Rheem Tankless Water Heater User Manual

Page of 36
Safety Information
Safety Precautions. . . . . . .  3–6
LP Gas Models . . . . . . . . . . .  5
Installation Instructions
Location, Outdoor. . . . . . . . . . 7
Location, Indoor . . . . . . . . . 8, 9
Venting . . . . . . . . . . . . . .  10-15
Water Connections. . . . .  16-18
Gas Supply. . . . . . . . . . . . . .  19
High Altitude . . . . . . . . . . . . 19
Remote Control . . . . . . . 20, 21
Electrical Connection . . . . . . 22
Typical Installation . . . . . . . . 23
Pipe Insulation . . . . . . . . . . . 24
Installation Checklist . . . . . . 25
Operating Instructions
Lighting Instructions . . . . . .  26
Water Temperature. . . . . 27, 28
Care and Cleaning
Maintenance. . . . . . . . . . . . .  29
Housekeeping . . . . . . . .  29, 30
Vent Inspection . . . . . . . . . . . 30
Burner Inspection . . . . . . . .  30
Extended Shut-Down . . . . . . 30
Draining . . . . . . . . . . . . . . . .  31
Freeze Protection . . . . . . . . . 31
Troubleshooting Tips
Before You Call
For Service. . . . . . . . . . .  32, 33
Customer Service
Parts List. . . . . . . . . . . . . . . .  34
If You Need Service. . . . . . . 36
Inside you will find many helpful hints on how to use and
maintain your water heater properly. A little preventive care on
your part can save you time and money over the life of your
water heater.
You’ll find many answers to common problems in the
Troubleshooting Guide. If you review the chart of
Troubleshooting Tips first, you may not need to call for service.
READ THIS MANUAL
FOR YOUR RECORDS
Write the model and serial numbers here:
#
#
You can find them on a label on the appliance.
Staple sales slip or cancelled check here. 
Proof of the original purchase date is needed to obtain service
under the warranty.
2
Your safety and the safety of others are very important.  There
are many important safety messages in this manual and on
your appliance. Always read and obey all safety messages.
This is the safety alert symbol. Recognize this symbol
as an indication of Important Safety Information!
This symbol alerts you to potential hazards that can
kill or hurt you and others.
All safety messages will follow the safety alert symbol and
either the word “DANGER”, “WARNING”, “CAUTION” 
or “NOTICE”.
These words mean:
DANGER
An imminently hazardous situation 
that will result in death or serious 
injury.
WARNING
A potentially hazardous situation that 
could result in death or serious injury
and/or damage to property.
CAUTION
A potentially hazardous situation that 
may result in minor or moderate 
injury.
Notice:
Attention is called to observe a 
specified procedure or maintain 
a specific condition.
!
!
!
!
READ THE SAFETY INFORMATION
Qualified Installers Only!
Dip Switch Adjustment . . .  35