Rheem Residential Indoor Gas Tankless Water Heater User manual

Residential Indoor Gas
Tankless Water Heater
Warning: This water heater is not suitable
for use in manufactured (mobile) homes!
The purpose of this manual is twofold: one, to provide the
installer with the basic directions and recommendations
for the proper installation and adjustment of the water
heater; and two, to the owneroperator, to explain the
features, operation, safety precautions,maintenance and
troubleshooting of the water heater. This manual also
includes a parts list.
It is imperative that all persons who are expected to install,
operate or adjust this water heater read the instructions
carefully so they may understand how to perform these
operations. If you don't understand these instructions or
any terms within it, seek professional advice.
Any questions regarding the operation, maintenance,
service or warranty of this water heater should be directed
to the seller from whom it was purchased. If additional
information is required, refer to the section on If You Need
Service.
Do not destroy this manual. Please read carefully and keep
in a safe place for future reference.
Use&CareManual
With Installation Instructions for the Installer
136,000 BTU Max Input
Recognize this symbol as an indication of Important SafetyInformation!
California Proposition 65 Warning: This product contains chemicals known to the State of
California to cause cancer, birthdefects or other reproductive harm.
WARNING: If the in formation in these instructions is not followed exactly,
a fire or explosion may result causing property damage, personal injury or death.
Do not store or use gasoline or other
flammable vapors or liquids or other
combustible materials in the vicinity of this or
any other appliance. To do so may result in an
explosion or fire.
Do not try to light any appliance.
Do not touch any electrical switch; do not
use any phone in your building.
FOR YOUR SAFETY!
WHAT TO DO IF YOU SMELL GAS
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.
Do not return to your home until authorized
by the gas supplier or fire department.
Improper installation, adjustment,
alteration, service or maintenance can cause
property damage, personal injury, or death.
Refer to this manual. Installation and service
must be performed by a qualified installer,
service agency or the gas supplier.
-
-
-
ON/OFF
UP
DOWN
F
OutputTemp
Set Temp
ErrorCode

Safety Information
Installation Instructions
Operating Instructions
Care and Cleaning
Troubleshooting Tips
Customer Service
Safety Precautions.......3-6
LPGasModels...........5
Location.................7
Water Connections......9-10
Gas Supply..............11
High Altitude............11
Venting..............12.15
Electrical Connection......16
Typical Installation........17
Pipe Insulation........... 18
Installation Checklist......19
LightingInstructions......20
Water Temperature.....21,22
Maintenance.............23
Housekeeping........ 23,24
Vent Inspection...........24
Burnner Inspection.............24
ExtendedShut-Down......24
Draining................25
Before You Call
ForService...........26,27
PartsList............... 28
.........
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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.
FOR YOUR RECORDS
Write the model and serial numbers here:
#
#
You can find them on a label on the appliance.
Proof of the original purchase date is needed to
obtain service under the warranty
Staple sales slip or cancelled check here.
READ THIS MANUAL
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 THE SAFETY INFORMATION
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:
Notice: Attention is called to observe a
specified procedure or maintain
a specific condition.

WARNING!
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Be sure to read and understand the entire Use and Care Manual before attempting to install or operate
this water heater. It may save you time and money. Pay particular attention to the Safety Instructions.
Failure to follow these warnings could result in serious bodily injury or death. Should you have
problems understanding the instructions in this manual, or have any questions, STOP, and get help
from a qualified service technician, or the local gas utility.
IMPORTANT SAFETY INFORMATION.
READ ALL INSTRUCTIONS BEFORE USING.
Failure to properly install the water heater outdoors as outlined in the Installation
Instructions in this manual can result in unsafe operation of the water heater. To avoid
the risk of fire, explosion, or asphyxiation from carbon monoxide, never operate this
water heater unless it is installed properly and has an adequate air supply for proper
operation. Be sure to inspect the flue terminal for proper installation at initial start-up;
and at least annually thereafter. Refer to the Care and Cleaning section of this manual for
more information regarding flue terminal inspection.
DANGER!
INSTALL AND PROPERLY VENT THE WATER HEATER...
Gasoline, as well as other flammable materials and liquids (adhesives, solvents,
paint thinners etc.), and the vapors they produce are extremely dangerous. DO
NOT handle, use or store gasoline or other flammable or combustible materials
any where near or in the vicinity of a water heater or any other appliance. Be sure
to read and follow the labels on the water heater, as well as the warnings printed
in this manual. Failure to do so can result in property damage, bodily injury or
death.

