A.O. Smith FMD 40, FMD 50, FMD 30, 315795-000 MH User Manual

Instruction Manual

RESIDENTIAL DIRECT VENT GAS WATER HEATERS

FOR USE ONLY IN MANUFACTURED HOMES

FOR USE ONLY WITH VENTING SYSTEMS SUPPLIED WITH THE WATER HEATER WHETHER A NEW INSTALLATION OR A REPLACEMENT INSTALLATION.

CANADIAN MANUAL

• 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.

KEEP THIS MANUAL IN THE POCKET ON HEATER FOR FUTURE REFERENCE

WHENEVER MAINTENANCE ADJUSTMENT OR SERVICE IS REQUIRED.

PRINTED IN THE U.S.A 0209 PART NO. 315795-000

SAFE INSTALLATION, USE AND SERVICE

Your safety and the safety of others is extremely important in the installation, use and servicing of this water heater.

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 indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury.

WARNING indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury.

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

• Qualiﬁ ed Technician: A qualiﬁ ed technician must be licensed/authorized to install gas water heaters and to work with

natural/L.P. gas, gas/air venting, and gas components. He or she must also have appropriate trade knowledge and a thorough understanding of the requirements of the Natural Gas and Propane Installation Code (CSA B149.1-current edition) as it relates to the installation of gas ﬁ red water heaters. The qualiﬁ ed technician must also be familiar with the design features and use of ﬂ ammable vapor ignition resistant water heaters, and have a thorough understanding of this instruction manual.

• Service Agency: Employees/representatives of a service agency must also be licensed/authorized to install gas water

heaters and to work with natural/L.P. gas, gas/air venting, and gas components. Its employees and representatives must also have appropriate trade knowledge and a thorough understanding of the requirements of the Natural Gas and Propane Installation Code (CSA B149.1-current edition) as it relates to the installation of gas ﬁ red water heaters. The service agency employees/representatives must also have a thorough understanding of this instruction manual, and be able to perform repairs strictly in accordance with the service guidelines provided by the manufacturer.

• 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.

GENERAL SAFETY

TABLE OF CONTENTS

SAFE INSTALLATION, USE AND SERVICE..................................2

GENERAL SAFETY........................................................................3

TABLE OF CONTENTS ..................................................................4

INTRODUCTION ............................................................................4

Preparing for the New Installation .............................................4

TYPICAL INSTALLATION ............................................................5-6

LOCATING THE NEW WATER HEATER ....................................... 7

Facts to Consider About Location ..........................................7-8

Insulation Blankets .................................................................8-9

INSTALLING THE NEW WATER HEATER ...............................9-19

Water Heater Installation ......................................................9-10

Securing Water Heater to Floor and Wall ................................10

Roof Jack Installation .........................................................11-14

Manufactured Home installed Over Basement or

Crawl space-Air Intake Through an Outside wall ...............12,13

Cutting Opening Through an Outside Wall and

Collar Installation ................................................................13

Cementing PVC, ABS or CPVC Pipe and Fittings .............. 13

Water Piping ............................................................................14

T & P Valve and Pipe Insulation ....................................14,15

Temperature Pressure Relief Valve ....................................15

Filling the Water Heater ...........................................................16

Gas Piping ...............................................................................16

Sediment Traps ....................................................................... 17

Fuel Conversion Instructions from Natural Gas

to Propane (L.P.) Gas .........................................................17,18

Fuel Conversion Instructions from Propane (L.P.)

to Natural Gas .........................................................................19

LIGHTING & OPERATING LABEL ...............................................20

TEMPERATURE REGULATION ..................................................21

FOR YOUR INFORMATION ....................................................21-22

Start Up Conditions .................................................................21

Condensate ...................................................................21,22

Smoke/Odor .......................................................................22

Thermal Expansion ............................................................22

Strange Sounds ..................................................................22

Operational Conditions ............................................................22

Smelly Water ......................................................................22

“Air” in Hot Water Faucets ..................................................22

High Temperature Shut Off System ....................................22

PERIODIC MAINTENANCE ....................................................23-25

Venting System Inspection ......................................................23

Burner Inspection ....................................................................23

Burner Cleaning ...................................................................... 23

Housekeeping ......................................................................... 23

Anode Rod Inspection .............................................................24

Temperature-Pressure Relief Valve Operation ........................ 24

Draining ................................................................................... 24

Drain Valve Washer Replacement ...........................................24

Service .................................................................................... 25

LEAKAGE CHECKPOINTS ..........................................................25

TROUBLESHOOTING .................................................................26

REPAIR PARTS ............................................................................27

WARRANTY ............................................................................Insert

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

• NFPA - National Fire Protection Association

• ASME - American Society of Mechanical Engineers

• UL - Underwriters Laboratories Inc.

