Enviro 6G50 76N Series Residential Gas Water Heaters

Product Information

This is a residential gas water heater with power vented gas models and hot surface ignition. The model is 6G50 76N series 110 Canadian manual. It has low lead content and an odorant is added to the gas used by this water heater. The manual provides important safety instructions and information on approvals.

Product Usage Instructions

Installation, Use, and Service:
Ensure safe installation, use, and service of the water heater by following the instructions provided in the manual. For any technical or warranty questions, contact the local dealer from whom the water heater was purchased. If unsuccessful, write to the company listed on the rating plate on the water heater.

Safety Alerts:
Pay attention to safety alert symbols and messages throughout the manual. The symbols indicate potential personal injury hazards. Obey all safety messages to avoid possible injury or death.

General Safety Information

Follow these general safety guidelines:

Fire Hazard:
To protect against the risk of fire, ensure proper installation, use, and service. Do not expose the water heater to flooding or water damage. If using closed water systems, refer to the manual for installation and service instructions.

Breathing Hazard – Carbon Monoxide Gas:
Avoid breathing carbon monoxide gas by keeping the water heater away from areas exposed to flooding or water damage. Install a high altitude orifice if operating above 10,100 feet (3,079 m). Do not cover the water heater with an insulating jacket. Keep combustible materials away from the water heater.

Drain Line:
Ensure the drain line is properly installed. It should not be crimped closed and must allow free flow to an appropriate drain. Make sure condensate lines do not allow backflow and are connected to an appropriate drain.

Venting:
Follow the vent pipe assembly instructions provided in the manual. Venting should be done properly to avoid any hazards.

Table of Contents

Refer to the table of contents for easy navigation through the manual. It includes sections on safe installation, filling the water heater, approvals, general safety information, vent pipe assembly, and venting.

Instruction Manual

RESIDENTIAL GAS WATER HEATERS
POWER VENTED GAS MODELS W/HOT SURFACE IGNITION
MODEL 6G50 76N SERIES 110 CANADIAN MANUAL
LOW LEAD CONTENT

· For Your Safety ·
AN ODORANT IS ADDED TO THE GAS USED
BY THIS WATER HEATER.

ALL TECHNICAL AND WARRANTY QUESTIONS: SHOULD BE DIRECTED TO THE LOCAL DEALER FROM WHOM THE WATER HEATER WAS PURCHASED. IF YOU ARE UNSUCCESSFUL, PLEASE WRITE TO THE COMPANY LISTED ON THE RATING PLATE ON THE WATER HEATER.

PRINTED 1016

KEEP THIS MANUAL IN THE POCKET ON HEATER FOR FUTURE REFERENCE WHENEVER MAINTENANCE ADJUSTMENT OR SERVICE IS REQUIRED.
1

100276705

SAFE INSTALLATION, USE AND SERVICE
The proper installation, use and servicing of this water heater is extremely important to your safety and the safety of others. Many safety-related messages and instructions have been provided in this manual and on your own water heater to warn you and others of a potential injury hazard. Read and obey all safety messages and instructions throughout this manual. It is very important that the meaning of each safety message is understood by you and others who install, use, or service this water heater.

This is the safety alert symbol. It is used to alert you to potential personal injury hazards. Obey all safety messages that follow this symbol to avoid possible injury or death.

DANGER WARNING CAUTION CAUTION

DANGER indicates an imminently hazardous situation which, if not avoided, will result in injury or death.
WARNING indicates a potentially hazardous situation which, if not avoided, could result in injury or death.
CAUTION indicates a potentially hazardous situation which, if not avoided, could result in minor or moderate injury.
CAUTION used without the safety alert symbol indicates a potentially hazardous situation which, if not avoided, could result in property damage.

All safety messages will generally tell you about the type of hazard, what can happen if you do not follow the safety message, and how to avoid the risk of injury.

IMPORTANT DEFINITIONS
· Gas Supplier: The Natural Gas or Propane Utility or service who supplies gas for utilization by the gas burning appliances within this application. The gas supplier typically has responsibility for the inspection and code approval of gas piping up to and including the Natural Gas meter or Propane storage tank of a building. Many gas suppliers also offer service and inspection of appliances within the building.

APPROVALS

LOW LEAD CONTENT
2

GENERAL SAFETY INFORMATION
Fire Hazard
For continued protection against risk of fire:
· Do not install water heater on carpeted floor.
· Do not operate water heater if any part has been exposed to flooding or water damage.
3

GENERAL SAFETY INFORMATION

CAUTION
Improper installation, use and service may result in property damage.

• Do not operate water heater if any part has been exposed to flooding or water damage.
• Inspect anode rods regularly, replace if damaged.
• Install in location with drainage.
• Fill tank with water before operation.
• Properly sized thermal expansion tanks are required on all closed water systems. Refer to this manual for installation and service.

Breathing Hazard – Carbon Monoxide Gas

• Install vent system in accordance with codes. · Do not operate water heater if any part has been exposed to flooding or water damage.
• High altitude models should be installed at elevations above 5,300 feet (1,615 m). For operation above 10,100 feet (3,079 m), a high altitude orifice must be installed.
• Do not operate if soot buildup is present. · Do not obstruct water heater air intake with insulating jacket.
• Do not place chemical vapor emitting products near water heater.
• Gas and carbon monoxide detectors are available.
• No vent damper installation is compatible with this power vented water heater.
• Do NOT elevate any portion of the field supplied drain line beyond the 1/2″ adaptor above the adaptor.
• This must be true for the entire length of the drain line including the exit into an appropriate drain.
• Condensate lines must be free and clear of debris and must not allow back flow through the hose. The condensate lines must be able to flow freely to an appropriate drain.
• Do not allow condensate lines to become crimped closed.
• Analyze the entire vent system to make sure that condensate will not become trapped in a section of vent pipe and therefore reduce the open cross sectional area of the vent.
• Breathing carbon monoxide can cause brain damage or death. Always read and understand instruction manual.

at least 18″(45.7cm) above the floor. This will reduce, but not eliminate, the risk

INTRODUCTION

Thank You for purchasing this water heater. Properly installed and maintained, it should give you years of trouble free service.
Abbreviations Found In This Instruction Manual: · CSA – Canadian Standards Association · ANSI – American National Standards Institute · ASME – American Society of Mechanical Engineers · AHRI – Air Conditioning, Heating and Refrigeration Institute · UL – Underwriters Laboratories Inc.
This gas-fired water heater is design certified by Underwriters Laboratories Inc. under American National Standard/CSA Standard for Gas Water Heaters ANSI Z21.10.3 · CSA 4.3 (current edition).

QUALIFIED INSTALLER OR SERVICE AGENCY
Installation and service of this water heater requires ability equivalent to that of a Qualied Agency (as dened by ANSI below) in the eld involved. Installation skills such as plumbing, air supply, venting, gas supply and electrical supply are required in addition to electrical testing skills when performing service.
ANSI Z223.1 2006 Sec. 3.3.83: “Qualified Agency” – “Any individual, rm, corporation or company that either in person or through a representative is engaged in and is responsible for (a) the installation, testing or replacement of gas piping or (b) the connection, installation, testing, repair or servicing of appliances and equipment; that is experienced in such work; that is familiar with all precautions required; and that has complied with all the requirements of the authority having jurisdiction.”
If you are not qualied (as dened by ANSI above) and licensed or certied as required by authority having jurisdiction to perform a given task do not attempt to perform any of the procedures described in this manual. If you do not understand the instructions given in this manual do not attempt to perform any procedures outlined in this manual.

PREPARING FOR THE INSTALLATION
1. Read “General Safety Information” section, page 3 and 4 of this manual rst and then entire manual carefully. If you don’t follow safety rules, the water heater will not operate properly. It could cause DEATH, SERIOUS BODILY INJURY AND/OR PROPERTY DAMAGE.
This manual contains instructions for installation, operation, and maintenance of the gas-red water heater. It also contains warnings throughout the manual that you must read and be aware of. All warnings and all instructions are essential to proper operation of the water heater and your safety. Since we cannot put everything on the rst few pages, READ ENTIRE MANUAL BEFORE ATTEMPTING TO INSTALL OR OPERATE THE WATER HEATER.
2. The installation must conform with these instructions and local code authority having jurisdiction. In absence of local codes, installation must comply with current editions of CAN/CSA-B149.1, the Natural Gas and Propane Installation Code and CSA C22.1, Canadian Electrical Code. All documents are available from Canadian Standards Association, 8501 East Pleasant Valley Road, Cleveland, OH 44131.
3. The water heater when installed must be grounded in accordance with the local codes, or in the absence of local codes: the Canadian Electrical Code (C22.1).
4. If after reading this manual you have any questions or do not understand any portion of the instructions, call the local gas utility or the manufacturer whose name appears on the rating plate.
5. Carefully plan the place where you are going to put the water heater. Correct combustion, vent action, and vent pipe installation are very important in preventing death from possible carbon monoxide poisoning and res, see Figures 1 and 2.
Examine the location to ensure the water heater complies with the “Locating the New Water Heater” section in this manual.

6

TYPICAL INSTALLATION

GET TO KNOW YOUR WATER HEATER – GAS MODELS

A Vent Pipe B Anode C Hot Water Outlet D Outlet (120 VAC) F Gas Supply G Main Manual Gas Shut Off Valve H Ground Joint Union J Sediment Trap K Outer Door L Union M Inlet Water Shut Off Valve N Cold Water Inlet O Inlet Dip Tube P Temperature & Pressure
Relief Valve

Q Rating Plate R Insulation S Vent Terminal T Drain Valve U Igniter And Main Burner W Drain Pan X Gas Control Valve/Tstat Y Control Harness* A A Motor & Blower CC Condensate Fitting
(4 Places Shown)** DD Plastic Top EE On/Off Switch FF Exhaust Tee GG E lbow

H H Bushing II Nipple
J J Condensate Tee K K Adapter LL Plug MM Vent Pipe Assembly #1 N N Vent Pipe Assembly #2 OO Vent Pipe Assembly #3 PP Side Recirculation Loop
Inlet QQ Side Recirculation Loop
Outlet (not shown) RR Vent Sound Silencer
(Optional) SS Access Door

S RR
L

REPLACEMENT PARTS AND DELIMING PRODUCTS
Replacement parts and recommended delimer may be ordered through authorized servicers or distributors. When ordering parts, provide complete model and serial numbers (see rating plate), quantity and name of part desired. Standard hardware items may be purchased locally.
CONDENSATE ASSEMBLY

SS (SEE ACCESS PANEL CAUTION)
W

PP
(U) NATURAL GAS MAIN BURNER WITH IGNITER ASSEMBLY SIDE VIEW

6 (15 cm) MAXIMUM AIR GAP

TO A SUITABLE DRAIN

VACUUM RELIEF VALVE

(X) TEMPERATURE INDICATORS

*INSTALL PER LOCAL CODES

• CAUTION HARNESS HAS 120 VAC. IN OPERATION.

** See “PLANNING THE VENT SYSTEM”, “CONDENSATE” and “BLOWER ASSEMBLY INSTALLATION” for more

information.

***The side recirculation loop connections may not be used as the primary water inlet and outlet connections.

For your convenience, plugs are installed in these ttings at the factory. Remove these plugs if needed for

your specic installation. Otherwise (as with all connections) check for leaks while lling the tank with water

and after completing the installation.

FIGURE 1.

7

TEMPERATURE ADJUSTMENT BUTTONS

TYPICAL INSTALLATION
CONDENSATE HOSE AND DRAIN PAN
FIGURE 1 (continued). 8

TYPICAL INSTALLATION
MIXING VALVE / THERMAL EXPANSION TANK USAGE AND SPACE HEATING

MIXING VALVES
DANGER

FIGURE 2.

Water temperature over 125°F (52°C) can cause severe burns instantly resulting in severe injury or death.
Children, the elderly and the physically or mentally disabled are at highest risk for scald injury.
Feel water before bathing or showering.
Temperature limiting devices such as mixing valves must be installed when required by codes and to ensure safe temperatures at fixtures.