DANGER!
WATER TEMPERATURE SETTING
Safety and energy conservation are factors to be considered when selecting the water
temperature setting . Water temperatures above 125 F
from scalding. Be sure to read and follow the warnings
ocan cause severe burns or death
outlined on the label pictured below.
IMPORTANT SAFETY INFORMATION.
READ ALL INSTRUCTIONS BEFORE USING.
Water temperature over 125 F can
cause severe burns instantly or
death from scalds.
°
Water Temperature Time To Produce a Serious Burn
125 F
o1/
12
to 2 minutes
130 F
oAbout 30 seconds
135 F
oAbout 10 seconds
140 F
oLess than 5 seconds
Table courtesy of Shriners Burn Institute
DANGER: Households with small children,
disabled, or elderly persons may require a 120 F.
Or lower temperature setting to prevent contact
with HOT water.
o
4
The factory setting allows operating
temperatures between 90 F and 140 F.
Notice:
oo
The temperature of the water at the outlet of the
water heater can be regulated by setting the
temperature on control panel . The control panel was
set at 110 F before it was shipped from the factory.
o
The illustration to the bottom left illustrates the
control panel and how to adjust the water
temperature.
Notice: When this water heater is supplying general
purpose hot water requirements for use by
individuals, a thermostatically controlled mixing
valve for reducing point of use water temperature is
recommended to reduce the risk of scald injury.
Contact a licensed plumber or the local plumbing
authority for further information.
The chart shown above may be used as a guide
in determining the proper water temperature for your
home.
Maximum water temperature occurs while burner is
on. To find water temperature being delivered, turn
on a hot water faucet and place a thermometer in the
water stream and read the thermometer.
Children, disabled and elderly are
at highest risk of being scalded.
Temperature limiting valves are
available, see manual.
See instruction manual before
setting temperature at water
heater.
Feel water before bathing or
showering.
Time/Temperature Relationship in Scalds
120 F
oMore than 5 minutes
F
ON/OFF
UP
DOWN
Output Temp
Set Temp
Error Code
145 F
oLess than 3 seconds
150 F
oAbout 1 /
12
seconds
155 F
oAbout 1 second

DANGER!
NATURAL GAS AND LIQUEFIED PETROLEUM MODELS
Both LP and natural gas have an odorant added to aid in detecting a gas leak. Some
people may not physically be able to smell or recognize this odorant. If you are unsure or
unfamiliar with the smell of LP or natural gas, ask the gas supplier. Other conditions, such
as odorant fade , which causes the odorant to diminish in intensity, can also hide or
camouflage a gas leak.
Water heaters utilizing LP gas are
different from natural gas models. A
natural gas water heater will not function
safely on LP gas and vice versa.
No attempt should ever be made to
convert the water heater from natural
gas to LP gas. To avoid possible
equipment damage, personal injury or
f ire, do not connect the water heater to a
fuel type not in accordance with the unit
data plate; propane for propane units
and natural gas for natural gas units.
These units are not certified for any
other fuel type.
LP appliances should not be installed
below grade (for example, in a basement)
if such installation is prohibited by
federal, state and/or local laws, rules,
regulations or customs.
Propane or LP gas must be used with
great caution. It is heavier than air and
will collect first in lower areas making it
hard to detect at nose level.
Before attempting to light the water
heater, make sure to look and smell for
gas leaks. Use a soapy solution to check
all gas fittings and connections. Bubbling
ataconnectionindicatesaleakthatmust
be corrected. When smelling to detect a
gas leak, be sure to sniff near the floor
also.
Gas detectors are recommended in LP
and natural gas applications and their
installation should be in accordance with
the detector manufacturer's
recommendations and/or local laws,
rules, regulations or customs.
It is recommended that more than one
method, such as soapy solution, gas
detectors, etc., be used to detect leaks in
gas applications.
attempt to find the cause yourself.
try to light any appliance.
touch any electrical switch.
use any phone in your building.
Leave the house immediately and make
sure your family and pets leave also.
Leave the doors open for ventilation and
contact the gas supplier, a qualified
service agency or the fire department.
Stay away from the house (or building)
until the service call has been made, the
leak is corrected and a qualified agency
has determined the area to be safe.
Notice: If a gas leak is present or suspected:
Do not
Do not
Do not
Do not
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