Bradford White DH-75T-60FB-3N Light Duty Direct Vent Gas Instruction manual

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Bradford White DH-75T-60FB-3N Light Duty Direct Vent Gas Instruction manual | Manualzz

DIRECT VENT GAS WATER HEATER

A Spanish language version of these instructions is available by contacting the company listed on the rating plate.

La versión espãnola de estas instrucciones se puede obtener al escribirle a la fábrica cuyo nombre aparece en la placa de especificaciones.

HIGH INPUT DIRECT VENT

INSTALLATION & OPERATING

INSTRUCTION MANUAL

WARNING:

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

FOR YOUR SAFETY

Do not store or use gasoline or other flammable, combustible, or corrosive vapors and liquids in the vicinity of this or any other appliance.

WHAT TO DO IF YOU SMELL GAS

Do not try to light any appliance.

Do not touch any electrical switch; do not use any

phone in your building.

Immediately call your gas supplier from a neighbor’s

phone. Follow the gas supplier's instructions.

If you cannot reach your gas supplier, call the fire

department.

Installation and service must be performed by a qualified installer, service agency or the gas supplier.

For your family’s comfort, safety and convenience, it is recommended this water heater be installed and serviced by a plumbing professional.

238-42498-00K REV 07/07

CONGRATULATIONS!

You have just purchased one of the finest water heaters on the market today!

This installation, operation and instruction manual will explain in detail the installation and maintenance of your new Direct Vent Gas Water Heater. The Manufacturer strongly recommends that you contact a plumbing professional for the installation of this water heater.

We require that you carefully read this manual, as well as the enclosed warranty, and refer to it when questions arise. If you have any specific questions concerning your warranty, please consult the plumbing professional from whom your water heater was purchased. For your records we recommend that you write the model, serial number and installation date of your water heater in the maintenance section in the back of this manual.

This manual should be kept with the water heater.

2

TABLE OF CONTENTS

Page

GENERAL INFORMATION ..................................................... 4

INSTALLATION

..............................................................................5

Locating The Water Heater ........................................................ 5

Minimum Clearances.................................................................. 8

Optional Direct Vent-Air Intake Terminal Guard ...................... 8

Venting......................................................................................... 12

Horizontal and Vertical Vent-Air Intake Lengths ..................... 15

Vent-Air Intake System Installation........................................... 17

Water Connections ..................................................................... 25

Gas Connections ........................................................................ 29

GENERAL OPERATION ........................................................

30

Lighting and Shutdown Instructions ........................................ 31

Thermostat Adjustment ............................................................. 32

Burner Flame Check................................................................... 33

MAINTENANCE

............................................................................ 34

PARTS LIST

.................................................................................. 37

PARTS LIST DRAWINGS

Direct Vent Water Heater............................................................ 38

Vent-Air Intake Kits..................................................................... 39

INSTALLATIONS FOR POTABLE WATER AND SPACE

HEATING ...............................................................................

40

3

GENERAL INFORMATION

This gas-fired water heater’s design is certified by CSA International under the American National Standard Z21.10.1 - (as indicated on the rating plate) and CSA 4.1-M - (as indicated on the rating plate).

This water heater must be installed in accordance with local codes or, in the absence of local codes, the National Fuel Gas Code, ANSI Z223.1-Latest

Edition) and/or in Canada CAN/CGA B149 Installation Codes (Latest

Editions). The warranty for this water heater is in effect only when the water heater is installed, adjusted, and operated in accordance with these

Installation and Operating Instructions. The manufacturer will not be held liable for any damage resulting from alteration and/or failure to comply with these instructions.

This water heater is not design certified for installation in a mobile home.

Such an installation may create a hazardous condition and will nullify the warranty.

This water heater has been designed and certified for the purpose of heating potable water. The installation and use of this water heater for any purpose other than the heating of potable water may cause damage to the water heater and create a hazardous condition and nullify the warranty.

CAUTION

Incorrect operation of this appliance may create a hazard to life and property and will nullify the warranty.

Do not use this appliance if any part has been submerged in water. You should contact a qualified service technician to inspect the appliance and to replace any part of the control system including the combination gas control, which has been submerged in water.

DANGER

Do not store or use gasoline or other flammable, combustible, or corrosive vapors and liquids in the vicinity of this or any other appliance.

IMPORTANT

Before proceeding, please inspect the water heater and its components for possible damage. DO NOT install any damaged components. If damage is evident then please contact the supplier where the water heater was purchased or the manufacturer listed on the rating plate for replacement parts.

Make sure that you check the rating plate and combination gas control on the water heater to be certain that the type of gas being supplied corresponds with the marking on the rating plate and combination gas control.

4

General Information continued-

A sacrificial anode is used to extend tank life. The removal of this anode, for any reason, will nullify the warranty. In areas where water is unusually active, an odor may occur at the hot water faucet due to a reaction between the sacrificial anode and the impurities in the water. If this should happen, an alternative anode may be purchased from the supplier that installed this water heater. This will minimize the odor while protecting the tank.

Additionally, the water heater should be flushed with appropriate dissolvers to eliminate any bacteria.

INSTALLATION

LOCATING THE WATER HEATER

WARNING

Water heaters are heat-producing appliances. To avoid damage or injury, do not store materials against the water heater or vent-air intake system.

Use proper care to avoid unnecessary contact (especially by children) with the water heater and vent-air intake components. UNDER NO

CIRCUMSTANCES SHALL FLAMMABLE MATERIALS, SUCH AS

GASOLINE OR PAINT THINNER BE USED OR STORED IN THE

VICINITY OF THIS WATER HEATER, VENT-AIR INTAKE SYSTEM OR IN

ANY LOCATION FROM WHICH FUMES COULD REACH THE WATER

HEATER OR VENT-AIR INTAKE SYSTEM.

DO NOT install the water heater in any location where gasoline or flammable vapors are likely to be present.

Water Heaters in residential garages shall be installed so that all burner(s) and burner ignition device(s) are located not less than 18 inches (46 cm) above the floor and shall be located, or protected, to avoid physical damage. For other installations refer to local codes. In the absence of local codes, the water heater shall be installed in compliance with the National Fuel Gas Code, ANSI Z223.1 - (Latest

Edition) and/or in Canada, CAN/CGA B149 Installation Codes (Latest

Editions).

The location of this water heater is of the utmost importance. Before installing this water heater, read the installation section of these instructions.

