Rheem RTG84XLP1, RTG95XLP1 User Manual

CERTIFIED

WARNING:

If the information in these instructions is not followed exactly, a ﬁre or explosion may result, causing death, personal injury, or property damage.

For Your Safety!

• Do not store or use gasoline or other ﬂammable vapors and liquids in the vicinity of this or any other appliance. To do so may result in an explosion or ﬁre.

• Installation and service must

be performed by a qualified installer, service agency, or the gas supplier.

What to Do If

You Smell Gas

TANKLESS

WATER HEATER

USE AND CARE MANUAL

With Installation Instructions for the Installer

Noncondensing 199,900 Btu/hr, 180,000 Btu/ hr, and 150,000 Btu/hr Models

• 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 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.

Do not destroy manual. Please read carefully and keep in a safe place for future reference.

WARNING:

This water heater is not suitable for use in manufactured (mobile) homes.

AP18000 (02/16)

CONTENTS

Important Safety Information

Safety Precautions �� 2–8

Product Information

Product Information �� 8 Specifications �� 9, 10

Safety

General Descriptions ��11, 12

Using Your Water Heater

Setting the Water Temperature �� 13, 14

Caring for Your Water Heater

Water Heater Inspections �� 15, 16 Care and Cleaning ��17, 18 Preventive Maintenance �� 19 Draining the Water Heater �� 20–22 Freeze Protection �� 22 Vacation and Extended Shutdown �� 23 Troubleshooting Chart�� 23, 24 Service Error Code Chart �� 25, 26

If You Need Service

Call for Assistance �� 26

Installation Instructions

Standards Compliance ��28 Choosing a Location �� 28, 29 Product Inspection �� 30 Water Heater Installation ��30–33 Venting ��34–45 Water Quality/Supply ��46–50 Gas Supply ��50–55 Electrical Wiring ��55–59 Remote Control Installation �� 58, 59 Insulation Blankets and Installation Precautions ��60 Installation Checklist ��61 Piping for Space Heaters ��62 Recirculation Control �� 63-65 Activating the Water Heater ��66 Operating Instructions ��67 Setting the Water Temperature �� 68–70 High-Altitude Dip Switch Adjustments��70, 71 Water Saving Control Option ��72, 73 Maintenance Notice Option ��74, 75 Parts Ordering ��76, 77 Warranty Information��79, 80

IMPORTANT SAFETY INFORMATION

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:

DANGER: An imminently hazardous

situation that will result in death or serious injury.

WARNING: A potentially hazardous

situation that can result in death or serious injury and/or damage to property.

WARNINGS:

• This water heater is not suitable for use in manufactured (mobile) homes!

• Improper installation, adjustment, alteration, service, or maintenance can cause death, personal injury, or property damage. Follow the instructions in this manual.

READ ALL INSTRUCTIONS BEFORE USING.

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 death or serious bodily injury� 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�

CAUTION: A potentially hazardous situation

that may result in minor or moderate injury.

WARNING:

California Proposition 65

This product contains chemicals known to the state

NOTICE: Attention is called to observe a

specified procedure or maintain a specific condition.

of California to cause cancer, birth defects, or other reproductive harm.

IMPORTANT SAFETY INFORMATION

Water Heater Venting Safety

DANGER:

• Failure to install and properly vent the water heater to the outdoors as outlined in the “Venting” section of the Installation Instructions in this manual will result in death from fire, explosion, or asphyxiation from carbon monoxide. NEVER operate this water heater unless it is properly vented and has an adequate air supply for proper operation.

• Be sure to inspect the vent terminal, the air intake, and the coaxial vent system on the water heater 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 coaxial vent system inspection.

WARNINGS:

• Gasoline and other flammable liquids, materials, and vapors (including paint thinners, solvents, and adhesives) are extremely dangerous. DO NOT handle, use, or store gasoline or other flammable or combustible materials anywhere 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 death, bodily injury, or property damage.

• Combustible construction refers to adjacent walls and ceilings and should not be confused with combustible or flammable products and materials. Combustible materials, such as clothing, cleaning materials, or flammable liquids, should never be stored in the vicinity of this or any gas appliance. Fire or explosion can occur causing death, personal injury, and/or product damage. See page 29 for clearances to combustible materials.

• Follow vent manufacturer’s instructions for venting installation, including additional clearances from combustibles, to avoid conditions that can lead to death, personal injury, and/or property damage.

• Use tankless water heater manufacturerapproved Category III Stainless Steel vent material only. No other vent material is permitted.

• Moisture in the flue gas will condense as it leaves the vent terminal. In cold weather this condensate can freeze on the exterior wall, under the eaves, and on surrounding objects. Some discoloration to the exterior of the building is to be expected. However, improper location or installation can result in severe damage to the structure or exterior finish of the building.

DANGER

FLAMMABLES

Vapors from flammable liquids will explode and catch fire causing death or severe burns.

Do not use or store flammable products such as gasoline, solvents or adhesives in the same room or area near the water heater.

Keep flammable products:

1. far away from heater,

2. in approved containers,

3. tightly closed and

4. out of children's reach.

Installation: Do not install water heater where flammable products will be stored or used unless the main burner flame is at least

Read and follow water heater warnings and instructions. If owners manual is missing, contact the retailer or manufacturer.

• For multiple-unit installation, a minimum distance between vent terminations must be maintained to prevent recirculation of vent gases. Maintain a center-to-center distance between vent terminations of 19 in. (48 cm) for two-unit installation. Maintain a center-to-center distance between vent terminations of 21 in. (53 cm) for installation of three or more units.

Flammable Vapors

Water heater has a main burner flame. The main burner flame:

1. which can come on at any time and

2. will ignite flammable vapors.

Vapors:

1. cannot be seen,

2. are heavier than air,

3. go a long way on the floor and

4. can be carried from other rooms to the main burner flame by air currents.

18" above the floor. This will reduce, but not eliminate, the risk of vapors being ignited by the main burner flame.

CAUTIONS:

• Ensure that the appliance vent is securely attached to the water heater collar.

• Condensate must drain away from the water heater and should not be allowed to drain back into any part of the vent system.

• DO NOT operate without the condensate trap connected to the vent and routed to the proper drain.

• Follow the vent manufacturer’s installation instructions because the design might vary from manufacturer to manufacturer.

Safety

IMPORTANT SAFETY INFORMATION

Water Supply Safety

DANGERS:

• WATER TEMPERATURE

Safety

SETTINGS – Safety and energy conservation are factors to be considered when selecting the water temperature setting of a water heater’s remote control. Water temperatures above 125°F (52°C) can cause death or severe burns from scalding. Be sure to read and follow the warnings outlined on the pictured label.

• There is a hot water scald potential if the water temperature is set too high. Households with small children, the disabled, or elderly persons may require a 120°F (49°C) or lower temperature setting to prevent contact with “HOT” water.

• Before manually operating the relief valve, make certain no one will be exposed to the danger of the hot water released by the valve. The water may be hot enough to create a scald hazard. The water should be released into a suitable drain to prevent injury or property damage.

• Failure to perform the recommended Routine Preventive Maintenance can harm the proper operation of this water heater, which can cause carbon monoxide dangers, excessive hot water temperatures, and other potentially hazardous conditions.

Water temperature over 125° can instantly or

See instruction manual before

setting temperature at water

heater.

Feel water before bathing or

showering.

Temperature limiting valves are

available, see manual.

WARNINGS:

• IMPORTANT: DO NOT apply heat to the HOT or COLD water connections. If sweat connections are used, sweat tubing to adapter before fitting adapter to the water connections on heater. Any heat applied to the water supply fittings will permanently damage the internal components of the water heater.

• In case the pipe insulation is not rated for the appropriate weather conditions, install electric heat tracing or equivalent to prevent freezing of the pipes. DO NOT insulate or block the drain valve on the hot outlet fitting. If the pipes are allowed to freeze, the water heater and the pipes may malfunction or leak due to freezing water.

• Failure to drain the water heater as described on page 20 can cause serious personal injuries from scalding and/or damage the water heater.

D ANGER

HOT

BURN

cause severe burns

death from scalds.

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

Time/Temperature Relationship in Scalds

Water Time to Produce Temperature a Serious Burn

120°F (49°C) More than 5 minutes 125°F (52°C) 1 1/2 to 2 minutes 130°F (54°C) About 30 seconds 135°F (57°C) About 10 seconds 140°F (60°C) Less than 5 seconds 145°F (63°C) Less than 3 seconds 150°F (66°C) About 1 1/2 seconds 155°F (68°C) About 1 second

Table courtesy of Shriners Burn Institute

Temperature Conversion Chart °F/°C

85 100 102 104 106 108 110 112 °F

29 38 39 40 41 42 43 44 °C

114 116 118 120 125 130 140 °F

46 47 48 49 52 54 60 °C

CAUTIONS:

• This water heater must only be used with the following water supply system conditions:

– With clean, potable water

free of corrosive chemicals, sand, dirt, or other contaminants.

– With inlet water

temperatures above 32°F (0°C), but not exceeding 120°F (49°C).

– DO NOT reverse the hot and

cold water connections. The water heater will not operate.

• Even when drained properly, a small amount of water will remain in the water heater. In cold weather conditions, this water can freeze. If this happens, allow the defrost protection on the heater at least 30 minutes to melt the frozen water or the water heater may not work properly.

IMPORTANT SAFETY INFORMATION

Natural Gas and Liqueﬁed Petroleum Safety

DANGERS:

• Never attempt to convert the water heater from natural gas to LP. The water heater should only use the fuel type in accordance with listing on data plate—natural gas for natural gas units and LP for LP units. Any other fuel usage will result in death or serious personal injury from fire and/ or explosion. This water heater is not certified for any other fuel type.

• Both natural gas and propane (LP) 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 natural gas or LP, 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 using LP gas are different from natural gas models. A natural gas water heater will not function safely on LP and vice versa.

• LP water heaters 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.

• LP 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 at a connection indicates a leak that must be corrected. When smelling to detect a gas leak, be sure to also sniff near the floor.

• 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.

• Combustible materials, such as clothing, cleaning materials, or flammable liquids, must not be placed in the vicinity of the water heater.

• If a gas leak is present or suspected:

– DO NOT attempt to find the cause yourself.

WARNINGS:

• The installation of gas piping must conform to

local utility company requirements and/or in the absence of local codes, use the latest edition of National Fuel Gas Code (NFGC), ANSI Z223.1/ NFPA 54, or CAN/CSA B149.1, Natural Gas and Propane Installation Code.

• If inlet gas pressure is out of allowable range [4.0” w.c. (1.0kPa) – 10.5” w.c. (2.6kPa)] for Natural Gas, or [8.0” w.c. (2.0kPa) – 13.0” w.c. (3.2kPa)] for LP gas, a gas pressure regulator must be installed to maintain the allowable inlet gas pressure.

• Should overheating occur or the gas supply fail to shut off, turn off the manual gas control valve to the water heater.

CAUTIONS:

• DO NOT attempt repair of electrical wiring, gas piping, remote control, burners, vent connectors, or other safety devices. Refer repairs to qualified service personnel.

• Turn off the manual gas shut-off valve if the water heater has been subjected to overheating, fire, flood, physical damage, or if the gas supply fails to shut off.

• DO NOT turn on the water heater unless the water and gas supplies are completely opened.

NOTICE:

• The factory setting allows operating temperatures between 100°F (38°C) and 120°F (49°C). Temperatures of 85°F (29°C) and up to 140°F (60°C) can be achieved with the MAIN (UMC-117) remote control. Temperatures of 85°F (29°C) can be achieved with the Bath (USC-117 or USC2-117) remote control. Only qualified service personnel should perform this adjustment. Only factory-authorized remote control(s) should be used.

Safety

– Never use an open flame to test for gas

leaks. The gas can ignite resulting in death, personal injury, or property damage.

– Follow the steps listed under “What to Do If

You Smell Gas” found on the front cover of this manual.

IMPORTANT SAFETY INFORMATION

Before operating this water 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 unsafe operation of the water heater, resulting in death, personal injury, or property damage. Should you have any problems reading or following the

Safety

instructions in this manual, STOP and get help from a qualified service technician.

FOR YOUR SAFETY READ BEFORE OPERATING

WARNING

causing property damage, personal injury or loss of life.

: If you do not follow these instructions exactly, a fire or explosion may result

OPERATING INSTRUCTIONS

1.STOP! Read the safety information above on this label.

2.Turn off all electric power to the appliance.

3.Do not attempt to light the burner by hand.

4.Turn the Gas Shutoff Valve located on the outside of the unit clockwise to the "OFF" position.

5.Wait five (5) minutes to clear out any gas. If you then smell gas, STOP! Follow "B" in the safety information above on this label. If you don't smell gas, go to the next step.

6.Turn the Gas Shutoff Valve located on the outside of the unit counterclockwise to the "ON" position.

7.Turn on all electric power to the appliance.

8.If the appliance will not operate, follow the instructions "To Turn Off Gas To Appliance" and call your service technician or gas supplier.

GAS SHUTOFF

VALV E

OPEN CLOSE

TO TURN OFF GAS TO APPLIANCE

1.Turn off all electric power to the appliance if service is to be performed.

2.Turn the Gas Shutoff Valve located on the outside of the unit clockwise to the "OFF" position.

Electrical Safety

IMPORTANT SAFETY INFORMATION

DANGER:

• Shock Hazard – Make sure the electrical power

to the water heater is off to avoid electric shock that will result in death or serious personal injury.

WARNINGS:

• For your safety, the information in this manual must be followed to minimize the risk of fire, explosion, or electric shock that can result in death, personal injury, and/or property damage.

• Field wiring connections and electrical grounding must comply with local codes or, in the absence of local codes, with the latest edition of the National Electrical Code, ANSI/ NFPA 70, or in Canada, Canadian Electrical Code, CAN/CSA C22.1, Part 1.

CAUTIONS:

• Label all wires prior to disconnecting for service. Wiring errors can cause dangerous and improper operation. Verify correct operation after servicing.

• For your safety, burner inspection and cleaning should be performed only by qualified service personnel.

• Make certain the power to the water heater is OFF before removing the unit cover panel. Exposed electrical components and moving parts can cause personal injuries.

• For your safety, DO NOT attempt repair of electrical wiring, gas piping, remote control, burners, vent connectors, or other safety devices. Refer repairs to qualified service personnel.

FOR INSTALLATIONS IN THE STATE OF CALIFORNIA

California law requires that water heaters must be braced, anchored, or strapped to resist falling or horizontal displacement due to earthquake motions. For water heaters up to 52-gallon capacity, a brochure with generic earthquake bracing instructions can be obtained from: Office of the State Architect, 1102 Q Street, Suite 5100, Sacramento, CA 95814, or you may call 916-445-8100 or ask a water heater dealer.

However, applicable local codes shall govern installation. For residential water heaters of a capacity greater than 52 gallons or tankless-style, consult the local building jurisdiction code for acceptable bracing procedures.

Safety

IMPORTANT SAFETY INFORMATION

General Installation and Maintenance Safety

WARNINGS:

• This water heater must be installed in

SafetyProduct Information

accordance with these instructions, local codes, utility company requirements and/or in the absence of local codes, use the latest edition of the American National Standard/ National Fuel Gas Code (NFGC), ANSI Z223.1 and National Fire Protection Association, NFPA 54, or in Canada, CAN/CSA B149.1, Natural Gas and Propane Installation Code, and the latest edition of the National Electrical Code, ANSI/NFPA 70, or in Canada, Canadian Electrical Code, CAN/CSA C22.1, Part 1.

• If local codes require the application of external insulation blanket kits, carefully follow the manufacturer’s installation instructions included with the kit. Only use blanket kits that are approved for use with your water heater.

• For your safety, DO NOT attempt to disassemble this water heater for any reason. Improper adjustments, alterations, service, or maintenance can cause death, personal injury, or property damage.

SAFETY PRECAUTIONS:

• Read this manual entirely before installing and/ or operating the water heater.

• Use this water heater only for its intended purpose as described in this Use and Care Manual.

• Have the installer show you the location of the gas shut-off valve and how to shut it off if necessary. Turn off the manual shut-off valve if the water heater has been subjected to overheating, fire, flood, physical damage, or if the gas supply fails to shut off.

• Be sure your water heater is properly installed in accordance with local codes and the provided installation instructions.

• DO NOT attempt to repair or replace any part of your water heater unless it is specifically recommended in this manual. All other servicing should be referred to a qualified service technician.

SAVE THESE

INSTRUCTIONS

PRODUCT INFORMATION

For Your Records

Write down and save the following product information along with the original sales slip and/ or cancelled check.The model and serial numbers can be found on the top label on the right side of the water heater.

MODEL NUMBER:

SERIAL NUMBER:

DATE OF INSTALLATION:

INSTALLING COMPANY/PHONE NUMBER:

PLUMBING CONTRACTOR/PHONE NUMBER:

See page 26 for additional service information.

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 Chart on pages 23 and 24� Always refer to this chart before calling for service� Referring to this chart before calling may answer your question(s) and eliminate the need for service�

Preoperating Checklist

Is the main gas valve to the water heater turned on?

