A.O. Smith 400A, BTH 300A User Manual

CYCLONE XHE®

Series 970

Model BTH 300A AND 400A

COMMERCIAL GAS WA TER HEA TER

GAS-FIRED POWER BURNER

FOR DOMESTIC HOT W A TER

• INST ALLATION • OPERATION • SERVICE • MAINTENANCE • LIMITED WARRANTY

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

– Do not store or use gasoline or other

flammable 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.

Thank you for buying this energy efficient water heater from A.O. Smith Water Products Company. We appreciate your confidence in our products.

CAUTION

TEXT PRINTED OR OUTLINED IN RED CONTAINS INFORMA TION RELATIVE TO YOUR SAFETY. PLEASE READ THOROUGHLY BEFORE INSTALLING AND USING THIS APPLIANCE.

PLACE THESE INSTRUCTIONS ADJACENT TO HEA TER AND NOTIFY OWNER TO KEEP FOR FUTURE REFERENCE.

PRINTED IN U.S.A. 0306 PART NO. 197373-000

A DIVISION OF A.O. SMITH CORPORATION

Mc BEE, SOUTH CAROLINA

STRATFORD (ONTARIO) CANADA

www.hotwater.com

ROUGH-IN-DIMENSIONS

GAS VALVE PIPING

BT H-3 00 1 1/4" NPT BT H -400 1 1/4" NPT

TABLE 1 RECOVER Y CAP ACITIES.

U.S. Gallons/Hr and Litres/Hr at TEMPERATURE RISE INDICATED

MODEL GAS BTUH KW Capacity C° 11C° 17C° 22C° 28C° 33C° 39C° 44C° 50C° 56C° 61C° 67C° 72C° 78C°

BTH-300

BTH-400

Recovery capacities are based on heater performance at 98% thermal efficiency .

TYPE OF INPUT Approx. F° 20F° 30F° 40F° 50F° 60F° 70F° 80F° 90F° 100F° 110° 120F° 130F° 140F°

NA TURAL

PROPAN E

NA TURAL

PROPAN E

300,000 130 US Gals. GPH 1782 1188 891 713 594 509 445 396 356 324 297 274 255

88 492 Litres LPH 6745 4496 3372 2698 2248 1927 1686 1499 1349 1226 1124 1038 964

280,000 130 US Gals. GPH 1663 1109 832 665 554 475 416 370 333 302 277 256 238

82 492 Litres LPH 6295 4197 3148 2518 2098 1799 1574 1399 1259 1145 1049 968 899

400,000 130 US Gals. GPH 2376 158 4 1188 950 792 679 594 528 475 432 396 366 339

117 492 Litres LPH 8993 5995 4496 3597 2998 2569 2248 1998 1799 1635 1499 1384 1285

400,000 130 US Gals. GPH 2376 1584 1188 950 792 679 594 528 475 432 396 366 339

117 492 Litres LPH 8993 5995 4496 3597 2998 2569 2248 1998 1799 1635 1499 1384 1285

FOREWORD

These designs comply with the current edition of the

American National Standard for Gas Water Heaters, Volume III, ANSI Z21.10.3 / CSA 4.3 as an automatic circulating tank water heater, and automatic storage water heaters.

Detailed installation diagrams are found in this manual. These diagrams will serve to provide the installer with a reference for the materials and methods of piping necessary. It is highly essential that all water, gas piping and wiring be installed as shown on the diagrams.

Particular attention should be given to the installation of thermometers at the locations indicated on the diagrams as these are necessary for checking the proper functioning of the heater.

In addition to these instructions, the equipment shall be installed in accordance with those installation regulations in force in the local area where the installation is to be made. These shall be carefully followed in all cases. Authorities having jurisdiction should be consulted before installations are made.

In the absence of local codes, the installation must comply with the current editions of the National Fuel Gas Code, ANSI Z223.1/NFPA 54 and the National Electrical Code, NFPA 70 or CAN/CSA-B149.1, the Natural Gas and Propane Installation Code and CSA C22.1, the Canadian Electrical Code. All documents are available from the Canadian Standards Association, 8501 East Pleasant Valley Road, Cleveland, OH 44131. NFPA documents are also available from the National Fire Protection Association, 1 Batterymarch Park, Quincy, MA 02269.

