Rheem RHE40SP, RHE50P User Manual

To review or adjust tempture Step 1. Press the two temperature adjust buttons at the same time for 1 second. Step 2. To adjust, press COOLER or HOTTER button for desired temperature.

EMMERSON

SCALD RISK INCREASES WITH HOTTER WATER

Warning: This water heater is not suitable

for use in manufactured (mobile) homes!

Use & Care Manual

With Installation Instructions for the Installer

Residential Gas - FVIR Certified

High Efciency Condensing Power Direct Vent

Water Heaters

Residential 38 and 48 Gallon

The purpose of this manual is twofold: one, to provide the installer with the basic directions and recommendations for the proper installation and adjustment of the water heater; and two, for the owner–operator, to explain the features, operation, safety precautions, maintenance and troubleshooting of the water heater. This manual also includes a parts list.

It is very important that all persons who are expected to install, operate or adjust this water heater read the instructions carefully so they may understand how to perform these operations. If you do not understand these instructions or any terms within it, seek professional assistance.

Any questions regarding the operation, maintenance, service or warranty of this water heater should be directed to the seller from whom it was purchased. If additional information is required, refer to the section on “If you need service.”

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

Recognize this symbol as an indication of Important Safety Information!

California Proposition 65 Warning: This product contains chemicals known to the

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

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

FOR YOUR SAFETY!

— Do not store or use gasoline or other

flammable vapors or liquids or other combustible materials in the vicinity of this or any other appliance. To do so may result in an explosion or fire.

— 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.

● If you cannot reach your gas supplier, call

the fire department.

● Do not return to your home until authorized

by the gas supplier or fire department.

— Improper installation, adjustment, alteration,

service or maintenance can cause property damage, personal injury, or death. Refer to this manual. Installation and service must be performed by a qualified installer, service agency or the gas supplier.

● Immediately call your gas supplier from a

neighbor’s phone. Follow the gas supplier’s instructions.

Printed in USA

AP15411-1 (10/12)

Safety Information

Safety Precautions ...... 3–6

LP Gas Models ........... 5

Installation Instructions

Location ................. 7

Water Supply

Connections ............. 9

Condensate

Management ............ 10

Gas Supply ..............11

Vent and Combustion

Air Inlet .............12-20

Wiring Diagram ..........21

Pipe Insulation ........22,23

Heat Traps ..............23

Installation Checklist .....25

Potable/Space Heating ... 26

Operating Instructions

FOR YOUR RECORDS

Write the model and serial numbers here:

You can find them on a label on the appliance.

Staple sales slip or cancelled check here.

Proof of the original purchase date is needed to obtain service under the warranty.

READ THIS MANUAL

Inside you will find many helpful hints on how to use and maintain your water heater properly. A little preventive care on your part can save you time and money over the life of your water heater.

You’ll find many answers to common problems in the Troubleshooting Guide. If you review the chart of Troubleshooting Tips first, you may not need to call for service.

Lighting Instructions .... 27

Water Temperature ... 28, 29

Care and Cleaning

Draining ............... 31

Maintenance ............ 31

Burner Inspection ....... 32

Vent System Inspection .. 32

Extended Shut-Down .....32

Troubleshooting Tips

Before You Call

For Service .......... 33, 34

Gas Control LED Error

Codes ...................35

Customer Service

Parts List ............... 36

Alternate Vent Termination

Instructions .......... 37, 38

If You Need Service .......40

READ THE SAFETY INFORMATION

Your safety and the safety of others are very important. There are many important safety messages in this manual and on your appliance. Always read and obey all safety messages.

This is the safety alert symbol. Recognize this symbol as an indication of Important Safety Information!

This symbol alerts you to potential hazards that can kill or hurt you and others.

All safety messages will follow the safety alert symbol and either the word “DANGER”, “WARNING”, “CAUTION” or “NOTICE”.

These words mean:

DANGER: An imminently hazardous situation

that will result in death or serious injury.

WARNING: A potentially hazardous situation that

could result in death or serious injury and/or damage to property.

CAUTION: A potentially hazardous situation that

may result in minor or moderate injury.

NOTICE: Attention is called to observe a

specified procedure or maintain a specific condition.

IMPORTANT SAFETY INFORMATION 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 serious bodily injury or death. Should you have problems understanding the instructions in this manual, or have any questions, STOP, and get help from a qualified service technician, or the local gas utility.

NOTICE: This water heater is equipped with a flammable vapor sensor that will automatically shut down the water heater in the presence of gasoline vapors and some other flammable vapors. If the flammable vapor sensor shuts down the water heater, contact a qualified service technician. Clear any hazardous materials and ventilate the area around the water heater. Do not turn off the appliance or adjust the ON/OFF switch in any way. Do not tamper with the flammable vapor sensor. Do not submerse the flammable vapor sensor in water. Do not allow the flammable vapor sensor to come into contact with any substances such as bleach or cleaners. See the “Gas Control LED Error Codes” Section of this manual for a list of error codes.

DANGER!

PROPERLY VENT THE WATER HEATER

Failure to properly vent the water heater as outlined in the Vent and Combustion Air-

Inlet Section of the Installation Instructions in this manual can result in unsafe operation of the water heater. To avoid the risk of fire, explosion, or asphyxiation from carbon monoxide, never operate this water heater unless both the vent and combustion air-inlet systems are properly installed. Be sure to inspect both the vent and the combustion airinlet for proper installation at initial start-up; and at least periodically thereafter. Refer to the Care and Cleaning section of this manual for more information regarding vent and combustion air-inlet system inspection.

WARNING!

Gasoline, as well as other flammable materials and liquids (which include but are not limited to adhesives, solvents, paint thinners etc.), and the vapors they produce are extremely dangerous. DO NOT handle, use or store gasoline or other flammable or combustible materials anywhere near or in the vicinity of a water heater or any other appliance. Be sure to read and follow warning label pictured below and other labels on the water heater, as well as the warnings printed in this manual. Failure to do so can result in property damage, bodily injury or death.

W ARNING

FLAMMABLES

Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance. Storage of or use of gasoline or other flammable vapors or liquids in the vicinity of this or any other

appliance can result in serious injury or death.

Flammable Vapors

FIRE AND EXPLOSION HAZARD

Can result in serious injury or death.

IMPORTANT SAFETY INFORMATION

VAC

A B C

HOTTERCOOLER

SCALDING RISK INCREASES WITH HOTTER WATER

READ ALL INSTRUCTIONS BEFORE USING

DANGER!

WATER TEMPERATURE SETTING

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

NOTICE: Mixing valves are available for reducing point of use water temperature by mixing hot and cold water in branch water lines. Contact a licensed plumber or the local plumbing authority for further information.

Time/Temperature Relationship in Scalds

Water Temperature Time To Produce a Serious Burn

120°F More than 5 minutes

125°F 11/2 to 2 minutes

130°F About 30 seconds

135°F About 10 seconds

140°F Less than 5 seconds

145°F Less than 3 seconds

150°F About 11/2 seconds

155°F About 1 second

Table courtesy of Shriners Burn Institute

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

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

Maximum water temperatures occur just after the burner has shut off. To find water temperature being delivered, turn on a hot water faucet and place a thermometer in the water stream and read the thermometer. (See page 28 and 29 for more details.)

The temperature of the water in the heater can be regulated by pressing

the "COOLER" or "HOTTER"

arrow buttons on the front of the gas control

(thermostat). To comply with safety regulations the gas control (thermostat) was set at its lowest setting before the water heater was shipped from the factory.

The illustration below shows the approximate water temperature for each LED Indicator on the Gas Control (Thermostat) Temperature Display.

DANGER: Hotter water increases the potential for Hot Water SCALDS.

Temperature Setting

VAC = approx. 70°F

• = approx. 110°F

• and ▲ = approx. 115°F

Both

▲= approx. 120°F

Both ▲and A= approx. 125°F

A = approx. 130°F

Both A and B = approx. 135°F

B = approx. 140°F

Both B and C = approx. 145°F

C = approx. 150°F

C-Flashing = approx. 160°F

Display

VA C ▲ A B C

● ○ ○ ○ ○ ○ ○ ● ○ ○ ○ ○ ○ ● ● ○ ○ ○ ○ ○ ● ○ ○ ○ ○ ○ ● ● ○ ○ ○ ○ ○ ● ○ ○ ○ ○ ○ ● ● ○ ○ ○ ○ ○ ● ○ ○ ○ ○ ○ ● ● ○ ○ ○ ○ ○ ● ○ ○ ○ ○ ○ ●

Burns on Adult Skin

--------------------

More than 5 minutes

1-1/2 to 2 minutes

About 30 seconds

About 10 seconds

Less than 5 seconds

Less than 3 seconds

About 1-1/2 seconds

About 1/2 seconds

DANGER!

LIQUEFIED PETROLEUM (LP PROPANE OR BUTANE) AND NATURAL GAS MODELS

LP and Natural gas have an odorant added to aid in detecting a gas leak. Some people may not physically be able to smell or recognize this odorant. If you are unsure or unfamiliar with the smell of LP or natural gas, ask the gas supplier. Other conditions, such as “odorant fade”, which causes the odorant to diminish in intensity, can also hide or camouflage a gas leak.

● Water heaters utilizing LP gas are

different from natural gas models. A natural gas water heater will not function safely on LP gas and vice versa.

● No attempt should ever be made to

convert the water heater from natural gas to LP gas. To avoid possible equipment damage, personal injury or fire, do not connect the water heater to a fuel type not in accordance with the unit data plate. LP for LP units. Natural gas for natural gas units. These units are not certified for any other fuel type.

● LP appliances should not be installed

below grade (for example, in a basement) if such installation is prohibited by federal, state and/or local laws, rules, regulations or customs.

● LP gas must be used with great caution.

It is heavier than air and will collect first in lower areas making it hard to detect at nose level.

● Before attempting to light the water

heater, make sure to look and smell for gas leaks. Use a soapy solution to check all gas fittings and connections. Bubbling at a connection indicates a leak that must be corrected. When smelling to detect a gas leak, be sure to sniff near the floor also.