This gas-ﬁ red water heater is design certiﬁ ed by CSA INTERNATIONAL under American National Standard/CSA Standard for Gas Water Heaters for Manufactured Home Installation, ANSI Z21.10.1 • CSA 4.1 (current edition).

PREPARING FOR THE INSTALLATION

1. Read the “General Safety” section, page 3 of this manual ﬁ rst and then the entire manual carefully. If you don’t follow the 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 the installation, operation,

and maintenance of the gas-ﬁ 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 the proper operation of the water heater and your safety. Since we

cannot put everything on the ﬁ rst few pages, READ THE ENTIRE

MANUAL BEFORE ATTEMPTING TO INSTALL OR OPERATE THE WATER HEATER.

2. Instructions to Manufactured Home Manufacturers: The installation must conform with the Mobile Homes Industrialized

Building Construction standard CAN/CSA-Z240.4.1. Instruction for replacement installation: The installation must conform with these instructions and

the local code authority having jurisdiction. In addition,

installations shall comply with the Natural Gas and Propane

Installation Code (CAN/CSA-B149.1-current edition). This

publication is available from the Canadian Standards Association,

5060 Spectrum Way, Suite 100 Mississauga, Ontario,

Canada L4W 5N6.

3. 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.

4. 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 ﬁ 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.

TYPICAL INSTALLATION

GET TO KNOW YOUR WATER HEATER - GAS MODELS

A Vent Pipe B Securing Clamp C Anode (Not Shown) D Hot Water Outlet E Outlet F Roof Jack G Gas Supply H Manual Gas Shut-off Valve I Ground Joint Union

* INSTALL IN ACCORDANCE WITH LOCAL CODES.

* DRIP LEG AS REQUIRED BY LOCAL CODES.

TO VENT

TERMINATION

ON ROOF

J Drip Leg (Sediment Trap) K Manifold Door L Outer Door M Union N Inlet Water Shut-off Valve O Cold Water Inlet P Inlet Nipple Q Temperature-Pressure Relief Valve R Rating Plate

THERMOSTAT

SHIELD

(OPTIONAL)

S Flue Bafﬂ e T Gas Control Valve/Thermostat U Drain Valve V Pilot and Main Burner W Flue X Air Duct Assembly Y Metal Drain Pan Z Thermostat Shield (optional) ZZ Piezo Igniter

(T) GAS CONTROL VALVE/ THERMOSTAT

* ALL PIPING MATERIALS TO BE SUPPLIED BY CUSTOMERS.

(V) PILOT & MAIN BURNER

FIGURE 1.

TYPICAL INSTALLATION

* MIXING VALVE USAGE ** FOR CLARITY, METAL DRAIN PAN NOT SHOWN

FIGURE 2.

This appliance has been design certiﬁ ed as complying with American National Standard/CSA Standard ANSI Z21.10.1 • CSA 4. 1 for water heaters and is considered suitable for:

Water (Potable) Heating: All models are considered suitable for water (potable) heating.

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, 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 inﬁ rm, or physically/mentally handicapped. If anyone using hot water in your home ﬁ 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 satisﬁ es 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. Consult a Qualiﬁ ed Installer or Service Agency. Follow mixing valve manufacturer’s instructions for installation of the valves. Before changing the factory setting on the thermostat, read the “Temperature Regulation” section in this manual, see Figures 36 and 37.

LOCATING THE NEW WATER HEATER

FACTS TO CONSIDER ABOUT THE LOCATION

Whether replacing an old water heater or putting the water heater in a new location, the following critical points must be observed.

This manufactured home gas-ﬁ red water heater is for use in a manufactured home. You should carefully choose an indoor location for the new water heater, because the placement is a very important consideration for the safety of your occupants in the building and for the most economical use of the appliance. This water heater

is for use only in a manufactured home and not intended for outdoor installation.

This water heater has been designed and certiﬁ ed as a direct vent (sealed combustion) unit and no draft diverter is to be used.

