Installation Manual
Contents
1. Hole saw Install the inner flange and the flange gasket to the inner flue pipe and insert the inner flue pipe through the wall hole from inside the room Make sure the arrow on the inner flange is pointing up and secure the securing band with a screw and a nut through two holes of the fixing band Secure the inner flue pipe to the wall with the four screws provided with the unit Inner flange screw N X Inner flue pipe o Flange gasket Self tapping screw Nut Install the flange gasket to the outer flue pipe Secure the outer flue pipe to the wall by turning it clock wise This locks the two halves together NOTE Make sure to secure the outer flue pipe well Outer flue pipe Insert the flexible exhaust pipe to the flexible bent joint until it locks Insert the flexible bent joint to the exhaust opening of the inner flue pipe until it locks NOTE The flexible exhaust pipe and flexible bent joint have claws to prevent them from being sepa rated When connecting them raise the claws a little These claws may be raised already depending on production lots If this is the case insert them as they are Do not attempt to draw a pipe off in any event while the claw is raised Otherwise it could leak the exhaust gas Raise the claw a little ith pli the like Flexible with pliers or the like bent joint Inner flue pipe Flexible exhaust pipe Flexible bent joint Approx 3 mm 10 8 Slide2. Flexible exhaust pipe 1pc Part 20476492 CRIO p t Rubber joint Hose band 2pcs 2pcs Part 20476475 Parti20476477 31 3 4 57 805 1450mm 2 13 16 CAUTION Total length of the 71mm NOTE extension pipe between the water heater and the flue pipe must be no greater than 10ft with a total of three bends When using exten sion pipes always cover the exhaust pipe with the insulat ing cloth cover Extension pipe B 2pcs SN H he Ly 5 7 8 150mm L DA F 5 7 8 150mm V liz ua Bent joint 2pcs Part 20476461 L Aluminum tape 2pcs Extension pipe A 2pcs 92 13 16 j 071mm 33 1 2 850mm Self tapping screw 5pcs 2 3 4 970mm Pipe fixing bracket Insulating cloth cover i eda epos Part 20476455 Screw 4pcs Nut 4pcs CHIMNEY INSTALLATION ADAPTER KIT Part 20476430 Dia 5 Part 20476415 Dia 4 EXHAUST PIPE ADAPTER INTAKE PIPE TOP EXTENSION FLUE PIPE Part 20476486 9 1 2 240mm I NOTE This extension flue pipe is for use in wall thickness from 10 5 8 in 270mm to 18 1 8 in 460mm DIMENSIONAL OUTLINE Hot water Supply 5 1 8 5 1 8 ere piss 130mm 130mm E Y T O b E 2 Sja E io 19O o N Water Supply Inlet N NPT 3 4 Male Exhaust Outlet Air Intake Inlet 2 3 A 70mm G2 3 4 6 70
3. Install the unit on a noncombustible surface in a stable position If installing on a combustible floor the unit should be raised up off the floor to prevent contact with combustible materials by using brick con crete block or similar non combustible material If minimum clearances between the unit and combustible construction are maintained no ventilation openings are needed in the closet door when installed in a closet e UNIT INDOOR CLEARANCE Left side 6 in 150 mm ERIR a s more than 2ft Right side 6 in 150 mm 600mm Combustible Flue pipe top Rear side 6 in 150 mm ie n 2ft mors oe mm Front 2 ft 600 mm 600mm iocus inre mo From front door to closet 6 in 150 mm object nan on than on Top 2 ft 600 mm du gw e f the combustible material is protected with non combustible material such as 0 024 24 Go nisle a gage sheet metal with ventilated air space the following clearance is applied Left side 2 in BO mm Right side 2 in 50 mm Rear side 2 in 560 mm NOTE It is important to keep enough clearance for the purpose of maintenance repair and possible servicing We recommend the following clearance for servicing Left side 2 ft 600 mm Front 5 ft 1 5 m e FLUE PIPE OUTSIDE CLEARANCE From flue pipe top to combustible surface Vertical 24 in 600 mm From flue pipe top to combustible surface Horizontal 24 in 600 mm e EXTENSION EXHAUST PIPE From