After reading these installation and operating instructions, select a location for the water heater where the floor is level and is easily accessible to gas and water supply lines. DO NOT locate the water heater where water

lines could be subjected to freezing temperatures

. Make sure the cold

water pipes are not located directly above the gas control so that condensate during humid weather does not drip on the controls

.

This water heater MUST be installed indoors out of the wind and weather.

5

Installation (Locating The Water Heater) continued-

Note: For California installation this water heater must be braced, anchored, or strapped to avoid falling or moving during an earthquake.

See instructions for correct installation procedures. Instructions may be obtained from California Office of the State Architect, 400 P Street,

Sacramento, CA 95814.

Water heater corrosion and component failure can be caused by the heating and breakdown of airborne chemical vapors. Examples of some typical compounds that are potentially corrosive are: spray can propellants, cleaning solvents, refrigerator and air conditioning refrigerants, swimming pool chemicals, calcium and sodium chloride, waxes and process chemicals.

These materials are corrosive at very low concentration levels with little or no odor to reveal their presence. NOTE: DAMAGE TO THE WATER

HEATER CAUSED BY EXPOSURE TO CORROSIVE VAPORS IS NOT

COVERED BY THE WARRANTY. DO NOT OPERATE THE WATER

HEATER IF EXPOSURE HAS OR WILL OCCUR. DO NOT STORE ANY

POTENTIALLY CORROSIVE COMPOUNDS IN THE VICINITY OF THE

WATER HEATER.

WARNING

Liquefied petroleum gases/propane gas are heavier than air and will remain at floor level if there is a leak. Basements, crawl spaces, closets and areas below ground level will serve as pockets for accumulation of leaking gas. Before lighting, smell all around the appliance area for gas. Be sure to smell next to the floor.

IF YOU SMELL GAS:

Do not try to light any appliance.

Do not touch any electric switch; do not use any

telephone in your building.

Immediately call your gas supplier from a neighbor’s

telephone. Follow the gas supplier’s instructions.

If you cannot reach your gas supplier, call the fire

department.

DO NOT OPERATE APPLIANCE UNTIL THE LEAKAGE IS

CORRECTED!

6

Installation (Locating The Water Heater) continued-

WARNING

DO NOT ATTEMPT TO LIGHT ANY GAS APPLIANCE IF YOU ARE

NOT CERTAIN OF THE FOLLOWING:

Liquefied petroleum gases/propane gas and natural gas have

an odorant added by the gas supplier that aids in the detection of the gas.

Most people recognize this odor as a “sulfur” or “rotten egg”

smell.

Other conditions, such as “odorant fade” can cause the

odorant to diminish in intensity, or ”fade”, and not be as readily detectable.

If you have a diminished sense of smell, or are in any way unsure

of the presence of gas, immediately contact your gas supplier from a neighbor’s telephone.

Gas detectors are available. Contact your gas supplier, or

plumbing professional, for more information.

The water heater must be located close enough to the outside wall to keep the venting distance within the maximum distance described in the installation instructions. Note: The direct vent-air intake terminal must

be installed on a vertical wall.

Read the venting section in this installation instruction manual before locating the water heater.

This water heater must be located in an area where leakage of the tank or water line connections and the combination temperature and pressure relief valve will not result in damage to the area adjacent to the water heater or to lower floors of the structure. When such locations cannot be avoided, a suitable drain pan, adequately drained, must be installed under the water heater. The pan must not restrict access to the burner opening. The drain pan must have a minimum length and width of at least 4 in. (10.2 cm) greater than the diameter of the water heater and must not restrict proper combustion air flow to the water heater. The drain pan, as described above, can be purchased from your plumbing professional. The drain pan must be piped to an adequate drain. The piping must be at least 3/4 inch (1.9 cm) in diameter and pitched for proper drainage.

It is recommended that a minimum clearance of four (4) inches (10.2 cm) be provided on the side of the water heater for servicing and maintenance of the combination temperature and pressure relief valve.

To comply with NSF requirements this water heater is to be: a) Sealed to the floor with sealant, in a smooth and easily cleanable way, or b) Installed with an optional leg kit that includes legs and/or extensions that provide a minimum clearance of 6” beneath the water heater.

7

MINIMUM CLEARANCES

WARNING

Failure to adhere to these installation and operating instructions may create a hazard to life and property and will nullify the warranty.

This installation shall allow access to the front of the water heater and adequate clearance shall be provided for servicing and operating this water heater. The water heater may be installed on either a combustible or non-combustible floor. If the water heater is to be installed directly on carpeting, it shall be installed on top of a metal or wood panel extending beyond the full width and depth of the appliance by at least three (3) inches

(7.6 cm)

in any direction or, if the appliance is to be installed in an alcove or closet, the entire floor shall be covered by the panel. The minimum clearances to combustibles for this water heater is: zero (0) inch (0 cm) from the sides and rear, four (4) inches (10.2 cm) from the front of the jacket, zero

(0) inch (0 cm) from the plenum, zero (0) inch (0 cm) from the air intake elbow and telescopic tubes and twelve (12) inches (30.5 cm) from the direct vent-air intake terminal. (See Figure 1). Refer to figure 1B for front to back dimensions of the water heater for installations in a closet.

When two direct vent water heaters are installed in a closet and the installation situation requires the vent terminals to be vertically aligned, then the clearances between the vent terminals must be a minimum of 9” for the

50 gallon model and 12” for the 65 and 75 gallon models. Refer to figure 2.

OPTIONAL DIRECT VENT-AIR INTAKE TERMINAL GUARD

WARNING

The direct vent-air intake terminal is HOT while the water heater is in operation. Do not touch. Keep children, combustibles, gasoline and other liquids having flammable vapors away.

It is recommended that a vent-air intake terminal guard be installed when the vent-air intake terminal is located where it can be touched accidentally, or accessed by children. (See Figure 3).

A chain link or louvered fence may be used instead of the vent-air intake terminal guard. Maintain proper clearances as specified in this instruction manual to the vent-air intake terminal. (See Figure 4).

8

Installation (Minimum Clearances) continued-

Figure 1A.

9

Installation (Minimum Clearances) continued-

Figure 1B.

Figure 2.

10

Installation (Minimum Clearances) continued-

Figure 3.

Figure 4.

11

VENTING

This is a Direct Vent Gas Water Heater where all air for combustion is obtained from the outside atmosphere and all flue gases are discharged to the outside atmosphere.