TABLE OF CONTENTS

PAGE

ROUGH-IN DIMENSIONS ................................................................... 2

FOREWORD ...................................................................................... 2

FEATURES ........................................................................................ 3

Water Temperature Control.......................................................... 3-4

High Limit Switch (E.C.O.)............................................................ 4

Dishwashing Machine Requirement ............................................ 4

Circulating Pump........................................................................... 4

INSTALLA TION INSTRUCTIONS ........................................................ 4

Required Ability ............................................................................ 4

Insulation Blankets ....................................................................... 4-5

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

Clearances ................................................................................... 5

Hard Water ................................................................................... 5

Air Requirements ......................................................................... 6

Mechanical Exhausting of Room Air ............................................ 6

Unconfined Space ........................................................................ 6

Confined Space ............................................................................ 6

Chemical Vapor Corrosion........................................................... 6

VENTING ........................................................................................... 6

Vent Pipe Termination ................................................................... 6

Direct Venting............................................................................... 7-8

Direct Vent Terminal Installation ................................................... 8

Installation Sequence ................................................................... 8-9

Vertical Vent Terminal Installation ................................................ 9

Installation Sequence ................................................................... 9

Installation of Vent System .......................................................... 10

Vent Pipe Preparation................................................................... 10-11

CONTROLS AND SWITCHES ............................................................ 11

Blower Prover Switch ................................................................. 11

Blocked Outlet Prover Switch...................................................... 11

Blocked Inlet Prover Switch......................................................... 11

Low Gas Pressure Switch .......................................................... 11

On/Off Switch .............................................................................. 11

Hot Surface Igniter ....................................................................... 11

GAS PIPING....................................................................................... 12

Connection of Gas Pipe ............................................................... 12-13

Purging ......................................................................................... 13

Gas Meter Size - City Gases Only .............................................. 1 3

Gas Pressure Regulation............................................................. 13

Gas Valves................................................................................... 13

SYSTEM CONNECTIONS .................................................................. 13

Thermometers .............................................................................. 13

Relief Valve .................................................................................. 13

Water Line Connections .............................................................. 13

PAGE

Closed System ................................................................................ 13

Water (Potable) Heating & Space Heating ...................................... 13

Heater Wiring ..................................................................................14-15

OPERATION.......................................................................................... 15

Sequence of Operation .................................................................. 15

Self Diagnostic Controller ............................................................... 15

Gas Value LEDs Flashing ............................................................... 15

Error Codes ..................................................................................... 16

Fault Conditions............................................................................... 16

No Incoming Line Voltage................................................................ 16

No Low Voltage .......................................................................... 16

T emperature Probe Fault................................................................. 16

E.C.O. Switch Open ........................................................................ 17

Control Bad...................................................................................... 17

Combustion Air Blockage ................................................................ 17

PRIOR TO STA RT-UP ........................................................................... 18

Required Ability ............................................................................... 18

OPERATING INSTRUCTIONS................................................................ 18

Adjustment Procedure (Initial Start-Up) .......................................... 18

Lighting Instructions ........................................................................ 19

Cathodic Protection ......................................................................... 20

Precautions ..................................................................................... 20

GENERAL INFORMA TION .................................................................... 20

Power Burner ................................................................................. 20

High Limit ......................................................................................... 20

High Altitude Installations ................................................................ 20

MAINTENANCE .................................................................................... 20

General............................................................................................ 20

Maintenance Schedule ................................................................... 20

Flushing ........................................................................................... 21

Draining ........................................................................................... 21

Sediment Removal........................................................................... 21

Lime Scale Removal ........................................................................ 21

Powered Anode System .................................................................21-22

Drain Valve and Access Panels ..................................................... 22

Relief Valve ..................................................................................... 22

Internal Circulating Pump................................................................. 22

Vent System .................................................................................... 22

INSTALLA TION DIAGRAMS .................................................................23-27

Manifold Kits .................................................................................... 28

CHECKLIST AND SERVICE INFORMA TION .......................................... 29

TROUBLE-SHOOTING..........................................................................29-30

REPLACEMENT P ARTS ........................................................................ 30

LIMITED WARRANTY........................................................................... 31

FEATURES

IMPORTANT

IT IS REQUIRED THAT A QUALIFIED SERVICE TECHNICIAN PERFORM THE INITIAL FIRING OF THE HEATER. AT THIS TIME THE USER SHOULD NOT HESIT ATE TO ASK THE TECHNICIAN ANY QUESTIONS WHICH HE MAY HAVE IN REGARD TO THE OPERATION AND MAINTENANCE OF THE UNIT.