Mixing valves are available at plumbing supply stores. Consult a
Qualied Installer or Service Agency. Follow mixing valve manufacturer’s instructions for installation of the valves.

TABLE 1.

Water Temperature °F

Time for 1st Degree Burns (Less Severe Burns)

Time for Permanent Burns 2nd & 3rd Degree
(Most Severe Burns)

110

(normal shower temp.)

116

(pain threshold)

116

35 minutes

45 minutes

122

1 minute

5 minutes

131

5 seconds

25 seconds

140

2 seconds

5 seconds

149

1 second

2 seconds

154

instantaneous

1 seconds

(U.S. Government Memorandum, C.P.S.C., Peter L. Armstrong, Sept. 15, 1978)

Water heated to a temperature which will satisfy clothes washing, dish washing, and other sanitizing needs can scald and cause permanent injury upon contact. Short repeated heating cycles caused by small hot water uses can cause temperatures at the point of use to exceed the water heater’s temperature setting by up to 20°F (11°C).
Some people are more likely to be permanently injured by hot water than others. These include the elderly, children, the inrm and the physically/mentally disabled. Table 1 shows the approximate timeto-burn relationship for normal adult skin. If anyone using hot water provided by the water heater being installed ts into one of these groups or if there is a local code or state law requiring a certain water temperature at the point of use, then special precautions must be taken.
In addition to using lowest possible temperature setting that satises demand of application a Mixing Valve should be installed at water heater (see Figure 3) or at hot water taps to further reduce system water temperature.
9

HOT WATER OUTLET

TEMPERED WATER OUTLET

12″ TO 15″ (30-38 cm)

COLD WATER INLET

CHECK VALVE MIXING CHECK VALVE VALVE
TO TANK INLET
FIGURE 3.

LOCATING THE NEW WATER HEATER
FACTS TO CONSIDER ABOUT THE LOCATION
Carefully choose an indoor location for the new water heater, because the placement is a very important consideration for the safety of the occupants in the building and for the most economical use of the appliance. This water heater is not for use in manufactured (mobile) homes or outdoor installation.
Whether replacing an old water heater or putting the water heater in a new location, the following critical points must be observed: 1. Select a location indoors as close as practical to the vent terminal
or location to which the water heater vent piping is going to be connected, and as centralized with the water piping system as possible. 2. Selected location must provide adequate clearances for servicing and proper operation of the water heater.

Installation of the water heater must be accomplished in such a manner that if the tank or any connections should leak, the ow will not cause damage to the structure. For this reason, it is not advisable to install the water heater in an attic or upper oor. When such locations cannot be avoided, a suitable drain pan should be installed under the water heater. Drain pans are available at your
local hardware store. Such a drain pan must have a clearance of
at least 1.0″ (2.5cm) greater than any point on the water heater’s outer jacket and must be piped to an adequate drain. The pan must
not restrict combustion air ow. For example, if a circular pan is used, it must be a minimum of 27″ (69cm) in diameter. See Figure 1.

Water heater life depends upon water quality, water pressure and the environment in which the water heater is installed. Water heaters are sometimes installed in locations where leakage may result in property damage, even with the use of a drain pan piped to a drain. However, unanticipated damage can be reduced or prevented by a leak detector or water shut-off device used in conjunction with a piped drain pan. These devices are available from some plumbing supply wholesalers and retailers, and detect and react to leakage in various ways:

· Sensors mounted in the drain pan that trigger an alarm or turn off the incoming water to the water heater when leakage is detected.

· Sensors mounted in the drain pan that turn off the water supply to the entire building when water is detected in the drain pan.

· Water supply shut-off devices that activate based on the water pressure differential between the cold water and hot water pipes connected to the water heater.

· Devices that will turn off the gas supply to a gas water heater while at the same time shutting off its water supply.
INSTALLATIONS IN AREAS WHERE FLAMMABLE LIQUIDS (VAPORS) ARE LIKELY TO BE PRESENT OR STORED (GARAGES, STORAGE AND UTILITY AREAS, ETC.): Flammable liquids (such as gasoline, solvents, propane (LP or butane, etc.) and other substances (such as adhesives, etc.) emit ammable vapors which can be ignited by a gas water heater’s hot surface igniter or main burner. The resulting ashback and re can cause death or serious burns to anyone in the area.
Also, the water heater must be located and/or protected so it is not subject to physical damage by a moving vehicle.

Fire Hazard
For continued protection against risk of fire:
· Do not install water heater on carpeted floor.
· Do not operate water heater if any part has been exposed to flooding or water damage.
This water heater must not be installed directly on carpeting. Carpeting must be protected by metal or wood panel beneath the appliance extending beyond the full width and depth of the appliance by at least 3″ (7.6 cm) in any direction, or if the appliance is installed

10

in an alcove or closet, the entire oor must be covered by the panel. Failure to heed this warning may result in a re hazard.
Minimum clearances between water heater and combustible construction are 0 inch at the sides and rear, 5.5″ (14.0 cm) from the front and 12″ (30.5 cm) from top. (Standard clearance.) If clearances stated on the heater differ from standard clearances, install water heater according to clearances stated on the heater. Adequate clearance 24″ (61.0 cm) for servicing this appliance should be considered before installation, such as changing the anodes, etc. A minimum clearance of 5.5″ (14.0 cm) must be allowed for access to replaceable parts such as thermostats, drain valve, relief valve and condensate drain. When installing the heater, consideration must be given to proper location. Location selected should be as close to the wall as practicable and as centralized with the water piping system as possible.

If this water heater will be used in beauty shops, barber shops, cleaning establishments, or self-service laundries with dry cleaning equipment, it is imperative that the water heater or water heaters be installed so that combustion and ventilation air be taken from outside these areas.
Propellants of aerosol sprays and volatile compounds, (cleaners, chlorine based chemicals, refrigerants, etc.) in addition to being highly ammable in many cases, will also react to form corrosive hydrochloric acid when exposed to the combustion products of the water heater. The results can be hazardous, and also cause product failure.

INSULATION BLANKETS

Insulation blankets are available to the general public for external use on gas water heaters but are not necessary with these products. The purpose of an insulation blanket is to reduce standby heat loss encountered with storage tank heaters. Your water heater meets or exceeds the Energy Policy Act standards with respect to insulation and standby loss requirements, making an insulation blanket unnecessary.
Should you choose to apply an insulation blanket to this heater, you should follow these instructions (For identication of components mentioned below, see Figure 1). Failure to follow these instructions can restrict the air ow required for proper combustion, potentially resulting in re, asphyxiation, serious personal injury or death.

FIGURE 4.
A gas water heater cannot operate properly without the correct amount of air for combustion. Do not install in a conned area such as a closet, unless you provide air as shown in the “Locating The New Water Heater” section. Never obstruct the ow of ventilation air. If you have any doubts or questions at all, call your gas supplier. Failure to provide the proper amount of combustion air can result in a re or explosion and cause death, serious bodily injury, or property damage.

· Do not apply insulation to the top of the water heater, as this will interfere with safe operation of the blower assembly.
· Do not cover the outer door, thermostat or temperature & pressure relief valve.
· Do not allow insulation to come within 2″ (5.1 cm) of the oor to prevent blockage of combustion air ow to the burner.
· Do not cover the instruction manual. Keep it on the side of the water heater or nearby for future reference.
· Do obtain new warning and instruction labels from the manufacturer for placement on the blanket directly over the existing labels.
· Do inspect the insulation blanket frequently to make certain it does not sag, thereby obstructing combustion air ow.
AIR REQUIREMENTS

FIGURE 5.

For safe operation an adequate supply of fresh uncontaminated air for combustion and ventilation must be provided.
An insufficient supply of air can cause recirculation of combustion products resulting in contamination that may be hazardous to life.
11

Such a condition often will result in a yellow, luminous burner flame, causing sooting of the combustion chamber, burners and flue tubes and creates a risk of asphyxiation.
Do not install the water heater in a conned space unless an adequate supply of air for combustion and ventilation is brought in to that space using the methods described in the Conned Space section that follows.
Never obstruct the ow of ventilation air. If you have any doubts or questions at all, call your gas supplier. Failure to provide the proper amount of combustion air can result in a re or explosion and cause property damage, serious bodily injury or death.
UNCONFINED SPACE
An Unconned Space is one whose volume is not less than 50 cubic feet per 1,000 Btu/hr (4.8 cubic meters per kW) of the total input rating of all appliances installed in the space. Rooms communicating directly with the space, in which the appliances are installed, through openings not furnished with doors, are considered a part of the unconned space.
Makeup air requirements for the operation of exhaust fans, kitchen ventilation systems, clothes dryers and replaces should also be considered in determining the adequacy of a space to provide combustion, ventilation and dilution air.

free area and metal louvers and grilles will have 75% free area. Non motorized louvers and grilles should be xed in the open position.
FRESH AIR OPENINGS FOR CONFINED SPACES
The following instructions should be used to calculate the size, number and placement of openings providing fresh air for combustion, ventilation and dilution in conned spaces. The illustrations shown in this section of the manual are a reference for the openings that provide fresh air into conned spaces only. Do not refer to these illustrations for the purpose of vent installation. See Installation of Vent System on pages 18-25 for complete venting installation instructions.
OUTDOOR AIR THROUGH TWO OPENINGS

UNUSUALLY TIGHT CONSTRUCTION
In unconned spaces in buildings, inltration may be adequate to provide air for combustion, ventilation and dilution of ue gases. However, in buildings of unusually tight construction (for example, weather stripping, heavily insulated, caulked, vapor barrier, etc.) additional air must be provided using the methods described in the Conned Space section that follows.

CONFINED SPACE
A Conned Space is one whose volume is less than 50 cubic feet per 1,000 Btu/hr (4.8 cubic meters per kW) of the total input rating of all appliances installed in the space.
Openings must be installed to provide fresh air for combustion, ventilation and dilution in conned spaces. The required size for the openings is dependent on the method used to provide fresh air to the conned space and the total Btu/hr input rating of all appliances installed in the space.
DIRECT VENT APPLIANCES
Appliances installed in a Direct Vent conguration that derive all air for combustion from the outdoor atmosphere through sealed intake air piping are not factored in the total appliance input Btu/hr calculations used to determine the size of openings providing fresh air into conned spaces.

FIGURE 6.
The confined space should be provided with two permanent openings, one commencing within 12 inches (300 mm) of the top and one commencing within 12 inches (300 mm) of the bottom of the enclosure. The openings should communicate directly with the outdoors. See Figure 6.
Each opening should have a minimum free area of 1 square inch per 4,000 Btu/hr (550 mm2 per kW) of the aggregate input rating of all appliances installed in the enclosure. Each opening should not be less than 100 square inches (645 cm2).
OUTDOOR AIR THROUGH ONE OPENING

EXHAUST FANS
Where exhaust fans are installed, additional air should be provided to replace the exhausted air. When an exhaust fan is installed in the same space with a water heater, sufcient openings to provide fresh air must be provided that accommodate the requirements for all appliances in the room and the exhaust fan. Undersized openings will cause air to be drawn into the room through the water heater’s vent system causing poor combustion. Sooting, serious damage to the water heater and the risk of re or explosion may result. It can also create a risk of asphyxiation.

LOUVERS AND GRILLES

The free areas of fresh air openings in instructions that follow do not take in to account presence of louvers, grilles or screens in openings.

