Rheem RTGH-SR11I User Guide

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Page 1

CONDENSING TANKLESS WATER HEATER

CERTIFIED

USE AND CARE MANUAL

WITH INSTALLATION INSTRUCTIONS FOR THE INSTALLER

Condensing 199,900 Btu/hr, 180,000 Btu/hr and 157,000 Btu/hr Models

ULTRA

www.ahridirectory.org

Low NOx

Emissions

SCAQMD Rule 1146.2

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.

Print 2D

Bar Code

Here

What to Do If You Smell Gas

• 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.

AP22745 Rev 03

Page 2

CONTENTS

Important Safety Information

Safety Precautions �� 2–8

Product Information

Product Information �� 8 Specifications �� 9, 10 Pressure Drop Diagram ��11 Typical Piping Diagram �� 12-14

Installation Instructions

Safety

Standards Compliance ��16 Choosing a Location ��16, 17 Product Inspection ��18 Water Heater Installation��18–20 Mounting the Water Heater ��21 Venting ��22–41 Multiple Unit Controls ��42,43 Manifolded Water Heater with Recirculation Setup��44 Water Quality/Supply �� 45-49 Condensate ��49 Gas Supply �� 50-55 Electrical Wiring ��55 Wiring Diagram ��56 Insulation Blankets & Installation Precaution��57 Piping for Space Heaters ��58

Recirculation Control ��59-61 Service Alert �� 62 High Altitude Adjustments �� 63 Installation Checklist �� 64

Using Your Water Heater

Activating the Water Heater ��65-67 Setting the Water Temperature ��68-71 Recirculation Setting �� 72-75 WiFi Setting �� 76, 77 Water Saving Control �� 78, 79

Caring for Your Water Heater

Water Heater Inspections �� 80, 81 Care and Cleaning �� 82, 83 Preventive Maintenance �� 84 Draining the Water Heater��85–87 Flushing of the Heat Exchanger �� 87, 88 Freeze Protection �� 89 Vacation and Extended Shutdown �� 90 Troubleshooting Chart �� 90, 91 Service Error Code Chart �� 92, 93

If You Need Service

Call for Assistance �� 93 Parts Ordering �� 94-95

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:

WARNING:

An imminently hazardous situation that will result in death or serious injury.

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

WARNINGS:

• 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:

NOTICE:

A potentially hazardous situation that may result in minor or moderate injury.

Attention is called to observe a specified procedure or maintain a specific condition.

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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 the vent and the air supply piping is properly installed and terminated to the outdoors.

• Be sure to inspect the vent terminal, the air intake, and the 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 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 property damage. See page 17 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 manufacturer-approved

Schedule 40 PVC (foam core is not permitted at any time), Schedule 80 PVC, CPVC, ABS, UL 1738-listed Category III Stainless Steel, or PP. No other vent material is permitted. For Canada, installations must follow ULC S636 for exhaust venting.

• 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 may result in severe damage to the structure or exterior finish of the building.

• For multiple-unit installation, a minimum distance between vent terminations must be maintained to prevent recirculation of vent gases. See page 38 for information on venting and clearances to multiple terminations.

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.

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 glued and attached to the vent connection on the top of the water heater. DO NOT USE SCREWS.

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

Safety

Page 4

IMPORTANT SAFETY INFORMATION

Water Supply Safety

DANGERS:

• WATER TEMPERATURE SETTINGS

Safety

– 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°F (52°C) can cause severe burns instantly or death from scalds.

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

See instruction manual before setting temperature at water heater.

Feel water before bathing or showering.

Temperature limiting valves are available, see manual.

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 "Draining the Water Heater" can cause serious personal injuries from scalding and/or damage the water heater.

D ANGER

HOT

BURN

Time/Temperature Relationship in Scalds

Water Temperature Time to Produce 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 (Reference only)

85 100 102 104 106 108 110 112 114 116 118 120 125 130 140 °F 29 38 39 40 41 42 43 44 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.

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 control. Only qualified service personnel should perform this adjustment. Only factory-authorized control should be used.

Page 5

IMPORTANT SAFETY INFORMATION

Natural Gas and Liqueﬁed Petroleum Safety

DANGERS:

• Never attempt to convert the water heater from natural gas to LP except the conversion following “Fuel Conversion Instructions” supplied with the water heater. The water heater must 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 in terms of orifice size and a gas chip. A natural gas water heater will not function safely on LP and vice versa.

• 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, solvents, 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.

– 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.

WARNINGS:

• The installation of gas piping must comply 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/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, heater 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.

Safety

Page 6

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

Safety

water heater, resulting in death, personal injury, or property damage. Should you have any problems reading or following the instructions in this manual, STOP and get help from a qualified service technician.

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.

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. .

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

Page 7

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, heater 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 916-4458100 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

Page 8

IMPORTANT SAFETY INFORMATION

General Installation and Maintenance Safety

WARNINGS:

• This water heater must be installed in 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.

• 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.

SAVE THESE INSTRUCTIONS

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 shutoff 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.

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

Product Information Safety

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 93 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 this Use and Care Manual. 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.

Pre operating 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?

Page 9

PRODUCT INFORMATION

(440 mm)

(170 mm)

(116 mm)

(899 mm)

(459 mm)

(440 mm)

(170 mm)

(116 mm)

(899 mm)

(459 mm)

2" (51 mm)

5" (127 mm)

" (286 mm)

Hot Outlet

Fitting

Recirculation

Fitting

(Available only on

certain models)

Condensate

Drain

Cold Inlet

(333 mm)

(101 mm)

(348 mm)

(170 mm)

(135 mm)

Gas Supply Fitting

Speciﬁcations – Direct-Vent Models

(116 mm)

(899 mm)

TOP VIEW

(440 mm)

(170 mm)

(459 mm)

FRONT VIEW

Air Intake

Exhaust Vent

Product Information

(760 mm)

(128 mm)

(45 mm)

(726 mm)

(35 mm)

Gas Supply Fitting

(170 mm)

5" (127 mm)

2" (51 mm)

Hot Outlet

Fitting

BOTTOM VIEW

Condensate

Drain

(333 mm)

Recirculation

Fitting

(Available only on

certain models)

(101 mm)

Cold Inlet

Fitting

" (286 mm)

(135 mm)

(348 mm)

Page 10

PRODUCT INFORMATION

Speciﬁcations

English Rating Label

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

Product Information

M. Manifold Gas Pressure N. Certification Stamp P. Alternate Approval Stamp Q. Clearances

Inside of top panel

MODEL NO.

PWWYY00001 DIRECT-VENT AUTOMATIC INSTANTANEOUS WATER HEATER FOR INSTALLATION IN A MANUFACTURED

XXXXX

HOME (MOBILE HOME) OR RECREATIONAL VEHICLE" CSA/ANSI Z21.10.3 • CSA 4.3-2019 FOR INSTALLATION ONLY

TYPE OF GAS: GAS MAX. INLET GAS PRESSURE: "w.c. MIN. INLET GAS PRESSURE: "w.c. RECOVERY RATING: GALLONS/HR MAX. WORKING PRESSURE: 150 psi ELECTRICAL RATING: 120V 60HZ LESS THAN 2 AMPS

MAX. INPUT: BTU/HR, MIN. INPUT: BTU/HR, MANIFOLD PRESSURE: "w.c. (FOR MAX. INPUT)

This appliance must be installed in accordance with local codes or, in the absence of local codes, the National Fuel Gas Code. ANSI Z223.1/NFPA 54 or the CSA B149.1, Natural Gas and Propane Installation Code.

"Suitable for combination water(potable) heating and space heating and not suitable for space heating applications only." "The water heater shall not be connected to any heating system or component(s) previously used with a nonpotable water heating appliance"

"A pressure relief valve listed as complying with the Standard for Relief Valves and Automatic Gas Shutoff Devices for Hot Water Supply Systems, ANSI Z21.22 shall be installed at the hot water outlet connection of the water heater at the time of installation of the heater. Local codes shall govern the installation of relief devices. For safe operation of the water heater, the relief valve(s) must not be removed or plugged. No valve shall be placed between the relief valve and the water heater. The relief from the discharge of the pressure relief valve shall be disposed of in a suitable place where it will cause no damage. Also there shall be no other reducing coupling or other restrictions installed on the discharge line to restrict flow. See Installation Manual Heading, "PRESSURE RELIEF VALVES" for installation and maintenance of relief valve discharge line and other safety precautions." Turn off the electrical power and gas shutoff valve. Lift and release lever on the relief valve and check the manual operation of relief valve at least once a year." "Make certain the discharged water is directed to a suitable drain. Avoid contact with hot water and prevent water damage."

Complies with jurisdiction having 14 ng/J NOx regulations.

"MINIMUM CLEARANCE FROM COMBUSTIBLE OR NONCOMBUSTIBLE CONSTRUCTION: 1/2" SIDE CLEARANCE FROM FLANGED ENDS TO WALL; 0" REAR CLEARANCE-FROM MOUNTING BRACKET TO WALL; 12" TOP CLEARANCE-FROM TOP OF HEATER TO CEILING; 12" BOTTOM CLEARANCE-FROM BOTTOM OF HEATER TO FLOOR; 12" FRONT CLEARANCE)-FROM FRONT OF HEATER TO CLOSET DOOR" "NOTE: 24" MINIMUM RECOMMENDED FRONT CLEARANCE FOR SERVICE AND MAINTENANCE." "WIRING DIAGRAM BEHIND THE FRONT COVER."

FOR YOUR SAFETY : DO NOT STORE OR USE GASOLINE OR OTHER FLAMMABLE VAPORS AND LIQUIDS IN THE VICINITY OF THIS OR ANY OTHER APPLIANCE.

English/French Rating Label

INSIDE OF FRONT COVER

Page 11

PRODUCT INFORMATION

60 55 50 45 40 35 30 25 20 15 10

5 0

0.0 2.0 4.0 6.0 8.0 10.0 12.0

140

120

100

Pressure Drop (PSI)

Pressure Drop (ft of head)

Water Flow Rate (GPM)

199k Btu/h 180k Btu/h 157k Btu/h

Pressure Drop Curve

60 55 50 45 40 35 30 25 20 15 10

Pressure Drop (PSI)

5 0

0.0 2.0 4.0 6.0 8.0 10.0 12.0

Graph above generated at 35°F Delta T. Graph below generated with 70°F (21°C) inlet water temperature

199k Btu/h 180k Btu/h 157k Btu/h

Water Flow Rate (GPM)

140

120

100

Product Information

Pressure Drop (ft of head)

Temperature Rise Curve

199k Btu/h 180k Btu/h 157k Btu/h

12 11 10

9 8 7 6 5 4 3 2 1

Water Flow Rate (GPM)

0 20 40 60 80 100 120

Delta T - Temperature Rise (°F)

Page 12

PRODUCT INFORMATION

Typical Piping Diagram

Typical Direct-Vent Water Heater (No Recirculation)

(Shown Without Venting)

Gas

Product Information

Power

Supply

Cord

Supply

Right Side View

Relief Valve

Hot Water

To Suitable

Drain

Hot Water Outlet

Outlet

Service

Valve

To Hot Water

Faucet(s)

Manual Gas Supply Line Shut-Off Valve

Relief Valve

Sediment

Trap

Union

Cap

To Suitable

Drain

Service

Valves

To Suitable

Drain

User Interface

Condensate outlet

Inlet Water Fitting With Water Filter

Neutralizer

*Condensate Pipe

*Note: A flexible drain tube can be used

Cold Water Supply

Drain Valve

Page 13

PRODUCT INFORMATION

Typical Direct-Vent Water Heater (Recirculation via Dedicated Line)

(Shown Without Venting)

Gas Supply

User Interface

Power

Manual Gas Supply Line Shut-Off Valve

Supply

Cord

Union

Condensate outlet

Inlet Water Fitting With Water Filter

Product Information

Relief Valve

Sediment Trap

To Hot Water

Faucet(s)

Cap

Suitable

Drain

Drain Valve

Service Valves

Cold Water Supply

To Suitable Drain

Recirculation Return Line

Neutralizer

Condensate Pipe*

*Note: A flexible drain tube can be used

Expansion Tank

Page 14

PRODUCT INFORMATION

Typical Outdoor Water Heater

(Outdoor Conversion Kit Required - sold separately)

This converted outdoor water heater is for OUTDOOR installation only.

DANGER

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

Gas Supply

Power

Supply

Cord

To Hot Water

Faucet(s)

Manual Gas Supply Line Shut-Off Valve

Relief Valve

Sediment Trap

Union

Cap

To Suitable

Drain

Service

Valves

Neutralizer

To Suitable

Drain

Condensate outlet

Inlet Water Fitting With Water Filter

Condensate Pipe*

*Note: A flexible drain tube can be used

Cold Water Supply

Drain Valve

Page 15

INSTALLATION

Installation

INSTRUCTIONS

FOR THE

CONTRACTOR

Page 16

INSTALLATION INSTRUCTIONS

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 20001, as ANSI standard Z223.1, or National Fire Protection

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.

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.

A copy can be purchased from; Canadian Standards Association, 5060 Spectrum Way, Mississauga, ON L4W 5N6

NOTICE:

This water heater should not be located in an area where water 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.

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 exhaust and air intake. This minimizes the vent length and the number of elbows and joints required for venting.

• The water heater should be installed with the correct venting and exhaust materials. See "Venting" on this Use and Care Manual.

12"

(300 mm)

Minimum

Air Intake Pipe

Exhaust Vent Pipe

Upward Slope to Termination

0" min.

(0 mm)

Page 17

INSTALLATION INSTRUCTIONS

12" min.

(300 mm)

1/2" min. (13 mm)

12" min.

(300 mm)

(0 mm)

0" min.

(0 mm)

Sealing Plate

Choosing a Location (cont.)

• Every vent or air intake pipe penetration of a floor

or ceiling should be sealed.

• Failure to install and properly vent the water heater to the outdoors as outlined on "Venting" 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 and front. – 0 in. (0 cm) for rear with support bracket(s) – 12 in. (30 cm) from the bottom and top

– 0 in. (0 cm) for vent or air intake pipe

• 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.