4. Make sure the flue pipe is installed properly Make sure the fuel tank is installed properly Make sure there is no fuel leakage Make sure there is no water leaking from piping Plumbing Make sure electrical connections and grounding are wired properly Make sure the floor is stable and can withstand strong vibration and the weight of a full water heater Make sure the area is free of flammable materials Check for air trapped in fuel lines OPERATION Open the fuel supply valve Set the hot water temperature on the control panel Press the power switch on the control panel to turn on Power lamp goes on Open hot water faucet and unit will ignite in a few seconds 12 13 SECTION E CHIMNEY INSTALLATION This unit is a sealed combustion system and as an installation option it may be connected directly to a chimney Using this option room air is used for combustion and the exhaust gases are vented into the chimney to the outside IMPORTANT 1 This appliance should be installed by a licensed authorized person s due to necessity of making electrical water and fuel connections Check local codes and ordinances and or the latest edition of the National Fire Protection Association Standard for the Installation of Oil Burning Equipment NFPA 31 2 A Barometric Draft Regulator must be used in the exhaust pipe to stabilize flue draft It is required that a UL listed Underwriters Laboratories damper be used The Barome
5. Select a place which is free of combustible substances The surrounding walls should be finished with noncombustible materials concrete block mortar or plaster are allowable The floor on which the water heater is installed must prevent intensive vibrations or shock and must be strong enough to bear the weight of the water heater Select a place where proper maintenance and control can be provided for the unit after installation Select a place sheltered from weather Install the unit on a noncombustible surface in a stable position If installing on combustible floor the unit should be raised off the floor to prevent contact with combustible materials It is important to keep enough clearance for the purpose of maintenance repair and possible servicing The flue pipe is free of snow icing leaves bird s nest or strong drafts Before making a hole in your wall for the flue pipe make sure the area is free of electrical wires gas pipes and other obstacles TOOLS NEEDED FOR INSTALLATION Tool Use Phillips Head Screwdriver Installation of flue pipe etc Electric Drill Drilling hole in wall for flue pipe Hole Saw 4 3 4 diameter Making hole in wall for flue pipe Pipe Wrench Connecting fuel pipe FUEL TANK INSTALLATION The fuel tank must be purchased separately and installed by a qualified fuel supply technician NOTE Fuel tank installation must comply with National Fire Protection Association Code NFPA 31 or local ly
6. il MiSer By TOYOTOMI Instantaneous Oil Fired Water Heater Installation Manual MopEL OM 148 Type D m LISTED IMPORTANT THIS APPLIANCE SHOULD BE INSTALLED BY A LICENSED AUTHORIZED PERSON S DUE TO THE NECESSITY OF MAKING ELECTRICAL WATER AND FUEL CONNECTIONS RETAIN THIS MANUAL FOR FUTURE REFERENCE CHECK LOCAL CODES AND ORDINANCES FOR PERMITTED USE CAUTION THIS WATER HEATER SHALL NOT BE USED FOR COMMERCIAL USE OR FOR ANY PURPOSES OTHER THAN HOT WATER SUPPLY USES OTHER USAGE MAY CAUSE A MALFUNCTION OR SHORTEN ITS SERVICE LIFE DO NOT REMOVE THE RATING PLATE AND LABELS FROM THE WATER HEATER UNIT CONTENTS SECTION A Temperature and Pressure Relief Safety Tips for Installation Pr Pm 1 Valve Installation V RdUrA dE AE Ra RES E dE 9 a dada st 6 Permanent Wiring Installation 6 6 SECTION B Plumbing MH 7 Unpacking ee Ew 979 97 9 89 87 E EORR E RORIS cU E 2 Installation of Unit and Flue Pipe RETI 9 Standard Installation Parts OUTPUT 2 Accessory Parts eee eee CC ee ee ean are 2 SECTION D Dimensional Outline DEAE EUREN IEEE ES 3 Test Run Preparation Teeter eee EIUS LLLI 12 SECTION C Operation HH 15 Installation Selecting a Location 88 ee ae eerie wi ee ere 6079 8 6 8 8 QR 0 0 0 9 70 0 0 4 SECTION E Tools Needed for Installation 2899 v9 eee ee ee 4 Chimney Installation ev ewe Wie te wens cheese bie C E CE TU be ETE 13 Fuel Tank Installation 38 8 5878 0 0998 9 678 0 09 8870 N 5 Removing Air