A CHECKLIST AND SERVICE INFORMATION section are included at the rear of this manual. By using this checklist the user may be able to make minor operational adjustments and save himself unnecessary service calls. However, the user should not attempt repairs which are not listed in this section.

WATER TEMPERATURE CONTROL

DANGER

THIS WATER HEATER IS EQUIPPED WITH AN ADJUSTABLE THERMOSTAT TO CONTROL WATER TEMPERATURE. HOT WATER TEMPERATURES REQUIRED FOR AUTOMATIC DISHWASHER AND LAUNDRY USE CAN CAUSE SCALD BURNS RESULTING IN SERIOUS PERSONAL INJURY AND/OR DEATH. THE TEMPERA TURE A T WHICH INJUR Y OCCURS V ARIES WITH THE PERSON’S AGE AND TIME OF EXPOSURE. THE SLOWER RESPONSE TIME OF CHILDREN, AGED OR DISABLED PERSONS INCREASES THE HAZARDS TO THEM. NEVER ALLOW SMALL CHILDREN TO USE A HOT WATER TAP, OR TO DRAW THEIR OWN BATH WATER. NEVER LEAVE A CHILD OR DISABLED PERSON UNATTENDED IN A BATHTUB OR SHOWER.

THE WATER HEATER SHOULD BE LOCATED IN AN AREA WHERE THE GENERAL PUBLIC DOES NOT HAVE ACCESS TO SET TEMPERATURES.

The water temperature is controlled using the Temperature Control Button on the Display at the front of the unit (See Figure 1). This control utilizes two temperature probes to determine the tank temperature. The primary temperature probe is located at the top of the tank and the other is near the water inlet.

“AT A GLANCE” BTH 300/400

QUICK INSTALLATION TIPS

Horizontal Sidewall V enting Vertical Rooftop Venting

The temperature may be adjusted from 80°F/27°C to 180°F/82°C. The thermostat was adjusted to 120°F/49°C before the heater was shipped from the factory. It is recommended that lower water temperatures be used to avoid the risk of scalding. It is further recommended, in all cases, that the water temperature be set for the lowest temperature which satisfies your hot water needs. This will also provide the most energy efficient operation of the water heater and minimize scale formation.

WATER TEMPERATURE SETPOINT

ADJUSTMENT PROCEDURE

CAUTION

THE TEMPERATURE OF THE WA TER AT THE T ANK OUTLET MAY NOT CORRESPOND TO THE TEMPERATURE SETPOINT PROGRAMMED IN THE CONTROLLER. THE USER CAN EASIL Y CHANGE THE TEMPERA TURE SETPOINT A T ANY TIME BY USING THE FOLLOWING PROCEDURE. IN ALL CASES, INPUT POWER MUST BE APPLIED TO THE CONTROLLER TO PERFORM ANY PROGRAMMING OPERA TIONS.

To change or view the current programmed temperature setpoint value, utilize the pushbutton on the Display Board. Momentarily pressing the button will briefly illustrate the existing setpoint value. If the button is held down for more than one second, the programming mode is automatically entered and the setpoint value will begin incrementing or decrementing by one degree per second. The control will alternate between between the incrementing or decrementing mode each time the button is pressed. When the desired setpoint value is reached, simply release the button and the controller will automatically retain this value in temporary memory. After one complete heat cycle, the new setpoint is transferred to permanent memory.

Note: If power is interrupted prior to completing one heat cycle, the new setpoint will not be transferred to permanent memory. Therefore, it is a good practice to recheck the setpoint value at the end of a heat cycle after a new value has been entered.

If the button is held down long enough, the setpoint will reach 70°F (the minimum value) and stop. At this point, if the desired setpoint has not been obtained, release the button and depress it again. The setpoint value will now restart at 70°F and once again increase in value for as long as the button is pressed.