Is the fuse in place or is the breaker turned on?

Does the water heater’s electronic ignition light?

Is the water temperature set to a safe temperature?

Is the water heater connected to a floor drain?

Is the water heater properly vented to the outside?

Is the water heater installed in a safe location away from flammable materials and/or freezing conditions?

1315/16"

(354 mm)

19/16"

(40 mm)

/4"

(45 mm)

/16"

(131 mm)

/8"

(143 mm)

55/8"

(143 mm)

/2"

(140 mm)

/16"

/8"

(86 mm)

35/8"

(92 mm)

/2"

(343 mm)

/4"

(172 mm)

/2"

(241 mm)

Speciﬁcations – Direct-Vent Models

1315/16"

(354 mm)

81/2"

(216 mm)

/16"

(40 mm)

/4"

(45 mm)

/8"

(143 mm)

55/8"

(143 mm)

/16"

(106 mm)

/8"

(73 mm)

/16"

(53 mm)

/4"

(58 mm)

/2"

(343 mm)

(73 mm)

2913/16"

(757 mm)

/8"

(651 mm)

PRODUCT INFORMATION

/2"

(140 mm)

(131 mm)

19/16"

(40 mm)

(343 mm)

/16"

1315/16"

(354 mm)

/4"

(172 mm)

/4"

(45 mm)

/2"

Product Information

Speciﬁcations – Outdoor Models

2613/16"

(663 mm)

/4"

(603 mm)

(106 mm)

(40 mm)

/16"

33/8"

(86 mm)

/16"

(143 mm)

/8"

/2"

(343 mm)

1315/16"

(354 mm)

55/8"

(143 mm)

35/8"

(92 mm)

/4"

(45 mm)

81/2"

(216 mm)

21/16"

(53 mm)

/8"

(143 mm)

/4"

/8"

55/8"

(143 mm)

(58 mm)

PRODUCT INFORMATION

Speciﬁcations

Product Information

The following product information can be found from the rating label on this water heater�

A� Model Number B� Serial Number C� Data Bar Code D� Heater Type E� Installation Type F� Type of Gas G� Max� Inlet Gas Pressure H� Min� Inlet Gas Pressure J� Recovery Rating K� Max� BTU Input Rating L� Min� BTU Input Rating M� Manifold Gas Pressure N� Certification Stamp P� Alternate Approval Stamp Q� Clearances

English Rating Label

English/French Rating Label

General Descriptions

Typical Direct-Vent Water Heater

PRODUCT INFORMATION

(Venting Required)

Condensate

Collector

Remote Control

With Power Switch

Product Information

To Hot Water

Faucet(s)

Drain Valve

Power

Supply

Cord

Union

Relief

Valve

Service

Valve

Water

Filter

Cold Water Supply

Shut-Off Valve

To Drain: Dispose of condensate in accordance with local codes.

Manual Gas

Shut-Off Valve

Union

Sediment Trap (in accordance with the local gas authority)

Cap

Manual Gas Supply Line

Shut-Off Valve

Discharge Line

(To Suitable Drain)

(150 mm)

Air Gap

PRODUCT INFORMATION

Typical Outdoor Water Heater

(No Venting Required)

This water heater is for OUTDOOR installation only.

DANGER:

DO NOT install this water heater indoors or in a confined area. It is designed for outdoor installation only. Any other type of installation will result in death or serious personal injury.

Product Information

Flue

Terminal

Remote Control

With Power Switch

(Installed Indoor)

To Hot Water

Faucet(s)

Drain Valve

Hard-Wire

Power Supply

(not supplied)

Cord

Union

Relief Valve

Service

Valve

Air Inlet

Cold Water Supply

Water Filter

Shut-Off Valve

Manual Gas

Shut-Off Valve

Union

Sediment Trap (in accordance with the local gas authority)

Cap

Manual Gas Supply Line

Shut-Off Valve

(150 mm)

Air Gap

Discharge Line

(To Suitable Drain)

Safety Precautions

USING YOUR WATER HEATER

WARNING:

• Flammable vapors can be drawn by air currents from surrounding areas to the water heater. Vapors can ignite causing death, personal injury, or product damage.

• DO NOT store or use flammable or combustible materials (gasoline, paint thinner, adhesives, newspapers, rags, mops, etc.) in the vicinity of the water heater or any other gas appliance. If they must be used, open doors and windows for ventilation, and shut off all gas-burning appliances, including their pilot lights.

• DO turn off manual gas shut-off valve if water heater has been subjected to overheating, fire, flood, physical damage, or if the gas supply fails to shut off.

• DO NOT turn on water heater unless water and gas supplies are completely opened.

• If there is any difficulty in understanding or following the operating and care instructions in this manual, it is recommended that you contact a qualified service technician to perform the work.

Setting the Water Temperature

DANGER:

Water temperatures above 125°F (52°C) will result in death and/or severe burns from scalding.

Safety and energy conservation are factors to be considered when selecting the water temperature setting. The temperature of the water in the water heater can be regulated by setting the temperature on the front of the remote control. Be sure to read and follow the warnings outlined on the pictured label.

The remote control has been preset and shipped at the recommended temperature setting.

Safety factors should be considered whenever altering the water temperature setting. The chart below may be used as a guide in determining the proper water temperature for your home.

D ANGER

HOT

Use Instructions

BURN

Time/Temperature Relationship in Scalds

Water Time to Produce Temperature a Serious Burn

Table courtesy of Shriners Burn Institute

Water temperature over 125° can

cause severe burns

instantly or

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.

death from scalds.

USING YOUR WATER HEATER

Setting the Water Temperature (cont.)

Maximum water temperature occurs while the water heater burner is on. To determine the water temperature:

Turn on the hot water faucet and place a thermometer in the water stream.

NOTICE:

Water temperature at the faucet may vary depending on the season and the length of pipe from the water heater.

The remote control temperature range is between 100°F (38°C) and 120°F (49°C)� To adjust the temperature to a desired setting, press the UP or DOWN adjustment button on the face of the remote control� The new temperature set point will show on the LED display�

Use Instructions

In-Use Indicator

(Lit during operation)

Priority

Indicator

NOTICE:

The temperature set point on the standard remote control cannot be increased above 112°F (44°C) when a hot water faucet is in the open position. To achieve temperatures above 120°F (49°C) or below 85°F (29°C), contact a qualified service technician. Only factoryauthorized remote control(s) should be used.

The water heater may not operate with a small water flow� Increase the water flow and recheck� If it still does not operate with the hot water faucet completely open, increase the temperature setting on the remote control�

Water Heater Facts

DANGER:

Water temperatures above 125°F (52°C) will result in death and/or severe burns from scalding.

• The hottest-temperature water will be at the faucet

closest to the water heater�

• Always remember to test the water temperature with

your hand before use�

• Always supervise young children or others who are

incapacitated�

• The water heater is equipped with a device that will

shut off the gas supply to the burner if the water heater exceeds normal operating temperatures�

• Any water heater that has been subjected to fire, flood,

physical damage, or been under water should be turned off at the manual gas shut-off valve and not used until it has been checked by qualified service personnel�

Temperature

Adjustment

Buttons

LED Temperature and

Error Code Display

Power ON/OFF

Button and

Indicator

CARING FOR YOUR WATER HEATER

Water Heater Inspections

Venting System (Direct Vent Only)

The venting system should be inspected annually by a qualified service technician to ensure all of the vent sections are secure and airtight�

WARNING:

DO NOT operate the water heater if the vent system shows signs of leaking exhaust. Leaking exhaust could lead to death, personal injury, and/or product failure.

Outdoor models

Check the air intake and vent outlet for blockage and/or

debris�

Condensate Trap (Direct Vent Only)

CAUTION:

DO NOT operate without the condensate trap connected to the vent and routed to the proper drain. It could cause the system to malfunction or fail.

On a regular basis, inspect the condensate trap to ensure there is enough water in the trap and the condensate is draining properly�

Use Instructions

Ensure that condensate is disposed of per local codes and regulations�

Burner

Sight

Glass

CARING FOR YOUR WATER HEATER

Water Heater Inspections (cont.)

Burner

It is recommended that the burner be inspected annually by a qualified service technician�

DANGER:

Shock Hazard – Removing the front cover panel exposes you to live electricity. Electric shock will cause death or serious personal injury.

While the water heater is operating, inspect the main burner flames through the burner sight glass� The flames should be blue when the main burner is firing�

NOTICE:

If the flames are not blue or you observe unusual

Remove 4 screws and the unit cover panel�

burner operation, shut off the water heater and contact a qualified service technician.

Turn on a hot water faucet�

Care Instructions

Turn off the hot water faucet and reinstall the unit cover panel�

Care and Cleaning

Drain Valve

Cold Water Supply

Shut-Off Valve

CARING FOR YOUR WATER HEATER

DANGER:

Shock Hazard – Make certain power to the water heater is OFF before removing protective cover for any reason. Electric shock will cause death or serious personal injury.

WARNING:

Combustible materials, such as clothing, cleaning materials, or flammable liquids, must not be placed against or next to the water heater. Fire or explosion can occur causing death, personal injury, and/or product damage.

All care and cleaning to and around the water heater should only be performed with the water heater turned off and the electrical power supply disconnected�

Vacuum around the water heater to remove any dust, dirt,

and/or lint buildup�

NOTICE:

The air intake requires a minimum of 12 in. (30 cm) of clearance between the air intake opening and any obstruction.

Clean the water filter monthly, as described below and on page 18�

Water Filter Cleaning

Turn off the water heater and disconnect the electrical power supply�

Clean the water heater and the remote control with a damp soft cloth and mild detergent� Gently wipe and completely dry all surfaces�

Outdoor models

Check the air intake and vent outlet for blockage and/or debris�

Turn off the water supply to the water heater�

Care Instructions

Drain the water heater� See page 20�

CARING FOR YOUR WATER HEATER

Care and Cleaning (cont.)

CAUTION:

DO NOT tap or force the filter during removal. This can deform and/or damage the filter.

Unscrew the water filter from the base of the cold water inlet line and carefully slide it out of the line�

CAUTION:

DO NOT overtighten the water filter. Overtightening can deform and/or damage the filter.

Replace the filter in the cold water inlet line and tighten until it is snug�

Clean the water filter under running water� To remove severe sediment and dirt, use a soft brush�

Care Instructions

Turn on the water supply, reconnect the electrical supply, and turn on the water heater�

CARING FOR YOUR WATER HEATER

Relief Valve

Preventive Maintenance

WARNING:

Failure to perform routine preventive maintenance can prevent the water heater from operating properly. Improper operation can cause carbon monoxide dangers, excessive water temperatures, and other potentially hazardous conditions resulting in death, personal injury, and/or product damage.

Properly maintaining your water heater will ensure dependable, trouble-free service�

User Preventive Maintenance

Establish and follow a routine preventive maintenance program� The following suggested items should be included in your program�

Monthly check and clean the water filter� See “Water Filter Cleaning” on page 17�

WARNING:

Hot water is released during manual operation of the relief valve. Make sure all people and animals are clear from the area before performing this check to prevent death, personal injury, and/or property damage from hot drain water.

NOTICE:

If the pressure relief valve on the hot water heater discharges periodically, this may indicate a problem in the water system. Contact the water supplier or a plumbing contractor to correct the problem. DO NOT plug the relief valve outlet.

• Inspect and keep the area around the water

heater clear and free of flammable materials, such as gasoline and other flammable vapors and liquids.

• Visually inspect the water heater for damage and/

or denting. If present, contact a service personnel to verify proper operation.

• Check for abnormal sound during normal

operation (e.g., hissing or banging noises). Contact a qualified service technician or plumbing contractor.

• Check all gas and water pipes for leaks. See

page 54.

NOTICE:

– DO NOT operate the water heater if you feel

something is wrong with the unit.

– DO NOT allow children to operate or handle the unit.

• After inspections, maintenance, and/or cleaning, ensure

proper operation by turning on a hot water faucet�

Care Instructions

Professional Preventive Maintenance

It is recommended that a periodic inspection of the water heater burner, relief valve, air intake filter, water filter, and venting system be made by a qualified service technician�

Annually check the operation of the pressure-relief valve� Lifting the lever handle on the pressure-relief valve opens the valve to flush hot water through the discharge line to the drain� After several gallons have drained, release the lever handle to close the valve and stop draining�

WARNING:

Certain water conditions can damage the water heater and may cause defects, malfunctions or failures of the water heater that are not covered by the limited warranty. See page 46 for more detail.

Cold Water Supply

Shut-Off Valve

CARING FOR YOUR WATER HEATER

Draining the Water Heater

WARNING:

Failure to follow these draining instructions can cause serious personal injury from scalding and/or product damage.

Close the water shut-off valve.

Turn off the water heater by pressing the POWER ON/OFF button on the control panel.

Close the gas shut-off valve(s).

At least 10 seconds after Step 1, unplug the water

Care Instructions

heater or disconnect the power supply at the circuit breaker box.

Using a suitable container to catch the water, remove the water filter from the base of the cold water inlet line.

Connect a garden hose to the drain valve in the hot water outlet line and place the other end in a suitable drain. Open the drain valve until all the water has drained from the water heater. Leave water heater as is until placed back in service.

Open all hot water faucets. Run the water until it is COLD; then shut off the faucet.

CARING FOR YOUR WATER HEATER

Draining the Water Heater (cont.)

CAUTION:

Even when drained properly, a small amount of water will remain in the water heater. In cold weather conditions, this water can freeze. If this happens, allow the defrost protection on the water heater at least 30 minutes to melt the frozen water. The water heater will not work properly until this water is thawed.

To put the water heater back in service:

Open all hot water faucets and let run until all air has been purged from the lines.

Disconnect drain hose. Make sure the drain valve is closed.

Reinstall the water filter in the base of the cold water inlet line.

Open the water shut-off valve.

Plug in the power cord or reconnect the power supply at the circuit breaker box.

Open the gas shut-off valve(s).

Care Instructions

Press the POWER ON/OFF button on the control panel to restart the unit.

Cold Water

Service Valve

Hot Water

Service Valve

Hot Water

Service Valve

Pressure

Relief Valve

Relief

Valve

Water Outlet

Water

Inlet

Water

Inlet

Drain

CARING FOR YOUR WATER HEATER

Draining the Water Heater (cont.)

Preferred Drain Method

Isolator valve kits may be purchased from the manufacturer, distributor, or place of purchase� The kits include two full port isolation valves to be used in the inlet and outlet water lines� It is highly recommended to install isolator valve kits because these kits provide a means for full diagnostic testing and ease of system flushing�

Freeze Protection

WARNING:

Failure to drain the water heater can cause serious personal injury from scalding and/or product damage.

Whenever the water heater may be exposed to freezing conditions, make sure to completely drain the water from the unit� See page 20�

Freezing conditions come from the ventilation system on direct-vent models and from exposure to cold air on outdoor models�

All of these water heaters are equipped with a freeze protection electric heater� This heater prevents freezing inside the water heater down to an ambient temperature of approximately -30°F (-34°C)� These temperatures are all based on temperatures without wind�

The heater only protects the internal components of the water heater�

NOTICE:

Unplugging or disconnecting the power supply to the water heater will also disconnect the power to

Care Instructions

the heater.

External piping and valves require additional freeze protection� One method is to wrap insulation around the piping and valves�

Another method is to turn on a hot water faucet and leave a small amount of water running at a faucet� This will protect the water heater, piping, and valves from freezing�

Running Water Freeze Protection

Turn off the water heater by pressing the POWER ON/OFF button on the control panel�

Close the gas shut-off valve(s)�

Open a hot water faucet slightly until the water stream is approximately 1/8 in� (0�3 cm)� Be sure to check the flow periodically�

CARING FOR YOUR WATER HEATER

Vacation and Extended Shutdown

WARNING:

Failure to drain the water heater can cause serious personal injury from scalding and/or product damage.

If the water heater is to remain idle for an extended period of time, the power and water to the heater should be turned off�

The water heater and piping should be drained if they might be subjected to freezing temperatures� See “Freeze Protection” section on page 22�

After an extended shutdown, the water heater’s operation and controls should be checked by a qualified service technician�

Troubleshooting Chart

The information in the following troubleshooting chart may help you diagnose and/or fix a problem you may be experiencing� Please review this chart before calling for service assistance�

DANGER:

Shock Hazard – Make certain power to the water heater is OFF before removing protective cover for any reason. Electric shock will cause death or serious personal injury.

Problem Possible Cause Solution

Not enough or no hot water�

9 1143

1� Unit is not ON� 1� Turn on the unit by pressing the POWER

2� Water shut-off valve is not completely

opened�

3� Hot water faucet is not completely opened� 3� Open hot water faucet completely� (The

4� Water piping is frozen� 4� Allow piping to thaw�

5� Electrical power is disconnected or water

supply is shut off�

6� The temperature may be set too low� 6� Increase the temperature setting�

7� Mixing valve malfunctions (if

applicable)�

8� Error code displayed on the remote control� 8� See “Service Error Code Chart” on

9� Not enough water demand� 9� Increase the hot water ﬂow at the

10� Water ﬁlter is clogged or dirty� 10� Clean the water ﬁlter� (See page 17�)

11� Fixture aerator is clogged or dirty� 11� Clean the aerator�

12� Scale buildup in the heat exchanger� 12� Check for error code� If required,

13� Hot and cold water lines reversed� 13� Reverse the water lines�

WARNING:

For Your Safety, DO NOT attempt repair of electrical wiring, gas piping remote control, burners, vent connectors, or other safety devices. Refer repairs to a qualified service technician.

