Rheem Direct Vent Gas Tankless Water Heater Use And Care Manual

Page 1

AP14044 (06/06)

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.

● Immediately call your gas supplier

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

● If you cannot reach your gas supplier, call

the fire department.

● Do not return to your home until authorized

by the gas supplier or fire department.

— 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.

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

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, to 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 don’t understand these instructions or any terms within it, seek professional advice.

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

Use & Care Manual

With Installation Instructions for the Installer

Printed in Japan

Tankless Water Heater

Warning: This water heater is not suitable

for use in manufactured (mobile) homes!

Direct Vent Gas

31-80813-00

CERTIFIED

Page 2

Safety Information

Safety Precautions . . . . . . . 3–6

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

Installation Instructions

Location, Outdoor. . . . . . . . . . 7

Location, Indoor . . . . . . . . . 8, 9

Venting . . . . . . . . . . . . . . 10-15

Water Connections. . . . . 16-18

Gas Supply. . . . . . . . . . . . . . 19

High Altitude . . . . . . . . . . . . 19

Remote Control . . . . . . . 20, 21

Electrical Connection . . . . . . 22

Typical Installation . . . . . . . . 23

Pipe Insulation . . . . . . . . . . . 24

Installation Checklist . . . . . . 25

Operating Instructions

Lighting Instructions . . . . . . 26

Water Temperature. . . . . 27, 28

Care and Cleaning

Maintenance. . . . . . . . . . . . . 29

Housekeeping . . . . . . . . 29, 30

Vent Inspection . . . . . . . . . . . 30

Burner Inspection . . . . . . . . 30

Extended Shut-Down . . . . . . 30

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

Freeze Protection . . . . . . . . . 31

Troubleshooting Tips

Before You Call

For Service. . . . . . . . . . . 32, 33

Customer Service

Parts List. . . . . . . . . . . . . . . . 34

If You Need Service. . . . . . . 36

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.

READ THIS MANUAL

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.

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.

READ THE SAFETY INFORMATION

Qualified Installers Only!

Dip Switch Adjustment . . . 35

Page 3

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.

IMPORTANT SAFETY INFORMATION. READ ALL INSTRUCTIONS BEFORE USING.

Failure to install and properly vent the water heater to the outdoors as outlined in the Venting Section of the Installation Instructions in this manual 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 it is properly vented and has an adequate air supply for proper operation.

Be sure to inspect the vent terminal, the air intake, and the coaxial vent system on the water heater for proper installation at initial start-up; and at least annually thereafter. Refer to the Care and Cleaning section of this manual for more information regarding coaxial vent system inspection.

DANGER!

INSTALLAND PROPERLY VENTTHE WATER HEATER…

Gasoline, as well as other flammable materials and liquids (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 the 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.

WARNING!

DANGER

FLAMMABLES

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

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

Keep flammable products:

1. far away from heater,

2. in approved containers,

3. tightly closed and

4. out of children's reach.

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

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

Flammable Vapors

Water he ater has a ma in burner flame. The main burner flame:

1. which c an come on at any time and

2. will ignite flammable vapo rs.

Vapo rs:

1. cannot be seen,

2. are heavier than air,

3. go a long way on the floo r and

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

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

Page 4

Time/Temperature Relationship in Scalds

Water Temperature Time To Produce a Serious Burn

120°F (49°C) More than 5 minutes 125°F (52°C) 11/2 to 2 minutes 130°F (54°C) About 30 seconds 135°F (57°C) About 10 seconds 140°F (60°C) Less than 5 seconds 145°F (63°C) Less than 3 seconds 150°F (66°C) About 11/2

seconds

155°F (68°C) 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 (49°C) or lower temperature setting to prevent contact with “HOT” water.

Maximum water temperature occurs while burner is on. 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 27 & 28 for more details.)

The temperature of the water at the outlet of the water heater can be regulated by setting the temperature on Remote Control. The remote control was set at 100°F (38°C) before it was shipped from the factory.

The diagram to the bottom left illustrates the Remote Control and how to adjust the water temperature.

Notice: The factory setting allows operating temperatures between 100°F (38°C) and 120°F (49°C). Temperatures of up to 140°F (60°C) can be achieved with the MAIN (UMC-117) remote control and a dip switch adjustment. Only qualified service personnel should perform this adjustment. Only factory authorized remote control(s) should be used.

Notice: When this water heater is supplying general purpose hot water requirements for use by individuals, a thermostatically controlled mixing valve for reducing point of use water temperature is recommended to reduce the risk of scald injury. Contact a licensed plumber or the local plumbing authority for further information.

DANGER!

WATER TEMPERATURE SETTING

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

IMPORTANT SAFETY INFORMATION READ ALL INSTRUCTIONS BEFORE USING.

DANGER

HOT

BURN

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

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

See instruction manual before setting temperature at water heater.

Feel water before bathing or showering.

Temperature limiting valves are available, see manual.

PRIORITY

°F

POWER

ON/OFF

Page 5

Both 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.

DANGER!

NATURAL GAS AND LIQUEFIED PETROLEUM MODELS

● 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; propane for propane units and 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.

● Propane or 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

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

● It is recommended that more than one

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

Notice: 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 building 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 building until the

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

Page 6

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.

SAFETY PRECAUTIONS

IMPORTANT SAFETY INFORMATION READ ALL INSTRUCTIONS BEFORE USING.

WARNING!

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

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

READ AND FOLLOW THIS SAFETY INFORMATION CAREFULLY.

SAVE THESE INSTRUCTIONS

Page 7

WARNING: Follow vent manufacturer’s instruction while installing vent. If required, provide additional clearances from vent to combustibles per vent manufacturer’s instruction.

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 North Capitol Street Northwest, Washington, DC 20001 as ANSI standard Z223.1 or National Fire Protection Association, 1 Batterymarch Park, Quincy, MA 02269 as NFPA 54. In Canada, the latest edition of the CSA B149.1 Natural Gas and Propane Installation, and the Canadian Electrical Code, CSA C22.1 Part 1, in the absence of local codes.

Location of Water Heater

The water heater should not be located in an area where leakage of the heat exchanger or connections will result in damage to the area adjacent to it or to lower floors of the 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 pan must not restrict combustion air flow.

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.

Because of natural air movement in a room or other enclosed space, flammable vapors can be carried some distance from where their liquids are being used or stored. The open flame of the water heater’s main burner can ignite these vapors causing an explosion or fire which may result in severe burns, death or property damage.

The water heater must be located so it is not subject to physical damage, for example, by moving vehicles, area flooding, etc.

If the water heater is installed in a garage, it should be installed so that the direct ignition system and main burner are no less than 18 inches (45 cm) above the garage floor.

Raising the gas fired water heater will reduce BUT NOT eliminate the possibility of lighting the vapor of any flammable liquids which may be improperly stored or accidentally spilled.

● The water heater should be installed as

close as practical to the vent termination to minimize vent length and the number of elbows required for venting.

● The water heater should be installed with

the proper venting materials and termination suitable for Category III venting.

● A fire stop plate should be installed at every

penetration of a floor or ceiling if the vent is not running in a fire rated shaft.

● Failure to install and properly vent the water

heater to the outdoors as outlined in the Venting Section of this manual can result in unsafe operation.

● Long hot water lines should be insulated to

conserve water and energy.

● The water heater and water lines should

be protected from exposure to freezing temperatures.

● Do not install the water heater in

bathrooms, bedrooms, any occupied rooms normally kept closed, or in outdoor areas.

● Do not install the water heater in small,

poorly ventilated rooms, or in airtight rooms with air conditioning.

