Rajan Wilcox
Replacing a Riello fuel pump is a relatively straightforward task. The first steps are to shut off the fuel tank valve and the power to the furnace. You'll also need to put some cat litter under the burner to soak up any oil that will drip when you disconnect the fuel line(s). The relationship between a given nozzle and pump pressure should be maintained when replacing the oil pump. It's common to bump the pressure up to 140 on a pump and use a smaller nozzle to maintain a certain firing rate. The service card should specify the current pressure. And you should verify that is what the new pump is set at.
| Characteristics | Values |
|---|---|
| First step | Shut off the fuel tank valve |
| Second step | Shut off power to the furnace |
| Third step | Put cat litter under the burner to soak up oil that will drip when you disconnect the fuel line(s) |
| Fourth step | The relationship between a given nozzle and pump pressure should be maintained when replacing the oil pump |
| Fifth step | It's common to bump the pressure up to 140 on a pump and use a smaller nozzle to maintain a certain firing rate |
| Sixth step | The service card should specify the current pressure and you should verify that is what the new pump is set at |
| Seventh step | Most Suntech pumps come preset at 100 psi |
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What You'll Learn
Shut off the fuel tank valve and power to the furnace
To replace a Riello fuel pump, you must first shut off the fuel tank valve and power to the furnace. This is a crucial step to prevent any oil from leaking out of the fuel lines and causing a hazard. Place some cat litter under the burner to soak up any oil that may drip out.
Next, you will need to disconnect the fuel lines. This will involve loosening the fittings that secure the lines to the pump. Be careful not to damage the lines, as this could lead to leaks. Once the lines are disconnected, you can remove the old pump.
When installing the new pump, it is important to maintain the proper relationship between the nozzle and pump pressure. The service card should specify the current pressure, and you should verify that the new pump is set to this pressure. Most Suntech pumps come preset at 100 psi.
Finally, reconnect the fuel lines to the new pump and turn on the power to the furnace. Bleed any air from the system, and then test the furnace to ensure it is functioning properly.
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Use metric allen wrenches
To replace a Riello fuel pump, you will need metric allen wrenches.
Firstly, shut off the fuel tank valve and shut off the power to the furnace. Place some cat litter under the burner to soak up the oil that will drip when you disconnect the fuel line(s).
The relationship between a given nozzle and pump pressure should be maintained when replacing the oil pump. It's common to bump the pressure up to 140 on a pump and use a smaller nozzle to maintain a certain firing rate. The service card should specify the current pressure. Verify that this is what the new pump is set at. Most Suntech pumps come preset at 100 psi.
A one pipe fuel system is designed to work with one pipe. The second port, which can allow a second pipe to be added, is restricted with a blanking plug that redirects the oil to the nozzle and only takes what is needed. Unlike the two pipe system, air in the system would need to be bled manually via the pressure adjuster. A two pipe oil feed system will allow air and oil to return back down the return line and back into the oil tank.
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Put cat litter under the burner to soak up oil
To replace a Riello fuel pump, you'll need to shut off the fuel tank valve and power to the furnace. Put some cat litter under the burner to soak up any oil that drips when you disconnect the fuel line(s).
When replacing the oil pump, it's important to maintain the relationship between the nozzle and pump pressure. The service card should specify the current pressure, and you should verify that the new pump is set at the same pressure. Most Suntech pumps come preset at 100 psi.
If you're converting from a one-pipe fuel system to a two-pipe system, you'll need to remove the blanking plug that restricts the second port. This will allow a second pipe to be added and will redirect the oil to the nozzle, ensuring that only the necessary amount of oil is used.
A two-pipe oil feed system allows air and oil to return to the oil tank via the return line. This is in contrast to a one-pipe system, where air in the system would need to be bled manually via the pressure adjuster.
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The relationship between nozzle and pump pressure
Replacing a Riello fuel pump is a relatively straightforward task. You will need metric allen wrenches, and you should shut off the fuel tank valve and power to the furnace before you begin. It is also a good idea to put some cat litter under the burner to soak up any oil that drips when you disconnect the fuel line(s).
In general, when pump pressure increases, flow decreases. For example, a misting pump rated at 1,000 PSI will have a low flow rate of .25 GPM, but the higher pressure combined with the right nozzles will result in an ultra-fine mist with very little flow. On the other hand, a soft wash sprayer rated at 100 PSI can achieve a vertical throw of nearly 40 feet and a horizontal throw of more than 50 feet when paired with the proper nozzles.
The head pressure is expressed in terms of loss or gain. Because the pump and the nozzle are at opposite ends of the hose, the head pressure at the pump will be the opposite at the nozzle. For example, if the hose lay is uphill, the head pressure is negative at the pump and positive at the nozzle.
Nozzles are intended to create velocity in your water stream to project your stream the required distance. This builds pressure. An increase in flow will result in an increase in nozzle pressure, and the nozzle reaction is proportional to the increase in pressure. With a fixed flow nozzle, if you double your flow, you will quadruple your exit pressure.
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Converting a one pipe system to a two pipe system
To replace a Riello fuel pump, you will need metric allen wrenches. First, shut off the fuel tank valve and the power to the furnace. Put some cat litter under the burner to soak up oil that will drip when you disconnect the fuel line(s).
When replacing the oil pump, the relationship between a given nozzle and pump pressure should be maintained. It's common to bump the pressure up to 140 on a pump and use a smaller nozzle to maintain a certain firing rate. The service card should specify the current pressure and you should verify that is what the new pump is set at. Most Suntech pumps come preset at 100 psi.
A one pipe fuel system is designed to work with one pipe. The second port, which can allow a second pipe to be added, is restricted with a blanking plug that redirects the oil to the nozzle and only takes what is needed. Unlike the two pipe system, air in the system would need to be bled manually via the pressure adjuster.
A two pipe oil feed system will allow air and oil to return back down the return line and back into the oil tank.
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Frequently asked questions
You'll need metric allen wrenches.
You should shut off the fuel tank valve and the power to the furnace. You should also put some cat litter under the burner to soak up oil that will drip when you disconnect the fuel line(s).
It's common to bump the pressure up to 140 on a pump and use a smaller nozzle to maintain a certain firing rate. The service card should specify the current pressure, and you should verify that is what the new pump is set at. Most Suntech pumps come preset at 100 psi.
