A. O. Smith LB-1000 Parts List

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ULLETINULLETIN

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ULLETIN

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PSD - Alsip, Illinois

Date: December 20, 1999 No. 137 Rev. 2
Subject: Gas Water Heater Conversion Policy
To: All Accounts
* This supersede all previous letters and field bulletins concerning residential and commercial water heater conversion.

ULLETINULLETIN

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TERTER

GAS WATER HEATER CONVERSION POLICY

All A.O. Smith Water Products Company’s residential and commercial gas water heaters are designed certified by CSA or UL,
under ANSI Standards for operation on one type of gas only, as indicated on the water heater’s model number and rating
plate.

A.O. Smith realizes that there may be certain situations where a field conversion may be necessary and in order to facilitate
such a conversion, A. O. Smith complies with CSA or UL regulations ensuring that a field conversion be appropriately and
safely completed.

An improper field conversion from one type of gas to another could cause potentially dangerous conditions that may cause an
explosion or fire resulting in property damage, bodily injury or both.

A.O. SMITH WILL ONLY ALLOW THE CONVERSION OF GAS WATER HEATERS FROM LP GAS (PROPANE) TO
NATURAL GAS. THE CONVERSION OF A GAS WATER HEATER FROM NATURAL GAS TO LP GAS (PROPANE) IS
NOT ALLOWED UNDER ANY CIRCUMSTANCES.

A.O. Smith will provide kits as demand warrants through our Parts Department, phone no.
1-800-433-2545. Prices, dimensions and specifications are subject to change without notice.

Each conversion kit is to be installed by an A.O. Smith service agent or a gas utility serviceman in accordance with
A.O. Smith’s written instructions and all codes and requirements of the authority having jurisdiction. Failure to follow
instructions could result in serious injury or property damage. The utility performing this work assumes responsibility for
this conversion.

Changing the Input on Gas Water Heaters

The only changes to the input of a gas water heater allowed are:

• Adjustments to match that shown on the rating plate of the heater. The installation instructions supplied with the
heater indicate if adjustments to input are a required procedure.

• Changes made as required to adjust the heater for proper operation at high altitude as determined by a qualified
service technician. Service manuals include the proper procedure for adjusting heaters at high altitudes.

Conversion of Gas Water Heaters

The conversion of LP gas (Propane) to Natural gas is ONLY allowed providing:

• The conversion is done as part of a gas utility’s program where propane appliances were installed anticipating the
completion of natural gas service to the area. The conversion must be done under the direct supervision of the
utility and by their service representatives.

Claims of damage or injury arising from the unauthorized conversion of any A.O. Smith water heater not design certified for
conversion will be the complete and total responsibility of the person or entity making the conversion.

If you have any questions regarding the above policy, please contact the A.O. Smith Parts Department at 1-800-433-2545 or
our Technical Information Center at 1-800-527-1953.

A.O. SMITH WATER PRODUCTS CO., INC.

5621 W. 115TH STREET • ALSIP, ILLINOIS 60803

FAX: [phone] • www.hotwater.com

Printed in the U.S.A. 2574 04/00 No. 137 Rev. 2

PHONE: [phone]

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PSD-3-141/b

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COMMERCIAL POWER BURNER COPPER BOILER PARTS LIST

LEGEND 2000 MODELS LW/LB-1000

SERIES 920 & 951

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Ball Valve. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1

*2

*4

*6

10
11
12
13

Control, Tank Temperature LW Models. . . . . . . . . . . . . . . . . .

Hex Reducing Bushing (for use w/relief valve):

3

LWModels LBModels Orifice, Gas Assembly Relief Valve:

5

LWModels LB Models. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Strap, Cable Tee, Condensate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7

Tee (for use w/relief valve):

8

LW Models. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

LBModels Tee, 2" . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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Tee,2"x2"x3/4" Valve, Drain Valve, Manual Shutoff. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Vent Patch Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. Not illustrated.

.. On LB models the circulating pump must be installed between

the boiler inlet and the bypass. LW models have pump mounted
inside jacket.

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Description

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BY-PASS KIT PARTS LIST

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LEGEND 2000

1--9

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Part Numbers

Model

1000

191935
99058-1

91940-1
91940-8

See Orifice Table

98883-3
98883-2
99592-2
192040-1

78685-2
78685-5

191584
78685-4
26273
3423-3

192161

A.O. SMITH WATER PRODUCTS CO., INC.

PRINTED IN U.S.A. May 1996

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PHONE: [phone] . FAX: [phone] . WWW.HOTWATER.COM

5621 W. 115TH STREET. ALSIP, ILLINOIS 60803

LEGEND 2000 PARTS LIST A

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Bracket, Cover BurnerandConeAssembly Bushing, Temp. Sensing. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1
2
3
4

Combustion Chamber Assembly Connector, Hose. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5

Control, Dual Limit (for LB) ,...,..,..,..."."..,.".,

6

Control, Dual Limit (for LW) Coupling, Flexiblew/Gasket Cover. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7
8
9

10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
25
26
27
28
29
30

Gasket, Outer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Gasket,PlateAssembly Gasket, Inner. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

HousingAssembly Igniter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Insulation, Burner Nut, Manifold. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

O-Ring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Power Supply, Temperature Indicator. . . . . . . . . . . . . . . . . . . .

Screw, Machine #8-32 SST . . . . . . . . . . . . . . . . . . . . . . . . . . .

Sealer,Silicone Sensor, Temperature w/Temperature Indicator. . . . . . . . . . . . .

Spacer, Ring Switch, Safety Flow. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TeeAssembly Tube Assembly, Primary (LW Models) Tube Assembly, Primary (LB Models) . . . . . . . . . . . . . . . . . . . .

Tube Assembly, Outlet Tube Assembly, Secondary ,."..., ", , Washer, Flat #8 SST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Well,TemperatureSensor Restrictor Air, Top Cover. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Description

Part Numbers

Model

1000

191602
191850-2
191908
192129
191765
191671
191671-1
191780-1
192155
191563-1
191564-1
191563
191627-4
192334
191618
191555-1
191556-2
191905
191770
191482-1
191910
191554-1
78168

192387
192388
192225
192224
192386
191768
191907
191926-1

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