• Manufactured home approved.

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

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

• DO NOT install the water heater in a boat, or other watercraft.

NOTICE:

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

• DO NOT install the water heater near vents for heating and cooling unless a minimum clearance of 4 ft (1.2 m) is maintained.

Page 18

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

Included Items

Screws

Some Models Only

NAT LP

Verify that all included supplied parts are present as shown.

Mounting Bracket

Washers

Cross Over Valve

LP Gas Conversion Kit

Water Heater Installation

Corrosive Atmosphere

NOTICE:

The water heater should not be installed near an air supply containing halogenated hydrocarbons where contaminants can enter the combustion air supply.

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.

Service valve

Pressure Relief Valve

The air supply containing halogenated hydrocarbons is 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.

for cold water

Service valve

for hot water

NOTICE:

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

Page 19

INSTALLATION INSTRUCTIONS

Factory Settings

The default settings of this water heater are as follows:

FACTORY SETTINGS

Set temp. 120°F

Recirc Pump Mode None

Manifold Heaters 1

Water Saver Mode OFF

Elevation Sea Level

TemP. Unit Fahrenheit

Service Alert OFF

Beep on Alarm OFF

Display DISABLED

Start/Adjust

Page 20

INSTALLATION INSTRUCTIONS

Water Heater Installation (cont.)

General

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

Wall Plate

(Recommended)

90° Elbow

Air Intake

Pipe

Upward Slope to

outside termination

Exhaust Vent Pipe

Outside Wall

Power Supply Cord

Manual Gas Supply Line

Shut-Off Valve

To Hot Water Faucets

Drain Valve

Sediment Trap

Cap

To Suitable

Drain

Service Valve

(supplied)

Cold Water

Supply Line

Condensate Drain*

*Note: A ﬂexible drain tube can be used.

To Suitable

Drain

Page 21

INSTALLATION INSTRUCTIONS

Mounting the Water Heater

CAUTION:

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

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

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 of the wall. Use wood screws to secure brackets to wall. If mounting to a concrete wall, use lag bolts designed for concrete.

General

Attach the mounting bracket to the wall and secure it by 4 screws and washers. Make sure it is level.

Align the grooves on the back of the water heater with the tongues on the mounting bracket and hang the water heater on the bracket. When mounted with the mounting bracket, the water heater will have a 5/8" (16 mm) clearance from the back of the wall. Using two screws and washers , secure the lower mounting bracket to the wall.

Make sure the proper electrical outlet or supply (120 VAC/60 Hz) is available and located near the unit. All models come with a 6-ft. (1.8 m) power cord.

NOTE:

Outdoor installations require hard-wiring, consult instructions in the Outdoor Conversion Kit (sold separately) before mounting.

Page 22

INSTALLATION INSTRUCTIONS

Venting for Direct-Vent Water Heater

Venting

DANGER:

Failure to 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. This water heater must have air supply connected and terminated to the outdoors for direct vent application. Combustion air requirements of room air application shall follow “Room Air Application” in this Use and Care Manual.

WARNING:

Refer to page 17 for required clearances to combustible materials. Improper clearances can cause explosion or fire resulting in death, personal injury, and/or product damage.

CAUTIONS:

•

Check to make sure flue gases DO NOT recirculate into the air intake terminal when using direct venting. If the water heater is having service issues, flue recirculation may be a contributing factor.

• Even when the minimum vent terminal separation distances are followed, recirculation may still occur depending upon the location outside the building, the distance from other buildings, proximity to corners, weather conditions, wind patterns, and snow depth.

• Periodically check to make sure that flue recirculation is not occurring. Signs of flue gas recirculation include frosted or frozen intake terminals and condensate in the intake terminal and venting system.

• Correction to flue recirculation may involve angling the intake away from the exhaust terminal and increasing the distance between them. Check to be sure the intake and exhaust terminals are not obstructed, especially during periods of below-freezing weather.

Venting Requirements

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

The vent exhaust and air intake shall terminate outside as described in these instructions for direct vent application. Combustion air requirements of room air application shall follow “Room Air Application” in this Use and Care Manual. DO NOT vent this water heater through a chimney. It must be vented separately from all other appliances.

NOTICE:

The unit can be vented using only the following approved vent pipe material.

Use only 2 or 3 inch diameter pipe. Refer to local codes for restrictions on the use of InnoFlue® PP, PVC, CPVC, or ABS pipe and fittings. All exhaust venting materials for product installed in Canada must meet ULC-S636.

The use of cellular core PVC (ASTM F891), cellular core CPVC, or Radel® (polyphenolsulfone) in nonmetallic venting systems is prohibited and that covering non-metallic vent pipe and fittings with thermal insulation is prohibited.

This water heater requires a special venting system. Refer to venting supplier’s instruction for complete parts list and method of installation. The manufacturers and product lines listed on the following tables have been tested and authorized to safely operate with Rheem tankless water heater.

Approved Vent Materials, Fittings and Terminations:

CPVC

Schedule 40, ASTM F-441

Schedule 40, ASTM F-441, and CPVC 4120, ASTM-D2846

Schedule 40, ASTM F-438

Acceptable Materials for Exhaust

Acceptable Materials for Air Intake

Fittings

Terminations (Manufactured by Polytech)

PVC

Schedule 40, ASTM D-1785

Schedule 40, ASTM D-1785, and DWV, ASTM-D2665

Schedule 40, ASTM D-2665

RXGY-G01

RXGY-G02

RXGY-G02C, RH140, RH17*

RXGY-E03A

RXGY-G01C

* Can be 1 throught 9.

ABS is not permitted for exhaust vent in Canada

Approved Polypropylene Vent Manufacturer/Trade Name:

Manufacturer

Trade Name

Single Wall Pipe

Elbow

Adapter

Non-Return Valve (NRV)

Siphon

Termination

Centrotherm

InnoFlue®

ISVL**** or ISVL****UV

ISELS****ISELL**** or ISELL****UV

ISAAL0202

ISNRV****

IASJBVS

ISLPT**** or ISTT****

ABS

Schedule 40, ASTM D-2661

*Refers to variations in nominal size.

Page 23

INSTALLATION INSTRUCTIONS

Venting for Direct-Vent Water Heater

DO NOT USE Schedule 20, Cell Core, Drain Pipe, Galvanized, Aluminum or B-Vent.

InnoFlue®Flex vent is allowed to be used up to 50 ft (15.2 m) only when it is installed vertically or within 45 degree from perpendicular direction. DO NOT use InnoFlue®Flex vent for any other installation, or any other flexible vent. Refer to manufacturer’s instruction for details.

Vent

System

Diameter

Inches Feet Meters Feet Meters

2 1 0�3 70 21�3 90° Elbow

3 1 0�3 150 45�7 90° Elbow

Min. Allowed Equivalent

Vent Length

Vent Lengths and Control Adjustments

Before starting the vent installation, careful planning should be given to the routing and termination of the vent pipes. The length of the vent pipes (inlet and outlet) should be kept to a minimum. Also, see pages 25–26 and 30 for vent terminal placement. Refer to the maximum and minimum vent length charts for the pipe sizes that can be used and the total equivalent length of pipe that can be used. DO NOT exceed equivalent length of pipe in maximum vent length chart.

Max. Allowed Equivalent

Vent Length

Vent

System

Termination

Venting

The vent termination is not included in the equivalency calculations.

NOTICE: A 90°, ¼ standard bend or long bend elbow is equivalent to 6 ft. (1.83 m) of straight pipe. A 45°, 1/8 standard bend or long bend elbow is equivalent to 2.5 ft. (0.76 m) of straight pipe. A 90°, short bend radius elbow is equivalent to 12 ft. (3.66 m) of straight pipe.

DO NOT use unequal diameters of pipe and fittings for the vent system.

See examples below.

Elbow Examples

Short Bend 90° Elbow

OK to Use

Standard Bend 90° Elbow

OK to Use

Long Bend 90° Elbow

OK to Use

Page 24

INSTALLATION INSTRUCTIONS

Venting for Direct-Vent Water Heater

NOTICE:

To use 3" vent pipe, an increasing adapter will be required.

WARNING:

To use Category III Stainless Steel, a proper transition part will be required to prevent flue gas from leaking.

Depending on the size of pipe that is chosen for venting the water heater, it might be necessary to use a fitting for stepping down in pipe size, to connect to the water heater.

All intake and exhaust venting components must have the same diameter size. DO NOT use a different size on the intake and exhaust venting.

The unit may be vented horizontally through a wall or vertically through the roof. Pipe runs must be adequately supported along both vertical and horizontal runs. Maximum unsupported span is recommended to be no more than 4 feet (1.2 m). It is imperative that the first hanger be located on the horizontal runs immediately adjacent to the first 90-degree elbow from the vertical rise. Only use support isolation hanging bands. DO NOT use wire to support pipe runs.

Stress levels in the pipe and fittings can be significantly increased by improper installation. If rigid pipe clamps are used to hold the pipe in place, or if the pipe cannot move freely through a wall penetration, the pipe may be directly stressed, or high thermal stresses may be formed when the pipe heats up and expands. Install accordingly to minimize such stresses.

NOTICES:

• It is recommended that the air intake pipe and exhaust pipe have a 1/4" per foot upward slope toward the outdoors.

• Maintain the proper clearance between the vent pipe and combustible or noncombustible materials as described on page 17.

• A clearance of 0 in. (0 cm) is allowed between the vent or air intake pipe and combustible material.

• Use proper support for the vent and air intake pipes.

• It is recommended the support method used isolates the vent pipe from floor joists or other structural members. This helps prevent transmission of noise and vibration.

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

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 next page for additional requirements for the Commonwealth of Massachusetts.

Page 25

INSTALLATION INSTRUCTIONS

Venting for Direct-Vent Water Heater

In the Commonwealth of Massachusetts

The Commonwealth of Massachusetts requires compliance with regulation 248 CMR 4.00 and

5.00 for installation of through-the-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 back-draft.

(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 sidewall, horizontally vented, gas-fueled equipment, the installing plumber or gas fitter 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 gas fitter 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, gasfueled equipment is installed in a crawl space or an attic, the hard-wired 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, gas-fueled 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 side-wall, 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 productapproved 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

Page 26

Regulator vent outlet in the event no

INSTALLATION INSTRUCTIONS

Venting for Direct-Vent Water Heater

Inside

corner detail

15 ft

Venting

Fixed

closed

Operable

regulator is present, H and I can be disregarded.

AREA WHERE TERMINAL IS NOT PERMITTED

VENT TERMINAL

Fixed

closed

Operable

AIR SUPPLY INLET

Horizontal Vent Terminal Location for Direct Vent

The following information should be used for determining the proper location of the vent terminal for direct vent water heaters.

Canadian Installations

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

balcony.

• 6 in (15 cm) for appliances ≤ 10,000 Btuh

B= Clearance to window or door that may be

opened.

C= Clearance to permanently closed window.

D= Vertical Clearance to ventilated soffit located

above the terminal within a horizontal distance of 2 feet (61 cm) from the center line of the terminal.

E= Clearance to unventilated soffit. 12 in (30 cm) 12 in (30 cm)

F= Clearance to outside corner. 24 in (61 cm) 24 in (61 cm)

G= Clearance to inside corner. 18 in (46 cm) 18 in (46 cm)

H = Clearance to each side of center line extended

meter/regulator assembly. above

I = Clearance to service regulator vent outlet. 3 feet (91 cm) 3 feet (91 cm)

(3 kW),

• 12 in (30 cm) for appliances > 10,000 Btuh

(3 kW) and ≤ 100,000 Btuh (30 kW),

• 36 in (91 cm) for appliances > 100,000 Btuh (30 kW)

3 feet (91 cm) within a height 15 feet (4.6 m) 3 ft (91 cm) within a height of 15 ft (4.6 m)

• 6 in (15 cm) for appliances ≤ 10,000 Btuh

J = Clearance to nonmechanical air supply inlet to

building or the combustion air inlet to any other appliance..

(3 kW),

• 12 in (30 cm) for appliances > 10,000 Btuh

(3 kW) and ≤ 100,000 Btuh (30 kW),

• 36 in (91 cm) for appliances > 100,000 Btuh (30 kW)

12 inches (30 cm) 12 inches (30 cm)

0 in (0 cm) 0 in (0 cm)

12 in (30 cm) 12 in (30 cm)

4 feet (1.2 m) below or to side of opening; 1 foot (300 mm) above opening.

4 feet (1.2 m) below or to side of opening; 1 foot (300 m) above opening.

US Installations

K = Clearance to mechanical air supply inlet.

L = Clearance above paved side walk or paved

driveway located on public property.

M = Clearance under veranda, porch, deck or

balcony.

1 In accordance with current CAN/CSA-B149.1, Natural Gas and Propane Installation Code. 2 In accordance with current ANSI Z223.1/ NFPA 54 National Fuel Gas Code. ‡ Permitted only if veranda, porch, deck, or balcony is fully open on a minimum of two sides beneath the floor.

6 feet (1.83 m)

7 feet (2.13 m)+

12 in (30 cm)‡ 12 in (30 cm)‡

3 feet (91 cm) above if within 10 feet (3 m) horizontally.

7 ft (2.13 m) for mechanical draft system (Category I appliances); vents for Category II and IV appliances cannot be located above public walkways or other areas where condensate or vapor can cause a nuisance or hazard

Page 27

Regulator vent outlet in the event no

INSTALLATION INSTRUCTIONS

Venting for Other Than Direct-Vent Water Heater

Inside

corner detail

15 ft

Fixed

closed

Operable

regulator is present, H and I can be disregarded.

AREA WHERE TERMINAL IS NOT PERMITTED

VENT TERMINAL

Fixed

closed

Operable

AIR SUPPLY INLET

Horizontal Vent Terminal Location for Other than Direct Vent

The following information should be used for determining the proper location of the vent terminal for direct vent water heaters.

Canadian Installations

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

balcony.

• 6 in (15 cm) for appliances ≤ 10,000 Btuh

B= Clearance to window or door that may be

opened.