● Gas detectors are recommended in LP

& natural gas applications and their installation should be in accordance with the detector manufacturer’s recommendations and/or local laws, rules, regulations or customs.

● It is recommended that more than one

method, such as soapy solution, gas detectors, etc., be used to detect leaks in gas applications.

DANGER: If a gas leak is present or

suspected:

● Do not attempt to find the cause

yourself.

● Do not try to light any appliance.

● Do not touch any electrical switch.

● Do not use any phone in your building.

● Leave the house immediately and make

sure your family and pets leave also.

● Leave the doors open for ventilation

and contact the gas supplier, a qualified service agency or the fire department.

● Stay away from the house (or building)

until the service call has been made, the leak is corrected and a qualified agency has determined the area to be safe.

IMPORTANT SAFETY INFORMATION

READ ALL INSTRUCTIONS BEFORE USING

WARNING!

For your safety, the information in this manual must be followed to minimize the risk of fire or explosion, electric shock, or to prevent property damage, personal injury, or loss of life.

FOR INSTALLATIONS IN THE STATE OF CALIFORNIA

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

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

SAFETY PRECAUTIONS

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

● Read this manual entirely before installing

or operating the water heater.

● Use this appliance only for its intended

purpose as described in this Use and Care Manual.

● Be sure your appliance 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 technician.

READ AND FOLLOW THIS SAFETY INFORMATION CAREFULLY.

SAVE THESE INSTRUCTIONS

IMPORTANT

Carefully inspect the water heater for damage before proceeding with the installation.

If you find damage to the condensate trap, PVC pipes, gas control (thermostat) or the

blower assembly, DO NOT install or attempt any repair to the water heater. Contact the

manufacturer as detailed under "IF YOU NEED SERVICE" section of this manual.

Installing the water heater

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. A copy can be purchased from either the American Gas Association, 400 N. Capitol Street NW, Washington, DC 20001 as ANSI standard Z223.1 or National Fire Protection Association, 1 Batterymarch Park, Quincy, MA 02269 as booklet NFPA 54.

Location

a location where it may be subjected to ambient temperatures exceeding 125°F.

● The water heater should be installed so

as to minimize the length of vent and combustion air-inlet pipe(s) and the number of vent and combination airinlet connection fittings required.

● Hot water lines should be insulated to

conserve water and energy.

● The water heater should be installed

close to a condensate drain.

● The water heater, condensate lines, and

water lines should be protected from exposure to freezing temperatures.

● DO NOT install this water heater

outdoors.

● Minimum clearance from combustible

construction:

Front* Side Rear Top**

0" 0" 0” 12”

* "Front" clearance dimension is measured from front of control to the closet door.

** "Top" clearance dimension is measured from the top pan of the water heater to the ceiling.

If the clearances stated on the Instruction/ Warning Label, located on the front of the heater differ, install the water heater according to the clearances stated on the label.

● If the water heater is installed in an

alcove or closet, the entire floor must be covered by a wood or metal panel. A minimum of 24” clearance from the front and top should be available for adequate inspection and servicing.

● The water heater may be installed on

combustible floors, but not directly on carpeting. If the water heater must be installed on carpeting, place a metal or wood panel beneath the water heater, extending beyond its full width and depth at least 3” in all directions.

Max.

2.75”

Flammable Vapor Sensor

The auxiliary catch pan installation MUST conform to local codes.

NOTICE: DO NOT allow the catch pan to obstruct the flammable vapor sensor.

NOTICE: DO NOT allow the flammable vapor sensor to become submerged in water. Make sure the catch pan is properly drained.

WARNING: Combustible construction refers to adjacent walls and ceilings and should not be confused with combustible or flammable products and materials. Combustible and/or flammable products and materials should never be stored in the vicinity of this or any gas appliance.

Diameter of water heater plus 2” min.

The water heater should not be located in an area where leakage from the tank or connections will result in damage to the area adjacent to the heater or to lower floors of the structure.

When such areas cannot be avoided it is recommended that a suitable catch pan, adequately drained, must be installed under the water heater.

The water heater must be centered in the catch pan.

Catch pan kits are available from the store where the water heater was purchased, or any water heater distributor.

Make certain the floor underneath the water heater is strong enough to sufficiently support the weight of the water heater once it is filled with water.

A gas fired water heater or any other appliance should not be installed in a space where liquids which give off flammable vapors are to be used or stored. Such liquids include gasoline, LP gas (butane or propane), paint or adhesives and their thinners, solvents or removers.

DO NOT obstruct or block the

Flammable Vapor Sensor.

Because of natural air movement in a room or other enclosed space, flammable vapors can be carried some distance from where liquids which give off flammable vapors are to be used or stored. The open flame of the water heater’s main burner can ignite these vapors and create a shut

down condition of the water heater which will not allow the water heater to ignite until examined by a Qualified Service Technician.

FVIR certified gas water heaters can be installed on a residential garage floor without the use of an 18-inch stand in accordance with the National Fuel Gas Code, NFPA 54, ANSI Z223.1, unless otherwise directed by State and Local code requirements. The water heater must be located so it is not subject to physical damage, for example, by moving vehicles, area flooding, etc.

● DO NOT install the water heater in

Installing the water heater

Corrosive Atmospheres

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

The air in beauty shops, dry cleaning establishments, photo processing labs, and storage areas for liquid and powdered bleaches or swimming pool chemicals often contain such halogenated hydrocarbons.

An air supply containing halogenated hydrocarbons may be safe to breathe, but when it passes through a gas flame corrosive elements are released that

Thermal Expansion

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 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 supply line, and the result of “thermal expansion” can create a rapid and dangerous pressure increase in the water heater and system

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.

The water heater warranty is voided when failure of the water heater is due to operation in a corrosive atmosphere.

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 possibly the heater itself. 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 (see illustration on right). The expansion tank is designed with an air cushion built in that compresses as the system pressure increases, thereby relieving the over pressure condition and eliminating the repeated operation of the relief valve. Other methods of controlling thermal expansion are also available. Contact your installing contractor, water supplier or plumbing inspector for additional information regarding this subject.

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 cold water connections on heater. Any heat applied to the cold water supply fittings will permanently damage the dip tube and heat traps.

Water Supply Connections

Refer to the illustration below for suggested typical installation. The installation of unions or flexible copper connectors is recommended on the hot and cold water connections so that the water heater may be easily disconnected for servicing if necessary. The HOT and COLD water connections are clearly marked and are 3/4” NPT on all models. Install a shut-off valve in the cold water line near the water heater.

IMPORTANT: It is recommended that the hot and cold water piping have a minimum vertical height of 10" from

the top of the water heater before the transition into any elbow. This vertical height is needed in order to provide adequate clearance for top cap installation and removal.

To gain access to the hot and cold water connections on water heater remove the two (2) screws that secure the top cap to the water heater then pull the top cap upward and off the water heater. See illustration of top cap and screws on pages 23 & 36.

NOTICE: The National Fuel Gas Code (NFGC) mandates a manual gas shut-off valve: See (NFGC) for complete instructions. Local codes or plumbing authority requirements may vary from the instructions or diagrams provided and take precedent over these instructions.

Typical Installation

Air inlet connector

Heat trap 6” minimum recommended

Hot water outlet to

Manual gas shut-off

fixtures

Temperature and pressure

(T&P) relief valve

Water Heater Jacket

To gas supply

Ground joint union

(Recommended)

Union

Air inlet

Vent

Blower assembly

* Typical for

both sides

1/8” per foot minimum slope upward for horizontal venting.

Union (Recommended)

Vacuum Relief Valve

*10" min.

Shut-off valve

Thermal expansion tank (if required)

Relief valve discharge line to suitable open drain.

Heat trap 6” minimum recommended

Shut-off valve

To cold water supply

Condensate line

to suitable drain

Sediment

trap

Cap

Condensate Trap

Gas Control (Thermostat)

Flammable Vapor Sensor

Auxiliary catch pan

On/Off switch

Drain Pan Pipe to suitable drain.

Drain valve

6” Air gap

Installing the water heater

A new combination temperature and pressure relief valve, complying with the Standard for Relief Valves

and Automatic Gas Shut-Off Devices for Hot Water Supply Systems, ANSI Z21.22, is supplied and must remain in the opening provided and marked for the purpose on the water heater. No valve of any type should be installed between the relief valve and the tank. Local codes shall govern the installation of relief valves.

Relief Valve

The pressure rating of the relief valve must not exceed 150 PSI, the maximum working pressure of the water heater as marked on the rating plate.

The Btuh rating of the relief valve must equal or exceed the Btuh input of the water heater as marked on its rating plate.

Position the outlet of the relief valve above a suitable open drain to eliminate potential water damage. Piping used should be of a type approved for hot water

distribution.

The discharge line must be no smaller than the outlet of the valve and must pitch downward from the valve to allow complete drainage (by gravity) of the relief valve and discharge line.

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

WARNING: The tank must be full of water before heater is turned on. The water heater warranty does not cover damage or failure resulting from operation with an empty or partially empty tank.

Condensate Trap

Condensate Riser

(1/2" PVC pipe

supplied)

1/2" PVC tee (supplied)

Downward Slope

Drain Line

Condensate Drain

NOTICE: If water appears on the floor DO NOT assume the tank in leaking, check venting and condensate line connections.

NOTICE: Water Heater should be leveled for proper condensate drainage.

6" air gap

To Fill the Water Heater

Make certain that the drain valve is closed, then open the shut-off valve in the cold water supply line.

Open each hot water faucet slowly to allow the air to vent from the water heater and piping.

Condensate Management

This water heater generates condensate and requires a drain to be located in close proximity to allow condensate to drain safely. The drain line and fittings should be installed per installation instructions.

Be sure the condensate runs freely to the drain and does not accumulate in the condensate trap or the condensate line. In cold climates, precautions may need to be taken to ensure that the condensate drain lines do not freeze. A water proof heat tape may be used to prevent freezing of condensate lines.

It is recommended that the condensate trap be primed by filling the trap with 1/4 cup of tap water before connecting the drain lines.