● Do not install water heater where subject

to vibrations.

● Do not install the water heater in

Recreational Vehicles, Mobile Homes, Boats and other Watercrafts.

● Do not install the water heater near vents

for heating or cooling. A minimum of 4 feet (1.2 m) should be maintained.

● Minimum clearance from combustible and

non-combustible construction is 1/2” (1.3 cm) sides, 0” rear (with support bracket); 12” (30 cm) from the bottom; 12” (30 cm) from the front of the water heater; and 12” (30 cm) from the top (24” [61 cm] from front and top is recommended for servicing purposes).

● Maintain a minimum clearance of

1” (2.5 cm) around the coaxial vent pipe to combustible or non-combustible construction, unless otherwise specified by vent manufacturer or installed in an enclosed space. If the clearances stated on the Instruction/Warning Label, located on the front panel of the heater differ, install the water heater according to the clearances stated on the label.

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.

Minimum Clearance from

Combustible and

Non-Combustible

Construction.

Top = 12" (30 cm) Bottom = 12" Front = 12" (30 cm) Back = 0"* Side = 1/2" CoAxial Vent = 1"

* (with support bracket)

(30 cm)

min. 1/2 "

(1.3 cm)

min. 1/2 "

(1.3 cm)

min. 1"

min. 12" (24" (61 cm) minimum is recommended for service)

(2.5 cm)(2.5 cm)

min. 1"

1” (2.5 cm)

1” (2.5 cm) min

min

1” (2.5 cm)

min

Coaxial Vent Pipe & Air Intake

Page 8

PRIORITY

°F

POWER

ON/OFF

Remote Control

Assembly Kit

Wood Screw x 5pcs.

Washer x 4 pcs.

AICR

MOC

SELK

NAT

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RETAEH RETAW

3 A HTI

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RAEY

GNAH

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( 1-

50/30

431PA

Use & Care Manual

With Installation Instructions for the Installer

Residential Gas

Tankless

Water Heaters

Warning: This waterheateris not suitable for

use in manufactured (mobile) homes!

The purpose of this manual is twofold: one, to provide the installerwith the basic directions and recommendations forthe properinstallation and adjustment of the waterheater; and two, to the owner–operator, to explain the features, operation, safety precautions, maintenance and troubleshooting of the waterheater. This manual also includes a parts list.

It is imperative that all persons who are expected to install, operate or adjust this waterheaterread the instructions carefully so they may understand how to perform these operations. If you don’t understand these instructions orany terms within it, seek professional advice.

Any questions regarding the operation, maintenance, service or warranty of this waterheatershould be directed to the sellerfrom whom it was purchased. If additional information is required, referto the section on How to Obtain Service Assistance.

Do not destroy this manual. Please read carefully and keep in a safe place forfuture 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 orotherreproductive harm.

WARNING: If the information in these instructions is not followed exactly,

a fire orexplosion may result causing property damage, personal injury ordeath.

FOR YOUR SAFETY!

● If you cannot reach yourgas supplier, call

—Do not store or use gasoline or other

the fire department. flammable vapors or liquids or other combustible materials in the vicinity of this or

● Do not return to yourhome until authorized

any otherappliance. To do so may result in an

by the gas supplierorfire department. explosion orfire.

— Improperinstallation, adjustment,

alteration, service ormaintenance can cause

—WHATTO DO IFYOU SMELL GAS

property damage, personal injury, ordeath .

●Do not try to light any appliance.

Referto this manual. Installation and service

● Do not touch any electrical switch; do not

must be performed by a qualified installer,

use any phone in yourbuilding.

service agency orthe gas supplier.

● Immediately call yourgas supplierfrom a

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

Printed in USA

Tankless Unit

Use & Care Manual

Manual Appliance

Gas Shut-off Valve

Page 9

The water heater must be installed with a 3” or 5” diameter UL approved Category III Coaxial Stainless Steel appliance coaxial vent pipe and an appropriate adapter.

Venting

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

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

All coaxial vent components (adapters, pipe, elbows, terminals, etc.) should be UL 1738 Certified Stainless Steel Venting Material (e.g. AL29-4C).

The specified vent termination must be used. The termination should be a 90° elbow with screen. (Refer to pages 13 and 14 for an example of 90° termination)

Use the screws provided to connect the coaxial vent pipe with the anti-disconnection joint.

Follow coaxial vent manufacturer’s installation instructions and their recommended clearances to combustibles.

The unit can be vented either horizontally or vertically.

Coaxial vent pipe runs must be adequately supported along both horizontal and vertical runs.

The maximum recommended unsupported

span should be no more than five (5) feet (1.5 m). Support isolation hanging bands should be used. DO NOT use wire. (See diagram below).

Notes on pr

e-existing vent:

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

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

WARNING: Use 3” or 5” UL approved Category III Stainless Steel vent material only. No other vent material is permitted.

WARNING: Refer to page 8 for clearances to combustible material.

Venting Lengths

MAXIMUM VENT LENGTH: The

system will not operate if there is excessive restriction (pressure drop) in the venting system. A maximum 47’3”

(14,4 m)

of vent pipe may be used provided there is only one 90° elbow in the system. If additional elbows are required: two elbows can be used with 41’ 6”

(12,6 m)

, three elbows can be used

with

35’ 9” (10,9 m)

or four elbows can be

used with 30

’

(9,1 m) of vent pipe.

A 90° elbow is equivalent to 5’9” (1.75 m) of straight pipe. A 45° elbow is equivalent to 3’ 3” (.99 m) of straight pipe.

The termination elbow does not count as an elbow when determining total vent lengths.

The vent can be installed with a slight downward slope of 1/4” per foot of horizontal run toward the vent terminal (see

diagram below). This ensures that any condensate formed during operation of the unit is evacuated from the appliance.

A 1/4” per foot upward slope is acceptable when it is not possible to vent with a downward slope; however, a UL approved Category III Stainless Steel condensate trap MUST be installed at the beginning of the horizontal run. (See page 14 “Example B: Typical Horizontal Termination w/ 1/4” per foot UPWARD Slope” or page 15, “Standard Vertical Vent Termination” for examples).

MINIMUM VENT LENGTH: The venting may be as short as 12” (30 cm), provided one vent termination is installed to the outdoors through a sidewall, one 90° elbow is included in the installation and the wall thimble is installed.

Notice: Make sure that the seam of the vent pipe in horizontal runs is toward the top of the installation (see diagram to the far left).

NO!

YES!

Page 10

Installing the water heater:

Venting Through Closed Spaces

If the coaxial vent piping passes through a closed space, a minimum clearance of 1” (2.5 cm) when installed horizontally or 6”

(15 cm)

when installed vertically should be maintained between the coaxial vent pipe and combustibles and noncombustibles. Be sure to follow local codes and vent manufacturer’s installation instructions.

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

● Two (2) inspection access panels large enough to allow access for

venting inspection. One (1) of these access panels should be close to where the coaxial vent pipe enters the ceiling. The other access panel should be near the vent termination.

● A ventilation access panel with a 16 in2(103 cm2) opening should

be provided every 10 ft (3 m).

downward slope

1/4" per foot

Ceiling

Vent Pipe

Wall Thimble

Board

Inspection

Fire Stop

Access Panel #1

Inspection

Access

Panel #2

Appliance Vent Adapter

The water heater must be installed with a UL 1738 approved Category III Stainless Steel appliance coaxial vent adapter.

Read the following instructions before installation.

● Test fit the adapter over the water heater

collar before proceeding.