WARNING

The vent-air intake system must be properly installed. Failure to properly install the vent-air intake system properly could result in property damage, personal injury or death.

DO NOT install any damaged vent-air intake system components.

Contact the manufacturer of the water heater for replacement parts.

Note:

Provide protection of the building materials from degradation by flue gases from the direct vent-air intake terminal.

A=

B=

C=

D=

E=

12 inches (30 cm) *a

12 inches (30 cm) *a

US Installations

2

12 inches (30 cm) *a

12 inches (30 cm) *a

Figure 5.

Direct Vent Terminal Clearances

Canadian

Installations

1

Clearance above grade, veranda, porch, deck or balcony

Clearance to widow or door that may be opened

12 inches (30 cm)

12 inches (30 cm)

12 inches

(30 cm)

9 inches (23 cm) for appliances

> 10,000 Btuh (3 kW) and ≤

50,000 Btuh (15 kW), 12 inches

(30 cm) for appliances > 50,000

Btuh (15 kW)

*b *b Clearance to permanently closed widow

Vertical clearance to ventilated soffit located above the terminal within a horizontal distance of 2 feet (61 cm) from the center line of the terminal

Clearance to unventilated soffit

12

Installation (Venting) continued-

F=

G=

Clearance to outside corner

Clearance to inside corner

Canadian

Installations

1

*b

*b

US Installations

2

*b

*b

H=

I=

J=

K=

L=

Clearance to each side of center line extended above meter/regulator assembly

Clearance to service regulator vent outlet or oil tank vent

Clearance to non-mechanical air supply inlet to building or the combustion air inlet to any other appliance

Clearance to a mechanical air supply inlet

Clearance above paved sidewalk or paved driveway located on public property

3 feet (91 cm) within a height

15 feet (4.6 m) above the meter/regulator assembly

36 inches

(91 cm)

12 inches (30 cm)

6 feet

(1.83 m)

7 feet

(2.13 m)†

*b

*b

9 inches (23 cm) for appliances

> 10,000 Btuh (3 kW) and ≤

50,000 Btuh (15 kW), 12 inches

(30 cm) for appliances > 50,000

Btuh (15 kW)

3 feet (91 cm) above if within 10 feet horizontally

*b

M= Clearance under a veranda, porch, deck, or balcony

12 inches (30 cm) ‡

1

In accordance with the current CAN/CGA-B149 Installation Codes.

*b

2

In accordance with the current ANSI Z223.1-(Latest edition)/NFPA 54 National Fuel Gas Code.

† A vent shall not terminate directly above a sidewalk or paved driveway that is located between two single-family dwellings and serves both dwellings.

‡ Permitted only if a veranda, porch, deck or balcony is fully open on a minimum of two sides beneath the floor.

*a) A minimum clearance value determined by testing in accordance with section 2.20.

*b) “Clearance in accordance with local installation codes and the requirements of the gas supplier”.

The vent system must terminate so that proper clearances are maintained as cited in local codes or the latest edition of the National Fuel Gas Code,

ANSI Z223.1.73.4e and 7.8a, b as follows:

1. Do not terminate near soffit vents or crawl space or other area where condensate or vapor could create a nuisance or hazard or cause property damage.

2. Do not terminate the exhaust vent terminal where condensate or vapor could cause damage or could be detrimental to the operation of regulators, relief valves, or other equipment.

3. Do not terminate the exhaust vent terminal over public area or walkways where condensate or vapor can cause nuisance or hazard.

4. The vent shall terminate a minimum of 12 inches above expected snowfall level to prevent blockage of vent termination.

Vent pipes serving power vented appliances are classified by building codes as “vent connectors”. Required clearances from combustible materials must be provided in accordance with information in this manual under LOCATION

OF WATER HEATER and CLEARANCES, and with National Fuel Gas Code and local codes.

13

Installation (Venting) continued-

The co-axial vent-air intake tubes of this water heater can be installed in any

360

° configuration as long as the proper clearances for installation, plumbing, operation and servicing are maintained. (See Figure 6).

Figure 6.

Note:

Maintain proper clearances for installation, plumbing, operation and service.

14

HORIZONTAL AND VERTICAL VENT-AIR INTAKE LENGTHS

Optional vent-air intake kits are available that can extend the horizontal length and/or vertical height of the vent-air intake system. Table A lists the various vertical and horizontal vent air-air intake system configurations.

The following components are found in the standard vent and air intake kit,

P/N 239-42979-00 (kit H). This kit, as well as all optional vent and air intake kits must be ordered separately from the manufacturer shown on the rating plate.

4” Vent Tube* Vent Terminal Hardware

6” Air Intake Tube

Vent Terminal

RTV Silicone Sealant

4” Vent Elbow

Inner Wall Term. Mounting Flange 6” Air Intake Elbow

Outer Wall Term. Mounting Flange

• The vent and air intake telescopes from 13 3/4” to 23 11/16”.

Table A

16 1/4 18 25 1/4 37 3/4 61 5/16

17 3/16 20 11/16 35 3/16 57 7/8 107 5/16

11 9/16 order order kit F

16 5/16 *order kit G order

kit req'd order kit H

order kit I

order order order

17 1/4 kit F (2) kit G & F

kit F kit H & F

kit F & I

18 1/16 order order

order order order

20 3/4 kit F & G kit G (2)

kit G kit G & H

kit G & I

25 5/16

order order order order order

35 1/4

kit F kit G kit H kit H (2) kit I

38 1/16

order order order order order

57 15/16 kit H & F kit H & G kit H (2)

kit H (3) kit H & I

61 3/8 order order

order order order

107 3/8 kit I & F kit I & G

kit I kit I & H

kit I (2)

* (2) = Order two of the kits referenced.

* (3) = Order three of the kits referenced.

The bold text above show what kit(s) are needed in addition to the standard vent and air intake tubes. If the standard vent and air intake tubes are not used in the venting system (those that do not have bold text) they can be discarded or saved.

15

Installation (Horizontal and Vertical Vent-Air Intake Lengths) continued-

Figure 7.

16

VENT-AIR INTAKE SYSTEM INSTALLATION

WARNING

The vent-air intake system must be properly installed. Failure to properly install the vent-air intake system could result in property damage, personal injury or death.

Do not install any damaged vent-air intake system components.

Contact the manufacturer of the water heater for replacement parts.