• Condensate is mildly acidic and should be collected and disposed per local codes. Certain local codes require condensate to be neutralized before it is disposed. Neutralizer kits are available. Contact your installer or plumbing contractor.

• Use only PVC, CPVC pipe or flexible tubing suitable for use with flue condensate as drain line. If flexible tubing is used ensure that there are no bends or twists and has gradual slope to condensate drain.

A steady flow of water from the hot water faucet(s) indicates a full water heater.

Do not allow the flammable vapor sensor to become submerged in water.

• The drain line (along its entire length) must be at least the same diameter as the drain of the condensate trap (1/2”).

• The drain line must be short as possible and have a downward slope towards the condensate drain. If suitable slope is not provided, the drain line can get blocked and will cause improper operation of the water heater. If a downward slope cannot be provided, a condensate pump should be used to pump condensate to a suitable drain.

• The end of the drain line should be open to the atmosphere. The end should not be under water.

• Do not connect the drain line directly to the sewer drain.

• Do not connect the drain line with drains from other appliances.

• Do not drain condensate into the water heater drain pan.

• Do not drain condensate over public way, walkway or other areas where it will create slippery condition, which could lead to personal injury.

WARNING: Do not attempt to convert this water heater for use with a different type of gas other than the type

shown on the rating plate. Such conversion could result in hazardous operating conditions.

Gas Supply

The branch gas supply line to the water heater should be a clean 1/2” black steel pipe or other approved gas piping material.

A ground joint union or ANSI design certified semi-rigid or flexible gas appliance connector should be installed in the gas line close to the water heater. The National Fuel Gas Code (NFGC) mandates a manual gas shut-off valve: See (NFGC) for complete instructions.

If flexible connectors are used, the maximum length shall not exceed 36” and must meet the requirements in ANSI Z21.24-Connectors for Gas Appliances.

If lever type gas shut-offs are used, they shall be T-Handle type.

Compound used on the threaded joints of the gas piping must be of the type resistant to the action of LP gas. Use compound sparingly on male threads only.

Where a sediment trap is not incorporated as part of the appliance, a sediment trap shall be installed downstream of the equipment shutoff valve as close to

the inlet of the appliance as practical at the time the appliance installation. The sediment trap shall be either a tee fitting with a capped nipple in the bottom outlet or other device recognized as an effective sediment trap.

Do not use excessive force (over 31.5 ft lbs.) in tightening the pipe joint at the gas control (thermostat) inlet, particularly if teflon pipe compound is used, as the valve body may be damaged.

The minimum inlet gas pressure (with main burner on) to the water heater must be a minimum of 5” w.c. for natural gas, and a minimum of 11” w.c. for LP gas. The maximum inlet pressure to the water heater must not exceed 14" w.c. for natural gas and 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.

WARNING: Never use an open flame to test for gas leaks, as property damage, personal injury, or death could result.

Leak Testing

The water heater and its gas connections must be leak tested at normal operating pressures before it is placed in operation.

Turn on the manual gas shut-off

valve near the water heater.

Use a soapy water solution to test for

leaks at all connections and fittings.

Bubbles indicate a gas leak that must be corrected.

The factory connections to the gas control (thermostat) should also be leak tested after the water heater is placed in operation.

Pressure Testing the Gas Supply System

The water heater and its manual gas shut-off valve must be disconnected from the gas supply piping system during any pressure testing of that system at pressures in excess of 1/2 psi (14” w.c.).

The water heater must be isolated from the gas piping system by closing the manual gas shut-off valve during any pressure testing of the gas supply piping at pressures equal to or less than 1/2 psi (14” w.c.).

Installing the water heater

WARNING: Failure to install a water heater suitable for the altitude at the location it is intended to serve, can result in improper operation of the appliance resulting in property damage and/or producing carbon monoxide gas, which could result in personal injury, or death.

DANGER: To avoid the risk of fire, explosion, or asphyxiation from carbon

monoxide, NEVER operate

the water heater unless it is properly vented and the

Vent and Combustion Air

Inlet systems are properly installed as detailed in the

"Vent and Combustion

Air Inlet" section of this manual.

The vent pipe must overlap a minimum of ½” on each connection. It is important that the vent pipe engages fully into any pipe fitting and be kept in that position until the adhesive has fully cured. DO NOT drill or punch holes in the vent or combustion air inlet pipe or fittings.

NOTICE: This unit is equipped with a Flammable

Vapor Sensor. Do not

apply power until enough time has passed to allow the vapors from the primer and cement to dissipate.

Additional installation information for The Commonwealth of Massachusetts is located on the back page of this manual.

High Altitude

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. This water heater can be installed at elevations up to 5,999 feet without any change or modification.

Vent and Combustion Air Inlet

This water heater is a direct vent appliance and must be installed so that all air for combustion is derived directly from the outside atmosphere and all flue gases are discharged to the outside atmosphere. For proper installation of the vent and combustion air-inlet systems, follow the instructions as detailed in this manual.

DO NOT connect this water heater to an existing vent or chimney - it must be vented separately from all other appliances.

NOTICE: This water heater is approved to use the following materials for vent and combustion air-inlet systems:

PVC (Schedule 40, Cellular Core, ASTM-F891)

PVC (DWV, ASTM-D2665)

PVC (Schedule 40, ASTM-D1785)

PVC (SDR Series, ASTM-D2241)

CPVC (CPVC 4120, ASTM-D2846)

CPVC (Schedule 40, ASTM-F441)

CPVC (SDR Series, ASTM-F442)

ABS (Schedule 40, DWV, ASTM-D2661)

ABS (Schedule 40, DWV, Cellular Core, ASTM-F628)

DO NOT mix ABS pipe and fittings

with PVC or CPVC pipe fittings.

NOTICE: It is acceptable to

interchange PVC and CPVC pipe and

fittings.

The unit may be vented horizontally through a wall or vertically through the roof.

Vent and combustion air inlet pipe runs must be adequately supported along both vertical and horizontal lengths.

Maximum unsupported length is recommended to be no more than 4 feet.

For installation between 6,000 and 8,999 feet, refer to the Venting Information tables on page 13 for maximum vent lengths.

Installations above 8,999 feet are not authorized.

Contact the local gas supplier for more information.

It is imperative that the first hanger be located on the horizontal length immediately adjacent to the first 90-degree elbow from the vertical rise of vent pipe connected to the water heater.

The support method used should isolate the vent and combustion air inlet pipes from floor joists or other structural members to help prevent the transmission of noise and vibration.

Do not support, pin or otherwise secure the vent and combustion air inlet systems in a way that restricts the normal thermal expansion and contraction of the chosen vent material and air inlet pipe.

If the water heater is being installed as a replacement for an existing power vented water heater, a thorough inspection of the existing vent and combustion air inlet system must be performed prior to any installation work.

Verify that the correct materials as detailed above have been used, and that the minimum or maximum vent and combustion air inlet length and terminal locations as detailed in this manual have been met.

Carefully inspect the entire vent and combustion air inlet systems pipes for any signs of cracks or fractures, particularly at the joints between elbows or other fittings and the straight length of vent pipe.

Check the vent and combustion air inlet systems for signs of sagging or other stresses in the joints as a result of misalignment of any components in the systems.

If any of these conditions are found, they must be corrected in accordance with the instructions in this manual before completing the installation and putting the water heater into service.

The Minimum and Maximum equivalent lengths for the vent and combustion air-inlet systems are shown in Table 1.

*Use only Rheem 3 inch concentric termination kit (SP20245). The use of any other kit is not approved. Contact your installer or local distributor for assistance. Refer to page 37 & 38 for installation of alternate concentric vent termination.

Table 1

From 0 ft. through 5,999 ft.

Model

38 and 48

Gallon Heaters

Model

38 and 48

Gallon Heaters

Vent & Combustion

Air-Inlet System

Diameter

Inches Feet Feet

2 7 30 90° Elbows Concentric*

3 7 60 90° Elbows Concentric*

Vent & Combustion

Air-Inlet System

Diameter

Inches Feet Feet

2 Not allowed Not allowed ------------ ------------

3 7 45 90° Elbows Concentric*

Min. Allowed Equivalent

Vent & Combustion Air-

Inlet Lengths (Each Pipe

Run)

Max. Allowed Equivalent

Vent & Combustion Air-

Inlet Lengths (Each Pipe

From 6,000 ft. through 8,999 ft.

Min. Allowed Equivalent

Vent & Combustion Air-

Inlet Lengths (Each Pipe

Run)

Max. Allowed Equivalent

Vent & Combustion Air-

Inlet Lengths (Each Pipe

Run)

Vent and Combustion Air-Inlet

System Termination(s)

Vent and Combustion Air-Inlet

System Termination(s)

NOTICE: A 90° elbow is equivalent to 5 ft. of straight pipe. A 45° elbow is equivalent to 2.5 ft. of straight pipe. The use of a 45° elbow is preferred over a 90° elbow. The vent and combustion air-inlet terminations are not included in the equivalency calculations.

NOTICE: The mixing of 2" and 3" piping is not allowed. If 3" pipe is used, a 3" to 2" reducer fitting is allowed at the vent connector fitting.

This water heater is supplied with a 2" PVC (Schedule 40) 90° vent terminal. When venting with 3" pipe, Schedule 40 PVC 90° vent terminals must be used. Screens for both 2" and 3" vent

3 in. diameter pipe

2 in. pipe diameter Min. 2 1/2 in. to

6 in. Max. Spacing

Vent Connector Fitting

Vent

3 in. diameter pipe

Combustion air-inlet

Min. 2 1/2 in. to 6 in. Max. Spacing

Rubber Coupling 2 in. pipe diameter

terminals have been included.

Wind vane for 3" combustion inlet terminals have been included. Wind vane should be cemented to the combustion intake terminal using PVC cement. Wind vane should be cemented as shown in figure on page 16.

IMPORTANT: Ensure that all the coupling clamps are tightened before allowing the water heater to operate.