7. ASTM D396 Low Sulfre No 1 or No 2 Fuel Oil or ASTM D975 Ultra Low Sulfur Diesel ULSD Rated Filtering Capacity 2 GPH Minimum The fuel supply tank must be positioned as to allow gravity feed to the unit and high enough to reduce trapped air in the fuel line Please refer to Section D page 8 in the Operation and Maintenance Instructions for the procedure to remove trapped air k NOTE If the maximum height is exceeded a fuel pressure limiting valve is required Part No 10005099 has 3 8 in N P T inlet and outlet female openings to accept the fuel line fittings NOTE Fusible Link Valve 410005597 e t is most important that the valve depending on its use be fully opened or fully closed e The top nut on the valve below the turn handle is sealed and should never be tightened or removed e When installing fuel lines to the valve be sure to check for fuel leakage e A LEAKING VALVE SHOULD ALWAYS BE REPLACED Outdoor fuel tank Tank vent LN E S filter ICAI LUST Dai C A Fusible link valve n Shut off valve E a Shut off valve a 3 8in OD copper tubing REMOVING AIR TRAP When operating for the first time or when refueling an empty tank air may be trapped in the fuel line mak ing ignition difficult In this situation after removing the trapped air thoroughly from the fuel filter at the fuel tank outlet follow the procedures below 1 Press POWER SWITCH to OFF position Disc
8. applicable codes Check with local building officials The following instructions should be followed for installation of a large capacity gravity fed fuel tank e Installation height of tank s fuel outlet should be at least 16 in above floor surface upon which the water heater rests To avoid excess fuel pressure to water heater the top of fuel tank should be no more than 8 1 2 ft above the bottom of the unit The inlet fuel pressure must not exceed 2 5 PSI If the inlet pressure exceeds 2 5 PSI a pressure reducer Part 10005099 must be used e Fuel tank should be located at least 6 ft away from all heat sources e 3 8 OD copper tubing should be used for the fuel line e To prevent air locks in the fuel line the fuel line should be smooth with no inverted U shaped line or sharp bends Install a UL listed fuel filter at the fuel tank outlet Shut off valves should also be installed on the fuel line and connected to the tank as shown below Unit should have a separate fuel line from fuel tank NOTE An additional shut off valve installed next to the exterior wall will minimize the amount of fuel to be drained should the water heater need to be disconnected If the valve is inside the building a fusible link type Part 410005597 is recommended All external tank must be vented Install a UL listed fuel filter at the fuel tank outlet Specifications required of this fuel filter are as follows Type of Fuel ASTM D3699 1 K kerosene
9. the insulating cloth cover over the flexible exhaust pipe and the flexible bent joint Insulating cloth cover 9 Remove the screw from the exhaust opening of the unit Insert the flexible exhaust pipe to the exhaust Opening and secure them with the screw NOTE Seal all connections of the pipes with the aluminum tape CAUTION Do not attempt to insert the exhaust pipe forcibly e f O ring is damaged it could cause the leakage of exhaust gas e f the exhaust pipe is inserted after raising the claw the pipe is locked in position with the claw so that the pipe will become unable to remove e f it is attempted to remove forcibly the exhaust pipe may be broken 10 Connect rubber joints to the both ends of the inlet hose Rubber joint Rubber joint Inlet hose CON Place the hose bands on the rubber joints and attach the hose as shown below Tighten the bands 11 Hose band Hose band 11 10 1 2 in 270 mm maximum Inner flue pipe 1 Hose band Rubber joint 4 10 1 2 in Flange gasket Insulating cloth cover 100 270 mm NE Xm Outer flue pipe EE PP EE eremi Tight band TS Inner sleeve flange SS D oad A Inlet hose Rubber joint 4 S Aluminum tape WHE a Horeband Flexible exhaust pipe tO 14 1 2 17 in 370 430 mm T1 Exhaust pipe ring SECTION D TEST RUN PREPARATION S E IE eS YS Poe pol