C= Clearance to permanently closed window.

D= Vertical Clearance to ventilated soffit located

above the terminal within a horizontal distance of 2 feet (61 cm) from the center line of the terminal.

E= Clearance to unventilated soffit. 12 in (30 cm) 12 in (30 cm)

F= Clearance to outside corner. 24 in (61 cm) 24 in (61 cm)

G= Clearance to inside corner. 18 in (46 cm) 18 in (46 cm)

H = Clearance to each side of center line extended

meter/regulator assembly. above

I = Clearance to service regulator vent outlet. 3 feet (91 cm) 3 feet (91 cm)

(3 kW),

• 12 in (30 cm) for appliances > 10,000 Btuh

(3 kW) and ≤ 100,000 Btuh (30 kW),

• 36 in (91 cm) for appliances > 100,000 Btuh (30 kW)

3 feet (91 cm) within a height 15 feet (4.6 m) 3 ft (91 cm) within a height of 15 ft (4.6 m)

• 6 in (15 cm) for appliances ≤ 10,000 Btuh

J = Clearance to nonmechanical air supply inlet to

building or the combustion air inlet to any other appliance..

(3 kW),

• 12 in (30 cm) for appliances > 10,000 Btuh

(3 kW) and ≤ 100,000 Btuh (30 kW),

• 36 in (91 cm) for appliances > 100,000 Btuh (30 kW)

12 inches (30 cm) 12 inches (30 cm)

0 in (0 cm) 0 in (0 cm)

12 in (30 cm) 12 in (30 cm)

• 6 in (15 cm) for appliances ≤ 10,000 Btuh

(3 kW),

• 12 in (30 cm) for appliances > 10,000 Btuh

(3 kW) and ≤ 100,000 Btuh (30 kW),

• 36 in (91 cm) for appliances > 100,000 Btuh (30 kW)

• 6 in (15 cm) for appliances ≤ 10,000 Btuh

(3 kW),

• 12 in (30 cm) for appliances > 10,000 Btuh

(3 kW) and ≤ 100,000 Btuh (30 kW),

• 36 in (91 cm) for appliances > 100,000 Btuh (30 kW)

US Installations

Venting

K = Clearance to mechanical air supply inlet.

L = Clearance above paved side walk or paved

driveway located on public property.

M = Clearance under veranda, porch, deck or

balcony.

6 feet (1.83 m)

7 feet (2.13 m)

12 in (30 cm)‡ 12 in (30 cm)‡

3 feet (91 cm) above if within 10 feet (3 m) horizontally.

Page 28

Rising moisture will collect under eaves.

Inside

Corner

Caulk

If sot vent is too close, block o 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)

5.5”to 24 “

(14 cm to 61cm)

Rising moisture will collect under eaves.

12”

(300 mm)

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)

INSTALLATION INSTRUCTIONS

Venting for Direct-Vent Water Heater (cont.)

Horizontal Vent Considerations

Venting

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, 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, as

flue gasses may damage them. A minimum distance of 4 ft. (1.22 m) is recommended.

– 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 installations, a minimum distance between vent terminations must be maintained to prevent recirculation of vent gases. Maintain a center-to-center distance between each pair of vent terminations as listed below:

24 in. (61 cm) for a two-unit installation;

– DO NOT terminate vent directly on brick or masonry

surfaces. Use rust-resistant, sheet-metal backing plate behind the vent.

– The vent for this appliance shall not terminate

• Over public walkways; or

• Near soffit vents or crawl space vents or other area where condensate or vapor could create a nuisance or hazard or cause property damage; or

• Where condensate or vapor could cause damage or could be detrimental to the operation of regulators, relief valves, or other equipment.

– 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.

– Observe minimum clearances. Vent terminals must be a

minimum of 6 inches (17 cm) and a maximum of 24 inches (61 cm) apart horizontally.

Outdoor Tankless Water Heaters

– Install outdoor water heater such that air inlet and flue

outlet are above anticipated snow level.

24 in. (61 cm) and 36 in. (91.4 cm) for a three-unit installation;

24 in. (61 cm), 36 in. (91.4 cm), and 24 in. (61 cm) for a four-unit installation.

Page 29

Wall Plate

(recommended)

INSTALLATION INSTRUCTIONS

12” (30 cm)

Minimum

Exhaust Vent Pipe

Inspection

Access Panel

(Optional)

Upward Slope to Termination

Air Intake Pipe

Ceiling

Inspection

Access Panel

(Optional)

Horizontal Vent Installation

WARNING:

Danger of fire or bodily injury – Solvent cements and primers are highly flammable. Provide adequate ventilation and DO NOT assemble near heat source or open flame. DO NOT smoke. Avoid skin or eye contact. Observe all cautions and warnings on material containers.

CAUTION:

Use tankless water heater manufacturer-approved Schedule 40 PVC (foam core is not permitted at any time), Schedule 80 PVC, CPVC, ABS or UL 1738-listed Category III Stainless Steel or PP. No other vent material is permitted. For Canada, installations must follow ULC S636 for exhaust venting.

Joining Pipes and Fittings

All pipe, fittings, solvent cement, primers, and procedures, for the U.S., must conform to American National Standards Institute and American Society for Testing and Materials (ANSI/ASTM) standards. For Canada, all pipe, fittings, solvent cement, primers, and procedures must conform to ULC-S636 and vent manufacturer specifications.

CAUTIONS:

• DO NOT use solvent cement that has become curdled, lumpy, or thickened.

• DO NOT thin solvent cement. Observe shelf precautions printed on the containers.

• For applications below 32°F, use only lower temperaturetype solvent cement.

• Appropriate solvent and cleaner must be used for the type of vent pipe used (PVC, CPVC, or ABS).

Venting

Cleaner-Primer and Medium-Body Solvent Cement

All joints in vent piping must be properly sealed, and we recommend using the following material:

PVC materials should use ASTM D-2564-grade cement.

CPVC materials should use ASTM F-493-grade cement.

ABS materials should use ASTM D-2235-grade cement (ABS is not allowed for exhaust vent in Canada).

Cementing Joints

1. Cut pipe end square; remove jagged edges and burrs. Chamfer end of pipe and clean fitting socket and pipe joint area of all dirt, grease, or moisture.

2. After checking pipe and socket for proper fit, wipe socket and pipe with cleaner-primer. Apply a liberal coat of primer to inside surface of socket and outside of pipe.

3. Apply a thin coat of cement evenly in the socket. Quickly apply a heavy coat of cement to the pipe and insert pipe into fitting with a slight twisting motion until it bottoms out.

4. Hold the pipe fitting for 30 seconds to prevent the tapered socket from pushing the pipe out of the fitting.

5. Wipe all excess cement from the joint with a rag. Allow 15 minutes before handling. Cure time will vary according to fit, temperature, and humidity.

NOTICE:

• Cement must be fluid; if not, recoat with fresh cement.

• Stir the solvent frequently while using. Use a natural

bristle brush or the dauber supplied with the can. The proper brush size is one inch.

• DO NOT use cement for PP. For proper installation of PP

vent, follow manufactures instrucions.

Page 30

INSTALLATION INSTRUCTIONS

Venting for Direct-Vent Water Heater (cont.)

Horizontal Vent Installation (cont.)

Fasteners will vary depending on the wall type.

For particle board or

composite sheathing, use 6 hollow wall anchors. The anchors should be at least 1/8 in. (0.3 cm) in diameter and the appropriate length

Venting

for the sheathing thickness.

For plywood or solid wood

sheathing or members, use 6 #10 x 1 1/4-in. wood screws.

For masonry walls, use

suitable masonry anchors long enough to pass through the wall.

Apply silicone sealant or silicone/latex caulk to seal the vent pipe to the vent coupling to permit field disassembly for annual inspection and cleaning. Completely seal where it passes through the wall plate and where it is attached to the structure.

NOTICE:

• The exhaust vent terminal must extend a minimum of 12 inches (30.5 cm) more than the air intake terminal from the exterior wall. Also, an edge to edge distance between an air intake termination and an exhaust termination shall be at least 12 inches (30.5 cm) for any directions to prevent recirculation of vent gases.

• To prevent possibility of condensate freeze-up, DO NOT install vent one above the other or above air intake termination.

Once the vent terminal location has been determined, make holes through the exterior wall to accommodate the vent pipes. Vent pipes must exit exterior wall horizontally only.

The standard horizontal air intake termination is a 2-inch or 3-inch 90 degree elbow. This prevents rain or any other liquid for getting into air intake and the pipe from being pushed back into the structure. The standard horizontal exhaust outlet termination is a 2-inch or 3-inch pipe which terminates 12 inches from the air intake termination. Insert a small length of vent pipe through the wall and connect the coupling. Connect vent cap or terminal to the vent pipe on the exterior of the building.

1. Observe minimum clearances. Vent terminals must

be a minimum of 6 11/16 inches (17 cm) and a maximum of 24 inches (61 cm) apart horizontally.

2. Cut two 2 1/2” (6.4 cm) diameter holes [for a 2”

(5.1 cm) diameter pipe] or 3 1/2” (8.9 cm) diameter holes [for a 3” (7.6 cm) diameter pipe] for the vent exhaust and air intake openings.

Attach the female end of the next vent pipe section to the male end of the 2-in./3-in. (5.1-cm/7.6-cm) vent pipe. See “Cementing Joints” on this Use and Care Manual.

2” PVC pipes

Locking bands

Insert a 2" PVC pipes slowly into an air intake connector and a flue connector located on top of the water heater until they stop. DO NOT use cement.

Tighten 2 locking bands to secure 2" PVC pipes.

Complete the rest of the vent pipe installation to the water heater's vent exhaust and air intake.

Page 31

from wall

is recommended

Upward Slope to Termination

Exhaust Vent

Pipe

Air Intake

Pipe

Inspection

Access Panel

(Optional)

Inspection

Access Panel

(Optional)

Ceiling

Flat

Termination

Kit

Air Intake

Vent

Exhaust

Exhaust Vent

Pipe

Air Intake

Pipe

Inspection

Access Panel

(Optional)

Inspection

Access Panel

(Optional)

Ceiling

Upward Slope to Termination

INSTALLATION INSTRUCTIONS

For information about termination kits, refer to "If You Need Service" on page 93, "Call for Assistance" for the telephone number to speak to a Customer Service Representative.

Alternative Horizontal Vent Installations

Alternative horizontal vent termination kits are commercially available. Please refer to the instruction sheet packaged with the kit for complete installation instructions.

Concentric Vent Termination Kit

NOTE:

Concentric venting installations may vary pending condensate management. Consult local and regional venting codes.

Venting

Flat Horizontal Termination Kit

(this termination can be rotated)

Front View

Option 1

Terminal assemblies to be parallel to wall�

Short piece of pipe

12 in�

(30�5 cm)

min�

Exhaust

Vent

Terminal

Optional vent diagram (no kit required)

NOTE:

It is recommended to install exhaust termination higher than air intake to prevent moisture from entering intake pipe.

Combustion

Air-Inlet

Terminal

Terminal assemblies to be parallel to wall�

Exhaust

Vent

Terminal

Front View

Option 2

Short piece of pipe

(30�5 cm) min�

12 in�

Side View

Termination Openings - 12 in� (30�5 cm) min� above grade or anticipated snow level

Combustion

Air-Inlet

Terminal

Page 32

Hole

Through Roof

Hole

Through Ceiling

A, B

INSTALLATION INSTRUCTIONS

Venting for Direct-Vent Water Heater (cont.)

Vertical Vent Installation

NOTICE:

Venting

WARNING:

Improper vent installation can result in death, personal injury, product damage, and/or poor performance.

NOTICE:

Only Rheem-approved AND for Canada it has tube ULC S636 approved termination and parts must be used during installation.

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

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 32 for clearance requirements.

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

2” PVC pipes

Locking bands

Insert a 2" PVC pipes slowly into an air intake connector and a flue connector located on top of the water heater until they stop. Tighten 2 locking bands to secure 2" PVC pipes.

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

Support vertical and horizontal runs as described on page 22. Vertical supports are required every 4 ft. (1.2 m) along a vertical pipe route, after every transition to horizontal, and after every offset elbow.

Page 33

Vertical Vent Terminal Location

Optional

INSTALLATION INSTRUCTIONS

12" Min.

(300 mm)

A, B

Air Intake

Vent Pipe

Through Roof

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:

Location U.S. Installation Requirements

A = Minimum clearance above the roof

level.

B = Maximum clearance above roof

level (without additional support for vent pipe).

C = Required vent clearance from any

gable, dormer, or other roof structure with building interior access (i.e., vent, window).

D = Required vent clearance from any

forced air inlet, including dryer and furnace air inlets.

E = Minimum/maximum horizontal dis-

tance between vent terminals

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.

12 in. (30 cm) above roof level.

24 in. (61 cm) above roof level.

4 ft. (1.2 m)

10 ft. (3 m)

6-11/16 in. (17 cm) / 24 in. (61 cm)

Canadian Installation Requirements

18 in. (45.7 cm) above roof level.

24 in. (61 cm) above roof level.

4 ft. (1.2 m)

6 ft. (1.8 m)

6-11/16 in. (17 cm) / 24 in. (61 cm)

Venting

The vertical intake air termination requires a return bend or two short or long sweep radius 90° elbows to keep the inlet downward and prevent entry of rain. Refer to figure above for the proper location of the air intake with respect to the exhaust outlet termination.

The vertical exhaust outlet termination is a 2-inch or 3-inch pipe which terminates at least 12 inches (30 cm) above the air intake termination. The exhaust outlet terminations must be at least 12 inches (30 cm) in US [at least 18 inches (46 cm) in Canada] above the roof line or anticipated snow levels.

Page 34

Adjustable Roof Flashing

Support Clamp

Upward Slope

Support Hanger

Air Intake

Pipe

Exhaust Vent

Pipe

Optional

INSTALLATION INSTRUCTIONS

Venting for Direct-Vent Water Heater (cont.)