ON/OFF button�

2� Check shut-off valve and open completely�

main burner goes off when incoming water volume is inadequate�)

5a� Plug in the power cord or reconnect

the power supply at the circuit breaker box�

5b� Completely open the water supply valve�

(Inadequate water volume will cause the main burner to turn off�)

7� Check and replace the mixing valve�

page 25� If required, contact a qualiﬁed service technician�

faucet�

contact a qualiﬁed service technician�

Care Instructions

CARING FOR YOUR WATER HEATER

Troubleshooting Chart (cont.)

Problem Possible Cause Solution

Water not hot enough�

1� The temperature may be set too low� 1� Increase the temperature setting at

2� The gas valve is not completely opened� 2� Check and completely open the gas valve�

the remote control�

Water too hot�

3� Gas supply pressure is low� 3� Contact your gas utility company or gas

4� Bleed-over in one of the hot water

ﬁxtures�

contractor to verify the gas meter and gas piping size�

4� Contact a dealer or a qualiﬁed service

technician�

1� Temperature is set too high� 1� Decrease the temperature setting at

2� Water shut-off valve is not completely

opened�

the remote control�

2� Check and completely open the water shut-

off valve�

3� Small amount of water has been heated� 3� Increase the hot water ﬂow at the

faucet to allow more water to ﬂow through the water heater�

Fan continues to rotate after the hot water

Care Instructions

faucet is closed�

The post-purge cycle clears ﬂue gases� Normal operation�

CARING FOR YOUR WATER HEATER

Service Error Code Chart

Your water heater has an electronic diagnostic system built into it. When the water heater finds a problem, it displays an error code in the LED display on the remote control. The following chart lists the error codes along with their possible problem and solution. Using this chart may help you diagnose and/or fix a problem you may be experiencing. Please refer to this chart before calling for service assistance.

DANGER:

Shock Hazard – Make certain power to the water heater is OFF before removing protective cover for any reason. Electric shock will cause death or serious personal injury.

WARNING:

For Your Safety, DO NOT attempt repair of electrical wiring, gas piping, remote control, burners, vent connectors, or other safety devices. Refer repairs to a qualified service technician.

When an error code is displayed:

Turn off all the hot water faucets.

Wait about 5 minutes; then restart the water heater by pressing the POWER ON/OFF button.

Turn on a hot water faucet and recheck the remote control display.

If the error code remains in the display:

1� Turn off the hot water faucet� 2� Turn off the water heater� 3� Unplug the water heater from power, wait about 30

seconds and plug back in�

4� Follow the error code chart information� 5� Restart the water heater, turn on a hot water faucet,

and recheck the remote control display�

If the error code is still shown:

1� Turn off the hot water faucet� 2� Turn off the water heater� 3� Make note of the displayed error code and call for

service assistance� See “Call for Assistance” section on page 26�

Care Instructions

Turn off the water heater by pressing the POWER ON/OFF button on the remote control.

NOTICE:

If the displayed error code is not listed in the chart, immediately turn off the water heater and call for service assistance.

CARING FOR YOUR WATER HEATER

Service Error Code Chart (cont.)

Error Code Possible Cause Solution

61 or 99

Water heater has buildup of lime deposits� Contact a dealer or qualiﬁed service technician�

Air intake or vent exhaust opening may be blocked�

The vent pipes on the vent termination may not be connected properly�

The gas shut-off valve is not fully opened� Check shut-off valve and open completely�

Gas service has been interrupted� Contact your gas utility company�

LP gas is running low (LP models only)� Reﬁll or replace your LP gas container�

If this code is still displayed after taking the numbered steps above�

Water heater is overheating� Contact a dealer or qualiﬁed service technician�

The heat exchanger is too hot� Check for blockage in the vent� Contact a dealer

Faulty inlet thermistor� Contact a dealer or qualiﬁed service technician�

Faulty outlet thermistor� Contact a dealer or qualiﬁed service technician�

Faulty blower motor� Contact a dealer or qualiﬁed service technician�

Faulty water ﬂow solenoid� Contact a dealer or qualiﬁed service technician�

Not enough water ﬂow to operate the unit� Increase the water ﬂow from the ﬁxtures�

Reminder of ﬂushing the heat exchanger and/or replacing the water treatment ﬁlter�

Remove any blockage� (Air intake requires 12 in� [30 cm] of clearance�)

Contact a dealer or qualiﬁed service technician�

or qualiﬁed service technician�

Contact a dealer or qualiﬁed service technician�

IF YOU NEED SERVICE

Call for Assistance

1. All questions, adjustments, repairs, and/or

Care Instructions

routine maintenance should be directed to your installer, plumbing contractor, or licensed service agent. If your contacts have moved or are not available, please refer to the telephone directory, commercial listings, or local utility company for qualified service assistance.

2. If your problem has not been solved to your satisfaction, contact the Rheem National Service Department at the following address:

Rheem National Service Department 1241 Carwood Court Montgomery, Alabama 36117 Phone: 1-866-720-2076

When contacting the manufacturer, the following information will be requested:

A. Model and serial number. (See page 8 or the

ratings plate on the side of the water heater.) B. Address where the water heater is located. C. Name and address of installation contractors

(page 8) and all qualified service companies

that have worked on the water heater. D. Original installation date. (See page 8.) E. Dates any service or preventive maintenance

was performed. F. Details of the persisting problem. G. List of businesses that have tried to fix this

problem, along with dates of service.

INSTALLATION

Installation

INSTRUCTIONS

FOR THE CONTRACTOR

INSTALLATION INSTRUCTIONS

Coaxial Vent Pipe

and Air Intake

0" min.

(0 mm)

0" min. (0 mm)

0" min.

(0 mm)

Standards Compliance

General

This water heater must be installed in accordance with these instructions, local codes, and utility company requirements.

In the United States where local codes are not available, use the latest edition of the American National Standard/National Fuel Gas Code. A copy of the Fuel Gas Code can be purchased from either the American Gas Association, 400 North Capitol Street Northwest, Washington, DC

Choosing a Location

WARNING:

Fire Hazard – Combustible construction refers to adjacent walls and ceilings and should not be confused with combustible or flammable products and materials. Combustible materials, such as clothing, cleaning materials, or flammable liquids, must not be placed against or next to the water heater. Fire or explosion could occur causing death, personal injury, and/or product damage.

A gas-fired water heater should never be installed in a space or room where liquids with flammable vapors are used or stored. Such liquids include gasoline, LP gas (butane or propane), paint, adhesives and their thinners, solvents, or removers. Flammable vapors carry long distances from where they are used or stored. The open flame of the water heater’s main burner can ignite these vapors causing an explosion or fire.

NOTICE:

Elevating a gas-fired water heater will reduce but NOT eliminate the possibility of lighting the vapor of flammable liquids which may be improperly stored or accidentally spilled.

20001, as ANSI standard Z223.1, or National Fire Protection Association, 1 Batterymarch Park, MA 02269 as NFPA 54.

In Canada, use the latest edition of the CAN/ CSA B149.1 Natural Gas and Propane Installation Code and the Canadian Electrical Code, CAN/CSA C22.1, Part 1.

NOTICE:

This water heater should not be located in an area where leakage of the heat exchanger or connections will result in damage to the area adjacent to it or to lower floors of the structures. When such areas cannot be avoided, install a suitable catch pan with an adequate drain under the water heater. This drain pan must not restrict the combustion airflow.

The following requirements will ensure a safe installation:

The water heater must be located in an area where it won’t sustain damage from moving vehicles, flooding, etc. If the water heater is installed in a storage garage, the direct ignition system and main burner should be no less than 18 in. (45 cm) above the garage floor.

If the water heater is installed in a repair garage or in a private garage, the direct ignition system and main burner should be no less than 4.5 ft. (1400 mm) above the garage floor.

The water heater should be installed as close as possible to the vent termination. This minimizes the vent length and the number of elbows and joints required for venting.

The water heater should be installed with the proper venting and exhaust materials suitable for Category III venting.

INSTALLATION INSTRUCTIONS

12" min.

(300 mm)

12" min.

(300 mm)

0" min. (0 mm)

12" min.

(300 mm)

1/2" min.

(13 mm)

(0 mm)

Fire Stop Plate

(as required)

0" min.

(0 mm)

Choosing a Location (cont.)

Every vent pipe penetration of a floor or ceiling that is not in a fire-rated shaft requires a fire stop plate.

Failure to install and properly vent the water heater to the outdoors as outlined on pages 34 through 45 can result in unsafe operation.

General

Minimum water heater clearances from combustible and noncombustible construction are as follows: – 1/2 in. (1.3 cm) for sides – 0 in. (0 cm) for rear with support bracket(s) – 12 in. (30 cm) from the bottom, top, and front

Long hot water lines should be insulated to conserve water and energy.

The water heater and water lines should be protected from exposure to freezing temperatures.

• DO NOT install the water heater in areas prohibited by National Fuel Gas Code in U�S� installation or CAN/CSA B149�1 in Canada installation�

• DO NOT install the water heater where it is subject to vibrations�

• DO NOT install the water heater in a recreational vehicle, mobile home, boat, or other watercraft�

NOTICE:

Preferred maintenance clearance is 24 in. (61 cm) from top, bottom, and front of unit.

Minimum clearance around the coaxial vent pipe should meet the specifications listed on the instruction/warning label on the water heater� If no label is found, use the vent manufacturer’s specifications or a minimum clearance of 0 in� (0 cm) around the vent pipe�

• DO NOT install the water heater near vents for heating and cooling� If necessary, maintain a minimum clearance of 4 ft� (1�2 m)�

INSTALLATION INSTRUCTIONS

Product Inspection

General

Visually inspect the water heater for any possible damage.

Check the rating plate on the water heater to make sure the water heater was designed to be used

Remote Control

with the supplied type of gas (natural or LP).

Verify that all included supplied parts are present as shown.

Screws

Washers

Manual Gas Shut-Off Valve

Water Heater Installation

Corrosive Atmosphere

NOTICE:

The water heater should not be installed near an air supply containing halogenated hydrocarbons.

Avoid installing a water heater in any of the following locations: beauty shops, dry-cleaning establishments, photo processing labs, and storage areas for liquid and powdered bleaches or swimming pool chemicals� These locations often contain such halogenated hydrocarbons�

The air supply containing halogenated hydrocarbons is

Remote Control Cable

Pressure Relief Valve

(Some models only)

safe to breathe, but when passed through a gas flame, corrosive elements are released that will shorten the life of any gas-burning appliance�

Propellants from common spray cans or gas leaks from A/C and refrigeration equipment are highly corrosive after passing through a flame�

NOTICE:

The water heater warranty is void when the failure is due to operation in corrosive conditions.

INSTALLATION INSTRUCTIONS

Relief Valve

Service

Valve

Service

Valve

To Hot Water

Faucet(s)

Drain Valve

Wall

Plate

Vent Termination

With Protective

Screen

Water

Filter

Cold Water Supply

Shut-Off Valve

Discharge Line

(To Suitable Drain)

Power

Supply

Cord

Manual Gas Supply Line

Shut-Off Valve

1/4" Per Foot Downward Slope

(recommended)

Manual Gas

Shut-Off Valve

Union

Cap

Sediment Trap

Outside

Wall

90˚

Elbow

(150 mm)

Air Gap

Condensate Trap

To Drain: Dispose of condensate in accordance to local codes.

Union

Built In Condensate Collector

Water Heater Installation (cont.)

NOTICE:

The National Fuel Gas Code (NFGC) and CAN/CSA B149.1 mandate a manual gas shut-off valve. See NFGC/B149.1 for complete instructions. Local codes or plumbing authority requirements may vary from the instructions or diagrams provided and take precedence over these instructions.

Typical Installation of Direct-Vent Water Heater (Venting Required)

General

INSTALLATION INSTRUCTIONS

Cold Water

Service Valve

Hot Water

Service Valve

Hot Water

Service Valve

Pressure

Relief Valve

Relief

Valve

Water Outlet

Water

Inlet

Water

Inlet

Drain

Relief Valve

Service

Valve

Service

Valve

To Hot Water

Faucet(s)

Drain Valve

Cold Water Supply

Shut-Off Valve

Discharge Line

(To Suitable Drain)

Manual Gas Supply Line

Shut-Off Valve

Flue

Terminal

Cap

Union

Sediment Trap

(150 mm)

Air Gap

Manual Gas

Shut-Off Valve

Water

Filter

Hard-Wire

Union

Water Heater Installation (cont.)

General

Typical Installation of Outdoor Water Heater (No Venting Required)

This water heater is for OUTDOOR installation only.

WARNING:

DO NOT install this water heater indoors or in a confined area. It is designed for outdoor installation only. Any other type of installation can result in death, personal injury, and/or damage to the product or property.

Alternate Water Piping Arrangement With Preferred Valve Kit

A valve kit is available and can be used with all models� See “Water Supply Connections” on page 46 for installation instructions�

INSTALLATION INSTRUCTIONS

3/8"–1 1/2" min.

(9.5–38 mm)

Mounting the Water Heater

CAUTION

Reinforcement of the wall is required in case the wall is not strong enough to hold the water heater. Failure to do so could result in personal injury and/ or product damage.

The mounting location for the water heater should allow for easy access and operation�

General

Position the upper mounting bracket and partially install the center mounting screw� The clearance between the screw head and the wall should be about 1/8 in� (0�3 cm)� Hang the upper bracket on the screw�

NOTICE:

The image above may differ in appearance from your water heater.

The water heater is designed to be installed either inside the wall cavity between the wall studs or outside the wall cavity� Either installation requires the water heater to be supported with a wooden support brace between the wall studs or a piece of wood that is equal in size to the water heater and securely attached to the wall studs before the water heater is attached to it� This piece of wood can be installed inside or outside the wall� Use wood screws to secure brackets to the wall� If mounting to a concrete wall, use lag bolts designed for concrete�

Make sure the proper electrical outlet or supply (120 VAC/60 Hz) is available and located near the unit� Directvent models come with a 6-ft� (1�8-m) power cord, while the outdoor models require hard-wiring or the addition of a plug�

Using two mounting screws and washers, secure the lower mounting bracket to the wall� Then, secure the upper mounting bracket to the wall with two mounting screws and washers�

Position the water heater and tighten the adjustment screws to complete the installation� The rear of the water heater can be positioned anywhere between 3/8 in� (0�95 cm) and 1 1/2 in� (3�8 cm) from the wall (indoor model only)�

INSTALLATION INSTRUCTIONS

Venting for Direct-Vent Water Heater

Venting

The water heater must be installed with 3-in�/5-in� (7�6-cm/12�7-cm) diameter UL-approved Category III Coaxial Stainless Steel appliance vent pipe or water heater manufacturer-approved concentric vent pipe�

DANGER:

Failure to install and properly vent the water heater to the outdoors as outlined in this Venting section will result in death or serious personal injury. To avoid the risk of fire, explosion, or asphyxiation from carbon monoxide, NEVER operate the water heater unless it is properly vented and has adequate air supply for proper operation as outlined in this Venting section.

WARNINGS:

• Use 3-in./5-in. (7.6-cm/12.7-cm) UL-approved Category III Stainless Steel vent materials or water heater manufacturer-approved vent material. No other vent material is permitted for use with this appliance.

• Refer to page 29 for required clearances to combustible materials. Improper clearances can cause explosion or fire resulting in death, personal injury, and/or product damage.

Venting Requirements

The installation of venting must comply with national codes, local codes, and the vent manufacturer’s instructions�

The water heater must be vented to the outdoors as described in these instructions� DO NOT vent this water heater through a chimney� It must be vented separately from all other appliances�

All inner coaxial vent components (adapters, pipe, elbows, terminals, etc�) should be water heater manufacturer-approved Stainless Steel Venting Material (e�g�, 444 SS, 316 L)�

Outer casing can be galvanized aluminum or other material�

The specified vent termination must be used� (Refer to page 45 for an example of concentric vent�)

CAUTION:

DO NOT attempt to fabricate or adapt other vent pipe or materials to this venting.

Use the provided screws to connect the coaxial vent pipe together�

Follow the vent manufacturer’s installation instructions� This water heater can be vented horizontally or vertically�

All coaxial vent piping runs must be adequately supported� The maximum recommended unsupported span should be no more than 4 ft� (1�2 m)� Only use support isolation hanging bands� DO NOT use wire to support pipe runs�

Preexisting Venting Notes:

If the water heater is being installed as a replacement for an existing water heater, a thorough inspection of the existing venting and air intake system must be performed prior to any installation work. Verify that the correct materials, vent lengths, and terminal locations as described in this manual have been met. Carefully inspect the entire venting and air intake system for any signs of cracks or fractures, particularly at the joints between elbows or other fittings and the straight runs of vent pipe. Check the system for signs of sagging or other stresses in the joints as a result of misalignment of any components in the system. If any of these conditions are found, they must be corrected in accordance with the venting instructions in this manual before completing the installation and putting the water heater into service.