10. Trap reer et ee ee eee ee ee ee eee ae eee 6 SECTION A SAFETY TIPS FOR INSTALLATION BE SURE TO FOLLOW THE FOLLOWING INSTRUCTIONS The instructions which are contained in this manual are classified into the following two types which are WARNING and CAUTION These instructions are intended to provide important information for safe operation WARNING indicates the possibility of causing the user a fatal accident or serious injury if the water heater is incorrectly operated CAUTION indicates the possibility of causing the user injuries or material damages if the water heater is incorrectly operated A WARNING 1 Never use any fuel other than ASTM AMERICAN SOCIETY FOR TESTING AND MATERIAL D3699 1 K Kerosene D396 Low Sulfur No 1 Fuel Oil or ASTM D975 Ultra Low Sulfur Diesel ULSD You are rec ommended to use the low sulfur fuel NEVER USE GASOLINE Use of such fuels can result in an explosion and or fire and cause injury 2 Improper installation adjustment modification or service and maintenance by an unauthorized person may cause SERIOUS UNIT DAMAGE BODILY INJURY HAZARD OR PROPERTY DAMAGE This unit should be installed by a licensed authorized person s due to the necessity of making electrical water and fuel connections Refer to the installation manual and the operation and maintenance instructions for assistance or consult your dealer for further information 3 HAZARD OF ELECTRICAL SHOCK Before removing any ac
11. cess panels of water heater for service make sure the electrical supply to the water heater is shut off Failure to do this may result in HAZARD SERI OUS BODILY INJURY OR PROPERTY DAMAGE 4 Check and comply with all local state and ANSI Z21 22 codes that may apply to water heater s before beginning the installation 5 This water heater is designed to be used no more than 4 922 FT 1 500 m above sea level When the water heater is installed with the flue pipe at altitude of higher than 1 640 FT 500 m 4 922 FT 1 500 m above sea level or is installed with the chimney adapter at altitude of higher than 3 280 FT 1 000 m 4 922 FT 1 500 m adjustments are needed Ask your local dealer The water heater may have a failure of combustion at a high altitude 6 RISK OF INDOOR AIR POLLUTION AND FIRE Be sure the exhaust pipe is properly installed and connect ed Aluminum tape provided may be used for sealing exhaust pipe connections CAUTION 1 Keep the area around the unit clean and free of flammable materials 2 RISK OF FIRE AND ELECTRIC SHOCK Do not apply any excessive force or pressure to the power supply cord Make sure the plug is free of dust Be sure plug fits the receptacle securely 3 Install a temperature and pressure relief valve on the installation mouth in accordance with local state and ANSI Z21 22 codes See the page 6 for more details 4 When No 2 fuel oil is used in an area where the temperature becomes l
12. ess than 25 F 4 C it is recom mended the use of an additive with the fuel to prevent congealing Check with a fuel supply company for the proper additive and mix SECTION B UNPACKING 1 Unpack the unit carefully 2 Check to see if there are any loose screws that may have occurred in transit 3 Take accessories and the instruction manual out of the carton UNPACKING STANDARD INSTALLATION PARTS The following standard installation kits are available Outside venting Use Flue Pipe Installation Kit Part 20476440 e Chimney Venting Use Chimney Installation Adapter Kit Part 20476430 Dia 5 20476415 Dia 4 For alternate installation methods you may need to purchase additional accessories which are available from your dealer FLUE PIPE INSTALLATION KIT Part 20476440 Inner flange Part 20476468 Outer flange 03 15 16 Part 20476469 2100mm 2 13 16 2 3 4 071mm 070mm 50mm Flange gasket t 5mm 2pcs Part 20476471 33 1 2 850mm E CL Aluminum tape Insulating e w 30mmx500mm cloth cover 1pc Part 20476455 Self tapping screw 8pcs Self tapping screw for concrete 8pcs ACCESSORY PARTS OPTION EXTENSION PIPE KIT Part 20476496 2pcs Outer flue pipe 1pc Inner flue pipe 1pc Part 20476401 39 3 8 1000mm OD Inlet hose 3 975mm Part 20476451 Nut 2pCs Screw 9 7 8 13 3 4 350mm Flexible bent joint 1 pc
