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CATALOG NO. 3400.53A
Effective: 8-1-06
Replaces: 6-15-06
P/N 241288 Rev 2
INSTALLATION
AND OPERATING
INSTRUCTIONS
Models 503-2003
Types H & WH
FOR YOUR SAFETY
Do not store or use gasoline or other flammable vapors and liquids or other combustible materials in the vicinity of
this or any other appliance. To do so may result in an explosion or fire.
WARNING
Improper installation, adjustment, alteration, service or maintenance can cause property damage, personal injury,
exposure to hazardous materials* or loss of life. Review the information in this manual carefully. Installation and
service must be performed by a qualified installer, service agency or the gas supplier.
* This unit contains materials that have been identified as carcinogenic, or possibly carcinogenic, to humans.
WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electrical switch; do not use any phone in your building.
• Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s instructions.
• If you cannot reach your gas supplier, call the fire department.
This manual should be maintained in legible condition and kept adjacent to the heater or in a safe place for future
reference.