See page 35 for additional requirements for the Commonwealth of Massachusetts�

INSTALLATION INSTRUCTIONS

In the Commonwealth of Massachusetts

The Commonwealth of Massachusetts requires compliance with regulation 248 CMR 4�00 and 5�00 for installation of throughthe-wall vented gas appliances as follows:

5�08: Modifications to NFPA–54, Chapter 10 (1) Revise NFPA–54 section 10�5�4�2 by adding a second

exception as follows:

Existing chimneys shall be permitted to have their use continued when a gas conversion burner is installed, and shall be equipped with a manual reset device that will automatically shut off the gas to the burner in the event of a sustained backdraft�

(2) Revise 10�8�3 by adding the following additional

requirements:

(a) For all side-wall, horizontally vented, gas-fueled equipment installed in every dwelling, building, or structure used in whole or part for residential purposes, including those owned or operated by the Commonwealth and where the side-wall exhaust vent termination is less than seven (7) feet above finished grade in the area of the venting, including but not limited to decks and porches, the following requirements shall be satisfied�

1� INSTALLATION OF CARBON MONOXIDE DETECTORS� At the time of installation of the side-wall, horizontally vented, gas-fueled equipment, the installing plumber or gasfitter shall observe that a hard-wired carbon monoxide detector with an alarm and battery backup is installed on the floor level where the gas equipment is to be installed� In addition, the installing plumber or gasfitter shall observe that a battery-operated or hard-wired carbon monoxide detector with an alarm is installed on each additional level of the dwelling, building, or structure served by the side-wall, horizontally vented, gas-fueled equipment� It shall be the responsibility of the property owner to secure the services of qualified licensed professionals for the installation of hard-wired carbon monoxide detectors�

a� In the event that the side-wall, horizontally vented, gas-fueled equipment is installed in a crawl space or an attic, the hardwired carbon monoxide detector with alarm and battery backup may be installed on the next adjacent floor level�

b� In the event that the requirements of this subdivision cannot be met at the time of completion of installation, the owner shall have a period of thirty (30) days to comply with the above requirements, provided, however, that during said thirty (30) day period, a battery-operated carbon monoxide detector with an alarm shall be installed�

2� APPROVED CARBON MONOXIDE DETECTORS� Each carbon monoxide detector as required in accordance with the above provisions shall comply with NFPA 720 and be ANSI/UL 2034-listed and IAS-certified�

3� SIGNAGE� A metal or plastic identification plate shall be permanently mounted to the exterior of the building at a minimum height of eight (8) feet above grade directly in line

with the exhaust vent terminal for the horizontally vented, gasfueled heating appliance or equipment� The sign shall read, in print size no less than one-half (1/2) inch in size, “GAS VENT DIRECTLY BELOW� KEEP CLEAR OF ALL OBSTRUCTIONS�”

4� INSPECTION� The state or local gas inspector of the sidewall, horizontally vented, gas-fueled equipment shall not approve the installation unless, upon inspection, the inspector observes carbon monoxide detectors and signage installed in accordance with the provisions of 248 CMR 5�08 (2)(a)(1 through 4)�

(b) EXEMPTIONS: The following equipment is exempt from 248 CMR 5�08 (2)(a)(1 through 4):

1� The equipment listed in Chapter 10 entitled “Equipment Not Required To Be Vented” in the most current edition of NFPA 54 as adopted by the Board, and

2� Product-approved side-wall, horizontally vented, gas-fueled equipment installed in a room or structure separate from the dwelling, building, or structure used in whole or in part for residential purposes�

(c) MANUFACTURER REQUIREMENTS – GAS EQUIPMENT VENTING SYSTEM PROVIDED� When the manufacturer of product-approved side-wall, horizontally vented, gas-fueled equipment provides a venting system design or venting system components with the equipment, the instructions provided by the manufacturer for installation of the equipment and the venting system shall include:

1� Detailed instructions for the installation of the venting system design or the venting system components; and

2� A complete parts list for the venting system design or venting system�

(d) MANUFACTURER REQUIREMENTS – GAS EQUIPMENT VENTING SYSTEM NOT PROVIDED� When the manufacturer of product-approved side-wall, horizontally vented, gas-fueled equipment does not provide the parts for venting the flue gases, but identifies “special venting systems,” the following requirements shall be satisfied by the manufacturer:

1� The referenced “special venting systems” instructions shall be included with the appliance or equipment installation instructions, and

2� The “special venting systems” shall be product-approved by the Board, and the instructions for that system shall include a parts list and detailed installation instructions�

(e) A copy of all installation instructions for all productapproved side-wall, horizontally vented, gas-fueled equipment, all venting instructions, all parts lists for venting instructions, and/or all venting design instructions shall remain with the appliance or equipment at the completion of the installation�

Venting

INSTALLATION INSTRUCTIONS

Vent Pipe Wall Plate

Inspection

Access Panel

(Optional)

Inspection

Access Panel

(Optional)

CeilingFire

Stop

90˚

Elbow

1/4" Per Foot Downward Slope

(recommended)

Vent Seam

Venting for Direct-Vent Water Heater (cont.)

Venting

Recommended Vent Lengths

Number of 90°

Elbows (bends)

1 39 ft� (12�0 m)

2 37 ft� 6 in� (11�5 m)

3 36 ft� (11�0 m)

4 34 ft� 6 in� (10�5 m)

5 33 ft� (10�0 m)

6 31 ft� 6 in� (9�5 m)

Maximum Length

of Straight Pipe

Maximum Vent Length:

The system will not operate if there is excessive restriction (pressure drop) in the venting system� Use the chart above to calculate the maximum pipe run length with the required number of elbows (e�g�, a maximum 39 ft� [12 m] of vent pipe may be used provided there is only one 90° elbow in the system)�

A 90° elbow is equivalent to 1 ft� 6 in� (0�5 m) of straight pipe, while a 45° elbow is equivalent to 9 in� (0�25 m) of straight pipe�

The vent termination does not count as part of the straight pipe equivalent when determining the total vent length� The vent pipe should be installed with a slight downward slope of 1/4 in� per foot of horizontal run toward the vent termination� This ensures that any condensate formed during operation is evacuated from the water heater� It also prevents rain from entering the appliance� An upward slope on the vent termination is not acceptable for horizontal venting without using the condensate collector�

Minimum Vent Length:

The venting may be as short as 12 in. (30 cm), provided one vent termination is installed to the outdoors through a sidewall with one 90° elbow and one wall plate included in the installation. Total equivalent vent length is 30 in. (76 cm).

NOTICE:

Make sure that the seam of the inner vent pipe in a horizontal run is towards the top of the installation as shown above.

Venting Through Closed Spaces

If the coaxial vent piping passes through a closed space, a minimum clearance of 0 in. (0 cm) for vertical piping and for horizontal piping should be maintained between the coaxial vent pipe and combustibles and non combustibles. Be sure to follow local codes and vent manufacturer’s installation instructions.

For maintenance and inspection purposes, the following access panels may be required.

Two (2) inspection access panels large enough to allow access for venting inspection. One access panel may be close to where the coaxial vent pipe enters the ceiling. The other access panel may be near the vent termination.

Appliance Vent Adapter

Downward Slope

(recommended)

Upward Slope

Condensate Trap

Condensate Collector

CAUTION:

Ensure that the appliance vent adapter is securely attached to the water heater collar. Improperly connected vent adapter can cause damage to the appliance and/or poor performance.

Metal Fab Inc� standard concentric vent pipe can be installed into the water heater collar without an appliance vent adapter� However, other Rheem-approved vent manufacturer's pipe cannot be installed without a UL-approved Category III Stainless Steel appliance concentric vent adapter�

NOTICE:

To install the appliance vent adapter, please follow the appliance vent adapter manufacturer's instructions.

Draining Vent Condensate

INSTALLATION INSTRUCTIONS

Provision should be made to collect and dispose of condensate from the venting systems.

Venting

When a water heater is vented horizontally, the vent pipe should have a DOWNWARD or UPWARD slope towards the termination. If an UPWARD slope is used, always attach a drain hose to the condensate collector and plumb the hose to a sanitary sewer drain.

WARNINGS:

Failure to provide a vent condensate drain close to the water heater could allow acidic flue gas condensate to enter into water heater flueways, causing premature failure of the water heater.

If the condensate collector is not used, the drain fitting must be capped to prevent exhaust gases and condensate from entering the building� The cap is supplied on the water heater�

CAUTIONS:

Condensate is known to be acidic; refer to federal, state (provincial), and local codes for proper handling and discharge methods.

Condensate must be drained away from the water heater and should not be allowed to drain back into any part of the vent system.

The condensate collector must be used with vertical vent installation.

Condensate collector must be used with horizontal vent installation if the vent has an UPWARD slope toward the termination.

When a water heater is vented vertically, an UPWARD slope must always be used. Always attach a drain hose to the condensate collector and plumb the hose to a sanitary sewer drain.

Properly installed condensate traps prevent the condensate from draining back into the water heater.

A high-temperature silicone tubing suitable for use with acidic condensate and appropriate for the temperature range should be used.

The drain tube is fashioned into a “pigtail” trap and must be filled with water to prevent flue gases from emitting into the building prior to operating the water heater.

INSTALLATION INSTRUCTIONS

Outside Walls

Fixed

Closed

Fixed

Closed

Operable

Inside Wall

Vent Terminal

Air Supply Inlet

Area Where Terminal is Not Permitted

A J

D E

Venting for Direct-Vent Water Heater (cont.)

Horizontal Vent Terminal Location

Venting

INSTALLATION INSTRUCTIONS

Horizontal Vent Terminal Location (cont.)

The following chart details the minimal dimensional information needed to determine the proper location of the vent terminal for direct vent and outdoor tankless water heaters� See corresponding letter reference in the illustration on page 38�

Location

A = Clearance above grade, veranda, porch, deck, or

balcony�

B = Clearance to window or door that may be opened�

U.S. Installation Requirements

12 in� (30 cm) 12 in� (30 cm)

• 6 in� (15 cm) for water heaters less than or

equal to 10,000 Btuh (3 kW)�

• 9 in� (23 cm) for water heaters greater than

10,000 Btuh (3 kW) and less than or equal to 50,000 Btuh (15 kW)�

• 12 in� (30 cm) for water heaters greater

than 50,000 Btuh (15 kW)3�

C = Clearance to permanently closed window�

D = Vertical clearance to ventilated sofﬁt located

above the terminal within a horizontal distance of 2 ft� (61 cm) from the centerline of the terminal�

E = Clearance to unventilated sofﬁt�

F = Clearance to outside corner�

G = Clearance to inside corner�

H = Clearance to each side of centerline

extended above meter/regulator assembly�

I = Clearance to service regulator vent outlet�

J = Clearance to nonmechanical air supply inlet to

the combustion air inlet to any building or other appliance�

36 in (91 cm) recommended

18 in (46 cm) recommended

• 6 in� (15 cm) for water heaters less than or

equal to 10,000 Btuh (3 kW)�

• 9 in� (23 cm) for water heaters greater than

10,000 Btuh (3 kW) and less than or equal to 50,000 Btuh (15 kW)�

 



  



• 12 in� (30 cm) for water heaters greater

than 50,000 Btuh (15 kW)3�

K = Clearance to mechanical air supply inlet� 3 ft� (91 cm) above if within 10 ft� (3 m)

L = Clearance above paved sidewalk or paved driveway

located on public property�

M = Clearance under veranda, porch, deck, or balcony�

1 In accordance with current ANSI Z223�1/NFPA 54 National Fuel Gas Code� 2 In accordance with current CAN/CSA B149�1 Installation Codes� 3 For outdoor model, 4 ft (1�2 m) below or to side of opening; 1 ft (300 mm) above opening� 4 These are recommended minimum distances to prevent exhaust gas recirculation which may cause operational issues with the appliance�

horizontally�



Canadian Installation Requirements

• 6 in� (15 cm) for water heaters less than

or equal to 10,000 Btuh (3 kW)�

• 12 in� (30 cm) for water heaters greater

than 10,000 Btuh (3 kW) and less than or equal to 100,000 Btuh (30 kW)�

• 36 in� (91 cm) for water heaters greater

than 100,000 Btuh (30 kW)�

36 in (91 cm) recommended

18 in (46 cm) recommended

3 ft� (91 cm) within a height of 15 ft� (4�57 m) above the meter/regulator assembly�



3 ft� (91 cm)

• 6 in� (15 cm) for water heaters less than

or equal to 10,000 Btuh (3 kW)�

• 12 in� (30 cm) for water heaters greater

than 10,000 Btuh (3 kW) and less than or equal to 100,000 Btuh (30 kW)�

• 36 in� (91 cm) for water heaters greater

than 100,000 Btuh (30 kW)�

6 ft� (1�83 m)

7 ft� (2�13 m)

12 in� (30 cm)

†

For clearances not speciﬁed in ANSI Z223�1/NFPA 54 or CAN/CSA B149�1, one of the following shall be indicated:

a) A minimum clearance value determined by testing in accordance with section 2�20, or b) A reference to the following footnote: “Clearance in accordance with local installation codes and the requirements of the

gas supplier�”

†

A vent shall not terminate directly above a sidewalk or paved driveway that is located between two single-family dwellings and

serves both dwellings�

‡ Permitted only if veranda, porch, deck, or balcony is fully open on a minimum of two sides beneath the ﬂoor�

Venting

‡

INSTALLATION INSTRUCTIONS

Rising moisture will collect under eaves.

Inside

Corner

Caulk

If soffit vent is too close, block off and install new vent at another location.

Sheet metal plate on brick or masonry surface recommended.

6' (1.8 m) Caulk zone or to edge of window etc., starting within 6' (1.8 m)

(1.2 m)

Rising moisture will collect under eaves.

Inside

Corner

Caulk

If soffit vent is too close, block off and install new vent at another location.

6' (1.8 m) Caulk zone or to edge of window etc., starting within 6' (1.8 m)

(1.2 m)

12"

(300 mm)

Venting for Direct-Vent Water Heater (cont.)

Horizontal Vent Considerations

WARNING:

Moisture in the flue gas will condense as it leaves the vent terminal. In cold weather this condensate can freeze on the exterior wall, under the eaves,

Venting

and on surrounding objects. Some discoloration to the exterior of the building is to be expected. However, improper location or installation can result in severe damage to the structure or exterior finish of the building.

– DO NOT locate vent terminal on the side of

a building with prevailing winter winds. This will help prevent water lines from freezing and moisture from freezing on walls and under eaves.

– DO NOT locate vent terminal too close to

shrubbery, since flue gases may damage them.

– All painted surfaces should be primed to

lessen the chance of physical damage. Painted surfaces will require maintenance.

– Guard against accidental contact with people

and pets.

Indoor Tankless Water Heaters

WARNING:

For multiple-unit installation, a minimum distance between vent terminations must be maintained to prevent recirculation of vent gases. Maintain a horizontal center-to-center distance between vent terminations of 19 in. (48 cm) for two-unit installation, or 21 in. (53 cm) for installation of three or more units*.

– DO NOT terminate vent directly on brick or

masonry surfaces. A rust-resistant, sheetmetal backing plate is recommended behind the vent.

– Caulk all cracks, seams, and joints within

6 ft. (1.8 m) of the vent terminal.

– Caulk around wall faceplate for weather-tight

seal.

– DO NOT extend exposed vent pipe of indoor

water heaters outside of the building.

– This water heater requires its own separate

venting system. DO NOT connect the exhaust vent to an existing vent pipe or chimney.

*Vents cannot be stacked vertically.

minimum 19 in� (48cm)

minimum 21 in� (53cm)

Outdoor Tankless Water Heaters

– Install outdoor water heater such that air inlet and flue

outlet are above anticipated snow level�

Horizontal Vent Installation

WARNING:

Follow the vent manufacturer’s installation instructions since design might vary from manufacturer to manufacturer. Improper vent installation can result in death, personal injury, product damage, and/or poor performance.

CAUTION:

Use UL-approved Category III Stainless Steel vent material only. No other vent material is permitted for use with this appliance.

Outer casing can be galvanized aluminum or other material�

Fasteners will vary depending on the wall type�

For particle board or composite sheathing, use 4 hollow wall anchors. The anchors should be at least 1/8 in. (0.3 cm) in diameter and the appropriate length for the sheathing thickness.

INSTALLATION INSTRUCTIONS

Venting

Apply high temperature silicone sealant or silicone/ latex caulk around the vent section. Completely seal where it passes through the wall plate and where it is attached to the structure. This will provide a weather seal for the system, so it must be a good seal.

For plywood or solid wood sheathing or members, use 4 #10 x 1 1/4-in. wood screws.

For masonry walls, use suitable masonry anchors long enough to pass through the wall.

