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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: 1-800-433-2515 • www.hotwater.com
Printed in the U.S.A. 2574 04/00 No. 137 Rev. 2
PHONE: 1-800-433-2545
22b
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2 jacket base 193819 193819
3 main burner orifice bracket 98044(5) 98044(5)
4 main burner 98047 98047
5 main burner w/pilot bracket 193873-1 193873-1
6 pilot burner, natural 193314-4 193314-4
7 .193314-3
8 9
11 ...
12 ...
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17 ~~ . ~ 18 control, dual w/eco 19 cover, cleanout 20 cover, inner 21 '.'.'.".' jacket cover 22a drafthood assembly 22b 22c 23
24 ..
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28 ultra coat .
29 eco instruction 30 flammable vap(lr...
181260 181260
193608 193608
97062-7 97062-7
192957 192957
:_~:~~ ~::::
... . 193860 193860
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31 helpline...
32 instruction
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40 .- oJ ,-- - - -- - ~ ~ ~ --
41 manifold 76244-2 76244-2
42 instruction manual 194027 194027
43 main burner orifice, natural 76243-32 76243-32
44 main burner orifice, Ip 76243-49 76243-49
45 anode rod 43817-42 43817-42
46
47 48 49 50 51 52 53 - . . , . - - . - - , . - - . --
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54 ground wire , 77948-7 77948-7
55 switch panel/mounting plate 193448 193448
56 off/on switch 193243 193243
57 bushing 193404 193404
58 jumper wire 193476 193476
59 control box panel 193447 193447
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