13. extension exhaust pipe to combustible surface Vertical 3 in 76 mm From extension exhaust pipe to combustible surface Horizontal 3 in 76 mm Check local codes regarding installation of the water heater water piping and fuel tank INSTALLATION OF FLUE PIPE IMPORTANT Check and comply with all state and local codes that may apply to water heater before begin l 2 hi ning installation Select unit location Allow clearances as indicated above between the unit and all other materials Make sure that the outside area to where the flue pipe will reach is clear of any objects NOTE For wall thickness greater than 10 1 2 inches a flue pipe extension is available See page 2 for details Flue pipe can be installed through any standard building materials Please ask your local dealer or distributor for more details For standard installation position the hole for the flue pipe NOTE The water heater should be installed on a sturdy floor that is level and flat Cut the hole for the flue pipe from inside the room Use a 4 3 4 diameter hole saw attached to an elec tric drill The opening on the inside wall should be slightly higher than the outside opening approxi mately 1 4 so that the flue pipe will slope slightly downward approximately 3 degrees after it is installed This will enable condensed moisture to drain from the flue pipe to the outside and prevent rain or snow from entering from outside after installation Indoor
14. l the OM 148 An ANSI listed temperature and pressure relief valve should be installed at the hot water outlet connection of the heater at the time of installation Local codes should govern the installation of the relief devices See page 6 for a temperature and pressure relief valve specifications If a check valve or one way valve is required on the cold water supply line it is recommended that an expansion tank 100 psi 8 gal Min should be installed on the hot water supply line When the unit is to be installed as a replacement water heater it is important to determine whether a check valve has been installed or not Remove the check valve before installation of the unit unless a check valve is required by local code In order to prevent the water heater from being damaged or developing a leak regardless of being used in a cold warm or hot region the cold water supply piping hot water supply pip ing drain pipe check valve valves expansion tank and temperature and pressure relief valve should be protected with sufficient insulation materials by wrapping with heat insulation or by equipping with a freeze prevention heater 1 A water softener is recommended in regions where hard water may be a concern 2 Usethe following water quality Maximum Levels 6 5 to 8 5 50 mg L 150 mg L 2 mg L 3 Do not apply any heat to the unit nipples 4 Use standard copper alloy unions and nipples for the connections to the unit 5 Copper
15. line is installed to allow complete drainage for the device and line Note Manual operation of pressure relief valves should be done at least once a year PERMANENT WIRING INSTALLATION WARNING RISK OF FIRE AND ELECTRIC SHOCK Make sure the power supply cord is disconnected to avoid any electric shock before servicing Electric shock may cause serious injury It is recom mended that installation should be conducted by a licensed electrician BE SURE TO FOLLOW THE FOLLOWING PROCEDURE POWER SOURCE 120V AC 60Hz single phase 1 Disconnect power supply cord from power source 2 Remove four 4 screws and junction box cover on the left side of unit 3 Disconnect ground wire green from the power supply cord bracket 4 Disconnect two power supply wires from upper side of the terminal 5 Squeeze strain relief with the adjustable pliers to remove plas tic bushing from the unit Remove the power supply cord 6 Replace the strain relief bushing to the power supply cable and insert the cable into the hole of the left side of unit Connect the ground wire to the power supply cord bracket and power wires to the terminal 7 Affix the junction box cover to the unit and insert screws PLUMBING COLD AND HOT WATER PLUMBING WARNING Plumbing should conform to proper plumbing methods and in conformance with local codes CAUTION or regulations A licensed plumber familiar with local codes and ordinances should instal