The required size of openings for combustion, ventilation and dilution air should be based on the “net free area” of each opening. Where the free area through a design of louver or grille or screen is known, it should be used in calculating the size of opening required to provide the free area specied. Where the louver and grille design and free area are not known, it should be assumed that wood louvers will have 25%

FIGURE 7.
Alternatively a single permanent opening, commencing within 12 inches (300 mm) of the top of the enclosure, should be provided. See

12

Figure 7. The water heater should have clearances of at least 1 inch (25 mm) from the sides and back and 6 inches (150 mm) from the front of the appliance. The opening should directly communicate with the outdoors or should communicate through a vertical or horizontal duct to the outdoors or spaces that freely communicate with the outdoors and should have a minimum free area of the following:
1. 1 square inch per 3000 Btu/hr (700 mm2 per kW) of the total input rating of all appliances located in the enclosure, and
2. Not less than the sum of the areas of all vent connectors in space.
OUTDOOR AIR THROUGH TWO HORIZONTAL DUCTS

The conned space should be provided with two permanent vertical ducts, one commencing within 12 inches (300 mm) of the top and one commencing within 12 inches (300 mm) of the bottom of the enclosure. The vertical ducts should communicate directly with the outdoors. See Figure 9.
Each duct opening should have a minimum free area of 1 square inch per 4,000 Btu/hr (550 mm2 per kW) of the aggregate input rating of all appliances installed in the enclosure.
When ducts are used, they should be of the same cross sectional area as the free area of the openings to which they connect. The minimum dimension of rectangular air ducts should be not less than 3 inches.

AIR FROM OTHER INDOOR SPACES

FIGURE 8.
Conned space should be provided with two permanent horizontal ducts, one commencing within 12 inches (300 mm) of top and one commencing within 12 inches (300 mm) of bottom of enclosure. Horizontal ducts should communicate directly with outdoors. See Figure 8.
Each duct opening should have a minimum free area of 1 square inch per 2,000 Btu/hr (1100 mm2 per kW) of the aggregate input rating of all appliances installed in the enclosure.
When ducts are used, they should be of the same cross sectional area as the free area of the openings to which they connect. The minimum dimension of rectangular air ducts should be not less than 3 inches.
OUTDOOR AIR THROUGH TWO VERTICAL DUCTS
The illustrations shown in this section of the manual are a reference for the openings that provide fresh air into conned spaces only.
Do not refer to these illustrations for the purpose of vent installation. See Installation of Vent System on pages 19-20 for complete venting installation instructions.

FIGURE 9A.
The confined space should be provided with two permanent openings, one commencing within 12 inches (300 mm) of the top and one commencing within 12 inches (300 mm) of the bottom of the enclosure. See Figure 9A.
Each opening should communicate directly with an additional room(s) of sufcient volume so that the combined volume of all spaces meets the criteria for an Unconned Space.
Each opening should have a minimum free area of 1 square inch per 1,000 Btu/hr (1100 mm2 per kW) of the aggregate input rating of all appliances installed in the enclosure. Each opening should not be less than 100 square inches (645 cm2).

FIGURE 9. 13

INSTALLING THE NEW WATER HEATER

CHEMICAL VAPOR CORROSION
CORROSION OF THE FLUEWAYS AND VENT SYSTEM MAY OCCUR IF AIR FOR COMBUSTION CONTAINS CERTAIN CHEMICAL VAPORS. SUCH CORROSION MAY RESULT IN FAILURE AND RISK OF ASPHYXIATION.
Spray can propellants, cleaning solvents, refrigerator and air conditioning refrigerants, swimming pool chemicals, calcium and sodium chloride (water softener salt), waxes, and process chemicals are typical compounds which are potentially corrosive.
Do not store products of this sort near the heater. Also, air which is brought in contact with the heater should not contain any of these chemicals. If necessary, uncontaminated air should be obtained from remote or outside sources. The limited warranty is voided when failure of water heater is due to a corrosive atmosphere. (See limited warranty for complete terms and conditions).
WATER PIPING

DANGER

Water temperature over 125°F (52°C) can cause severe burns instantly resulting in severe injury or death.
Children, the elderly and the physically or mentally disabled are at highest risk for scald injury.
Feel water before bathing or showering.
Temperature limiting valves are available.
Read instruction manual for safe temperature setting.

HOTTER WATER CAN SCALD: Water heaters are intended to produce hot water. Water heated to a temperature which will satisfy space heating, clothes washing, dish washing, cleaning and other sanitizing needs can scald and permanently injure you upon contact. Some people are more likely to be permanently injured by hot water than others. These include the elderly, children, the inrm, or physically/mentally handicapped. If anyone using hot water ts into one of these groups or if there is a local code or state law requiring a certain temperature water at the hot water tap, then you must take special precautions. In addition to using lowest possible temperature setting that satises your hot water needs, a means such as a mixing valve, should be used at hot water taps used by these people or at the water heater, see Figure 2. Valves for reducing point of use temperature by mixing cold and hot water are also available:
Consult a Qualied Installer or Service Agency. Follow manufacturer’s instructions for installation of valves. Before changing the factory setting on thermostat, read “Temperature Regulation” section in this manual.

This water heater should not be connected to any heating systems or component(s) used with a non-potable water heating appliance.
All piping components connected to this unit for space heating applications should be suitable for use with potable water.
Toxic chemicals, such as those used for boiler treatment should not be introduced into this system.
When the system requires water for space heating at temperatures higher than required for domestic water purposes, a mixing valve must be installed. Please refer to Figure 2 for suggested piping arrangement.
SPACE HEATING AND POTABLE WATER SYSTEM
This appliance has been design certied as complying with American National Standard/CSA Standard for water heaters and is considered suitable for Water (Potable) Heating and Space Heating.
Your water heater is equipped with inlet /outlet connections for use in space heating applications (see Figure 2). If this water heater is to be used to supply both space heating and potable (drinking) water, the instructions listed below must be followed:
· Be sure to follow the manual(s) shipped with the air handler or other type heating system.
· This water heater is not to be used as a replacement for an existing boiler installation.
· Do not use with piping that has been treated with chromates, boiler seal or other chemicals and do not add any chemicals to the water heater piping
· If the space heating system requires water temperatures in excess of 120°F (49°C), a mixing valve must be installed per the manufacturer’s instructions in the potable hot water supply to limit the risk of scald injury.
· Pumps, valves, piping and ttings must be compatible with potable water.
· A properly installed flow control valve is required to prevent thermosiphoning. Thermosiphoning is the result of a continuous ow of water through the air handler circuit during the off cycle. Weeping (blow off) of the temperature and pressure relief valve (T & P) or higher than normal water temperatures are the rst signs of thermosiphoning.
· The hot water line from the water heater should be vertical past any mixing valve or supply line to the heating system to remove air bubbles from the system.
· Do not connect the water heater to any system or components previously used with non-potable water heating appliances when used to supply potable water.

CLOSED WATER SYSTEMS
Water supply systems may, because of code requirements or such conditions as high line pressure, among others, have installed devices such as pressure reducing valves, check valves, and back ow preventers. Devices such as these cause the water system to be a closed system.

14

THERMAL EXPANSION
As water is heated, it expands (thermal expansion). In a closed system the volume of water will grow when it is heated. As the volume of water grows there will be a corresponding increase in water pressure due to thermal expansion. Thermal expansion can cause premature tank failure (leakage). This type of failure is not covered under the limited warranty. Thermal expansion can also cause intermittent Temperature-Pressure Relief Valve operation: water discharged from valve due to excessive pressure build up. This condition is not covered under the limited warranty. The Temperature-Pressure Relief Valve is not intended for constant relief of thermal expansion.
A properly sized thermal expansion tank must be installed on all closed systems to control the harmful effects of thermal expansion. Contact a local plumbing service agency to have a thermal expansion tank installed.
NOTE: To protect against untimely corrosion of hot and cold water ttings, it is strongly recommended that di-electric unions or couplings be installed on this water heater when connected to copper pipe.
All gas piping must comply with local codes and ordinances or with the Natural Gas and Propane Installation Code (CAN/CSA B149.1). Copper and brass tubing and ttings (except tin lined copper tubing) should not be used.

T & P Valve and Pipe Insulation 1. Locate the temperature and pressure relief valve on the water
heater (also known as a T&P relief valve). See Figure 11.
2. Locate the slit running the length of the T&P relief valve insulation.
3. Spread the slit open and t the insulation over the T&P relief valve. See Figure 11. Apply gentle pressure to the insulation to ensure that it is fully seated on the T&P Relief Valve. Once seated, secure the insulation with duct tape, electrical tape, or equivalent. IMPORTANT: The insulation and tape must not block the discharge opening or hinder access to the manual relief lever (Figure 11). Ensure a discharge pipe is installed into the T&P valve discharge opening per the instructions in this manual.
4. Locate the hot water (outlet) & cold water (inlet) pipes to the water heater.
5. Locate the slit running the length of a section of pipe insulation.
6. Spread the slit open and slip the insulation over the cold water (inlet) pipe. Apply gentle pressure along the length of the insulation to ensure that it is fully seated around the pipe. Also, ensure that the base of the insulation is ush with the water heater. Once seated, secure the insulation with duct tape, electrical tape, or equivalent.
7. Repeat steps 5 and 6 for the hot water (outlet) pipe.
8. Add additional sections of pipe insulation as needed.

FIGURE 11.
TEMPERATURE-PRESSURE RELIEF VALVE

Explosion Hazard
Temperature-Pressure Relief Valve must comply with ANSI Z21.22CSA 4.4 and ASME code.
Properly sized Temperature-Pressure Relief Valve must be installed in opening provided.
Can result in overheating and excessive tank pressure.
Can cause serious injury or death.

FIGURE 10.
Figure 10 shows typical attachment of water piping to the water heater. The water heater is equipped with 3/4 inch NPT water connections.

This water heater is provided with a properly rated/sized and certied combination Temperature-Pressure Relief Valve (T&P valve) by the manufacturer. The valve is certied by a nationally recognized testing laboratory that maintains periodic inspection of production of listed equipment of materials as meeting the requirements for Relief Valves for Hot Water Supply Systems, ANSI Z21.22 · CSA 4.4, and the code requirements of ASME.

NOTE: If using copper tubing, solder tubing to an adapter before attaching the adapter to the water heater connections. Do not solder the water lines directly to the water heater connections. It will harm the dip tube and damage the tank.

If replaced, the new T&P valve must meet the requirements of local codes, but not less than a combination Temperature-Pressure Relief Valve rated/sized and certied as indicated in the above paragraph. The new valve must be marked with a maximum set pressure not to

15

exceed the marked hydrostatic working pressure of the water heater (150 psi = 1,035 kPa) and a discharge capacity not less than the water heater Btu/hr or kW input rate as shown on the water heater’s model rating plate.
Note: In addition to the factory installed Temperature-Pressure Relief Valve on the water heater, each remote storage tank that may be installed and piped to a water heating appliance must also have its own properly sized, rated and approved TemperaturePressure Relief Valve installed. Call the toll free technical support phone number listed on the back cover of this manual for technical assistance in sizing a Temperature-Pressure Relief Valve for remote storage tanks.
For safe operation of the water heater, the Temperature-Pressure Relief Valve must not be removed from its designated opening nor plugged. The Temperature- Pressure Relief Valve must be installed directly into the tting of the water heater designed for the relief valve. Install discharge piping so that any discharge will exit the pipe within 6 inches (15.2 cm) above an adequate oor drain, or external to the building. In cold climates it is recommended that it be terminated at an adequate drain inside the building. Be certain that no contact is made with any live electrical part. The discharge opening must not be blocked or reduced in size under any circumstances. Excessive length, over 30 feet (9.14 m), or use of more than four elbows can cause restriction and reduce the discharge capacity of the valve.
No valve or other obstruction is to be placed between the Temperature-Pressure Relief Valve and the tank. Do not connect discharge piping directly to the drain unless a 6″ (15.2 cm) air gap is provided. To prevent bodily injury, hazard to life, or property damage, the relief valve must be allowed to discharge water in adequate quantities should circumstances demand. If the discharge pipe is not connected to a drain or other suitable means, the water ow may cause property damage.
CAUTION
Water Damage Hazard
· Temperature-Pressure Relief Valve discharge
pipe must terminate at adequate drain.

DANGER

· Burn hazard.
· Hot water discharge.
· Keep clear of Temperature-
Pressure Relief Valve discharge outlet.

