Gas Tankless Water Heater
TM
Suitable for combination potable water heating 
and space heating.  Please refer to local codes for 
space-heating compliance.
If you have any questions,
please call or write to
USA: 500 Tennessee Waltz Parkway
Ashland City, TN 37015
Toll Free: 1-877-737-2840
CANADA: 599 Hill Street West
Fergus, ON N1M 2X1
1-888-479-8324
On-Demand Water Heater
Installation Manual and Owner’s Guide
ANSI Z21.10.3 • CSA 4.3
FEATURING
  •  INTEGRATED RECIRCULATION PUMP
  •  ENDLESS HOT WATER
  •  ON-DEMAND USAGE
  •  COMPACT, SPACE SAVING
  •  ENERGY CONSERVATION
  •  COMPUTERIZED SAFETY
  •  NO PILOT LIGHT
  •  Complies with SCAQMD Rule 
1146.2 for natural gas NOx 
emissions of 14 ng/J or 20 ppm.
  •  EASY-LINK SYSTEM
Keep this manual near the water heater for future reference whenever maintenance, adjustment or service is required.
-  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.
Models
• 540PIndoor
• 540POutdoor
R
DR