● Slide adapter end “A” down over heater

collar “B” as far as it will go.

● Use the screws provided with the vent

adapter to attach the adaptor to the heater collar.

NOTICE: Follow the appliance coaxial vent adapter manufacturer’s instructions.

Draining the Condensate

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

When a water heater is vented horizontally, the vent pipe can have a DOWNWARD or UPWARD slope towards the termination. If an UPWARD slope is used, a condensate trap must be installed as close as practical to the water heater in order to prevent condensate from draining back into the water heater. See Examples A and B on page 14 for DOWNWARD and UPWARD slope for horizontally vented water heaters.

When a water heater is vented vertically, an UPWARD slope must always be used. A condensate trap must be installed in the horizontal section of the vent and as close as practical to the water heater in order to prevent condensate from draining back into the water heater. See the diagram on page 15 showing UPWARD slope for vertically vented water heaters.

Always attach a drain hose to the drain fitting and plumb the hose to a sanitary sewer drain.

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

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

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

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

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

CAUTION: Ensure that the appliance vent adapter is securely attached to the water heater collar.

Exhaust

Flow

Appliance Vent Adapter

Collar

Water Heater

Page 11

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

VVEENNTT TTEERRMMIINNAALL

AAIIRR SSUUPPPPLLYY IINNLLEETT

AARREEAA WWHHEERREE TTEERRMMIINNAALL IISS NNOOTT PPEERRMMIITTTTEEDD

Horizontal Vent Terminal Location

1 In accordance with current CAN/CGA-B149 Installation Codes. 2 In accordance with current ANSI Z223.1/ NFPA 54 National Fuel Gas Code.

* If clearances are not specified, then follow local installation codes and the requirement of the gas supplier. ** For condensing appliances: The vent for this appliance shall not terminate over public walkways, near soffit vents, crawl space vents,

or other areas where condensate or vapor could create a nuisance, hazard or cause property damage, or where condensate or vapor could cause damage or could be detrimental to the operation of regulators, relief valves or other equipment.

H = Clearance to each side of center

line extended meter/regulator assembly. above

3 feet (91 cm) within a height 15 feet

(4.57 m) above the meter/regulator

assembly.

I = Clearance to service regulator

coaxial vent outlet.

3 feet (91 cm) *

J = Clearance to nonmechanical air

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

6 inches (15 cm) for appliances <

10,000 Btuh (3 kW), 12 inches (30 cm)

for appliances > 10,000 Btuh (3kW)

and <

100,000 Btuh (30kW), 36 inches

(91 cm) for appliances > 100,000 Btuh

(30kW).

6 inches (15 cm) for appliances <

10,000

Btuh (3 kW), 9 inches (23 cm) for

appliances > 10,000 Btuh (3kW) and <

50,000 Btuh (15kW), 12 inches (30 cm)

for appliances > 50,000 Btuh (15kW).

K = Clearance to mechanical air

supply inlet.

6 feet (1.83 m)

3 feet (91 cm) above if within 10 feet

(3 m) horizontally.

L = Clearance above paved sidewalk

or paved driveway located on public property.

Not Allowed Not Allowed

M = Clearance under veranda, porch,

deck or balcony.

Not Allowed Not Allowed

CCaannaaddiiaann IInnssttaallllaattiioonnss

UUSS IInnssttaallllaattiioonnss

A= Clearance above grade, veranda,

porch, deck or balcony.

12 inches (30 cm) above anticipated

snow level.

12 inches (30 cm) above anticipated

snow level.

B= Clearance to window or door that

may be opened.

6 inches (15 cm) for appliances <

10,000

Btuh (3 kW), 12 inches (30 cm) for

appliances > 10,000 Btuh (3kW) and <

100,000 Btuh (30kW), 36 inches (91 cm)

for appliances > 100,000 Btuh (30kW).

6 inches (15 cm) for appliances <

10,000 Btuh (3 kW), 9 inches (23 cm)

for appliances > 10,000 Btuh (3kW)

and <

50,000 Btuh (15kW), 12 inches

(30 cm) for appliances > 50,000 Btuh

(15kW).

C= Clearance to permanently closed

window.

* *

D= Vertical Clearance to ventilated

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

* *

E= Clearance to unventilated soffit.

* *

F= Clearance to outside corner.

* *

G= Clearance to corner.

* *

IXED

OSED

ABL

FIXE

CLO

Page 12

Installing the water heater:

Additional Considerations

Do NOT install vent terminal under any patio or deck.

To help prevent moisture from freezing on walls and under eaves, do not locate vent terminal on the side of a building with prevailing winter winds.

To help prevent water lines from freezing, do not locate vent terminal on the side of a building with prevailing winter winds.

Do NOT locate vent terminal too close to shrubbery, as flue gases may damage them.

Caulk all cracks, seams and joints within six (6) feet (1.8 m) of vent terminal.

Caulk around thimble face plate for weather tight seal.

All painted surfaces should be primed to lessen the chance of physical damage. Painted surfaces will require maintenance.

Do NOT extend exposed vent pipe of indoor water heaters outside of building.

Guard vent against accidental contact with people and pets.

Indoor Water Heater

WARNING: Moisture in the flue gas will condense as it

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

Inside Corner

Caulk

6’ (1.8 m)

Caulk Zone

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

Caulk

Rising moisture will collect under eaves.

6’

4’

1 ft. sq. (30 x 30 cm) sheet metal plate on brick or masonry surface, recommended.

(1.8 m)

6’ (1.8 m) Caulk

zone or to edge of window

etc.,starting within 6’ (1.8 m).

RTV silicone caulk

(1.2 m)

Page 13

Example A: Typical Horizontal Termination

w/ 1/4” per foot DO

WNWARD

Slope

Installing the water heater:

Page 14

Installing the water heater:

Vertical Vent Installation

A fire stop plate should be installed at every penetration of a floor or ceiling if the vent is not running in a fire-rated shaft. Maintain the recommended air space clearance to combustible materials and building insulation.

Once the vent terminal location has been determined, make a hole through the roof and interior ceiling to accommodate the vent pipe. Complete the vent pipe installation to the water heater’s vent connector fitting on the

water heater vent collar outlet. Support vertical or horizontal runs as previously mentioned. If required, use silicone sealant at the point the vent connector joins the water heater.

Install adequate flashing where the vent pipe passes through the roof. Determine the vent terminal height and install the vent pipe accordingly. Refer to the diagram above for proper vent terminal height.

The vent roof system must terminate at least 1 foot (30 cm) above the roof line and at least 2 feet (61 cm) higher than any portion of the building within 10 feet (3 m).

Install supports every 5 feet (1.5 m) vertically along the vent pipe route. Vertical supports are required after every transition to vertical and are required after every offset elbow. When the vent is free-standing and penetrates a roof/ceiling, another means of support must be used at a second location.

Follow the vent manufacturer’s recommended installation instructions provided with the vent purchased from the manufacturer.

Standard Vertical Vent Termination

Vertical Vent Termination Location

The location of the vent terminal depends on the following minimum clearances and considerations (see diagram at left):

Minimum twelve (12) inches

(30 cm)

above roof.

Minimum twelve (12) inches

(30 cm)

above anticipated

snow level.

Maximum twenty-four (24) inches

(60 cm)

above roof level

without additional support for vent.

Four (4) feet

(1.2 m)

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

Ten (10) feet

(3 m)

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.

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

Notice: Follow vent manufacturer’s installation instructions and their recommended clearances to combustibles as required.

