The Riello G5 burner is a compact light oil burner from Riello’s well-known G series. Sparks Plumbing Experts supplies it in Kenya, Uganda and Tanzania for boiler technicians, hotels, hospitals, schools and factories that heat water or air with diesel.
Because burners must match the boiler they fire, we check your boiler details and current set-up before we quote. In addition, we can advise on the nozzles, photocells and fittings that go with it.
What is a Riello G5 burner?
An oil burner turns liquid fuel into a controlled flame inside a boiler or furnace. A small pump pushes the oil at high pressure through a nozzle, which breaks it into a fine mist. A fan blows air into that mist, and an ignition spark lights it. Finally, a photocell watches the flame and shuts the fuel off if the flame goes out.
The Riello G5 is a single-stage light oil burner, which means it runs at one fixed firing rate and switches fully on or off. The nozzle size sets the actual oil flow, so the same burner can suit a range of small boilers when the technician fits the right nozzle.
Further reading
- Oil burners explained (Wikipedia)
- How boilers work (Wikipedia)
- Riello, the burner manufacturer (Riello)
Key terms explained
- Light oil
- Low-viscosity heating fuel such as diesel or gas oil.
- Nozzle
- The small brass part that sprays oil as a fine mist; rated by flow (GPH) and spray angle.
- Photocell
- A light sensor that proves the flame is burning.
- Single stage
- The burner runs at one fixed output and cycles on and off.
- Combustion analysis
- Measuring flue gases to set the air and fuel mix correctly.
Features and benefits
- Compact single-stage design for small heating plants
- Pressure-jet atomisation for a clean, stable flame
- Output set by nozzle choice, giving flexibility on site
- Flame safety through a photocell and control box
- Widely known design, which makes servicing familiar to technicians
- Supported by our range of nozzles, photocells and burner fittings
Technical specifications
| Product | Riello G5 burner |
|---|---|
| Fuel | Light oil (diesel / gas oil) |
| Operation | Single stage, on/off |
| Atomisation | Pressure jet through a replaceable nozzle |
| Flame supervision | Photocell with burner control box |
| Typical use | Small boilers, water heaters and hot air generators |
| Supplier | Sparks Plumbing Experts Ltd, Nairobi |
Firing range, motor rating and electrical data depend on the exact version. Ask us for the manufacturer data sheet before you size the burner to a boiler.
Applications of a Riello G5 burner
- Hot water boilers. Firing small boilers that supply hot water to buildings.
- Hotels and lodges. Heating water for rooms, kitchens and laundries.
- Hospitals and clinics. Supporting hot water for wards, theatres and sterilising areas.
- Schools and colleges. Running boilers for kitchens and boarding facilities.
- Commercial laundries. Providing heat for washing and drying processes.
- Hot air generators. Heating air for drying rooms and workshops.
- Food processing. Supplying process hot water in small plants.
- Dairy units. Heating water for cleaning and pasteurising equipment.
- Greenhouses. Firing heaters that protect crops during cold nights.
- Poultry farms. Running brooder and space heaters for young birds.
- Apartment blocks. Firing central hot water boilers in residential buildings.
- Burner replacement. Replacing worn burners on existing small boilers.
- Standby heating. Backing up electric or solar water heating systems.
- Workshops. Heating small industrial spaces and paint drying areas.
- Training centres. Teaching burner servicing in technical colleges.
How to choose and install
- Match the burner output to the boiler rating shown on the boiler plate.
- Fit the nozzle size and spray angle recommended for the boiler and firing rate.
- Check that the fuel line, filter and tank supply clean diesel without air leaks.
- Confirm the boiler front plate and blast tube length suit the burner.
- Set up the burner with a combustion analyser rather than by eye.
- Service the nozzle, electrodes and photocell at regular intervals.
Why choose Sparks Plumbing Experts
- Burners and their sparesNozzles, photocells, electrodes and fittings are stocked alongside the burners they serve.
- Well-known burner brandsOur range includes Riello burners, plus Danfoss and Steinen nozzles.
- Boiler room accessoriesGauges, controls and boiler accessories help you keep heating plant running.
- Nozzle selection helpSend your boiler details, and we help you choose the right nozzle size and angle.