IMPORTANT

When the following instructions specify, to seal a vent-air intake joint, use only Loctite Ultra Blue 587 RTV Silicone sealant. A tube of Loctite

Ultra Blue 587 RTV Silicone sealant is supplied with each optional ventair intake kit. Make sure that all joints are completely sealed.

When drilling pilot holes for the #8 sheet metal screws through the six

(6) inch (15.2 cm) diameter components, be careful not to drill into the inner four (4) inch (10.2 cm) diameter components.

WARNING

The vent-air intake terminal must be installed through at outside wall in a horizontal position. This direct vent water heater is not designed for through the roof vertical venting.

Tools Required For Vent-Air Intake Installation

The following minimum tools are required to properly install the ventair intake system. Note: Wall construction will determine tool usage.

Tape Measure

Drill

3/16 inch (4.75 mm) Diameter Drill Bit(s)

1/8 inch Diameter (3.2 mm) Drill Bit(s)

Masonry Drill Bit(s) (For Poured Concrete, Concrete Block and

Brick Wall Construction)

Reciprocating Saw w/appropriate Blade(s) (Dependent on Wall

Construction)

(For Poured Concrete, Concrete Block and Brick Wall

Construction)

Hammer (For Poured Concrete, Concrete Block and Brick Wall

Construction)

1/4 & 5/16 inch Nut Drivers (Preferred) or Slotted Head

Screwdriver

Phillips Head Screwdriver

17

Installation (Vent-Air Intake System Installation) continued-

1. Measure the vertical height “Y” required in your installation. (See Figure

7). Reference the appropriate Table A to determine number of vent-air intake kits required in your installation.

2. Measure the horizontal length “X” required in your installation (See

Figure 7). Reference Table A to determine number of vent-air intake kits required in your installation.

3. Cut a 6-1/2 inch (16.5 cm) diameter minimum clearance hole in the wall at the point where the vent-air intake tubes will pass through the outside wall and connect with the direct vent-air intake terminal

(See Figure 8).

4. From outside the building, position the outer wall mount plate and direct vent-air intake terminal over the center of the opening. Mark the mounting screw hole locations. With a 3/16 inch (4.7 mm) diameter drill bit (not supplied), drill holes for the wall anchors (supplied). Install the wall anchors but DO NOT affix the outer wall mount plate and direct vent-air intake terminal to the wall at this time (See Figure 8). Note:

Certain construction of walls may require the use of a different type of wall anchoring means than supplied. DO NOT modify the direct vent-air intake terminal or outer wall mount plate.

Figure 8.

18

Installation (Vent-Air Intake System Installation) continued-

IMPORTANT

The following instructions detail the installation of the standard horizontal vent-air intake kit supplied with the water heater.

5. Insert the straight end of the four (4) inch (10.2 cm) diameter elbow into the flue reducer until firmly seated and oriented in the correct direction.

With a 1/8 inch (3.2 mm) diameter drill bit (not supplied), drill three (3) holes, 120 o

apart, through the flue reducer into the four (4) inch (10.2

cm

) diameter elbow. Fasten with three (3) #8 sheet metal screws

(supplied). Using the supplied special RTV silicone sealant, apply a sufficient amount to seal the joint (See Figure 9).

Figure 9.

6. Place the straight end of the six (6) inch (15.2 cm) diameter elbow over the four (4) inch (10.2 cm) diameter elbow and plenum collar until seated on top of the plenum box. Make certain that the six (6) inch (15.2 cm) diameter elbow is oriented in the same direction as the four (4) inch

(10.2 cm) diameter elbow and both are oriented in the correct direction. o

Drill three (3) 1/8 inch (3.2 mm) diameter holes, 120 apart, through the six (6) inch (15.2 cm) diameter elbow into the plenum collar. Fasten with three (3) #8 sheet metal screws (supplied) (See Figure 10).

19

Installation (Vent-Air Intake System Installation) continued-

Figure 10.

7. Extend the four (4) inch (10.2 cm) diameter telescopic tube to its maximum length and slide the backing plate over it. Place the large end of the four (4) inch (10.2 cm) diameter telescopic tube through the hole in the outside wall. Insert the smaller end of the four (4) inch diameter

(10.2 cm)

telescopic tube into the flared end of the four (4) inch (10.2

cm

) diameter elbow, one (1) inch (2.5 cm) (or until seated). Drill three

(3) 1/8 inch (3.2 mm) diameter holes, 120 o

apart, through the four (4) inch (10.2 cm) diameter elbow into the four (4) inch (10.2 cm) diameter telescopic tube. Fasten with three (3) #8 sheet metal screws (supplied).

Adjust the overall length of the four (4) inch (10.2 cm) diameter telescopic tube so that 2-1/2 inches (6.4 cm) extends beyond the outside wall. Drill three (3) 1/8 inch (3.2 mm) diameter holes, 120 o apart, through the four (4) inch (10.2) diameter telescopic tubes where the small and large sections overlap. Fasten with three (3) #8 sheet metal screws

(supplied). Using the supplied special RTV silicone sealant, apply a sufficient amount to seal the joints (See Figure 11).

20

Installation (Vent-Air Intake System Installation) continued-

Figure 11.

8. Extend the six (6) inch (15.2 cm) diameter telescopic tube to its maximum length. Place the large end of the six (6) inch (15.2 cm) diameter telescopic tube over the collar on the outer wall mounting plate. o

Drill three (3) 1/8 inch (3.2 mm) diameter holes, 120 apart, through the six (6) inch (15.2 cm) diameter telescopic tube into the collar on the outer wall mounting plate. Fasten with three (3) #8 sheet metal screws

(supplied). Using the supplied special RTV silicone sealant, apply a sufficient amount to seal the joint (See Figure 12).

Figure 12.

21

Installation (Vent-Air Intake System Installation) continued-

9. From outside the building, slide the six (6) inch (15.2 cm) diameter telescopic tube through the opening in the wall until the outer wall mounting plate is flush with the wall (See Figure 13).

Figure 13.

10. Using the supplied special RTV silicone sealant, apply a bead one (1) inch (2.5 cm) from the end of the four (4) inch (10.2 cm) diameter tube that is part of the vent-air intake terminal. Slide the direct vent-air intake terminal into the four (4) inch (10.2 cm) diameter telescopic tube that extends through the wall and position it so it is flush with the outer wall mounting plate. Make sure that the rain guard and the word “HOT” on the end of the direct vent-air intake terminal are oriented properly.