When using PVC, CPVC or ABS pipe and fittings, use 90° elbows of the corresponding size and material for the vent

• Maintain a minimum vertical height of 6 in. of pipe,

including pipe increasers (if used), from the blower exhaust coupling before a transition into any elbow.

Elbows are limited to a total equivalent length of 20 ft. (6 m). Maximum allowed four (4) 90° elbows or eight (8) 45° elbows.

terminal and combustion air-inlet terminals.

Additional Fitting Considerations

Examples of Elbows:

DO NOT use short sweep elbows. It is recommended to use only standard and/or long sweep elbows. See examples as shown.

DO NOT use.

GOOD

BEST

Short Sweep 90° Elbow

Standard 90° Elbow

Long Sweep 90° Elbow

Installing the Water Heater

Direct Vent Terminal Location

FIXED

CLOSED

ERAB

FIXED

CLOSED

PERABLE

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

V Vent Terminal X Air Supply Inlet Area Where Terminal Is Not Permitted

A = Clearance above grade, veranda, porch,

US Installations

1 ft.

deck or balcony

B = Clearance to window or door that may be

opened

6 in. for appliances ≤ 10,000 Btuh , 9 in. for appliances > 10,000 Btuh and ≤ 50,000 Btuh,

12 in. for appliances> 50,000 Btuh

C = Clearance to permanently closed window *

D = Vertical clearance to ventilated soft lo-

cated above the terminal within a horizontal distance of 2 feet from the center line of the terminal

E - Clearance to unventilated soft *

F - Clearance to outside corner *

G - Clearance to inside corner *

H - Clearance to each side of centerline extend-

ed above meter/regulator assembly

I - Clearance to service regulator vent outlet *

J - Clearance to nonmechanical air supply inlet

to building or the combustion air inlet to any other appliance

6 in. for appliances ≤ 10,000 Btuh, 9 in. for appliances > 10,000 Btuh and ≤ 50,000 Btuh,

12 in. for appliances> 50,000 Btuh

K - Clearance to a mechanical air supply inlet 3 ft. above if within 10 ft. horizontally

L - Clearance above paved sidewalk or paved

driveway located on public property

M - Clearance under veranda, porch, deck, or

balcony

In accordance with the current ANSI Z223.1/ NFPA 54 National Fuel Gas Code

* For clearances not specied in ANSI Z223.1/ NFPA 54 the following statement shall be included:

"Clearance in accordance with local installation codes and the requirements of the gas supplier and the manufacturer's installation

instructions".

WARNING: Moisture in the flue gas will condense as it

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

Inside corner

Caulk

12 in. min. above grade or above anticipated snow level

6 ft. Caulk zone or to edge of window etc., starting within 6 ft.

Rising moisture will collect under eves

4 ft.

Vent

Terminal

Combustion Air-Inlet terminal

Wind Vane

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

Terminal Location Additional Considerations

DO NOT install the vent terminal under any patio or deck.

To help prevent moisture from freezing on walls and under

eaves, do not locate the vent terminal on the side of a building with prevailing winter winds.

When terminating the vent and combustion air-inlet pipes

through brick or masonry surfaces, the installation of a rust resistant sheet metal backing plates behind the vent and combustion air-inlet terminals are recommended.

DO NOT locate the vent terminal too close to shrubbery, as

flue gasses may damage them.

Caulk all cracks, seams and joints within 6 ft. of the vent

and combustion air-inlet terminals.

In cold climates, precautions may need to be taken to ensure

that the condensate in the vent pipe does not freeze.

Support horizontal sections of the vent and combustion

air-inlet pipe every 4 ft. DO NOT rigidly secure the vent system. Provisions must be made to allow for expansion and contraction of the vent system.

DO NOT install the vent and combustion air-inlet terminals

less than 1 ft. above grade or above average snowfall whichever is greater.

Permanently seal annular openings around the vent and

combustion air-inlet system penetrations using approved materials to prevent entry of combustion products into the building.

NOTICE: The vent and combustion airinlet systems of this water heater may be installed horizontally through a wall or vertically through the roof.

The vent and combustion air-inlet terminals of the water heater must be installed in the same atmospheric pressure zone.

Exhaust Vent Terminal

12 in. Min.

Combustion AirInlet Terminal

Wind Vane

Horizontal Vent and Combustion Air-Inlet Terminal

Installation

Determine the locations for the vent and combustion air-inlet terminals per information on previous page and section above, then make two (2) holes through the exterior wall to accommodate the vent and combustion air-inlet pipes.

• Maintain a minimum horizontal distance of 12 in. between the vent and combustion airinlet terminal center lines.

Insert lengths of vent and combustion air-inlet pipes through the wall as shown.

• Allow sufficient length of pipe to extend beyond the exterior wall of the building for attachment of the vent and combustion airinlet terminals.

• Maintain a minimum distance from the vent and combustion air-inlet terminals of not less than 1 ft. above grade or above average snowfall whichever is greater.

When installing 3" vent terminals install the supplied 1/2 in. mesh metal screens inside each terminal fitting.

Connect the terminals to the vent and combustion air-inlet pipes which are extending out of the building.

• Ensure that the back of the supplied terminals are flush with the outside wall surface.

Complete the installation of the remainder of the vent system and attach it to the vent connector fitting on the water heater’s blower assembly.

• Horizontal lengths of the vent system must slope upward a minimum of 1/8 in. per foot as shown in figure on next page.

Installing the water heater

Horizontal Vent and Combustion Air-Inlet Terminal Installation

continued -

Complete the installation of the remainder of the combustion air-inlet system and attach it to the combustion air-inlet connector fitting on the water heater’s combustion air-inlet tube assembly.

Support vertical and horizontal lengths of the vent and combustion air-inlet systems as previously mentioned.

2 ft. x 2 ft. Sheet Metal Shield on Brick or Masonry Walls (Optional for air inlet termination)

Combustion Air-Inlet

Terminals with 1/2 in. Mesh Protective Screens Inside

Exhaust Vent

Slope horizontal pipe upward 1/8 in. per foot min.

Min 6 in.

Vent Connector Fitting

.008

.010

-B-

Combustion Air-Inlet

Top Pan

Horizontal Vent and Combustion Air-Inlet Terminal Installation

90° Elbow

Inside of Building

Rear of Termination Flush with Outside of Wall

Outside of Building

Vent Pipe termination

Wind Vane on Combustion Air-Inlet Termination

Wind Vane

The illustration on the left is a enlarged

view of the elbow, "Wind Vane", and

screen assembly which must be installed on the Combustion Air-Inlet Termination.

Screen

Alternate Horizontal Vent and Combustion Air-Inlet Terminal Installation

-B-

.008

.010

Exhaust Vent

Slope horizontal pipe upward 1/8

Slope horizontal pipe upward 1/8 in. per foot min.

in. per foot min.

2 ft. x 2 ft. Sheet Metal Shield on Brick or Masonry Walls (Optional for air inlet termination)

Wind Vane on Combustion Air-Inlet Terminal

Rear of Termination Flush with Outside of Wall

Outside of Building

Min 6 in.

Vent Connector Fitting

Combustion Air-Inlet

Slope horizontal pipe upward 1/8 in. per foot min.

Inside of Building

Horizontal Vent and Combustion Air-Inlet Alternate Vent Riser Terminal

Installation

Maintain a minimum distance from the vent and combustion air-inlet terminals of not less than 1 ft. above grade or above average snowfall whichever is greater.

Connect the vent riser assemblies to the vent and combustion air-inlet pipes which are extending out of the building.

• Ensure that the back of the 90° elbows are flush with the outside wall surface and that the vent and combustion air-inlet terminations of the vent risers are parallel with the outside wall.

IMPORTANT: Remember to include the additional 90° elbows and vertical height of the vent and combustion air-inlet pipes of the vent riser when calculating the maximum equivalent vent and combustion air-inlet system lengths. The maximum equivalent vent and combustion air-inlet system lengths must be as specified on page

13.

Front View

Option 1

Terminal assemblies to be parallel to wall.

Short piece of pipe

Vent Outlet

12 in.

min.

Wind Vane

Combustion Air

Inlet

Termination Openings 12 in. min. above grade or above anticipated snow level

Vent Outlet

Front View

Option 2

Terminal assemblies to be parallel to wall

Short piece of pipe

Combustion Air

Wind Vane

12 in. min.

Inlet

Side View

Rear of elbow flush

with outside wall

* Clearance is equal and

parallel to wall

Installing the Water Heater

Vertical Vent and Combustion Air-Inlet Installation

The location of the vent and combustion air-inlet terminals depends on the following minimum clearances and considerations.

Minimum 12 in. above roof.

Minimum 12 in. above anticipated snow level.

Maximum 24 in. above roof level without additional

support for vent.

Four (4) ft. from any gable, dormer or other roof

structure with building interior access (i.e., vent, window, etc.).

Ten (10) ft. from any forced air inlet to the building.

Any fresh or make-up air inlet such as a dryer or furnace area is considered to be a forced air inlet.

Maintain a minimum horizontal distance of

12 in. between the vent and combustion air-inlet terminal center lines.

Determine the locations for the vent and combustion air-inlet terminals then make two (2) holes through the roof and interior ceiling(s) to accommodate the vent and combustion air-inlet pipes.

Assemble the vent pipe assembly.

Install the vent system and attach it to the vent connector fitting on the water heater’s blower assembly.

Horizontal lengths of the vent system must slope upwards a minimum of 1/8 in. per foot.

Install the combustion air-inlet system and attach it to the combustion air-inlet rubber coupling on the water heater’s combustion air-inlet tube assembly.

Support vertical and horizontal lengths of the vent and combustion air-inlet systems as previously mentioned.

Determine the vent and combustion air-inlet terminal heights and cut the pipe accordingly. Insert lengths of vent and combustion air-inlet pipes through the ceiling wall as shown.

Install adequate flashing where the vent and combustion air-inlet pipes pass through the roof.

Connect vent elbow onto vertical pipe through roof.

Connect a short piece of pipe approximately 3 in. between the terminals and elbows.

# Min. 12 in.

and Max. 24 in.

