FGR-30, 40, 50, 75, 100 - AO Smith Water Heaters

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. 

GAS WATER HEATER CONVERSION POLICY 

All A.D. 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.D. 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.D. Smith service agent or a gas utility serviceman in accordance with 

A.D. 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. 

Chanaina the InDut 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.a. 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.D. Smith Parts Department at 1-800-433-2545 or 

our Technical Information Center at 1-800-527-1953. 

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

5621 w. 115TH STREET. ALSIP, ILLINOIS 60803 

PHONE: 1-800-433-2545 

FAX: 1-800-433-2515. www.hotwater.com 

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

I 

&c @Jc ~~DvGiJ 

. WATER PRODUCTS 

COMPANY 

PSD-1-280 

RESIDENTIAL WATER HEATER PARTS LIST 

MODELS FGR-30, 40, 50, 75, 100 

SERIES: 224/225 

24 T&P VALVE EXTENDER 

FOR USE WITH PART NO 23740-1 

(FGR-75 & 100 MODELS) 

\r; j 15 

"A" DIMENSION 

PART NO 42931 3 1/4" 

PART NO 42931-1 2" 

"'A~ 

Y 

17 

' " 

3 I [J 

2-- 

4, ~ 

-~),,

~ 

RENRUBRENRUB ASEMBLY, MAIN - Natural 

.raloC Pipe 

ROD 

,regnaHeulF Bafle 

,rotcirtseR Flue Bafle 

.renruB Main - Natural 

.ecifirO,ecifirO Main - Natural 

.ebuT elpuocomrehT Main - Propane 

.ebuT Main Burner - Natural 

.ebuT Main Burner - Propane 

.renruB,renruB Main - Propane 

.renruB Pilot - Natural 

Pilot 

ASEMBLY. MAIN - Propane 

Flue Bafle 

Pilot - Propane 

TAEHtfarD retuO Iner Hod 

TRAP . . . ("T" Models) 

. 

LEBAL 

.teltuO 

telnI . . 

tatsomrehTtatsomrehT - Natural 

.ebuT - Propane 

.elpiN.elpiN Extension 

,evlaV.evlaV Drain 

AMS S4 

gnithgiL.elbamalF. Warning 

dlacS. & Operating 

erutarepmeT" Warning 

"Manual. Instruction 

tresnI" Shet 

edonA Heat Trap. Inlet 

,ebuT Inlet 

Inlet 

Relief 

Pipe 

.evelS.elpiN . . . . 

AMS H43 

"hl'T .elpiNtaeH Trap. Inl,' 

Inlet 

0.84" Dia. Anode 

edonA BURNER ASEMBLY, MAIN - Natural 

I,NniW 

.launaM Earthquake Instruction 

xoN.elpiN . . . 

tresnI Shet 

,ecifirOrenruB Head Asembly 

Flame Spreader Asembly - Natural 

Main - Natural 

Item 

1 

Description 

Anode BAFFLE 

... 

FGR-30 

224/225 

43817-42 


224/225 

43817-38 


224/225 

43817-42 


224/225 

180618-42 


224/225 

180618-50 

2 

3 

4 

5 

6 

7 

8 

9 

10 

11 

12 

181589 

181360 

34894 

181480-4 

181780 

180940 

180940-1 

181508-31 


~ 

181482-2 

181796-2 


20172-14 

181589 

181360 

34894 

181480-33 

181780-12 





~ 

181482-10 

181796-10 


20172-14 

181589 

181360 

34894 

181480-8 

181780-2 





~ 

181482-5 

181796-5 


20172-14 

10089-1 

34505 

180653-4 

181786 

41157-1 

41157 

~ 

160228-1 

29366-23 

181778-37 

~ 

190200-1 

181785 


20172-6 

160698-1 

34505 

180653-5 

181786-1 

41157-2 

41157-1 

~ 

160228-1 

29366-19 

181778-37 

~ 

190200-2 

181785 


20172-6 

13 

14 

15 

180522 

180596 

181082 

180522 

180596 

181082 

180522 

180596 

181082 

39112-1 

39923 

39072 

39112-1 

39923 

39072 

16 

17 

181068-35 

181235 

181068-35 

181235 

181068-35 

181235 

18 

19 

20 

21 

22 

23 

24 

25 

26 

27 

28 

29 

181139 

182553 

181138 

182734 

182581 

181638 

180193-4 


21067-37 

42037-2 

43151-2 

181139 

182553 

181138 

182734 

182581 

181638 

180193-4 


21067-37 

42037-2 

43151-2 

181139 

182553 

181138 

182734 

182581 

181638 

180193-4 


21067-37 

42037-2 

43151-2 

181139 

182554 

181138 

182734 

182581 

43231-1 

43879 

m.3..6. 


41072-29 

26273 

43151-2 

181139 

182554 

181138 

182734 

182581 

43231-1 

41319 

~~ 


40542-30 

26273 

43151-2 

1 

18 

28 

33 

29109-42 

181295-35 

182380 

29109-38 

181295-35 

182380 

29109-42 

181295-35 

182380 

29109-42 

86979-5 

182380 

41Q~1-?Q 


92706-3 

182380 

41q~?-~n 

18 

28 

~~ 

181295-35 181295-35 181295-35 

86979-5 

41~1?-?Q 

92706-3 

41~14-4n 

1 

5 

6 

7 

24 

25 

28 

181125-42 

181480-13 



181809 

182552 

38469-4 

181101 

1RnR?Q 

181125-38 

181480-35 


181508-3~ 

18180" 

182552 

38469-4 

181101 

1RnR?Q 

181125-42 

181480-15 



181809 

182552 

38469-4 

181101 

1~n~'Q 

1 

5 

BURNER ASSEMBLY. MAIN - Natural. 

181125-42 

181480-10 

181125-38 

181480-34 

161125-42 

161460-12 

7 

24 

25 


181809 

182552 


181809 

182552 


161609 

162552 182552 

?R ~R4F;Q-4 ~R4~A-4 ~R4"Q-4 

tresnI.launaM Ninni.. 

,ecifirO Shet 

Earthquake Main - Natural 

Instruction 

1 Anode , 43816-42 43816-38 43816-42 29109-42 29109-50 

SMA K32 

1 Anode 43816-42 43816-38 43816-42 29109-42 29109-50 

5 BURNER ASSEMBLY, MAIN - Natural 181480-10 181480-34 181480-12 180653-8 180653-9 

7 Orifice, Main - Natural 181508-32 181508-32 181508-32 29366-26 29366-21 

11 Tube, Main Burner-Natural 181482-2 181482-10 181482-5 190200-5 190200-6 

SMA High Altitude S29 Assembly - 

182573 182573 182573 182573 182573 

1 Anode 43816-42 43816-38 43816-42 

Ninni" 38469-10 38469-10 38469-10 

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

. Not illustrated.

FGR-30, 40, 50, 75, 100 - AO Smith Water Heaters

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