Min. 12"

(30 cm)

Above Roof

Min. 12"

(30 cm)

Above Anticipated

Snow Level. Max. 24"

(60 cm)

Above Roof (Without Additional Support)

Vent Pipe Through Roof

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

Vertical Termination

Firestop

Adapter

Air Intake

Adjustable Roof Flashing

Storm

Collar

Roof Jack

3“/ 5” Concentric Pipe

Support

Clamp

Chase Requires

6" (15 cm) Clearance

to Combustibles

1/4" per foot upward slope

3" (8 cm) Clearance

(61 cm)

Max

Condensate

Vent Adapter

Support Hanger

Tr ap

To Drain. Dispose of

condensate in accordance

to local codes

Firestop

Page 15

Water Supply Connections

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

Mounting the Water Heater

Make sure the location of the appliance allows for easy access and operation.

Wall studs should be utilized when mounting the water heater to the wall. Alternately, a suitable piece of wood may be placed inside or outside of the wall to span the distance between the wall studs. Fasten the water heater mounting brackets to the wood.

In case of dry wall or concrete wall, use drywall anchors or lag bolts.

The water heater requires 120VAC/60Hz. Have a receptacle with ground terminal near the water heater. The length of the power supply cord is 10 feet (3 m).

Install a wood screw for the upper bracket with a clearance of 1/8” (.32 cm) between the wall and the screw head. Hang the center of the upper bracket on the screw.

Using a wood screw and a washer, affix the

lower bracket to the wall (Left and Right). Repeat to affix the top bracket.

The brackets can be adjusted to change the distance between the back of the appliance and the wall within the range of 3/8” (.95 cm) to 1-1/2” (3.8 cm).

Loosen the adjustment screws of both the top and the bottom brackets to adjust the distance (See diagram below).

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

Use approved plumbing materials only.

The diameter of the pipe lines should be a minimum of 3/4”.

To conserve energy and to prevent freezing, insulate both cold and hot water supply lines. DO NOT cover the drain or pressure relief valve.

To ensure proper operation of the water heater, the following water pressure guidelines should be followed:

● Operation of the water heater requires the

minimum water pressure of 14 psi (97 kPa) and a minimum water flow rate of 0.66 gpm (2.5 lpm).

● A water pressure of 40 psi (276 kPa) is

required to achieve maximum flow rate.

● To maintain proper performance, ensure

sufficient water supply pressure. The

Required Water Pressure = Min. Operating Water Pressure (14 psi [97 kPa]) + Pipe Pressure Loss + Faucet and Shower Pressure Loss + Safety Margin (more than 5 psi [34 kPa]).

● To supply hot water to upper floors,

additional water pressure (0.44 psi/ft [10 kPa/m]) must be ensured. The measurement should be calculated by the distance between the water inlet of the water heater (ground level) to the hot water faucet (upper floor level).

● Well water systems should be set to ensure

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

● When the water is supplied from a water

supply tank, the height of the tank and the diameter of the pipes and their relation to water pressure should be taken into consideration. Gravity water pressure is

not recommended.

CAUTION: Reinforcement of the wall is required in case the wall is not strong enough to hold the appliance.

Thermal Expansion

A thermal expansion tank will be required if the water heater is installed in a closed loop system to prevent damage to heater, related piping and relief valve. Replacing the relief valve will not correct the problem! 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.

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

1/8" (.32 cm)

Clearance

Upper Bracket

Washer

Wood Screw

Washer

Wood Screw

Lower Bracket

TOP

Adjustment Screws

Bracket

Adjustment Screws

BOTTOM

Page 16

Installing the water heater:

Water Supply Connections, continued

Notice: If the water flow resistance of a

shower head is too high, the burner in the water heater will fail to ignite. Keep the shower head clean from debris that could cause additional pressure drop.

Notice: If using mixing valves on the outlet, choose one that prevents cold water pressure from overcoming hot water line pressure.

Notice: If multiple water heaters are installed in a manifold system, the water piping must be in “Parallel”. A water pressure of 40 psi (276 kPa) is recommended for each water heater for proper operation of the water heaters.

Alternate Water Piping Arrangement with Optional Valve Kit

Valve kits may be purchased and installed as optional items. Contact your distributor or place of purchase for details.They allow for one person full diagnostic testing and ease of flushing the system. The kit includes two full port isolation valves, one for the cold side and one for the hot side. Refer to page 22.

Install a shutoff valve near the inlet of the water heater for service and draining purposes.

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

Before connecting the water supply pipe to the water heater, open the shutoff valve and clean out sand, debris, air, caulking material, etc. inside the pipe. Connect to the water inlet, then check water flow. Close the shutoff valve and clean the water filter.

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

Installation of unions or flexible copper connections are recommended on the HOT and COLD water lines, so that the water heater may disconnect easily for servicing, if necessary.

Install a Check Valve between the water heater and the water shutoff valve (see the top left diagram).

The following should be addressed in regards to the HOT WATER OUTLET:

● Connections between the water heater

and point(s) of use should be as short and direct as possible.

● DO NOT use lead or plastic pipe.

● To conserve energy and minimize heat

loss, insulation of hot water piping is recommended (see Hot and Cold Pipe Insulation Installation on page 24).

Notice: The flow rate of hot water may vary when more than two faucets (appliances, fixtures, etc.) are being used simultaneously.

Notice: The pipes MUST be completely drainable. If the hot water faucets are located at a point higher than the water heater, place a drain valve at the lowest point (see diagram at the left).

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

● With clean, potable water

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

● With inlet water

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

● Free of lime and scale

deposits.

● DO NOT reverse the hot

and cold water connections. The water heater will not operate.

Notice: Use only teflon tape on cold and hot water connections and lines.

This appliance is not intended for space heating application. Do not connect this heater to waterlines previously used for space heating or non-potable water distribution. All water piping and components shall be suitable for potable water.

Alternate

Vertical Vent Termination with

Rain Cap

Water Filter

Clean the Water Filter

Water Inlet

Check Valve

Nipple

Wat er

Air

Relief

Va lv e

Hot

Water

Tap

Storm Collar

Roof Jack

Rain Cap

Adjustable Roof Flashing

Drain Valve

Page 17

Relief Valve

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

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

● The pressure rating of the relief valve

must not exceed 150 psi (1034 kPa), 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.

● No valve of any type should be installed

between the relief valve and the water heater

● Discharge from the relief valve should be

piped to a suitable drain to eliminate potential water damage. Piping used should be of a type approved for the distribution of hot water.

● Hot and cold water lines should be

insulated up to the water heater. Refer to page 23 for details.

● The discharge line must be NO

SMALLER than the outlet of the relief valve and must pitch downward 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.

Notice: Local codes govern the installation of relief valves. If local codes require that a temperature and pressure relief valve should be installed, the manufacturer recommends a type 40XL Watts T&P relief valve or an equivalent model be used.

Notice: Manual operation of relief valves should be performed at least once a year. Turn off the electrical power and gas shutoff valve. Lift and release lever on the relief valve and check the manual operation of the relief valve. You should take precaution to avoid contact with the hot water coming out of the relief valve and to prevent water damage.

Notice: If the relief valve on the system discharges periodically, a problem exists and service to the water system is required.

The vinyl tubing as shown is supplied and connects to the drain valve located at the hot water outlet as shown in the diagram at left. Route the other end of the vinyl tubing to the drain pan or a suitable drain where leakage from the heater will not result in damage to the area adjacent to the heater or to lower floors of the structure.

Notice: The above illustrates a pressure-only relief valve. If local codes require a combination temperature and pressure relief valve be installed, an extension piece may be needed to ensure that the valve probe is not directly in the flow path of the water.

