
The Toyotomi BS-36UFF is an on-demand oil-fired hot water heater. It is designed for indoor use and uses ASTM No. 1-K Grade kerosene or No.1 fuel oil only. While the nozzle on the unit rarely needs replacement, the ignition, which is commonly connections, clean spark tips, points set right, and a good transformer, may be the issue. To bleed the fuel line, you can loosen the screw on the top of the strainer to bleed any air out of the line. This article will further explain how to bleed the fuel line for the Toyotomi BS-36U.
How to bleed fuel line for Toyotomi BS-36U
| Characteristics | Values |
|---|---|
| Fuel Type | ASTM No.1-K Grade Kerosene or No.1 Fuel Oil |
| Fuel Warning | Never use gasoline, thinner, benzene, light oil or waste oil |
| Fuel Caution | Ensure fuel is clean and free from dirt and water |
| Troubleshooting | Check/clean strainer/filter for fuel |
| Troubleshooting | Loosen screw on top of strainer to "bleed" air out of the line |
| Troubleshooting | Check vent for blockage |
| Troubleshooting | Check for spark |
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What You'll Learn

Check the strainer and filter for the fuel
To check the strainer and filter for the fuel, locate the strainer and identify the screw on top of it. Place a rag under the screw and loosen it to "bleed" any air out of the line. This process will help to release trapped air in the fuel line, ensuring a smooth flow of fuel to the engine.
It is important to regularly check and clean the strainer and filter to prevent any blockages or restrictions in the fuel flow. Over time, debris, contaminants, or water can accumulate in the strainer and filter, leading to reduced performance and potential damage to the fuel pump and other components.
The strainer and filter play a crucial role in maintaining the fuel system's integrity by trapping impurities and ensuring that clean fuel reaches the engine. Therefore, it is recommended to inspect and maintain these components periodically to ensure optimal performance and prolong the life of the fuel-related components in the Toyotomi BS-36U.
Additionally, it is worth noting that issues with the strainer and filter can lead to ignition problems. A clogged strainer or filter can restrict the flow of fuel, causing the engine to receive insufficient fuel for proper combustion. As a result, the Toyotomi BS-36U may experience intermittent stopping or faulting issues, as reported by some users. Therefore, regularly checking and cleaning the strainer and filter is an essential aspect of maintaining the overall performance and reliability of the equipment.
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Loosen the screw on the strainer to bleed air out of the line
Loosening the screw on the strainer is a critical step in bleeding air out of the fuel line of your Toyotomi BS-36U water heater. This process is essential to ensure the smooth and efficient operation of your heating system. Here's a detailed guide on how to approach this task:
First, locate the strainer. The strainer is a crucial component of your Toyotomi BS-36U water heater, responsible for filtering out impurities from the fuel before it enters the combustion chamber. It is typically located near the fuel line, and you can refer to the system's manual for the exact location.
Once you've found the strainer, place a rag or a small container underneath the screw on the top of the strainer. This is important to catch any fuel that might leak out when you loosen the screw. You don't want to spill fuel, as it can be hazardous and cause a mess. Ensure you have a clean, dry rag or a suitable container specifically for this purpose.
Now, you can begin to loosen the screw. Using the appropriate tool, usually a screwdriver, carefully turn the screw in the counter-clockwise direction. This action will slowly open the strainer, allowing any trapped air to escape from the fuel line. You may hear a slight hissing sound as the air escapes, which is normal.
As you loosen the screw, keep an eye on the strainer and the fuel line. You should see a gradual release of air bubbles, indicating that the air is being bled out of the system. Continue loosening the screw until you notice a steady stream of fuel flowing from the strainer, free of any air bubbles. This visual inspection ensures that you have successfully removed the air from the fuel line.
Finally, once you're satisfied that the air has been sufficiently removed, carefully tighten the screw back in place. Make sure it is secure, but avoid overtightening, as this could damage the screw or the strainer. Check the rag or container underneath for any spilled fuel, and dispose of it properly.
Remember, it is essential to exercise caution when working with fuel systems. Always refer to the manufacturer's instructions or seek professional assistance if you are unsure about any part of the process.
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Ensure the fuel is clean and free from dirt and water
To ensure the fuel is clean and free from dirt and water, you must only use ASTM No. 1-K Grade kerosene or No.1 fuel oil with your Toyotomi BS-36UFF. Using low-quality kerosene will cause burner performance to drop, leading to abnormal combustion and a reduced unit life.
Never use gasoline, thinner, benzene, light oil, or waste oil with your BS-36UFF. Water and dirt may cause combustion failure and shorten the life of components such as the fuel pump. Always be sure to refuel before the tank runs out.