Figure 1 shows the approximate time-to-burn relationship for normal adult skin. Short repeated heating cycles caused by small hot water uses can cause temperatures at the point of use to exceed the thermostat setting by up to 20°F (11C°). If you experience this type of use, you should consider using lower temperature settings to reduce scald hazards.

Temperature Time to Produce 2nd & 3rd

Setting Degree Burns on Adult Skin 180°F / 82°C Nearly instantaneous 170°F / 77°C Nearly instantaneous 160°F / 71°C About 1/2 second 150°F / 66°C About 1-1/2 seconds 140°F / 60°C Less than 5 seconds 130°F / 54°C About 30 seconds 120°F / 49°C More than 5 minutes

FIGURE 1.

Valves for reducing point-of-use temperature by mixing cold and hot water are available (see Figure 2). Also available are inexpensive devices that attach to faucets to limit hot water temperatures. Contact a licensed plumber or the local plumbing authority.

FIGURE 2.

HIGH LIMIT SWITCH (E.C.O.)

The top immersion well of the dual bulb controller also contains the high limit (energy cutoff) sensor . The high limit switch interrupts the main burner gas flow should the water temperature reach approximately 202°F/94°C.

Should the high limit switch activate, it must be manually reset by depressing the Temperature Adjustment Button/Reset Button on the display board. The water temperature must drop below 160°F/ 71°C before the controller can be reset.

Continued manual resetting of high limit control, preceded by higher than usual water temperature is evidence of high limit switch operation. The following is a possible reason for high limit switch operation.

• A malfunction in the thermostatic controls would allow the gas valve to remain open causing water temperature to exceed the thermostat setting. The water temperature would continue to rise until high limit switch operation.

Contact your dealer or servicer if continued high limit switch operation occurs.

DISHWASHING MACHINE REQUIREMENT

All dishwashing machines meeting the National Sanitation Foundation requirements are designed to operate with water flow pressures between 15 and 25 pounds per square inch (103 Kpa and 173 Kpa). Flow pressures above 25 pounds per square inch (173 Kpa), or below 15 pounds per square inch (103 Kpa), will result in improperly sanitized dishes. Where pressures are high, a water pressure reducing or flow regulating control valve should be used in the 180°F (82°C) line to the dishwashing machine, and should be adjusted to deliver water between these limits.

The National Sanitation Foundation also recommends circulation of 180°F (82°C) water. Where this is done, the circulation should be very gentle so that it does not cause any unnecessary turbulence inside the water heater. The circulation should be just enough to provide 180°F (82°C) water at the point of take-off to the dishwashing machine. Adjust flow by means of the plug cock in the circulating line. (See installation diagrams.)

CIRCULATING PUMP

A circulating pump is used when a system requires a circulating loop or there is a storage tank used in conjunction with the heater. Refer to the piping diagrams a t rear of manual for electrical hookup information and install in accordance with the current edition of the National Electrical Code, NFPA 70 or the Canadian Electrical Code, CSA C22.1.

All bronze circulators are recommended for used with commercial water heaters.

Although circulators are oiled and operated by the manufacturer some circulators must be oiled again before operated. Please refer to manufacturer's instructions.

INSTALLATION INSTRUCTIONS

REQUIRED ABILITY

INSTALLATION OR SERVICE OF THIS WATER HEATER REQUIRES ABILITY EQUIVALENT TO THAT OF A LICENSED TRADESMAN IN THE FIELD INVOLVED. PLUMBING, AIR SUPPL Y , VENTING, GAS SUPPLY AND ELECTRICAL WORK ARE REQUIRED.

THE HEATER SHALL BE LOCATED OR PROTECTED SO IT IS NOT SUBJECT TO PHYSICAL DAMAGE BY A MOVING VEHICLE.

DO NOT LOCATE THE HEATER WHERE NOISE FROM THE EXHAUST OR INTAKE WILL BE OBJECTIONABLE. THIS INCLUDES LOCATIONS CLOSE TO OR ACROSS FROM WINDOWS AND DOORS. AVOID ANCHORING THE VENT AND INTAKE PIPES DIRECTLY TO FRAMED WALLS, FLOORS OF CEILINGS UNLESS RUBBER ISOLATION PIPE HANGERS ARE USED. THIS PREVENTS ANY VIBRATIONS FROM BEING TRANSMITTED INTO THE LIVING SPACES.