Reinstall the decorative sheathing around the faceplate. The decorative sheathing may be painted to match the exterior decor.

Attach the female end of the next vent pipe section to the male end of the 3-in./5-in. (7.6-cm/12.7-cm) concentric vent pipe. Push firmly on the pipe until the outer jacket has made contact with the snap ring on the male end of the concentric vent pipe section. Secure the two pipe sections with the provided self-tapping screws.

NOTICE:

When fully assembled, the outer female end will overlap the male end about 1 in. (2.5 cm).

DO NOT attempt to fabricate or adapt other vent pipe or materials to this venting.

Vent Pipe Wall Plate

Inspection

Access Panel

(Optional)

Inspection

Access Panel

(Optional)

Ceiling Fire

Stop

2' max.*

(610 mm)

1/4" Per Foot Downward Slope

90˚

Elbow

INSTALLATION INSTRUCTIONS

Venting for Direct-Vent Water Heater (cont.)

Horizontal Vent Installation (cont.)

Venting

Using a thick bead of high temperature silicone, seal the overlapping area of the outer 5-in. (12.7cm) pipe.

Attach required vent sections between the water heater collar and the horizontal vent termination.

Typical Horizontal Termination with

1/4 In. Per Foot of DOWNWARD Slope

CAUTION:

The condensate collector must be used in horizontal terminations if vertical rise in the vent system exceeds 2 feet (610 mm).*

NOTICES:

• Maintain the proper clearance between the vent pipe and combustible or noncombustible materials as described on page 29.

• A zero clearance of 0 in. (0 cm) is allowed between the air intake pipes and combustible material.

• Use proper support for the vent and air intake pipes as described on page 34.

• Support method used should isolate the vent pipe from floor joists or other structural members. This helps prevent transmission of noise and vibration.

• DO NOT support, pin, or secure the venting system in a way that restricts the normal thermal expansion and contraction of the chosen venting material.

INSTALLATION INSTRUCTIONS

Hole

Through Roof

Hole

Through Ceiling

A, B, C, D

Vertical Vent Installation

WARNING:

NOTICE:

Only Rheem-approved termination and parts should be used during installation.

Install a fire stop plate at every penetration of a floor or ceiling, whenever the vent is not running through a fire-rated shaft.

Venting

Support vertical and horizontal runs as described on page 36. Vertical supports are required every 4 ft. (1.2 m) along a vertical pipe route, after every transition to vertical, and after every offset elbow.

Maintain the recommended air space clearance to combustible materials and building insulation.

Cut a hole through the roof and interior ceiling to accommodate the vent pipe.

Complete the vent pipe installation to the water heater vent collar. If required, use high temperature silicone sealant where the vent connector joins the water heater.

NOTICE:

Free-standing vent pipe that penetrates a roof/ ceiling requires another means of support from a second location.

Determine the vent terminal height and install the vent pipe accordingly. Refer to “Vertical Vent Terminal Location” on page 44 for clearance requirements.

Install adequate flashing where the vent pipe passes through the roof.

INSTALLATION INSTRUCTIONS

A, B, C, D

Vent Pipe

Through Roof

Venting for Direct-Vent Water Heater (cont.)

Vertical Vent Terminal Location

Venting

The following chart with diagrams details the minimum dimensional information needed to determine the proper location of the vertical vent terminal for direct-vent indoor tankless water heaters:

U�S� Installation

Location

A = Minimum clearance above the roof level� 12 in� (30�5 cm) above roof level� 18 in� (45�7 cm) above roof level�

B = Minimum clearance above anticipated snow level� 12 in� (30�5 cm) above

C = Maximum clearance above roof level (without ad-

ditional vent support)�

D = Maximum clearance above anticipated snow level

(requires additional vent support)�

E = Required vent clearance from any gable, dormer, or

other roof structure with building access (i�e�, vent, window)�

F = Required vent clearance from any forced air inlet,

including dryer and furnace air inlets�

1 In accordance with current ANSI Z223�1/NFPA 54 National Fuel Gas Code� 2 In accordance with current CAN/CSA B149�1 Installation Codes�

Requirements

anticipated snow level�

24 in� (61 cm) above roof level� 24 in� (61 cm) above roof level�

24 in� (61 cm) above anticipated snow level�

4 ft� (1�2 m)� 4 ft� (1�2 m)�

10 ft� (3 m) 6 ft� (1�8 m)

Canadian Installation Requirements

12 in� (30�5 cm) above anticipated snow level�

24 in� (61 cm) above anticipated snow level�

NOTICE:

Only manufacturer-approved termination and parts should be used during installation.

Standard Vertical Vent Termination

Adjustable Roof Flashing

Vertical Te rmination Adapter

Air Intake

Storm Collar

Support Clamp

Fire Stop

To Drain: Dispose of condensate in accordance to local codes.

Condensate Trap

Fire Stop

3" to 5" Concentric Pipe

Support Hanger

1/4" Per Foot Upward Slope

INSTALLATION INSTRUCTIONS

Venting

CAUTION:

The condensate collector must be used with vertical vent installation.

INSTALLATION INSTRUCTIONS

Water Quality

Plumbing

Water quality must be taken into account when installing and maintaining the water heater. Water conditions outside of the levels specified below affect and may damage the water heater. Please note that

the limited warranty provided with the water heater does not cover defects, malfunctions or failures resulting from water conditions that are not in accordance with the specifications in the table below.

If you nonetheless install this water heater where the water conditions are not within the levels specified in

the table below, Rheem recommends that you take the following steps:

• Install a water treatment device or water softener at the same time as the original installation of the water heater. Rheem offers a water treatment accessory that can be installed with the water heater. (See below).

• Flush the water heater’s heat exchanger regularly. Rheem offers a flush kit and isolation valves to help remove scale build up. (See below)

Chart for Recommended Water Quality Levels

6�5–8�5 Up to 500 mg/L Up to 15 mg/L

Cited reference: National Secondary Drinking Water Regulations

(Total Dissolved

Solids) TDS

Free Carbon

Dioxide (CO2)

Total

Hardness

Up to

200 mg/L

Aluminum Chlorides Copper Iron Manganese Zinc

0�05 to

0�2 mg/L

Up to

250 mg/L

Up to

1�0 mg/L

Up to

0�3 mg/L

0�05 mg/L

Accessory part numbers listed below� See Parts and Accessories Catalog for more information�

Accessory Kit Replacement Filter Tankless Flush Kit Tankless Isolation Valve

AllClear Water Treatment Kit RTG20251 RTG20252

Scale Prevention Device RTG20246 RTG20247

Water Supply

CAUTION:

This water heater MUST ONLY be used with the following water supply conditions to prevent product damage and operation failure.

Clean, potable water free of corrosive chemicals, sand, dirt, or other contaminates�

Inlet water temperatures above 32°F (0°C), but not exceeding 120°F (49°C)�

DO NOT reverse the HOT and COLD water connections� DO NOT connect this heater to water lines previously

used for space heating� All water piping and components shall be suitable for potable water�

With recommended water quality (See chart above)�

Thermal Expansion

A thermal expansion tank will be required if the water heater is installed in a system with a recirculation or storage tank. This prevents damage to the heater, related piping, and the relief valve.

NOTICE:

Replacing the relief valve will not correct the problem!

The expansion tank is designed with a built-in air cushion that compresses as the system pressure increases. This relieves the over-pressure condition and eliminates the repeat operation of the relief valve.

For other approved methods of thermal expansion, contact an installing contractor, water supplier, or plumbing inspector.

RTG20124 RTG20220AB

Up to

5 mg/L

Water Supply Connections

power cord for approximately 10 minutes before

CAUTION:

IMPORTANT—DO NOT apply heat to the HOT or COLD water connections. If sweat connections are used, sweat tubing to the adapter before fitting the adapter to the water connections on the water heater. Any heat applied to the water supply fittings will permanently damage the internal components of the water heater.

NOTICE:

In cold environments, ice can accumulate in the water heater’s connectors. Plug in the water heater

making these connections. This will melt any ice buildup.

Plumbing should be carried out by a qualified plumbing contractor in accordance with local codes.

Only use approved plumbing materials. To allow the full flow capacity, it is recommended

to keep water inlet and outlet pipes 3/4-in. (1.9-cm) diameter or larger.

To conserve energy and to prevent freezing, insulate both COLD and HOT water supply lines. DO NOT insulate the pressure-relief valve.

INSTALLATION INSTRUCTIONS

Water Supply Connections (cont.)

Recirculation

Direct recirculation is allowed, provided the loop is thermostatically controlled, and a timer is used to turn the pump off during off peak periods. The pump must be sized for a minimum of 5 gpm at 25 ft of head plus building head. A 10°F difference between the loop thermostat setting and water heater temperature setting must be maintained.

To ensure proper operation of the water heater, follow these water pressure guidelines.

Operation of the water heater requires a minimum water pressure of 14 psi (97 kPa) and a minimum activation water flow rate of 0.4 gpm (1.5 lpm).

Continuous operation of the water heater requires a minimum water flow rate of 0.25 gpm (1.01 lpm).

Water pressure of 40 psi (276 kPa) is required to achieve maximum flow rate.

To maintain proper performance, there must be sufficient water supply pressure.

Required Water Pressure = Min. Operating Water Pressure (14 psi [97 kPa])

+ Pipe Pressure Loss

+ Faucet Pressure Loss

+ Safety Margin (more than 5 psi [34 kPa]).

To supply HOT water to upper floors, additional water pressure will be required (0.44 psi [3 kPa] per foot of height). Calculate the distance between the water inlet of the water heater (ground level) to the HOT water faucet farthest away from the water heater (upper floor level).

• Well water systems should be set to ensure a

minimum system pressure of 40 psi (276 kPa). The pressure should remain constant and stable during the operation of the water heater.

• Gravity water pressure is not recommended.

When the water is supplied from a water supply tank, the height of the tank, the diameter of the supply pipes, and their relation to water pressure need to be taken into consideration.

Plumbing

Water Supply Installation

NOTICE:

• Use only Teflon tape on all COLD and HOT water connections.

• If the water flow resistance of a showerhead is too high, the burner in the water heater will fail to ignite. Keep all showerheads clean from debris that could cause additional pressure drop.

• If using mixing valves on the outlet, choose one that prevents COLD water pressure from overcoming HOT water pressure.

• If multiple water heaters are installed in a manifold system, the water piping MUST be in “parallel” and the water pressure at each water heater should be 40 psi (276 kPa).

Install a COLD water shut-off valve near the inlet line on the water heater. This valve will be used for servicing and draining purposes.

NOTICE:

It is not recommended to use pipes with smaller diameters than the water supply connection of the water heater.

Before attaching the water line to the water heater, open the shut-off valve. Run the water until it has purged all contaminants (sand, debris, air, caulking).

Install a service valve on the end of the COLD water supply line and connect it to the water inlet on the water heater.

INSTALLATION INSTRUCTIONS

Cold Water

Service Valve

Hot Water

Service Valve

Hot Water

Service Valve

Pressure

Relief Valve

Relief

Valve

Water Outlet

Water

Inlet

Water

Inlet

Drain

Water Supply (cont.)

NOTICE:

Be sure to connect the COLD water inlet and the HOT water outlet as shown on the water heater. If reversed, the water heater will not function.

The flow rate of HOT water may vary when more than two faucets (appliances, fixtures, etc.) are

Open the drain valve in the COLD water outlet line to check the water flow through the water heater.

Plumbing

being used simultaneously.

The pipes MUST be completely drainable. If the HOT water faucets are located at a point higher than the water heater, place a drain valve at the lowest point.

Close the shut-off valve and remove, clean, and replace the water filter.

It is recommended to use unions and flexible copper connections at the COLD and HOT water lines. They allow the water heater to be disconnected easily for servicing.

Use the following guidelines when connecting the HOT WATER OUTLET:

Connections between the water heater and point(s) of use should be as short as possible.

Local codes shall govern the piping used for water connections.

To conserve energy and to prevent freezing, insulate both COLD and HOT water supply lines. DO NOT insulate drain line or pressure-relief valve.

Alternate Water Piping Arrangement With Preferred Valve Kit

Service valve kits can attach to all tankless water heater systems. All kits include two full-port isolation valves to be used in the COLD and HOT water lines. When installed, these valves allow one person full diagnostic testing and ease of flushing the system. Contact your distributor or place of purchase for availability and installation information.

INSTALLATION INSTRUCTIONS

Cold Water Supply

Shut-Off Valve

Union

Service

Valve

Service

Valve

Relief Valve

Cold Water

Supply Inlet

Hot Water

Supply Outlet

Relief Valve

Discharge Line

Relief Valve

A new pressure-relief valve, complying with the Standard for Relief Valves and Automatic Gas Shut-Off Devices for Hot Water Supply Systems, ANSI Z21.22/CSA 4.4, must be installed at the HOT water outlet connection of the water heater during installation. Local codes shall govern the installation of any relief valves.

NOTICE:

• The following drawing illustrates a pressure-only relief

valve. If local codes require a combination temperature and pressure-relief valve, you may need to install an extension piece to ensure that the relief valve probe is not directly in the flow path of the water.

• Local codes govern the installation of relief valves. If

local codes require that a temperature and pressurerelief valve be installed, the manufacturer recommends a type 40XL Watts temperature and pressure-relief valve or equivalent model be used.

• Manual operation of relief valves should be performed

at least once a year.

• If the relief valve on the system discharges

periodically, a problem exists. Turn off the water

heater, unplug the unit, and call for service.

For safe operation of the water heater, be sure that:

The pressure rating of the relief valve must not exceed 150 psi (1,034 kPa) or the maximum working pressure of the water heater. (See the rating plate on the water heater.)

The BTUH rating of the relief valve must equal or exceed the BTUH input of the water heater. (See the rating plate on the water heater.)

No valve of any type should be installed between the relief valve and the water heater.

Discharge from the relief valve should be piped to a suitable drain. Piping used should be of a type approved for the distribution of hot water.

HOT and COLD water lines should be insulated up to the water heater. See page 50.

The discharge line must be NO SMALLER than the outlet of the relief valve. The drain line must pitch downward to allow for complete drainage of the line and the valve.

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 in the discharge line.

Plumbing

One end of the relief valve discharge line connects to the HOT water outlet pipe as shown above. The other end of the pipe should be routed to a suitable drain to eliminate potential water damage.

INSTALLATION INSTRUCTIONS

Cold Water

Service Valve

Hot Water

Service Valve

Relief Valve

Water Outlet

Water

Inlet

Water

Inlet

Drain

Union

Manual Gas Supply Line

Shut-Off Valve

Cap

Sediment Trap

Manual Gas

Shut-Off Valve

Water Supply (cont.)

Hot and Cold Pipe Insulation Installation

WARNINGS:

When pipe insulation is not rated for the appropriate weather conditions, install electric heat tracing or equivalent to prevent freezing of the pipes.

DO NOT insulate or block drain valve on the hot outlet fitting.

If pipes are allowed to freeze, the water heater and the pipes may malfunction or leak due to freezing water.

For increased energy efficiency, use pipe insulation as shown in the diagram� Insulate the pipes all the way to the top� DO NOT cover any drain or pressure-relief valve(s)�

PlumbingGas Supply

NOTICE:

The hot and cold water supply pipes should be insulated to provide additional freeze protection.

Gas Supply

Gas Supply System

WARNING:

DO NOT attempt to convert this water heater for use with a different type of gas other than the type shown on the rating plate. Doing so could result in death, personal injury, explosion or fire, product damage, and/or poor operating conditions or performance.

NOTICE:

Gas piping shall be in accordance with local utility company requirements and/or in the absence of local codes, use the latest edition of National Fuel Gas Code (NFGC), ANSI Z223.1. In Canada, use the latest edition of CAN/CSA B149.1, Natural Gas and Propane installation code.

inside diameter must be 3/4" or greater and the rated capacity of the connector must be equal to or greater than the BTU capacity of the water heater. See manufacturer information for the gas connector. Lengths over 36 inches are not recommended.

DO NOT use excessive force when tightening the pipe sections. Excessive force can damage the water heater, especially when Teflon pipe compound is used.

Apply a thin coat of pipe compound to all threaded male ends. Compound must be of the type resistant to the action of LP gas.

To ensure proper water heater operation, the gas pipe and gas meter must be sized correctly.

If flexible connectors are used, the minimum

Gas Supply (cont.)

Gas Piping

INSTALLATION INSTRUCTIONS

Pipe-Sizing Procedure

The gas supply system must be properly sized to ensure the proper operation of this tankless water heater as well as all the gas appliances on the system. Failure to ensure the gas system, (meter, regulators, and piping) are properly sized could result in improper operation of this or other gas appliances. Insufficient gas pressure/supply can cause pilot outages, lockouts, or operating conditions that could lead to an appliance failure, improper combustion, carbon monoxide, sooting, or fire. Gas line sizing is based on gas type, the pressure drop in the system, the gas pressure supplied, and the gas line type. For gas pipe sizing in the United States, refer to the National Fuel Gas Code, (NFPA 54, ANSI Z223.1). For Canadian gas pipe sizing, refer to the Natural Gas and Propane Installation Code CAN/CSA B149.1.