The Temperature-Pressure Relief Valve must be manually operated at least twice a year. Caution should be taken to ensure that (1) no one is in front of or around the outlet of the TemperaturePressure Relief Valve discharge line, and (2) the water manually discharged will not cause any bodily injury or property damage because the water may be extremely hot. If after manually operating the valve, it fails to completely reset and continues to release water, immediately close the cold water inlet to the water heater, follow the draining instructions in this manual, and replace the Temperature-Pressure Relief Valve with a properly rated/sized new one.
NOTE: The purpose of a Temperature-Pressure Relief Valve is to prevent excessive temperatures and pressures in the storage tank. The T&P valve is not intended for the constant relief of thermal expansion. A properly sized thermal expansion tank must be installed on all closed systems to control thermal expansion, see Closed Water Systems and Thermal Expansion on page 14-15.
If you do not understand these instructions or have any questions regarding the Temperature-Pressure Relief Valve call the toll free number listed on the back cover of this manual for technical assistance.
HIGH ALTITUDE INSTALLATION

T&P Valve Discharge Pipe Requirements: · Should not be smaller in size than the outlet pipe size of the valve, or
have any reducing couplings or other restrictions.
· Should not be plugged or blocked.
· Should not be exposed to freezing temperatures.
· Should be of material listed for hot water distribution.
· Should be installed so as to allow complete drainage of both the Temperature-Pressure Relief Valve and the discharge pipe.
· Must terminate a maximum of six inches above a oor drain or external to the building. In cold climates, it is recommended that the discharge pipe be terminated at an adequate drain inside the building.
· Should not have any valve or other obstruction between the relief valve and the drain.

This heater is approved for operation up to 5,300 feet (1,615 m) without alteration. High altitude models are available from the factory for elevations between 5,300 feet (1,615 m) and 10,100 feet (3,079 m). For elevations above 10,100 feet (3,079 m) the input rating should be reduced at the rate of 4 percent for each 1,000 feet (305 m) above sea level which requires replacement of the burner orice. Contact your local gas supplier for further information.

16

Failure to replace standard orice with a high altitude orice when installed above 10,100 feet (3,079 m) could result in improper and inefcient operation of the appliance, producing carbon monoxide gas in excess of safe limits, which could result in serious injury or death. Contact your gas supplier for any specic changes which may be required in your area.
GAS PIPING

Fire and Explosion Hazard
Do not use water heater with any gas other than the gas shown on the rating plate.
Excessive pressure to gas control valve can cause serious injury or death
Turn off gas lines during installation.
Contact qualified installer or service agency.
Make sure the gas supplied is the same type listed on the model rating plate. The inlet gas pressure must not exceed 14 inch water column (3.5 kPa) for natural and propane gas (L.P.). The minimum inlet gas pressure shown on the rating plate is that which will permit ring at rated input.
All gas piping must comply with local codes and ordinances or with the Natural Gas and Propane Installation Code (CAN/CSA B149.1). Copper or brass tubing and ttings (except tin lined copper tubing) should not be used.
If the gas control valve is subjected to pressures exceeding 1/2 psi (3.5 kPa), the damage to the gas control valve could result in a re or explosion from leaking gas.
If the main gas line Shut-off serving all gas appliances is used, also turn “off” the gas at each appliance. Leave all gas appliances shut “off” until the water heater installation is complete.
A gas line of sufcient size must be run to the water heater. Consult the current edition of the Natural Gas and Propane Installation Code (CAN/CSA B149.1) and your gas supplier concerning pipe size.
There must be: · A readily accessible manual shut off valve in the gas supply line
serving the water heater, and
· A sediment trap ahead of gas control valve to help prevent dirt and foreign materials from entering the gas control valve.
· A exible gas connector or a ground joint union between the shut off valve and control valve to permit servicing of the unit.
Be sure to check all the gas piping for leaks before lighting the water heater. Use a soapy water solution, not a match or open ame. Rinse off soapy solution and wipe dry.

Use pipe joint compound or teon tape marked as being resistant to the action of petroleum [Propane (L.P.)] gases. The appliance and its gas connection must be leak tested before placing the appliance in operation. The appliance and its individual Shut-off valve should be disconnected from the gas supply piping system during any pressure testing of that system at test pressures in excess of 1/2 pound per square inch (3.5 kPa). It should be isolated from the gas supply piping system by closing its individual manual Shut-off valve during any pressure testing of the gas supply piping system at test pressures equal to or less than 1/2 pound per square inch (3.5 kPa). Connecting gas piping to the gas control valve of water heater can be accomplished by either of two methods shown in Figures 12 and 13.
FIGURE 12. GAS PIPING WITH FLEXIBLE CONNECTOR.
FIGURE 13. GAS PIPING WITH ALL BLACK IRON PIPE TO GAS CONTROL.

17

SEDIMENT TRAPS
A sediment trap should be installed as close to the inlet of the water heater as practical at the time of water heater installation. The sediment trap should be either a tee tting with a capped nipple in the bottom outlet or other device recognized as an effective sediment trap. If a tee tting is used, it should be installed in conformance with one of the methods of installation shown in Figures 12 and 13. Contaminants in the gas lines may cause improper operation of the gas control valve that may result in re or explosion. Before attaching the gas line be sure that all gas pipe is clean on the inside. To trap any dirt or foreign material in the gas supply line, a sediment trap must be incorporated in the piping. The sediment trap must be readily accessible. Install in accordance with the “Gas Piping” section. Refer to the current edition of the Natural Gas and Propane Installation Code (CAN/CSA B149.1).

Never use this water heater unless it is completely full of water. To prevent damage to the tank, the tank must be lled with water. Water must ow from the hot water faucet before turning “ON” gas to the water heater.
To ll the water heater with water: 1. Close the water heater drain valve by turning handle to the right
(clockwise). The drain valve is on the lower front of water heater.
2. Open the cold water supply valve to the water heater. NOTE: The cold water supply valve must be left open when the water heater is in use.
3. To insure complete lling of the tank, allow air to exit by opening nearest hot water faucet. Allow water to run until a constant ow is obtained. This will let air out of the water heater and the piping.
4. Check all water piping and connections for leaks. Repair as needed.
VENT PIPE ASSEMBLY
There are three parts of the vent pipe assembly that connect the water heater exhaust (located on lower back side of water heater) to inlet of the blower assembly (mounted on top of water heater) as shown in Figure 1. These parts will need to be assembled according to these instructions.
Assemble Vent Pipe Assemblies #1, #2 and #3 (See Figure 1) prior to cementing. The preferred orientation of Vent Pipe Assembly #1 (Condensate U-Assembly) is shown in Figure 16. However this assembly may be rotated to a different orientation as needed for the specic installation requirements. Note the rotational orientation of each part by marking a line several inches long across the joints.The long tube of Vent Pipe Assembly #2 should be approximately vertical. If it is found that either of the two pieces of pipe in Vent Pipe Assembly #2 are too long for proper t-up, then remove as little material as possible to improve the t-up. Keep in mind that the pipes will insert slightly further into the elbows when cement is applied as it acts as a lubricating agent. The vertical distance from the bottom of the Condensate U-Assembly to the oor that supports the water heater should be approximately 0.25″ (0.64 cm), see Figure 16. Disassemble the parts and cement back together using the alignment marks. After the cement dries, attach the assembly to the blower and the water heater exhaust using the supplied rubber boots and hose clamps.
A condensate trap is incorporated in the bottom of this vent pipe assembly. See the CONDENSATE section of this manual for further details.
VENTING

FIGURE 14.
FILLING THE WATER HEATER

Breathing Hazard – Carbon Monoxide Gas
· Install vent system in accordance with codes. · Do not operate water heater if exposed to flooding
or water damage.
· High altitude models should be installed at elevations above 5,300 feet (1,615 m). For operation above 10,100 feet (3,079 m), a high altitude orifice must be installed.
· Do not operate if soot buildup. · Do not obstruct water heater air intake with
insulating jacket.
· Do not place chemical vapor emitting products near water heater.
· Gas and carbon monoxide detectors are available. · Never operate the heater unless it is vented to the
outdoors and has adequate air supply to avoid risks of improper operation, fire, explosion or asphyxiation.
· Analyze the entire vent system to make sure that condensate will not become trapped in a section of vent pipe and therefore reduce the open cross sectional area of the vent.
Breathing carbon monoxide can cause brain damage or death. Always read and understand instruction manual.
18

TERMINATION CLEARANCES SIDEWALL POWER VENT
FIGURE 15. Vent terminal clearances for “Power Vent” installations. Power Vent congurations use room air for combustion.

VENT PIPE TERMINATION

in Figure 15.

The rst step is to determine where the vent pipe will terminate. See Figures 15, 20 and 21. The vent may terminate through a sidewall as shown in Figure 20 or through the roof as shown in Figure 21.
The vent system must terminate so that proper clearances are maintained as cited in local codes or the current edition of the Natural Gas and Propane Installation Code (CAN/CSA-B149.1).
Instructions on proper installation through a sidewall are provided

Plan the vent system layout so that proper clearances are maintained from plumbing and wiring.
Vent pipes serving power vented appliances are classied by building codes as “vent connectors”. Required clearances from combustible materials must be provided in accordance with information in this manual under LOCATING THE NEW WATER HEATER and INSTALLING THE WATER HEATER, and with the Natural Gas and Propane Installation Code (CSN/CSA-B149.1) and local codes.

19

PLANNING THE VENT SYSTEM

Plan the route of the vent system from the discharge of the blower to the planned location of the vent terminal. Water heaters covered by these instructions are Category IV appliances.

1. Layout the total vent system to use a minimum of vent pipe and elbows.

2. This water heater is capable of venting ue gases equivalent to 25′ (7.6 m) of 2″ pipe, 65′ (19.8 m) of 3″ pipe, or 128′ (39.0 m) of 4″ pipe as listed in Table 2.

TABLE 2

Number of 90° Elbows
1 2 3 4 5 6

2″ Maximum Pipe – ft. (m)
20 (6.1) 15 (4.6) 10 (3.0)
—-

3″ Maximum Pipe – ft. (m)
60 (18.3) 55 (16.8) 50 (15.2) 45 (13.7) 40 (12.2) 35 (10.7)

4″ Maximum Pipe – ft. (m)
120 (36.6) 112 (34.1) 104 (31.7) 96 (29.3) 88 (26.8) 80 (24.3)

The minimum vent lengths for each of the pipe sizes is one 90° on top of the unit plus 2′ (61cm) of straight pipe and the appropriate termination.
NOTE: The equivalent feet (m) of pipe listed above are exclusive of the termination. That is, the termination, with an installed screen, is assumed to be in the system and the remainder of the system must not exceed the lengths discussed above.
3. The blower discharge adapter is made to accept only straight sections of 2″ pipe. To start, a minimum of 2 inches (5.1 cm) of 2″ pipe must be attached to the blower discharge, see Figure 17.
If using 2″ inch vent pipe: A minimum of 2 inches (5.1 cm) must be attached to the blower before the rst elbow. After the rst elbow add the additional venting required for the installation. The total system cannot exceed the lengths discussed above, where each elbow is equal to 5 feet (1.5 m) of straight pipe. The SS2 tting, if used, counts as being one 90 degree elbow.
If using 3″ or 4″ inch vent pipe: Two inches (5.1 cm) of pipe must be attached to blower discharge before adding a reducer to acquire desired pipe diameter. An appropriately sized 45 degree schedule 40 DWV

elbow (field supplied) vent terminal must be obtained with an equivalent screen (supplied in vent kit). The total system cannot exceed equivalent pipe lengths discussed above where each elbow is equal to 5 feet (1.5 m) of straight pipe (3″ vent pipe) or 8 feet (2.4 m) of straight pipe (4″ vent pipe). The SS2 tting, if used, counts as one 90 degree elbow.
APPROVED VENT/INTAKE MATERIAL:
Approved vent and intake air pipe materials that may be used in the United States:
PVC pipe materials: · DWV ASTM-D2665 or CSA B181.2 · Schedule 40, 80, 120 ASTM-D1785 or CSA B137.3 · SDR Series ASTM-2241 or CSA B137.3
CPVC pipe materials: · CPVC 41 ASTM-D2846 or CSA B137.6 · Schedule 40, 80 ASTM-F441 or CSA B137.6 · SDR Series ASTM-F442
Polypropylene – See page 21 · M & G Duravent PolyPro vent system · Centrotherm InnoFlue vent system
Approved vent pipe materials that must be used in Canada: · ULC S636 PVC / CPVC · ULC S636 Polypropylene – See page 21
Approved intake air pipe materials that must be used in Canada: PVC pipe materials: · DWV ASTM-D2665 or CSA B181.2 · Schedule 40, 80, 120 ASTM-D1785 or CSA B137.3 · SDR Series ASTM-D2241 or CSA B137.3
CPVC pipe materials: · CPVC 41 ASTM-D2846 or CSA B137.6 · Schedule 40, 80 ASTM-F441 or CSA B137.6 · SDR Series ASTM-F442
Polypropylene – See page 21 · M & G Duravent PolyPro vent system · Centrotherm InnoFlue vent system
NOTE: The use of cellular core PVC (ASTM F891), cellular core CPVC, or Radel® (polyphenolsulfone) in non-metallic venting systems is prohibited. Covering non-metallic vent pipe and ttings with thermal insulation is prohibited.