Drain Valve

shown on

right without

tubing.

Drain

Valve

Pressure Relief Valve

Union

Water

Shutoff

Relief

Valve

Discharge

Line

Valve

Hot Water

Supply Outlet

Drain Tube to suitable

drain

Water Supply

Cold

Inlet

Page 18

This water heater is certified for installations up to 3,280 feet (1000 m) above sea level. The input rating of this water heater is based on sea level operation. At higher elevations, the actual input rate may be lower than the value listed on the rating label.

NOTICE: Select High Altitude models are available. One model is available for use at elevations above 3,280 feet (1,000 m) up to 6,560 feet (2,000 m), and an additional model is available for use at elevations above 6,560 feet (2,000 m)

up to 9,840 feet (3,000 m).

NOTICE: For installations above 3,280 feet (1,000 m) elevation, the Altitude Chip on the PC board must be replaced. Do not install this water heater at elevations above 3,280 feet (1,000 m) without installing the proper Altitude Chip. Please contact your installer, local gas supplier, place of purchase or the Customer Service phone number as listed in this Use & Care Manual for more information.

High Altitude

Installing the Main Remote Control:

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 supplied Manual Gas Appliance Shutoff Valve must be installed at the gas connection of the water heater at the time of installation (see diagram to the left).

The branch gas supply line to the water heater should be a minimum of 3/4” 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) ANSI Z223.1 and CAN B149 code mandates a manual gas shut-off valve: See NFGC & B149 for complete instructions.

If flexible connectors are used, the maximum length shall not exceed 36” (91 cm).

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.

A sediment trap should be installed at the bottom of the gas line.

Do not use excessive force (over 31.5 ft lbs. [42.7 Nm]) in tightening the pipe, particularly if teflon pipe compound is used, as the unit may be damaged.

The inlet gas pressure to the water heater must not exceed 10.5” w.c. (2.6 kPa) for natural or 14” w.c. (3.5 kPa) for LP gas. For purposes of input adjustment, the minimum inlet gas pressure (with main burner on) is shown on the water heater rating plate. If high or low gas pressures are present, contact your gas supplier for correction.

NOTICE: To ensure proper operation of the heater the gas pipe and gas meter must be sized correctly.

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

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 gas shut-off valve(s) to 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 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 the system at pressures in excess of 1/2 psi (14” w.c. [3.5 kPa]).

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. [3.5 kPa]).

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

WARNING: Install a gas pressure regulator, in the gas supply line, which does not exceed the maximum supply pressure.

DO NOT use an industrial type gas regulator.

Manual

Gas

Supply

Line

Shutoff

Manual Gas

Appliance

Shutoff

Union

Sediment Trap

Cap

Page 19

Remote Control Installation

One (1) remote control is provided with the water heater. Additional remote controls may be purchased separately. Up to three (3) remote controls can be used with this water heater.

The following are considerations for determining the location of the remote control(s):

●●

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

●●

Place remote control out of children’s reach.

●●

The remote control can be installed in convenient locations such as the kitchen, laundry room, utility room, or directly beside the water heater.

●●

Avoid areas where the remote control may be exposed to heat, e.g. ranges or heaters.

●●

Avoid areas where the remote control

may be subjected to oil and/or steam from cooking.

●●

Avoid areas where chemical agents (such as thinner, benzine and alkalines) are used.

●●

Avoid areas of direct sunlight.

●●

The MAXIMUM distance between the water heater and the remote control installation location is limited to 195 feet (59 m) of wire.

NOTICE: Only one of each type of remote controls can connect to the water heater. Therefore, a maximum of three controls can connect to the water heater.

No other manufacturer’s controls are suitable for use with this water heater.

DO NOT attempt to disassemble the remote control.

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

Remote Control

Model

Number

Remote Control

Description

Temperature

Set Point

Range

Availability

USC1-117 BATH 1

100°F–120°F

(38°C)–(49°C)

Optional (Sold

Separately)

USC2-117 BATH 2

100°F–120°F

(38°C)–(49°C)

Optional (Sold

Separately)

UMC-117 MAIN

100°F–120°F

(38°C)–(49°C)

Factory Default

125°F–140°F

(52°C)–(60°C)

With Dip Switch

Adjustment

NOTICE: The provided remote control will allow a maximum temperature setting of 120°F (49°C). Temperatures of up to 140°F (60°C) can be achieved with dip switch adjustment. Only qualified service personnel should perform this adjustment.

NOTICE: An optional cable (EZ Link Cable

™

) can be purchased separately to manifold two heaters together.

MAIN

Control

Base Plate

PRIORITY

°F

ON/OFF

Control screw

Mounting Screw x 2

Page 20

Installing the Main Remote Control:

Page 21

Electrical Connection

POWER CORD:

● The electric power supply requirement

for this water heater is 120 VAC/60HZ, 2 Amps.

● The water heater comes with a three (3) pin

power supply cord. Use only a power outlet with a ground terminal.

● The installation of an electric leakage

breaker is recommended.

● Keep any excess of the power supply cord

on the outside of the water heater.

● If local codes require hardwiring, see

instructions for “Hardwiring the Electrical Connections”.

HARDWIRING THE ELECTRICAL CONNECTIONS:

● Wiring should be carried out by a qualified

electrician in accordance with local codes.

● The water heater requires 120 VAC/60Hz and

should be properly grounded.

● DO NOT connect grounding wire to water

pipes, gas pipes, telephone cables, lightning conductor circuits and to grounding circuit of other equipment that carry a ground-fault interrupter.

● An ON/OFF switch must be provided and

installed for the incoming 120VAC power.

● Wire the water heater exactly as shown

below. A wiring diagram is also found inside of the cover panel.

● A green screw is provided in the enclosure

for a grounding connection.

● Connect the live wire to black leg wire and

the neutral wire to the white neutral wire.

WARNING: Shock hazard line voltage is present. Before servicing the water heater, turn off the electrical power to the water heater at the main disconnect or circuit breaker. Failure to do so could result in severe personal injury or death.

CAUTION: Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper and dangerous operation. Verify correct operation after servicing.

WIRING DIAGRAM

SW1

MIN

BUTTON

SW3

ADJUSTER

234

BUTTON

DIP SWITCH

FLAME ROD1 FLAME ROD2

OVER HEAT LIMITER

WATER FLOW SENSOR

GND

BK BK

RESISTOR

FOR DIRECT-VENT MODEL ONLY

W W

R BK BR

G/Y

SV2

VALVE 2

SOLENOID

SV1

SOLENOID

SW2

MAX

VALVE 1

OFF

GAS INLET

WATER VOLUME

CONTROL MOTOR

LIMITER

BK8RGR Y B OWBR

USUALLY DISCONNECTED

M L

SV0

AIR AMBIENT

VALVE 0

SOLENOID

MOTOR

LED

CIRCUIT

BOARD

THERMISTOR

INLET WATER

8 7

6 5

2 1

3 2 1

BK BK

R3R4

EXCHANGER HEAT

THERMISTOR

HOT WATER OUTLET

THERMISTOR

BATH REMOTE CONTROL2

(USC2-117)

FAN

123

MOTOR

W O Y

FOR

DIRECT-VENT

MODEL ONLY

CONNECTOR FOR CHECKING

THERMOELECTROMOTIVE FORCE

IGNITER

WATER BY-PASS SOLENOID VALVE

GR GR

GY GY

W W

THE CONNECTORS OF DUAL AND MULTIPLE ARE INTERAPPLICABLE TO THE BODY CONNECTORS EACH OTHER.(RED)

(RED)

2 1

FOR INDOOR, DIRECT-VENT MODEL ONLY

BATH REMOTE CONTROL1

(USC1-117)

USUALLY

DISCONNECTED

6 5 4

3 2 1

I J

THERMOCOUPLE

ANTI-FROST HEATER

6 5 4

MAIN REMOTE CONTROL

(UMC-117)

FUSE (5A)

PSV

VALVE

R:RED W:WHITE BR:BROWN BK:BLACK B:BLUE GY:GRAY GR:GREEN O:ORANGE Y:YELLOW G/Y:GREEN/YELLOW

ELECTRODE

FUSE(3A)

WW W

W W

COLOUR CODE

FOR INDOOR, DIRECT-VENT MODEL ONLY

GND

31-80469 0

G/Y

AC 120V

Page 22

Installing the water heater:

Typical Installation of Water Heater (Venting Required)

Page 23

For increased energy efficiency, use pipe insulation. Please install the insulation according to the diagram above, making sure

to insulate all the way to the top. Do not cover any drain or pressure relief valve(s).