Standard Vertical Vent Termination

Venting

Page 35

Support Hanger

Adjustable Roof Flashing

Support Clamp

Air Intake

Pipe

Exhaust Vent

Pipe

Minimum Clearance 18 inches above roof

Concentric Vent Termination

Optional

Upward Slope

INSTALLATION INSTRUCTIONS

Alternative Vertical Vent Termination

Alternative vertical vent termination kits are commercially available. Please refer to the instruction sheet packaged with the kit for complete installation instructions.

WARNING:

Under no circumstances should the exhaust pipe and the air intake pipe be connected together.

Venting

NOTE:

Ensure proper condensate management in all vertical venting.

Page 36

INSTALLATION INSTRUCTIONS

Installation for Power Vent (Room Air) Application

spaces are connected by one or more openings in doors or floors having a total minimum free area of 2 square inches per 1000 Btu/hr (44 square cm per kW) of the aggregate input rating of all appliances.

Outdoor Combustion Air

Outdoor combustion air shall be provided through opening(s) to the outdoors in accordance with two permanent opening method or one permanent opening method. The minimum dimension of air openings shall not be less than 3" (8 cm).

Two Permanent Openings Method

Two permanent openings, one commencing within 12" (30 cm) of the top of the enclosure and one commencing within 12" (30 cm) of the bottom of the enclosure, shall be provided. The openings shall communicate directly, or by ducts, with the outdoors or spaces that freely communicate with the outdoors, as follows:

(1) Where directly communicating with the outdoors

or where communicating to the outdoors through vertical ducts, each opening shall have a minimum free area of 1 square inches per 4000 Btu/hr (5.5 square cm per kW) of aggregate input rating of all appliances in the enclosure.

(2) Where communicating with the outdoors through

horizontal ducts, each opening shall have a minimum free area of 1 square inches per 2000 Btu/hr (11 square cm per kW) of aggregate input rating of all appliances in the enclosure.

One Permanent Opening Method One permanent opening, commencing within 12" (30 cm) of the top of the enclosure, shall be provided. The water heaters shall have clearances of at least 1" (2.5 cm) from the sides and back and 6" (15 cm) from the front of the water heaters. The opening shall directly communicate with the outdoors or shall communicate through a vertical or horizontal duct to the outdoors or spaces that freely communicate with the outdoors and shall have a minimum free area of the following:

(1) 1 square inches per 3000 Btu/hr (7 square cm per

kW) of the aggregate input rating of all appliances located in the enclosure

(2) Not less than the sum of the areas of all vent

connectors in the space

Venting

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.

This water heater can use room air for combustion and ventilation as long as the installation complies with the National Fuel Gas Code, ANSI Z223.1/NFPA 54, and other applicable standards and local codes. Failure to comply with these standards and other instructions on the Tankless Water Heater Use and Care Manual may result in death or serious injury and/or damage to property.

Combustion Air Requirements

Proper operation of the water heater requires air for combustion and ventilation. Provisions for combustion and ventilation air must comply with referenced codes and standards.

Air for Combustion and Ventilation

Air for combustion, ventilation, and dilution of flue gases for water heater installed in buildings shall be obtained by indoor combustion air, outdoor combustion air, or combination indoor and outdoor.

Indoor Combustion Air

The minimum required volume shall be no less than 50 cubic feet per 1000 Btu/hr (4800 cubic cm per KW) of the aggregate input rating of all appliances within the space.

Openings used to connect indoor spaces shall be sized and located in accordance with the following:

(1) Combining spaces on the same story. Each

opening shall have a minimum free area of 1 square inch per 1000 Btu/hr (22 square cm per kW) of the aggregate input rating of all appliances in the space but not less than 100 square inches (600 square cm). One opening shall commence within 12" (30 cm) of the top of the enclosure and one opening shall commence within 12" (30 cm) of the bottom of the enclosure. The minimum dimension of air openings shall not be less than 3" (8 cm).

(2) Combining spaces in different stories. The

volumes of spaces in different stories shall be considered as communicating spaces where such

Page 37

Power Vent Installation

Adjustable Roof Flashing

Support Clamp

Support Hanger

Exhaust Vent

Pipe

Optional

INSTALLATION INSTRUCTIONS

Venting

Page 38

INSTALLATION INSTRUCTIONS

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.

Venting

Combination Indoor and Outdoor Combustion Air

The use of a combination of indoor and outdoor combustion air shall be in accordance with the following:

(1) Indoor openings. Where used, openings connecting

the interior spaces shall comply with "Indoor Combustion Air"

(2) Outdoor opening(s) location. Outdoor opening(s)

shall be located in accordance with "Outdoor Combustion Air"

(3) Outdoor opening(s) size. The outdoor opening(s)

size shall be calculated in accordance with the following: (a) The ratio of the interior spaces shall be the available volume of all communicating spaces divided by the required volume. (b) The outdoor size reduction factor shall be 1 minus the ratio of interior spaces. (c) The minimum size of outdoor opening(s) shall be the full size of outdoor opening(s) calculated in accordance with "Outdoor Combustion Air", multiplied by the reduction factor. The minimum dimension of air openings shall not be less than 3" (8 cm).

Refer to the latest edition of National Fuel Gas Code, ANSI Z223.1/NFPA 54 for additional information for the combustion air requirements.

Corrosive Atmosphere

The water heater should not be installed near an air supply containing halogenated hydrocarbons where contaminants can enter the combustion air supply.

The air supply containing halogenated hydrocarbons is 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.

Louvers, Grilles, and Screens

The required size of openings for combustion, ventilation, and dilution air shall be based on the net free area of each opening. Where the free area through a design of louver, grille, or screen is known, it shall be used in calculating the size opening required to provide the free area specified. Where the louver and grille design and free area are not known, it shall be assumed that wood louvers have 25 percent free area, and metal louvers and grilles have 75 percent free area. Nonmotorized louvers and grilles shall be fixed in the open position.

NOTICE:

Protective screening for combustion air inlet MUST NOT be smaller than 1/4”mesh to prevent clogging by lint or other debris.

Page 39

INSTALLATION INSTRUCTIONS

Installation for Common Vent

Only 2 identical models are allowed to have a common vent. If 3 or more units are installed, more than 2 common vent systems are required. All

notices described in “Venting” in this Use and Care manual are applicable for a common vent unless they are specifically mentioned in this section differently.

instructions, requirements, warnings, cautions and

Multiple Units Sizing

Number of 199,900

BTU/h water heaters

2 3 4 5 6 7 8 9

Total Input Rate (Btu/h)

399800 599700 799600

999500 1199400 1399300 1599200 1799100 1999000

Cold Water - Recommended

Manifold Header Size

(Inches)

1 1 1/4 1 1/2 1 1/2

Total input rate will drop naturally as longer vent length is added. Cold water, hot water and natural gas sizes are recommended size. The size requirements may change based on water pressure, gas pressure, pressure drop, and other factors at installation site. Adjust accordingly these sizes for each installation.

Hot Water - Recommended

Manifold Header Size

(Inches)

1 1 1/4 1 1/2 1 1/2

Natural Gas - Recommended

Manifold Header Size

(Inches)

1 1 1/4 1 1/4 1 1/4 1 1/2 1 1/2

Venting

Typical Inline Common Vent Installations

Direct Vent

Maximum vent length is

calculated using the longest

vent pipe distance, measured

from the farthest water heater

to the end of the termination

3" pipe only 3" pipe only

Non-Return Valve Non-Return Valve

To suitable

drain

3°

To suitable

drain

NOTE: Condensate

management

required for NRV.

12” min.

Wall

Page 40

INSTALLATION INSTRUCTIONS

Installation for Common Vent

Vent Materials

Venting

Use only 3 inch diameter schedule 40 PVC or CPVC. DO NOT use any flexible pipe.

Common venting system shall be in accordance with the National Fuel Gas Code, ANSI Z223.1/NFPA 54 and/or the CSA B149.1, Natural Gas and Propane installation Code (Current Editions), local codes, and the manufacturer’s instructions.

Recommended Vent Lengths

Before starting the vent installation, careful planning should be given to the routing and termination of the vent pipes. The length of the vent pipes (air intake and exhaust) should be kept to a minimum. Also, refer to this Use and Care manual for vent terminal placement. Refer to the maximum and minimum vent length charts for the pipe sizes that can be used and the total equivalent length of pipe that can be used. DO NOT exceed equivalent length of pipe in maximum vent length chart. Maximum vent length is calculated using the longest vent pipe distance, measured from the farthest water heater to the end of the termination (see diagram on previous page).

Vent Length (air intake and exhaust) each:

Vent System

Diameter

(Inches)

MINIMUM 3 1 0�3 90° Elbow

Feet Meters

Vent System

Termination

All intake and exhaust common venting components must have the same diameter size. DO NOT use a different size on the intake and exhaust common venting.

Non-Return Valve

WARNING:

Improper installation of a non-return valve and/or condensation trap can cause carbon monoxide dangers, and other potential hazardous conditions resulting in death, personal injury, and/or product damage.

After the water heaters are mounted on a wall securely, start assembling the common vent system.

A Rheem approved non-return valve is required at the exhaust connection of each heater that is common vented.

Approved Non-Return Valve Part no. SP21088.

Exhaust

Non-return

Valve

Hose Clamp

MAXIMUM 3 60 18�28 90° Elbow

3 inch 90 degree elbow and 45 degree elbow are equivalent to 5 ft (1.5 m), and 2.5 ft (0.8 m).

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.

Install a non-return valve at an exhaust connection of one of the tankless water heaters. To purchase the non-return valve, contact a store where the tankless water heaters were purchased. Tighten a hose clamp to secure the non-return valve.

Elbow Examples

Short Bend 90° Elbow

OK to Use

Standard Bend 90° Elbow

OK to Use

Long Bend 90° Elbow

OK to Use

Page 41

INSTALLATION INSTRUCTIONS

Installation for Common Vent (cont.)

2" PVC pipe

Hose Clamp

Install 2” PVC (or CPVC) schedule 40 pipe into the non-return valve, and tighten a hose clamp to secure the non-return valve. Install and connect a non-return valve and 3” PVC (or CPVC) pipe into the other water heater.

Y Section

Air Intake

2" PVC pipe stub

Hose Clamp

Install a short length of 2” PVC (or CPVC) schedule 40 pipe into an air intake connection of one of the tankless water heaters. Tighten a hose clamp to secure this pipe.

3" PVC pipe

2" to 3" PVC

2" PVC pipe stub

increaser

Venting

Connect 3” PVC pipes by T connection or Y connection, add vent pipes, and terminate on an outside wall as other section in this Use and Care manual instructed.

Min. 4" (102 mm)

Min. 3" (80 mm)

Attach silicone flexible tube or other flexible tube into a drain connection of the non-return valve. Create at least 4” (102 mm) diameter trap, pour water so that at least 3” (80 mm) water in the trap, and connect with a proper drain. All condensation must be drained and disposed of per local codes and requirements.

Connect 2” to 3” PVC increaser, and connect 3” PVC pipe. Install and connect 2” PVC pipe, 2” to 3” PVC increaser, and 3” PVC pipe into the other water heater.

Y Section

Connect 3” PVC pipes by T connection or Y connection, add vent pipes, and terminate on an outside wall as other section in this Use and Care manual instructed.

Page 42

INSTALLATION INSTRUCTIONS

SETTINGS

BACK ENTER

STATUS SERVICE MODE

SET POINT

SETTINGS

BACK ENTER

STATUS SERVICE MODE

NETWORK INSTANCE

SETTINGS

BACK ENTER

STATUS SERVICE MODE

NETWORK INSTANCE

SETTINGS

BACK ENTER

STATUS SERVICE MODE

NETWORK INSTANCE

Multiple Unit Controls

For installation of multiple water heaters, ensure proper manifolding of the controls and common venting as outlined in the section below. Note that up to 20 water heaters can have maniolded gas lines, water lines, and controls, however, vent pipes can only be common vented for a maximum of 2 water heaters. For more than 2 water heater installations, multiple vent runs will be required. For manifold systems with built-in recirculation pump, the first water heater in the series must contain the built-in recirculation pump to ensure proper operation. Additional water heaters in the series can be recirculation or nonrecirculation based on application requirements.

This water heater includes multiple unit controls to manifold up to 20 water heaters together. To accomplish multiple unit controls, a RJ25 communication cable(s) is required. Contact a store where tankless water heaters were purchased to purchase the RJ25 communication cable(s).

Suggested RJ25 Communication Cables

Part Number Length

RCPN-AMP03-0013111101-003 48"

RCPN-AMP03-0013111101-002 72"

RCPN-AMP03-0013111101-004 240"

Go to a display on one of the units, and press “SETTINGS”.

Turn off water and gas.

Remove screw covers, 4 screws, and a front cover for all water heaters.

Rubber Grommet

Connect all water heaters by the RJ25 Communication Cable(s). The RJ25 Communication Cable(s) should go through a rubber grommet on the bottom of the water heater, and be attached to one of the connectors on the right side of the display. The other end should be attached to another water heater.

RJ25 Communication Cable

Press the “▼” or “▲” button until “NETWORK INSTANCE” is displayed, and press “ENTER” to confirm.

Press the “▼” or “▲” button for several times to assign a unique and sequential instance number to the unit, and press “ENTER” to confirm. Repeat steps 4 through 6 until all manifolded units are assigned to a unique instance number.

Page 43

SETTINGS

BACK ENTER

STATUS SERVICE MODE

SET POINT

INSTALLATION INSTRUCTIONS

BACK ENTER

STATUS SERVICE MODE

Tankless ConfigSET POINT

SETTINGS

BACK ENTER

STATUS SERVICE MODE

Recirc.Pump Modes

SETTINGS

BACK ENTER

STATUS SERVICE MODE

Manifolded Heaters

SETTINGS

BACK ENTER

STATUS SERVICE MODE

Manifolded Heaters

SETTINGS

BACK ENTER

STATUS SERVICE MODE

Manifolded Heaters

Multiple Unit Controls (cont.)

7 11

MASTER

BACK ENTER

SETTINGS

STATUS SERVICE MODE

Go to a display on a unit with “INSTANCE” = 1, and press “SETTINGS”.