These simplified instructions only address low pressure gas systems using Schedule 40 Metallic Pipe (Black Iron). For hybrid gas systems, high pressure main lines with regulators at the appliances, gas systems piped with corrugated stainless steel tubing (CSST), or Propane gas systems.

Determining the required regulator and gas meter size.

Find the BTU capacity of each appliance on the system. This information is located on a rating label attached to the appliance. Total the BTU of all the appliances together and divide that by the heating value of the fuel (for natural gas the average is 1,024 or 2,546 for propane). This will give you the total cubic feet per hour of gas required for the system.

At your gas meter/regulator there will be a rating plate that gives the cubic feet per hour capacity of that equipment. If the total gas required for the system is greater than the rating of the meter/ regulator then the local gas company will need to be contacted in order to upgrade the meter/ regulator for the system.

Determining the required pipe size.

The gas system is designed to operate at a certain maximum pressure drop. A pressure drop greater than what is permissible can cause operational issues with the gas appliances. The National Fuel Gas Code (NFPA 54, ANSI Z223.1 2012) allows for three pressure drop levels, a 0.3 inch W.C., (see table 2); a 0.5 inch W.C., (see table 3) and a 3.0 inch W.C., (see table 4) pressure drop for natural gas. Only a 0.5 inch W.C. pressure drop is allowable with Propane (see table 5). For Canadian installations the maximum allowable pressure drop is 0.5 inch W.C., (see table 3).

Measure the inlet gas pressure to the system using a manometer. For Natural Gas, if the inlet pressure is less than 8.0 inches W.C. then use Table 2 or 3 for your gas pipe sizing. Table 4 can only be used if the inlet gas pressure is 8.0 inches W.C. or greater. Table 4 cannot be used for Canadian installations.

The gas piping system consists of a main trunk line that runs from the meter/regulator and branch lines that run from the trunk line to the individual appliances. A branch may carry gas for more than one appliance.

The trunk line must be sized to carry the entire load of all the gas appliances on the system. As with determining the meter/regulator size, total the BTU of all the appliances together and divide that by the heating value of the fuel (for natural gas the average is 1,024 or 2,546 for propane). This will give you the total cubic feet per hour of gas required for the trunk line. Measure the total length of the line Refer to Table(s) 2, 3, or 4 and find the number closest to but higher than the total cubic feet per hour requirement calculation. This will tell you the minimum size that the trunk line must be.

Each branch line must be sized to carry the load of the appliance(s) attached to it. If more than one appliance is on a branch total the BTU and as with the trunk line divide that by the heating value of the fuel. Refer to Table(s) 2, 3, or 4 and find the number closest to but higher than the total cubic feet per hour requirement calculation for the branch and appliance(s). This will tell you the minimum size for that branch line and appliance.

Gas Supply

Cubic Feet Per Hour (CFH) =

Gas Input of

Water Heater (BTU/HR)

Heating Value of Gas (BTU/FT3)

Gas Supply

INSTALLATION INSTRUCTIONS

Gas Supply (cont.)

Final Considerations

If this water heater is replacing an existing water heater, it is important to verify the capacity of the gas system. Check the capacity of the meter/regulator, and verify the pipe lengths and sizes.

An improperly sized gas system will cause operational issues with this water heater. Other appliances on the gas system may be affected as well.

Flexible Gas Connectors may be used however the BTU capacity of the connector must be checked. Each connector has a capacity label on it, verify that the connector has a BTU capacity greater than that of the water heater. An undersized flexible gas connector will cause operational issues with this water heater.

Half-inch gas lines are permissible provided the gas system meets certain requirements. First, the gas

Table 2 - Pipe-Sizing - Natural Gas

Schedule 40 Metallic Pipe (Black Iron) Inlet System Pressure: Less than 2 PSI (55 inches W.C.) Allowable Pressure Drop: 0.3 inches W.C. Specic Gravity : 0.60 (Capacity in cubic feet per hour)

Length Pipe Size (Inches)

½ ¾ 1 1¼ 1½

10 131 273 514 1,060 1,580

20 90 188 355 726 1,090

30 72 151 284 583 873

40 62 129 243 499 747

50 55 114 215 442 662

60 50 104 195 400 600

70 46 95 179 368 552

80 42 89 167 343 514

90 40 83 157 322 482

100 38 79 148 304 455

Information in this chart obtained from NFPA 54, ANSI Z223.1 - 2012 Table 6.2(a)

pressure on the system must be 8.0 inch W.C. or greater. Second the capacity of the pipe as outlined in Table 4 is followed. If the existing pipes are too small it could cause a pressure drop greater than 3.0 inch W.C. and will cause operational issues with this water heater as well as other gas appliances on the system.

This is an example, in US, refer to current National Fuel Gas Code, NFPA 54 for correct pipe sizing chart, and in Canada, refer to current Natural Gas and Propane Installation Code CAN/CSA B149.1.

Table 3 - Pipe-Sizing - Natural Gas

Schedule 40 Metallic Pipe (Black Iron) Inlet System Pressure: Less than 2 PSI (55 inches W.C.) Allowable Pressure Drop: 0.5 inches W.C. Specic Gravity : 0.60 (Capacity in cubic feet per hour)

Length Pipe Size (Inches)

½ ¾ 1 1¼ 1½

10 172 360 678 1390 2090

20 118 247 466 957 1430

30 95 199 374 768 1150

40 81 170 320 657 985

50 72 151 284 583 873

60 65 137 257 528 791

70 60 126 237 486 728

80 56 117 220 452 677

90 52 110 207 424 635

100 50 104 195 400 600

Information in this chart obtained from NFPA 54, ANSI Z223.1 - 2012 Table 6.2(b)

Table 4 - Pipe-Sizing - Natural Gas

Schedule 40 Metallic Pipe (Black Iron) Inlet System Pressure: 8.0 inches W.C. or greater, but Less than 2 PSI (55 inches W.C.) Allowable Pressure Drop: 3.0 inches W.C. Specic Gravity : 0.60 (Capacity in cubic feet per hour)

Length Pipe Size (Inches)

½ ¾ 1 1¼ 1½

10 454 949 1,787 3,669 5,497

20 312 652 1,228 2,522 3,778

30 250 524 986 2,025 3,778

40 214 448 844 1,733 2,597

50 190 387 748 1,536 2,302

60 172 360 678 1,392 2,085

70 158 331 624 1,280 1,919

80 147 308 580 1,191 1,785

90 138 289 544 1,118 1,675

100 131 273 514 1,056 1,582

Information in this chart obtained from NFPA 54, ANSI Z223.1 - 2012 Table 6.2(c)

Table 5 - Pipe-Sizing - Undiluted Propane

Schedule 40 Metallic Pipe (Black Iron) Inlet System Pressure: 11 inches W.C. Allowable Pressure Drop: 0.5 inches W.C. Specic Gravity : 1.5 (Capacity in cubic feet per hour)

Length Pipe Size (Inches)

½ ¾ 1 1¼ 1½

10 291 608 1150 2350 3520

20 200 418 787 1620 2420

30 160 336 632 1300 1940

40 137 287 541 1110 1660

50 122 255 480 985 1480

60 110 231 434 892 1340

80 101 212 400 821 1230

100 94 197 372 763 1140

125 89 185 349 716 1070

150 84 175 330 677 1010

Information in this chart obtained from NFPA 54, ANSI Z223.1 - 2012 Table 6.3(d)

Gas Supply Installation

INSTALLATION INSTRUCTIONS

Install the manual gas appliance shut-off valve to the gas connection at the water heater. The shut-off is supplied with the water heater.

Install a ground joint union or ANSI design-certified semi-rigid or flexible gas appliance connector to the open end of the manual gas appliance shut-off valve. The (NFGC) ANSI Z223.1 and CAN/CSA B149.1 codes mandate the use of manual gas shut-off valves.

Install a manual gas supply line shut-off valve to the end of the gas supply line.

Using the proper-size piping, fittings, and components, build the gas supply line to the water heater.

NOTICE:

The gas supply line should be a minimum of 3/4in. (1.9-cm) black steel pipe or other approved gas piping material.

Gas Supply

Install a sediment trap at the lowest portion of the gas line�

The inlet gas pressure to the water heater must NOT exceed 10�5 in� w�c� (2�6 kPa) for natural gas and 13 in� w�c� (3�2 kPa) for LP gas� For purposes of input adjustment, the minimum inlet gas pressure (with main burner on) is shown on the water heater rating plate� If high or low gas pressures are present, contact your gas supplier for correction�

INSTALLATION INSTRUCTIONS

Gas Supply (cont.)

Leak Testing

WARNING:

Never use an open flame to test for gas leaks, because death, personal injury, and/or property damage can result.

The water heater and its gas connections MUST be leak-tested at normal operating pressures before the unit is placed in operation. These tests should also include all factory connections.

Turn on the gas shut-off valve(s) to the water heater.

Use a soapy water solution to test for leaks at all the connections and fittings. If bubbles are seen, it indicates a gas leak that must be corrected.

Gas Supply

Contact a qualified service technician.

Pressure Testing the Gas Supply System

CAUTION:

If inlet gas pressure is out of allowable range [4.0” w.c. (1.0kPa) – 10.5” w.c. (2.6kPa)] for Natural Gas, or [8.0” w.c. (2.0kPa) – 13.0” w.c. (3.2kPa)] for LP gas, a gas pressure regulator must be installed to maintain the allowable inlet gas pressure.

The water heater and its manual gas shut-off valve must be disconnected from the gas supply piping system whenever the pressure testing will exceed 1/2 psi (14 in. w.c. [3.5 kPa]).

The water heater must be isolated from the gas piping system whenever the pressure testing will be less than and/or up to 1/2 psi (14 in. w.c. [3.5 kPa]). Closing the manual gas shut-off valve will isolate the water heater from the gas piping system.

INSTALLATION INSTRUCTIONS

High-Altitude Installation

WARNING:

DO NOT install this water heater at elevations above 2000 ft. (610 m) without the proper adjustments. Failure to install a water heater suitable for the altitude at the location it is intended to serve can result in improper operation of the appliance resulting in property damage and/or producing carbon monoxide gas, which could result in personal injury or death.

Electrical Wiring

NOTICE:

For installations above 2000 ft. (610 m) elevation, contact a qualified service technician to make the proper altitude adjustments. You can also contact your local gas supplier, place of purchase, or call the Rheem Customer Service phone number listed on page 26 in the "Call for Assistance" section. See pages 70 and 71 for additional information.

DANGER:

Shock Hazard – Before servicing the water heater, turn off the electrical power to the water heater at the main disconnect or circuit breaker. Failure to do so will result in death or serious personal injury.

WARNING:

Field wiring connections and electrical grounding must comply with local codes or, in the absence of local codes, with the latest edition of the National Electrical Code, ANSI/NFPA 70, in the U.S., or Canadian Electrical Code, CAN/CSA C22.1, Part 1, in Canada.

CAUTION:

Labeling all wires prior to disconnection is recommended. Wiring errors can cause personal injury, product damage, and/or dangerous operating conditions. Verify correct operation after servicing.

NOTICE:

• DO NOT connect power until venting installation is

complete (see Venting Installation pages 34–45).

• Wait ninety (90) seconds after power is connected for

the first time to initiate operation of the water heater.

• Power consumption is up to 100 Watts during normal

operation, 3-5 Watts during standby, waiting to run, and up to 200 Watts during the freeze protection operation.

Power Cord

The electric power supply requirement for this water heater is 120 VAC/60 Hz, 2 Amps.

A dedicated circuit is recommended for the water heater. DO NOT connect to a GFCI or AFCI circuit. Multiple units may be connected to a single circuit up to the circuit rating.

DO NOT use 3-prong to 2-prong adapters. DO NOT use power strips or multiple outlet adapters.

All direct-vent gas models come with a threeprong power cord. Only use this power cord and a matching grounded electrical outlet.

All outdoor gas models do not come with a power cord. Only hard-wire to an appropriate power outlet with a ground terminal.

Keep any excess length of the power supply cord on the outside of the water heater.

If local codes require hard-wiring, see instructions for “Hard-Wiring the Electrical Connections” below.

Hard-Wiring the Electrical Connections

Wiring should be performed by a qualified electrician in accordance with local codes.

The water heater requires a properly grounded 120 VAC/60 Hz power supply. Multiple water heaters may be connected to a single circuit up to that circuit’s rating.

DO NOT connect grounding wire to water pipes, gas pipes, telephone cables, lighting conductor circuits, or to any other grounding circuits that require a GFCI or AFCI (arc fault circuit interrupter).

An ON/OFF switch must be provided and installed for the incoming 120 VAC power supply.

Wire the water heater exactly as shown in the wiring diagram. This wiring diagram can also be found inside the water heater cover panel.

The green screw is provided in the enclosure for a grounding connection.

Connect the live wire to the black wire and neutral wire to the white neutral wire.

Gas Supply

Electrical

INSTALLATION INSTRUCTIONS

Electrical Wiring (cont.)

Wiring Diagram

Electrical

INSTALLATION INSTRUCTIONS

Remote Control Selection and Location

WARNING:

NOTICE:

The provided remote control will allow maximum temperature settings of 120°F (49°C). Temperatures up to 140°F (60°C) for residential applications and up to 185°F (85°C) for commercial applications* can be achieved with the MAIN (UMC-117) remote control. Only qualified service personnel should perform this adjustment.

• An optional cable (EZ Link CableTM) can be purchased separately to manifold two water heaters together�

• DO NOT attempt to disassemble a remote control� All controls are sealed and calibrated for accurate water heater control and operation�

One remote control is provided with the water heater� Additional remote controls may be purchased separately� The available remote controls are listed in the following chart� Up to three remote controls can be used with the water heater� No other manufacturer’s controls are suitable for use with this water heater�

Review the following considerations before determining the location of the remote control(s):

• DO NOT install any remote control outdoors or where it can come in contact with water�

•

Avoid installing the remote control in the following areas and/or conditions: – area exposed to heat� – area exposed to steam� – area exposed to oil� – area exposed to direct sunlight�

– areas near stored or used

flammable products�

• Place remote control out of children’s reach�

• The remote control should be installed in a convenient location (e�g�, kitchen, laundry room, utility room, or directly next to the water heater)�

• The maximum distance between the water heater and the remote control installation location is limited to 195 ft� (59 m) of wire�

Electrical

Remote Control

Model Number

UMC-117 MAIN

USC1-117

USC2-117 BATH 2

MIC-6 or MIC-185**

Manifold System

*A commercial conversion kit can be purchased to achieve temperatures up to 185°F (85°C)� ** When a manifold system is installed, the main remote control connected to the manifold controller (MIC-6 or MIC-185)

has priority over the remote controls connected to the water heater�

Remote Control

Description

BATH 1

Manifold System Optional (Sold Separately)

Temperature

Set Point Range Availability

100°F–120°F (38°C–49°C) Factory Default

85°F (29°C)

125°F–140°F (52°C–60°C)

85°F (29°C)

125°F–185°F (52°C–85°C)

100°F–120°F (38°C–49°C) Optional (Sold Separately)

85°F (29°C) Qualiﬁed Technician Adjustment

100°F–120°F (38°C–49°C) Optional (Sold Separately)

85°F (29°C) Qualiﬁed Technician Adjustment

Adjustment for Commercial Products*

Qualiﬁed Technician

Adjustment for Residential Products

Qualiﬁed Technician

INSTALLATION INSTRUCTIONS

Electrical Wiring (cont.)

Remote Control Installation

WARNING:

NOTICE:

Extension cable can be any 18 AWG wire similar to a thermostat wire and need not be polaritysensitive.

It is not recommended to have wiring exposed. DO NOT apply sealant to remote control cable. DO NOT use network cable, telephone wire, or any

twisted-pair cable.

Connecting the MAIN (UMC-117) Remote Control to a Wall:

Install the base plate to the wall using suitable screws and wall anchors.

NOTICE:

The tabs on the base plate should always point out.

Electrical

Drill a 1- to 1 1/2-in. (2.5/3.8-cm) hole at the proposed control location. Install the remote control cable between the location of the remote control and the water heater.

Remove the remote control from the base plate.

Connect the remote control to the remote control cable.

Position the remote control on the base plate.

NOTICE:

The tabs on the base plate should line up with the slots on the back of the control panel.

Secure the control panel to the base plate with one screw into the bottom tab.

NOTICE:

DO NOT attempt to connect the remote control or control wire to the water heater while the water heater has power applied to it. Damage to the water heater will occur. DO NOT cut or strip the wiring while it is connected to the water heater or while the water heater has power applied to it.

Feed the remote control cable through the large center hole in the base plate.

Remote Control Installation (cont.)

Remote Control

Connection Cover

Connecting the Remote Control to the Water Heater:

INSTALLATION INSTRUCTIONS

Ensure that the power to the water heater has been disconnected.

Loosen the one screw located on the remote control connection cover. The connection cover is made of white plastic.

NOTICE:

DO NOT REMOVE FRONT PANEL. Remote control wires are connected on the bottom of the unit.

There are no accessible remote control terminals inside the water heater.

