Instantaneous Oil-Fired Water Heater Operation and Maintenance Instructions OM-122DW MODEL IMPORTANT READ AND UNDERSTAND INSTRUCTIONS BEFORE INSTALLING OR USING THIS WATER HEATER. RETAIN INSTRUCTIONS 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.
SECTION A: SAFETY TIPS 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.
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OTHER PRECAUTIONS This unit is only for indoor use. Avoid its exposure to rain or moisture. Do not use for drinking or cooking until the water supply has been approved by local authorities. Hot water (or cold water) left in heat exchanger or piping for long period of time must not used for cook- ing or drinking.
SAFETY FEATURES Ignition Safety Device (Flame Sensor) The unit will automatically stop all operations if ignition fails or if the flame fails during combustion. ''WARNING'' lamp will light. Power Failure Recovery System If power fails during water heater operation the unit will turn off. When power resumes the unit will automatically reignite.
SECTION B: SPECIFICATIONS SPECIFICATIONS Model: OM-122DW Type: Combustion Type Pressure Vapor Flue Pipe Forced Flue Heating Supply System Instantaneous Source of Water Direct Connection to Main Supply Ignition: High Voltage Discharge Spark Fuel: ASTM D3699 1-K Kerosene, ASTM D396 Low Sulfur No.1 or No. 2 Fuel Oil, or ASTM D975 Ultra Low Sulfur Diesel (ULSD) Efficiency: Hot Water Input:...
CONTROL PANEL Temp Selector Knob Power Switch Operation Lamp Burner Lamp Warning Lamp 130° F POWER OPERATION BURNER WARNING VERY HOT COLD ON/OFF THERMOSTAT DIMENSIONAL OUTLINE Hot water Supply Outlet (NPT 3/4") Male Water Supply Inlet 3/16" (5mm) (NPT 3/4") Male 4-5/16"...
SECTION C: FUEL GUIDE The OM-122DW is designed for use with ASTM D3699 1-K Kerosene, ASTM D396 Low Sulfur No.1 or No. 2 Fuel Oil, or ASTM D975 Ultra Low Sulfur Diesel (ULSD) only. Use of low-quality oil will cause burner perfor- mance to drop, leading to abnormal combustion and reduced the unit life.
SECTION D: OPERATION FUELING WARNING: Use ASTM D3699 1-K Kerosene, ASTM D396 Low Sulfur No.1 or No. 2 Fuel Oil, or ASTM D975 Ultra Low Sulfur Diesel (ULSD) only. Never use gasoline, thinner, benzene, light oil or waste oil, or any other high volatile liquids. CAUTION: Make sure that the fuel is clean and free from dirt and water.
OPERATION ¡ Hotter water or high temperature setting increases the risk of scald injury. CAUTION: ¡ Thermostat has been set at factory to about 130°F. ¡ Risk of scald injury. When using a shower, feel the temperature of the water with your hand before getting under the water.
OPERATING AT HIGH TEMPERATURE CAUTION: Risk of scald injury. Before changing temperature setting make sure that the water heater is not being used by any of your family at any place in the house. ¡Seasonal change of water temperature from the main water source results in different hot NOTE: water temperature supplied.
LONG TERM INACTIVITY When you do not plan to use the unit for an extended period, the following procedures are recommend- 1. Turn the unit off. 2. Disconnect the power supply cord. 3. Close the fuel tank valve securely. 4. After closing the main water supply valve, open up all the faucets. 5.
SECTION E: ROUTINE MAINTENANCE INSPECTION AND MAINTENANCE WARNING: RISK OF INJURY FROM MOVING PARTS AND ELECTRICAL SHOCK. Disconnect the power sup ply cord before inspecting and servicing unit.All repairs should be left to professionals. RISK OF BACKFIRE AND INDOOR POLLUTION. Before operation make sure the flue pipe is free of snow, icing, leaves, bird's nest or strong drafts.
10. TEMPERATURE AND PRESSURE RELIEF VALVE (ONCE A MONTH) The temperature and pressure relief valve may become immovable at times due to corrosion of pipes or mineral deposits In the pipes. Pull up the lever of the temperature and pressure relief valve every month and make sure the valve is movable.
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PROBLEM CAUSE SOLUTION POWER LAMP FAILS Disconnected power supply cord Connect power supply cord. TO TURN ON WARNING LAMP Thermistor malfunction Consult your dealer. LIGHTS AFTER Out of water in heat exchanger Supply water. TURNING ON. Flame sensor malfunction Consult your dealer. Light is received on the receiving Consult your dealer.
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WHO IS COVERED: The original purchaser at retail. WHAT WE WILL DO: TOYOTOMI will either repair or replace, at its option, all defective parts free of charge that are covered by this limited warranty through the nearest authorized dealer or distributor of TOYOTOMI.