Press the “▼” or “▲” button until “Tankless Config” is displayed, and press “ENTER” to confirm.

Confirm the label “MASTER” is visible on the display of unit instance 2, and “MANIFOLD #*” is visible on display of instance * unit where * is the unit’s instance number. If set up is not completed properly and you don’t see the text, repeat steps 3 through 10.

SET POINT

BACK ENTER

SETTINGS

STATUS SERVICE MODE

Instance 1 will remain with the text “SET POINT” displayed on the main screen. Only Instance 1 is used to control the set point of all the manifolded units.

Press the “▼” or “▲” button until “Manifold Heaters” is displayed, and press “ENTER” to confirm.

Press the “▼” or “▲” button to set a number of manifolded water heaters, and click “ENTER” to confirm.

Install the front cover, 4 screws and the screw covers for all water heaters.

Turn on water and gas.

Page 44

INSTALLATION INSTRUCTIONS

Manifolded Water Heaters with Zoned Recirculation Setup

Hot Water Fixtures

Expansion

Tank

Hot Water Fixtures

Gas

Hot Water

Cold Water

Check Valve (Recommended)

Gate/Ball Valve

Page 45

Water Quality

INSTALLATION INSTRUCTIONS

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

RTG20124 RTG20220AB

Up to

Plumbing

Up to

5 mg/L

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, and 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 water 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).

Page 46

INSTALLATION INSTRUCTIONS

Thermal Expansion [Heating or recirculation application]

Determine if a check valve exists in the inlet water line. Check with your local water utility company. It may have been installed in the cold water line as a separate back flow preventer, or it may be part of a pressure reducing valve, water meter or water softener. A check valve located in the cold water inlet line can cause what is referred to as a “closed” water system. A cold water inlet line with no check valve or back flow prevention device is referred to as an “open” water system. As water is heated, it expands in volume and creates an increase in the pressure within the water system. This action is referred to as “thermal expansion”. In an “open” water system, expanding water and the resulting pressure increase which exceeds the capacity of the water heater, flows back into the city main where the pressure is easily dissipated.

A “closed” water system, however, prevents the expanding water from flowing back into the main

Plumbing

supply line, and the result of “thermal expansion” can create a rapid and dangerous pressure increase in the water heater and system piping. This rapid pressure increase can quickly reach the safety setting of the relief valve, causing it to operate during each heating

cycle. Thermal expansion, and the resulting rapid and repeated expansion and contraction of components in the water heater and piping system can cause premature failure of the relief valve, and possibility the heater itself.

NOTE:

All recirculation loops are "closed" water systems and require thermal expansion tank.

NOTICE:

Replacing the relief valve will not correct the problem!

The suggested method of controlling thermal expansion is to install an expansion tank in the cold water line between the water heater and the check valve.

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.

Water Supply Connections

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 power cord for approximately 10 minutes before 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" (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 drain line or pressure-relief valve.

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.

For recirculation without a dedicated return line, a thermal bypass (crossover) valve may be used at the

farthest faucet. The only approved valve for this type of installation is the Grundfoss Comfort Valve (Part no. RTG20285). See thermal bypass (crossover) valve instructions for installation details.

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 water flow rate of 0.4 gpm (1.5 lpm).

Water pressure of 65 psi (448 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 65 psi (448 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.

Page 47

INSTALLATION INSTRUCTIONS

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 65 psi (448 kPa).

Install a COLD water shut-off service valve on the inlet line of 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.

Open the shut-off valve in the COLD water Inlet line to check the water flow through the water heater.

Plumbing

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

NOTICES:

• 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 (e.g. appliances, fixtures, etc.) are 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.

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, etc.) from piping and fittings.

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

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.

Page 48

INSTALLATION INSTRUCTIONS

Water Piping Arrangement With Service 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.

Hot Water Service Valve

Cold Water Service Valve

Pressure Relif Valve

Water Inlet

Plumbing

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 valve.

NOTICE:

• The following drawing illustrates a pressure-only relief

•

• Manual operation of relief valves should be performed at

• If a relief valve discharges periodically, this may be due

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

A pressure relief valve must be installed as shown below.

least once a year.

to thermal expansion in a closed water supply system. Contact the water supplier or local plumbing inspector on how to correct this situation. Do not plug the relief valve. Turn off the water heater, unplug the unit, and call for service.

Cold Water

Service Hot Water Service Valve

Valve

Pressure Relif Valve

Water Inlet

Water Outlet

Drain

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.

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 "Water Supply Installation".

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.

Water Outlet

Drain

Page 49

INSTALLATION INSTRUCTIONS

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.

NOTICE:

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

Condensate

Condensate Drainage

It is recommended to install an external neutralizer. Contact a store where this water heater is purchased to purchase an external neutralizer.

WARNING:

The condensate coming from the water heater is known to be acidic. Without an external neutralizer, metals contacting the condensate can be corroded.

Be sure the condensate runs freely to a drain and does not blocked. In cold climates, precautions may need to be taken to ensure that the condensate drain does not freeze.

All condensation must be drained and disposed of per local codes and requirements.

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 pressurerelief valve(s).

Cold Water Service Valve

Pressure Relief Valve

Water Outlet

Drain

Use only PVC or CPVC pipe or flexible tube for the condensate drain line.

The drain pipe (along its entire length) must be at least the same diameter as the drain line.

The drain line should be as short as possible and have a downward slope toward the end.

The end of the drain pipe should be open to the atmosphere. The end should not be under water or other substances.

DO NOT connect the drain pipe directly to the drain sewer.

Hot Water Service Valve

Water Inlet

Plumbing

Recirculation return ﬁtting (Available only on certain models)

Condensate Drain

Page 50

INSTALLATION INSTRUCTIONS

Gas Supply

Gas Supply System

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 except the conversion following “Fuel Conversion Instructions” supplied with the water heater. 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.

• 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.

Gas Supply

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

• If flexible connectors are used, the minimum 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.

Manual Gas Supply Line Shut-Off Valve

WARNING:

Sediment Trap

Cap

Gas Piping

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/

Gas Input of

Cubic Feet Per Hour (CFH) =

regulator then the local gas company will need to be contacted in order to upgrade the meter/ regulator for the system.

Water Heater (BTU/HR)

Heating Value of Gas (BTU/FT3)

Page 51

Gas Supply

INSTALLATION INSTRUCTIONS

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.

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

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.

Rheem recommends connecting the water heater as the ﬁrst water heater downstream of the gas meter, to ensure a sufﬁcient gas supply

Gas meter's capacity > Total gas capacity of connected appliances

Gas Supply Line

The water heater is recommended to be the ﬁrst appliance to be connected to the gas supply line.

Gas Supply

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.

Page 52

INSTALLATION INSTRUCTIONS

Gas Supply

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 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. Speciﬁc Gravity : 0.60 (Capacity in cubic feet per hour)

Length Pipe Size (Inches)

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

Gas Supply

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)

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. Speciﬁc Gravity : 0.60 (Capacity in cubic feet per hour)

Length Pipe Size (Inches)

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)

½ ¾ 1 1¼ 1½

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. Speciﬁc 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 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. Speciﬁc 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)

Page 53

INSTALLATION INSTRUCTIONS

Gas Supply

Gas Supply Installation

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 valve.

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

Gas Supply

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

NOTICE:

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

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.

Page 54

INSTALLATION INSTRUCTIONS

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 leaktested 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.

• Contact a qualified service technician.

Gas Supply

Pressure Testing the Gas Supply System

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.

WARNING:

The water heater and its manual gas shut-off valve must be disconnected from the gas supply piping system during any pressure testing of the system at test pressures in excess of 1/2 psi (3.5 kPa).

The water heater must be isolated from the gas supply piping system by closing the manual gas shut-off valve during any pressure testing of the gas supply piping system at test pressures equal to or less than 1/2 psi (3.5 kPa).

Page 55

Gas Supply (cont.)

INSTALLATION INSTRUCTIONS

High-Altitude Installation

The water heater is certified for installations up to 10,200 ft. (3,110 m) above sea level. The input rating of this water heater is based on sea level operation. At higher elevations, the actual input rate may be lower than the value listed on the rating label due to the derating of Natural Gas and LP Gas.

Electrical Wiring

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, or in Canada, Canadian Electrical Code, CAN/CSA C22.1, Part 1.

NOTICE:

For installations above 2000 ft. (610 m) elevation, contact a qualified service technician to make the proper altitude adjustments. See “High Altitude Adjustments” for additional information.

WARNING:

DO NOT install this water heater at elevations above 2000 ft. (610 m) without the proper adjustments. Please contact your installer, local gas supplier, place of purchase, or the Rheem Customer Service phone number listed in the “Call for Assistance” section.

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

All water heaters come with a 3-prong power cord. Only use this power cord and a matching grounded electrical outlet.

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.

For outdoor installations, hard-wiring is required. See instructions in Outdoor Conversion kit for details

Hard-Wiring the Electrical

Gas Supply

Electrical

CAUTION:

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

is recommended

NOTICE:

• DO NOT connect power until venting installation is complete (see Venting Installation).

• 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.

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 dedicated 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.

Page 56

INSTALLATION INSTRUCTIONS

Wiring Diagram

MOTOR

MOTEUR

RED, ROUGE

WHITE, BLANC

BROWN, MARRON

COLOR CODE

CODE COULEUR

BLACK, NOIR

BK:

BR:

357

2 1

864

W BL

REMOTE RECIRC EXT1

CTRL RECIRC.1

BLUE, BLEU

GRAY, GRIS

GREEN, VERT

ORANGE, ORANGE

YELLOW, JAUNE

GREEN / YELLOW,

BL:

BK R Y W G

GY:

G/Y:

141210

DISPLAY

MOTOR

LIMITER

GAS CONTROL MOTOR

MOTEUR COMMANDE

DU GAZ

5 4 3 2 1

PLAQUE DE CIRCUIT

GAS TYPE CIRCUIT BOARD

VERT / JAUNE

PINK, ROSE P:

AFFICHAGE

MOTEUR

G R

LIMITEUR

BK BRBLW O Y

12345

TYPE GAZ

IMPRIM

HOT WATER OUTLET THERMISTOR

WATER LEVEL ELECTRODE

ÉLECTRODE DE NIVEAU D'EAU

THERMISTANCE SORTIE D'EAU CHAUDE

EXHAUST THERMISTOR

THERMISTANCE ÉVACUATION

WATER INLET THERMISTOR

THERMISTANCE ENTRÉE D'EAU FROIDE

HEAT EXCHANGER THERMISTOR

THERMISTANCE ÉCHANGEUR DE CHALEUR

WATER FLOW SENSOR

CAPTEUR DE DÉBIT D'EAU

16 15

10 9

11 12

BK or W

BK or WWW

LIMITER

LIMITEUR

WATER VOLUME

CONTROL MOTOR

MOTOR

MOTEUR

LIMITER

LIMITEUR

WATER BY-PASS

BK G W O YR BRBL BKG W O YR BR BL

357

CONTROL MOTOR

OVER HEAT LIMITER

41-23050 4

MOTEUR DÉBIT D'EAU

MOTEUR MÉLANGE D'EAU

LIMITEUR DE SURCHAUFFE

Electrical

FAN MOTOR

VENTILATEUR DU MOTEUR

WIRING DIAGRAM

SCHÉMA DE CÂBLAGE

BL R O Y

6 5 4 3 2 1

G.A.

R.V.

IGNITER

ALLUMEUR

GAS-AIR-RATIO VALVE

VANNE RATIO GAZ-AIR

RESISTOR

RÉSISTANCE

CIRCUIT BOARD

CARTE ÉLECTRONIQUE

BKBK

5 6

1234567

SV1

GND

G or

G/Y

SOLENOID VALVE 1

ÉLECTROVANNE 1

120V

YGR

RRR

123456789

233

456

BK BK

GND

G/Y

PUMP

FOR PUMP BUILT-IN MODEL

MODÈLE AVEC POMPE

BK W

101112

BK W

FLAMEROD

DÉTECTEUR DE

FLAMMES

G/Y

GND

WHEN YOU CHANGE PCB,

PLEASE REMOVE THESE SCREWS

Page 57

Insulation Blankets

INSTALLATION INSTRUCTIONS

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, vent exhaust, 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 "Venting" in this manual.

• Maintain proper clearances to combustibles

and noncombustibles as specified on the rating plate.

• Make sure the venting system complies with

local codes, National Fuel Gas Code (ANSI Z223.1/NFPA 54) or Natural Gas and Propane Installation Code (CAN/CSA B149.1), and the guidelines found on "Venting" 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 only Teflon tape on all male water line connections and fittings.

DO NOT block or restrict any outside 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.

DO NOT use Teflon tape on gas line connections and fittings in US.

Page 58

INSTALLATION INSTRUCTIONS

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 Installation

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 glycol and 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.

Air

Separator

Air Handler

(Pump included)

Gas

Supply

Line

Shut-Off

Valve

Tempering

Valve

Tempered

Water

Drain Valve

Cold Water Supply

Shut-Off Valve

Potable Water

Expansion Tank

(2 gallons)

Check

Valve

Cold Water

Supply

Page 59

Hot Water

to Fixtures

Hot Water

Loop

Dedicated

Return Line

Circulation

Pump with built

in check valve

Expansion

Tank

Wire to Connect

Pump to heater

(8 ft long)

Cold water

to Tankless

Cold Water

Supply

(Copper Pipe)

Check Valve

Shut off

Valve

(Copper Pipe)

Optional Shut

off valve

INSTALLATION INSTRUCTIONS

Recirculation Control (With External Pump)

This section “Recirculation Control (With External Pump)” is applicable for models without built-in pump.

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 plumbing system to provide hot water more quickly when a faucet is opened. Rheem offers a fully packages 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 93 of this use and care manual if you need more information.

Recirculating Pump

Page 60

Control

Board

PUMP

Add

4 Amp

Fuse

Blue

connector

Cut blue connector

and splice wires.

INSTALLATION INSTRUCTIONS

Recirculation Control (With External Pump)

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. Rheem recirculation pump kit includes a molex connector and a 4 amp fuse so splicing wires is not required.

