Installa on Instruc ons and
Use & Care Guide
ADAPT™ Residen al Gas
Tankless Water Heaters
Residen al On-Demand Gas Tankless Water Heaters
Read this manual and the labels on the water heater before you install,
operate, or service it. If you have diffi culty following the direc ons, or
aren't sure you can safely and properly do any of this work yourself:
•
Call our Technical Assistance Hotline which is listed on your warranty. We can
help you with installa on, opera ons, troubleshoo ng, or maintenance. Before
you call, write down the model and serial number from the water heater's ra ng
plate.
•
Incorrect installa on, opera on, or service can damage the water heater, your
house and other property, and present risks including fi re, scalding, electric
shock, and explosion, causing serious injury or death.
WARNING: If the informa on in these instruc ons
is not followed exactly, a fi re or explosion may
result causing property damage, personal injury or
death.
Do not store or use gasoline or other fl ammable 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 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 instruc ons.
• If you cannot reach your gas supplier, call the fi re de-
partment.
Installa on and service must be performed by a qualifi ed
installer, service agency or the gas supplier.
Keep this manual with the heater for future reference whenever maintenance, adjustment or service is required.
(X3™ TECHNOLOGY available on some models)
Retain your original receipt as proof of purchase.
MODELS:
THR-160M, THR-180M, THR-199M
THR-160X3, THR-180X3, THR-199X3
LOW LEAD
CONTENT
100380402_2000628591
June 2024
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