Exhaust Vent and Combustion Air-Inlet

Terminals with 1/2 in. mesh Protective Screens and

Termination Restrictors Inside.

Elbow

Above Roof or above Anticipated Snow Level; whichever is highest

Above Roof (Without Additional Support)

Pipe Through Roof

Wind

Vane

Exhaust Vent

Vent Connector

Short Piece of Pipe

.008

-B-

Exhaust Vent

Combustion Air-Inlet

Rubber Coupling

Alternate Vent and Combustion Air-Inlet Pipe Through Roof

-B-

.008

Terminals with 1/2 in. mesh Protective Screens Inside.

# Min. 12 in. Above

Roof or above Anticipated Snow Level; which ever is highest

and

Max. 24 in. Above

Roof (Without Additional Support)

Min 6 in.

Vent Connector

Exhaust Vent

Short Piece of Pipe

Exhaust Vent

Short Piece of Pipe

Slope horizontal pipe upward 1/8 in. per foot min.

Rubber Coupling

Combustion Air-Inlet

Wind Vane

Combustion Air-Inlet

Installing the Water Heater

NOTICE: All pipe, fittings, solvent cement, primers and procedures must conform to American National Standards Institute and American Society for Testing and Materials (ANSI/ASTM) standards.

Cementing Joints

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: For proper installation:

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 low temperature type solvent cement.

Appropriate solvent and cleaner must be used for the

type of vent pipe used (PVC, CPVC or ABS).

All joints in the vent and combustion air inlet piping must be properly sealed and the following materials are recommended:

PVC materials should use ASTM D2564 grade cement.

CPVC materials should use ASTM F493 grade cement.

ABS materials should use ASTM D2235 grade cement.

Cleaner-Primer and Medium Body Solvent Cement:

Cut pipe end square, remove jagged

edges and burrs. Chamfer end of pipe, then clean fitting socket and pipe joint area of all dirt, grease or moisture.

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. Do not allow primer to dry before applying cement.

Apply a thin coat of cement evenly in

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

NOTICE: Cement must be fluid; if not, recoat.

Hold the pipe fitting for 30 seconds to

prevent the tapered socket from pushing the pipe out of the fitting.

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: Stir the solvent cement frequently while using. Use a natural bristle brush or the dauber supplied with the can. The proper brush size is one inch.

NOTICE: This unit is equipped with a

Flammable Vapor Sensor. Do not apply

power until enough time has passed to allow the vapors from the primer and cement to dissipate.

Wiring

120V / 60 Hz LESS THAN 5 AMPS

AX5168

GAS VALVE

INTELLI-VENT ELECTRONIC CONTROL

1 2 3 4 5 6

W BK R Y BL G

WIRE HARNESS THAT RUNS FROM BLOWER ASSEMBLY TO GAS VALVE CONTROL

FLAMMABLE VAPOR SENSOR

H G N

120 VAC PLUG FOR POWERVENT BLOWER ASSEMBLY

POWER VENT BLOWER ASSEMBLY

BLOWER

6 PIN CONNECTOR

CONNECTOR DIAGRAM

SCREW GND

GAS VALVE

INTELLI-VENT ELECTRONIC CONTROL

GND

MOT

120 VAC

SCHEMATIC DIAGRAM

N/C

MOT

BLOWER

NOTE: IF ANY OF THE ORIGINAL WIRE SUPPLIED WITH THE APPLIANCE MUST BE REPLACED, IT MUST BE REPLACED WITH A 18 GA, 600 V, 105º C WIRE.

BK G W

TEMPERATURE SWITCH NC

1 2 3 4 5 6

N/C

R Y

1 2 3

1 2 3 4

1 2 3

GND

IGNITER AND FLAME SENSOR

COMM PORT

1 2

AUX PORT

BK BL G R W Y

= = = = = =

BLACK BLUE GREEN RED WHITE YELLOW

FLAME SENSOR

IGNITER

VAC SW NO

VAC SW NC

VAC SW NO

VAC SW NC

1 2 3 4

COMM PORT

1 2

THERMISTORS

FLAMMABLE VAPOR SENSOR

* NOT AVAILABLE ON ALL MODELS

AUX PORT

THERMISTORS

TS2

TS1

1 2

If local codes permit, the water heater may be connected to electric service with the power cord provided (DO NOT use an extension cord). A grounding receptacle is required.

If local codes do not permit the use of cord connections, a 120 V, 60 Hz power supply, with suitable disconnecting means, must be connected to the black and white leads in the heater control enclosure.

The maximum current draw is

approximately 5.0 amps.

The water heater must be electrically grounded in accordance with local codes, or, in the absence of local codes, in accordance with latest edition of the National Electric Code ANSI/NFPA No.

70. Refer to the figures below for water heater internal wiring.

CAUTION! Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper and dangerous operation. VERIFY PROPER OPERATION AFTER SERVICING!

Installing the water heater

Insulation Blankets

WARNING: If local codes require external application of insulation blanket kits the manufacturer’s instructions included with the kit must be carefully followed.

Insulation blankets, available to the general public, for external use on gas water heaters are not necessary. The purpose of an insulation blanket is to reduce the standby heat loss encountered with storage tank heaters. This water heater meets or exceeds the National Appliance Energy Conservation Act standards with respect to insulation and standby loss requirements making an insulation blanket unnecessary.

The manufacturer’s warranty does not cover any damage or defect caused by installation, attachment or use of any type of energy saving or other unapproved devices (other than those authorized by the manufacturer) into, onto or in conjunction with the water heater. The use of unauthorized energy saving devices may shorten the life of the water heater and may endanger life and property.

The manufacturer disclaims any responsibility for such loss or injury resulting from the use of such unauthorized devices.

CAUTION: If local codes require the application of an external insulation blanket to this water heater, pay careful attention to the following so as not to restrict the proper function and operation of the water heater:

● DO NOT cover the operating or

warning labels attached to the water heater or attempt to relocate them on the exterior of insulation blanket.

● DO NOT apply insulation to the top

of the water heater. This will interfere with the safe operation of the blower assembly.

 DO NOT cover the burner access door,

jacket door, condensate trap, gas control (thermostat) or pressure and temperature relief valve.

 DO NOT apply insulation to the

bottom of the water heater or the area where the Flammable Vapor Sensor is located. This area must be unobstructed so as not to restrict operation of the sensor.

 Inspect the insulation blanket frequently

making certain it has not sagged down onto the Flammable Vapor sensor located around the lower perimeter of the water heater jacket. This could result in an unsafe operating condition.

Hot and Cold Pipe Insulation Installation

Typical vertical piping arrangement

For increased energy efficiency, some water heaters have been supplied with two 24” sections of pipe insulation.

Typical horizontal piping arrangement

Install the insulation, according to the illustrations above, that best meets your requirements.

Temperature & Pressure (T&P) Insulation Installation

For increased energy efficiency, this water heater has been supplied with a 2 3/8” section of T&P insulation. Install the insulation as shown below.

Typical Side Connect T & P

Arrangement.

Slip the insulation cover over the T&P Valve through the center hole and align the hole in the side with the opening of the T&P Valve.

Ensure the T&P Valve opening is not obstructed by the insulation.

Heat Trap

For increased energy efficiency, some water heaters have been supplied with factory installed 3/4” NPT heat traps in the hot outlet line and cold water inlet line.

These heat traps may require a minimum of one (1) 90° 3/4” NPT elbow and may require an additional 90° 3/4” NPT elbow or a 3/4” coupling depending on your installation needs. See Illustration of nipples and heat traps on page 36.

2 screws (mounting tabs)

3 Dual Lock® Strips

Top Cap Installation

Top Cap View

Outside

Inside

Inside Center Front

Read these instructions thoroughly and make sure you understand all the steps and procedures before proceeding with the installation.

Carefully remove the Top Cap from the water heater carton. Install the water heater as

specied per this Use & Care Manual.

NOTICE: Also see information as detailed in “Water Supply Connections” section.

Locate the small plastic bag containing the three (3) Dual Lock® strips and two (2) sheet metal screws to be used to attach the Top Cap in the Use & Care Manual bag. Peel off one side of the Dual Lock® strips and rmly press near the Top Cap mounting tabs and the inside center front of the

rim on the Top Cap, see gure on left.

Peel off the other side of the Dual Lock® strips and place the Top Cap on the top front center of the water heater ensuring that it is aligned correctly and properly positioned on top of the water heater. Press

rmly to ensure proper attachment is made.

Align holes in mounting tabs on the Top Cap with the holes in the top of the heater then secure the Top Cap to the water heater with the two (2) #8 sheet metal screws (supplied).

IMPORTANT: Do not over tighten the screws as this may damage the Top Cap.

Installing the water heater

During Installation of this water heater...........

❑ DO check inlet gas pressure to ensure that it is within the range specified on the rating plate.

❑ DO maintain proper

clearances to combustibles as specified on the rating plate.

❑

allow enough time for joint cement vapors to dissipate BEFORE applying power to the water heater.

❑

ensure that the venting system complies with the guidelines found in the Use and Care Manual and National Fuel Gas Code.

❑

contact a qualified service technician if the main burner will not stay lit. The burner chamber is designed to be sealed utilizing a gasket and tamper resistant screws.

❑

provide proper slope for

condensate drain line.

Burner Access Door Grommet

Flammable Vapor Sensor

Sight Glass

DON’T

❑ DON’T block the Flammable

Vapor Sensor located around the lower portion of the water heater jacket.

❑ DON’T remove the Burner

Access Door unless absolutely necessary. This should only be done by a qualified service technician. A new burner access door gasket must be installed on any burner access door that has been removed.

❑ DON’T install this water

heater where standing water may occur. The base of the water heater is meant to be mounted on a dry surface.

❑ DON’T allow cleaners,

solvents, or other materials to come into contact with the Flammable Vapor Sensor.

❑ DON’T operate the water

heater if the sight glass or burner access door grommet is damaged or broken (see illustration at left).

Installation Checklist

A. Water Heater Location

❑

In a location where the vent and combustion

air-inlet systems will be within the requirements specified in this manual.

