Toyotomi FB-38N Troubleshooting guide

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Kerosene-Fired Water Heater
Operation and Maintenance Instructions
MODEL FB-38N(FS)/FB-52N(FS)
[CONTENTS]
SECTION A: Inspection before Operation................ 11
Safety Tips..................................2 Operation............................................ 12
Safety Features...........................4 Turning Unit Off…............................... 12
Adjusting Water Temperature.............. 12
SECTION B: Differential Switch and Dip Switch....... 13
Specifications..............................5 Preventing Freeze Up.......................... 13
Dimensional Outline....................6 Long Term Inactivity............................ 13
Remote Control...........................7
Construction................................8 SECTION E:
Routine Maintenance
SECTION C: Inspection and Maintenance................ 14
Fuel Guide.................................. 10 Inspection and Maintenance Items...... 14
SECTION D: SECTION F:
Operation Troubleshooting
Fueling........................................ 11 Error Code in Display.......................... 17
Removing Air Trap...................... 11 Wiring Diagram................................... 18
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 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.

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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 the
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.
WARNING
1. Never use any fuel other than water-clear kerosene. NEVER USE GASOLINE! Use of
such fuels can result in an explosion and/or fire and cause injury.
2. Never store flammable liquids or materials such as gasoline near the unit.
3. This unit should be installed by a licensed, authorized person(s) due to the necessity of
making electrical, water and fuel connections.
4. RISK OF BACKFIRE AND INDOOR AIR POLLUTION. Before operation make sure exhaust
pipe is free of snow, icing, leaves, bird’s nest or strong drafts.
5. RISK OF INDOOR AIR POLLUTION AND FIRE. Be sure the exhaust pipe is properly
installed and connected. Aluminum tape may be used for sealing exhaust pipe connections.
6. RISK OF INJURY FROM MOVING PARTS AND ELECTRICAL SHOCK. Disconnect power
cord before servicing unit.
7. This water heater is designed to be used no more than 1,300 m above sea level. The water
heater may have a failure of combustion at a high altitude.
Ask your local dealer for using at altitudes higher 800 m ~ 1,300 m above sea level.
CAUTION
1. Do not use the water heater without circulating water in the heat exchanger. Routinely
make sure if the circulation water has decreased.
2. Do not touch hot areas, the exhaust pipe or the exhaust pipe top.
3. Never place any combustibles on or around your water heater.
4. Never place or use any flammable dangerous substances, such as gasoline and thinner, on
or around your water heater. Also never use your water heater in a location where
flammable gas is generated.
5. Do not use the water heater in the event of failure or breakage. A faulty repair or
modification can be dangerous.
6. Do not damage, bundle, strain, or place heavy objects on the power cord. Never yank the
cord to unplug it.

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7. Insert the plug securely into the outlet as far as it will go. Do not use a damaged plug or
loosened outlet. Do not remove or insert the plug with wet hands.
8. When you may not use it for a long period of time, turn off the operation switch, securely
close the fuel feed valve of the fuel tank, and then remove the power cord plug from the
outlet. When restarting the water heater, first check to be sure that circulating water is
provided. Then, insert the power cord plug into the outlet, open the fuel feed valve of the
fuel tank and turn on the power switch.
9. Remove the plug from the outlet and remove dust (and metal) from the plug. Accumula-
tion of dust may cause defective insulation due to moisture, which could pose a fire hazard.
OTHER PRECAUTIONS
1. If the water heater is installed outside, the exhaust pipe top (optional parts) must be used.
2. If the unit appears to be operating abnormally or in an emergency, turn off the unit and call
an authorized service person.
3. The circulating water should contain proper quantity of antifreeze solution. Avoid the use of
hard water. In regions where hard water is the only source, take advantage of a water
softener.
4. Do not use a damaged unit. If repairs are needed, contact your dealer.
5. Keep the area around the unit, the fuel tank and the exhaust pipe clean and free of
flammable materials.
6. If you plan to be away from your home for a long period of time, shut-off the fuel valve on
the fuel tank. Press operation switch to “OFF” position and disconnect the power supply
cord.
7. If the unit is not used for a long period of time, the fuel tank may contain water cause by
condensation. Be sure to check all filters and fuel strainers for this condiners for this
condition, clean or replace filter elements before using the unit..
8. Make sure that there are no leakage in fuel pipe and water circulation pipe.
9. Use the power source AC230, 50Hz only.
10. The unit must be installed at a place where there is enough air for combustion.
11. Plug on the power supply cord is disconnective device. The socket-outlet shall be installed
near the water heater and shall be easily accessible.

