

 

 

 

 

 

 

 

Page 2
Image 2
A.O. Smith HW 300 THRU HW 670 manual Parts Description HW 399/420 HW670

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.