A. O. Smith FSG-40C 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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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]

/I\r-. ro-)r-. ~riVAln~

.

-- - - - --

COMPANY

PSD-1-274

@£~-

RESIDENTIAL WATER HEATER PARTS liST

MODELS FSG/PGX-30, 40, 40C & 50

SERIES: 216/217

PRINTED IN U.S.A.

r2 I BURNER ASSEMBLY

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

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

5621 W. 115TH STREET. ALSIP,ILLINOIS 60803

January 1997

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Item

1 ANODE

FSG Models 43817-25 43817-29 43817-29 43817-35
PGXModels 180618-44 180618-42 180618-44

2 BURNER ASSEMBLY, MAIN - Natural 181091-4 181087-4 181087-4 181089-0

BURNER ASSEMBLY, MAIN - Propane 181091-5 181087-5 181087-5 181089-1

3 Burner Head/Pibt - Natural ~ 1809.40 ~ ~

Burner Head/Pibt - Propane 18Q9.4.Q:! 18Q9.4.Q:! 18Q9.4.Q:! 18Q9.4.Q:!

4 Orifice, Main Burner - Natural 29366-37 29388-37 29388-37 29366-31

Orifice, Main Burner - Propane 181510-52 181510-52 181510-52 181510-48

5 Thermocouple 23.6Z5 23.6Z5 ~ ~
6 Orifice, Pi~ - Natural 180814 180814 180814 180814

Orifice, Pilot - Propane 180824 180824 180824 180824

7 Tube, Main Burner - Natural 41246-1 41246-2 41246-2 41246-3

Tube, Main Burner - Propane 41246-1 41246-2 41246-2 41246-3

8 Tube, Piot 23330 23330 23330 23330

9 . Caver, Cleanout - - - - - - - - 38445 - - --

10 Din Leg Assembly - Propane 181206 181206 181206 181206

DOOR
11 Outer 180522 180522 180522 180522
12 Inner 180596 180596 180596 180596
13 Draft Hood 39664 39664 39664 39664
14 FkJe Batlle ""'.""" 181211 181211 181211 180819

15 FkJe RestrX:tor - - - - - - - - - - - - 34894

HEAT TRAP ("T. Models)

16 Inlet 181068-33 181068-33 - - - - 181068-35
17 Outlet 181235 181235 - - - - 181235

18 . Ins~ation - - - - - - - - 43307 - - --

LABEL
19 .FlammableVaporWarning 181139 181139 181139 181139

20 . Ughting & Operating 180310 180310 180310 180310
21 . Scald Warning 181138 181138 181138 181138
22 . Temperature 182734 182734 182734 182734
23 . Instructk>n Manual 181658 181658 181658 181658

24 . Instructk>n Sheet ... - - - - - - - - 180879 - - - -

25 Nul. Compression 32365 32365 32365 32365
26 Pipe Cdlar 20172-14 20172-14 20172-14 20172-14
27 Spacer, Inlet Tube , 42589-1 42589-1 42589-1 42589-1
28 THERMOSTAT

Natural 1eo.193:2 1eo.193:2 18Q1.9.3:2 1.80.1.93:2

Description

21&1217

F~WP(jX-40

2161217

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2161217

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216/217

Propane , 180.192:2 180192.:2 16Q19Z:2 1QQle2:2

29 Tube, Inlet 160374-26 160374-26 160374-26 160907-35

VALVE
30 Drain 42037 42037 42037 42037-1
31 Main Gas Shutoff 181737 181737 181737 181737

SMA S44

16 Heat Trap, Inlet """""..."".."""".'.""'..'.""""'...'.'... 181295-33 181295-33 - - - - 181295-35

29 Tube. Inlet 160375-26 160375-26 160375-26 160501-35

SMA H43

16 Heat Trap, Inlet 181295-33 181295-33 - - - - 181295-35

29 Tube, Inlet 160375-26 160375-26 160375-26 160501-35

,,~...~D""~f "7~~""7 "7~~""7 "7~~""7 ""'~'

SMR R99

2 BURNERASSEMBLY,MAIN.Nalural 181089-6

3 .BumerHeadAssembly 180940-2
4 .Orifice, Main Bumer-Natural 29366-34

23 Manual,EarthquakelnstructM:>n 181809

NoxFlameSpreaderAssembly-Nalural 181101

Win Nut Flame S reader ... - - - - - - - - - - - - 160629

SMR SO6
2 BURNERASSEMBLY,MAIN-Natural 181089-2
4 .Orifice, Main Bumer-Natural 29366-32

-

23 Manual, Earth uake InstructM:>n """"""""""'.'..' """ 181809 181809 181809 181809

SMR S19

1 ANODE

FSG Models , 43816-42 43816-38 43816-38 43816-44

PGX Models 29109-44 29109-42 - - - - 29109-44

SMR K32
2 BURNER ASSEMBLY, MAIN - Natural 181091-6 181087-6 181087-6 181089-3

4 Orifice, Main Bumer- Natural 29366-40 29366-40 29366-40 29366-33

SMR 529

1 Anode - - - - 43816-38 - - - - 43816-42

Ni Ie """".".. - - - - 38460-10 - - - - 38469-10
5MR S45

1 Anode, Outlet 181125-42 181125-42 181125-42

Nipple 38469-4 38469-4 - - - - 38469-4

Pipe Plug , 92650 92650 - ... 92650

Valve. Relief ... 98987 98987 - - - - 98987
5MR522

10 Dirt Leg Assembly. Propane 181206-1 181206-1 181206-1 181206-1
14 Flue Baffle.. 181211-1 181211-1 181211-1 - - --

20 LabeI- Ughting & Operating , 161043 161043 161043 161043
23 Manual, Instruction 180586 180586 180586 180586

Tube, Relief Valve Runoff 180667 180667 180667 180667
Valve Relief .. 76527 76527 76527 43151
5MR P83

Valve Relief .. ... 76527 76527 76527 4 1 1

Note: Underlined parts are recommended stock items for emergency replocement. Consider gas used in your area only

. Not illustrated

'T" denotes heat trap models