Secure the direct vent-air intake terminal to the outer wall mounting plate and wall with four (4) #10 x 1 inch screws (supplied) (See Figure

14). Note: Certain construction of walls may require the use of different type of anchoring means than supplied. DO NOT modify the direct vent-air intake terminal or outer wall mounting plate.

22

Installation (Vent-Air Intake System Installation) continued-

Figure 14.

11. From inside the building, slide the backing plate over the six (6) inch

(15.2 cm) diameter telescopic tube until it is flush with the wall. Adjust the length of the six (6) inch (15.2 cm) diameter telescopic tube and insert the end into the flared end of the six (6) inch (15.2 cm) diameter elbow one (1) inch (2.5 cm) (or until seated). Drill three (3) 1/8 inch (3.2 mm) diameter holes, 120 o apart, through the six (6) inch (15.2 cm) diameter elbow into the six (6) inch (15.2 cm) diameter telescopic tube and through the tubes where the small and large sections overlap.

Fasten with three (3) #8 sheet metal screws (supplied). Using the supplied special RTV silicone sealant, apply a sufficient amount to seal all joints (See Figure 15).

Figure 15.

23

Installation (Vent-Air Intake System Installation) continued-

12. Mark the mounting screw hole locations for the backing plate. Rotate the backing plate in order to gain access to the markings. With a 3/16

(4.75 mm) inch diameter drill bit (not supplied), drill holes for the supplied wall anchors. Install the wall anchors and secure the backing plate to the wall with four (4) #10 x 1 inch screws (supplied) (See Figure

16). Note: Certain construction of walls may require the use of a different type of anchoring means than supplied.

Figure 16.

IMPORTANT

When the installation is complete, visually inspect the air intake system to insure that all joints are completely sealed.

24

WATER CONNECTIONS

NOTE: BEFORE PROCEEDING WITH THE INSTALLATION, CLOSE THE

MAIN WATER SUPPLY VALVE.

After shutting off the main water supply, open a faucet to relieve the water line pressure to prevent any water from leaking out of the pipes while making the water connections to the water heater. After the pressure has been relieved, close the faucet. The COLD water inlet and HOT water outlet are identified on the top of the water heater. The fittings at the cold water inlet and hot water outlet are dielectric waterway fittings with 3/4” NPT male thread. Make the proper plumbing connections between the water heater and the plumbing system to the house. Install a shut-off valve in the cold water supply line.

CAUTION

If sweat fittings are to be used, DO NOT apply heat to the nipples on top of the water heater. Sweat the tubing to the adapter before fitting the adapter to the water connections. It is imperative that heat is not applied to the nipples containing a plastic liner.

25

Installation (Water Connections) continued-

WARNING

For protection against excessive temperatures and pressure, install temperature and pressure protective equipment required by local codes, but not less than a combination temperature and pressure relief valve certified by a nationally recognized testing laboratory that maintains periodic inspection of production of listed equipment or materials as meeting the requirements of the Standard for Relief Valves and

Automatic Gas Shutoff Devices for Hot Water Supply Systems, ANSI

Z21.22

and the Standard CAN1-4.4 Temperature, Pressure,

Temperature and Pressure Relief Valves and Vacuum Relief Valves

.

The combination temperature and pressure relief valve shall be marked with a maximum set pressure not to exceed the maximum working pressure of the water heater. The hourly BTU discharge capacity or the rated steam relief capacity of the combination temperature and pressure relief valve shall not be less than the input rating of the water heater.

Install the combination temperature and pressure relief valve into the opening provided and marked for this purpose on the water heater.

Note: Some models may already be equipped or supplied with a combination temperature and pressure relief valve. Verify that the combination temperature and pressure relief valve complies with local codes. If the combination temperature and pressure relief valve does not comply with local codes, replace it with one that does. Follow the installation instructions above on this page.

Install a discharge line, which terminates six (6) inches (15.2 cm) above the floor, or any distance below the structural floor, to the outlet of the combination temperature and pressure relief valve. DO NOT allow water from the discharge line to contact any live electrical part. The discharge line is to be installed to allow for complete drainage of both the combination temperature and pressure relief valve and the discharge line. The water from the discharge line must be directed to a suitable drain or area that will not be damaged by water (Refer to page 5

“LOCATING THE WATER HEATER.” The discharge opening must not be subjected to blockage or freezing. DO NOT thread, plug or cap the discharge line.

It is recommended that a minimum clearance of four (4) inches (10.2

cm)

be provided on the side of the water heater for servicing and maintenance of the combination temperature and pressure relief valve.

Do not place a shutoff valve between the combination temperature and pressure relief valve and the water heater, or on discharge pipes between such valves or the atmosphere.

26

Installation (Water Connections) continued-

WARNING

FAILURE TO INSTALL AND MAINTAIN A NEW, LISTED 3/4” X 3/4”

TEMPERATURE AND PRESSURE RELIEF VALVE WILL RELEASE

THE MANUFACTURER FROM ANY CLAIM, WHICH MIGHT RESULT

FROM EXCESSIVE TEMPERATURES AND PRESSURES.

If this water heater is installed in a closed water supply system, such as the one having a back-flow preventer in the cold water supply, provisions shall be made to control thermal expansion. DO NOT operate this water heater in a closed system without provisions for controlling thermal expansion. Your water supplier or local plumbing inspector should be contacted on how to control this situation.

After installation of the water lines, open the main water supply valve and fill the water heater. While the water heater is filling, open several hot water faucets to allow air to escape from the water system. When a steady stream of water flows through the faucets, close them and check all water connections for possible leaks. NEVER OPERATE THE WATER HEATER

WITHOUT FIRST BEING CERTAIN IT IS FILLED WITH WATER.

WARNING

Hydrogen gas can be produced in an operating water heater that has not had water drawn from the tank for a long period of time

(generally two weeks or more). Hydrogen gas is extremely flammable. To prevent the possibility of injury under these conditions, we recommend the hot water faucet to be open for several minutes at the kitchen sink before you use any electrical appliance, which is connected to the hot water system. If hydrogen is present, there will be an unusual sound such as air escaping through the pipes as hot water begins to flow. Do not smoke or have open flame near the faucet at the time it is open.

This water heater can deliver scalding temperature water at any faucet in the system. Be careful whenever using hot water to avoid scalding injury.