WARNING

FLAMMABLE ITEMS, PRESSURIZED CONTAINERS OR ANY OTHER POTENTIAL FIRE HAZARDOUS ARTICLES MUST NEVER BE PLACED ON OR ADJACENT TO THE HEATER. OPEN CONTAINERS OF FLAMMABLE MATERIAL SHOULD NOT BE STORED OR USED IN THE SAME ROOM WITH THE HEATER.

When installing the heater, consideration must be given to proper location. Location selected should be as close to the intake and exhaust termination points as practicable, with adequate air supply and as centralized with the piping system as possible.

INSULA TION BLANKETS

Insulation blankets available to the general public for external use on gas water heaters are not approved for use on your A.O. Smith water heater. The purpose of an insulation blanket is to reduce the standby heat loss encountered with storage tank water heaters. Your A.O. Smith water heater meets or exceeds the ASHRAE/IES 90.1-1999 standards with respect to insulation and standby loss requirements, making an insulation blanket unnecessary.

WARNING

Should you choose to apply an insulation blanket to this heater, you should follow these instructions. Failure to follow these instructions can result in fire, asphyxiation, serious personal injury or death.

• Do not apply insulation to the top, or the upper 15" (38 cm) of the water heater, as this will interfere with safe operation.

• Do not cover the temperature & pressure relief valve.

• Do not cover the instruction manual. Keep it on the side of the water heater or nearby for future reference.

• Do obtain new labels from A.O. Smith for placement on the blanket directly over the existing labels.

THE HEATER MUST NOT BE LOCATED IN AN AREA WHERE IT WILL BE SUBJECT TO FREEZING.

LOCATE IT NEAR A FLOOR DRAIN. THE HEA TER SHOULD BE LOCATED IN AN AREA WHERE LEAKAGE FROM THE HEA TER OR CONNECTIONS WILL NOT RESULT IN DAMAGE TO THE ADJACENT AREA OR TO LOWER FLOORS OF THE STRUCTURE.

When such locations cannot be avoided, it is recommended that a suitable drain pan, adequately drained, be installed under the appliance.

WARNING

THIS WA TER HEA TER IS A CONDENSING UNIT AND REQUIRES A DRAIN TO BE LOCATED IN CLOSE PROXIMITY TO ALLOW THE CONDENSATE TO DRAIN SAFELY. THE CONDENSATE DRAINS FROM THE UNIT AT THE EXHAUST ELBOW LOCATED AT THE BOTTOM OF THE UNIT. NOTE: IT IS IMPORTANT THAT THE CONDENSATE HOSE NOT BE ELEVATED ABOVE THE EXHAUST ELBOW (SEE FIGURE 3). THE CONDENSATE BUILDUP WILL BLOCK THE EXHAUST OUTLET, WHICH WILL CAUSE IMPROPER OPERATION.

LOCATING THE HEATER

WARNING

THERE IS A RISK IN USING FUEL BURNING APPLIANCES SUCH AS GAS WATER HEATERS IN ROOMS, GARAGES OR OTHER AREAS WHERE GASOLINE, OTHER FLAMMABLE LIQUIDS OR ENGINE DRIVEN EQUIPMENT OR VEHICLES ARE STORED, OPERATED OR REPAIRED. FLAMMABLE V APORS ARE HEA VY AND TRA VEL ALONG THE FLOOR AND MA Y BE IGNITED BY THE HEA TER’S IGNITER OR MAIN BURNER FLAMES CAUSING FIRE OR EXPLOSION. SOME LOCAL CODES PERMIT OPERA TION OF GAS APPLIANCES IF INSTALLED 18 INCHES (46 cm) OR MORE ABOVE THE FLOOR. THIS MA Y REDUCE THE RISK IF LOCA TION IN SUCH AN AREA CANNOT BE AVOIDED.

FIGURE 3.

WARNING

DO NOT USE THIS APPLIANCE IF ANY P ART HAS BEEN UNDER WATER. IMMEDIATELY CALL 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 W ATER.

CLEARANCES

These heaters are approved for installation on combustible flooring in an alcove when the minimum clearances from any combustion construction are followed as indicated in Figure 4.

SERIOUS DAMAGE TO THE HEATER AND RISK OF FIRE OR EXPLOSION. IT CAN ALSO CREATE A RISK OF ASPHYXIA TION.

