A.O. Smith TWI 35-200, Installation, User And Service Manual

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9 Conversion of gas type
Caution
Conversion of the water heater may only be carried out by a qualified person.
Use a special conversion kit to converse the water heater when:
• The water heater has to operate on a different family of gases (liquid petroleum gas
or natural gas).
• The water heater has to operate on a gas category other than that for which the
water heater has been configured at the factory.
You can order the conversion kit you need from the supplier of your water heater. The
conversion kit contains all the parts needed to do the conversion and a description of how
to do the conversion.
The following conversions are possible:
• Conversion from natural gas to LPG.
• Conversion from LPG to natural gas.
• Conversion from natural gas to natural gas.
Caution
After the conversion, make sure that the water heater is gas-tight. Make sure that the
supply pressure, the gas control valve pressure, the CO
2
value and the switching
pressure have the correct value.
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