Minimum clearances between the water heater and combustible and noncombustible construction are 0” from sides, 0” from back, 4” (10.16 cm) from front of jacket to closet door and 27” (68.58 cm) from top of jacket to combustible material. Minimum vent clearances: 6” (15.24 cm). Provide 24” (60.96 cm) front clearance for servicing and adequate clearance between the jacket top and ceiling for servicing the ﬂ ue area.

The combustion and ventilation air ﬂ ow must not be obstructed. Combustion air must be supplied from outside the manufactured

home by way of the furnished 3” diameter (30 Gallon [113.56 Liter] and 40 Gallon [151.42 Liter]) or 4” diameter (50 Gallon [189.27 Liter]) air intake duct assembly. A 3 1/2” (8.89 cm) diameter (30 Gallon [113.56 Liter] and 40 Gallon [151.42 Liter]) or 4 1/2” (11.436 cm) diameter (50 Gallon [189.27 Liter]) ﬂ oor opening below the water heater is required to accommodate the air intake duct assembly. Weight of the water heater on duct gasket seals the water heater to air intake duct assembly.

When a manufactured home is skirted, an air intake opening with a minimum free area of 32 square inches (81.28 square cm) must be provided in the skirt. If the opening is covered by louvers or screen, the total free area must be 32 square inches (81.28 square cm). Other gas ﬁ red appliance in the home will require additional free air openings; consult these manufacturers for correct sizing, see Figure 3.

and horizontal runs and have no more than 3 elbows. All horizontal runs require adequate support at 3 1/2 feet (106.68 cm) intervals., see Figure 4.

FIGURE 4.

The water heater should be secured to the ﬂ oor and to the wall of the enclosure with the mounting brackets provided. For bracket location refer to Securing Water Heater to Floor and Wall” in the “Installing the New Water heater” section.

FIGURE 3.

If the manufactured home is installed over a basement or crawlspace, combustion air must be supplied from outside the manufactured home. The combustion air intake piping can be 3” (7.62 cm) PVC for 30 Gallon (113.56 Liter) and 40 gallon (151.42 Liter) models and 4” (10.16 cm) PVC for 50 Gallon (189.27 Liter) models. The air intake piping cannot exceed a total of 30 feet (9.14 m) including vertical

Installation of the water heater must be accomplished in such a manner that if the tank or any connections should leak, the ﬂ 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 ﬂ oor. When such locations cannot be avoided, a suitable metal drain pan should be installed under the water heater. Metal drain pans are available at your local hardware store. Such a metal drain pan must have a minimum length and width of at least 2 inches (51 mm) greater that the water heater dimensions and must be piped to an adequate drain. The pan must not restrict combustion air ﬂ ow. When a metal drain pan is required, see installation instructions on page 9.

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 metal 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 metal 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 metal drain pan that trigger an alarm or turn off the incoming water to the water heater when leakage is detected.

• Sensors mounted in the metal drain pan that turn off the water supply to the entire home when water is detected in the metal 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 ﬂ ammable vapors which can be ignited by a gas water heater’s pilot light or main burner. The resulting ﬂ ashback and ﬁ re can cause death or serious burns to anyone in the area, as well as property damage. If installation in such areas is your only option, then the installation must be accomplished in a way that the pilot ﬂ ame and main burner ﬂ ame are elevated from the ﬂ oor at least 18 inches (45.7 cm). While this may reduce the chances of ﬂ ammable vapors, from a ﬂ oor spill being ignited, gasoline and other ﬂ ammable substances should never be stored or used in the same room or area containing a gas water heater or other open ﬂ ame or spark producing appliance. NOTE: Flammable vapors may be drawn by air currents from other areas of the structure to the appliance. Also, the water heater must be located and/or protected so it is not subject to physical damage by a moving vehicle.

A gas water heater cannot operate properly without the correct amount of air for combustion. Provide ventilation and combustion air by means of an air intake duct assembly as stated in “Water Heater Installation”. Never obstruct the ﬂ 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 ﬁ re or explosion and cause death, serious bodily injury, or property damage.

• Install water heater in accordance with the instruction manual and CAN/CSA B149.1-current edition (Natural Gas and Propane Installation Code) and all local/ provincial codes.

• To avoid injury, combustion and

ventilation air must be taken from outdoors.

• Do not place chemical vapor

emitting products near water heater.

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 ﬂ ammable in many cases, will also change to 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

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 inches (76.2 mm) in any direction, or if the appliance is installed in an alcove or closet, the entire ﬂ oor must be covered by the panel. Failure to heed this warning may result in a ﬁ re hazard.