Do’s

❑ Do follow all installation instructions

covered in this manual.

❑ Do check inlet gas pressure to ensure

that it is within the range specified on the rating plate.

❑ Do provide adequate air for combustion

and ventilation as discussed in the Use & Care Manual and the National Fuel Gas Code (CAN/CGA B149 in Canada).

❑ Do maintain proper clearances to

combustibles and non-combustibles as specified on the nameplate.

❑ Do ensure that the venting system complies

with the guidelines found in the Use & Care Manual and National Fuel Gas Code (CAN/CGA B149 in Canada).

❑ Do contact local gas company to ensure gas

meter and gas piping are adequately sized.

❑ Do use teflon tape on water line

connections and fittings.

Don’ts

❑ Don’t block or restrict Air Intake

Opening located on the front cover of the water heater.

❑ Don’t remove the front cover unless

absolutely necessary. This should only be done after being examined by a qualified service technician.

❑ Don’t install this product where standing

water may occur.

❑ Don’t use pipe dope on water line

connections and fittings.

During Installation of this water heater…

Hot and Cold Pipe Insulation Installation

Insulation Blankets

Insulation blankets, available to the general public for external use on gas water heaters, are not necessary. The purpose of an insulation blanket is to reduce the standby heat loss encountered with storage tank heaters. This water heater does not store water 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 air inlet, flue outlet or

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

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

NOTICE: The hot and cold pipes should be insulated as shown to provide additional freeze protection.

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

Pipe Insulation

Drain Valve

Hot Water Service Valve

Pressure Relief Va lv e

Water Inlet

Cold Water

Service Valve

Page 24

Installing the water heater:

A. Indoor Water Heater Location

❑ Close to area of vent termination. ❑ Indoors and protected from freezing temperatures. ❑ Proper clearance from combustible surfaces observed. ❑ Sufficient fresh air supply for proper operation of

water heater.

❑ Air supply free of corrosive elements and

flammable vapors.

❑ Provisions made to protect area from water damage. ❑ Sufficient room to service heater. ❑ Combustible materials, such as clothing, cleaning

materials, rags, etc. clear of the heater and vent piping.

❑ Water heater is properly attached to the wall.

B. Water Supply

❑ Water supply has sufficient pressure. ❑ Air purged from water heater and piping. ❑ Water connections tight and free of leaks. ❑ Water filter is clean and in place. ❑ Materials used are as instructed in this manual. ❑ Water pipes are insulated and protected from

freezing.

C. Gas Supply

❑ Gas type matches rating plate. ❑ Gas supply pressure is sufficient for the water heater. ❑ 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.

❑ Gas Company inspected installation (if required).

D. Relief Valve

❑ Pressure Relief Valve properly installed and discharge

line run to open drain.

❑ Discharge line protected from freezing.

E. Co-Axial Venting

❑ Vent pipe material should be category III and meet

UL1738 in US and ULC S636 in Canada.

❑ Connector(s) pitched (1/4” per foot of length

minimum) DOWNWARD or UPWARD to termination. If UPWARD, a condensate trap must be installed close to the heater. See page 14.

❑ Connector(s) securely fastened together with high

temperature silicone (500°F [

260°C])

and

air-tight.

❑ All co-axial vent runs are properly supported. ❑ Vent terminal is properly installed. ❑ Sufficient combustion air is available. ❑ Maximum and minimum vent lengths are observed.

F. Electrical Wiring

❑ Voltage matches rating plate. ❑ Water heater is properly grounded. ❑ Supply cord and/or wiring meets all local codes.

Installation Check List

Page 25

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.

Page 26

Time/Temperature Relationship in Scalds

Water Temperature Time To Produce a Serious Burn

120°F (49°C) More than 5 minutes 125°F (52°C) 11/

2 to 2 minutes

130°F (54°C) About 30 seconds 135°F (57°C) About 10 seconds 140°F (60°C) Less than 5 seconds 145°F (63°C) Less than 3 seconds 150°F (66°C) About 11/

seconds

155°F (68°C) About 1 second

Table courtesy of Shriners Burn Institute

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

Water Temperature Setting

The temperature of the water in the water heater can be regulated by setting the temperature on the front of the remote control.

Safety factors should be considered when selecting the water temperature setting of the water heater’s remote control.

The remote control was set at 100°F (38°C) before the water heater was shipped from the factory. This is the recommended starting point.

Water temperatures above 125°F (52°C) 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.

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 below may be used as a guide in determining the proper water temperature for your home.

Safety Precautions

Do turn off manual gas shut-off valve if water heater has

been subjected to overheating, fire, flood, physical damage or if the gas supply fails to shut off.

Do Not turn on water heater unless water and gas supplies are fully opened.

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 lights, 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.

Operating the water heater:

Page 27

Water Temperature Setting…

Maximum water temperature occurs while the burner is on. To determine the water temperature, turn on a hot water faucet and place a thermometer in the water stream. Water temperature at the faucet may vary depending on season and length of pipe from the water heater.

The factory setting of the remote control temperature range is between 100°F (38°C) and 120°F (49°C).

The remote control is factory preset to 100°F (38°C).

To turn the remote control ON or OFF, press the POWER button.

To adjust the temperature to a required setting, press the UP arrow temperature button.

Pressing the UP or DOWN temperature adjustment buttons will change the temperature set point.

The temperature set point on the remote control cannot be increased above 112°F (44°C) when a hot water faucet is in the open position.

The hottest temperature water will be at the hot water faucet closest to the water heater.

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 water heater is equipped with a device that will shut off the gas supply to the burner if the water heater exceeds normal operating temperatures. Refer to the “Before You Call For Service” section located near the back of this manual, or contact your dealer.

WARNING: Should overheating occur or the gas supply fail to shut off, turn off the manual gas control valve to the appliance.

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

Notice: The water heater may not operate with a small water flow. In such case, increase the water flow. If water heater still does not operate and hot water faucet is completely open, increase the temperature setting on the remote control.

* Temperatures above 120°F (49°C) can be achieved by adjusting the dip

switch. See page 35 for dip switch adjustment.

In Use Indicator (Lit during operation)

LED Display

(Displays water

temperature and error

codes)

ON/OFF Indicator

Temperature

Adjustment

Buttons

Priority Indicator

Notice: The remote control cannot be turned on when water is flowing or circulating through the water heater.

Notice: Display shows °F only.