UNCONFINED SPACE

In all installations the minimum combustible clearances from any vent piping shall be 0". Vent piping passing through a combustible wall or ceiling must be a continuous run (no joints).

A service clearance of 24" (61 cm) should be maintained from serviceable parts such as relief valves, thermostats, cleanout openings, drain valves and venting connections.

Always disconnect electrical power before servicing the unit

*ILLUSTRATION OF MINIMUM COMBUSTIBLE CLEARANCES IN AN ALCOVE.

FIGURE 4.

HARD W A TER

Where hard water conditions exist, water softening or the threshold type of water treatment is recommended. This will protect the dishwashers, coffee urns, water heaters, water piping and other equipment.

See MAINTENANCE section for details of tank cleanout procedure.

In buildings of conventional frame, brick or stone construction, unconfined spaces may provide adequate air for combustion and ventilation.

If the unconfined space is within a building of tight construction (buildings using the following construction: weather stripping, heavy insulation, caulking, vapor barrier, etc.), air for combustion and ventilation must be obtained from outdoors. The installation instructions for confined spaces in tightly constructed buildings must be followed to ensure adequate air supply.

CONFINED SP ACE

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 IN OR WITHIN 12 INCHES (31 cm) OF THE ENCLOSURE TOP AND ONE IN OR WITHIN 12 INCHES (31 cm) OF THE ENCLOSURE BOTTOM. Each opening shall have a free area of at least one square inch per 1000 Btuh (2,203mm less than 100 square inches (645 cm²).

If the confined space is within a building of tight construction, air for combustion and ventilation must be obtained from outdoors. When directly communicating with the outdoors 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 Btuh (551mm enclosure. If horizontal ducts are used, each opening shall have a free area of not less than one square inch per 2000 Btuh (1,102mm enclosure.

/kW) appliances in the enclosure, but not

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

AIR REQUIREMENTS

KEEP APPLIANCE AREA CLEAR AND FREE OF COMBUSTIBLE MATERIALS, GASOLINE AND OTHER FLAMMABLE V APORS AND LIQUIDS.

DO NOT OBSTRUCT THE FLOW OF COMBUSTION AND VENTILATING AIR.

WARNING

FOR SAFE OPERATION PROVIDE ADEQUATE AIR FOR COMBUSTION AND VENTILATION. AN INSUFFICIENT SUPPLY OF AIR WILL CAUSE RECIRCULATION OF COMBUSTION PRODUCTS RESULTING IN CONTAMINATION THAT MAY BE HAZARDOUS TO LIFE. SUCH A CONDITION OFTEN WILL RESULT IN A YELLOW , LUMINOUS BURNER FLAME, CAUSING CARBONING OR SOOTING OF THE COMBUSTION CHAMBER, BURNERS AND FLUE TUBES AND CREATES A RISK OF ASPHYXIATION.

MECHANICAL EXHAUSTING OF ROOM AIR

Where an exhaust fan is installed in the same room with a heater, sufficient openings for air must be provided in the walls.

UNDERSIZED OPENINGS WILL CAUSE AIR TO BE DRAWN INTO THE ROOM THROUGH THE HEATER’S VENTING SYSTEM, CAUSING POOR COMBUSTION. SOOTING MAY RESULT IN

CHEMICAL VAPOR CORROSION

WARNING

CORROSION OF THE FLUE WAYS AND VENT SYSTEM MAY OCCUR IF AIR FOR COMBUSTION CONTAINS CERTAIN CHEMICAL VAPORS. SUCH CORROSION MAY RESULT IN FAILURE AND RISK OF ASPHYXIA TION.

Spray can propellants, cleaning solvents, refrigerator and air conditioning refrigerants, swimming pool chemicals, calcium and sodium chloride, waxes, and process chemicals are typical compounds which are potentially corrosive.

PRODUCTS OF THIS SORT SHOULD NOT BE STORED NEAR THE HEATER. ALSO, AIR WHICH IS BROUGHT IN CONT ACT WITH THE HEATER SHOULD NOT CONTAIN ANY OF THESE CHEMICALS. IF NECESSARY , UNCONT AMINA TED AIR SHOULD BE OBTAINED FROM REMOTE OR OUTSIDE SOURCES.