Firmly tighten the terminal screws by hand.

Secure the remote control extension cable on the hook located on the side of the remote control connection base.

Electrical

Reinstall the remote control connection cover and secure with the one screw.

Connect the remote control extension cables from the remote control to the remote control connection terminals.

NOTICE:

The remote control wire connection terminals are not polarity-sensitive.

Switch on the power supply to the water heater. Check for proper operation of the remote control and the water heater.

INSTALLATION INSTRUCTIONS

Insulation Blankets

Electrical

In general, insulation blankets for external use on gas water heaters are not necessary� The purpose of an insulation blanket is to reduce the standby heat loss from the water heater’s storage tank� Since these water heaters do not store water, they eliminate the need for the insulation blanket�

WARNING:

NEVER cover the air inlet, flue outlet, or operating and warning labels attached to the water heater. Covering these components will cause dangerous operating conditions that can lead to death, personal injury, property damage, and/or product damage.

Installation Precautions

Follow all installation instructions covered in this manual.

Check the inlet gas pressure to make sure it is within the range specified on the rating plate.

Make sure there is adequate air for combustion and ventilation as described on pages 38–39 or page 43 in this manual.

Maintain proper clearances to combustibles and non combustibles as specified on the rating plate.

Make sure the venting system complies with local codes, National Fuel Gas Codes (ANSI Z223.1/ NFPA 54) or CAN/CSA B149.1, and the guidelines found on pages 34 through 45 in this manual.

The manufacturer’s warranty does not cover any damage or defect caused by insulation, insulation attachment, or use of any type of energy-saving or other unapproved devices (unless authorized by the manufacturer)� The use of unauthorized energy-saving devices can result in death, personal injury, and/or property damage� The manufacturer disclaims any responsibility for such loss or injury resulting from the use of such unauthorized devices�

Contact the local gas company to make sure the gas meter and gas piping are adequately sized.

Use Teflon tape on all male water line connections and fittings.

DO NOT block or restrict any air intake openings.

DO NOT remove the front cover unless absolutely

necessary. This should only be done by a qualified service technician.

DO NOT install this product where standing water may occur.

DO NOT use pipe dope on water line connections and fittings.

Installation Checklist

INSTALLATION INSTRUCTIONS

A. Water Heater Location

Indoor water heaters must be installed indoors�

Outdoor water heaters must be installed outdoors�

Close to area of ventilation termination (indoor models)�

Protected from freezing temperatures�

Proper clearance from combustible material observed�

Sufficient fresh air supply for proper operation of water heater�

Air supply free of corrosive elements and flammable vapors�

Provisions made to protect area from water damage�

Sufficient room to service heater�

Combustible materials, such as clothing, cleaning materials, and rags, clear of the heater and vent piping�

C. Water Supply/Relief Valve

Water supply has sufficient pressure�

Air has been purged from the water heater and the piping�

Water connections tight and free from leaks�

Water filter is clean and in place�

All piping has been assembled as described on pages 47 and 48�

Water pipes are insulated and protected from freezing, if necessary�

Pressure-relief valve properly installed with discharge line running to open drain�

Discharge line protected from freezing, if necessary�

D. Gas Supply

Gas type matches listing on rating plate�

Gas supply pressure is sufficient for the water heater�

Water heater is properly attached to the wall�

B. Coaxial Vent (Indoor Models)

Vent pipe material is Category III and is manufacturer-approved�

Horizontal vent runs have 1/4 in� per foot of DOWNWARD slope towards the vent terminal�

Vertical venting is installed as described on pages 44 and 45�

Connector(s) securely fastened together with hightemperature silicone (500°F [260°C]) and airtight�

All coaxial vent runs are properly installed�

Vent terminal is properly installed�

Maximum vent length is observed�

Gas line equipped with shut-off valve, union, and sediment trap as described on page 53�

Approved pipe-joint compound has been used on all gas pipe connections�

All connections and fittings have been checked for leaks with a soapy water solution�

Gas company inspected installation (if required)�

E. Electrical Wiring

Supply cord and/or wiring meets all local codes, National Electrical Code, ANSI/NFPA 70, in the U�S�, or Canadian Electrical Code, CAN/CSA C22�1, Part 1, in Canada�

Voltage matches listing on rating plate�

Water heater is properly grounded�

F. Condensate

Drain hose is attached to the condensate collector, and condensate is drained as described on page 37�

Checklist

INSTALLATION INSTRUCTIONS

Air Handler

Piping for Space Heaters

Local codes or plumbing authority requirements may vary from the instructions or diagrams provided in this manual and take precedence over these instructions�

Combination Potable and Space Heating Application

DANGERS:

When this system requires water for space heating at elevated temperatures (above 125°F [52°C]), a mixing or tempering valve must be installed in the hot water supply line to the house in order to reduce the scald hazard potential.

• Any piping or components used in the installation of this water heater in a combination potable and space heating application must be suitable for use with drinking water.

Typical Combination Illustration

• If this water heater is installed in an application intended to supply domestic hot water needs and hot water for space heating purposes, do not connect the heater to an existing heating unit or components of a heating system that have previously been used with a nondrinking water system. Toxic chemicals such as those used for boiler treatment may be present and will contaminate the drinking water supply causing possible health risks. Never introduce toxic chemicals, such as those used for boiler treatment, into this system.

• This water heater is not approved as the dedicated space heating unit. This water heater must be used for combination applications with air handler only and not for indoor heating applications.

Space Heater

Remote Control

Tankless

Water Heater

Single Unit

Hot Water

to Fixtures

Hot Water

Loop

Dedicated

Return Line

Circulation

Pump

Expansion

Tank

Wire to Connect

to Pump

Cold water

to Tankless

Cold Water

Supply

3/4”

Recirculation Control

INSTALLATION INSTRUCTIONS

Local codes or plumbing authority requirements may vary from the instructions or diagrams provided in this manual and take precedence over these instructions�

Your tankless water heater has the ability to control an external recirculation pump� Two modes are available, Energy Saver and Performance, which recirculate the water in the plumbing system to provide hot water more quickly when a faucet is opened� Rheem offers a fully packaged recirculation pump kit� See the Parts and Accessories catalog for more information�

NOTICE:

Recirculation control is for residential application only. Recirculation control cannot be used with an air handler or with multiple water heater installations. The maximum temperature setting is 140°F (60°C) in recirculation control.

Typical Recirculating Pump Installation

Pump Requirements

Voltage: 120V, 60Hz In-rush current: Less than 2�5 amps Amperage: less than 2�0 amps

WARNING:

A control board can be damaged if amperage exceeds 2.0 amps.

Pump Size

The pump should be sized for about 2�5 gpm at the pressure drop through the tankless water heater and the supply and return plumbing in the recirculation loop� Contact service department listed on page 26 of this use and care manual if you need more information�

Recirculating Pump

INSTALLATION INSTRUCTIONS

Control Board

Dip Switches

Control

Board

PUMP

Add

4 Amp

Fuse

Blue

connector

Cut blue connector

and splice wires.

Ground

Recirculation Control (cont.)

Installation

Disconnect all electric power to the water heater.

To connect to the pump, cut the blue connector, splice the wires, and add a 4 amp fuse to the hot wire of the pump.

Recirculating Pump

Remove the front cover panel on the water heater.

Install the recirculation pump on the return line according to the pump manufacturer installation instructions. Install a check valve in the return line as shown in typical recirculation pump installation if one is not integrated into the pump. See the bottom of page 63 for Typical Recirculation Pump Installation.

* Check valve is included in Rheem

recirculation pump kit.

Control

Board

Blue

connector

The wire harness for the recirculation pump is bundled with the wire harness from the control board. Find a blue connector with a black and a white wire.

Connect the ground wire from the pump to a screw at the base of the water heater cabinet.

NOTICE:

Follow any applicable electrical code and the pump manufacture installation instruction referring to the Pump Electrical Connection Diagram in Step 5 of these instructions.

Find DIP Switch 2 in the top-right portion of the control board. The switch labeled “DIP 2” is the bottom switch.

As set from factory

The factory setting for this switch should all be in the OFF position (DOWN).

Change the first switch on “DIP 2” to the ON position (UP). Performance mode is selected.

INSTALLATION INSTRUCTIONS

Turn On the remote control. The pump and water heater will turn on to raise recirculation loop temperature.

Recirculation Operation

The water heater is turned ON when the recirculation pump starts operation. The water heater produces hot water at the setting temperature. When the return water temperature reaches approximately 15°F below the setting temperature, the water heater and the pump will turn OFF. The cycle will restart at the approximate time interval in the table below based on the temperature thermistor readings.

Energy Saver Mode

The Energy Saver mode operates as follows:

• Less energy consumption due to fewer pump cycles

• Pump cycles ON every 30 to 69 minutes

Performance Mode The Performance mode operates as follows:

• Higher energy consumption due to more pump cycles

• Pump cycles ON every 15 to 35 minutes

To select Energy Saver mode, change the fourth switch on “DIP 1” to the ON position (UP).

Replace the front cover panel.

Turn on all electric power to the water heater.

Setting Temp Typical Pump ON Intervals [Min]

[°F] Performance Energy Saver

140 15 30

135 15 30

130 15 30

125 15 30

120 16 31

118 17 33

116 18 35

114 19 38

112 20 40

110 22 44

108 24 47

106 26 51

104 28 56

102 31 62

100 35 69

Actual pump ON intervals may vary based on the setting temperature, insulation, and heat loss in the system.

Recirculating Pump

INSTALLATION INSTRUCTIONS

Activating the Water Heater

WARNING:

Before operating this water heater, be sure to read and follow the instructions on the following label, all labels on the water heater, and the “Important Safety Information” section in this manual. Failure to do so can result in unsafe operating conditions that can result in death, personal injury, property damage, and/or product damage.

NOTICE:

If you have any problems reading or following the instructions in this manual, STOP and call a qualified service technician or contractor.

FOR YOUR SAFETY READ BEFORE OPERATING

WARNING : If you do not follow these instructions exactly, a fire or explosion may result

causing property damage, personal injury or loss of life.

Start/Adjust

OPERATING INSTRUCTIONS

1.STOP! Read the safety information above on this label.

2.Turn off all electric power to the appliance.

3.Do not attempt to light the burner by hand.

4.Turn the Gas Shutoff Valve located on the outside of the unit clockwise to the "OFF" position.

5.Wait five (5) minutes to clear out any gas. If you then smell gas, STOP! Follow "B" in the safety information above on this label. If you don't smell gas, go to the next step.

6.Turn the Gas Shutoff Valve located on the outside of the unit counterclockwise to the "ON" position.

7.Turn on all electric power to the appliance.

8.If the appliance will not operate, follow the instructions "To Turn Off Gas To Appliance" and call your service technician or gas supplier.

GAS SHUTOFF

VALV E

OPEN CLOSE

TO TURN OFF GAS TO APPLIANCE

1.Turn off all electric power to the appliance if service is to be performed.

2.Turn the Gas Shutoff Valve located on the outside of the unit clockwise to the "OFF" position.

INSTALLATION INSTRUCTIONS

Operating Instructions

Read, understand, and follow the safety information listed on the operating label on page 63 and in the “Important Safety Information” section on pages 2-8 in this manual.

Disconnect all electric power to the water heater.

Turn the gas shut-off valve clockwise to the OFF position. This valve is located on the outside of the water heater. Wait 5 minutes to clear any gas. If you don’t smell gas, proceed to Step 3.

Turn on all electric power to the water heater. The water heater burner will automatically light when there is a demand for hot water.

WARNING:

DO NOT attempt to light the burner by hand. Lighting the burner by hand is an unsafe operating condition that can result in death, personal injury, property damage, and/or product damage.

If the water heater burner will not light, turn off the water heater as described below and call your service technician or gas supplier.

Shutting Off the Water Heater

NOTICE:

If you smell gas, STOP and follow the safety instructions listed under B on the operating label or on the front cover of this manual.

Turn the gas shut-off valve counterclockwise to the ON position�

Disconnect all electric power to the water heater.

Turn the gas shut-off valve clockwise to the OFF position.

Start/Adjust

INSTALLATION INSTRUCTIONS

In-Use

Indicator (Lit during operation)

Priority

Indicator

Temperature

Adjustment

Buttons

ON/OFF

Button and

Indicator

LED Display

(Displays

water

temperature

and error

codes)

The contents on pages 68 through 75 should only be performed by qualified service personnel.

Setting the Water Temperature

WARNING:

Improper adjustment, alteration, service, or maintenance can result in death, personal injury, property damage, and/or product damage.

Maximum Temperature Adjustment by the Main Remote Control (UMC–117)

DANGER:

Water temperatures above 125°F (52°C) will result in death and/or severe burns from scalding.

WARNING:

Refer to chart below and the scald potential warnings on page 4 on this manual before making an adjustment. Changing this setting is done at your own risk.

Time/Temperature Relationship in Scalds

Water Time to Produce Temperature a Serious Burn

Table courtesy of Shriners Burn Institute

Residential water heater temperatures can be adjusted up to 140°F (60°C). DO NOT perform the following adjustment if a setting of up to 140°F (60°C) is not required.

To change the temperature settings up to 140°F (60°C):

Turn on the remote control.

Turn off the gas and water to the water heater by closing the shut-off valves.

Start/Adjust

Press the UP adjustment button repeatedly until 120°F (49°C) shows in the LED display. Hold the UP button until “140” on the display starts to blink.

NOTICE:

LED display only shows °F.

INSTALLATION INSTRUCTIONS

While “140” is blinking, press the UP and DOWN adjustment buttons at the same time. “140” will appear without blinking.

Press the UP or DOWN adjustment button to set the desired temperature.

Turn on the gas and water to the water heater by opening the shut-off valves.

To limit maximum water temperature setting to 120°F (49°C):

Press the DOWN adjustment button repeatedly until 100°F (38°C) or 85°F (29°C) shows in the LED display. Hold the DOWN button until the number on the display starts to blink.

While the number is blinking, press the UP and DOWN adjustment buttons at the same time. The number will stop blinking.

Press the UP or DOWN adjustment button to set the desired temperature.

Turn on the remote control.

Turn off the gas and water to the water heater by closing the shut-off valves.

Turn on the gas and water to the water heater by opening the shut-off valves.

Start/Adjust

INSTALLATION INSTRUCTIONS

Setting the Water Temperature (cont.)

Minimum Temperature Adjustment by the Main Remote Control (UMC–117, USC1–117, and USC2–117)

Residential water heater temperatures can be adjusted down to 85°F (29°C), when required.

To change the temperature settings down to 85°F (29°C):

Turn on the remote control.

Turn off the gas and water to the water heater by closing the shut-off valves.

Press the DOWN adjustment button repeatedly until 100°F (38°C) shows in the LED display.

NOTICE:

LED display only shows °F.

Press the DOWN adjustment button 3 times within 5 seconds. The display will show “85.”

Turn on the gas and water to the water heater by opening the shut-off valves.

Start/Adjust

High-Altitude DIP Switch Adjustments

When the water heater is installed above 2000 ft. (610 m), the settings on the DIP switch located on the control board must be changed. If these settings are not changed, the water heater will not function properly.

NOTICE:

If the water heater is installed under 2000 ft. (610 m) altitude, no adjustments are necessary.

NOTICE:

The maximum flow rate at 85°F (29°C) is 1.3 gpm (5.0 L/m).

Verify the altitude that the water heater is installed.

Turn off the gas and water to the water heater by closing the shut-off valves.

Control Board

Dip Switches

INSTALLATION INSTRUCTIONS

High-Altitude DIP Switch Adjustments (cont.)

If altitude is above 2000 ft. (610 m) and below 5,400 ft. (1650 m), change the third switch on “DIP 2” to the ON position (UP).

Remove the front cover panel on the water heater.

Find DIP Switch 2 located in the top-right portion of the control board. The switch labeled “DIP 2” is the bottom switch.

As set from factory

If altitude is above 5,400 ft. (1650 m) and below 8,500 ft. (2590 m), change the fourth switch to the ON position (UP).

NOTICE:

DO NOT alter any other DIP switch settings. The manifold pressure will be reduced accordingly.

Some models are not available at higher than 5400 ft (1650m). Please contact technical service listed on page 26 of this use and care manual if you have any questions of high altitude DIP switch adjustments.

The factory settings for this switch should all be in the OFF position (DOWN).

Replace the front cover panel.

Start/Adjust

Turn on the gas and water to the water heater by opening the shut-off valves.

INSTALLATION INSTRUCTIONS

Control Board

Dip Switches

Water Saving Control

Water saving control is optional and is inactive as default. To activate this control, appropriate procedures must be followed.

Water saving control can reduce waste water at initiation of hot water demand by reducing flow until set temperature is reached of outlet hot water. It is recommended to turn ON this control if the water heater is installed in a drought area or anywhere water conservation is needed.

Follow the steps below to turn ON the water saving control.

Change the third switch on “DIP 1” to the ON position (UP).

Turn off the gas and water to the water heater by closing the shut-off valves.

Remove the front cover panel on the water heater.

Replace the front cover panel.

Turn on the gas and water to the water heater by opening the shut off valves.