Certain appliances such as dishwashers and automatic clothing washers may require increased temperature water. By setting the thermostat on this water heater to obtain the increased temperature water required by these appliances, you may create the potential for scald injury. To protect against injury, you should install an ASSE approved mixing valve in the water system. This valve will reduce point of discharge temperature by mixing cold and hot water in branch supply lines. Such valves are available from the manufacturer of this water heater or a local plumbing supplier. Please consult with a plumbing professional.

27

Installation (Water Connections) continued-

28

Gas Connections

The gas supply lines must meet all requirements of the National Fuel Gas Code

(ANSI Z223.1-Latest Edition), or in Canada CAN/CGA B149.1 Natural Gas

Installation Code (Latest Edition) or CAN/CGA B149.2 Propane Installation Code

(Latest Edition).

The minimum permissible gas supply pressure for the purpose of input adjustment is one (1.0) inch (0.25 kPa) water column above the operating manifold pressure. See the rating plate and gas valve for the manifold pressure and gas type. The maximum permissible gas supply pressure is fourteen (14.0) inches (3.5 kPa) water column for natural gas and liquefied petroleum gases/propane gas.

1. Connect this water heater only to the type of gas (Natural or Propane gas) as shown on the rating plate. Use clean black iron pipe or equivalent material approved by local codes and ordinances. (Dirt and scale from the pipe can enter the gas valve and cause it to malfunction). The inlet gas line must have a minimum length of three (3) inches (7.6 cm) drip leg (sediment trap) installed as close to the water heater’s gas valve as possible. A ground joint union must be installed as close to the water heater as possible in the gas supply line feeding the water heater to permit servicing of the water heater. Compounds used on the threaded joints of the gas piping must be resistant to the action of liquefied petroleum gases/propane gas. DO NOT apply pipe dope to the gas valve inlet and make certain that no pipe dope has become lodged in the inlet screen of the gas valve. Extreme care must be taken to ensure no pipe dope enters the gas valve. Avoid excessive torque when tightening the gas supply line to the gas valve. Excessive torque may result in cracking of the gas valve housing and could create a gas leak. When tightening gas supply line to L.P. control, it is recommended to hold the inlet body of the control securely with an adequate wrench. The suggested maximum torque is 31.5 ft. lbs. (4.4 kg-m).

WARNING

The manufacturer of this water heater will not be liable for any damage or injury caused as a result of a cracked gas inlet as a result of excessive torque.

2. This water heater and its gas connection must be leak tested before placing the water heater in operation. Check for gas leaks with a soap and water solution and a brush or a commercial leak detector fluid. NEVER USE A MATCH OR

OPEN FLAME FOR TESTING!

CAUTION

The water heater and individual shutoff valve must be disconnected from the gas supply piping system during any pressure testing of the system at test pressures in excess of 1/2 psi (3.5 kPa). The water heater must be isolated from the gas supply piping system by closing its manual shutoff valve during any pressure testing of the gas supply system at test pressures equal to or less than 1/2 psi (3.5 kPa). The supply line must be capped when not connected to the water heater.

3. While checking for leaks care must be taken to prevent solution from contacting the electrical connections at the control. If electrical connections at the control become wet, they must be thoroughly dried before attempting to operate the water heater.

29

GENERAL OPERATION

WARNING

Water heaters are heat-producing appliances. To avoid damage or injury, do not store materials against the water heater or vent-air intake system. Use proper care to avoid unnecessary contact (especially by children) with the water heater and vent-air intake system. UNDER NO

CIRCUMSTANCES SHALL FLAMMABLE MATERIALS, SUCH AS

GASOLINE OR PAINT THINNER BE USED OR STORED IN THE

VICINITY OF THIS WATER HEATER, VENT-AIR INTAKE SYSTEM OR

IN ANY LOCATION FROM WHICH FUMES COULD REACH THE

WATER HEATER OR VENT-AIR INTAKE SYSTEM.

TO FILL THE WATER HEATER

1. Close the water heater drain valve by turning the knob clockwise

2. Open the cold water supply shut-off valve.

3. Open several hot water faucets to allow air to escape from the system.

.

4. When a steady stream of water flows from the faucets, the water heater is filled. Close the faucets and check for water leaks at the water heater drain valve, combination temperature and pressure relief valve and the hot and cold water connections.

TO DRAIN THE WATER HEATER

Should it become necessary to completely drain the water heater, make sure you follow the steps below:

1. Set the thermostat dial to the lowest possible position.

2. Rotate and if applicable partially depress gas control knob clockwise

to the “OFF” position.

3. Shut off the gas supply to the water heater.

4. Close the cold water supply shut-off valve.

5. Open the drain valve on the water heater by turning the knob counterclockwise . The drain valve has threads on the end that will allow the connection of a standard hose coupling.

6. Open a hot water faucet to allow air to enter the system.

To refill the water heater, refer to “To Fill the Water Heater.”

30

Lighting and Shutdown Instructions

FOR YOUR SAFETY READ BEFORE LIGHTING

A.

WARNING: If you do not follow these instructions exactly, a fire or explosion may result causing property damage, personal injury or loss of life.

This appliance has a pilot which is lit by a piezo-electric spark gas ignition system. Do not open the inner door and attempt to light the pilot by hand.

B.

BEFORE LIGHTING smell all around the appliance area for gas. De sure to smell next to the floor because some gas is heavier than air and will settle on the floor.

WHAT TO DO IF YOU SMELL GAS

Do not try to light any appliance.

Do not touch any electric switch; do not use any telephone in your building.

Immediately call your gas supplier from a neighbor's phone. Follow the gas supplier's instructions.

If you cannot reach your gas supplier, call the fire department.

Use only your hand to push in or turn the gas control knob. Never use tools. If the knob will not push in or turn by hand, don't try to repair it, call a qualified service technician. Force or attempted repair may result in a fire or explosion.

Do not use this appliance if any part has been under water. Immediately call a a qualified service technician to inspect the appliance and to replace any part of the control system and any gas control which has been under water.

LIGHTING INSTRUCTIONS

1. STOP! Read the safety information 8. Turn the gas control knob counterclockwise above on this label.

2. Set the thermostat to lowest possible setting.

3. Rotate and if applicable, partially depress gas control knob clockwise to "OFF" position.

GAS CONTROL

KNOB SHOWN IN

"OFF" POSITION

GAS CONTROL

KNOB SHOWN IN

"OFF" POSITION

9a. FOR EXHIBIT A GAS CONTROLS-

Depress and hold down red pilot set button.