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 "Typical

Recirculation Pump Installation".

NOTICE: Some pumps may have built in check valve

Recirculating Pump

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.

Control

Board

Ground

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.

Blue

connector

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

Page 61

Power receptacle should be close to

appliance

Tankless

water heater

power cord

Cold

To fixture

Hot

Service

valves

Fixtures

Hot Cold Hot Cold

Cold

water line

Expansion

tank

Install Thermal Bypass

(Crossover) Valve

at the farthest fixture

Cold water to tankless

water heater

Cold water

supply

(Copper pipe)

Check

valve

Shut-off

valve

Shut-off

valve

(Copper pipe)

INSTALLATION INSTRUCTIONS

Recirculation Control With Thermal Bypass (Crossover) Valve Kit

Thermal Bypass (Crossover) Valve Kit can be used for applications that DO NOT have a dedicated return line. Thermal Bypass (Crossover) Valve should be installed at the farthest fixture. Use Rheem approved Thermal Bypass (Crossover) valve kit only. Refer to Table on this page for maximum allowable equivalent pipe length.

The only approved thermal bypass (crossover) valve for this type of installation is the Grundfoss Comfort Valve Kit (Part no. RTG20285). See crossover valve instructions for installation details.

Typical Installation With Comfort Valve Kit

CAUTION:

Warm water may be present in cold water fixtures and cold water line during pump operation and a short period thereafter, when using cold water line as a return line.

Recirculation Control (Recommended size and length for recirc line)

To conserve energy and minimize heat loss, insulation of hot water lines is recommended.

Pipe Diameter (Copper pipe)

Maximum allowable equivalent pipe length

Maximum Alowable Equivalent Pipe Length*

*Equivalent pipe length includes hot water line, return lines and all fitting

3/4" 1/2"

400 ft. 100 ft.

Page 62

SETTINGS

BACK ENTER

STATUS SERVICE MODE

Service Alert

SETTINGS

BACK ENTER

STATUS SERVICE MODE SETTINGS

BACK ENTER

STATUS SERVICE MODE

MANIFOLD ROTATE?

SETTINGS

BACK ENTER

STATUS SERVICE MODE

Service Alert

SETTINGS

BACK ENTER

STATUS SERVICE MODE

500 HOURS

SETTINGS

BACK ENTER

STATUS SERVICE MODE

SETTINGS

BACK ENTER

STATUS SERVICE MODE

Recirc.Pump Modes

SET POINT

INSTALLATION INSTRUCTIONS

Service Alert

Service alert 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. In addition to those maintenance activities, conduct inspections, care cleaning and preventive maintenance activities refer to “Water Heater Inspections”, “Care and Cleaning” and “Preventive Maintenance” in this Use and Care Manual. Contact technical service department listed on page 93 of this use and care manual if you are not familiar with these maintenance activities.

The Factory setting is "OFF". Press the "▼" or "▲" button to choose between "500 Hours", "750 Hours" or "1000 Hours" of combustion time for the service alert and press "ENTER" button to confirm.

To exit this setting, press "Back" button until the initial screen is displayed.

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

Press the "SERVICE" button.

NOTICE:

It is recommended not to change default 500 hours unless it is absolutely necessary.

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

Press the "▼" or "▲" button until "Service Alert" is displayed, and press the "ENTER" button.

Start/Adjust

Page 63

SETTINGS

BACK ENTER

STATUS SERVICE MODE

Tankless Config

SETTINGS

BACK ENTER

STATUS SERVICE MODE

Tankless Config

SETTINGS

BACK ENTER

STATUS SERVICE MODE

ALTITUDE

SETTINGS

BACK ENTER

STATUS SERVICE MODE

Sea Level

SETTINGS

BACK ENTER

STATUS SERVICE MODE

Elevation

SETTINGS

BACK ENTER

STATUS SERVICE MODE

SET POINT

INSTALLATION INSTRUCTIONS

High-Altitude Adjustments

WARNING:

When the water heater is installed above 2000ft (610m), the setting on the LCD on the user interface need to be changed altitude. If these setting are not changed, the water heater may not function properly

Press the "SETTINGS" button.

Press the "▼" or "▲” button until “ Elevation ” is displayed, and press the “ ENTER “ button.

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

Press the "▼" or "▲" button until “ Tankless Config” is displayed, and press the “ ENTER “ button.

The Factory setting is "Sea Level".

Press the "▼" or "▲" button to choose “Low Altitude”, “Med. Altitude” or “High Altitude”, and press the "ENTER" button to confirm.

To exit this setting, press "Back" button until the initial screen is displayed.

SECTION HIGH-ALTITUDE

Sea Level 0 – 2,000 ft (0 m – 610 m)

Low Altitude 2,001 ft – 5,400 ft

(610 m – 1,650 m)

Med. Altitude 5401 ft – 7,900 ft

(1,650 m – 2,410 m)

High Altitude 7,901 ft – 10,200 ft

(2,410 m – 3,110 m)

Start/Adjust

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

Page 64

INSTALLATION INSTRUCTIONS

Installation Checklist

A. Water Heater Location

Indoor water heaters must be installed indoors. Outdoor water heaters must be installed outdoor.

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.

Water filter is clean and in place.

All piping has been assembled as described on "Water Supply".

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.

Gas line equipped with shut-off valve, union and sediment trap as described on "Gas Supply System."

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

B. Vent (Indoor Models)

Checklist

C. Water Supply/Relief Valve

Water heater is properly secured to the wall.

Vent pipe material is ULC S636 approved and manufacturer-approved.

Horizontal air intake pipe and exhaust pipe have a 1/4" per foot UPWARD slope toward the vent terminal.

Vertical venting is installed as described on "Vertical Vent Installation.

Connection(s) securely fastened together with cement and airtight.

All vent runs are properly installed.

Vent terminal is properly installed.

Maximum vent length is observed.

High altitude adjustment is properly made per elevation.

Water supply has sufficient pressure.

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

Water connections tight and free from leaks.

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

Gas company inspected installation (if required).

Main gas valve to the water heater is turned on

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

Condensate drain is properly installed.

G. Set Temperature

Water temperature is set to a safe temperature as described on "Setting the Water Temperature".

Page 65

USING YOUR WATER HEATER

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.

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.

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. .

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

Start/Adjust

Page 66

USING YOUR WATER HEATER

Activating the Water Heater

Operating Instructions

Read, understand, and follow the safety information listed on the operating label and in the “Important Safety Information” section in this manual.

Turn water heater off. Unplug the water heater from electrical outlet or disconnect the power supply at

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

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.

NOTICE:

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

Start/Adjust

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

Page 67

USING YOUR WATER HEATER

Activating the Water Heater

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

Turn water heater off. Unplug the water heater from electrical outlet or disconnect the power supply at the circuit breaker.

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

Page 68

USING YOUR WATER HEATER

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 heater control. Be sure to read and follow the warnings outlined on the pictured label.

The recommended setting for the water temperature is 120°F (49°C). The heater control has been preset and shipped at 120°F (49°C) 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.

Time/Temperature Relationship in Scalds

Water Temperature Time to Produce a Serious Burn

120°F (49°C) More than 5 minutes 125°F (52°C) 1 1/2 to 2 minutes

Use Instructions

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

D ANGER

HOT

BURN

Water temperature over 125°F (52°C) can cause severe burns instantly or death from scalds.

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

See instruction manual before setting temperature at water heater.

Feel water before bathing or showering.

Temperature limiting valves are available, see manual.

Safety Precautions

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, solvents, 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 gasburning 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.

• DO NOT turn on water heater if cold water supply shut-off valve is closed.

• 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.

Page 69

USING YOUR WATER HEATER

Setting the Water Temperature

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.

Cloud Connectivity

Wi Fi

Diagnostic

Set Point Temperature

Control Buttons

SETTINGS

Blower On

Warning

SET POINT

BACK ENTER

STATUS SERVICE MODE

UNLOCK / LOCK (HOLD 3 SEC)

Recirculation On

Screen Lock

Burner On

Status Icons

Control Button Indicator Icons

NOTICE:

Cannot change the temperature set point on the user interface when a hot water faucet is in the open position. Close a hot water faucet when the temperature set point is changed.

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 User Interface.

Default temperature shown in Fahrenheit.

See "Setting the Water Temperature" in this U&C manual.

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.

Use Instructions

The heater control temperature range is between 85°F (29°C) and 140°F (60°C). See "Setting The Water Temperature" in this Use and Care Manual to adjust the temperature to the desired setting. The new temperature set point will show on the LCD (Liquid Crystal Display).

Page 70

SETTINGS

BACK ENTER

STATUS SERVICE MODE

SET POINT

SETTINGS

BACK ENTER

STATUS SERVICE MODE

SET POINT

SETTINGS

BACK ENTER

STATUS SERVICE MODE

SET POINT

SETTINGS

BACK ENTER

STATUS SERVICE MODE

SET POINT

SETTINGS

BACK ENTER

STATUS SERVICE MODE

SET POINT

SETTINGS

BACK ENTER

STATUS SERVICE MODE

SET POINT

USING YOUR WATER HEATER

Setting the Water Temperature

WARNING:

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

Setting delivered water temperature

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

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

Use Instructions

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

Lock icon

Center buttons

Press and hold both buttons

Display needs to be unlocked before the settings can be changed. Push and hold two buttons in center until beeping sound is heard. Once unlocked the “SETTINGS”, “STATUS” or “SERVICE” menus can be accessed.

Lock icon is dimmed,

when display is unlocked

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.

Temperature Conversion Chart °F/°C (Reference only)

85 100 102 104 106 108 110 112 114 116 118 120 125 130 140 °F 29 38 39 40 41 42 43 44 46 47 48 49 52 54 60 °C

Hotter water increases the potential for Hot Water SCALDS.

DANGER:

Unlocked display shown above

Press button

to access

“SETTINGS”

Menus

Temperature “SET POINT” can be changed by accessing the “SETTINGS” menu.

Page 71

SETTINGS

BACK ENTER

STATUS SERVICE MODE

SET POINT

SETTINGS

BACK ENTER

STATUS SERVICE MODE

SET POINT

SETTINGS

BACK ENTER

STATUS SERVICE MODE

SET POINT

SETTINGS

BACK ENTER

STATUS SERVICE MODE

120

°F

SETTINGS

BACK ENTER

STATUS SERVICE MODE

120

°F

SETTINGS

BACK ENTER

STATUS SERVICE MODE

115

°F

SETTINGS

BACK ENTER

STATUS SERVICE MODE

SET POINT

SETTINGS

BACK ENTER

STATUS SERVICE MODE

Temp Display

SETTINGS

BACK ENTER

STATUS SERVICE MODE

SET POINT

BACK ENTER

STATUS SERVICE MODE

Temp Display

SETTINGS

BACK ENTER

STATUS SERVICE MODE

SETTINGS

BACK ENTER

STATUS SERVICE MODE

Fahrenheit

SET POINT

SETTINGS

BACK ENTER

STATUS SERVICE MODE

SET POINT

SETTINGS

BACK ENTER

STATUS SERVICE MODE

115

°F

SETTINGS

BACK ENTER

STATUS SERVICE MODE

SET POINT

SETTINGS

BACK ENTER

STATUS SERVICE MODE

SET POINT

SETTINGS

BACK ENTER

STATUS SERVICE MODE

120

°F

SETTINGS

BACK ENTER

STATUS SERVICE MODE

115

°F

USING YOUR WATER HEATER

Setting the Water Temperature

How To Change The Temperature

Display

After you select “SETTINGS” scroll through the menu to select “SET POINT”, to enter the set point mode press “ENTER” button, which is the right most button.

Press the "SETTINGS" button.

Center buttons

Now press the “▼” or “▲” button in the center of the display to increase or decrease the temperature. Temperature can be changed in increments of 1°F.

Once temperature is set to the desired value, press “ENTER” button, right most button to store value.

To exit this setting, press "Back" button until the initial screen is displayed.

Press the “▼” or “▲” button until "Temp Display is displayed, and press "ENTER" button.

The Factory setting is "Fahrenheit". Press the “▼” or “▲” button to select "Fahrenheit" and "Celsius", and press the "ENTER" to confirm.

To exit this setting, press "Back" button until the initial screen is displayed.

Use Instructions

Page 72

SETTINGS

BACK ENTER

STATUS SERVICE MODE SETTINGS

BACK ENTER

STATUS SERVICE MODE

Tankless ConfigSET POINT

SETTINGS

BACK ENTER

STATUS SERVICE MODE

Recirc.Pump Modes

BACK ENTER

STATUS SERVICE MODE

Tankless ConfigSET POINT

SETTINGS

BACK ENTER

STATUS SERVICE MODE

Recirc.Pump Modes

SETTINGS

BACK ENTER

STATUS SERVICE MODE

Recirc.Pump Modes

SETTINGS

BACK ENTER

STATUS SERVICE MODE SETTINGS

BACK ENTER

STATUS SERVICE MODE

Tankless ConfigSET POINT

SETTINGS

BACK ENTER

STATUS SERVICE MODE

SETTINGS

BACK ENTER

STATUS SERVICE MODE

None

SETTINGS

BACK ENTER

STATUS SERVICE MODE

OFF

SETTINGS

BACK ENTER

STATUS SERVICE MODE

Recirc.Pump Modes

SET POINT

USING YOUR WATER HEATER

Recirculation Setting

This section is applicable for pump built-in models, and standard models with an external pump following the pump installation described in this Use and Care manual. If the external pump is installed independently from the water heater, this section is not applicable.

For recirculation setting, timer mode, schedule mode, and on demand mode are available. Timer mode also has Performance mode and Energy Saver mode. Read next several pages to set most suitable mode. Contact service department listed on page 93 of this use and care manual if additional help is needed.

The Factory setting is “None”.

Mode Setting - Timer mode-

Press the “ SETTINGS” button.

Press the “▼” or “▲” button until “Tankless Config” is displayed, and press the “ENTER” button.

Press the “▼” or “▲” button to select “Timer- Perf” or “Timer-E-Saver” and press the “ENTER” to confirm.