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SAFETY FEATURES
NOTE: When a safety device is activated, the water heater is automatically extinguished. At
this time, the error code is indicated on the digital display. When your water heater
does not operate properly after you take remedies for the error correction, contact your
dealer.
1. Ignition Safety Device (Flame Sensor)
The unit will automatically stop all operations if ignition fails or if the flame fails during
combustion. “E” and “6” or “E” and “7” will flash in the display alternately.
2. Over Heat Protector
In order to prevent burns, the over heat protector automatically stops all operations if the
water in the heat exchanger reaches abnormally high temperatures due to temperature
controller malfunction. “E” and “4” will flash alternately
3. Power Failure Recovery System
If power fails during water heater operation the unit will turn off. When power resumes the
unit will automatically reignite.
4. Tip-over Switch
When the unit senses an earthquake or shock, this device activates to stop the operation.
“E” and “5” will flash alternately.
5. Fuel Strainer
Special strainer catches any dirt or impurities present in the fuel before it is sent to the
burner.
6. Heat Exchanger Bi-Metal Switch
If the heat exchanger temperature is raised abnormally
because of a malfunctioning thermostat, the burner is
automatically extinguished and “E” and “9” will flash
alternately. Press the POWER SWITCH again after
pressing the Reset button of the Heat exchange bi-metal
switch.
CAUTION: Disconnect the power cord before servicing
unit.
RISK OF BURN INJURY. Do not touch the
heat exchanger while in hot.
7. Thermal Fuse
If the inside temperature of the water heater is raised abnormally, the unit is automatically
extinguished and “E” and “9” will flash alternately. If this safety device is activated,
disconnect the power cord and contact your dealer.

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SECTION B:
SPECIFICATIONS
SPECIFICATIONS
Model: FB-38N(FS) / FB-52N(FS)
Type: - Combustion Type Pressure Vapor
- Exhaust system Forced Exhaust type
- Purpose Floor Heating
Ignition: High Voltage Discharge Spark
Fuel: Kerosene (Paraffin)
Fuel Consumption: 4.2 L/h / 5.85 L/h
Efficiency: 87.0%
Heating Output: 128,300 BTU/h / 179,000 BTU/h
(37.6 kW) / (52.4 kW)
Capacity of Heat Exchanger: 19.5 lit. / 25 lit.
Max. Pressure: 100 kPa
Thermal Conduction area of 0.9 m2 / 1.0 m2
Heat Exchanger:
Dimensions (W x D x H): 320 x 570 x 816 mm / 320 x 570 x 983 mm
Weight: 35 kg / 37 kg
Electrical Rating: AC230 V, 50 Hz
Ignition: 106 W / 138 W
Burning: 86 W / 129 W
Operating Ambient Temperature: -20°C ~ 40°C
Humidity: 90 % (At the condition without dew condensation)
Exhaust Air Temperature: less than 260°C
Diameter of Required Exhaust Pipe: φ106 mm
Sound Pressure Level: 48 dB (A) / 5 dB (A)
Nozzle - Quantity of Vapor: 1.10 GPH / 1.35 GPH
- Spraying Pattern: Danfoss KH
- Spraying Angle: 60°
Electric Current Fuse: 250V AC, 5A
CE Marking - Low Voltage Directive: 2006/95/EC
- EMC Directive: 2004/108/EC
Safety Device: Ignition Safety Device, Over-heat Protector,
Power Failure Recovery System, Fuel Strainer,
Heat Exchanger Bi-metal Switch, Tip-over Switch
Thermal Fuse
Accessories: Exhaust Pipe Top (1), Rubber Fuel Pipe (1),
Hose band (2), Remote control (1), Remote
Controller Cord (3m), Adhesive Tape (2),
Wooden Screw (2), Screw (2)

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DIMENSIONAL OUTLINE
FB-38N(FS)

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FB-52N(FS)

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REMOTE CONTROL
POWER LAMP - constant: In operation
- extinction: Shutdown
BURNER LAMP - constant: In operation
- extinction: Extinguished
POWER SWITCH: Turns the unit on or off.
TEMP SELECT BUTTON: Digit will change from “1” to “9” by pressing
button (UP).
Digit will change from “9” to “1” by pressing
button (Down).
Adjusts the temperature of the circulating water;
1: Approx. 20°C 6: Approx. 55°C
2: Approx. 30°C 7: Approx. 60C
3: Approx. 40°C 8: Approx. 70°C
4: Approx. 45°C 9: Approx. 80°C
5: Approx. 50°C
EXTERNAL INPUT LAMP: You can connect the optional external input terminal
lead wire. When connecting the unit to the external
input terminal, input status will be displayed.
Power Switch
Tem
p
Select Button
(
UP
)
Tem
p
Select Button
(
Down
)
Power Lam
p
Burner Lam
p
External In
p
ut Lam
p
Dis
p
la
y

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CONSTRUCTION
FB-38N(FS)
FB-52N(FS)

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SECTION C:
FUEL GUIDE
The Water Heater is designed for use with water clean and high quality kerosene only. Use of
low-quality kerosene will cause burner performance to drop, leading to abnormal combustion
and reduced the unit life.
Always store your fuel in a separate area from where you store gasoline for your power
equipment to avoid accidental use of gasoline in your water heater.
What to Buy...
ALWAYS: Clean and high-quality KEROSENE.
ALWAYS: Fuel free of contaminants, water or cloudiness.
NEVER: Gasoline, alcohol, white gas, camp stove fuel or additives.
NEVER: Yellow or sour-smelling fuel.
How to Store It...
ALWAYS: Store in a clean container, clearly marked “KEROSENE.”
ALWAYS: Store away from direct sunlight, heat sources or extreme
temperature changes.
NEVER: In a glass container, or one that has been used for other
fuels.
NEVER: For longer than six months.
NEVER: In the living space.
Why It is Important...
Pure, clean kerosene is essential for safe and efficient water heater
operation. Poor quality or contaminated kerosene can cause:
- Excess tar deposits on burner and flue pipe
- Incomplete combustion
- Reduced unit life
Use of a highly volatile flammable fuel such as gasoline can produce uncontrollable flames,
creating a severe fire hazard.