16. mm Access Cover Temperature and 12 5 8 320mm Pressure Relief Valve E a Installation Opening AL much H NPT 3 4 Female rm T Front Panel a E LO pm O gt co e LO N N ep CN zd YE ce o a O O Junction Box Drain Outlet NPT 1 2 Male SECTION C INSTALLATION WARNING This unit must be installed in accordance with these instructions local codes ordinances and or in the absence of local codes the latest edition of the national fire protection association NFPA31 code Check and comply with all state local codes and ANSI AMERICAN NATIONAL STANDARD INSTITUTE Z21 22 that may apply to water heater s before beginning the installation This unit should be installed by a licensed authorized person s due to the necessity of making electrical water and fuel connections SELECTING A LOCATION CAUTION When No 2 fuel oil is used in an area where the temperature becomes less than 25 F 4 C it is recommended the use of an additive with the fuel to prevent congealing Check with a fuel supply company for the proper additive and mix Select a place to install the water heater where water and electric supply are easily available NE A SY Ss 10 11 12 Select a place which is free of moisture water spills pools or snow Select a place which draining can be done easily Select a place which the fuel tank can be installed safely
17. n Page 10 of the instruction manual e Do not use the unit as an auxiliary heat source for a solar hot water heater nor hydronic heating INSTALLATION OF THE UNIT AND FLUE PIPE SAFETY TIPS WARNING 1 The flue pipe opening must be fully exposed to outside air Do not vent into a garage basement under the floor or into any enclosed area 2 Do not install the flue pipe in close proximity to other objects or materials 3 Before making a hole in your wall for the flue pipe make sure the area is free of electrical wires gas pipes and other obstacles 4 Do notinstall the flue pipe where it will be exposed to heavy snow collected leaves or strong winds IMPORTANT In areas of heavy snow fall ground surface clearance must be increased according to average snow falls In open areas with strong wind a wind breaker may be necessary 5 Do not install the flue pipe below the water heater 6 The exhaust pipe should be properly installed and connected Aluminum tape may be used for sealing exhaust pipe connections 7 Always cover the exhaust pipe with the insulating cloth cover 8 If installed in building without an eave a non combustion eave should be installed CAUTION Total length of the extension pipe between the water heater and the flue pipe must be no greater than 10 ft with a total of three bends NOTE When using extension pipes always cover the exhaust pipe with the insu INSTALLATION OF UNIT 1 lating cloth cover
18. onnect the power supply cord 2 Tocatch the fuel which will drain out put a small container under the strain er 3 Loosen the screw on top of the strainer Immediately wipe off any spilled fuel 4 Remove the trapped air thoroughly Failure to remove all the air will cause improper ignition and may extinguish the unit 5 Tighten the screw after removing trapped air 6 Plug into the receptacle Press POWER SWITCH to ON position NOTE In the event of an ignition failure press POWER SWITCH to OFF position and after 10 seconds press POWER SWITCH to ON position once again TEMPERATURE AND PRESSURE RELIEF VALVE INSTALLATION At the time of installation a temperature and pressure relief valve complying with the standard for Relief valve for Hot Water Supply System ANSI shall be installed in the threaded opening provided on the water heater for the temperature and pressure relief valve Local codes should govern the installation of the relief devices Specifications required of this temperature and pressure relief valve are as follows Inlet male 3 4 in Temperature relief 210 F Pressure relief setting 150PSI Rated capacity Min 148 000 BTU H a No other valve is placed between the relief valve and the water heater b Discharge from the relief device is routed to a suitable place for disposal when relief occurs c No reducing coupling or other restrictions are installed in discharge line d Discharge
