Rheem PH-25RDVS, ECO-180DV, RUTG-66DV, RTG-66DV, RMTG-66DV User Manual

Use & Care Manual

CERTI FIED

With Installation Instructions for the Installer

Direct Vent Gas

Tankless Water Heater

Warning: This water heater is not suitable

for use in manufactured (mobile) homes!

Paloma PH-25RDVS (N,P)

Rheem/ Ecosense RTG-66DV (N,P) ECO-180DV (N,P)

Ruud RUTG-66DV (N,P)

Richmond RMTG-66DV (N,P)

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.

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!

gas supplier’s instructions.

— 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.

● 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.

— 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

— 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.

Printed in Japan

31-92683-000

AP14558 (01/08)

Safety Information

Safety Precautions ....... 3–6

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

FOR YOUR RECORDS

Write the model and serial numbers here:

Installation Instructions

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

Inspect Shipment ...........8

Venting ............... 9-14

Water Connections .... 15, 16

Relief Valve ..............17

Gas Supply .............. 18

High Altitude .............18

Remote Control ....... 19, 20

Electrical Connection ......21

Typical Installation ........22

Pipe Insulation ............23

Installation Checklist .......24

Operating Instructions

Lighting Instructions ...... 25

Water Temperature .... 26, 27

Care and Cleaning

Maintenance ............. 28

Housekeeping ........ 28, 29

Vent Inspection ...........29

Burner Inspection ........ 29

Extended Shut-Down ......29

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.

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.

Draining ................ 30

Freeze Protection ..........30

Troubleshooting Tips

Before You Call

For Service ........... 31, 32

Customer Service

Parts List ................ 33

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

Qualified Installers Only!

Maximum Temperature

Adjustment .............. 34

Minumum Temperature

Adjustment .............. 35

High Altitude Adjustment ...35

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

These words mean:

DANGER

that will result in death or serious injury.

WARNING

could result in death or serious injury

and/or damage to property.

CAUTION

may result in minor or moderate

injury.

Notice:

specified procedure or maintain a specific condition.

An imminently hazardous situation

A potentially hazardous situation that

Attention is called to observe a

IMPORTANT SAFETY INFORMATION.

DANGER

FLAMMABLES

Flammable Vapors

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

1. which can come on at any time and

2. will ignite flammable vapors.

Vapors:

1. cannot be seen,

2. are heavier than air,

3. go a long way on the floor and

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

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

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

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

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.

DANGER!

INSTALL AND PROPERLY VENT THE WATER HEATER…

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.

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 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.

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IMPORTANT SAFETY INFORMATION

°F

PRIORITY

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

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 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.

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

Notice:

Display shows °F only.

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 26 & 27 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 85°F (29°C) and above 120°F (49°C) can be achieved with the MAIN (UMC-117) remote control. Temperatures of 85°F (29°C) can be achieved with the Bath (USC-117 or USC2-117) remote control. Only qualified service personnel should perform this adjustment. Only factory authorized remote control(s) should be used.

* Temperatures 85°F(29°C) and above 120°F (49°C)

can be achieved with the Main (UMC-117) remote control. See page 34 & 35 for minimum and maximum temperature adjustment.

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!

NATURAL GAS AND LIQUEFIED PETROLEUM MODELS

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.

● 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.

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.

● 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.

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.

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

1” (2.5 cm) min

1” (2.5 cm)

min

1” (2.5 cm)

min

Coaxial Vent Pipe & Air Intake

Installing the water heater :

min. 1/2 "

min.

1/2 "

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

min. 1"

(1.3 cm)

(2.5 cm)(2.5 cm)

(30 cm)

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

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)

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

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 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.

Installing the water heater:

Manual Appliance

Gas Shut-off Valve

Wood Screw x 5pcs.

Wa sher x 4 pcs.

Use & Care Manual

Tankless Unit

FOR YOUR SAFETY!

—Do not store oruse gasoline or other

flammable vapors orliquids orother combustible materials in the vicinity of this or any otherappliance. To do so may result in an explosion orfire.

—WHAT TO DO IFYOU SMELLGAS

�Do not try to light any appliance.

� Do not touch any electrical switch; do not

use any phone in yourbuilding.

� Immediately call yourgas supplierfrom a

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

� If you cannot reach yourgas supplier, call

the fire department.

� Do not return to yourhome until authorized

by the gas supplierorfire department.

— Improperinstallation, adjustment,

alteration, service ormaintenance can cause property damage, personal injury, ordeath . Referto this manual. Installation and service must be performed by a qualified installer, service agency orthe gas supplier.

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

The purpose of this manual is twofold: one, to provide the installerwith the basic directions and recommendations forthe properinstallation and adjustment of the water heater; 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 water heater read 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, refer to 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.

Use & Care Manual

With Installation Instruc tions for the Installer

Printed in USA

Water Heaters

Residential Gas

Warning: This waterheateris not suitable for

use in manufactured (mobile) homes!