Immediately depress piezo igniter button until you hear a "click" sound, then release. Continue to hold down the pilot set button for about one (1) minute after the pilot is lit. Release the pilot set button and it should pop back up. Pilot should remain lit. If it goes out, repeat steps 3 through 9.

EXHIBIT A EXHIBIT B

NOTE: On exhibit B, knob cannot be turned from "PILOT" to "OFF" unless knob is depressed slightly. Do not force.

4. Wait five (5) minutes to clear out any gas.

Then smell for gas, including near the floor.

If you smell gas, STOP! Follow "B" in the safety information above on this label.

If you don't smell gas, go to the next step.

5. Remove outer

9b. FOR EXHIBIT B GAS CONTROLS-

Depress and hold down gas control knob.

Immediately depress piezo igniter button until you hear a "click" sound, then release. Continue to hold down the knob for about one (1) minute after the pilot is lit. Release the knob and it should pop back up. Pilot should remain lit. If it goes out, repeat steps 3 through 9.

6. Locate piezo igniter button.

7. Look into sight glass window on inner door to view pilot.

FOR EXHIBIT A & B GAS CONTROLS-

If button or knob does not pop up when

released, stop and immediately call your

service technician or gas supplier.

If the pilot will not stay lit after several tries,

turn the gas control knob to "OFF" and call

your technician or gas supplier.

10. Replace outer door.

11. Turn gas control knob

12. Set thermostat to desired setting.

TO TURN OFF GAS TO APPLIANCE

1. Set the thermostat dial to lowest possible setting.

2. Rotate and if applicable, partially depress gas control knob clockwise to "OFF" position.

31

THERMOSTAT ADJUSTMENT

160°F Control 180°F Control

Figure 17.

The thermostat dial is set to its lowest temperature setting when shipped from the factory.

Remember that lower temperature settings are more energy efficient

. Adjust the temperature by turning the thermostat dial. It is suggested that the starting point setting not be greater than the ” “ or “ “mark on the thermostat dial (approximately 120°F [48.9°C]) as indicated below. Rotate the thermostat dial clockwise to decrease the temperature setting. Rotate the thermostat dial counter-clockwise to increase the temperature setting. Adjust the dial until the minimum acceptable temperature is achieved (See figure 17 above for approximate temperature settings).

160°F Control 180°F Control

Figure 18.

The thermostat dial is set to its lowest temperature setting when shipped from the factory.

Remember that lower temperature settings are more energy efficient

. Adjust the temperature by turning the thermostat dial. It is suggested that the starting point setting not be greater than the “ ” mark on the thermostat dial (approximately 120°F [48.9°C]) as indicated below. Rotate the thermostat dial counter-clockwise to decrease the temperature setting. Rotate the thermostat dial clockwise to increase the temperature setting.

Adjust the dial until the minimum acceptable temperature is achieved (See figure 18 above for approximate temperature settings).

32

DANGER

Hotter water increases the risk of scald injury. Scalding may occur within five (5) seconds at a temperature setting of 140

°

F (60

°

C)

. To protect against hot water injury, install an

ASSE approved mixing valve in the water system. This valve will reduce point of discharge temperature by mixing cold and hot water in branch water lines. A licensed plumbing professional or local plumbing authority should be consulted.

Note:

This water heater is equipped with an energy cut out device to prevent overheating. Should overheating occur or the gas supply fail to shut off, turn off the manual gas control valve to the appliance and call a qualified service technician.

Note:

Whenever the water heater is filled with cold water, condensate will form on the cool tank surface and drops of water will fall on the hot burner and combustion chamber surfaces producing a “sizzling” noise. Condensation is normal and does not indicate a leak. It will disappear when the tank becomes heated.

Burner Flame Check

Cast Iron Burner:

At the time of installation and at periodic intervals (not more than 6 months), a visual check of the main burner and pilot flames should be made to determine if they are burning properly. For ideal operation, the gas and air must be properly proportioned. The proper airgas mixture is obtained by adjusting the air shutter on the mixer face of the main burner (See Figure 19). To adjust for proper burning, loosen the air shutter nut (if provided), rotate shutter to close the opening in the burner then slowly rotate the shutter until the yellow tips disappear and the flame becomes blue. On 75 gallon models fired on LPG or propane, adjust the air shutter as described above until the yellow flame is minimized (note-the burner flame may contain a mixture of yellow and blue). Tighten the air shutter nut (if provided). Too much air will cause the flame to lift off the burner ports and create noisy operation. Too little air will result in soot formation. The main burner flame should light smoothly from the pilot.

Steel Burner:

These models are equipped with self adjusting air mixture and do not have an adjustable air shutter (See Figure 19). At periodic intervals a visual check of the main burner and pilot flames should be made to determine if they are burning properly. The main burner flame should light smoothly from the pilot.

Figure 19.

33

MAINTENANCE

WARNING

Water heaters are heat-producing appliances. To avoid damage or injury, do not store materials against the water heater or vent-air intake system. Use proper care to avoid unnecessary contact (especially by children) with the water heater and vent-air intake system. UNDER NO

CIRCUMSTANCES SHALL FLAMMABLE MATERIALS, SUCH AS

GASOLINE OR PAINT THINNER BE USED OR STORED IN THE

VICINITY OF THIS WATER HEATER, VENT-AIR INTAKE SYSTEM

OR IN ANY LOCATION FROM WHICH FUMES COULD REACH THE

WATER HEATER OR VENT-AIR INTAKE SYSTEM.

IMPORTANT

The water heater should be inspected at a minimum annually by a qualified service technician for damaged components and/or joints not sealed. DO NOT operate this water heater if any part is found damaged or if any joint is found not sealed.

A qualified service technician should perform the following maintenance at the minimum periodic intervals suggested below. In some installations the maintenance interval may be more frequent depending on upon the amount of use and the operating conditions of the water heater. Regular inspection and maintenance of the water heater and vent-air intake system will help to insure safe and reliable operation.

1. Annually check the operation of the thermostat.

2. The flow of combustion and ventilation air MUST NOT be restricted.

Annually inspect the direct vent-air intake terminal to insure it is not blocked or damaged. Clear the direct vent-air intake terminal openings of any dirt, dust, or other restrictions. WARNING! Certain areas of the direct vent-air intake terminal are HOT.

3. Annually inspect the vent-air intake system to insure that all components are securely fastened and all joints and seams are properly sealed.

4. At all times keep the water heater area clear and free from combustible materials, gasoline and other flammable vapors and liquids.