19. piping is recommended for the hot water supply line Note Refer to local codes when considering piping materials Steel piping is not recommended as it may cause rust in the piping Use NPT for piping of hot and cold water 6 Connecting plumbing to the unit hold unit fittings securely with a wrench to prevent damage to the unit 7 Installation of a water strainer and the air release valve is recommended 8 The distance between the water heater and places where hot water is used should be as short and direct as possible and a uniform pipe size of sufficient diameter to carry the full capacity of hot water should be used 9 Be sure to connect the water inlet and the hot water outlet as shown on the water heater Reversing the two connections will damage the unit 10 When hot water flows through the supply line there is an inevitable heat loss regardless of type of water heater Thus insulation or protection of hot water piping is encouraged 11 Flush the piping before connecting to the unit Plumbing Example Air release valve lt Cold water supply line lt Strainer Hot water supply line lt _ lt _ tS V A T 1 Water A supply N E valve Shower Room Kitchen Temperature L and pressure X Shower relief valve Cold and hot water mixing faucet A XK Non combustible material ee ne l p 7 7 NY orn f Nl CAUTION Do not allow pipes or valve to freeze e Refer to PREVENTING FREEZE UP o
20. r material 3 Fora chimney installation use accessory option parts Chimney Installation Adapte Kit Part 20476430 Dia 5 or Part 20478415 Dia 4 Installation of Chimney Example Chimney Liner Exhaust Pipe Adapter Outside Air Intake Opening 77 Vda NN INSTALLATION OF EXHAUST PIPE ADAPTER Remove the screw from the exhaust outlet of the unit Insert the Exhaust Outlet exhaust pipe adapter to the exhaust outlet and secure with the SCrew Exhaust Pipe Adapter Fig 2 INSTALLATION OF INTAKE PIPE TOP Insert the intake pipe top to the intake opening of the unit Intake Pipe Top Intake Opening Fig 3 TOYOTOMI U S A INC 604 Federal Road Brookfield CT 06804 www toyotomiusa com This manual supersedes earlier editions PART No 20476691 Printed in Japan Rev 3 09 4731003052
21. tric Draft Regulator must be installed in accordance with NFPA 31 3 Installation in an unconfined space in buildings of conventional frame brick or stone construction infiltration normally is adequate to provide air for combustion and ventilation For confined spaces openings for air intake and venting must be provided See Fig 1 Check local codes and ordinances and or NFPA 31 Code for specific details 4 It is recommended that the OM 148 hot water heater be connected to an independent chimney flue CAUTION 1 In case another appliance is connected to the same chimney flue 2 or more units it may be necessary to comply with state and local codes Check with your local dealer or licensed installer 2 Connecting the OM 148 hot water heater with two or more appliances using the same chimney flue may affect the performance of the hot water heater Check with your dealer for other installation options 3 Total length of the exhaust pipe and the chimney liner must be no greater than 25 ft Maintain the shortest piping possible by selecting a location as close as posssible to the chimney NOTE 1 To prevent against exhaust leaks make sure all connections are properly fitted and seal connection with aluminum tape or heat resistant sealing material 2 A 5 inch or 4 inch diameter exhaust pipe is used for a chimney installation To prevent injury due to the hot surface of the exhaust pipe be sure to wrap the exhaust pipe with a heat insulato
Download Pdf Manuals
Related Search