PRIORITY

°F

POWER

ON/OFF

Higher (Hotter) Lower (Cooler)

100 102 104 106 108 110 112 114 116 118 120* 125 130 135 140 °F

38 39 40 41 42 43 44 46 47 48 49* 52 54 57 60 °C

Page 28

Care and cleaning of the water heater:

Routine Preventative Maintenance

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

It is recommended that a periodic inspection of the burner, relief valve, air intake filter, water filter and venting system should be made by service personnel qualified in gas appliance repair.

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

At least once a year, lift and release the lever handle on the pressure relief valve, located in the hot outlet piping 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 pressure relief valve on the hot water heater discharges periodically, this may be due to a problem in the water system. Contact the water supplier or your plumbing contractor on how to correct this. DO NOT plug the relief valve outlet.

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.

Inspect the area around the water heater to ensure a safe operating environment. Keep appliance area clear and free from combustible materials, gasoline and other flammable vapors and liquids.

Ensure the unit has not been damaged. If damage or denting is present, contact a service personnel to verify proper operation.

Check for any abnormal sounds during normal operation of the water heater.

All piping should be checked for gas and/or water leaks. Refer to page 18 of this manual for instructions on leak testing.

The air intake and cold water supply filters should be cleaned monthly. Refer to the “Housekeeping” section for further information.

DO NOT operate the water heater if you feel something is wrong with the unit.

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

Notice: After inspection, maintenance and/or cleaning, ensure proper operation by turning on a hot water faucet.

Housekeeping

Before performing Housekeeping tasks to this water heater, turn the unit off and disconnect the power supply.

Vacuum around the water heater for dust, dirt and lint on a regular basis.

Clean the water heater and remote control by using a damp soft cloth with a few drops of mild detergent and gently wiping the surfaces of the unit. Wipe any remaining moisture with a dry soft cloth.

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

DO NOT block or obstruct the air intake opening of the water heater. A minimum of 12” (30 cm) is required between this combustion air inlet opening and any obstruction.

The Air Intake and Water filters should be cleaned on a monthly basis.

HOW TO CLEAN THE WATER FILTER:

● Make sure the unit is OFF and the

electrical power supply has been disconnected.

● Turn the water supply OFF to the

heater.

● Drain heater. See “Draining The

Water Heater” section on page 30.

● Unscrew the water filter, and slide the

filter out.

● DO NOT tap the filter as it may deform

and/or damage the filter.

● To remove severe sediment and dirt, use

a soft brush and wash with running water.

● Return the filter to the water heater and

screw in the filter.

● Turn the electrical power supply and

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

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.

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

DANGER: Shock Hazard

Make sure the electrical power to the water heater is off to avoid potential serious injury or damage to components.

Page 29

CAUTION: Do not operate without the condensate trap connected to the vent and routed to the proper drain.

Condensate Trap Inspection

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

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

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.

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.

Venting System Inspection

The venting system of a direct vent water heater should be inspected annually to ensure all of the vent sections are secure and airtight.

It is recommended that qualified service personnel familiar with Category III venting inspect the venting system.

Check vent connection joint sections with a solution of soapy water to assure air-tightness while the unit is operating.

Bubbles around a joint connection indicates a seal leak. Refer to page 9 for vent sealing instructions.

DO NOT operate the unit if vent system shows signs of leaking exhaust.

Check to make sure that the air intake and vent outlet on the termination has not been blocked or contain debris.

Burner Inspection

Visually inspect the main burners annually.

Through the side sight glass, inspect the burner flame. Blue flames should be seen when the main burner is firing. See the figure on the left for location of sight glass.

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, burner inspection and cleaning should be performed only by qualified service personnel.

For cleaning, a vacuum cleaner can be used on the burner.

Page 30

Draining the Water Heater

WARNING: Failure to drain the water heater can cause serious damage to the water heater as well as personal injury.

Below are instructions for draining water out of the water heater.

Turn off the switch on the remote control.

Close the gas shut-off valve(s).

Unplug the power supply cord (or disconnect breaker) at least 10 seconds after step #1.

Open all hot water faucets. Before proceeding to the next step, make sure that COLD water is coming out of all hot water faucets.

Close the water shut-off valve.

Using a suitable container to catch water, remove the water filter from heater. Attach a garden hose to the drain valve installed in the hot water outlet line and direct the

stream of water to a suitable drain where it will cause no damage. Leave water heater as is until next use.

o put the water heater back into operation

after draining, follow the steps below.

Reinstall the drain plug and water filter. Close the hot water outlet drain valve.

Open the water shut-off valve and close again after making sure that water comes out from hot water faucets. (This step is to remove air from the water lines.)

Plug into an electrical outlet, fully open the gas shut-off valve and the water shut-off valve.

NOTICE: The water heater may not operate unless the above procedure is followed correctly.

Draining the water heater

WARNING: Failure to follow these instructions while draining the water heater can cause serious damage to the water heater as well as personal injury, including scalding.

NOTICE: DO NOT unplug the electric power supply cord for freeze protection.

Care and cleaning of the water heater:

Freeze Protection

Where the water heater may be exposed to freezing conditions, even for a short period of time, be sure to drain all water from the unit as instructed above.

Exposure to freezing conditions can occur from down draft of venting system or from installation in areas exposed to cold air.

The water heater is equipped with a Freeze Protection Electric Heater. As long as electricity is supplied to the water heater, it prevents freezing inside the water heater down to an ambient temperature of approximately

-20°F (-28°C) (without wind conditions).

This device only protects the internal components of the water heater. It does NOT protect piping and valves. Therefore, piping and valves should be wrapped with insulation material as instructed on page 23.

Another method of freeze prevention is by running a small volume of water. Running water will protect the water heater, piping and valves.

Follow the steps below to ensure proper water flow through the water heater and piping:

Turn off the switch on the remote control.

Close the gas shut-off valve.

Open the hot water faucet slightly until a stream of approximately 1/8” (.32 cm) is flowing. Be sure to check the flow periodically.

Water Inlet

Water Outlet

Drain

Pressure Relief Valve

Hot Water Service Valve

Cold Water Service

Valve

Optional Maintenance Method

Isolator valve kits may be purchased as optional items from manufacturer, distributor or place of purchase. They allow for one person full

diagnostic testing and ease of flushing the system.

The kit includes two full port isolation valves, one for the cold side and one for the hot side.

CAUTION:

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

PRIORITY

∞F

POWER

ON/OFF

To Hot Water

Faucet(s)

Page 31

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.

CAUTION: For your safety, DO NOT attempt repair of electrical wiring, gas piping, remote control, burners,

vent connectors or other safety devices. Refer repairs to qualified service personnel.

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

and dangerous operation. VERIFY PROPER OPERATION AFTER SERVICING.

Problem Possible Cause What To Do

Not enough or no hot water. Water Shutoff valve is not fully opened.

● Check shutoff valve and open fully.

Hot water faucet is not fully opened.

● Open hot water faucet completely.

(The main burner goes off when incoming water volume is inadequate.)

Water piping is frozen.

● Allow piping to thaw.

No electricity or water supply is cut off.

● Check that proper power is being

supplied and/or water supply is adequate.

Unit is not “ON”.

● Turn the unit “ON” by the button on

the remote control.

The temperature may be set too low.

● Increase the temperature setting.

Mixing Valve Malfunctions (if applicable)

● Check and replace if necessary.

Error code displayed on remote control.

● See instructions for Error Code and if

required, contact a dealer for service.

Not enough water demand.

● Increase water flow.

Water inlet filter clogged.

● Clean water inlet filter.

Fixture aerator is clogged.

● Clean aerator.

Scale buildup in heat exchanger.

● Check for error code. If required,

contact a dealer for service.