❑

Indoors and protected from freezing temperatures.

❑

Proper clearance from combustible surfaces observed and water heater not installed on carpeted floor.

❑

Sufficient fresh air supply for proper operation of water heater.

B. Water Supply

❑

Water heater completely filled with water.

❑

Air purged from water heater and piping.

C. Gas Supply

❑

Gas line equipped with shut-off valve, union and sediment trap.

❑ Approved pipe joint compound used.

❑

Soap and water solution used to check all connections and fittings for possible gas leak.

❑

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, rags, etc., clear of the base of the heater.

❑ Flammable vapor sensor is not blocked.

❑

Water connections tight and free of leaks.

❑

Check inlet gas pressure (with main burner on).

❑

Gas Company inspected installation (if required).

D. Relief Valve

❑

Temperature and Pressure Relief Valve properly installed and discharge line run to open drain.

❑

E. Venting and combustion air-inlet systems

❑

Heater vented separately from all other appliances.

❑

Blower assembly properly installed.

❑ Proper materials and techniques used in the

installation of the vent and combustion airinlet systems.

❑ Vent pipe properly secured to the exhaust

connector of the blower assembly.

❑ Vent and combination air-inlet systems

supported at required intervals.

❑ Appropriate minimum clearances observed.

❑ Precautions taken to prevent moisture damage

❑

F. Wiring

❑

Correct power supply (120 V).

❑

Electrical connections tight.

❑

G. Condensate Line

❑

Sloped toward drain.

❑

Condensate drain line hoses clamped.

❑

Condensate drain protected from freezing (if necessary).

❑

Discharge line protected from freezing.

around vent termination.

Vapors from vent pipe cement and primer have dissipated prior to applying electrical power.

Combustion air-inlet pipe properly secured to the combustion air-inlet rubber coupling.

Horizontal section of

Heater properly grounded and proper polarity observed.

Check for leaks in the condensate trap and line connections.

vent sloped upward.

Supplemental instructions for gas water heaters installed

Vacuum Relief Va lve

If required, install per local codes

in potable water/space heating applications

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

Hot water supply to house

Hot water supply to heating unit

From HOT

outlet on

water heater

Tee fitting for vertical hot water supply lines.

Hot water supply to house

From HOT

outlet on

water heater

Hot water supply to heating unit

Tee fitting for horizontal hot water supply lines.

Combination Potable Water and Space Heating Application

Tee fitting must be installed as shown. This ensures that any air in the water lines will be purged through the domestic water faucets and showers.

DANGER: When this system requires water for space heating at elevated temperatures (above 125°F), 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.

DANGER: 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.

NOTICE: Suitable for (potable) water heating and space heating applications. DO NOT use for space heating application only.

DANGER: 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 non drinking water system. Toxic chemicals such as those used for boiler treatment may be present and will contaminate the drinking water supply causing possible health risks. Never introduce toxic chemicals, such as those used for boiler treatment, into this system.

NOTICE

: 50' - 0" maximum

distance from water heater to fan coil (developed length) is required for Massachusetts State.

Typical Piping Diagram for Combination Potable/Space Heating Installation

Nominal 3/4" size mixing or tempering valve (refer to warning above). Follow mixing or tempering valve manufacturer’s instructions for installation of the valve.

Spring loaded check valve in heating unit hot water supply line and cold water return line (not supplied with water heater)

NOTE: This check valve is incorporated in some heating units. Refer to the installation instructions supplied with specific heating unit to determine if it is required.

Isolation valve in hot water supply line to heating unit (not supplied with water heater)

Temperature and Pressure Relief Valve, tie to location approved by local code

Water Heater to be in accordance with the Local and State Energy Code

All water piping shall be insulated in accordance with Local and State Energy Code.

See diagrams above for proper pipe application for vertical or horizontal supply lines.

Gas line to water heater

Temperature and pressure relief valve discharge line

Gas Control (Thermostat)

Water Heater drain pan installed in accordance with the Local and State Code

Minimum of 2'-0" developed length of 3/4" pipe.

Gas Fired Water Heater

3/4" Tempered

Air vent

domestic hot water supply to house.

3/4" ShutOff Valve (Typ.)

Isolation valve in cold water return line from heating unit (not supplied with water heater)

Gas Direct Vent discharge must comply with Local and State Codes

Heat Trap 6” Min.

3/4" HWS & HWR

to Heating Coil. Drain valve (not supplied with water heater)

6” Air Gap

Pressure Gauge

3/4" Shut-Off Valve (Typ.)

2 Gallon Thermal Expansion Tank (if required-not supplied with water heater)

140°F

120° to 130°F

(Not Supplied)

and valve manufacturer’s

instructions.

3/4" Check Valve with 1/8" Hole

3/4" cold water supply

3/4" Shut-Off Valve (Typ.)

Air Handler

Electronically controlled pump timer. Activates every 6 hours for 60 seconds. Wire to bronze pump.

Hot water to space heater

Hot water coil

All bronze pump.

Check valve internal in pump.

Air bleed valve.

Water Sample Tap.

To HVAC Unit.

FAN

ON OFF HEAT COOL

Lighting the water heater

Before operating this water heater, be sure to read and follow the instructions on the label pictured below and all other labels on the water heater, as well as the warnings printed in this manual. Failure to do so can result in unsafe operation of the water heater resulting in property damage, personal injury, or death. Should you have any problems reading or following the instructions in this manual, STOP, and get help from a qualified person.

FOR YOUR SAFETY READ BEFORE OPERATING

WARNING:

Manual instructions exactly, a re or explosion may result causing property

If you do not follow these instructions and the Use & Care

damage, personal injury or loss of life.

This appliance does not have a pilot. It is

equipped with an ignition device which automatically lights the burner. Do N

the burner by hand.

BEFORE PUTTING THIS APPLIANCE INTO

SERVICE - Smell all around the appliance area for gas. Be sure to smell next to the oor because some gas is heavier than air and will settle on the oor.

OT try to light

WHAT TO DO IF YOU SMELL GAS

Do not try to light any appliance. Do not touch any electric switch; do not use any phone in your building. Immediately call your gas supplier from a neighbor’s phone. Follow the

OPERATING INSTRUCTIONS

Stop! Read the safety information above

on this label.

Toggle the “ON/OFF” switch located on t he

gas control to the “O N” position.

Set the thermostat to the lowes t setting

by pressing the COOLER and HOTTER buttons at the same time and holdin g



them for (1) second. Depress the COOLER



button until only the VAC indicator light is lit.

Toggle the “ON/OFF” switch locat ed on the gas control to t he “OFF” position.

Turn o all electrical po wer to the appliance. This appliance is equipped with a Hot

Surface Ignition System which auto matically lights the burner. Do NOT open the inner door of this applian ce and try to light the burner by hand!

Wait ve (5) minutes to clear out an y gas.

If you smell gas , STOP! Follow “B” in the safety informatio n above on this label. If you do not sme ll gas, go ahead to the next step.



gas supplier’s instructions.

If you cannot reach your gas supplier, call the re department.

Use only your hand to push in the gas

control buttons. Never use tools. If the control buttons will not push in, don’t try to repair them, call a qualied service technician. Force or attempted repair may result in re or explosion.

Do not use this appliance if any part has

been under water. Immediately call a qualied installer or service agency to replace a ooded water heater. Do not attempt to repair the unit! It must be replaced!

Turn on all electrical power to the appliance.

Togg le the “ON/OFF” switch located on the

gas control to the “O N” position.

Set the rmostat to the desired temperature

10.

setting by p ressing the COOLER and HOTTER buttons at the sam e time and holding the m for (1) second. Depress the HOTTER button until the desir ed temperature di splay setting is lit. The prefe rred starting point for temperature setting is ind icated by on the thermostat.

If the appliance will no t operate, follow

11.

the instructions “T O TURN OFF GAS TO APPLIANCE” and call your ser vice technician or gas supplier.

COOLER/HOTTER

BUTTONS

 

VAC A B C

COOLER HOTTER



SCALDING RISK INCREASES

WITH HOTTER WATER

ON/OFF



SWITCH



TO TURN GAS OFF TO THE APPLIANCE

Set the thermostat to the lowest setting by rst depressing the COOLER and HOTTER buttons at the same time and holding for (1) second. Depress the COOLER button



until only the VAC indicator light is lit.

Toggle the “ON/OFF” switch located on the gas control to the “OFF” position.

Turn o all electrical power to the appliance.



Operating the water heater

CAUTION: Hydrogen gas can be produced in a hot water system served by this water heater that has not been used for a long period of time (generally two weeks or more). HYDROGEN GAS IS EXTREMELY FLAMMABLE!! To dissipate such gas and to reduce risk of injury, it is recommended that the hot water faucet be opened for several minutes at the kitchen sink before using any electrical appliance connected to the hot water system. If hydrogen is present, there will be an unusual sound such as air escaping through the pipe as the water begins to flow. Do not smoke or use an open flame near the faucet at the time it is open.

Safety Precautions

Do turn off manual gas shut-off valve

if water heater has been subjected to over heating, fire, flood, physical damage or if the gas supply fails to shut off.

Do Not turn on water heater unless it

is completely filled with water.

Do Not turn on water heater if cold

water supply shut-off valve is closed.

Do Not allow combustible materials

such as newspaper, rags or mops to accumulate near water heater.

Do Not store or use gasoline or other

flammable vapors and liquids, such as adhesives or paint thinner, in vicinity of this or any other appliance. If such

flammables must be used, open doors and windows for ventilation, and all gas burning appliances in the vicinity should be shut off including their pilot burners, to avoid vapors lighting.

NOTICE: Flammable vapors can be drawn by air currents from surrounding areas to the water heater.

If there is any difficulty in

understanding or following the Operating Instructions or the Care and Cleaning section, it is recommended that a qualified person or serviceman perform the work.

DANGER: Hotter water increases the potential for Hot Water SCALDS. Households with small children, disabled, or elderly persons may require a 120°F or lower gas control (thermostat) setting to prevent contact with HOT water.