Recirculation Operation

-Timer mode -

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 based on the temperature thermistor readings.

Performance mode (Timer-Perf)

The performance mode operates as below;

• Higher energy consumption due to more pump

cycles

• Pump cycles ON Every 15 to 30 minutes

Energy Saver mode (Timer E-Saver)

The Energy Saver mode operates as below;

• Less Energy consumption due to fewer pump

cycles

Recirculating Pump

Press the “▼” or “▲” button until “Recirc. Pump Modes” is displayed, and press the “ENTER“ button.

• Pump cycles ON Every 30 to 60 minutes

Page 73

SETTINGS

BACK ENTER

STATUS SERVICE MODE

SETTINGS

BACK ENTER

STATUS SERVICE MODE

Recirc.Pump Modes

SET POINT

BACK ENTER

STATUS SERVICE MODE

Tankless ConfigSET POINT

SETTINGS

BACK ENTER

STATUS SERVICE MODE

Recirc.Pump Modes

SETTINGS

BACK ENTER

STATUS SERVICE MODE

Recirc.Pump Modes

SETTINGS

BACK ENTER

STATUS SERVICE MODE SETTINGS

BACK ENTER

STATUS SERVICE MODE

Tankless ConfigSET POINT

SETTINGS

BACK ENTER

STATUS SERVICE MODE

SETTINGS

BACK ENTER

STATUS SERVICE MODE

None

SETTINGS

BACK ENTER

STATUS SERVICE MODE

OFF

SETTINGS

BACK ENTER

STATUS SERVICE MODE

Recirc.Pump Modes

SET POINT

USING YOUR WATER HEATER

Recirculation Setting (Cont.)

Mode Setting - On Demand-

Press the “ SETTINGS ” button.

Press the “▼” or “▲” button until “Tankless Config” is displayed, and press the “ ENTER“ button.

If incorrect setting is entered at any steps, press the "Back" button until the initial screen.

Redo from step 1.

The Factory setting is “None”.

Press the “▼” or “▲” button until “On-Demand” is displayed, and press the "ENTER" button.

To exit this setting, press "Back" button until the initial screen is displayed.

Recirculation Operation-On Demand -

The following accessories are needed to use the On-Demand recirculation activation.

Rheem Part Number Description

SP20862 Motion Sensor Kit

SP20863 Wired Push Button

When set to " On-Demand" mode, the recirculation pump is ON for 5 minutes when the signal from the Motion Sensor or Wired Push Button is received, or until the return water temperature reaches approximately 15°F below the setting temperature.

For information about On-Demand accessories, refer to "If You Need Service" on page 93, "Call For Assistance" for the telephone number to speak to a Customer Service Representative.

Recirculating Pump

Press the “▼” or “▲” button until “Recirc. Pump Modes” is displayed, and press the "ENTER" button.

Page 74

SETTINGS

BACK ENTER

STATUS SERVICE MODE

SETTINGS

BACK ENTER

STATUS SERVICE MODE

Recirc.Pump Modes

SET POINT

BACK ENTER

STATUS SERVICE MODE

Tankless ConfigSET POINT

SETTINGS

BACK ENTER

STATUS SERVICE MODE

Recirc.Pump Modes

USING YOUR WATER HEATER

Recirculation Setting

Mode Setting

-Manually operate pump-

On-Demand mode allows to turn ON the recirculation pump manually.

(Disabled in Timer mode)

Recirc.Pump

BACK ENTER

SETTINGS

STATUS SERVICE MODE

Press the “▼” or “▲” button until “Recirc. Pump” is displayed, and, press the “ENTER” button.

Press the “ SETTINGS ” button.

Press the “▼” or “▲” button until “Tankless Config” is displayed, and press the "ENTER" button.

If incorrect setting is entered at any steps, press the "Back" button until the initial screen.

Redo from step 1.

Recirculating Pump

Disable

BACK ENTER

SETTINGS

STATUS SERVICE MODE

The Factory setting is “Disabled”.

Press the “▼” or “▲” button until "Enable" is displayed and press the "Enter" button.

To exit the setting, press "Back" button until the initial screen is displayed.

Recirculation Operation

-Manually operate pump-

When set the “Recirc. Pump” ON, the recirculation pump is ON for 5 minutes or until the return water temperature reaches approximately 15°F below the setting temperature.

Page 75

SETTINGS

BACK ENTER

STATUS SERVICE MODE

SETTINGS

BACK ENTER

STATUS SERVICE MODE

Recirc.Pump Modes

SET POINT

BACK ENTER

STATUS SERVICE MODE

Tankless ConfigSET POINT

SETTINGS

BACK ENTER

STATUS SERVICE MODE

Recirc.Pump Modes

SETTINGS

BACK ENTER

STATUS SERVICE MODE

Recirc.Pump Modes

SETTINGS

BACK ENTER

STATUS SERVICE MODE SETTINGS

BACK ENTER

STATUS SERVICE MODE

Tankless ConfigSET POINT

SETTINGS

BACK ENTER

STATUS SERVICE MODE

SETTINGS

BACK ENTER

STATUS SERVICE MODE

None

SETTINGS

BACK ENTER

STATUS SERVICE MODE

OFF

SETTINGS

BACK ENTER

STATUS SERVICE MODE

Recirc.Pump Modes

SET POINT

USING YOUR WATER HEATER

Recirculation Setting (Cont.)

Mode Setting -Schedule-

Press the “ SETTINGS ” button.

Press the “▼” or “▲” button until “Tankless Config” is displayed, and press the "ENTER" button.

The Factory setting is "None" Press the “▼” or “▲” button until “Schedule” is

displayed, and press the "ENTER" button. To exit this setting, press "Back" button until the

initial screen is displayed.

NOTICE:

To use this schedule mode, it is required to set Wi-Fi on this user interface and to download the specific application on your smart phone. Please see "Wi-Fi Setting" in this U&C manual to set Wi-Fi on this user interface and to download the application.

Recirculating Pump

Press the “▼” or “▲” button until “Recirc. Pump Modes” is displayed, and press the "ENTER" button.

Page 76

SETTINGS

BACK ENTER

STATUS SERVICE MODE SETTINGS

BACK ENTER

STATUS SERVICE MODE

SET POINTWiFi Setup?

SETTINGS

BACK ENTER

STATUS SERVICE MODE

WiFi Status

BACK ENTER

STATUS SERVICE MODE

SET POINTWiFi Setup?

SETTINGS

BACK ENTER

STATUS SERVICE MODE

WiFi Status

SETTINGS

BACK ENTER

STATUS SERVICE MODE

WiFi Status

SETTINGS

BACK ENTER

STATUS SERVICE MODE SETTINGS

BACK ENTER

STATUS SERVICE MODE

SET POINTWiFi Setup?

SETTINGS

BACK ENTER

STATUS SERVICE MODE

WiFi Setup?

SETTINGS

BACK ENTER

STATUS SERVICE MODE

Yes

SETTINGS

BACK ENTER

STATUS SERVICE MODE

SETTINGS

BACK ENTER

STATUS SERVICE MODE

WiFi Status

SET POINT

BACK ENTER

STATUS SERVICE MODE

SET POINTWiFi Setup?

SETTINGS

BACK ENTER

STATUS SERVICE MODE

Yes

SETTINGS

BACK ENTER

STATUS SERVICE MODE

SETTINGS

BACK ENTER

STATUS SERVICE MODE

WiFi Status

SET POINT

SETTINGS

BACK ENTER

STATUS SERVICE MODE

SETTINGS

BACK ENTER

STATUS SERVICE MODE

WiFi Status

SET POINT

USING YOUR WATER HEATER

WiFi Setting (Select models only)

WiFi Setup (At initial power up)

Display will ask at initial power up if the user wants to Setup WiFi. The user can press ENTER to continue Wi-Fi setup or BACK to exit setup and turn OFF WiFi signal broadcast.

If need WiFi setup, press “ENTER” button.

Press the “▼” or “▲” button until “WiFi Setup?” is

displayed, and press “ENTER” button.

WiFi signal is broadcasted for 30 minutes and the user will use the EcoNET Application to continue the setup process. The steps are in the application.

If user chooses to set up WiFi later, press “BACK” button. WiFi signal will not be broadcasted until user goes to additional steps.

WiFi Setup (After initial power up)

Press the “STATUS” button.

Recirculating Pump

Press the “▼” or “▲” button until “Yes” is displayed,

and press “ENTER” button.

WiFi signal will start to broadcast (WiFi icon will start

to blink) for 30 minutes and user can use the EcoNet

Application to setup WiFi.

If setup is not completed in the next 30 minutes, WiFi

will stop broadcasting. User should go to these steps

again to re-start WiFi setup.

Once WiFi is setup correctly, WiFi icon will become

solid.

WiFi

Press the “▼” or “▲” button until “WiFi status” is displayed, and press “ENTER” button.

In the event that WiFi credentials are changed,

please follow WiFi setup steps again.

Page 77

WiFi Setting (cont.)

BACK ENTER

STATUS SERVICE MODE

SET POINTWiFi Setup?

SETTINGS

BACK ENTER

STATUS SERVICE MODE

WiFi Status

BACK ENTER

STATUS SERVICE MODE

SET POINTWiFi Setup?

SETTINGS

BACK ENTER

STATUS SERVICE MODE

Yes

SETTINGS

BACK ENTER

STATUS SERVICE MODE

SETTINGS

BACK ENTER

STATUS SERVICE MODE

WiFi Status

SET POINT

SETTINGS

BACK ENTER

STATUS SERVICE MODE

WiFi Reset

BACK ENTER

STATUS SERVICE MODE

SET POINTWiFi Setup?

SETTINGS

BACK ENTER

STATUS SERVICE MODE

Yes

SETTINGS

BACK ENTER

STATUS SERVICE MODE

SETTINGS

BACK ENTER

STATUS SERVICE MODE

WiFi Status

SET POINT

SETTINGS

BACK ENTER

STATUS SERVICE MODE

SETTINGS

BACK ENTER

STATUS SERVICE MODE

WiFi Status

SET POINT

USING YOUR WATER HEATER

Steps to reset WiFi

These steps are to reset the WiFi chip, in the event that WiFi stops working and WiFi credentials are NOT changed.

To reset WiFi and make it try to connect to the network again,

Press the “Service” button.

WiFi signal will reset and WiFi icon all start blinking again.

WiFi will try to reconnect to the stored WiFi network using the same credentials.

Once WiFi is connected again correctly, WiFi icon will become solid.

Models with WiFi can be monitored and controlled from the EcoNet mobile app. Scan the QR code for download.

WiFi

Press the “▼” or “▲” button until “WiFi Reset” is displayed, and press “ENTER” button.

Press the “▼” or “▲” button until “Yes” is displayed, and press “ENTER” button.

Follow in-app instructions for setup

Start/Adjust

Page 78

SETTINGS

BACK ENTER

STATUS SERVICE MODE

SETTINGS

BACK ENTER

STATUS SERVICE MODE

Recirc.Pump Modes

SET POINT

BACK ENTER

STATUS SERVICE MODE

Tankless ConfigSET POINT

SETTINGS

BACK ENTER

STATUS SERVICE MODE

Recirc.Pump Modes

SETTINGS

BACK ENTER

STATUS SERVICE MODE

Water Saver Mode

SETTINGS

BACK ENTER

STATUS SERVICE MODE SETTINGS

BACK ENTER

STATUS SERVICE MODE

TANKLESS CONFIG

SETTINGS

BACK ENTER

STATUS SERVICE MODE

SETTINGS

BACK ENTER

STATUS SERVICE MODE

Off

SETTINGS

BACK ENTER

STATUS SERVICE MODE

Water Saver Mode

USING YOUR WATER HEATER

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 outlet hot water reaches set temperature. 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:

Press the "▼" or "▲" button until "Water Saver

Mode" is displayed, and press the "ENTER" button.

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

Press the "SETTINGS" button.

The Factory setting is "Off".

Press the "▼" or "▲" button to select "On" and

press the "ENTER" button to confirm.

To exit this setting, press "Back" button until the

initial screen is displayed.

Turn on the gas and water to the water heater by

opening the shut off valves.

Press the "▼" or "▲" button until "Tankless Config" is displayed, and press the "ENTER" button.

Start/Adjust

Page 79

BACK ENTER

STATUS SERVICE MODE

Tankless ConfigSET POINT

SETTINGS

BACK ENTER

STATUS SERVICE MODE

Recirc.Pump Modes

SETTINGS

BACK ENTER

STATUS SERVICE MODE

Water Saver Mode

BACK ENTER

STATUS SERVICE MODE

TANKLESS CONFIG

SETTINGS

BACK ENTER

STATUS SERVICE MODE

Off

SETTINGS

BACK ENTER

STATUS SERVICE MODE

Water Saver Mode

SETTINGS

BACK ENTER

STATUS SERVICE MODE

SETTINGS

BACK ENTER

STATUS SERVICE MODE

Recirc.Pump Modes

SET POINT

USING YOUR WATER HEATER

Water Saving Control (cont.)

Follow the steps below to turn Off the water saver model:

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

Press the "▼" or "▲" button until "Water Saver

Mode" is displayed, and press the "ENTER" button.

Press the "SETTINGS" button.

Press the "▼" or "▲" button until "Tankless Config" is displayed, and press the "ENTER" button.

Press the "▼" or "▲" button to select "Off" and

press the "ENTER" button to confirm.

To exit this setting, press "Back" button until the

initial screen is displayed.

Turn on the gas and water to the water heater by

opening the shut off valves.

Start/Adjust

Page 80

CARING FOR YOUR WATER HEATER

Water Heater Inspections

Venting System

The venting system should be inspected annually to ensure all of the vent sections are secure and airtight. Qualified service personnel are familiar with vent system inspections and may be contacted for advice.

In applicable climates, periodically inspect the vent and air-inlet terminals to ensure they are not blocked by snow.

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.

Check the air intake and vent exhaust for blockage

and/or debris.