Hot and cold water lines reversed.

● Reverse water connections.

Water not hot enough. The temperature may be set too low.

● Check and open the gas valve fully.

The gas valve is not fully opened.

● Call your gas company to verify the

gas meter and gas piping size.

Gas supply pressure is low.

● Call dealer for service.

Bleed over in one of the hot water fixtures.

● Decrease the temperature setting.

Water too hot. Temperature is set too high.

● Check shutoff valve and open fully.

Water shutoff valve is not fully opened.

● Allow more water to flow.

Small amount of water has been heated.

● Normal operation. There is no need

to call for service.

Fan continues to rotate after hot water faucet is closed.

This function is to supply hot water when the hot water faucet is reopened.

● Normal operation. There is no need

to call for service.

CAUTION: Make certain power to water heater is “OFF” before removing protective cover FOR ANY REASON.

Page 32

Error Code Guide:

When an error code is displayed:

● Close the hot water faucet, turn off the switch on the remote

control.

● Wait for about 5 minutes before turning the switch on

again.

● Open the hot water faucet.

If the error code remains in the display:

● Close the hot water faucet and turn off the switch on the

remote control.

● Take the proper action shown below and attempt operation

of the appliance again.

If the error code is still shown:

● Turn off the hot water faucet and turn off the switch on the

remote control.

● Take note of the error code displayed and call the customer

service assistance number in the “If You Need Service” section of the manual on the back cover.

Notice: If an error code other than those listed below is displayed, immediately turn off the hot water faucet, take note of the error code, turn off the switch on the remote control and call the customer assistance number.

CAUTION: For your safety, DO NOT attempt repair of gas piping, remote control, burners, vent connectors or other

safety devices. Refer repairs to qualified service personnel.

CAUTION: Make certain power to water heater is “OFF” 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.

Error Code Possible Cause What To Do

11 The Gas Shutoff Valve is not opened

completely.

● Open the Gas Shutoff Valve

completely.

12 Gas Service has been interrupted.

LP Gas is running low. (LP models only)

● Contact Gas Utility Company.

● Fill up LP Gas container or replace

with a new cylinder of LP Gas.

15 The hot water faucet is not opened enough.

● Open the faucet more to secure

enough volume.

(Every 60 seconds you hear

an alarm or when the faucet is

closed, the alarm stops.)

Air intake or vent termination may be blocked.

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

● Remove any obstructions on the air

intake or vent termination.

● Contact a dealer for service.

13 If the error code is still displayed after

taking the above steps.

● Contact a dealer for service.

1L Water heater has build up of lime deposits.

● Contact a dealer for service.

Page 33

Page 34

Required adjustment for up to 140°F (60°C) water temperature settings

WARNING: Refer to scald potential warnings on page 4 before

making adjustment. Changing this setting is done at your own risk.

DO NOT alter the #4 DIP Switch if the setting of up to 140°F (60°C) is not required.

Follow the instructions below if it is determined that a setting of up to 140°F (60°C) is required.

●●

Turn off remote control. Turn off the gas and water shutoff valves.

●

Remove the front cover.

● Find the DIP Switch #4 located at the top left hand side of the PCB.

(See diagram to the right for DIP Switch location).

● Change the DIP Switch #4 setting to the “ON” position. DO NOT alter

any other DIP Switch. The LED on the PCB is flashing. At the same time, the display of the Main Remote Control starts to flash.

● Press the “SW1” button on the left hand side of the PCB for more than 1

second. The LED on the PCB starts illuminating continuously. At the same time, the display of the Main Remote Control is on continuously.

● Change the DIP Switch #4 setting back to the “OFF” position. DO NOT

alter any other DIP Switch. The LED on the PCB will stop illuminating. At the same time, the display of the Main Remote Control will turn off.

● Attach the unit’s front cover.

● Turn on the remote control, gas and water shutoff valves.

● Check and ensure safe operation and performance of the water heater.

See steps below to LIMIT maximum water temperature setting to 120°F (49°C).

Follow first four bullets points listed above, then continue as listed below:

● Press the “SW2” button on the left hand side of the PCB for more than 1

second. The LED on the PCB starts illuminating continuously. At the same time, the display of the Main Remote Control is on continuously.

● Change the DIP Switch #4 setting back to the “OFF” position. DO NOT

alter any other DIP Switch. The LED on the PCB will stop flashing. At the same time, the display of the Main Remote Control will turn off.

● Attach the unit’s front cover.

● Turn on the remote control, gas and water shutoff valves.

● Check and ensure safe operation and performance of the water heater.

Page 35

Notes:

Page 36

IF YOU NEED SERVICE

1. Should you have any questions about your new water heater, or if it requires adjustment, repair, or routine maintenance, it is suggested that you first contact your installer, plumbing contractor or previously agreed upon service agency. In the event the firm has moved, or is unavailable, refer to the telephone directory, commercial listings or local utility for qualified service assistance.

2. Should your problem not be solved to your complete satisfaction, you should then contact the Manufacturer’s National Service Department at the following address:

2600 Gunter Park Drive Montgomery, Alabama 36109-1413 Phone: 1-800-432-8373.

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

a. Model and serial number of the water heater as shown on the rating plate attached to the front panel

of the heater.

b. Address where the water heater is located and physical location. c. Name and address of installer and any service agency who performed service on the water heater. d. Date of original installation and dates any service work was performed. e. Details of the problem as you can best describe them. f. List of people, with dates, who have been contacted regarding your problem.

The Commonwealth of Massachusetts requires compliance with regulation 248 CMR 4.00 and 5.00 for installation of through – the – wall vented gas appliances as follows:

(a) For direct-vent appliances, mechanical-vent heating appliances or domestic hot water equipment, where the bottom of the vent terminal and the air intake is installed below four feet above grade the following requirements must be satisfied:

1. If there is not one already present, on each floor level where there are bedroom(s), a carbon monoxide detector and alarm shall be placed in the living area outside the bedroom(s). The carbon monoxide detector shall comply with NFPA 720 (2005 Edition).

2. Acarbon monoxide detector shall be located in the room that houses the appliance or equipment and shall:

a. Be powered by the same electrical circuit as the

appliance or equipment such that only one service switch services both the appliance and the carbon

monoxide detector; b. Have battery back-up power; c. Meet ANSI/UL2034 Standards and comply with

NFPA 720 (2005 Edition);and d. Have been approved and listed by a Nationally

Recognized Testing Laboratory as recognized under

527 CMR.

instructions shall remain with the appliance or equipment at the completion of the installation.

4. Ametal or plastic identification plate shall be mounted at the exterior of the building, four feet directly above the location of vent terminal. The plate shall be of sufficient size to be easily read from a distance of eight feet away, and read “Gas Vent Directly Below”.

(b) For direct-vent appliances, mechanical-vent heating appliances or domestic hot water equipment where the bottom of the vent terminal and the air intake is installed above four feet above grade the following requirements must be satisfied:

2. Acarbon monoxide detector shall:

a. Be located in the room that houses the appliance or

equipment;

b. Be either hard-wired or battery powered or both; and

c. Shall comply with NFPA 720 (2005 Edition).

3. AProduct-approved vent terminal must be used, and if applicable, a Product-approved air intake must be used. Installation shall be in strict compliance with the manufacturer’s instructions. A copy of the installation instructions shall remain with the appliance or equipment at the completion of the installation.

Important Instructions for the Commonwealth of Massachusetts

Rheem Direct Vent Gas Tankless Water Heater Use And Care Manual

Specifications and Main Features

Frequently Asked Questions

User Manual