Operating Procedure

This heater is equipped with a hot surface ignitor to light the main burner. There is no pilot light to be lit, but on initial startup, it is recommended that the outer door be removed (leave inner door in place for safety) to determine if the hot surface ignitor and main burner are operating properly.

Once filled with water, it is only necessary to plug the power cord in and make sure the “ON/OFF” switch located on the gas control (thermostat) is in the “ON” position to put the water heater into operation. Within seconds the hot surface ignitor should heat

Water Temperature Setting

The temperature of the water in the water heater can be regulated by pressing the buttons on the front of the gas control (thermostat).

Safety and energy conservation are factors to be considered when selecting the water temperature setting of the water heater’s gas control (thermostat(s)). The lower the temperature setting, the greater the savings in energy and operating costs.

To comply with safety regulations, the gas control (thermostat) was set at its lowest setting before the water heater was shipped from the factory. The recommended starting point temperature is 120°F.

up, then the gas control (thermostat) should open and the main burner ignite. After the main burner ignites, replace the outer door. If no main burner flame is established, the gas control (thermostat) will go through three trials for ignition before going into a lockout. A warning light will alert the user of this lock-out condition. If this happens, refer to “Troubleshooting Guide.”

TO SHUT OFF WATER HEATER – Turn switch on the gas control (thermostat) to the “OFF” position.

Water temperatures above 125°F can cause severe burns or death from scalding. Be sure to read and follow the warnings outlined in this manual and on the label located on the water heater near the gas control (thermostat).

Mixing valves are available for reducing point of use water temperature by mixing hot and cold water in branch water lines. Contact a licensed plumber or the local plumbing authority for further information. (See page 4 for more details.)

The chart on the next page may be used as a guide in determining the proper water temperature for your home.

VAC

A B C

HOTTERCOOLER

SCALDING RISK INCREASES WITH HOTTER WATER

Water Temperature Setting

Maximum water temperatures occur just after the burner has shut off. To determine the water temperature, turn on a hot water faucet and place a thermometer in the water stream.

To avoid any unintentional changes in water temperature settings, the gas control (thermostat) has a tamper resistant feature for changing the temperature setting. To change the temperature setting follow these instructions.

1. "Wake Up" the temperature indicators by holding down both "COOLER" and "HOTTER" temperature adjustment buttons at the same time for one second, see Figure below. One or two of the temperature indicators will light up. These indicators will only remain on for 30 seconds if no further buttons are pressed. After 30 seconds the control will go back to "Sleep" mode.

2. Release both of the temperature buttons.

a. To decrease the temperature press and release the "COOLER" button until the desired setting is reached.

b. To set temperature up to 140°F press and release the “HOTTER” button until the desired temperature is reached.

A B C

VAC

SCALDING RISK INCREASES WITH HOTTER WATER

ON/OFF Switch

HOTTERCOOLER

COOLER Button

DANGER: Hotter water increases the potential

for Hot Water SCALDS.

c. To set temperature above 140°F follow these instructions:

i. Press and hold the “HOTTER” button for a few seconds, until all temperature indicator lights come on for one second and then turn off.

ii. Now press and release the “HOTTER” button until the desired temperature is reached. The maximum temperature setting is 160°F.

iii. To decrease the temperature press and

Time/Temperature Relationship in Scalds

Water Temperature Time To Produce a Serious Burn

120°F More than 5 minutes

125°F 11/2 to 2 minutes

130°F About 30 seconds

135°F About 10 seconds

140°F Less than 5 seconds

145°F Less than 3 seconds

150°F About 11/2 seconds

155°F About 1 second

Table courtesy of Shriners Burn Institute

HOTTER Button

release the “COOLER” button until the desired temperature is reached.

NOTICE: Holding down the button will not continue to lower or raise the temperature setting. The button must be pressed and released for each temperature change desired.

A condition known as “stacking” or “layering” can occur when a series of short and frequent hot water draws are taken.

The hottest temperature water will be at the top of the tank, closest to the outlet pipe delivering hot water to the home.

Stacking can cause this top layer of water to be hotter than the water toward the bottom of the tank near the gas control (thermostat). Therefore, always remember to test the water temperature with your hand before use and remember that hotter water increases the risk of scald injury.

Always supervise young children or others who are incapacitated.

The gas control (thermostat) is constructed with a built in safety shut-off device designed to shut off the gas supply to the burner if the main burner is extinguished for any reason.

The gas control (thermostat) is also equipped with a gas shut off device that will shut off the gas supply to the burner if the water heater exceeds normal operating temperatures. Refer to the "Before You Call For Service" section of this manual, or contact your dealer.

WARNING: Should overheating occur or the

gas supply fail to shut off, turn off the manual gas (shut-off) valve to the appliance.

If the water heater has been subjected to fire, flood or physical damage, turn off the manual gas (shut-off) valve, and do not operate the water heater again until is has been checked by a qualified service technician.

NOTICE: Do not use this appliance if any part has been under water. Immediately call a qualified installer or service agency to replace a flooded water heater. Do Not attempt to repair the unit! It must be replaced.

Temperature Setting

VAC = approx. 70°F

• = approx. 110°F

• and ▲ = approx. 115°F

Both

▲= approx. 120°F

Both ▲and A= approx. 125°F

A = approx. 130°F

Both A and B = approx. 135°F

B = approx. 140°F

Both B and C = approx. 145°F

C = approx. 150°F

C-Flashing = approx. 160°F

Display

VA C ▲ A B C

Burns on Adult Skin

--------------------

More than 5 minutes

1-1/2 to 2 minutes

About 30 seconds

About 10 seconds

Less than 5 seconds

Less than 3 seconds

About 1-1/2 seconds

About 1/2 seconds

Operating the water heater

Sequence of Operation

During initial start-up or a call for heat, the control will verify the pressure switch is open.

Once the control verifies the blower pressure switch is open, the control will energize the blower motor for the prepurge sequence.

The control will verify the blower pressure switch has closed, ensuring that the blower is functioning properly and that the condensate, combustion air inlet and venting systems are not blocked.

The control will then proceed through a sequence of self-diagnostics before initiating a trial for ignition.

During the trial for ignition, the hot surface ignitor will warm up.

Once the hot surface ignitor warms up, the main gas control (thermostat) will open allowing gas to flow to the main burner.

Once the main burner ignites, the control will verify that the burner flame is present through the flame sense circuit. The hot surface ignitor will then turn off.

The main burner will remain lit throughout the heat cycle until the water temperature setting is reached.

Once the water temperature setting is reached, the control will close the main gas control (thermostat) which will extinguish the main burner flames.

The blower motor will stay energized for an additional few seconds after the control verifies that the burner flame is extinguished in order to clear combustion gases from the water heater.

After the post-purge sequence, the control will de-energize the blower motor and go into a stand-by mode awaiting the next call for heat.

This water heater is equipped with a flammable vapor sensor that is monitored continuously by the electronic control in all modes of operation.

In the event that flammable vapors are detected, the control will automatically shut down the water heater and prevent the water heater from being started again.

The following is a list of materials that

will cause the Flammable Vapor Sensor

to shut down the water heater.

 Vapors of Gasoline

 Vapors of certain flammable paints,

stains, and thinners

 Vapors of vent pipe Cement &

Solvents

 Bleach (direct contact with

flammable vapor sensor)

 Some other flammable materials and

their vapors

If the flammable vapor sensor shuts down the water heater, then the electronic control will display the appropriate error code and you should then promptly contact a qualified service technician.

Refer to the “NOTICE” on page 3 for additional information.

Care and cleaning of the water heater

Draining the Water Heater

DANGER: 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.

DANGER: Hotter water increases the potential for Hot Water Scalds.

DANGER: Failure to perform the recommended Routine Preventative 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.

CAUTION: Shut off gas to the water heater gas control (thermostat) at the manual shut-off valve before draining water.

DANGER: Before manually operating the temperature and pressure relief valve, make certain no one will be exposed to the hot water released by the valve. The water drained from the tank may be hot enough to present a scald hazard and should be directed to a suitable drain to prevent injury or damage.

Before turning off the cold water supply to the water heater, open a hot water faucet allowing sufficient cold water into the tank to prevent the risk of a scald injury while draining the water heater. Once the water in the tank is no longer hot, turn off the cold water supply to the water heater. Open a hot water faucet or lift the handle on the relief valve to admit air to the tank.

Attach a garden hose to the drain valve on the water heater and direct the stream of water to a drain. Open the drain valve.

Routine Preventative Maintenance

Properly maintained, your water heater will provide years of dependable troublefree service.

It is recommended that a periodic inspection of the gas control (thermostat), burner, relief valve, internal flue-way and venting system should be made by service personnel qualified in gas appliance repair.

It is suggested that a routine preventative maintenance program be established and followed by the user.

Inspect the combustion air-inlet pipe and vent pipes. Make certain that all joints are secure and that vent pipe supports are all in place. Check the outdoor vent and air inlet pipes to see that it is free of obstructions, and that there is no damage nearby caused by condensate.

At least once a year, lift and release the lever handle on the temperature pressure relief valve, located near the top of the water heater, to make certain the valve operates freely. Allow several gallons to flush through the discharge line to an open drain.

NOTICE: If the temperature and pressure relief valve on the water heater discharges periodically, this may be due to thermal expansion in a closed water system. Contact the water supplier or your plumbing contractor on how to correct this. DO NOT plug the relief valve outlet.

A water heater’s tank can act as a settling basin for solids suspended in the water. It is therefore not uncommon for hard

water deposits to accumulate in the bottom of the tank. If allowed to accumulate, these solids can cover the gas control (thermostat) sensors, causing the sensors to operate erratically. Because accumulated solids can prevent the gas control (thermostat) sensors from accurately reading the water temperature, the water at the fixture can be hotter than the gas control (thermostat) setting. It is suggested that a few quarts of water be drained from the water heater’s tank every month to clean the tank of these deposits.

Rapid closing of faucets or solenoid valves in automatic water using appliances can cause a banging noise heard in a water pipe. Strategically located risers in the water pipe system or water hammer arresting devices can be used to minimize the problem.