- Visit or collect in NairobiOur store is at KCB Building, Enterprise Road, in the Industrial Area, so you can see parts before you buy or collect your order.
- Quotes your wayAsk for prices by phone, WhatsApp, email or the online quote form, whichever suits you on site.
- Over 1,600 products in one placeOur catalogue covers 55 categories, so one supplier can handle most of your parts list.
- Help choosing the right partSend a nameplate photo, a drawing or the old part, and we help you match size and specification.
- Single items or project quantitiesWe price a single replacement part just as readily as a full site order.
- Supply across East AfricaWe serve customers across Kenya, and we also supply buyers in Uganda and Tanzania.
Related products and accessories
Browse more: Burners · Burner Nozzles · Photocells · Boiler Accessories · Burner fittings · Fuel Pumps.
Ordering from Sparks Plumbing Experts
We supply customers across Kenya, and we also serve buyers in Uganda and Tanzania. You can collect from our store at KCB Building, Enterprise Road, Nairobi, or ask us about delivery to your site. Send your quantities and specifications, and we will reply with prices and availability.
Request a Quote WhatsApp 0726 086 895
Frequently asked questions
What fuel does the Riello G5 burn?
It burns light oil, such as diesel or gas oil. It is not a gas burner, so check the fuel type before you order.
What is the Riello G5 used for?
It fires small boilers, water heaters and hot air generators in hotels, hospitals, schools, farms and workshops.
What does single stage mean?
The burner runs at one fixed output and switches fully on or off as the boiler thermostat calls for heat.
How is the firing rate set?
Mainly by the nozzle. A larger nozzle passes more oil, so the technician picks the nozzle and pump pressure to suit the boiler.
Which nozzle do I need?
It depends on the boiler output and combustion chamber. Send us the boiler details and your current nozzle markings, and we will advise.
Why does my burner lock out?
Common causes include a dirty nozzle, air in the fuel line, a blocked filter, a dirty photocell or worn electrodes. A technician should find the cause before resetting it repeatedly.
How often should it be serviced?
Most heating plants service burners at least once a year, and busy plants more often. Servicing includes the nozzle, electrodes, photocell, filter and a combustion check.
Do you sell spare parts for Riello burners?
Yes. We stock burner nozzles, photocells and burner fittings, and we can quote other parts on request.
Can it replace a different brand of burner?
Often it can, provided the output and mounting suit the boiler. A technician should check the boiler plate, chamber size and controls first.
Who should install it?
A trained boiler or burner technician should install and commission it, including a combustion test.
Do you deliver outside Nairobi?
We supply customers across Kenya, and we also serve buyers in Uganda and Tanzania. We confirm delivery options for your site with the quote.
How do I get a price?
Request a quote or message us on WhatsApp with the boiler details. We reply with current pricing and availability.
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Riello G3 vs G5 vs G10
They belong to the same light oil burner family. The higher the number, the higher the firing range, so match the model to your boiler output.
Diesel burner nozzle sizes
Nozzles are rated by flow in US gallons per hour (GPH), spray angle such as 60 degrees, and spray pattern. The boiler output decides the right nozzle.
How does a burner photocell work?
It senses the light of the flame. If it sees no flame after ignition, the control box shuts off the fuel and locks out.
How to reset a Riello burner
Press the reset button on the control box once. If it locks out again, stop and find the cause, because repeated resets can flood the chamber with oil.
Oil burner vs gas burner
Oil burners run from a stored fuel tank and suit sites without gas supply. Gas burners burn cleaner but need a gas supply and different safety controls.
Boiler burner service checklist
Clean or replace the nozzle and filter, check electrodes and photocell, clean the fan, then run a combustion test.
What is a combustion analyser?
It measures flue gases such as oxygen, carbon monoxide and temperature, so technicians can set the air and fuel mix for clean, efficient burning.
Riello burner spare parts
Common spares include nozzles, photocells, electrodes, fuel pumps, couplings and control boxes. Ask us for the parts your model needs.
Light oil vs heavy oil burner
Light oil burners such as the G5 burn diesel or gas oil. Heavy fuel oil needs heating and a different type of burner.
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