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Time/Temperature Relationship in Scalds

Water Temperature

Time To Produce a Serious Burn

120°F

More than 5 minutes

125°F

1

1

/

2

to 2 minutes

130°F

About 30 seconds

135°F

About 10 seconds

140°F

Less than 5 seconds

145°F

Less than 3 seconds

150°F

About 1

1

/

2

seconds

155°F

About 1 second

Table courtesy of Shriners Burn Institute

The chart shown above may be used as a guide 
in determining the proper water temperature for
your home.

DANGER:

Households with small children,

disabled, or elderly persons may require a 120°F 
or lower gas control (thermostat) setting to prevent
contact with “HOT” water.

Maximum water temperatures occur just after the
burner has shut off. To find water temperature being
delivered, turn on a hot water faucet and place a
thermometer in the water stream and read the
thermometer. (See pages 17 and 18 for more details.)

The temperature of the water in the heater can 
be regulated by setting the temperature dial 
on the front of the thermostat. To comply with
safety regulations the gas control (thermostat)

was set 
at its lowest setting
before the water heater
was shipped from the
factory. 

The illustration at the
left details the
approximate water
temperature for each
mark on the Gas
Control (Thermostat)
Temperature Dial.

DANGER:

Hotter water increases the Potential 

for Hot Water SCALDS.

!

!

D A N G E R

!

HOT

Water temperature over 125

°

F can

cause severe burns instantly or
death from scalds.

Children, disabled and elderly are
at highest risk of being scalded.

See instruction manual before
setting temperature at water
heater.

Feel water before bathing or
showering.

Temperature limiting valves are
available, see manual.

BURN

DANGER!

WATER TEMPERATURE SETTING

!

Safety and energy conservation are factors to be considered when selecting the water
temperature setting of a water heater’s thermostat. Water temperatures above 125°F 
can cause severe burns or death from scalding. Be sure to read and follow the warnings
outlined on the label pictured below. This label is also located on the water heater.

Notice:

Mixing valves are available for reducing point

of use water temperature by mixing hot and cold
water in branch water lines. Contact a licensed
plumber or the local plumbing authority for further
information.

WA

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V

A

C

A

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T

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ISK OF S

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H O T T

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R

W A R N I N G

READ ALL INSTRUCTIONS
BEFORE

LIGHTING

130°F 

Temperatures are

approximate

120°F 

140°F 

150°F 

160°F 

110°F 

100°F 

90°F 

80°F 
70°F 

60°F 

Customer Service

T

roubleshooting Tips

Care and Cleaning

Operating Instructions

Installation Instructions

Safety Instructions

4

IMPORTANT SAFETY INFORMATION.

READ ALL INSTRUCTIONS BEFORE USING.

Summary of Contents for AP13204-4

Page 1: ...ition System The purpose of this manual is twofold one to provide the installer with basic directions and recommendations for the proper installation and adjustment of the water heater and two for the...

Page 2: ...te is needed to obtain service under the warranty IMPORTANT Fill out and return the Consumer Product Registration Card that is in the back of this manual If you do need service you can relax knowing h...

Page 3: ...ate air supply for proper operation Be sure to inspect the vent system for proper installation at initial start up and at least annually thereafter Refer to the Care and Cleaning section of this manua...

Page 4: ...re Dial DANGER Hotter water increases the Potential for Hot Water SCALDS D A N G E R HOT Water temperature over 125 F can cause severe burns instantly or death from scalds Children disabled and elderl...

Page 5: ...federal state and or local laws rules regulations or customs 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...

Page 6: ...a qualified technician SAFETY PRECAUTIONS IMPORTANT SAFETY INFORMATION READ ALL INSTRUCTIONS BEFORE USING WARNING For your safety the information in this manual must be followed to minimize the risk o...

Page 7: ...not allow the water heater to ignite until examined by a Qualified Service Technician The water heater must be located so it is not subject to physical damage for example by moving vehicles area flood...

Page 8: ...directly or through vertical ducts there must be two openings located as specified above and each must have a minimum net free area of not less than one square inch per 4000 Btuh of the total input r...

Page 9: ...nk is designed with an air cushion built in that compresses as the system pressure increases thereby relieving the over pressure condition and eliminating the repeated operation of the relief valve Ot...

Page 10: ...lve and discharge line The end of the discharge line should not be threaded or concealed and should be protected from freezing No valve of any type restriction or reducer coupling should be installed...

Page 11: ...than 3 8 psi 10 5 w c for natural gas or 1 2 psi 14 w c for LP gas Gas Supply The branch gas supply line to the water heater should be clean 1 2 black steel pipe or other approved gas piping material...

Page 12: ...Blankets Insulation blankets available to the general public for external use on gas water heaters are not necessary The purpose of an insulation blanket is to reduce the standby heat loss encountered...

Page 13: ...the venting system complies with the guidelines found in the Use and Care Manual and National Fuel Gas Code DO contact a Qualified service technician if the pilot or main burner will not stay lit The...

Page 14: ...nt room to service heater Combustible materials such as clothing cleaning materials rags etc clear of the base of the heater Clearances from combustion air inlet openings observed see page 7 Gas Suppl...

Page 15: ...c chemicals such as those used for boiler treatment into this system Tee fitting for horizontal hot water supply lines Hot water supply to house From HOT outlet on water heater From HOT outlet on wate...

Page 16: ...heater be sure to read and follow the instructions on the label pictured below and all other labels on the water heater as well as the warnings printed in this manual Failure to do so can result in u...

Page 17: ...ps to accumulate near water heater Do Not store or use gasoline or other flammable vapors and liquids such as adhesives or paint thinner in vicinity of this or any other appliance If such flammables m...

Page 18: ...ken The hottest temperature water will be at the top of the tank closest to the outlet pipe delivering hot water to the home Stacking can cause this top layer of water to be hotter than the water towa...

Page 19: ...rs of dependable trouble free service It is recommended that a periodic inspection of the gas control thermostat burner relief valve internal flue way and venting system should be made by service pers...

Page 20: ...g shut down period the water heater s operation and controls should be checked by qualified service personnel Make certain the water heater is completely filled again before placing it in operation NO...

Page 21: ...ed by a clogged qualified service technician Gas Cock Knob not See the Lighting The Water Heater section of this correctly positioned manual Pilot does not stay Loose thermocouple The connection at th...

Page 22: ...essary relight using the instructions in the Lighting The Water Heater section of this manual The gas control thermostat See the Water Temperature Setting of The Water may be set too low Heater sectio...

Page 23: ...Safety Instructions Installation Instructions Operating Instructions Care and Cleaning Troubleshooting Tips Customer Service 23 Notes...

Page 24: ...Customer Service Troubleshooting Tips Care and Cleaning Operating Instructions Installation Instructions Safety Instructions 24 Notes...

Page 25: ...Tube The kit provides extra speed clips and tamper resistant screws Not supplied with all models Burner Assembly Kit Heat Trap Nipple Heat Trap Nipple Replacement parts For 30 40 and 50 gallon models...

Page 26: ...Manufacturer s National Service Department at the following address 2600 Gunter Park Drive Montgomery AL 36109 1413 When contacting the manufacturer the following information will be requested Model a...

Page 27: ...Rheem Manufacturing Company Warranty Registration Department P O Box 34070 Louisville KY 40232 4070 Please place in envelope and mail to Cut here Cut here 27...

Page 28: ...rs Miss Street Address City State Date Placed In Use Month Day Year Zip Code Apt Last Name Phone Number _ _ Complete and mail this Consumer Product Ownership Registration today After mailing the regis...

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