VENTING

WARNING

THE INSTRUCTIONS IN THIS SECTION ON VENTING MUST BE FOLLOWED TO AVOID CHOKED COMBUSTION OR RECIRCULATION OF FLUE GASES. SUCH CONDITIONS CAUSE SOOTING OR RISKS OF FIRE AND ASPHYXIA TION.

US DIRECT VENT

TO PREVENT EXHAUSTING PRODUCTS FROM CIRCULA TING TO THE AIR INTAKE IN WINDY/COLD AREAS, THE MAXIMUM PRACTICAL DISTANCE BETWEEN THESE TWO TERMINALS IS RECOMMENDED.

CANADIAN DIRECT VENT

CAUTION

FIGURE 5.

US HORIZONTAL VENT

TO PREVENT EXHAUSTING PRODUCTS FROM CIRCULA TING TO THE AIR INTAKE IN WINDY/COLD AREAS, THE MAXIMUM PRACTICAL DISTANCE BETWEEN THESE TWO TERMINALS IS RECOMMENDED.

CANADIAN HORIZONTAL VENT

CAUTION

FIGURE 6.

Heater must be protected from freezing downdrafts during shutdown periods.

WARNING

NEVER OPERATE THE HEATER UNLESS IT IS VENTED TO THE OUTDOORS AND HAS ADEQUA TE AIR SUPPLY TO A VOID RISKS OF IMPROPER OPERATION, FIRE, EXPLOSION OR ASPHYXIATION.

VENT PIPE TERMINATION

3"x 4" 45° PVC ELBOW WITH INT AKE GUARD

FIGURE 7.

NOTE: Before installing venting, determine place of vent pipe termination. See Figure 5 and 6 before proceeding.

CAUTION

DO NOT TERMINA TE THE VENTING WHERE NOISE FROM THE EXHAUST OR INTAKE WILL BE OBJECTIONABLE. THIS INCLUDES LOCATIONS CLOSE TO OR ACROSS FROM WINDOWS AND DOORS. A VOID ANCHORING THE VENT AND INT AKE PIPES DIRECTLY TO FRAMED W ALLS, FLOORS OR CEILINGS UNLESS RUBBER ISOLATION PIPE HANGERS ARE USED. THIS PREVENTS ANY VIBRATIONS FROM BEING TRANSMITTED INTO THE LIVING SPACES.

IMPORT ANT

The vent system must terminate so that proper clearances are maintained as cited in local codes or the current editions of the National Fuel Gas Code, ANSI Z223.1/NFPA 54 or the Canadian Electrical Code, CSA C22.1.

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

Plan the vent system layout so that proper clearances are maintained from plumbing and wiring.

W ARNING

WHEN THE UNIT IS TO BE SETUP AS A DIRECT VENT , THE INT AKE GUARD MUST BE REMOVED. THE INLET VENT PIPE MA Y THEN BE GLUED TO THE AIR INTAKE (see Figure 8) PROVIDED ON THE UNIT.

FIGURE 8.

DIRECT VENT TERMINAL INSTALLATION

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 HEATER and CLEARANCES, and with National Fuel Gas Code and local Codes.

IMPORT ANT

Plan the layout of the vent system backwards from the vent termination to the appliance.

WARNING

USE ONLY THE VENT TERMINALS SUPPLIED WITH THIS UNIT. TERMINATION OF A VENT SYSTEM WITH A DEVICE OTHER THAN THE SUPPLIED VENT TERMINATIONS WILL AFFECT SYSTEM PERFORMANCE AND RESULT IN A SAFETY HAZARD.

DIRECT VENTING

The air intake provided on the unit contains an intake guard, see Figure 7.

IMPORT ANT

THIS UNIT CONSISTS OF TWO VENT TERMINALS - AN INTAKE VENT TERMINAL AND AN EXHAUST VENT TERMINAL. THE INT AKE VENT TERMINAL IS A 3" 45° PVC ELBOW WITH A DOME SHAPE SCREEN AND THE EXHAUST VENT TERMINAL IS A 3" 45°PVC ELBOW WITH A MESH WIRE SCREEN.