• Do not obstruct water heater air intake with insulating blanket.

• Gas and carbon monoxide detec tors are available.

• Install water heater in accordance with the instruction manual.

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 the standby heat loss encountered with storage tank heaters. Your water heater meets or exceeds the minimum efﬁ ciency requirements 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 identiﬁ cation of components mentioned below, see Figure 1). Failure to follow these instructions can restrict the air ﬂ ow required for proper combustion, potentially resulting in ﬁ re, asphyxiation, serious personal injury or death.

• Do not apply insulation to the top of the water heater, as this will interfere with safe operation of the draft hood.

• Do not cover the outer door, thermostat or temperature & pressure relief valve.

• Do not allow insulation to come within 2” (50.8 mm) of the ﬂ oor to prevent blockage of combustion air ﬂ 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 ﬂ ow.

INSTALLING THE NEW WATER HEATER

WATER HEATER INSTALLATION

1. To locate the position of the 3 1/2” (8.89 cm) or 4 1/2” (11.43 cm) hole to be cut in the ﬂ oor, see Figures 5 and 6.

FIGURE 5.

2. If you have found that the water heater is being installed in an

FIGURE 6.

area which, if the water heater was to leak, would cause damage and have elected to install a metal drain pan refer to Figures 7, 8 and 9 on page 10. If you are not installing a drain pan go directly to the next step.

NOTE: Clearances from combustible or non combustible surface to jacket will change template dimensions.

FIGURE 7.

4. Set the water heater in place against the lip of the duct assembly as shown in Figure 11.

FIGURE 11.

5. Secure the water heater to the duct assembly using the screw provided.

NOTE: See pages 12 and 13 for installing an air intake through an outside wall when the manufactured home is located over a basement or crawl space.

SECURING WATER HEATER TO FLOOR AND WALL

The water heater must be secured to the ﬂ oor and to the wall of the enclosure with the three mounting brackets and screws packaged in the carton with the water heater. The two small brackets are used to attach the water heater to the ﬂ oor and the one large bracket is used to secure the top of the water heater to the wall.

FIGURE 8.

FIGURE 9.

3. Insert the duct assembly as shown in Figure 10 with lip facing forward, and using only nails, secure the duct assembly to the ﬂ oor.

Because of installation variances these brackets can be located at any points around the circumference of the jacket. When the bracket locations are determined using the 1/8 inch drill bit for a pattern, drill only through the outer jacket of the water heater. Then using the screws provided, secure the bracket to the water heater, ﬂ oor and wall, see Figure 12.

FIGURE 10.

FIGURE 12.

ROOF JACK INSTALLATION

ROOF JACK KIT MODELS VENT KIT- 12 INCH (30.48 cm) 9002964005, VENT KIT - 32 INCH (81.28 cm) 9002965005,

VENT KIT - 60 INCH (152.40 cm) 9002966005 AND VENT KIT - 95 INCH (241.30 cm) 9002967005

FIGURE 13.

1. Cut 5 1/2” (13.97 cm) diameter holes through the roof and ceiling directly in line with the ﬂ ue connection on top of the water heater. For a sloped roof, the roof hole may have to be enlarged to allow the roof jack to be installed vertically.

2. Telescope down the ﬂ ue pipe in the roof jack assembly to a length that will project at least 6 inches (15 cm) below the ﬁ nished ceiling before installing the roof jack assembly.

NOTE: Flue pipe joints have silicone seals that must remain in place. A soapy water solution sprayed around the seal area will enable the ﬂ ue pipe and outer pipe below to telescope more freely.

3. Telescope down the outer pipe of the roof jack assembly to a length that will project at least 2” (5.08 cm) below the ﬁ nished ceiling before installing the roof jack assembly, see Figure 14.

4. Ease the roof jack assembly through the roof and ceiling openings. The roof jack ﬂ ashing tilts up to 22.6° degrees for use on a sloping roof.

5. Use sealant or caulk on the roof to seal under ﬂ ashing of the roof jack assembly. Use roof nails or screws on wood construction or sheet metal screws on metal roofs (nails and screws not provided), see Figure 15.

FIGURE 15.

NOTE: An optional Roof jack Extension Pipe (9002588) is required

when the roof pitch is 5 1/2” (13.97 cm) or greater, or where local codes require the roof jack cap (outlet) terminate above the peak of the roof.