5. Bi-annually conduct a visual check of the main and pilot burner flames to determine that they are burning properly. See the information described previously under “BURNER FLAME CHECKS” in this Installation and

Operating Instruction Manual. If sooting or other burner anomalies are evident, shut down the water heater by turning off the gas per the instructions listed in this manual or as listed on the water heater.

34

Maintenance continued-

6. Annually remove the inner door and main burner assembly to clean orifices and related parts of any dirt or other foreign material. Inspect the burner ports for obstructions or debris and clean with a wire brush as needed. Wire brush and/or vacuum clean the combustion chamber as needed to remove scale deposits and debris. Inspect the inner door gasket for wear and tear and replace if necessary. NOTE: It is

imperative for proper operation of the water heater that the inner door be properly sealed.

7. At least once a year, check the combination temperature and pressure relief valve to insure that the valve has not become encrusted with lime.

Lift the lever at the lever at the top of the valve several times until the valve seats properly without leaking and operates freely.

WARNING

When lifting lever of the combination temperature and pressure relief valve, hot water will be released under pressure. Be careful that any released water does not result in bodily injury or property damage.

8. Monthly, drain off a gallon of water to remove silt and sediment by using the water heater’s drain valve.

WARNING!

THIS WATER MAY BE HOT.

9. If the combination temperature and pressure relief valve on the appliance discharges periodically, this may be due to thermal expansion in a closed water supply system. Contact the water supplier or local plumbing inspector on how to correct this situation. Do not plug the combination temperature and pressure relief valve outlet.

10. A combination sacrificial anode rod/hot water outlet nipple has been installed to extend tank life. The anode rod should be inspected periodically (every two years) and replaced when necessary to prolong tank life. Contact the plumbing professional who installed the water heater or the manufacturer listed on the rating plate for anode replacement information. The use of a water softener may increase the speed of anode consumption. More frequent inspection of the anode is needed when using softened (or phosphate treated) water.

35

Maintenance continued-

CAUTION

FOR YOUR SAFETY. DO NOT ATTEMPT REPAIR OF COMBINATION

GAS CONTROL, BURNERS OR GAS PIPING. REFER REPAIRS TO A

QUALIFIED SERVICE TECHNICIAN.

Contact your supplier or plumbing professional for replacement parts or contact the company at the address given on the rating plate of the water heater.

Provide the part name, model and serial numbers of the water heater when ordering parts.

READ THE WARRANTY FOR A FULL EXPLANATION OF THE LENGTH

OF TIME THAT PARTS AND THE WATER HEATER ARE WARRANTED.

Manufactured under one or more of the following U.S. Patents: RE.34,534;

B1 5,341,770; 4,416,222; 4,628,184; 4,669,448; 4,672,919; 4,808,356; 4,829,983;

4,861,968; 4,904,428; 5,000,893; 5,023,031; 5,052,346; 5,081,696; 5,092,519;

5,115,767; 5,199,385; 5,277,171; 5,372,185; 5,485,879; 5,574,822; 5,596,952;

5,660,165; 5,682,666; 5,761,379; 5,943,984; 5,954,492; 5,988,117; 6,142,216;

6,684,821; 7,063,132;

Other U.S. and Foreign patent applications pending. Current Canadian Patents:

1,272,914; 1,280,043; 1,289,832; 2,045,862; 2,092,105; 2,107,012; 2,108,186;

2,112,515

Complete the following information and retain for future reference:

Model No: ___________________________________________________

Serial No: ___________________________________________________

Service Phone

Days: Nights: ______________________

Address: ____________________________________________________

Supplier: ____________________________________________________

Supplier Phone No:____________________________________________

36

PARTS LIST

PART NAME & DESCRIPTION

1. Direct Vent-Air Intake

Terminal

2. Outer Wall Mounting Plate

3. Backing Plate

4. Six (6) inch (15.2) Diameter

Telescopic Air Intake Tube

5. Four (4) inch (10.2) Diameter

Telescopic Vent Tube

6. Six (6) inch (15.2) Diameter

Elbow

7. Four (4) inch (10.2) Diameter

Elbow

8. Plenum

9. Plenum Gasket

10. Flue Reducer

11. Jacket Top

12. Direct Vent-Air Intake

Terminal Guard (Optional)

13. Glass Lined Tank

14. Flue Baffle Assembly

15. Dip Tube & Nipple

16. Anode Rod & Nipple

Valve (Certain Models)

18. Air Intake Tube

21. Piezo Igniter Assembly

22. Drain Valve

23. Outer Door

24. Jacket

25. Inner Door Assembly

26. Air Intake Boot

27. Air Intake Boot Gasket

28. Pilot Assembly w/Electrode

29. Gas Feed Line (Burner)

30. Main Burner Orifice

31A. 42 Port Steel Burner

31B. 65 Port Cast Iron Burner

(Certain Models)

32. Radiation Shield

33A. Direct Vent-Air Intake Kit F

(Optional) (Not Shown)

33B. Direct Vent-Air Intake Kit G

(Optional) (Not Shown)

33C. Direct Vent-Air Intake Kit H

(Supplied & Optional)

33D. Direct Vent-Air Intake Kit I

(Optional) (Not Shown)

34. Loctite Ultra Blue 587 RTV

Silicone Sealant

19. Combustion

Assembly

20. Combination Gas Control w/E.C.O.

Note: Provide the part name, model and serial numbers of the water heater when ordering parts.

THIS MANUAL SHOULD BE KEPT WITH THE WATER HEATER

37

PARTS LIST DRAWING-DIRECT VENT WATER HEATER

38

VENT-AIR INTAKE KITS

39

THE FOLLOWING INSTRUCTIONS ARE FOR INSTALLATION OF:

GAS WATER HEATERS

SUITABLE FOR WATER (POTABLE) HEATING AND SPACE

HEATING

1. All piping components connected to this water heater for space heating applications must be suitable for use with potable water. In

Massachusetts, space heating piping length must not exceed 50 feet.

2. Toxic chemicals, such as those used for boiler treatment, must not be introduced into potable water used for space heating.

3. This water heater must not be connected to an existing heating system or component(s) previously used with a non-potable water-heating

appliance.

4. When the system requires water for space heating at temperatures higher than required for other means, such as an ASSE approved mixing valve shall be installed to temper the water for those uses in order to reduce the scald hazard potential.

Please refer to the illustration for suggested piping arrangements.

40

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