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Water Heaters

Electric

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, for the owner–operator, 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 do not 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 warranty.

Do not destroy this manual. Please read 

carefully and keep in a safe place for future 

reference.

!

 

Recognize this symbol as an 

indication of Important Safety 

Information!

!

 

California Proposition 65 Warning:

 

This product contains chemicals 

known to the State of California to 

cause cancer, birth defects or other 

reproductive harm.

Single and Double Element Models,  

15–105 Gallon

1298-001  (01/10)     

 

Printed in USA

Use & Care Manual

With Installation Instructions for the Installer

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http://waterheatertimer.org/Review-Rheem-Marathon-water-heater.html

 

Summary of Contents for 15

Page 1: ...ctions 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 purc...

Page 2: ...of your water heater You ll find many answers to common problems in the Before You Call For Service section If you review our chart of Troubleshooting Tips first you may not need to call for service...

Page 3: ...this manual for detailed instructions in how to adjust the thermostat s 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 b...

Page 4: ...Office of the State Architect 1102 Q Street Suite 5100 Sacramento CA 95811 or you may call 916 445 8100 or ask a water heater dealer However applicable local codes shall govern installation For reside...

Page 5: ...ctical to the area of greatest heated water demand Long un insulated hot water lines can waste energy and water Place the water heater in such a manner that the thermostat and element access panels ca...

Page 6: ...e water heater and system piping This rapid pressure increase can quickly reach the safety setting of the relief valve causing it to operate during each heating cycle Thermal expansion and the resulti...

Page 7: ...approved for hot water distribution The discharge line must be no smaller than the outlet of the valve and must pitch downward from the valve to allow complete drainage by gravity of the relief valve...

Page 8: ...id damaging the unit WARNING Failure to follow the instructions provided in this manual may permanently damage the unit and void the manufacturer s warranty NOTICE Do not attempt to turn any fitting c...

Page 9: ...using metal strapping or wire fastened to the structure overhead Seal Ring Inside nut Hex Union Nut Relief Valve No threads permitted on end of Drain Pipe 6 Maximum distance from drain pipe to suitabl...

Page 10: ...he water heater The branch circuit wiring should include either Metallic conduit or metallic sheathed cable approved for use as a grounding conductor and installed with fittings approved for the purpo...

Page 11: ...eAWG Based on N E C Table 310 16 75 C 120V 240V 120V 240V 2 000 20 12 3 000 20 12 3 800 20 12 4 500 25 10 11 Wiring Diagrams SINGLE ELEMENT 2 1 2 THERMOSTAT HIGH TEMP LIMIT ECO HEATING ELEMENT WHITE Y...

Page 12: ...The use of unauthorized energy saving devices may shorten the life of the water heater and may endanger life and property The manufacturer disclaims any responsibility for such loss or injury resulti...

Page 13: ...room to service heater Water heater completely filled with water Air purged from water heater and piping Water connections tight and free of leaks Temperature and Pressure Relief Valve properly instal...

Page 14: ...in until it has been thoroughly checked by qualified service personnel DANGER There is a hot water scald potential if the thermostat is set too high Households with small children disabled or elderly...

Page 15: ...ion pads The thermostat protective cover should not be removed Using a small screwdriver set the thermostat dial pointer to the desired temperature by turning the screw Do not pry or move the white pl...

Page 16: ...rge line to an open drain A water heater s tank can act as a settling basin for solids suspended in the water It is therefore not uncommon for hard water deposits to accumulate in the bottom of the ta...

Page 17: ...ke sure electric supply to water heater and disconnect switch if used are in the ON position The thermostat may be set too low See the Temperature regulation of the water heater section of this manual...

Page 18: ...crew 8 16 x 5 8 12 Upper Thermostat 13 Upper Protector 14 Screw 10 16 x 5 8 15 Thermostat Cavity Insulation 16 Upper Access Panel 17 Screw 10 16 x 5 8 18 Access Panel Cover Insulation 19 Access Panel...

Page 19: ...19 Replacement Parts 30 105 gallon models 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 19 18 17 24 15 14 23 22 25 20 26 7 3...

Page 20: ...Replacement Parts 15 20 gallon models 20...

Page 21: ...available for purchase through your water heater distributor NOTICE Make sure the threads on the unit are clean Brush debris off of threads with a toothbrush if needed NOTICE The elements are unique t...

Page 22: ...resulting from improper installation or failure to operate and maintain the water heater in accordance with the manufac turer s instructions provided d Performance problems caused by improper sizing o...

Page 23: ...ent regulations or industry certification or similar standards require the replacement water heater or replacement component part s to have features not found in the defective water heater or the defe...

Page 24: ...er Information Name Address Plumber Mechanical Contractor Installer Information Name Address Telephone Number Water Heater Information Model Number Serial Number Date of Installation FOR YOUR RECORDS...

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