FIGURE 14.

6. Remove the paper backing from the 1 1/2” x 9 3/4” (3.81 cm x 24.77 cm) woven tape seal (found attached to the heater top) and apply the seal around the ﬂ ue collar of the water heater, see Figure 16 on page 12.

FIGURE 16.

7. Extend the ﬂ ue pipe down close to the water heater ﬂ ue collar, see Figure 17.

FIGURE 17.

3. Remove the screws which attach the wind bafﬂ e to the existing metal air intake vent pipe underneath the home. Discard the wind

bafﬂ e and screws, see Figure 19.

8. Slide the securing clamp over the bottom of the ﬂ ue pipe and pull the pipe down over the ﬂ ue collar. Locate vent securing clamp in top and secure clamp with sheet metal screw. Tighten nut and bolt clamp until ﬂ ue pipe is tight in clamp, see Figure 18.

FIGURE 18.

NOTE: All joints for vent piping between roof jack and water heater

are sealed from the manufacturer. No additional sealing of vent pipe is necessary.

MANUFACTURED HOME INSTALLED OVER BASEMENT OR CRAWLSPACE - AIR INTAKE THROUGH AN OUTSIDE WALL

ALL 30 AND 40 GALLON (113.56 AND 151.42 LITER) MODELS

3” (7.62 cm) PVC Schedule 40 intake air vent piping: Optional Kit No. 9002986005 contains a 3” (7.62 cm) PVC Schedule

40-45° vent cap with screen and two 3” (7.62 cm) wall collars.

ALL 50 GALLON (189.27 LITER) MODELS

4” (10.16 cm) PVC Schedule 40 intake air vent piping: Optional Kit no. 9002987005 contains a 4” (10.16 cm) PVC Schedule

40-45° vent cap with screen and two 4” (10.16 cm) wall collars.

ALL MODELS

1. PVC, ABS or CPVC Schedule 40 piping and ﬁ ttings are acceptable materials for the intake air vent system.

2. The intake air vent system must terminate horizontally to the outdoors.

FIGURE 19.

4. Attach a 3” (7.62 cm) or 4” (10.16 cm) PVC street elbow to the metal air intake vent using 3 sheet screws. Continue PVC piping to outside wall and terminate with vent cap and screen, see Figure 20.

3” (7.62 cm) size - 30 and 40 gallon (113.56 and 151.42 Liter) models. 4” (10.16 cm) size - 50 gallon (189.27 Liter) models.

See pages 13 and 14 for cementing instructions

FIGURE 20.

NOTE: Vent cap must be located a minimum of 12” (30.48 cm) above

the ground or anticipated snow level.

5. Vertical and horizontal runs must be securely supported at 3 1/2 foot (106.68 cm) intervals, see Figure 21.

FIGURE 21.

6. The intake air vent piping can be installed with no more than 3 elbows, see Figure 22.

FIGURE 22.

CUTTING OPENING THROUGH AN OUTSIDE WALL AND COLLAR INSTALLATION

Determine the location of the opening in the wall and cut a 3 3/4” (9.53 cm) hole (30 Gallon (113.56 Liter) & 40 Gallon (151.42 Liter)) or 4 3/4” (12.07 cm) hole (50 Gallon (189.27 Liter)) through an outside wall.

The 3” (7.62 cm) or 4” (10.16 cm) PVC, ABS or CPVC Schedule 40 vent pipe can be run from the water heater through the wall or from the wall to the water heater, whichever is most convenient. The vent pipe must extend a minimum of 1 1/2” (3.81 cm) through the exterior wall. Note that the inside collar must be slipped over the vent piping before locating the pipe through the wall. Before securing the inside and outside collars to the wall, use a silicone sealer between pipe and opening to insure a water and air tight seal, see Figure 23.

INSTALLATION SHOWING USE OF PVC, ABS OR CPVC PIPE

NOTE: Wall collars are for aesthetic purposes and are not required

for the heater to operate.

CEMENTING PVC, ABS OR CPVC PIPE AND FITTINGS

Read and observe all safety information printed on primer, cleaner, and cement containers.

Primer, cleaner, and cements are extremely ﬂ ammable. They are harmful or fatal if swallowed. The vapors are harmful. They may irritate eyes and skin and can be absorbed through the skin.

Always store primer, cleaner, and cements in cool, dry, well ventilated places. Keep containers closed. Use them in well ventilated areas. Wear impervious clothing while handling. Do not smoke, eat, or drink while handling. Wash thoroughly after handling and before eating. Wear eye protection when handling. If swallowed, drink water, do not induce vomitting, and call a physician or poison control center immediately. If inhaled, get fresh air and seek medical attention if ill feelings persist. In case of eye and skin contact, immediately ﬂ ush with plenty of water for 15 minuttes and seek medical attention if irritation persists. KEEP OUT OF REACH OF CHILDREN.

All primers, cleaners, and cements must meet all local codes and applicable standards of the American Society For Testing Materials Standards.

Before using primers, cleaners and cements, stir or shake, making sure contents are liquid. Do not use if found to be lumpy or jellylike.

Cut pipe ends squarely removing all burrs and dirt.1. Dry ﬁ t pipe and ﬁ ttings to be connected for proper ﬁ t.2. Clean pipe and ﬁ tting with primer/cleaner.3. Apply a thin coat of cement to ﬁ tting, avoiding puddling inside.4. Apply a liberal coat of cement to pipe leaving no voids.5. QUICKLY assemble parts while cement is ﬂ uid! If you wait too 6.

long, recoat pipes. Push pipe completely into socket of ﬁ tting, turning as it goes 7.

until it bottoms. Hold pipe and ﬁ tting together for 30 seconds. Then carefully 8.

clean off excess with a cloth. Allow connections a sufﬁ cient time to cure before distrurbing.

Remember that vent pipes must be adequately and securely 9. supported.

APPROXIMATE SETTING TIME FOR 2 1/2” (6.35 cm)

TO 4” (10.16 cm) PIPE JOINTS

TABLE 1:

MOVEMENT

OF JOINT

COMPLETE

SET

90°F (32.22°C) TO 150°F (65.56°C) 3/4 HR. 8 HRS.

50° (10.00°C) TO 90°F (32.22°C) 1 HR. 15 HRS.

0°F (-17.78°C) TO 50° (10.00°C) 1 1/3 HR. 18 HRS.

FIGURE 23.

WATER PIPING

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 inﬁ rm, or physically/mentally handicapped. If anyone using hot water in your home ﬁ 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 satisﬁ es 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, see Figure 2. Valves for reducing point of use temperature by mixing cold and hot water are also available. Consult a Qualiﬁ ed Installer or Service Agency. Follow manufacturer’s instructions for installation of the valves. Before changing the factory setting on the thermostat, read the “Temperature Regulation” section in this manual.

plumbing contractor. Contact the local water supplier and/or a service agency for assistance in controlling these situations.

NOTE: To protect against untimely corrosion of hot and cold water ﬁ ttings, it is strongly recommended that di-electric unions or couplings be installed on this water heater when connected to copper pipe.

Figure 24 shows the typical attachment of the water piping to the water heater. The water heater is equipped with 3/4 inch NPT water connections.

This water heater shall not be connected to any heating systems or component(s) used with a non-potable water heating appliance.

Toxic chemicals, such as those used for boiler treatment shall not be introduced into this system.

Water supply systems may, because of such events as high line pressure, frequent cut-offs, the effects of water hammer among others, have installed devices such as pressure reducing valves, check valves, back ﬂ ow preventers, etc. to control these types of problems. When these devices are not equipped with an internal by-pass, and no other measures are taken, the devices cause the water system to be closed. As water is heated, it expands (thermal expansion) and closed systems do not allow for the expansion of heated water.

The water within the water heater tank expands as it is heated and increases the pressure of the water system. If the relieving point of the water heater’s temperature-pressure relief valve is reached, the valve will relieve the excess pressure. The temperature-

pressure relief valve is not intended for the constant relief of thermal expansion. This is an unacceptable condition and must

be corrected. It is recommended that any devices installed which could create a

closed system have a by-pass and/or the system have an expansion tank to relieve the pressure built by thermal expansion in the water system. Expansion tanks are available for ordering through a local

FIGURE 24.

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 25.

2. Locate the slit running the length of the T&P relief valve insulation.

3. Spread the slit open and ﬁ t the insulation over the T&P relief valve. See Figure 25. 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. IMPORTANT: The insulation or tape should not block or cover the T&P relief valve drain opening. Also, the insulation or tape should not block or hinder access to the manual relief lever (Figure 25).

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 ﬂ ush with the water heater. Once seated, secure the insulation with duct tape.

7. Repeat steps 5 and 6 for the hot water (outlet) pipe.

8. Add additional sections of pipe insulation as needed.

T&P Relief Valve Drain Line

Manual Relief Lever

T&P Relief Valve Insulation

FIGURE 25.

TEMPERATURE-PRESSURE RELIEF VALVE

• Temperature-pressure relief valve must comply with ANSI Z21.22CSA 4.4 and ASME code.

• Properly sized temperature-relief valve must be installed in opening provided.

• Can result in overheating and excessive tank pressure.

• Can cause serious injury or death.

This heater is provided with a properly certified combination temperature - pressure relief valve by the manufacturer. The valve is certiﬁ ed by a nationally recognized testing laboratory that maintains periodic inspection of production of listed equipment of materials as meeting the requirements for Relief Valves and Automatic Gas Shut-off Devices for Hot Water Supply Systems, ANSI Z21.22 • CSA 4.4.

If replaced, the valve must meet the requirements of local codes, but not less than a combination temperature and pressure relief valve certiﬁ ed as indicated in the above paragraph. The valve must be marked with a maximum set pressure not to 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 input rate as shown on the model rating plate.

For safe operation of the water heater, the relief valve must not be removed from its designated opening nor plugged.

The temperature-pressure relief valve must be installed directly into the ﬁ tting of the water heater designed for the relief valve. Position the valve downward and provide tubing so that any discharge will exit only at any distance below the structural ﬂ oor and external to the building. In cold climates, it is recommended that the discharge pipe 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, see Figure 26.

No valve or other obstruction is to be placed between the relief valve and the tank. Do not connect tubing directly to discharge drain unless a 6 inch (15 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 quantities should circumstances demand. If the discharge pipe is not connected to a drain or other suitable means, the water ﬂ ow may cause property damage.

The Discharge Pipe:

• Shall not be smaller in size than the outlet pipe size of the valve, or have any reducing couplings or other restrictions.

• Shall not be plugged or blocked.

• Shall be of material listed for hot water distribution.

• Shall be installed so as to allow complete drainage of both the temperature-pressure relief valve, and the discharge pipe.

• Shall exit only at any distance below the structural ﬂ oor and external to the building. In cold climates, it is recommended that the discharge pipe be terminated at an adequate drain inside the building.

• Shall not have any valve between the relief valve and tank.

The temperature-pressure relief valve must be manually operated at least once a year. Caution should be taken to ensure that (1) no one is in front of or around the outlet of the temperature-pressure 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, and replace the temperature-pressure relief valve with a new one.

FIGURE 26.

FILLING THE WATER HEATER

Never use this water heater unless it is completely full of water. To prevent damage to the tank, the tank must be ﬁ lled with water. Water must ﬂ ow from the hot water faucet before turning “ON” gas to the water heater. To ﬁ ll the water heater with water:

1. Close the water heater drain valve by turning the handle to the right (clockwise). The drain valve is on the lower front of the 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 ﬁ lling of the tank, allow air to exit by opening the nearest hot water faucet. Allow water to run until a constant ﬂ ow is obtained. This will let air out of the water heater and the piping.

There must be:

• A readily accessible manual shut off valve in the gas supply line serving the water heater, and

• A drip leg (sediment trap) ahead of the gas control valve/ thermostat to help prevent dirt and foreign materials from entering the gas valve.

• A ﬂ 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 ﬂ ame. Rinse off soapy solution and wipe dry.

When installed at elevations above 4,500 feet (1371 m), input rating should be reduced at the rate of 4 percent for each additional 1,000 feet (305 m). This requires replacement of the burner orifice in accordance with the Natural Gas and Propane Installation Code (CAN/CSA B149.1-current edition). Contact your local gas supplier for further information.

Failure to replace the standard oriﬁ ce with a high altitude oriﬁ ce when installed could result in improper and inefﬁ cient 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 speciﬁ c changes which may be required in your area.

4. Check all water piping and connections for leaks. Repair as needed.

GAS PIPING

Make sure the gas supplied is the same type listed on the model rating plate. The inlet gas pressure must not exceed 10.5” W.C. for natural gas and 13” W.C. for propane (L.P.) gas. The minimum inlet gas pressure shown on the rating plate is that which will permit ﬁ ring at rated input.

If the gas control valve/thermostat is subjected to pressures exceeding 1/2 pound per square inch (3.5 kPa), the damage could result in a ﬁ re or explosion from leaking gas.

Use pipe joint compound or teﬂ on 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 shall 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 shall 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 the gas piping to the gas control valve/thermostat of the water heater can be accomplished by either of the two methods shown in Figures 27, 28 and 29.

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 sufﬁ cient size must be run to the water heater. Consult the current edition of Natural Gas and Propane Installation Code (CAN/CSA B149.1) and your gas supplier concerning pipe size.

SEDIMENT TRAPS

A sediment trap shall be installed as close to the inlet of the water heater as practical at the time of water heater installation. The sediment trap shall be either a tee ﬁ tting with a capped nipple in the bottom outlet or other device recognized as an effective sediment trap. If a tee ﬁ tting is used, it shall be installed in conformance with one of the methods of installation shown in Figures 27, 28 and 29.

accordance with the “Gas Piping” section. Refer to the current edition of the Natural Gas and Propane Installation Code (CAN/CSA B149.1-current edition).

FUEL CONVERSION INSTRUCTIONS FROM NATURAL GAS TO PROPANE (L.P.) GAS

This water heater has been factory equipped to operate with the type gas indicated in the “EQUIPPED FOR” area of the model rating plate located near the gas control valve/thermostat. The indicated gas may be either Natural or Propane (L.P.). By following the conversion instructions in this manual or the instructions near the gas control valve/thermostat, the water heater must be converted if it is to be used with the opposite gas. DO NOT USE THIS WATER HEATER WITH ANY GAS OTHER THAN THE ONE LISTED ON THE MODEL RATING PLATE. Failure to use the correct gas can cause problems which can result in DEATH, SERIOUS BODILY INJURY, OR PROPERTY DAMAGE. If you have any questions or doubts consult your gas supplier or gas company.

Read and follow detailed conversion instructions located on the water heater and also in the instruction manual in their entirety before starting the conversion.

Conversion kit with necessary parts are in a bag attached to the drain valve.

FOR 30 GALLON HEATER:

Oriﬁ ce size: #40 for Natural / #52 for Propane (L.P.), if converted - Propane Rate: 30,000 BTU.

FIGURE 27. GAS PIPING WITH FLEXIBLE CONNECTOR.

FIGURE 28. GAS PIPING WITH ALL

BLACK IRON PIPE TO GAS CONTROL.

FIGURE 29. ALTERNATIVE SEDIMENT TRAP LOCATION

Contaminants in the gas lines may cause improper operation of the gas control valve/thermostat that may result in ﬁ 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 drip leg (sometimes called a sediment trap) must be incorporated in the piping. The drip leg must be readily accessible. Install in

FOR 40 GALLON HEATER:

Oriﬁ ce size: #38 for Natural / #51 for Propane (L.P.), if converted - Propane Rate: 32,000 BTU.

FOR 50 GALLON HEATER:

Oriﬁ ce size: #35 for Natural / #51 for Propane (L.P.), if converted - Propane Rate: 38,000 BTU.

Step 1. Turn gas control knob “A” to “PILOT”. Depress and turn

“OFF”, see Figure 30 page 19.

Step 2. Remove outer and inner access doors from water

heater.

Step 3. Remove burner assembly from water heater control

by ﬁ rst removing 6 screws holding inner door to heater, then loosening 3/4” nut “H” holding burner assembly to control, see ﬁ gures 31 and 32. Loosen pilot tube nut “J” and thermocouple nut “K” at control. Disconnect wire to Piezo Igniter.

Step 4. Remove screws “D” disengaging manifold from burner,

see Figure 33 page 19.

Step 5. Remove oriﬁ ce “E”, see Figure 34 page 19 using 3/8”

wrench. Install oriﬁ ce marked “L.P.” found in the bag into manifold. Tighten securely. Secure burner to manifold with screws “D”.

Step 6. Loosen pilot tube nut “F”, see Figure 34 page 19. Remove

oriﬁ ce “G” and replace with red colored oriﬁ ce found in bag. Reinstall nut “F” and tighten securely.

Step 7. Make sure all connections are tightened securely, and

reinstall burner assembly into water heater. Position end of manifold inside bracket as shown in Figure 33 page

19. Reinstall manifold into control and tighten 3/4” nut (“H”) securely. Recheck to see that end of manifold is still inside bracket as shown in Figure 33 page 19. Reinstall pilot tubing and thermocouple into control, see Figure 31 page 19. Connect wire to Piezo Igniter. Reinstall inner door using the 6 screws removed in Step 3.

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