Air Intake

Vent Exhaust

Condensate Collector

CAUTIONS:

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

• DO NOT operate without the condensate collector

drain connected and routed to a proper drain that can handle corrosive condensate. This could cause the system to malfunction or fail. An external condensate neutralizer needs to be installed to local codes.

(Only on recirculation models)

Condensate Drain

Water Filters

DANGER:

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

Care Instructions

Condensate Drain

On a regular basis, inspect the condensate drain line to ensure the condensate is draining properly.

WARNING:

The condensate coming from the water heater is known to be acidic. Without an external neutralizer or a proper amount of medium in the neutralizer, metals contacting the condensate can be corroded. Periodically check the medium of the external neutralizer visually to ensure that it is not depleted if the external neutralizer is installed.

Page 81

CARING FOR YOUR WATER HEATER

Water Heater Inspections

Burner

It is recommended the burner be annually inspected 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.

Burner Sight Glass

Remove the plastic covers.

Remove 4 screws and the unit cover panel.

Open a hot water faucet.

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

NOTICE:

If you observe unusual burner operation, shut off the water heater and contact a qualified service technician.

Care Instructions

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

Page 82

CARING FOR YOUR WATER HEATER

Care and Cleaning

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 the next page.

Water Filter Cleaning

Turn water heater off. Unplug the water heater from electrical outlet or disconnect the power supply at the circuit breaker.

Cold Water Supply Shut-Off Valve

Care Instructions

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

Check the air intake and vent exhaust for blockage and/or debris.

Air Intake

Vent Exhaust

Turn off the water supply to the water heater.

Drain Valve

Drain the water heater. See "Draining the Water Heater" section.

Page 83

CARING FOR YOUR WATER HEATER

Care and Cleaning

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.

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

Air Filter Cleaning

It is recommended the air filter be annually inspected and cleaned.

DANGER:

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

Remove the plastic covers.

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.

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

Remove 4 screws and the unit cover panel.

Air Filter

Remove screw, and inspect and clean the air filter.

Reinstall the air filter, 5 screws and the plastic covers.

Screw

Care Instructions

Page 84

CARING FOR YOUR WATER HEATER

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.

• 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 and clean the water filter monthly. See “Water Filter Cleaning” section on this Use and Care Manual

for additional information.

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. Turn the water heater off. Open a hot water faucet until cold water is present and then test relief valve.

Care Instructions

• Annually check the operation of the pressure relief valve annually. 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.

Relief Valve

• Check for abnormal sound during normal operation (e.g., hissing or banging noises). Contact a qualified service technician or plumbing contractor if abnormal sounds are noted.

• Check all gas and water pipes for leaks. See "Leak Testing " on this Use and Care Manual.

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.

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.

Flushing of the heat exchanger is required for maintaining optimal efficiency. Flushing frequency is based on water conditions and average usage and should be conducted annually or as recommended by a professional. Failure to flush the unit consistently could result in higher operation costs or premature unit failure.

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.

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 "Water Quality" on this Use and Care Manual.

Page 85

CARING FOR YOUR WATER HEATER

SETTINGS

BACK ENTER

STATUS SERVICE MODE SETTINGS

BACK ENTER

STATUS SERVICE MODE

DISABLEENABLE/DISABLE

BACK ENTER

STATUS SERVICE MODE

DISABLEENABLE/DISABLE

Draining the Water Heater

WARNING:

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

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

Press the "MODE" button. After the LCD displays "ENABLE/DISABLE", press the "ENTER button.

Press the "▼" or "▲" button until "DISABLE" is displayed, and press the "ENTER" button.

Turn water heater off. Unplug the water heater from electrical outlet or disconnect the power supply at the circuit breaker.

Cold Water Supply Shut-Off Valve

Close the water shut-off valve.

Water Filters

Water Drain Plug

Find the water filter(s) and the water drain plug at bottom of the water heater.

Only applies to built-in pump models.

Care Instructions

Close the gas shut-off valve.

Using a suitable container to catch the water, remove the water drain plug located at bottom of the water heater, and the water filter(s).

Page 86

CARING FOR YOUR WATER HEATER

Draining the Water Heater (cont.)

Cold Water Supply Shut-Off Valve

Connect a garden hose to the drain valve on 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.

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 the water shut-off valve.

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

Open the gas shut-off valve(s).

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

Care Instructions

Reinstall the water filter(s), and the water drain plug.

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

Page 87

CARING FOR YOUR WATER HEATER

SETTINGS

BACK ENTER

STATUS SERVICE MODE

SET POINT

Draining the Water Heater (cont.)

Standard Drain Method

Service 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. These kits provide a means for full diagnostic testing and ease of system flushing and draining.

Cold Water Service Valve

Pressure Relif Valve

Flushing of the Heat Exchanger

Flush kit (RTG20124) is available to conduct flushing of the heat exchanger. Contact a store where tankless water heater is purchased to purchase the flush kit.

Set the highest available set point on a display. It should be 140F (60C). Follow the instructions at “Setting the Water Temperature” in this use and care manual to change set point.

Water Outlet

Drain

Care Instructions

Service

valve for hot

water

Service valve

for cold water

Unplug the water heater from electrical outlet or disconnect the power supply at the circuit breaker.

Hot Service Valve

Cold Service Valve

Follow the instructions at “Draining the Water Heater” in this use and care manual to drain the water heater, and close at cold and hot service valves V3 and V4.

Page 88

CARING FOR YOUR WATER HEATER

Flushing of the Heat Exchanger (cont.)

Cold Service Valve

Connect one side of hose of a circulating pump contained in the flush kit to cold service valve V2, and the other side to the pump outlet.

Hot Service Valve

Connect one side of the drain hose to hot service valve V1, and place the other side in the bucket.

Remove the drain hose from the bucket and route it to suitable drain. Close cold service valve V2, and open service valve V4 to flush the water heater with water. DO NOT open hot water service valve V3 at this time. Allow water to flow out of house for 5 minutes to rinse cleaning solution.

Close hot service valve V1, and open valve V3. Disconnect both hoses from service valves.

Cold Service Valve

Hot Service Valve

Pour no more than 2 gallons of virgin food grade white vinegar into the bucket, and place the circulating pump in the bucket.

Open cold and hot service valves V1 and V2.

Hot Service

Valve

Cold Service Valve

Connect power to the pump and allow to circulate vinegar for 45 minutes. After a minimum of 45 minutes unplug the circulating pump

minutes

Follow the instructions at “Water Filter Cleaning” in this use and care manual to clean the water filter, and plug in the power cord or reconnect the power supply at the circuit breaker.

NOTICE:

Recommend 120°F for the temperature setting when flushing procedure is completed.

Page 89

CARING FOR YOUR WATER HEATER

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 "Draining the Water Heater.

Freezing conditions come from the venting system on direct-vent models and from exposure to cold air models.

All water heaters are equipped with a freeze protection electric heater. This heater prevents freezing inside the water heater down to an outside temperature of approximately -30°F (-35°C) on indoor installations and approximately -4°F (-20°C) on outdoor installations. These temperatures are all based on temperatures without wind.

NOTE:

Models with built-in recirculation pump will activate recirculation for additional freeze protection (factory default setting).

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

Running Water Freeze Protection

Turn water heater off. Unplug the water heater from electrical outlet or disconnect the power supply at the circuit breaker.

Close the gas shut-off valve(s).

NOTICE:

Unplugging or disconnecting the power supply to the water heater will also disconnect the power to the freeze protection electric 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.

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.

Page 90

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 this Use and Care Manual.

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.

1. Unit is not ON. 1. Plug in the power cord or reconnect the

2. Water shut-off valve is not completely

opened.

3. Hot water faucet is not completely

opened.

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

5. Electrical power is disconnected or

water supply is shut off.

WARNING:

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

power supply at the circuit breaker box.

2. Check shut-off valve and open com-

pletely.

3. Open hot water faucet completely.

(The 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.

Care Instructions

3 94 11

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 heater

control.

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 82)

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.

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

7. Check and replace the mixing valve.

8. See “Service Error Code Chart” on

page 93. If required, contact a qualiﬁed service technician.

faucet.

contact a qualiﬁed service technician.

Page 91

CARING FOR YOUR WATER HEATER

Troubleshooting Chart

Problem Possible Cause Solution

Water not hot enough.

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

the remote control.

Water too hot.

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

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

4. Bleed-over in one of the hot water

ﬁxtures.

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

2. Water shut-off valve is not completely

opened.

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

contractor to verify the gas meter and gas piping size.

4. Contact a dealer or a qualiﬁed service

technician.

the remote control.

2. Check and completely open the water

shut-off valve.

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

Care Instructions

Fan continues to rotate after the hot water faucet is closed.

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

Page 92

SETTINGS

BACK ENTER

STATUS SERVICE MODE

SET POINT

SETTINGS

BACK ENTER

STATUS SERVICE MODE

Current Alarms

SETTINGS

BACK ENTER

STATUS SERVICE MODE

Clear Alarms?

SETTINGS

BACK ENTER

STATUS SERVICE MODE

Current Alarms

SETTINGS

BACK ENTER

STATUS SERVICE MODE

Clear Alarms?

SETTINGS

BACK ENTER

STATUS SERVICE MODE

Clear Alarms?

SETTINGS

BACK ENTER

STATUS SERVICE MODE

SET POINT

SETTINGS

BACK ENTER

STATUS SERVICE MODE

Current Alarms

SETTINGS

BACK ENTER

STATUS SERVICE MODE

Clear Alarms?

SETTINGS

BACK ENTER

STATUS SERVICE MODE

Yes

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 LCD on the User Interface. The chart on the next page 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, heater control, burners, vent connectors, or other safety devices. Refer repairs to a qualified service technician.

Press the “ENTER” button.

Clearing Error Codes

When an error code is displayed:

Turn off all the hot water faucets.

Care Instructions

Press the “SERVICE” button.

Press the “▼” or “▲” button until “Clear Alarms?” is displayed, and press the “ENTER” button.

Press the “▼” or “▲”button until “Yes” is displayed, and press the “ENTER” button. To exist this setting, press “BACK” button until the initial screen is displayed.

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 this Use and Care Manual.

NOTICE:

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

Page 93

CARING FOR YOUR WATER HEATER

Service Error Code Chart

Error Code Possible Cause Solution

A01L Water heater has buildup of lime deposits. Contact a dealer or qualiﬁed service technician.

A011 The gas shut-off valve is ot fully opened. Check shuf-off valve and open completely.

A012

A014 Water heater is overheating. Contact a dealer or qualiﬁed service technician.

A029 Blocked condensate line. Contact a dealer or qualiﬁed service technician.

A031 Faulty inlet water thermistor. Contact a dealer or qualiﬁed service technician.

A032 Faulty heat exchanger thermistor. Contact a dealer or qualiﬁed service technician.

A033 Faulty outlet water thermistor. Contact a dealer or qualiﬁed service technician.

A035 Improper thermistor connection. Contact a dealer or qualiﬁed service technician.

A036 Faulty exhaust thermistor. Contact a dealer or qualiﬁed service technician.

A055 Faulty gas valve. Contact a dealer or qualiﬁed service technician.

A061 Faulty blower motor. Contact a dealer or qualiﬁed service technician.

A063 (Built-in recirculation) pump abnormality. "SR models" only. Contact a dealer or qualiﬁed service technician.

A065 Faulty water ﬂow solenoid. Contact a dealer or qualiﬁed service technician.

A066 Faulty bypass solenoid. Contact a dealer or qualiﬁed service technician.

A070 Faulty control board. Contact a dealer or qualiﬁed service technician.

A071 Faulty gas solenoid valve. Contact a dealer or qualiﬁed service technician.

A072 Flame detected before ignition. Contact a dealer or qualiﬁed service technician.

A082 Software error. Contact a dealer or qualiﬁed service technician.

A090

T113 Not enough hot water to operate the unit. Increase the water ﬂow from the fuxtures.

T111

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.

Air intake or vent exhaust opening may be blocked. Remove any blockage. (Air intake requires 12 in [30 cm] of clearance.)

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

Blocked vent termination or inlet air ﬁlter. Contact a dealer or qualiﬁed service technician.

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

Contact a dealer or qualiﬁed service technician.

Care Instructions

IF YOU NEED SERVICE

Call for Assistance

1. All questions, adjustments, repairs, and/or 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 Manufacturer National Service Department at the following address:

Manufacturer National Service Department

800 Interstate Park Drive Suite 700 Montgomery, AL 36109 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 inside of the top panel 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.

Service Information

Page 94

IF YOU NEED SERVICE

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:

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.

Direct-Vent Gas

Components

Parts

Ref # Description

1 Control Board

2 Gas Valve

3 Burner Mesh

4 Blower Assembly

5 Venturi

6 Gas Inlet Connector

7 Water Control Valve

8 Water Inlet Connector

9 Inlet Water Filter

10 Hot Outlet Connector

11a Display Assembly "Non- WiFi"

11b Display Assembly "WiFi"

12 Condensate Trap

Ref # Description

13 Air Intake Connector

14 Flue Connector

15 Front Cover

16 Cabinet

17 Exhaust Duct Assembly

18 Gas Orifice Block

19 Burner Header

20 Gas Inlet Pipe

21 Air Filter

22 Ignitor

23 Flame Rod

24 Cover Screws

25 Plastic Screw Covers

Page 95

IF YOU NEED SERVICE

Direct-Vent Gas Components Recirculation Model

Ref # Description

1 Control Board

2 Gas Valve

3 Burner Mesh

4 Blower Assembly

5 Venturi

6 Gas Inlet Connector

7 Water Control Valve

8 Water Inlet Connector

9 Water Filter

10 Hot Outlet Connector

11 Display Assembly "WiFi"

12 Condensate Trap

13 Air Intake Connector

14 Flue Connector

Ref # Description

15 Front Cover

16 Cabinet

17 Exhaust Duct Assembly

18 Gas Orifice Block

19 Burner Header

20 Gas Inlet Pipe

21 Recirculation Connector

22 Recirculation Pump

23 Recirculation Pump Piping

24 Air Filter

25 Ignitor

26 Flame Rod

27 Cover Screws

28 Plastic Screw Covers

Page 96

NOTES