Follow the below steps to turn OFF the water saving control.

Turn off the gas and water to the water heater by closing the shut-off valves.

Start/Adjust

Find DIP Switch 1 located in the top-right portion at the control board. The switch labeled “DIP 1” is the top switch.

Control Board

Dip Switches

Remove the front cover panel on the water heater.

INSTALLATION INSTRUCTIONS

Find DIP Switch 1 located in the top-right portion at the control board. The switch labeled “DIP 1” is the top switch.

Change the third switch on “DIP 1” to the OFF position (DOWN).

Turn on the gas and water to the water heater by opening the shut-off valves.

Start/Adjust

INSTALLATION INSTRUCTIONS

MIN

MAX

ADJ

Control Board

Dip Switches

MIN

MAX

ADJ

Maintenance Notice

Maintenance notice is an optional control and is inactive as default. Maintenance notice reminds users of water heater maintenance activities such as flushing the heat exchanger or replacing the water treatment filter (if applicable) in order to maximize the life of your tankless water heater. Contact technical service department listed on page 26 of this use and care manual if you are not familiar with these maintenance activities.

As set from factory

Turn off the remote control.

Turn off the gas and water to the water heater by closing the shut-off valves.

The factory settings for this switch should all be in the OFF position (DOWN).

MIN MAX ADJ

Change the third and fourth switches on “DIP 2” to the ON position (UP).

Start/Adjust

Remove the front cover panel on the water heater.

Find DIP switch 2 located in the top-right portion of the control board. The switch labeled “DIP 2” is the bottom switch.

Push and hold “Max” button until “ON” is shown on the display of the remote control.

Change the third and fourth switches on “DIP 2” to the OFF position (OFF).

Replace the front cover panel.

INSTALLATION INSTRUCTIONS

Turn on the gas and water to the water heater by opening the shut off valves.

Turn on the remote control.

Error Code 88 Clearing

When a tankless water heater has a certain number of hours of combustion, error code “88” is shown on the remote control. It is highly recommended to perform water heater maintenance activities such as flushing the heat exchanger and/or replacing the water treatment filter (if applicable). After these maintenance activities are made, follow the steps below in order to clear error code “88”.

Turn on the remote control.

Press the DOWN adjustment button repeatedly until the lowest setting temperature shows in the LED display.

Press and hold the DOWN and UP adjustment button for 5 to 10 seconds.

Turn off the gas and water to the water heater by closing the shut-off valves.

Start/Adjust

Turn on the gas and water to the water heater by opening the shut off valves.

If error code "88" is still shown, repeat steps 1 through 5 above.

PARTS REPLACEMENT

Parts Ordering

WARNING:

For your safety, DO NOT attempt to disassemble, repair, or replace any portion of this unit. Refer all repairs, service, and/or adjustments to qualified service personnel.

Address all parts orders to the distributor or store where the water heater was purchased. All parts orders should include:

Direct-Vent Gas Components

1. The model and serial number of the water heater from the rating plate.

2. Specify the gas type (natural or LP) as marked

on the rating plate.

3. Parts description (as shown below) and number

of parts desired.

Parts

Ref # Description

1 Control Board

2 Gas Valve Assembly

3 Burner Assembly

4 Igniter Coil

5 Blower Motor

6 Burner Manifold

7 Gas Inlet Connector 3/4"

8 Water Control Valve

Ref # Description

8a Water Bypass Valve

9 Water Inlet Connector 3/4"

10 Inlet Water Filter

11 Hot Outlet Connector 3/4"

13 Front Cover

14 Remote Control Terminal Block

15 Concentric Vent Connector Assembly

Outdoor Gas Components

PARTS REPLACEMENT

Ref # Description

1 Control Board

2 Gas Valve Assembly

3 Burner Assembly

4 Igniter Coil

5 Blower Motor

6 Burner Manifold

7 Gas Inlet Connector 3/4"

8 Water Control Valve

8a Water Bypass Valve

9 Water Inlet Connector 3/4"

10 Inlet Water Filter

11 Hot Water Outlet Connector 3/4"

13 Front Cover

14 Remote Control Terminal Block

Parts

NOTES

LIMITED WARRANTY

For the RHEEM®, RUUD®, Richmond®, Paloma®, and Sure Comfort® Residential Tankless Gas Water Heaters.

GENERAL

This Limited Warranty is only available to the original owner of the water heater at the original installation location. This Limited Warranty is not transferable.

Rheem Sales Company, Inc. (Rheem) warrants this tankless gas water heater, and its component parts, to be free from defects in materials and manufacture, under normal use and service, for the Applicable Warranty Period specified below. At its option, Rheem will repair or replace the defective water heater, or defective component part(s), in accordance with the terms of this Limited Warranty, if it fails in normal use and service during the Applicable Warranty Period. The replacement water heater must be manufactured by Rheem under one of the covered brand names. The replacement component part(s) must be Rheem authorized component part(s). The replacement unit will be warranted only for the unexpired portion of the original unit’s Applicable Warranty Period.

Rheem strongly recommends that this tankless water heater be installed by a contractor that is licensed, state qualified and trained on Rheem's tankless products because improper installation may invalidate warranty coverage.

EFFECTIVE DATE

The Effective Date of warranty coverage (or the beginning of the Applicable Warranty Periods) is the date of the original installation of the water heater, if properly documented. Otherwise, it is the date of manufacture of the water heater plus ninety (90) days.

APPLICABLE WARRANTY PERIODS: The Applicable Warranty Period depends on the type of installation, as described below: Residential: a Single Family Dwelling

Residential: a Single Family Dwelling used with Hydronic Force Air Heating

Ten (10) years from the Effective Date for the heat exchanger, five (5) years from the Effective Date for the component parts, and one (1) year from the Effective Date for certain labor as described under the heading, LABOR, SHIPPING AND PROCESSING COST. Provided that a Rheem manufactured/ Rheem approved potable water hydronic air handler is installed with the system.

Residential: a Single Family Dwelling with recirculation, controlled loop

Twelve (12) years from the Effective Date for the heat exchanger, five (5) years from the Effective Date for the component parts, and one (1) year from the Effective Date for certain labor as described under the heading, LABOR, SHIPPING AND PROCESSING COST. Provided that the recirculation system is an on demand type system or the pump is controlled with a temperature sensor (aquastat) and timer.

Residential: a Single Family Dwelling with recirculation, uncontrolled loop

Three (3) years from the Effective Date for the heat exchanger, three (3) years from the Effective Date for the component parts, and one (1) year from the Effective Date for certain labor as described under the heading, LABOR, SHIPPING AND PROCESSING COST, if the water heater is installed in a system in which the water is re-circulated using a continuously operating pump.

Commercial: any installation that is not a single family dwelling

Commercial: with recirculation, controlled loop

Five (5) years from the Effective Date for the heat exchanger, five (5) years from the Effective Date for the component parts, and one (1) year from the Effective Date for certain labor as described under the heading, LABOR, SHIPPING AND PROCESSING COST. Provided that the recirculation system is an on demand type system or the pump is controlled with a temperature sensor (aquastat) and timer.

Commercial: with recirculation, uncontrolled loop

WARRANTY EXCLUSIONS

This Limited Warranty will not cover: a) Damages, malfunctions or failures resulting from:

Chart for Recommended Water Quality Levels

pH (Total Dissolved Solids) TDS Free Carbon Dioxide (CO2) Total Hardness Aluminum Chlorides Copper Iron Manganese Zinc

6�5–8�5 Up to 500 mg/L Up to 15 mg/L Up to 200 mg/L 0�05 to 0�2 mg/L Up to 250 mg/L Up to 1�0 mg/L Up to 0�3 mg/L Up to 0�05 mg/L Up to 5 mg/L

Cited reference: National Secondary Drinking Water Regulations

1. Installation of the water heater in environments in which water quality levels do not fall within the ranges listed in the table above: b) Operating the water heater in a corrosive or contaminated atmosphere, including without limitation damages, malfunctions or failures caused by lime, mineral

build-up, or scale.

c) Service trips to your business to teach you how to install, use, or maintain this water heater or to bring the water heater installation into compliance with local

building codes and regulations or manufacturer’s installation requirements. d) Water heater unit installed for use in: spa or pool heating; a recreational vehicle; a boat or any other watercraft. e) Water heater unit installed in any circulating system in which the temperature of the incoming water to the water heater is in excess of 140° f. f) Water heater unit that is installed in any installation supplying radiant heat, such as in floor, baseboard, radiators, snow melt or closed loop systems, or any

system using glycol or non-potable water. g) Damages, malfunctions or failures resulting from failure to install the water heater in accordance with applicable building codes/ordinances or good plumbing

and electrical trade practices. h) Damages, malfunctions or failures resulting from improper installation or failure to operate and maintain the unit in accordance with the manufacturer’s

instructions. i) Performance problems caused by improper sizing of the water heater or the gas supply line, the venting connection, combustion air openings, electric service

voltage, wiring, or fusing. j) Damages, malfunctions or failures caused by improper conversion from natural gas to LP gas or LP gas to natural gas fuel source. k) Damages, malfunctions or failures caused by operating the water heater with any parts removed or with modified, altered, or unapproved parts installed. l) Damages, malfunctions or failures caused by abuse, accident, fire, flood, freeze, lightning, acts of God and the like. m) Heat exchanger failures (leaks) caused by operating the water heater in a corrosive or contaminated atmosphere or damages, malfunctions or failures caused

by lime, mineral build-up, or scale. n) Damages, malfunctions or failures caused by operating the unit at water temperatures exceeding the maximum setting of the operating, or high limit, control. o) Heat exchanger failures caused by operating the water heater when it is not supplied with potable water, free to circulate at all times. p) Damages, malfunctions or failures caused by subjecting the heat exchanger to pressures, or firing rates, greater than those shown on the rating label. q) Damages, malfunctions or failures resulting from the use of any attachment, including any energy saving device, not authorized by Rheem. r) Units installed outside the fifty states (and the District of Columbia) of the United States of America and Canada. s) Units removed from the original installation location and reinstalled elsewhere. t) Units that have had their rating labels altered, tampered with, or removed. A water heater should not be operated if the rating label is removed.

WARRANTY

LABOR, SHIPPING, AND PROCESSING COSTS

For one (1) year after the Effective Date, Rheem will cover reasonable labor costs necessary to repair or replace a tankless water heater or component part that Rheem determines to be defective and covered by this Limited Warranty. The warranty service must be performed by a contractor that is licensed, state qualified, and trained to install and service Rheem's tankless water heaters. This Limited Warranty does not cover any labor expenses for general service, inspection, reinstallation, permits, removal and disposal of the failed water heater or defective component part(s), or updating the installation to meet manufacture or local code requirements. All such expenses are your responsibility.

Rheem will pay the transportation costs for an “in-warranty” replacement water heater, or “in-warranty” replacement component part(s), to a convenient delivery point (selected by Rheem) near the place the original water heater, or original component part(s), is located: such as a local water heater distributor. You must pay any local freight charges, including the cost of returning the failed water heater, or defective component part(s) to a convenient shipping location (selected by Rheem): such as a local Rheem distributor.

Rheem does not authorize, recommend, or receive any benefit from any claims processing or similar fees charged by others to process warranty claims for any water heater or component part(s). Rheem will not reimburse any party for these, or any other, fees not specifically covered in this Limited Warranty document.

HOW TO OBTAIN WARRANTY CLAIM ASSISTANCE

Any claim for warranty assistance must be made promptly. First, determine if your water heater is “in-warranty” (that is, within the Applicable Warranty Period). You can determine your unit’s warranty status by adding its Applicable Warranty Period to its date of installation. However, if you do not have documentary proof of your water heater’s date of installation, your unit’s warranty status will be based on its date of manufacture as determined from the serial number. Add the Applicable Warranty Period plus ninety (90) days to the date of manufacture to determine whether the water heater is still covered by this Limited Warranty. You may also determine your unit’s warranty status by obtaining the complete model number, complete serial number, and date of installation of your water heater and then accessing the “Warranty Verification” information on Rheem Water Heaters' internet website (www.rheem.com) or contacting Rheem's Claims Department (telephone (800) 621-5622) during normal business hours (in the Central Time Zone) to determine if the Applicable Warranty Period has expired. If your water heater is “in-warranty”, contact the plumber, or mechanical contractor, that installed it for assistance with the warranty repairs, or replacement, required. Rheem Water Heaters' Technical Service personnel are available to assist you (by telephone at (866) 720-2076) in obtaining “in-warranty” service or to answer your questions about the operation or repair of your water heater during normal business hours (in the Central Time Zone). Be prepared to provide the plumber, mechanical contractor, or Rheem Technical Service person you call with the complete model number, the complete serial number, and the date of installation of your water heater in addition to an explanation of your water heater problem. If an exact replacement is not available, Rheem will provide you with the current model of your water heater, or component part(s), or a replacement unit with comparable operating features. If government 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 defective component part(s), you will be charged for the difference in price represented by those required features. If you pay the price difference for those required features and/or to upgrade the size and/or other features available on a replacement new water heater, you will also receive a complete new Limited Warranty (with the full Applicable Warranty Period) for the replacement new water heater. Rheem reserves the right to inspect, or require the return of, the failed water heater or the defective component part(s). Each “in-warranty” failure water heater must be made available to Rheem (with the rating label and all the component parts intact) in exchange for the replacement water heater. Each defective “in-warranty” component part to be replaced must be returned to Rheem in exchange for the replacement component part. Warranty compensation is subject to validation of “in-warranty” coverage by Rheem Claims Department personnel.

• To obtain warranty compensation for an “in-warranty” water heater failure, you must provide Rheem with the failed water heater (with the rating label and all the component parts intact) the complete model number and the complete serial number of the Rheem or Ruud water heater that replaced the failed unit; and the date the original water heater failed. You may also be required to provide documentary proof of the failed water heaters date of installation to establish its “in-warranty” status.

• To receive warranty compensation for an “in-warranty” defective component part, you must provide Rheem with: the defective component part; the complete model number and the complete serial number of the Rheem or Ruud water heater from which the defective component part was removed; and the date the defective component part failed. You may also be required to provide documentary proof of the date of installation of the Rheem or Ruud water heater from which the defective part was removed – or the date of purchase of the part (If it was purchased separately) – to establish the “in-warranty” status of the defective component part.

• If Rheem determines that the water heater or component part returned to Rheem is free of defects in material and manufacture and/or that it was damaged by improper installation or other cause not covered by this Limited Warranty, the warranty claim for the product, component part and/or labor maybe denied. Warranty claim documentation should be mailed promptly to Rheem Water Heaters, Claims Department, 1241 Carwood Court, Montgomery, Alabama 36117, or in Canada, 125 Edgeware Rd. Unit 1, Brampton, ON, Canada L6Y 0P5

EXCLUSIVE WARRANTY – LIMITATION OF LIABILITY

THIS LIMITED WARRANTY IS THE SOLE AND EXCLUSIVE WARRANTY PROVIDED IN CONNECTION WITH THIS RHEEM®, RUUD®, RICHMOND®, PALOMA® AND SURE COMFORT® RESIDENTIAL TANKLESS GAS WATER HEATER UNIT (THE “WATER HEATER”). No one is authorized to make any other warranties on behalf of Rheem. ANY IMPLIED WARRANTIES, INCLUDING MERCHANTABILITY, OR FITNESS FOR A PARTICULAR PURPOSE, SHALL NOT EXTEND BEYOND THE APPLICABLE WARRANTY PERIODS, SPECIFIED PREVIOUSLY. RHEEM’S SOLE LIABILITY, WITH RESPECT TO ANY DEFECT, SHALL BE AS SET FORTH IN THIS LIMITED WARRANTY, AND ANY CLAIMS FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES (INCLUDING DAMAGE FROM WATER LEAKAGE) ARE EXCLUDED. Some states do not allow limitations on how long an implied warranty lasts, or for the exclusion of

incidental or consequential damages, so the above limitations or exclusions may not apply to you.

This Limited Warranty gives you specific legal rights, and you may also have other rights, which vary from state to state.

DO NOT RETURN THIS WATER HEATER OR PART TO RHEEM WITHOUT A RETURN AUTHORIZATION.

This document is for reference only and does not replace the original warranty document found in the back of the Use and Care manual provided with the tankless water heater.

DO NOT RETURN THIS DOCUMENT TO RHEEM. KEEP IT WITH YOUR WATER HEATER OR BUSINESS RECORDS.

Name of Owner:_______________________________________________________________________________________________________________

Owner’s Address:_______________________________________________________________________________________________________________

Name of Plumber/

Mechanical Contractor – Installer:__________________________________________________________________________________________________

Address of Plumber/

Mechanical Contractor – Installer :_________________________________________________________________________________________________

Telephone Number of Plumber/

Mechanical Contractor – Installer:_________________________________________________________________________________________________

Date of Water Heater Installation:__________________________________________________________________________________________________

Model Number of Your Water Heater:_______________________________________________________________________________________________

Serial Number of Your Water Heater:_______________________________________________________________________________________________

Rheem RTG84XLP1, RTG95XLP1 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual