John Wood Envirosense Power Direct Vent User Manual

RESIDENTIAL GAS WATER HEATERS

CANADIAN MANUAL

Instruction Manual

POWER VENT/POWER DIRECT VENT GAS MODELS

WITH HOT SURFACE IGNITION

• 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, CALL THE TECHNICAL SUPPORT PHONE NUMBER SHOWN ON THE WATER HEATER LABELING.

KEEP THIS MANUAL IN THE POCKET ON HEATER FOR FUTURE REFERENCE

PRINTED 0609 316312-000

WHENEVER MAINTENANCE ADJUSTMENT OR SERVICE IS REQUIRED.

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.

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

• Qualied Installer: A qualied installer must have ability equivalent to a licensed tradesman in the elds of plumbing,

air supply, venting and gas supply, including a thorough understanding of the requirements of the Natural Gas and Propane Installation Code as it relates to the installation of gas red water heaters. The qualied installer must also be familiar with the design features of water heaters, and have a thorough understanding of this instruction manual.

• Service Agency: A service agency also must have ability equivalent to a licensed tradesman in the elds of plumbing,

air supply, venting and gas supply, including a thorough understanding of the requirements of the Natural Gas and Propane Installation Code as it relates to the installation of gas red water heaters. The service agency 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 ............................................................5

INTRODUCTION ......................................................................5

Preparing for the Installation .............................................5

Get to Know Your Water Heater ........................................6

INSTALLATION CONSIDERATIONS .......................................7

Rough In Dimensions........................................................7

Water Piping - Mixing Valve Usage ...................................8

Facts to Consider About Location .....................................9

Insulation Blankets ..........................................................10

Combustion Air and Ventilation .......................................10

Appliances in Unconned Spaces ...........................10

Appliances in Conned Spaces ..............................10

INSTALLING THE WATER HEATER ..................................... 12

Chemical Vapor Corrosion ..............................................12

Water Piping ...................................................................12

Temperature-Pressure Relief Valve ................................13

Gas Piping ......................................................................14

Sediment Traps ...............................................................15

Filling the Water Heater ..................................................15

Venting ............................................................................15

Vent Pipe Termination ............................................... 15-16

Planning the Vent System ...............................................18

Condensate.....................................................................18

Installation of Vent System..............................................19

Vent Terminal Installation, Sidewall .................................19

Sequence of Installations, Figure 18A ............................19

Direct Venting..................................................................19

Direct Vent Terminal Installation ......................................19

Installation Sequence......................................................20

Vertical Vent Terminal Installation ...................................20

Installation of Vent System, Sidewall ..............................21

Installation of Vertical Vent System .................................21

Vent Pipe Preparation .....................................................25

Controls and Switches ....................................................27

Power Vent Wiring Schematic.........................................28

LIGHTING & OPERATING LABEL .........................................29

TEMPERATURE REGULATION ............................................30

USING THE ELECTRONIC CONTROLLER ..........................31

FOR YOUR INFORMATION ...................................................35

Start Up Conditions

Smoke/Odor ............................................................35

Thermal Expansion .................................................35

Strange Sounds ......................................................35

Operational Conditions ...................................................35

Smelly Water ...........................................................35

“Air” in Hot Water Faucets .......................................35

PERIODIC MAINTENANCE ...................................................36

Venting System Inspection..............................................36

Burner Operation and Inspection ....................................36

Burner Cleaning ..............................................................36

Housekeeping .................................................................36

Anode Rod Inspection.....................................................37

Temperature-Pressure Relief Valve Operation ...............37

Draining...........................................................................37

Service ............................................................................38

LEAKAGE CHECKPOINTS ....................................................38

TROUBLESHOOTING ...........................................................39

NOTES ...................................................................................40

WARRANTY ...........................................................................41

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

• GAMA - Gas Appliance Manufacturer’s Association

• UL - Underwriters Laboratories Inc.

This gas-red water heater is design certied by Underwriters Laboratories Inc. under American National Standard/CSA Standard for Gas Water Heaters ANSI Z21.10.3 • CSA 4.3 (current edition).

PREPARING FOR THE INSTALLATION

1. Read the “General Safety” section, page 3 and 4 of this manual 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-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 rst few pages, READ THE ENTIRE

MANUAL BEFORE ATTEMPTING TO INSTALL OR OPERATE THE WATER HEATER.

2. The installation must conform with these instructions and the local code authority having jurisdiction. In the absence of local codes, installations shall comply with the Natural Gas and Propane Installation Code CAN/CSA B149.1 and the Canadian Electrical Code CAN/CSA C22.1. These publications are available from the Canadian Standards Association, 5060 Spectrum Way, Suite 100, Mississauga, Ontario, Canada L4W 5N6.

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 “Facts to Consider About Location” section in this manual.

GET TO KNOW YOUR WATER HEATER - GAS MODELS

A Control Assembly B Blocked Inlet Switch C Blocked Outlet Switch D Fan Prover Switch E Blower Assembly F Burner Assembly G Flame Sensor H Hot Surface Igniter I Junction Box J Gas Valve Assembly K Display Board L Top Plastic Enclosure

M Display Enclosure ** N Exhaust Elbow Assembly ** O Condensate Tubing P Off/On Switch Q Display Label R Hot Water Outlet *S Electrical Outlet (120VAC) T Gas Supply U Main Manual Gas Shutoff Valve V Union W Inlet Water Shutoff Valve X Cold Water Inlet

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.

Y Inlet Dip Tube Z T/P Relief Valve AA Rating Plate BB Labels CC Drain Valve ** DD Vent Terminal EE Metal Drain Pan FF Anode GG Insulation HH Upper Temperature Probe II Access Door

VACUUM RELIEF

VALVE

*INSTALL PER

LOCAL CODES

ACCESS PANEL

Caution:

This access panel covers a 2” NPT plug that was required during the manufacturing of this water heater. This 2” NPT ange is not a cleanout tting, removing the 2” NPT plug and using this tting as a cleanout could void your warranty.

* CAUTION HARNESS HAS 120 VAC. IN OPERATION. ** See “Planning the Vent System,” “Installation of Vent System” and “Condensate” for more information.

FIGURE 1.

INSTALLATION CONSIDERATIONS

ROUGH IN DIMENSIONS

FIGURE 1A.

Rough-In-Dimensions

Model Units A B C D E F

Inches 68.50 49.25 22.00 15.75 3.00 8.00

100

Top/Side Inlet and Outlet: 3/4” NPT Gas Inlet: 1/2” NPT

Capacity, Gas and Electrical Characteristics

Model

All models - Maximum Supply Pressure: 14 inches W.C. (3.48kPa) Minimum Supply Pressure for Natural Gas: 3.50” (.87kPa) Minimum Supply Pressure for Propane Gas: 8.00” (1.99kPa) Minimum pressure must be maintained under both load and no load (dynamic and static) conditions.

Recovery Capacities - U.S. Gallons/Hr. and Liters/Hr. at Temperature Rise Indicated

Model

Recovery capacity based on 96% thermal efciency

cm 174 125.09 55.88 40.00 7.62 20.32

Approximate Capacity Manifold Pressure Electrical Characteristics

U.S. Gals. Liters Gas Type “WC kPA Volts/Hz Amperes

100 50 189 Nat./LP 0” 0” 120/60 <5

Input Recovery Capacities

Rating

(Btu/hr)

100 100,000 29.3

Rating

(kW)

Temp.

Rise

F 30 40 50 60 70 80 90 100 110 120 130 140

C 17 22 28 33 39 44 50 56 61 67 72 78

GPH 387 291 233 194 166 145 129 116 106 97 90 83

LPH 1465 1102 882 734 628 549 488 439 401 367 341 314

WATER PIPING - MIXING VALVE USAGE

* 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 specic installation. Otherwise (as with all connections) check for leaks while lling the tank with water and after completing the installation.

FIGURE 2.

This appliance has been design certified as complying with American National Standard/CSA Standard for water heaters and is considered suitable for:

Water (Potable) Heating and Space Heating: All models are considered suitable for water (potable) heating and space 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, and the physically or developmentally disabled. If anyone using hot water from this heater fits 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 satisfies 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. Mixing valves are available at plumbing supply or hardware stores. Consult a Qualified 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.

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 metal 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 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 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 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 (VA PORS) ARE LIK ELY TO BE PRESENT OR STORE D (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.

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

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 the 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 the 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 the thermostats, drain valve and relief valve.

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.

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.

COMBUSTION AIR AND VENTILATION

A gas water heater cannot operate properly without the correct amount of air for combustion. Do not install in a conned area such as a closet, unless you provide air as shown in the “Facts to Consider About Location” 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.

FIGURE 3. FIGURE 4.

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 the 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 identication 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.

• 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

FIGURE 5.

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 (s) be installed direct vent so that all air for combustion and ventilation is taken from outdoors.

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.

APPLIANCES IN UNCONFINED SPACES

UNCONFINED SPACE is space whose volume is not less than

50 cubic feet per 1,000 Btu per hour (4.8 cubic meters per kW) of the aggregate input rating of all appliances installed in that 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 unconned space.

In unconned spaces in buildings, inltration may be adequate to provide air for combustion, ventilation and dilution of ue gases. However, in buildings of tight construction (for example, weather stripping, heavily insulated, caulked, vapor barrier, etc.), additional air may need to be provided using the methods described in “Appliances in Conned Space” that follows.”

APPLIANCES IN CONFINED SPACES

CONFINED SPACE is a space whose volume is less than 50 cubic

feet per 1,000 Btu per hour (4.8 cm per kW) of the aggregate input rating of all appliances installed in that space.

When drawing combustion air from inside a conventionally constructed building to a confined space, such a space shall be provided with

two permanent openings. ONE WITHIN 12 INCHES (30 cm) OF THE ENCLOSURE TOP AND ONE WITHIN 12 INCHES (30 cm) OF THE ENCLOSURE BOTTOM. Each opening shall have

a free area of one square inch per 1000 Btu/hr (22 cm2/kW) of the total input of all appliances in the enclosure, but not less than 100 square inches (645 cm

If the conned space is within a building of tight construction, air for combustion and ventilation must be obtained from outdoors. When directly communicating with the outdoors or communicating through vertical ducts, two permanent openings, located in the above manner, shall be provided. Each opening shall have a free area of not less than one square inch per 4000 Btu/hr (5.5 cm

/kW) of total input of all appliances in the enclosure. If horizontal ducts are used, each opening shall have a free area of not less than one square inch per 2000 Btu/ hr (11cm

/kW) of the total input of all appliances in the enclosure.

A. ALL AIR FROM INSIDE BUILDINGS: (See Figure 5 and 6) The conned space shall be provided with two permanent openings

communicating directly with an additional room(s) of sufcient volume so that the combined volume of all spaces meets the criteria for an unconned space. The total input of all gas utilization equipment installed in the combined space shall be considered in making this determination. Each opening shall have a minimum free area of one square inch per 1,000 Btu per hour (22 cm utilization

inches (645 cm

equipment in the conned space, but not less than 100 square

). One opening shall commence within 12 inches

/kW) of the total input rating of all gas

(30 cm) of the top and one commencing within 12 inches (30 cm) of the bottom of the enclosures.

Btu per hour (11 cm2/kW)) of total input rating of all equipment in the enclosure, see Figure 9.

FIGURE 8.

4. When ducts are used, they shall be of the same cross-sectional area as the free area of the openings to which they connect. The minimum short side dimension of rectangular air ducts shall not be less than 3 inches (7.6 cm), see Figure 9.

FIGURE 6.