TABLE 3

M&G Duravent Polypro

Nominal Pipe Diameter

Flue Outlet Adapter

Adapter Connector

Ring Connector

90 Degree Elbow

Vent Material

2

2PPS-AD

PPS-PAC 2PPS-LB 2PPS-E90

2PPS

Terminal(s)
2PPS & 2PPS-BG for Exhaust; 2PPS-E90 & 2PPS-BG for Intake (Direct Vent only)

3PPS & 3PPS-BG for Exhaust;

3

3PPS-AD

PPS-PAC 3PPS-LB 3PPS-E90

3PPS

3PPS-E90 & 3PPS-BG for

Intake (Direct Vent only)

TABLE 4

Centrotherm InnoFlue

Nominal Pipe Diameter

Flue Outlet Adapter

Adapter Connector

Ring Connector

90 Degree Elbow

Vent Material

Terminal(s)

2

ISAGL 0202

IAFC02

IANS02 ISELL0287

ISVL02

ISVL02 & IASPP02 for Exhaust; ISELL0287 & IASPP02 for Intake
(Direct Vent only)

3

ISAGL 0303

IAFC03

IANS03 ISELL0387

ISVL03

ISVL03 & IASPP03 for Exhaust; ISELL0387 & IASPP03 for Intake
(Direct Vent only)

20

PVC Materials should use ASTM D-2564 Grade Cement; CPVC Materials should use ASTM F-493 Grade Cement and ABS Materials should use ASTM D-2235 Grade Cement.
If water heater is being installed as a replacement for an existing power vented heater in pre-existing venting, a thorough inspection of existing venting system must be performed prior to any installation work. Verify that correct material as detailed above has been used, and that minimum or maximum vent lengths and terminal location as detailed in this manual have been met. Carefully inspect entire venting system for any signs of cracks or fractures, particularly at joints between elbows and other ttings and straight runs of vent pipe. Check system for signs of sagging or other stresses in joints as a result of misalignment of any components in system. If any of these conditions are found, they must be corrected in accordance with venting instructions in this manual before completing installation and putting water heater into service.
NOTE: A. For water heaters in locations with high ambient temperatures (above 100°F) it is recommended that CPVC pipe and ttings be used. B. A 22.5 degree elbow (2″ vent pipe) or a 45 degree elbow (3″ and 4″ vent pipe) with an installed screen VENT TERMINAL must be used in all cases.
4. There will be some installations where condensate will be formed in the horizontal runs of the vent system. This condensate will run into the condensate boot attached to the blower and out the tting. The water heater is shipped with condensate hose that attaches to the tting on the condensate boot. No other Tee or tting is required. See Figures 17, 20 and 21.
POLYPROPYLENE INSTALLATIONS
The water heater has been approved to be installed with Polypropylene vent material as shown in Table 3 and Table 4. The approved application of single wall, non-exible, nonconcentric Polypropylene vent material is offered by two specic manufacturers (Centrotherm ECO Systems and DuraVent Polypropylene). These listed products must be installed by following the vent manufacturer’s instructions. Refer to Table 2 on Page 20 to determine the maximum pipe length and number of elbows that can be used.
Insulation should not be used on Polypropylene venting materials. The use of insulation will cause increased vent wall temperatures, which could result in vent pipe failure.
Use only the adapters and vent system listed in Tables 3 and 4 on page 20. DO NOT mix vent systems of different types or manufacturers. Failure to comply could result in severe personal injury, death, or substantial property damage.
Installations must comply with applicable national, state, and local codes. For Canadian installation, Polypropylene vent must be listed as a ULC-S636 approved system. If Polypropylene vent is not required by your local code, you may use either PVC or CPVC pipes for your water heater that allows non- metallic venting material installations.
Polypropylene vent systems do not use cement to connect the pipe and elbow sections but use a push together gasket seal method. Do not attempt to connect Polypropylene with sealant cement. All vent connections MUST be secured by the vent manufacturer’s joint connector. The installer must use a specic vent starter adapter at the ue connection. The adapter is supplied by the vent manufacturer to adapt to its vent system.
In order to be in full compliance with UL 1738 or ULC-S636 and to meet the requirements of the water heater manufacturer, you must use the metal joint connector rings, available from the Polypropylene vent manufacturer, to stiffen the joints of 2″, and 3″ diameter pipes.
CONDENSATE
This water heater is a condensing unit and requires a drain to be located in close proximity to allow condensate to drain safely. One hose from blower housing and two exible hoses from blower outlet adaptor, run to barb ttings on vent pipe assembly #2. Hose is clamped by rubber clips and exible hoses by a clamp on jacket top cover. See Figure 17. Condensate drains from the unit at the exhaust tee located at the bottom of the unit (see gure 16). Condensate from this water heater is mildly acidic. Please note

that some local codes require that condensate is treated by using a pH neutralizing lter prior to disposal.
NOTE: It is important that the eld supplied drain lines beyond the 1/2″ adaptor of vent pipe assembly #1 should be installed continuously tilted downward toward an appropriate drain. See Figure 16. If these instructions are not followed or if condensate drain line is blocked, water will spill from condensate trap. Do not block the holes in the hex plug on top of a small tee in vent pipe assembly #1. As with every water heater installation, a drain pan should be used to prevent water damage to surrounding area. If necessary, a condensate pump with an incorporated reservoir may be used to pump water to an appropriate drain. To avoid condensate spillage, select a pump with an overow switch.
Caution must be used to ensure that drain is free and clear of debris and will not allow backow through the condensate drain line. Consideration must be given to avoid freezing of the condensate lines which could result in excessive build up of condensate inside the water heater. Waterproof heat tape may be required to prevent freezing of condensate lines. Please ensure that the outlet of condensate drain does not create a slippery condition which could lead to personal injury. Care should be taken to ensure there is no kink or twist in any condensate hose. The unused barb tting in vent pipe assembly

2 should be plugged using one of the break-away plugs.

Breathing Hazard – Carbon Monoxide Gas
· Do NOT block the holes in the hex plug of vent pipe assembly #1.
· Do NOT elevate any portion of the field supplied drain line beyond the 1/2″ adaptor above the adaptor. This must be true for entire length of the drain line including the exit into an appropriate drain.
· Condensate lines must be free and clear of debris and must not allow back flow through drain line. Condensate lines must be able to flow freely to an appropriate drain.
· Do not allow condensate lines to become crimped closed. · Analyze entire vent system to make sure that condensate
will not become trapped in a section of vent pipe and therefore reduce open cross sectional area of vent.
Breathing carbon monoxide can cause brain damage or death. Always read and understand instruction manual.
The condensate trap may be primed by lling the CONDENSATE U-ASSEMBLY with tap water while the water heater is not operating. The system is fully primed when the water level reaches the adaptor connected into the Tee. In most installations the water heater will selfprime the condensate trap during the rst full heat-up cycle. If a sound of air bubbling through water (gurgling) is heard while the blower is operating after the rst heat-up cycle, then turn the unit off and contact your plumber or service representative.
If these instructions are not followed, the condensate build-up will block the exhaust outlet, which will cause improper operation.
Do NOT block or plug any hole in this hex plug.

DRAIN LINE

CONDENSATE U-ASSEMBLY, AKA. VENT PIPE ASSEMBLY #1

APPROXIMATELY 0.25″ (0.64 cm)
*NO PORTION OF THE FIELD SUPPLIED DRAIN LINE BEYOND THE 1/2″ ADAPTOR MAY BE ELEVATED HIGHER THAN THE ADAPTOR. THIS MUST BE TRUE FOR THE ENTIRE LENGTH OF DRAIN LINE INCLUDING EXIT INTO AN APPROPRIATE DRAIN.
FIGURE 16.

21

Condensate is likely to form in the venting system attached to this water heater. The vent pipe should be sloped downward away from the blower assembly (not less than 1/8″ (3.2 mm) nor greater than 1/2″ (12.7 mm) per foot (30 cm) maximum). If the vent piping is vented level or sloped upwards away from the blower assembly, then adequate means for draining and disposing of the condensate needs to be made by the installer. Two 3/8″ condensate hoses should be connected to the built in drain ports of blower outlet adaptor. The unused barb fitting on vent pipe assembly #2 should be plugged with one of the breakaway plugs. See Figure 17.
Condensate neutralizer kits are available. Contact your distributor or Service Agency.
BLOWER ASSEMBLY INSTALLATION
1. This power vented water heater comes with blower assembly installed.
2. After unit is set in place, make sure blower assembly is still mounted securely. Make sure there is no damage to blower.
3. Condensate drains from three locations on blower assembly. See Figure 17. One exible hose runs from bottom of blower housing; two run from the ports of rubber connector at the outlet of blower. All these three condensate hoses are connected to barb ttings at vent pipe assembly #2. The hose from bottom of blower housing is clamped by two clamps and the two hoses from rubber connector are harnessed by another clamp. Make sure there is no kink or twist.
FIGURE 17. 4. Make sure there is no packing material in the inlet or discharge
of the blower. 5. Make sure that the plastic tubing is still attached from the air
pressure switch to the port on the blower housing. Make sure the plastic tubing is not folded anywhere between the pressure switch and the blower housing. 6. Make sure the ON/OFF switch is in the OFF position and that the outer harness is connected from the blower control box to the connector on the bottom side of the gas valve. 7. If the outer harness is not factory installed, make sure the ON/ OFF switch is in the OFF position and then connect the outer harness from the blower control box to the connector on the bottom side of the gas valve.

8. Do not plug in power cord until vent system is completely installed. The Power Vent operates on 110-120 Vac. therefore a grounded outlet must be within reach of the 6 foot (1.8 m) exible power cord supplied with the vent (See Figure 1). The power cord supplied may be used on a unit only where local codes permit. If local codes do not permit use of exible power supply cord:
A. Make sure the unit is unplugged from the wall outlet. Remove the plastic top cap. Remove screws and open panel on the front of the control box on the blower.
B. Cut the exible power cord, leaving enough to be able to make connections. Remove the strain relief tting from the box.
C. Install a suitable conduit tting inside the enclosure.
D. Splice eld wiring into existing wiring using code authorized method (wire nuts, etc).
E. Be certain that neutral and line connections are not reversed when making these connections (proper polarity).
F. Ground heater properly. This water heater must be grounded in accordance with the Canadian Electrical Code C22.1 and/ or local codes. These must be followed in all cases.
The water heater must be connected to a grounded metal, permanent wiring system; or an equipment grounding conductor must be run with the circuit conductors and connected to the equipment grounding terminal or lead on the water heater, see Figure 19.
G. Close the panel on the control box. Make sure that the access panel is secured shut.
9. The blower discharge boot is made to accept only straight sections of 2″ pipe. To start off with an elbow, a short section of the furnished pipe, a minimum of 2 inches (5.1 cm), must be cut and glued into the end of the elbow that will mount on the discharge boot.
INSTALLATION OF VENT SYSTEM
Before beginning installation of piping system thoroughly read the section of this manual VENT PIPE PREPARATION. If you are installing your system so that it vents through roof, please refer to section titled INSTALLATION OF VERTICAL VENT SYSTEM.
VENT SOUND SILENCER
The Vent Sound Silencer (SS2) is optional. It is useful to reduce the sound level outside, near the vent terminal. The SS2 must always be installed directly above the blower outlet, with the closed end horizontal to the ground. See Figure 1. The closed end that contains the sound absorbing padding must never be mounted pointed towards the ground since it would ll with condensate. The SS2 counts as 5 equivalent feet in the overal length of the vent system.
VENT TERMINAL INSTALLATION, SIDEWALL
1. Install the vent terminal by using the cover plate as a template to mark the hole for the vent pipe to pass through the wall. BEWARE OF CONCEALED WIRING AND PIPING INSIDE THE WALL.
2. If the Vent Terminal is being installed on outside of a nished wall, it may be easier to mark both the inside and outside wall.

