![background image](http://html.mh-extra.com/html/american-water-heater/240hx3/240hx3_installation-manual-and-owners-manual_2930027001.webp)
Gas Tankless Water Heater
TM
Do not install the water heater with a recircula-
tion loop. Suitable for potable water heating only.
On-Demand Water Heater
Installation Manual and Owner’s Guide
If you have any questions, please call
or write to:
In the United States
500 Tennessee Waltz Parkway
Ashland City, TN 37015
Toll Free: 1-877-737-2840
- Do not store or use gasoline or other
flammable vapors and liquids in the vicinity
of this or any other appliance.
- WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electric 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.
- Installation and service must be performed
by a qualified installer, service agency or the
gas supplier.
WARNING
If the information in these
instructions is not followed
exactly, a fire or explosion may
result causing property damage,
personal injury or death.
Keep this manual near the water heater for future reference whenever maintenance, adjustment, or
service is required.
FEATURING
• ENDLESS HOT WATER
• ON-DEMAND USAGE
• COMPACT, SPACE SAVING
• ENERGY CONSERVATION
• COMPUTERIZED SAFETY
• NO PILOT LIGHT
• X3™ TECHNOLOGY
• Complies with SCAQMD Rule
1146.2 for natural gas Low NOx
Emissions of 14 ng/J or 20 ppm.
ANSI Z21.10.3
・
CSA 4.3
Models
240HX3
340HX3
540HX3
Summary of Contents for 240HX3
Page 64: ...3PL009 2000599585 Rev B ...