Additionally, it is important to check and clean the strainer/filter for the fuel. There is a screw on the top of the strainer that you can loosen to "bleed" any air out of the line. Place a rag under the screw when loosening to catch any fuel that may spill.
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Use ASTM No. 1-K Grade kerosene or No.1 fuel oil only
When bleeding the fuel line of a Toyotomi BS-36U, it is imperative to use the correct type of fuel to ensure optimal performance and safety. The recommended fuel types for this unit are ASTM No. 1-K Grade kerosene or No. 1 fuel oil. Here's why these specific fuel types are important:
ASTM No. 1-K Grade Kerosene:
This is a special low-sulfur grade of kerosene that is designed for use in nonflue-connected kerosene burner appliances. It is a refined petroleum distillate, consisting of a homogeneous mixture of hydrocarbons. ASTM No. 1-K grade kerosene is essentially free of water, inorganic acidic or basic compounds, and excessive particulate contaminants. This grade of kerosene is suitable for the Toyotomi BS-36U as it meets the required specifications for burner applications.
No. 1 Fuel Oil:
Also known as coal oil, stove oil, or range oil, No. 1 fuel oil is a volatile distillate oil. It is commonly used in vaporizing pot-type burners and high-performance/clean diesel engines. No. 1 fuel oil is ideal for the Toyotomi BS-36U as it can provide the necessary combustion and energy required for the unit's operation.
Using the correct fuel type is crucial to ensure the safe and efficient operation of the Toyotomi BS-36U. Both ASTM No. 1-K Grade kerosene and No. 1 fuel oil are suitable options, and users should refer to the unit's manual or seek professional advice to determine which fuel type is most appropriate for their specific needs and local regulations.
Additionally, it is important to address any potential issues with the fuel line, such as leaks or air pockets, as mentioned in your initial query. Bleeding the fuel line of the Toyotomi BS-36U involves releasing any trapped air in the line. This can be done by locating the screw on the top of the strainer and loosening it, remembering to place a rag underneath to catch any drips. This process will help ensure that the unit operates effectively and reduces the risk of ignition issues caused by air pockets.
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Avoid exposure to rain or moisture
The Toyotomi BS-36UFF is an on-demand, direct-vent, sealed combustion water heater that uses either ASTM No. 1-K Grade kerosene or No. 1 fuel oil. It is important to avoid exposing the unit to rain or moisture, as indicated in the safety guidelines. Here are some detailed instructions to help you avoid exposure to rain or moisture when bleeding the fuel line of your Toyotomi BS-36U:
Firstly, locate the fuel filter and strainer. Check if the strainer is clean and free from any blockages. If necessary, clean or replace the strainer to ensure no debris or water enters the fuel line. This is crucial as water and dirt can cause combustion failure and damage to components like the fuel pump.
Next, identify the bleed screw on the fuel line or the top of the strainer. Place a small container or pan underneath the bleed screw to catch any oil that may drain from the line. Use a wrench or Allen key to gradually loosen the bleed screw, but only partially. Do not remove the screw completely, as it will cause high-pressure oil to spurt out and create a mess.
Once the screw is loose, push the reset button on your boiler. Keep your wrench or Allen key handy to tighten the screw when needed. Listen carefully for a hissing sound, indicating that air is escaping from the line. The hissing will be followed by a sputtering mixture of oil and air.
After the initial air has been released, you should observe a steady flow of oil. At this point, it is important to act quickly to avoid any further exposure to moisture in the environment. Tighten the bleed screw securely using your wrench or Allen key. Ensure that it is fastened tightly to prevent any oil leakage.
By following these steps, you can effectively bleed the fuel line of your Toyotomi BS-36U while adhering to the safety guidelines of avoiding exposure to rain or moisture. Remember to refer to the official maintenance instructions for further clarification if needed.
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Frequently asked questions
To bleed the fuel line, you must first check and clean the strainer/filter for the fuel. There is a screw on top of the strainer that you can loosen to "bleed" any air out of the line. Be sure to place a rag under the screw to catch any spillage.
The Toyotomi BS-36U is designed for use with ASTM No. 1-K Grade kerosene or No.1 fuel oil only. Do not use gasoline, thinner, benzene, light oil or waste oil.
It is recommended to bleed your fuel line whenever you notice any issues with your water heater. However, it is also good practice to perform regular maintenance and check for any blockages or dirt in the fuel line to ensure optimal performance.











