NOTE: TO PREVENT EXHAUSTING PRODUCTS FROM CIRCULA TING TO THE AIR INT AKE IN WINDY/COLD AREAS, THE MAXIMUM PRACTICAL DISTANCE BETWEEN THESE TWO TERMINALS IS RECOMMENDED.

IMPORT ANT

WHEN LOCATING THE TERMINALS ON A SIDEWALL, THE FOLLOWING SPECIFICATIONS PERTAINING TO TERMINAL LOCA TION MUST BE FOLLOWED.

1. The intake vent terminal and the exhaust vent terminal must terminate on the same exterior wall and must be located at a minimum of 24" (61cm) from the vertical centerline of the exhaust vent terminal (see Figure 9). In colder climates increasing the 24" (61cm) minimum to 48" (122cm) will reduce possibility of frost over from side winds blowing exhaust vapors to the air intake of the direct the vent and is recommended for Canada.

2. The horizontal centerline of the intake vent terminal may not be located lower than the horizontal centerline of the exhaust vent terminal (see Figure 9).

FIGURE 9.

INSTALLATION SEQUENCE

For installations in the City of Los Angeles, California Category IV PVC Pipe such as that manufactured by Brownline Pipe Company, must be used as vent pipe material.

CAUTION

Vent terminals supplied with the heater must be used.

Slide the pipe through the wall and insert into coupling on the other side of the wall, making sure that the vent terminal ends up pointed in the correct position. See Figure 10.

EXHAUST VENT TERMINAL

NOTE: BEFORE BEGINNING INSTALLA TION OF ANY VENT PIPE READ THE VENT PIPE MANUFACTURER'S INSTALLATION INSTRUCTIONS.

1. After the points of termination have been determined, use the cover plates as templates to mark the holes for the vent pipes to be inserted through the wall. BEWARE OF CONCEALED WIRING AND PIPING INSIDE OF W ALL.

2. If the vent terminals are being installed on the outside of a finished wall, it may be easier to mark both the inside and outside wall. Align the holes by drilling a hole through the center of the template from the inside through to the outside. The template can now be positioned on the outside wall using the drilled holes as a centering point for the template.

3. A) MASONRY SIDE WALLS Chisel an opening approximately 1/2" (1.3 cm) larger than the marked circle.

B) WOODEN SIDE WALLS Drill a pilot hole approximately one quarter inch outside of the marked circle. This pilot hole is used as a starting point for a saws-all or sabre saw blade. Cut around the marked circle staying approximately one quarter inch outside of the line. (This will allow the vent pipe to easily slide through the opening. The resulting gap will be covered by the vent terminal cover plates.) Repeat this step on the inside wall if necessary.

4. Cut a length of PVC pipe about 3.5" (8.9 cm) longer than the wall thickness at the opening.

5. Glue the intake vent terminal to the section of the pipe.

6. Slide the wall plate over the pipe to stop against intake vent terminal.

7. Place a bead of caulking (not supplied) around the gap between the pipe and the wall. Place some of the caulking on the back of the plate to hold it against the wall after installation.

8. If the vent pipe is installed up to the wall, with a coupling on the end against the wall opening, the pipe with the vent terminal can be prepared for gluing before inserting through the wall.

INT AKE VENT TERMINAL

FIGURE 10.

VERTICAL VENT TERMINAL INSTALLATION

IMPORT ANT

WHEN TERMINATING THROUGH A ROOF, THE FOLLOWING SPECIFICATIONS PER T AINING TO TERMINAL LOCA TION MUST BE FOLLOWED.

1. Proper support must be provided for all pipe protruding through the roof.

2. The vertical roof terminations should be sealed with a plumbing roof boot or equivalent flashing.

3. The intake vent termination and the exhaust vent termination must penetrate the same side of roof.

4. The center line of the intake vent termination and the center line of the exhaust vent termination must be no closer than 24" (61cm).

5. The intake vent terminal and the exhaust vent terminal must be oriented facing downward and the same direction.

The specifications are displayed in Figure 11. NOTE: Exhaust vent terminal is installed using the same procedure.

INSTALLATION SEQUENCE

NOTE: BEFORE BEGINNING INSTALLA TION OF ANY VENT PIPE, READ “VENT PIPE PREPARATION” SECTION ON PAGE 12.

1. After the points of termination have been determined, use the cover plates as templates to mark the holes for the vent pipes to be inserted through the roof.

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