B. ALL AIR FROM OUTDOORS: (See Figures 7, 8 and 9)

The conned space shall be provided with two permanent openings,

one commencing within 12 inches (30 cm) of the top and one commencing within 12 inches (30 cm) from the bottom of the enclosure. The openings shall communicate directly, or by ducts, with the outdoors or spaces (crawl or attic) that freely communicate with the outdoors.

1. Wh en di re ct ly co mm un ic ati ng wi th th e o utdo or s, eac h o pe ni ng s ha ll ha ve a minimum free area of 1 square inch per 4,000 Btu per hour (5.5 cm2/kW) of total input rating of all equipment in the enclosure, see Figure 7.

FIGURE 7.

2. When communicating with the outdoors through vertical ducts, each opening shall have a minimum free area of 1 square inch per 4,000 Btu per hour (5.5 cm2/kW) of total input rating of all equipment in the enclosure, see Figure 8.

3. When communicating with the outdoors through horizontal ducts, each opening shall have a minimum free area of 1 square inch per 2,000

FIGURE 9.

5. Alternatively a single permanent opening may be used when communicating directly with the outdoors, or with spaces that freely communicate with the outdoors. The opening shall have a minimum free area of 1 square inch per 3,000 BTU per hour (8.3 cm2/kW) of total input rating of all equipment in enclosure. See Figure 9A.

FIGURE 9A.

6. Louvers and Grilles: In calculating free area, consideration shall be given to

the blocking effect of louvers, grilles or s protecting openings. Screens used shall not be smaller than 1/4 inch (6.4 mm) mesh. If the free area through a design of louver or grille is known, it should be used in calculating the size opening required to provide the free area specied. If the design and free area is not known, it may be assumed that wood louvers will be 20-25 percent free area and metal louvers and grilles will have 60-75 percent free area. Louvers and grilles shall be xed in the open position or interlocked with the equipment so that they are opened automatically during equipment operation.

7. Special Conditions Created by Mechanical Exhausting or Fireplaces: operation of exhaust fans, ventilation systems, clothes dryers or replaces may create conditions requiring special attention to avoid unsatisfactory operation of installed gas utilization equipment.

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

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.

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 temperaturepressure relief valve operation: water discharged from the 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 the constant relief of thermal expansion.

A properly sized thermal expansion tank should be installed on all closed systems to control the harmful effects of thermal expansion..

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 physically or developmentally disabled. 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 the lowest possible temperature setting that satis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 Quali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.

This water heater shall 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 shall be suitable for use with potable water.

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

When the system requires water for space heating at temperatures higher than required for domestic water purposes, a tempering valve must be installed. Please refer to Figure 2 for suggested piping arrangement.

FIGURE 10.

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, see Figure 2 also.

Figures 2 and 10 show the typical attachment of the water piping to the water heater. The water heater is equipped with 3/4 inch NPT water connections.

If replaced, the valve must meet the requirements of local codes, but not less than a combination temperature and pressure relief valve certied as indicated in the above paragraph.

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.

T & P Valve and Pipe Insulation (if supplied)

Remove insulation for T & P valve and pipe connections from carton.

FIGURE 11.

Fit pipe insulation over the incoming cold water line and the hot water line. Make sure that the insulation is against the top cover of the heater.Fit T & P valve insulation over valve. Make sure that the insulation does not interfere with the lever of the T & P valve.

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 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 fitting of the water heater designed for the relief valve. Position the valve downward and provide tubing so that any discharge will exit only within 6 inches (15.2 cm) above, or at any distance below the structural floor. 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 Figures 10.

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” (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 quantities should circumstances demand. If the discharge pipe is not connected to a drain or other suitable means, the water flow may cause property damage.

Btu/hr input rate as shown on the water heater’s

Secure all insulation using tape.

TEMPERATURE-PRESSURE RELIEF VALVE

This heater is provided with a properly certified combination temperature - pressure relief valve by the manufacturer.

The Discharge Pipe:

• 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 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 between the relief valve and tank.

The valve is certi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 for Hot Water Supply Systems, ANSI Z21.22 • CSA 4.4, and the code requirements of ASME.

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