22

Align holes by drilling a hole through center of the template from the inside through to the outside. The template can now be positioned on the outside wall using the drilled hole as a centering point for the template.
3. A) MASONRY SIDE WALLS Chisel an opening approximately one half inch (1.3 cm) larger than the marked circle.
B) WOODEN SIDE WALLS Drill a pilot hole approximately one quarter inch (0.64 cm) outside of the marked circle. This pilot hole is used as a starting point for a saws-all or sabre saw blade. Cut around the marked circle staying approximately one quarter inch (0.64 cm) outside of the line. (This will allow the vent to easily slide through the opening. The resulting gap will be covered up by the Vent Terminal cover plate.) Repeat this step on inside wall if necessary.
SEQUENCE OF INSTALLATIONS, FIGURE 18
Cut a length of PVC pipe about 3.5 inches (8.9 cm) longer than wall thickness at the opening. Glue vent terminal to this section of pipe.

Slide the wall plate over the pipe to stop against the vent terminal. Place a bead of caulking (not supplied) around the gap between the pipe and cover plate. Apply enough to ll some of the gap between the pipe and wall. Place some of the caulking on the back of the plate to hold it against the wall after installation. If the vent pipe is installed up to the wall, with a coupling on the end against the wall opening, the pipe with the vent terminal can be prepared for gluing before inserting through the wall. Slide the pipe through the wall and insert into the coupling on the other side of the wall, making sure that the vent terminal ends up pointed in the correct position, see Figure 18.
VENT TERMINATION – FIGURE 18.

CAUTION LABEL ALL WIRES PRIOR TO DISCONNECTION WHEN SERVICING CONTROLS. WIRING ERRORS CAN CAUSE IMPROPER AND DANGEROUS OPERATION. VERIFY PROPER OPERATION AFTER SERVICING.

POWER VENT WIRING SCHEMATIC – FIGURE 19. 23

INSTALLATION OF VENT SYSTEM, SIDEWALL
With the route of the venting system and selection of materials completed, as discussed in the section of this manual titled PLANNING THE VENT SYSTEM, the through the wall vent terminal in place and the rst section of piping, up to rst elbow, installed at the blower it is time to complete the installation of the venting system for the sidewall installation.

additional vent pipe when calculating maximum equivalent feet of venting.
INSTALLATION OF VERTICAL VENT SYSTEM
A proper flashing or “BOOT” should be used to seal the pipe where it exits the roof. The total vent system should not exceed the equivalent feet of pipe as listed in Table 2.

Provide support for all pipe protruding through the roof. All piping should be properly secured. The vent system piping should be supported every 5 feet (1.5 m) of vertical run and every 3 feet (91 cm) of horizontal run. Follow vent pipe manufacturer’s instructions for proper joining procedures.

FIGURE 20.

FIGURE 21.

It is recommended that the completion of the venting system start at the blower assembly and run to the coupling on the inside wall of the vent terminal, Figure18.
The vent system piping should be supported every 5 feet (1.5 m) of vertical run and every 3 feet (91 cm) of horizontal run. Follow vent pipe manufacturer’s instructions for proper joining procedures.
If necessary to achieve the 12 inches (30 cm) minimum clearance above the highest anticipated snow level, install a snorkel as shown in bottom portion of Figure 20.
NOTE: With the installation of a snorkel it is necessary to use two 90° elbows that shall be considered along with the

IMPORTANT
The vent system must terminate so that proper clearances are maintained as cited in local codes or the current edition of the Natural Gas and Propane Installation Code (CAN/CSA-B149.1) and as listed below:
1. Vent Termination must extend a minimum of 12 inches (30 cm) above roof or 12 inches (30 cm) above the anticipated snow level to prevent blockage of the vent termination, as shown in Figures 20 and 21.

24

25

TEMPERATURE REGULATION

It is recommended that lower water temperatures be used to avoid the risk of scalding. It is further recommended, in all cases, that the water temperature be set for the lowest temperature which satises your hot water needs. This will also provide the most energy efcient operation of the water heater.
Short repeated heating cycles caused by small hot water uses can cause temperatures at the point of use to exceed the thermostat setting by up to 20°F (11°C). If you experience this type of use you should consider using lower temperature settings to reduce scald hazards.

To avoid any unintentional changes in water temperature settings, the control has a tamper resistant feature for changing the temperature setting. To change the temperature setting follow these instructions:
1. “Wake Up” the temperature indicators by holding down both “COOLER” and “HOTTER” temperature adjustment buttons at the same time for one second, see Figure 22. One or two of the temperature indicators will light up. These indicators will only remain on for 30 seconds if no further buttons are pressed. After 30 seconds the control will go back to “Sleep” mode.

2. Release both of the temperature adjustment buttons.

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

b. To increase the temperature press and release the “HOTTER” button until the desired setting is reached.

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

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

HOT WATER CAN SCALD: Water heaters are intended to produce hot water. Water heated to a temperature which will satisfy space heating, clothes washing, dish washing, and other sanitizing needs can scald and permanently injure you upon contact. Some people are more likely to be permanently injured by hot water than others. These include the elderly, children, the inrm, or physically/mentally handicapped. If anyone using hot water from this heater ts into one of these groups or if there is a local code or state law requiring a certain temperature water at the hot water tap, then you must take special precautions. In addition to using the lowest possible temperature setting that satises your hot water needs, a means such as a mixing valve, should be used at the hot water taps used by these people or at the water heater. Mixing valves are available at plumbing supply or hardware stores, see Figure 2. Follow manufacturer’s instructions for installation of the valves. Before changing the factory setting on the thermostat, in this manual, see Figure 22.
Never allow small children to use a hot water tap, or to draw their own bath water. Never leave a child or handicapped person unattended in a bathtub or shower.
The water heater should be located in an area where the general public does not have access. If a suitable area is not available, a cover should be installed over the thermostat to prevent tampering.
The water temperature setting was factory set at the lowest temperature;
Pressing the “COOLER” button decreases temperature and
pressing the “HOTTER” button increases the temperature.
Setting water heater temperature at 120°F (49°C) (Approx. ” ” mark on temperature setting of gas valve) will reduce risks of scalds. Some states or local codes require settings at specic lower temperatures.

TEMPERATURE INDICATORS

TEMPERATURE ADJUSTMENT BUTTONS

Water Temperature
C-Flashing = approx. 160°F (71°C) C = approx. 150°F (66°C) B = approx. 140°F (60°C) A = approx. 130°F (54°C)
= approx. 120°F (49°C) WARM = approx. 80°F (27°C)

Display A BC

Time to Produce 2nd & 3rd Degree
Burns on Adult Skin

About 1/2 second

About 1-1/2 seconds

Less than 5 seconds

About 30 seconds

More than 5 minutes

– – – – – – – – – – – – – –

FIGURE 22.

26

FOR YOUR INFORMATION

START UP CONDITIONS
SMOKE/ODOR It is not uncommon to experience a small amount of smoke and odor during the initial start-up. This is due to burning off of oil from metal parts, and will disappear in a short while.
STRANGE SOUNDS Possible noises due to expansion and contraction of some metal parts during periods of heat-up and cool-down do not necessarily represent harmful or dangerous conditions.

If the smelly water persists after the anode replacement and chlorination treatment, we can only suggest that chlorination or aeration of the water supply be considered to eliminate the water problem.
Do not remove the anode leaving the tank unprotected. By doing so, all warranty on the water heater tank is voided.
“AIR” IN HOT WATER FAUCETS

Condensation causes sizzling and popping within the burner area during heating and cooling periods and should be considered normal. See “Condensate” in this manual.

OPERATIONAL CONDITIONS
SMELLY WATER In each water heater there is installed at least one anode rod for corrosion protection of the tank. Certain water conditions will cause a reaction between this rod and the water. The most common complaint associated with the anode rod is one of a “rotten egg smell” in the hot water. The smell is a result of four factors which must all be present for the odor to develop:
a. A concentration of sulfate in the supply water. b. Little or no dissolved oxygen in the water. c. A sulfate reducing bacteria which has accumulated within the
water heater (this harmless bacteria is nontoxic to humans). d. An excess of active hydrogen in the tank. This is caused by the
corrosion protective action of the anode.
Smelly water may be eliminated or reduced in some water heater models by replacing the anode(s) with one of less active material, and then chlorinating the water heater tank and all water lines. Contact the local water heater supplier or service agency for further information concerning an Anode Replacement Kit and this chlorination treatment.

HYDROGEN GAS: Hydrogen gas can be produced in a hot water system that has not been used for a long period of time (generally two weeks or more). Hydrogen gas is extremely ammable and explosive. To prevent the possibility of injury under these conditions, we recommend the hot water faucet, located farthest away, be opened for several minutes before any electrical appliances which are connected to the hot water system are used (such as a dishwasher or washing machine). If hydrogen gas is present, there will probably be an unusual sound similar to air escaping through the pipe as the hot water faucet is opened. There must be no smoking or open ame near the faucet at the time it is open.
HIGH WATER TEMPERATURE SHUT OFF SYSTEM This water heater is equipped with an automatic reset type high limit (Energy Cutoff) sensor. The high limit switch interrupts the main burner gas ow should the water temperature reach 195°F (91°C). The high limit will automatically reset when the water temperature drops below 140°F (60°C). After cooling the tank temperature, turn off the water heater for at least 10 seconds by using the switch on top of the unit. Turn on the water heater. If this fails to correct the problem, contact your plumber or service representative.

27

PERIODIC MAINTENANCE

VENTING SYSTEM INSPECTION

Soot build-up indicates a problem that requires correction before further use. Turn “OFF” gas to water heater and leave off until repairs are made, because failure to correct the cause of the sooting can result in a re causing death, serious injury, or property damage.

FIGURE 23.

BURNER CLEANING

In the event your burner or burner air openings require cleaning, turn the blower switch to the “OFF” position and allow the burner to cool. Call a service agency to remove and clean the burner and correct the problem that required the burner to be cleaned.

HOUSEKEEPING

At least once a year a visual inspection should be made of the venting system. You should look for:

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

1. Obstructions which could cause improper venting. The combustion and ventilation air ow must not be obstructed.
2. Damage or deterioration which could cause improper venting or
leakage of combustion products.

Be sure the vent piping is properly connected to prevent escape of dangerous ue gasses which could cause deadly asphyxiation.

Obstructions and deteriorated vent systems may present serious health risk or asphyxiation.

Chemical vapor corrosion of the ue and vent system may occur if air for combustion contains certain chemical vapors. Spray can propellants, cleaning solvents, refrigerator and air conditioner refrigerants, swimming pool chemicals, calcium and sodium chloride, waxes, bleach and process chemicals are typical compounds which are potentially corrosive.

If after inspection of the vent system you found sooting or deterioration, something is wrong. Call the local gas utility to correct the problem and clean or replace the ue and venting before resuming operation of the water heater.
BURNER OPERATION AND INSPECTION
Flood damage to a water heater may not be readily visible or immediately detectable. However, over a period of time a ooded water heater will create dangerous conditions which can cause DEATH, SERIOUS BODILY INJURY, OR PROPERTY DAMAGE. Contact a qualied installer or service agency to replace a ooded water heater. Do not attempt to repair the unit! It must be replaced!