The anode rod should be removed from the water heater’s tank annually for inspection and replaced when more than 6” of core wire is exposed at either end of the rod.

Make sure the cold water supply is turned off before removing anode rod.

This water heater incorporates a combustion shut off devices that shuts the operation of the water heater down if undesirable combustion conditions occur, such as the presence of flammable vapors or blockage of the condensate, combustion air inlet and venting systems. Contact a Qualified Service Technician if this occurs.

Care and cleaning of the water heater

DANGER: Combustible materials, such as clothing, cleaning materials, or flammable liquids, etc., must not be placed against or next to the water heater.

Proper burner flame pattern

Housekeeping

To ensure sufficient ventilation and combustion air supply, proper clearances must be maintained.

DO NOT obstruct or block the Flammable Vapor Sensor. The sensor

does not require any maintenance or cleaning. DO NOT get Flammable Vapor Sensor wet. DO NOT expose to cleaning agents.

Burner Inspection

Visually inspect the hot surface ignitor and burner annually.

Through the sight glass, inspect the hot surface ignitor with the main burner off and inspect the main burner while firing.

If any unusual burner operation is noted, the water heater should be shut off until qualified service assistance can be obtained.

CAUTION: For your safety, cleaning of the burner must be performed only by qualified service personnel, as it involves the disconnection of gas piping and leak testing. The burner chamber is a sealed area. If the burner access door is removed, the burner access door gasket must be replaced.

For cleaning, remove the burner from the water heater. A vacuum cleaner can be used on the burner and floor shield inside the water heater. The burner can also be cleaned by scrubbing with mild detergent.

Combustion Air-Inlet and Vent System Inspection

Inspect the combustion air-inlet and vent systems. Make certain that all joints are secure and that combustion air-inlet and vent system supports are all in place.

Check the outdoor combustion air-inlet

and vent system terminals to see that they are free of obstructions, and that there is no damage nearby caused by condensate.

NOTICE: Refer to the Hydrogen Gas Caution in the Operating Instructions.

NOTICE: Do not remove the anode rod from the water heater’s tank, except for inspection and/or replacement, as operation with the anode rod removed will greatly shorten the life of the glass lined tank and will exclude warranty coverage.

Vacation and Extended Shut-Down

If the water heater is to remain idle for an extended period of time, the power and water to the appliance should be turned off to conserve energy and prevent a build-up of dangerous hydrogen gas.

The water heater and piping should be drained if they might be subjected to freezing temperatures.

After a long shut-down period, the

water heater’s operation and controls should be checked by qualified service personnel. Make certain the water heater is completely filled again before placing it in operation.

Anode Rod

This water heater is equipped with an anode rod designed to prolong the life of the glass lined tank. The anode rod is slowly consumed, thereby eliminating or minimizing corrosion of the glass lined tank.

Water sometimes contains a high sulfate

and/or mineral content and together with cathodic protection process can produce a hydrogen sulfide, or rotten egg odor in the heated water. Chlorination of the water supply should minimize the problem.

Before You Call For Service

Troubleshooting Tips

Save time and money! Review the charts on the following pages first and you may not need to call for service.

This water heater incorporates a combustion shut off devices that shuts the operation of the water heater down if undesirable combustion conditions occur, such as the presence of flammable vapors or blockage of the vent and/or combustion air-inlet systems. Contact a Qualified Service Technician if this occurs.

Problem Possible Causes What To Do

Condensation This usually happens when  This is normal. After the water in the tank warms a new water heater is up, the condensation will disappear. If, however, the filled for the first time. condition persists, examine the piping and fittings for possible leaks.

Moisture from the products  This is normal and will disappear in time. Excessive of combustion condensing condensation can cause main burner outage. on the tank surface.

An undersized water  Use a water heater size that meets the requirements heater will cause of your needs. condensation.

Yellow flame Scale on top of the burner.  Contact a qualified service technician to remove scale. or soot

Vent and/or combustion air-  Remove obstruction or debris from vent and/or

inlet pipes are blocked. combustion air-inlet pipes.

Unable to light Air in gas line.  Contact a qualified service technician to purge the air the main burner from the gas line.

Blocked vent and/or combustion Contact a qualified service technician to evaluate vent air-inlet pipes. and/or combustion air-inlet pipes for blockage.

Pressure Switches  Make sure the pressure switch hose is not "kinked".

Wire Connection not fully  Contact a qualified service technician to confirm wire secured. connections.

Combustion Shut-off Devices  Combustion shut-off devices should be inspected by a tripped. qualified service technician.

Gas Control Problem  Contact a qualified service technician.

Main burner does not Gas Control's (Thermostat’s)  Contact a qualified service technician. stay lit gas shut-off device has opened.

CAUTION: Make certain power to water heater is "OFF" by unplugging blower power cord from power

outlet before removing protective cover FOR ANY REASON.

CAUTION: Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper

and dangerous operation. VERIFY PROPER OPERATION AFTER SERVICING.

CAUTION: For your safety DO NOT attempt repair of gas piping, gas control (thermostat), burners, vent

and/or combustion air-inlet systems or other safety devices. Refer repairs to qualified service personnel.

Before You Call For Service

Troubleshooting Tips

Save time and money! Review the charts on the following pages first and you may not need to call for service.

This water heater incorporates a combustion shut off devices that shuts the operation of the water heater down if undesirable combustion conditions occur, such as the presence of flammable vapors or blockage of the vent and/or combustion air-inlet systems. Contact a Qualified Service Technician if this occurs.

Problem Possible Causes What To Do

Rumbling noise Scale and sediment  Drain the water heater to remove scale and sediment from the tank. Refer to the top of page 31.

Relief valve Pressure build up  This is an unacceptable condition and must be producing popping caused by thermal corrected. Contact the water supplier or plumbing noise or draining expansion to a contractor on how to correct this. Do not plug the closed system. relief valve outlet.

Not enough or Water usage may have  Wait for the water heater to recover after an no hot water exceeded the capacity abnormal demand. of the water heater.

Low gas pressure.  Check gas supply pressure and manifold pressure.

The gas control (thermostat)  See the “Water Temperature Setting” of The Water may be set too low. Heater section of this manual.

Leaking or open hot  Make sure all faucets are closed. water faucets.

Check valve error codes.  Refer to gas valve error code table on page 35.

“ON/OFF” switch turned off.  Turn switch to “ON” position.

Blower unplugged.  Plug in. Verify power supply (120VAC).

Combustion Shut-off Devices  Contact a qualified service technician. tripped.

Water is too hot The gas control (thermostat) ● See the “Water Temperature Setting” of The Water is set too high. Heater section of this manual.

Gas Control (Thermostat) ● Contact a qualified service technician to replace the Defective. gas control (thermostat).

CAUTION: Make certain power to water heater is "OFF" by unplugging blower power cord from power outlet before removing protective cover FOR ANY REASON.

CAUTION: Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper

and dangerous operation. VERIFY PROPER OPERATION AFTER SERVICING.

CAUTION: For your safety DO NOT attempt repair of gas piping, gas control (thermostat), burners, vent and/or combustion air-inlet systems or other safety devices. Refer repairs to qualified service personnel.

Gas Control LED Error Codes

LED Status Problem Solution

● ○ ○ ● ○ ○

VAC ▲ A B C

● ○ ● ○ ● ○

VAC ▲ A B C

○● ○ ● ○ ○ ○

VAC ▲ A B C

● ○ ● ○ ○ ●

VAC ▲ A B C

● ○ ● ○ ● ●

VAC ▲ A B C

● ○ ○ ● ● ○

VAC ▲ A B C

○● ○ ○ ○ ● ●

VA C ○ ▲ A B C

● ● ● ● ● ●

VAC ▲ A B C

● ○ ○ ○ ● ○

VAC ▲ A B C

● ○ ○ ● ● ●

VAC ▲ A B C

○● ○ ● ● ○ ○

VAC ▲ A B C

● ○ ● ● ○ ●

VAC ▲ A B C

○● ○ ○ ● ○ ●

VA C ○ ▲ A B C

○● ○ ○ ○ ○ ●

VAC ▲ A B C

● ● ○ ○ ● ○

VAC ▲ A B C

An open earth ground circuit to the ignition system.

Wiring error or a high resistance to earth ground.

Pressure switch remained closed longer than 5 seconds after the call for heat began. Pressure or temperature switch remained open longer than 5 seconds after the combustion blower was energized.

Error in the hot surface ignitor circuit. 1. Check that all wiring is correct and secure.

System in lockout. 1. Gas supply is off or too low to operate.

Problem in the gas valve driver circuit. 1. Turn power to the water heater off for 10 seconds and

Problem with the internal circuit. 1. Turn power to the water heater off for 10 seconds and

Flame signal sensed out of proper sequence.

ECO activated. 1. Turn power to the water heater off for 10 seconds and

One of the temperature adjust buttons stuck closed.

Water temperature sensor error, open

or shorted.

Flammable sensor problem. 1. Check for correct wiring to FV sensor.

Flammable vapors near water heater. Control in lockout.

Weak flame current. 1. Check that the ame sensor rod is making good contact

1. Check that the earth ground connection is properly connected.

2. Check that the ground conductor on the water heater is properly connected.

1. Check proper connection of line neutral and hot wires.

2. Check that the water heater is securely connected to earth ground.

1. Pressure switch wiring is incorrect.

2. Replace pressure switch.

1. Pressure or temperature switch(es) wiring is incorrect.

2. Pressure switches tubing is not connected correctly.

3. Air inlet, exhaust or condensate lines obstructed.

4. Check vent and air inlet pipe size used is per this installation instructions.

5. Check maximum number of elbows or maximum equivalent feet of vent and air inlet pipe does not exceed recommended length in these installation instructions.

6. Replace faulty switch(es) on blower assembly.

2. Replace hot surface ignitor.

2. Hot surface ignitor not positioned correctly.

3. Low voltage to the water heater.

4. Electric polarity to unit is incorrect - test and correct.

5. Replace gas control (thermostat).

6. Check that the ame sensor rod is making good contact with burner ame.

then back on.