Tankless

°F

PRIORITY

POWER

ON/OFF

Remote Control

Assembly Kit

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50/30

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Drain Tubing

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

Corrosive Atmospheres

The air in beauty shops, dry cleaning establishments, photo processing labs, and storage areas for liquid and powdered bleaches or swimming pool chemicals often contains 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 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 heater is due to operation in a corrosive atmosphere.

Inspect Shipment

Inspect the water heater for possible damage. Check the markings on the rating plate of the water heater to be certain the type of gas supplied corresponds to the water heater requirements. Verify all included parts are present (see below).

The water heater must be installed with a 3”/5” diameter UL approved Category III Coaxial Stainless Steel

NO!

YES!

Vent Seam

downward slope

7/8" per foot

Ceiling

Vent Pipe

Wall Plates

Board

Inspection

Fire Stop

Access Panel #1

Inspection

Access

Panel #2

2’ (61 cm) Max.

94° Elbow

appliance coaxial vent pipe and an appropriate adapter.

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”/5” UL approved Category III Stainless Steel vent material only. No other vent material is permitted.

WARNING: Refer to page 7 for clearances to combustible material.

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. (Refer to pages 13 and 14 for an example of the concentric vent.)

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 pre-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.

See the back page of this manual for additional requirements for the Commonwealth of Massachusetts.

Number

of 90°

elbows

(bends)

1 26’

2 24' 6"’

3 23"

4 21' 6"

Maximum

Length of

Straight

Pipe

(8.0 m)

(7.5 m)

(7.0 m)

(6.5 m)

Venting Lengths

MAXIMUM VENT LENGTH: The

system will not operate if there is excessive restriction (pressure drop) in the venting system. A maximum 26’ may be used provided there is only one 90° elbow in the system. If additional elbows are required: two elbows can be used with 24’ 6"

(7.5 m)

, three elbows can be used with

(7.0 m)

or four elbows can be used with 21

(6.5 m) of vent pipe.

A 90° elbow is equivalent to 1’6” (.5 m) of straight pipe. A 45° elbow is equivalent to 9” (.25 m) of straight pipe.

The vent termination does not count as straight pipe when determining total vent lengths.

The 94° elbow is equivalent to a 90° elbow.

The vent should be installed with a slight downward slope of 7/8” per foot of horizontal run toward the vent terminal (see diagram below). This ensures that any

(8.0 m)

of vent pipe

23’

’

condensate formed during operation of the unit is evacuated from the appliance and to prevent rain from entering the appliance.

An upward slope toward the vent terminal is not acceptable for horizontal venting.

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 94° elbow is included in the installation and the wall plates are installed.

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

Installing the water heater:

downward slope

7/8" per foot

Ceiling

Vent Pipe

Wall Plates

Board

Inspection

Fire Stop

Access Panel #1

Inspection

Access

Panel #2

2’ (61 cm) Max.

94° Elbow

Appliance Vent Adapter

Water Heater

Exhaust

Flow

Collar

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” 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).

(15 cm)

when

CAUTION: Ensure that

the appliance vent adapter is securely attached to the water heater collar.

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

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.

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.

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 13 and 14 for DOWNWARD and UPWARD slope for horizontally vented water heaters.

● 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.

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

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

FIXED CLOSED

ERA

FIXE

CLOSED

VENT TERMINAL

AIR SUPPLY INLET

AREA WHERE TERMINAL IS NOT PERMITTED

Horizontal Vent Terminal Location

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

Canadian Installations

US Installations

A= Clearance above grade, veranda,

porch, deck or balcony.

B= Clearance to window or door that

may be opened.

C= Clearance to permanently closed

window.

12 inches (30 cm) above anticipated

snow level.

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).

* *

12 inches (30 cm) above anticipated

snow level.

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).

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.

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

I = Clearance to service regulator

coaxial vent outlet.

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

K = Clearance to mechanical air supply

inlet.

L = Clearance above paved sidewalk or

paved driveway located on public property.

M = Clearance under veranda, porch,

deck or balcony.

1 In accordance with current CSA-B149.1 Installation Codes. 2 In accordance with current ANSI Z223.1/ NFPA 54 National Fuel Gas Code. † A vent shall not terminate directly above a sidewalk or paved driveway that is located between two single family dwellings and serves both dwellings. * For clearances not specified in ANSI 223.1/NFPA 54 or CSA-B149.12, one of the following shall be indicated: a) A minmum clearance value determined by testing in accordance with section 2.20, or; b) A reference to the following footnote: "Clearance in accordance with local installtion codes and the require ments of the gas supplier."

* *

assembly.

3 feet (91 cm) *

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)

(30kW).

6 feet (1.83 m)

7 feet (2.13 m)† *

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

3 feet (91 cm) above if within 10 feet

(3 m) horizontally.

Not Allowed Not Allowed

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