INSTALLED IN SUITABLE AREA: To insure sufcient ventilation and combustion air supply, proper clearances from the water heater must be maintained. See “Locating the New Water Heater” section. Combustible materials such as clothing, cleaning materials, or ammable liquids, etc. must not be placed against or adjacent to the water heater which can cause a re.
ANODE ROD INSPECTION

At least once a year a visual inspection should be made of the main burner and the hot surface igniter assembly for proper ame characteristics and ignition sequences. This can be done by removing the Outer Door and viewing the main burner operation through the Viewport on the Inner Door, see Figure 1. The main burner should provide complete combustion of gas, ignite rapidly, give reasonably quiet operation, and cause no excessive ame lifting from the burner ports. If the proper ame characteristics are not evident (see Figure 23), make sure that the ow of combustion and ventilation air is not blocked.
You should also check for sooting. Soot is not normal and will impair proper combustion. A visual inspection of the main burner and HSI igniter assembly should also be done at least once a year, see Figure 23.

Each water heater contains at least one anode rod, which will slowly deplete (due to electrolysis) prolonging the life of the water heater by protecting the glass-lined tank from corrosion. Adverse water quality, hotter water temperatures, high hot water usage, and water softening

28

methods can increase the rate of anode rod depletion. Once the anode rod It is recommended that the Temperature-Pressure Relief Valve should

is depleted, the tank will start to corrode, eventually developing a leak.

be checked to ensure that it is in operating condition every 6 months.

Certain water conditions will cause a reaction between the anode rod and the water. The most common complaint associated with the anode rod is a “rotten egg smell” produced from the presence of hydrogen sulde gas dissolved in the water. IMPORTANT: Do not remove this rod permanently as it will void any warranties. The parts list includes a special anode rod that can be ordered if water odor or discoloration occurs. NOTE: This rod may reduce but not eliminate water odor problems. The water supply system may require special ltration equipment from a water conditioning company to successfully eliminate all water odor problems.
Articially softened water is exceedingly corrosive because the process substitutes sodium ions for magnesium and calcium ions. The use of a water softener may decrease the life of the water heater tank.
The anode rod should be removed from the water heater tank every 3 years for inspection. NOTE: articially softened water requires the anode rod to be inspected annually.
The following are typical (but not all) signs of a depleted anode rod: The majority of the rods diameter is less than 3/8″. Signicant sections of the support wire (approx. 1/3 or more of the anode rod’s length) are visible.
If the anode rod show signs of either or both it should be replaced.

When checking the Temperature-Pressure Relief Valve operation, make sure that (1) no one is in front of or around the outlet of the TemperaturePressure Relief Valve discharge line, and (2) that water discharge will not cause any property damage, as water may be extremely hot. Use care when operating valve as the valve may be hot.
To check the relief valve, lift lever at the end of valve several times, see Figure 25. The valve should seat properly and operate freely.
If after manually operating the valve, it fails to completely reset and continues to release water, immediately close the cold water inlet to the water heater and drain the water heater, see Draining And Flushing on page 30-31. Replace the Temperature-Pressure Relief Valve with a properly rated/sized new one, see Temperature-Pressure Relief Valve on page 15-16 for instructions on replacement.
TEMPERATURE-PRESSURE RELIEF VALVE
DISCHARGE PIPE

NOTE: Whether re-installing or replacing the anode rod, check for any leaks and immediately correct if found.
In replacing the anode: 1. Turn off gas supply to the water heater.
2. Shut off the water supply and open a nearby hot water faucet to depressurize the water tank.
3. Drain approximately 5 gallons of water from tank (Refer to “Draining and Flushing” for proper procedures). Close drain valve.
4. Remove old anode rod.
5. Use Teon® tape or approved pipe sealant on threads and install new anode rod.
6. Turn on water supply and open nearby hot water faucet to purge air from water system. Check for any leaks and immediately correct any if found.
Restart the water heater as directed under “Operating Your Water Heater.” See the Repair Parts Illustration for anode rod location.

FIGURE 25.
If the Temperature-Pressure Relief Valve on the water heater weeps or discharges periodically, this may be due to thermal expansion.
Note: Excessive water pressure is the most common cause of Temperature- Pressure Relief Valve leakage. Excessive water system pressure is most often caused by “thermal expansion” in a “closed system.” See Closed Water Systems and Thermal Expansion on page 14-15. The Temperature-Pressure Relief Valve is not intended for the constant relief of thermal expansion.
Temperature-Pressure Relief Valve leakage due to pressure build up in a closed system that does not have a thermal expansion tank installed is not covered under the limited warranty. Thermal expansion tanks must be installed on all closed water systems.
DO NOT PLUG THE TEMPERATURE-PRESSURE RELIEF VALVE OPENING. THIS CAN CAUSE PROPERTY DAMAGE, SERIOUS INJURY OR DEATH.

Explosion Hazard

FIGURE 24.
TEMPERATURE-PRESSURE RELIEF VALVE TEST
DANGER · Burn hazard.

Temperature-Pressure Relief Valve must comply with ANSI Z21.22CSA 4.4 and ASME code.
Properly sized Temperature-Pressure Relief Valve must be installed in opening provided.
Can result in overheating and excessive tank pressure.
Can cause serious injury or death.

· Hot water discharge.
· Keep clear of Temperature-
Pressure Relief Valve discharge outlet.

DRAINING AND FLUSHING
It is recommended that the water heater storage tank be drained and flushed every 6 months to reduce sediment buildup. The water heater should be drained if being shut down during freezing temperatures. See Typical Installation section in this manual for location of the water heater components described below. 29

DANGER

· Burn hazard.
· Hot water discharge.
· Keep hands clear of drain
valve discharge.

TO DRAIN THE WATER HEATER STORAGE TANK:
1. Turn off the electrical supply to the water heater.
2. Turn off the gas supply at the Main Gas Shutoff Valve if the water heater is going to be shut down for an extended period.
3. Ensure the cold water inlet valve is open.
4. Open a nearby hot water faucet and let the water run until the water is no longer hot.
5. Close the cold water inlet valve to the water heater.
6. Connect a hose to the water heater drain valve and terminate it to an adequate drain.
7. Open the water heater drain valve and allow all the water to drain from the storage tank.
8. Close the water heater drain valve when all water in the storage tank has drained.
9. Close the hot water faucet opened in Step 4.
10. If the water heater is going to be shut down for an extended period, the drain valve should be left open.
TO FLUSH THE WATER HEATER STORAGE TANK:
1. Turn off the electrical supply to the water heater.
2. Ensure the cold water inlet valve is open.
3. Open a nearby hot water faucet and let the water run until the

water is no longer hot. Then close the hot water faucet.
4. Connect a hose to drain valve and terminate it to an adequate drain.
5. Ensure the drain hose is secured before and during the entire ushing procedure. Flushing is performed with system water pressure applied to the water heater.
6. Open the water heater drain valve to ush the storage tank. 7. Flush the water heater storage tank to remove sediment and
allow the water to ow until it runs clean. 8. Close the water heater drain valve when ushing is completed. 9. Remove the drain hose.
10. Fill the water heater – see Filling The Water Heater in this manual.
11. Turn on electrical supply to place water heater back in operation.
12. Allow the water heater to complete several heating cycles to ensure it is operating properly.
SERVICE
If a condition persists or you are uncertain about the operation of the water heater contact a service agency.
Use this guide to check a “Leaking” water heater. Many suspected “Leakers” are not leaking tanks. Often the source of the water can be found and corrected.
If you are not thoroughly familiar with gas codes, your water heater, and safety practices, contact your gas supplier or qualied installer to check the water heater.
Read this manual rst. Then before checking the water heater make sure the gas supply has been turned “OFF”, and never turn the gas “ON” before the tank is completely full of water.
Never use this water heater unless it is completely lled with water.

30

LEAKAGE CHECKPOINTS
To prevent damage to the tank, the tank must be lled with water. Water must ow from the hot water faucet before turning “ON” gas to the water heater. A Condensation may be seen on pipes in humid weather or pipe
connections may be leaking. B. The anode rod tting may be leaking. C. Small amounts of water from temperature-pressure relief valve
may be due to thermal expansion or high water pressure in your area. D. The temperature-pressure relief valve may be leaking at the tank tting. E . Water from a drain valve may be due to the valve being slightly opened. F. The drain valve may be leaking at the tank tting. G. Combustion products contain water vapor which can condense on the cooler surfaces of the tank. Droplets form and drip onto the burner or run on the oor. This is common at the time of start-up after installation and when incoming water is cold. H. Water in the water heater bottom or on the floor may be from condensation, loose connections, or the relief valve. DO NOT replace the water heater until a full inspection of all possible water sources is made and necessary corrective steps taken. Leakage from other appliances, water lines, or ground seepage should also be checked. * To check where threaded portion enters tank, insert cotton swab between jacket opening and tting. If cotton is wet, follow “Draining” instructions in the “Periodic Maintenance” section and then remove tting. Put pipe dope or teon tape on the threads and replace. Then follow “Filling the Water Heater” instructions in the “Installing the New Water Heater” section.
31

REPAIR PARTS LIST

Key No. 1 2 3 4 5 6 7 8 9
10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37

Part Description Outer Door Anode Control Valve Assembly Plastic Top Blower Assembly Switch and Harness Assembly T&P Valve Drain Valve Wiring Harness Anode Outlet Vent Pipe Assembly #1 Vent Pipe Assembly #2 Vent Pipe Assembly #3 Inlet Tube Pipe Nipple Burner Tube Assembly Hot Surface Igniter Burner Head Assembly Embossed Inner Door Insulation – Inner Door Insulation – Viewport Window – Observation Viewport Nut – Serrated Hex Flange Screw – Sheet Metal, # 8-15 Orice – Burner Vent Kit Assembly Wall Plate 2″ Wall Plate 3″ Screen and Vent Terminal Assembly Instruction Tag-Wire Screen F/E 3″ Instruction Tag-Wire Screen F/E 4″ Instruction Sheet Wire Screen 3″ Wire Screen 4″ Wall Plate 4″ Flexible Tubing

Now that you have purchased this water heater, should a need ever exist for repair parts or service, simply contact the company it was purchased from or direct from the manufacturer listed on the rating plate on the water heater.
Be sure to provide all pertinent facts when you call or visit.
Selling prices will be furnished on request or parts will be shipped at prevailing prices and you will be billed accordingly.
The model number of your Gas Water Heater will be found on the rating place located above the gas control valve.
WHEN ORDERING REPAIR PARTS, ALWAYS GIVE THE FOLLOWING INFORMATION:
· MODEL NUMBER · TYPE GAS (NATURAL OR PROPANE (L.P.) · SERIAL NUMBER · PART DESCRIPTION
THIS IS A REPAIR PARTS LIST, NOT A PACKING LIST. PARTS ARE NOT DRAWN TO SCALE.
32

13

2

5 14 15 4 6
7
10

12 9 3 8

11

1

18

16

17

24

26 16
25 20

23

21

24

22 25

19

27 34 35 28

29

32

30 31

33

37

36

TROUBLESHOOTING GUIDELINES
Please check guidelines below. For your safety, water heater service should be performed only by a qualied service technician. Read the GENERAL SAFETY INFORMATION section rst.

INTELLI-VENT TROUBLESHOOTING CHART – USER CONTROL

LED STATUS

PROBLEM

SOLUTION

1 Ensure the wall outlet (power supply) is properly

grounded.

1

Inadequate or no earth ground.

2 Ensure all ground connections/wires on the water

heater are securely connected.

1 Ensure that the water heater is securely connected to earth ground.

2

High resistance to earth ground or reversed polarity in the 120 VAC power supply.

2 Ensure that the wall outlet/power supply is properly wired. Also, ensure that internal 120 VAC wiring connections and wiring harness have no reversed

wires. 120 VAC “hot” wire must connect to the on/off

switch.

Pressure switch circuit remaining

closed for more than 5 seconds

1 Ensure air pressure switch circuit wiring is correct and

3

after heating cycle begins.

the air pressure switch is not jumpered.

Blower may not start in this condition.

2 Replace the air pressure switch.

1 Ensure the air pressure switch sensing tube is properly connected at both ends and is not kinked or damaged.

4

Pressure switch circuit remains open longer than 5 seconds after the blower is energized.

2 Ensure the correct size of vent and intake air pipe (direct vent products) was used per the installation instructions in the manual that came with the water heater.

Blower may run continuously in this condition.

3 Ensure maximum number of elbows or maximum equivalent feet of vent or intake air pipe has not been exceeded per the installation instructions in the manual

that came with the water heater.

4 Ensure there are no obstructions in the vent or intake air pipe.
1 Check wiring to the hot surface igniter assembly replace igniter assembly if wiring is damaged or worn.

2 Check resistance of the igniter at igniter assembly

plug – should be between 11 and 18 ohms at room

temperature (77° F at plug end) – replace igniter if open

or shorted.

5

Open igniter circuit.

3 Check igniter assembly plug and the socket on the gas

control valve/thermostat for good connection. Replace

igniter assembly if the plug is worn or damaged.

4 Replace the gas control valve/thermostat if the igniter assembly socket on the bottom of the control is worn or damaged.

Ignition/ame failure.

1 Ensure ame sensor is making good contact with the burner ame and ensure ame is steady. Also ensure supply and manifold gas pressures are within the requirements in the installation manual.

The gas control valve/thermostat

2 Gas supply is turned off – pressure is too low. For low gas pressure, consult with your gas utility

has reached the maximum number

6

of retries (3) for ignition and is currently locked out for one hour.

3 Ensure the ame sensor is clean – use ne steel wool to clean the ame sensor.

4 Check igniter assembly plug and the socket on the

Cycle the power to the water heater off and on to reset.

bottom of the gas control valve/thermostat for good connection. Replace igniter assembly if the plug is worn or damaged. Replace the gas control valve/thermostat if

socket is worn or damaged.

5 Replace igniter assembly.

33

LED STATUS

PROBLEM

SOLUTION

7 8 9

Self diagnostic check has detected a problem with the gas valve driver circuit, internal microprocessor, or other internal circuits.

1 Turn the power off for 10-20 seconds then on again to clear these error codes.
2 If any of these error codes persist or cannot be cleared – replace the gas control valve/thermostat.

1 Turn the power off for 10-20 seconds then on again to

10

Flame signal sensed out of proper sequence.

clear these error codes. 2 Replace the gas control valve/thermostat if this error

code persists.

1 Turn the power off for 10-20 seconds then on again to

Water in the tank has exceeded the clear these error codes.

11

maximum allowable temperature,

activating the ECO (energy cut off). 2 Replace the gas control valve/thermostat if the error

code persists.

1 Press and release both temperature adjust buttons

12

One or both of the temperature adjust buttons are stuck.

several times – cycle water heater power off and on. 2 Replace the gas control valve/thermostat if the error

code persists.

13

The water temperature sensor (located in the control valve’s immersion probe) is either open or shorted.

1 Turn the power off for 10-20 seconds then on again to clear these error codes.
2 Replace the gas control valve/thermostat if the error code persists.

1 Turn off power to the water heater. Ensure all FV

sensor wiring, the ignitor assembly plug, and the ignitor

assembly socket on the bottom of the Intelli-Vent

14

The FV ( ammable vapor) sensor is either open or shorted.

control are making good contact. Repair or replace any worn/damaged components that are not making

good connection.

2 Replace the FV sensor.
1 Do not touch any electrical switch, do not use any phone in your building, and do not try to light any appliance.

2 Smell around the water heater to ensure there are

no gas leaks at the gas control valve/thermostat, in

the supply gas line(s), or any other type of ammable

Self diagnostic check has detected

vapor(s) in the area.

15

the presence of ammable vapors from the FV ( ammable vapor) sensor.

2 Carefully inspect the area surrounding the water heater for any substances such as gasoline, paint, paint thinners, varnish, or cleaners that could emit ammable

vapors. Remove anything that can potentially emit

ammable vapors from the area and store it properly in

a different location..

3 Call the technical information support phone number shown on the water heater labeling for further assistance.

1 On models equipped with a dilution air intake screen on

Air pressure switch circuit is

the blower assembly – check/clean the screen.

16

opening repeatedly during one heating cycle.

2 On models equipped with a combustion air intake screen on the base ring (bottom) of the water heater –

LDO (Lint, Dust, and Oil) lockout

check/clean the screen.

condition.

3 Ensure intake air screen(s) on models so equipped are

not obstructed.

34

TROUBLESHOOTING GUIDELINES
These guidelines should be utilized by a qualied service agent.
35

TROUBLESHONOOTTIENSG GUIDELINES
36

TROUBLESHONOOTTIENSG GUIDELINES
37

TROUBLESHONOOTTIENSG GUIDELINES
38

LIMITED RESIDENTIAL GAS WARRANTY

THIS WARRANTY IS APPLICABLE TO THE ORIGINAL OWNER ONLY. If the glass lined tank in this water heater shall prove upon examination by (the warrantor) to have leaked during the warranty period in normal residential use, due to natural corrosion from potable water therein, the warrantor will furnish the ORIGINAL OWNER a replacement water heater of equivalent size and current model, or a replacement part for any component part which fails in normal use, in accordance with the warranty terms and conditions specied below. THE WATER HEATER REPLACEMENT MODEL OR PART WILL BE WARRANTED FOR ONLY THE UNEXPIRED PORTION OF THE ORIGINAL WARRANTY. The warranty period will be determined by the original installation date of the water heater. PROOF-OF-PURCHASE AND PROOF-OF-INSTALLATION ARE NECESSARY
TO VALIDATE THIS WARRANTY. This warranty is not transferable.

Product Line 6G5076NVC 02 6G5076NVC 04

WARRANTY PERIOD TANK1
6 YEARS 6 YEARS

PARTS2 6 YEARS 6 YEARS

When the water heater has been used for other than single family residential application: 1. The Tank warranty shall be reduced to 3 years on 10 year models and 1 year on 6 and 8 year models. 2. The parts warranty shall be reduced to 1 year for all models. Returned parts which meet any of the following conditions are not covered by this warranty: 1) improper installation or removal; 2) damaged by other than normal wear; 3) replaced for cosmetic purposes; or 4) returned with defaced date codes.
CONDITIONS AND EXCEPTIONS
This warranty shall apply only when the water heater is installed and operated in accordance with: 1) all local re codes and plumbing codes, ordinances and regulations; 2) the printed instructions provided with it; 3) good industry practices; and 4) proper safety practices such as but not limited to a properly sized drain pan if installed in an area where leakage from connections of the tank would result in damage to the area adjacent to the heater. In addition, a new temperature and pressure relief valve, certied by the Canadian Standards Association must have been properly installed and piped to the nearest drain.

This warranty shall apply only when the heater is: · owned by the original purchaser; · used at temperatures not exceeding the maximum calibrated
setting of its thermostat; · not subjected to excessive water pressure uctuations and not
subject to an operating pressure greater than 150 P.S.I.; · lled with potable water, free to circulate at all times and with the
tank free of damaging water sediment or scale deposits; · used in a non- corrosive and non-contaminated atmosphere; · used with factory approved anode(s) installed; · in its original installation location; · in the United States and its territories or possessions or Canada; · sized in accordance with proper sizing techniques for residential
water heaters; · bearing a rating plate which has not been altered, defaced or
removed except as required by the warrantor; · used in an open system or in a closed system with a properly
sized and installed thermal expansion tank; · red at the factory rated input using the fuel stated in the face of
the rating plate; · operated with inner and outer combustion chamber doors in place; · maintained in accordance with the instructions printed in the
manual included with the heater.

b. Shipping and delivery charges for forwarding the new water heater or replacement part from the nearest distributor and returning the claimed defective heater or part to such distributor except in the state of California where such charges are the manufacturer’s responsibility.
c. All cost necessary or incidental for handling and administrative charges, and for any materials and/or permits required for installation of the replacement heater or part.
LIMITATION ON IMPLIED WARRANTIES
Implied warranties, including any warranty of merchantability imposed on the sale of this heater under state law are limited to one year duration for the heater or any of its parts. Some jurisdictions do not allow limitations on how long an implied warranty lasts, so the above limitations may not apply to you.
CLAIM PROCEDURE
Any claim under this warranty should be initiated with the dealer who sold the heater, or with any other dealer handling the warrantor’s products.
The warrantor will only honor replacement with identical or similar water heater or parts thereof which are manufactured or distributed by the warrantor.
Dealer replacements are made subject to in-warranty validation by warrantor.
PROOF-OF-PURCHASE AND PROOF-OF-INSTALLATION DATES ARE REQUIRED TO SUPPORT WARRANTY FOR CLAIM FROM ORIGINAL OWNER. THIS FORM DOES NOT CONSTITUTE PROOFOF- PURCHASE OR PROOF-OF-INSTALLATION.
DISCLAIMERS NO EXPRESS WARRANTY HAS BEEN OR WILL BE MADE IN BEHALF OF THE WARRANTOR WITH RESPECT TO THE MERCHANTABILITY OF THE HEATER OR THE INSTALLATION, OPERATION, REPAIR OR REPLACEMENT OF THE HEATER OR PARTS. THE WARRANTOR SHALL NOT BE RESPONSIBLE FOR WATER DAMAGE, LOSS OF USE OF THE UNIT, INCONVENIENCE, LOSS OR DAMAGE TO PERSONAL PROPERTY, OR OTHER CONSEQUENTIAL DAMAGE. THE WARRANTOR SHALL NOT BE LIABLE BY VIRTUE OF THIS WARRANTY OR OTHERWISE FOR DAMAGE TO ANY PERSONS OR PROPERTY, WHETHER DIRECT OR INDIRECT, AND WHETHER ARISING IN CONTRACT OR IN TORT.
Some jurisdictions do not allow the limitation or exclusion of incidental or consequential damages, so the above limitation or exclusion may not apply to you.
This warranty gives you specic legal rights, and you may also have other rights which vary from state to state. Should governmental regulations or industry standards prohibit the Manufacturer from furnishing a comparable model replacement under this warranty, the Owner will be furnished with the closest comparable water heater meeting the current governmental regulations and industry standards. A supplementary fee may be assessed to cover the additional cost associated with the changes made to meet applicable regulations and standards.
Fill out and keep with water heater.
IMPORTANT INFORMATION
Model Number____

Any accident to the water heater or any part thereof (including freezing,
re, oods, or lightning), any misuse, abuse or alteration of it, any operation of it in a modied form, or any attempt to repair tank leaks or parts, will void this warranty.

Serial Number_____ Installation Information: Date Installed ____

SERVICE AND LABOR RESPONSIBILITY
UNDER THIS LIMITED WARRANTY, THE WARRANTOR WILL PROVIDE ONLY A REPLACEMENT WATER HEATER OR PART THEREOF. THE OWNER IS RESPONSIBLE FOR ALL OTHER COSTS. Such costs may include but are not limited to: a. Labor charges for service, removal, or reinstallation of the water
heater or part thereof.

Company’s Name Street or P.O. Box City, Province and Postal Code __ Phone Number Plumber’s Name

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GSW Water Heating 599 Hill Street West Fergus, ON Canada N1M 2X1 Should you have any questions please Email us at techsupport@gsw-wh.com or Visit our websites: www.gsw-wh.com or www.johnwoodwaterheaters.com or Call our Technical Support line at 1-888-GSW-TECH (479-8324)
GSW Water Heating is a division of A.O.Smith Enterprises Ltd. Copyright © 2016 GSW Water Heating. All rights reserved.
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References

• W&H Impex Inc | Dental Products For Dentistry » Get your practice equipment
• GSW Water Heaters Canada
• John Wood Water Heaters

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